fix(session-ui): align provider error icon with first line

Co-authored-by: Test User <test@test.com>

.github/workflows/nix-eval.yml

@@ -2,9 +2,9 @@ name: nix-eval
 
 on:
   push:
-    branches: [dev]
+    branches: [dev, v2]
   pull_request:
-    branches: [dev]
+    branches: [dev, v2]
   workflow_dispatch:
 
 concurrency:

bun.lock

@@ -33,7 +33,7 @@
     },
     "packages/ai": {
       "name": "@opencode/ai",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@aws-sdk/credential-providers": "3.1057.0",
         "@opencode/schema": "workspace:*",
@@ -55,7 +55,7 @@
     },
     "packages/app": {
       "name": "@opencode/app",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@corvu/drawer": "catalog:",
         "@dnd-kit/abstract": "0.5.0",
@@ -112,7 +112,7 @@
     },
     "packages/cli": {
       "name": "@opencode/cli",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "bin": {
         "opencode": "./bin/opencode.cjs",
         "opencode2": "./bin/opencode2.cjs",
@@ -133,6 +133,7 @@
         "@opentui/solid": "catalog:",
         "@parcel/watcher": "2.5.1",
         "@silvia-odwyer/photon-node": "0.3.4",
+        "diff": "catalog:",
         "effect": "catalog:",
         "immer": "11.1.4",
         "jsonc-parser": "3.3.1",
@@ -178,7 +179,7 @@
     },
     "packages/client": {
       "name": "@opencode/client",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/protocol": "workspace:*",
         "@opencode/schema": "workspace:*",
@@ -204,7 +205,7 @@
     },
     "packages/codemode": {
       "name": "@opencode/codemode",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "acorn": "8.15.0",
         "effect": "catalog:",
@@ -217,7 +218,7 @@
     },
     "packages/console/app": {
       "name": "@opencode/console-app",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@cloudflare/vite-plugin": "1.15.2",
         "@ibm/plex": "6.4.1",
@@ -253,7 +254,7 @@
     },
     "packages/console/core": {
       "name": "@opencode/console-core",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@aws-sdk/client-sts": "3.782.0",
         "@jsx-email/render": "1.1.1",
@@ -280,7 +281,7 @@
     },
     "packages/console/function": {
       "name": "@opencode/console-function",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@openauthjs/openauth": "0.0.0-20250322224806",
         "@opencode/console-core": "workspace:*",
@@ -297,7 +298,7 @@
     },
     "packages/console/mail": {
       "name": "@opencode/console-mail",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@jsx-email/all": "2.2.3",
         "@jsx-email/cli": "1.4.3",
@@ -321,7 +322,7 @@
     },
     "packages/console/support": {
       "name": "@opencode/console-support",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@cloudflare/vite-plugin": "1.15.2",
         "@opencode/console-core": "workspace:*",
@@ -341,7 +342,7 @@
     },
     "packages/core": {
       "name": "@opencode/core",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@ai-sdk/cohere": "3.0.27",
         "@ai-sdk/gateway": "3.0.104",
@@ -410,7 +411,7 @@
     },
     "packages/desktop": {
       "name": "@opencode/desktop",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@zip.js/zip.js": "2.7.62",
         "electron-context-menu": "5.0.0",
@@ -455,7 +456,7 @@
     },
     "packages/enterprise": {
       "name": "@opencode/enterprise",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@hono/standard-validator": "catalog:",
         "@opencode-ai/sdk": "1.18.21",
@@ -492,7 +493,7 @@
     },
     "packages/function": {
       "name": "@opencode/function",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@octokit/auth-app": "8.0.1",
         "@octokit/rest": "catalog:",
@@ -508,7 +509,7 @@
     },
     "packages/gui-extensions": {
       "name": "@opencode/gui-extensions",
-      "version": "2.0.20",
+      "version": "2.0.22",
       "dependencies": {
         "@dnd-kit/abstract": "0.5.0",
         "@dnd-kit/dom": "0.5.0",
@@ -553,7 +554,7 @@
     },
     "packages/http-recorder": {
       "name": "@opencode/http-recorder",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@effect/platform-node-shared": "4.0.0-rc.112",
       },
@@ -572,7 +573,7 @@
     },
     "packages/httpapi-codegen": {
       "name": "@opencode/httpapi-codegen",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "effect": "catalog:",
         "prettier": "3.6.2",
@@ -585,7 +586,7 @@
     },
     "packages/latex": {
       "name": "@opencode/latex",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/plugin": "workspace:*",
         "@opentui/core": "catalog:",
@@ -599,7 +600,7 @@
     },
     "packages/merman": {
       "name": "@opencode/merman",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/plugin": "workspace:*",
         "@opentui/core": "catalog:",
@@ -614,7 +615,7 @@
     },
     "packages/plugin": {
       "name": "@opencode/plugin",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@ai-sdk/provider": "3.0.8",
         "@opencode/ai": "workspace:*",
@@ -653,7 +654,7 @@
     },
     "packages/plugin-browser": {
       "name": "@opencode/plugin-browser",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/plugin": "workspace:*",
         "@opencode/schema": "workspace:*",
@@ -683,7 +684,7 @@
     },
     "packages/protocol": {
       "name": "@opencode/protocol",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/schema": "workspace:*",
         "effect": "catalog:",
@@ -698,7 +699,7 @@
     },
     "packages/schema": {
       "name": "@opencode/schema",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@standard-schema/spec": "catalog:",
         "effect": "catalog:",
@@ -722,7 +723,7 @@
     },
     "packages/sdk": {
       "name": "@opencode/sdk",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/client": "workspace:*",
         "@opencode/core": "workspace:*",
@@ -743,7 +744,7 @@
     },
     "packages/server": {
       "name": "@opencode/server",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@effect/platform-node": "catalog:",
         "@effect/platform-node-shared": "catalog:",
@@ -765,7 +766,7 @@
     },
     "packages/session-ui": {
       "name": "@opencode/session-ui",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@kobalte/core": "catalog:",
         "@opencode/client": "workspace:*",
@@ -800,7 +801,7 @@
     },
     "packages/simulation": {
       "name": "@opencode/simulation",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/ai": "workspace:*",
         "@opencode/core": "workspace:*",
@@ -820,7 +821,7 @@
     },
     "packages/stats/app": {
       "name": "@opencode/stats-app",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@ibm/plex": "6.4.1",
         "@kobalte/core": "catalog:",
@@ -854,7 +855,7 @@
     },
     "packages/stats/core": {
       "name": "@opencode/stats-core",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@aws-sdk/client-athena": "3.933.0",
         "@planetscale/database": "1.19.0",
@@ -873,7 +874,7 @@
     },
     "packages/stats/server": {
       "name": "@opencode/stats-server",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@aws-sdk/client-firehose": "3.933.0",
         "@effect/platform-node": "catalog:",
@@ -919,7 +920,7 @@
     },
     "packages/theme": {
       "name": "@opencode/theme",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opentui/core": "catalog:",
         "effect": "catalog:",
@@ -933,7 +934,7 @@
     },
     "packages/tui": {
       "name": "@opencode/tui",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@opencode/client": "workspace:*",
         "@opencode/core": "workspace:*",
@@ -967,7 +968,7 @@
     },
     "packages/ui": {
       "name": "@opencode/ui",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@kobalte/core": "catalog:",
         "@pierre/diffs": "catalog:",
@@ -1002,7 +1003,7 @@
     },
     "packages/util": {
       "name": "@opencode/util",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@effect/opentelemetry": "catalog:",
         "@effect/platform-node": "catalog:",
@@ -1040,7 +1041,7 @@
     },
     "packages/web": {
       "name": "@opencode/web",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "@astrojs/cloudflare": "12.6.3",
         "@astrojs/markdown-remark": "6.3.1",
@@ -1081,7 +1082,7 @@
     },
     "services/update": {
       "name": "@opencode/update",
-      "version": "2.0.21",
+      "version": "2.0.22",
       "dependencies": {
         "jose": "6.0.11",
         "semver": "catalog:",

nix/desktop.nix

@@ -13,7 +13,12 @@
   opencode,
 }:
 let
-  electron = callPackage ./electron.nix { };
+  electronPin =
+    (lib.pipe ../packages/desktop/package.json [
+      builtins.readFile
+      builtins.fromJSON
+    ]).devDependencies.electron;
+  electron = callPackage ./electron.nix { inherit electronPin; };
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "opencode-desktop";
@@ -66,7 +71,7 @@ stdenv.mkDerivation (finalAttrs: {
     ''
     # https://github.com/electron/electron/issues/31121
     # mac builds use a .app bundle which doesnt have this issue
-    + lib.optionalString stdenv.isLinux ''
+    + lib.optionalString stdenv.hostPlatform.isLinux ''
       substituteInPlace \
         packages/desktop/src/main/windows/appearance.ts \
         packages/desktop/src/main/service/desktop-cli.ts \
@@ -74,6 +79,7 @@ stdenv.mkDerivation (finalAttrs: {
     '';
 
   preBuild = ''
+    echo "electron ${electron.version} from nixpkgs ${lib.version}, package.json pins ${electronPin}"
     cp -r "${electron.dist}" $HOME/.electron-dist
     chmod -R u+w $HOME/.electron-dist
 
@@ -89,8 +95,15 @@ stdenv.mkDerivation (finalAttrs: {
 
     export OPENCODE_CLI_DIST="$TMPDIR/desktop-cli"
     cli_package=$(bun -e 'import { getCurrentCli } from "./scripts/utils.ts"; console.log(getCurrentCli().package.replace("@opencode/", ""))')
+    # copyBuiltCliToResources joins this dist with the npm package name getCurrentCli()
+    # reports, not the Nix build's name. It reads only .version from the manifest and
+    # writes it as opencode-cli.version beside the binary.
     mkdir -p "$OPENCODE_CLI_DIST/$cli_package/bin"
     cp ${lib.getExe opencode} "$OPENCODE_CLI_DIST/$cli_package/bin/opencode"
+    # OPENCODE_VERSION is what the bundled CLI prints for --version, so the manifest
+    # and the executable cannot drift.
+    bun -e 'await Bun.write(process.argv[1], JSON.stringify({ version: process.env.OPENCODE_VERSION }) + "\n")' \
+      "$OPENCODE_CLI_DIST/$cli_package/package.json"
 
     bun run build
     npx electron-builder --dir \
@@ -138,6 +151,13 @@ stdenv.mkDerivation (finalAttrs: {
     "libc.musl-x86_64.so.1"
   ];
 
+  passthru = {
+    # electronVersion is what ships; electronPin is what packages/desktop/package.json
+    # asks for. They differ whenever nixpkgs carries no release of the pinned minor.
+    electronVersion = electron.version;
+    inherit electronPin;
+  };
+
   meta = {
     description = "OpenCode Desktop App";
     mainProgram = "opencode-desktop";

nix/electron.nix

@@ -1,12 +1,10 @@
-{ callPackage, path }:
+{ lib, pkgs, electronPin }:
 let
-  version = (builtins.fromJSON (builtins.readFile ../packages/desktop/package.json)).devDependencies.electron;
+  # Nixpkgs owns the release hashes, so bumping the pin no longer means editing this repo. Only the
+  # major is delegated, so what gets built trails the pin whenever nixpkgs has not shipped it yet.
+  # That is safe: the bundle ships one native addon, node-pty's Node-API prebuild, and
+  # only the win32 WSL runtime loads it, so nothing in the main process binds the
+  # Electron ABI.
+  major = lib.versions.major electronPin;
 in
-(callPackage (path + "/pkgs/development/tools/electron/binary/generic.nix") { }) version {
-  # Electron 42.10.1 SHASUMS256.txt; update with the desktop package version.
-  aarch64-linux = "20e68d6c4e47f3ebf59de7c6b1f8b8bec6a6ebda6a451132f9b465f3f13ce467";
-  x86_64-linux = "2452b27112d92387471fa2488aafac85d79ea3f2ee1216c0abd5150d6c12362b";
-  aarch64-darwin = "ac7194a3dfd81930ba35355c01620262c1254752859b42dcb8f4b9e4d174a871";
-  # fetchzip hashes the unpacked headers, not the release tarball.
-  headers = "sha256-4eUy3BZVvxTl7KUOsxio7769lL6ag/ecbeK+qLURWMI=";
-}
+pkgs."electron_${major}-bin" or (throw "nixpkgs ${lib.version} carries no prebuilt electron ${major}: run `nix flake update nixpkgs`, or pin a major nixpkgs still carries")

nix/hashes.json

@@ -1,7 +1,7 @@
 {
   "nodeModules": {
-    "x86_64-linux": "sha256-g3k0cAFGqzmRYlcIkg1NDvlx1WxHYhnYPL0/a8E+qTg=",
-    "aarch64-linux": "sha256-a+3ymqdxOONGe2Tpq4GUccl1b+Dwzxlb9LFXgE1gZ+0=",
-    "aarch64-darwin": "sha256-h8xIzuMmaWfJqjHCO74xUDCWNKQLFrIGoKYZ+2TauYc="
+    "x86_64-linux": "sha256-EEBz2IQ14YPShAzY13zpZ7btq/EuSw86pZ6nrizc9BI=",
+    "aarch64-linux": "sha256-X7om4U4OlKL4OddEMcyKL+1DCQXc9/f1xzzopE16Zmk=",
+    "aarch64-darwin": "sha256-3bejEuX3AGv4SR/16O8KjNSO2t9WDaWCHRbBXsJ6z8A="
   }
 }

nix/opencode.nix

@@ -12,7 +12,7 @@
   installShellFiles,
   versionCheckHook,
   writableTmpDirAsHomeHook,
-  node_modules ? callPackage ./node-modules.nix { },
+  node_modules ? callPackage ./node_modules.nix { },
 }:
 stdenvNoCC.mkDerivation (finalAttrs: {
   pname = "opencode";
@@ -85,14 +85,30 @@ stdenvNoCC.mkDerivation (finalAttrs: {
   '';
 
   postInstall = lib.optionalString (stdenvNoCC.buildPlatform.canExecute stdenvNoCC.hostPlatform) ''
-    # trick yargs into also generating zsh completions
+    # v2 dropped the `completion` subcommand; --completions is the global flag.
+    # --completions also accepts sh, which emits the same script as bash.
+    # staged to files, substitute below rejects anything that is not a regular file
+    $out/bin/opencode --completions bash > opencode.bash
+    $out/bin/opencode --completions zsh > _opencode
+    $out/bin/opencode --completions fish > opencode.fish
+
     installShellCompletion --cmd opencode \
-      --bash <($out/bin/opencode completion) \
-      --zsh <(SHELL=/bin/zsh $out/bin/opencode completion)
+      --bash opencode.bash \
+      --fish opencode.fish \
+      --zsh _opencode
+
+    # OPENCODE_CLI_NAME is a build-time define, so the opencode2 copies are
+    # renamed rather than regenerated. --replace-fail is a global literal
+    # substitution, so any lowercase opencode that later appears in a
+    # description or help text ships as opencode2 in the opencode2 copy.
+    substitute opencode.bash opencode2.bash --replace-fail opencode opencode2
+    substitute _opencode _opencode2 --replace-fail opencode opencode2
+    substitute opencode.fish opencode2.fish --replace-fail opencode opencode2
 
     installShellCompletion --cmd opencode2 \
-      --bash <($out/bin/opencode2 completion) \
-      --zsh <(SHELL=/bin/zsh $out/bin/opencode2 completion)
+      --bash opencode2.bash \
+      --fish opencode2.fish \
+      --zsh _opencode2
   '';
 
   nativeInstallCheckInputs = [

package.json

@@ -2,7 +2,7 @@
   "$schema": "https://json.schemastore.org/package.json",
   "name": "opencode",
   "description": "AI-powered development tool",
-  "version": "2.0.21",
+  "version": "2.0.22",
   "private": true,
   "type": "module",
   "packageManager": "bun@1.4.2",

packages/ai/README.md

@@ -1223,7 +1223,7 @@ const gateway = CloudflareAIGateway.configure({
 }).model("workers-ai/@cf/meta/llama-3.1-8b-instruct")
 ```
 
-Included LLM providers: OpenAI, Anthropic, Google (Gemini), Google Vertex, Amazon Bedrock, Azure OpenAI, Baseten, Cerebras, Cloudflare AI Gateway, Cloudflare Workers AI, DeepInfra, DeepSeek, Fireworks, Groq, Mistral, OpenRouter, TogetherAI, and xAI. Z.ai currently exposes image generation. Generic Chat Completions, Responses, and Anthropic Messages-compatible entrypoints support custom endpoints.
+Included LLM providers: OpenAI, Anthropic, Google (Gemini), Google Vertex, Amazon Bedrock, Azure OpenAI, Baseten, Cerebras, Cohere, Cloudflare AI Gateway, Cloudflare Workers AI, DeepInfra, DeepSeek, Fireworks, Groq, Mistral, OpenRouter, TogetherAI, and xAI. Z.ai currently exposes image generation. Generic Chat Completions, Responses, and Anthropic Messages-compatible entrypoints support custom endpoints.
 
 Each named provider owns its module, endpoint, authentication, and route setup. Providers with the same wire format compose the shared protocol directly:
 

packages/ai/package.json

@@ -1,6 +1,6 @@
 {
   "$schema": "https://json.schemastore.org/package.json",
-  "version": "2.0.21",
+  "version": "2.0.22",
   "name": "@opencode/ai",
   "type": "module",
   "license": "MIT",

packages/ai/src/cache-policy.ts

@@ -38,6 +38,7 @@ const resolve = (policy: CachePolicy | undefined): CachePolicyObject => {
 // prefix caching, Gemini's implicit + out-of-band CachedContent). Skip the
 // whole policy pass for these — emitting hints would be harmless but pointless.
 const RESPECTS_INLINE_HINTS = new Set([
+  "alibaba-chat",
   "alibaba-messages",
   "anthropic-messages",
   "anthropic-compatible-messages",
@@ -55,11 +56,12 @@ const RESPECTS_INLINE_HINTS = new Set([
 // OpenRouter upstreams other than Anthropic and Alibaba Qwen cache without breakpoints. Gemini uses only the last
 // breakpoint, so a conversation-tail breakpoint writes a new cache every step and costs more than none. Qwen ignores
 // breakpoints on tool definitions and caches tools with the system prompt.
+const QWEN: CachePolicyObject = { system: true, messages: { tail: 1 } }
 const openRouterPolicy = (modelID: string): CachePolicyObject => {
   // `~anthropic/claude-sonnet-latest` style IDs are OpenRouter aliases for the latest model in a family.
   const id = modelID.replace(/^~/, "")
   if (id.startsWith("anthropic/")) return AUTO
-  if (id.startsWith("qwen/")) return { system: true, messages: { tail: 1 } }
+  if (id.startsWith("qwen/")) return QWEN
   return NONE
 }
 
@@ -171,7 +173,11 @@ export const applyCachePolicy = (request: LLMRequest): LLMRequest => {
   const policy =
     request.model.route.id === "openrouter" && (request.cache === undefined || request.cache === "auto")
       ? openRouterPolicy(request.model.id)
-      : resolve(request.cache)
+      : request.model.route.id === "alibaba-chat" && (request.cache === undefined || request.cache === "auto")
+        ? request.model.id.toLowerCase().startsWith("qwen")
+          ? QWEN
+          : NONE
+        : resolve(request.cache)
   if (!policy.tools && !policy.system && !policy.messages) return request
 
   const hint = makeHint(policy.ttlSeconds)

packages/ai/src/protocols/alibaba-chat.ts

@@ -3,6 +3,7 @@ import { Protocol } from "../route/protocol.js"
 import type { LanguageModelCompatibility } from "../schema/index.js"
 import { OpenAIChat } from "./openai-chat.js"
 import { JsonObject, ProviderShared } from "./shared.js"
+import { cacheControl } from "./utils/cache.js"
 import { OpenResponsesOptions } from "./utils/open-responses-options.js"
 
 export type ReasoningEffort = OpenResponsesOptions.ReasoningEffort
@@ -68,7 +69,7 @@ export const protocol = Protocol.make({
     from: Effect.fn("AlibabaChat.fromRequest")(function* (req) {
       const opts = yield* ProviderShared.validateWith(Schema.decodeUnknownEffect(Options))(req.providerOptions ?? {})
       return {
-        ...(yield* OpenAIChat.protocol.body.from(req)),
+        ...(yield* OpenAIChat.fromRequest(req, { cacheControl: cacheControl() })),
         enable_thinking: opts.enableThinking,
         // Alibaba also rejects an explicit budget that is not below `max_completion_tokens`.
         thinking_budget:

packages/ai/src/protocols/cohere-chat.ts

@@ -0,0 +1,326 @@
+import { Effect, Schema } from "effect"
+import { Route } from "../route/client.js"
+import { Endpoint } from "../route/endpoint.js"
+import { Framing } from "../route/framing.js"
+import { Protocol } from "../route/protocol.js"
+import { LLMEvent, Usage, type FinishReasonDetails, type LLMRequest } from "../schema/index.js"
+import { ProviderShared } from "./shared.js"
+import { Lifecycle } from "./utils/lifecycle.js"
+import { ToolStream } from "./utils/tool-stream.js"
+
+const ADAPTER = "cohere-chat"
+export const DEFAULT_BASE_URL = "https://api.cohere.com/v2"
+
+const Options = Schema.Struct({
+  thinking: Schema.optional(
+    Schema.Struct({
+      type: Schema.optional(Schema.Literals(["enabled", "disabled"])),
+      tokenBudget: Schema.optional(Schema.Int.check(Schema.isGreaterThan(0))),
+    }),
+  ),
+})
+export type ProviderOptionsInput = Schema.Schema.Type<typeof Options>
+
+const Content = Schema.Union([
+  Schema.Struct({ type: Schema.Literal("text"), text: Schema.String }),
+  Schema.Struct({ type: Schema.Literal("thinking"), thinking: Schema.String }),
+  Schema.Struct({ type: Schema.Literal("image_url"), image_url: Schema.Struct({ url: Schema.String }) }),
+])
+const ToolCall = Schema.Struct({
+  id: Schema.String,
+  type: Schema.Literal("function"),
+  function: Schema.Struct({ name: Schema.String, arguments: Schema.String }),
+})
+const Message = Schema.Struct({
+  role: Schema.Literals(["system", "user", "assistant", "tool"]),
+  content: Schema.optional(Schema.Union([Schema.String, Schema.Array(Content)])),
+  tool_calls: Schema.optional(Schema.Array(ToolCall)),
+  tool_call_id: Schema.optional(Schema.String),
+  tool_plan: Schema.optional(Schema.String),
+})
+const Body = Schema.Struct({
+  model: Schema.String,
+  messages: Schema.Array(Message),
+  stream: Schema.Literal(true),
+  tools: Schema.optional(
+    Schema.Array(
+      Schema.Struct({
+        type: Schema.Literal("function"),
+        function: Schema.Struct({
+          name: Schema.String,
+          description: Schema.optional(Schema.String),
+          parameters: Schema.Unknown,
+        }),
+      }),
+    ),
+  ),
+  tool_choice: Schema.optional(Schema.Literals(["NONE", "REQUIRED"])),
+  thinking: Schema.optional(Schema.Struct({ type: Schema.String, token_budget: Schema.optional(Schema.Number) })),
+  max_tokens: Schema.optional(Schema.Number),
+  temperature: Schema.optional(Schema.Number),
+  p: Schema.optional(Schema.Number),
+  k: Schema.optional(Schema.Number),
+  seed: Schema.optional(Schema.Number),
+  stop_sequences: Schema.optional(Schema.Array(Schema.String)),
+  frequency_penalty: Schema.optional(Schema.Number),
+  presence_penalty: Schema.optional(Schema.Number),
+})
+const TokenCounts = Schema.Struct({
+  input_tokens: Schema.optional(Schema.Number),
+  output_tokens: Schema.optional(Schema.Number),
+  reasoning_tokens: Schema.optional(Schema.Number),
+})
+const NativeUsage = Schema.Struct({
+  tokens: Schema.optional(TokenCounts),
+  billed_units: Schema.optional(TokenCounts),
+  cached_tokens: Schema.optional(Schema.Number),
+})
+const Event = Schema.Union([
+  Schema.Struct({ type: Schema.Literal("message-start") }),
+  Schema.Struct({
+    type: Schema.Literals(["content-start", "content-delta"]),
+    index: Schema.Number,
+    delta: Schema.Struct({
+      message: Schema.Struct({
+        content: Schema.Struct({ text: Schema.optional(Schema.String), thinking: Schema.optional(Schema.String) }),
+      }),
+    }),
+  }),
+  Schema.Struct({ type: Schema.Literal("content-end"), index: Schema.Number }),
+  Schema.Struct({
+    type: Schema.Literal("tool-plan-delta"),
+    delta: Schema.Struct({ message: Schema.Struct({ tool_plan: Schema.String }) }),
+  }),
+  Schema.Struct({
+    type: Schema.Literals(["tool-call-start", "tool-call-delta"]),
+    index: Schema.Number,
+    delta: Schema.Struct({
+      message: Schema.Struct({
+        tool_calls: Schema.Struct({
+          id: Schema.optional(Schema.String),
+          function: Schema.Struct({ name: Schema.optional(Schema.String), arguments: Schema.optional(Schema.String) }),
+        }),
+      }),
+    }),
+  }),
+  Schema.Struct({ type: Schema.Literal("tool-call-end"), index: Schema.Number }),
+  Schema.Struct({
+    type: Schema.Literal("message-end"),
+    delta: Schema.Struct({ finish_reason: Schema.String, usage: Schema.optional(NativeUsage) }),
+  }),
+  // Citation output is outside this basic chat surface.
+  Schema.Struct({ type: Schema.Literals(["citation-start", "citation-end"]) }),
+])
+type Event = typeof Event.Type
+type State = {
+  readonly lifecycle: Lifecycle.State
+  readonly tools: ToolStream.State<number>
+  readonly finished: boolean
+}
+
+const TOOL_CHOICE = { auto: undefined, none: "NONE", required: "REQUIRED", tool: "REQUIRED" } as const
+
+const fromRequest = Effect.fn("CohereChat.fromRequest")(function* (request: LLMRequest) {
+  const options = yield* ProviderShared.validateWith(Schema.decodeUnknownEffect(Options))(request.providerOptions ?? {})
+  const flattened = ProviderShared.flattenToolRequest(request)
+  const messages: (typeof Message.Type)[] = request.system.length
+    ? [{ role: "system", content: ProviderShared.joinText(request.system) }]
+    : []
+  for (const message of flattened.request.messages) {
+    if (message.role === "system") {
+      messages.push({ role: "user", content: (yield* ProviderShared.wrappedSystemUpdate("Cohere Chat", message)).text })
+      continue
+    }
+    if (message.role === "tool") {
+      for (const part of message.content) {
+        if (part.type !== "tool-result")
+          return yield* ProviderShared.unsupportedContent("Cohere Chat", "tool", ["tool-result"])
+        if (part.result.type === "content" && part.result.value.some((item) => item.type === "file"))
+          return yield* ProviderShared.invalidRequest("Cohere Chat does not support file content in tool results")
+        messages.push({ role: "tool", tool_call_id: part.id, content: ProviderShared.toolResultText(part) })
+      }
+      continue
+    }
+    const content: (typeof Content.Type)[] = []
+    const calls: (typeof ToolCall.Type)[] = []
+    const plans: string[] = []
+    for (const part of message.content) {
+      if (part.type === "text") {
+        content.push({ type: "text", text: part.text })
+        continue
+      }
+      if (message.role === "assistant" && part.type === "reasoning") {
+        if (part.providerMetadata?.cohere?.toolPlan === true) plans.push(part.text)
+        else content.push({ type: "thinking", thinking: part.text })
+        continue
+      }
+      if (message.role === "assistant" && part.type === "tool-call") {
+        const args = ProviderShared.encodeJson(part.input)
+        calls.push({ id: part.id, type: "function", function: { name: part.name, arguments: args } })
+        continue
+      }
+      if (message.role === "user" && part.type === "media" && part.media.mediaType.startsWith("image/")) {
+        const url =
+          ProviderShared.mediaUrl(part.media) ??
+          (yield* ProviderShared.requireInlineMedia("Cohere Chat", part.media)).dataUrl
+        content.push({ type: "image_url", image_url: { url } })
+        continue
+      }
+      return yield* ProviderShared.unsupportedContent(
+        "Cohere Chat",
+        message.role,
+        message.role === "user" ? ["text", "media"] : ["text", "reasoning", "tool-call"],
+      )
+    }
+    messages.push({
+      role: message.role,
+      content: content.length ? content : undefined,
+      tool_calls: calls.length ? calls : undefined,
+      tool_plan: plans.length ? plans.join("") : undefined,
+    })
+  }
+  const selected = request.toolChoice?.type === "tool" ? request.toolChoice.name : undefined
+  const tools = selected === undefined ? flattened.tools : flattened.tools.filter((tool) => tool.name === selected)
+  if (selected !== undefined && tools.length === 0)
+    return yield* ProviderShared.invalidRequest("Cohere Chat tool choice must name an available tool")
+  if (tools.some((tool) => tool.native !== undefined))
+    return yield* ProviderShared.invalidRequest("Cohere Chat does not support provider-defined tools")
+  return {
+    model: request.model.id,
+    messages,
+    stream: true as const,
+    tools: tools.length
+      ? tools.map((tool) => ({
+          type: "function" as const,
+          function: { name: tool.name, description: tool.description, parameters: tool.inputSchema },
+        }))
+      : undefined,
+    tool_choice: TOOL_CHOICE[request.toolChoice?.type ?? "auto"],
+    thinking: options.thinking && {
+      type: options.thinking.type ?? "enabled",
+      // Cohere rejects budgets above max_tokens; fitting also leaves room for the answer.
+      token_budget:
+        options.thinking.tokenBudget === undefined
+          ? undefined
+          : ProviderShared.fitThinkingBudget(options.thinking.tokenBudget, request.generation?.maxTokens),
+    },
+    max_tokens: request.generation?.maxTokens,
+    temperature: request.generation?.temperature,
+    p: request.generation?.topP,
+    k: request.generation?.topK,
+    seed: request.generation?.seed,
+    stop_sequences: request.generation?.stop,
+    frequency_penalty: request.generation?.frequencyPenalty,
+    presence_penalty: request.generation?.presencePenalty,
+  }
+})
+
+const finishReason = (raw: string): FinishReasonDetails => {
+  switch (raw) {
+    case "COMPLETE":
+    case "STOP_SEQUENCE":
+      return { normalized: "stop", raw }
+    case "MAX_TOKENS":
+      return { normalized: "length", raw }
+    case "TOOL_CALL":
+      return { normalized: "tool-calls", raw }
+    case "ERROR":
+    case "TIMEOUT":
+      return { normalized: "error", raw }
+    default:
+      return { normalized: "unknown", raw }
+  }
+}
+
+const mapUsage = (usage: typeof NativeUsage.Type) =>
+  new Usage({
+    inputTokens: usage.tokens?.input_tokens,
+    outputTokens: usage.tokens?.output_tokens,
+    nonCachedInputTokens: ProviderShared.subtractTokens(usage.tokens?.input_tokens, usage.cached_tokens),
+    cacheReadInputTokens: usage.cached_tokens,
+    reasoningTokens: usage.tokens?.reasoning_tokens,
+    totalTokens: ProviderShared.totalTokens(usage.tokens?.input_tokens, usage.tokens?.output_tokens, undefined),
+    providerMetadata: { cohere: usage },
+  })
+
+// Lifecycle deltas open blocks on demand and ends are no-ops for closed blocks, so content-start needs no handling.
+const step = Effect.fn("CohereChat.step")(function* (state: State, event: Event) {
+  const events: LLMEvent[] = []
+  switch (event.type) {
+    case "message-start":
+      return [{ ...state, lifecycle: Lifecycle.stepStart(state.lifecycle, events) }, events] as const
+    case "content-delta": {
+      const id = String(event.index)
+      const content = event.delta.message.content
+      const lifecycle =
+        content.thinking !== undefined
+          ? Lifecycle.reasoningDelta(state.lifecycle, events, id, content.thinking)
+          : Lifecycle.textDelta(state.lifecycle, events, id, content.text ?? "")
+      return [{ ...state, lifecycle }, events] as const
+    }
+    case "content-end": {
+      const id = String(event.index)
+      const lifecycle = Lifecycle.textEnd(Lifecycle.reasoningEnd(state.lifecycle, events, id), events, id)
+      return [{ ...state, lifecycle }, events] as const
+    }
+    case "tool-plan-delta": {
+      const plan = event.delta.message.tool_plan
+      const lifecycle = Lifecycle.reasoningDelta(state.lifecycle, events, "tool-plan", plan, {
+        cohere: { toolPlan: true },
+      })
+      return [{ ...state, lifecycle }, events] as const
+    }
+    case "tool-call-start":
+    case "tool-call-delta": {
+      const call = event.delta.message.tool_calls
+      const result = ToolStream.appendOrStart(
+        ADAPTER,
+        state.tools,
+        event.index,
+        { id: call.id, name: call.function.name, text: call.function.arguments ?? "" },
+        "Cohere tool call is missing id or name",
+      )
+      if (ToolStream.isError(result)) return yield* result
+      return [{ ...state, tools: result.tools }, result.events] as const
+    }
+    case "tool-call-end": {
+      const result = yield* ToolStream.finish(ADAPTER, state.tools, event.index)
+      return [{ ...state, tools: result.tools }, result.events ?? []] as const
+    }
+    case "message-end": {
+      const pending = yield* ToolStream.finishAll(ADAPTER, state.tools)
+      events.push(...pending.events)
+      const lifecycle = Lifecycle.finish(state.lifecycle, events, {
+        reason: finishReason(event.delta.finish_reason),
+        usage: event.delta.usage && mapUsage(event.delta.usage),
+      })
+      return [{ tools: pending.tools, lifecycle, finished: true }, events] as const
+    }
+    default:
+      return [state, events] as const
+  }
+})
+
+export const protocol = Protocol.make({
+  id: ADAPTER,
+  body: { schema: Body, from: fromRequest },
+  stream: {
+    event: Protocol.jsonEvent(Event),
+    initial: (): State => ({ lifecycle: Lifecycle.initial(), tools: ToolStream.empty(), finished: false }),
+    step,
+    terminal: (event) => event.type === "message-end",
+    onHalt: (state) =>
+      state.finished
+        ? Effect.succeed([])
+        : Effect.fail(ProviderShared.eventError(ADAPTER, "Cohere stream ended without message-end")),
+  },
+})
+export const route = Route.make({
+  id: ADAPTER,
+  provider: "cohere",
+  providerMetadataKey: "cohere",
+  protocol,
+  endpoint: Endpoint.path("/chat", { baseURL: DEFAULT_BASE_URL }),
+  framing: Framing.sse,
+})
+export * as CohereChat from "./cohere-chat.js"

packages/ai/src/protocols/index.ts

@@ -1,5 +1,6 @@
 export * as AnthropicMessages from "./anthropic-messages.js"
 export * as BedrockConverse from "./bedrock-converse.js"
+export * as CohereChat from "./cohere-chat.js"
 export * as Gemini from "./gemini.js"
 export * as MistralChat from "./mistral-chat.js"
 export * as OpenAIChat from "./openai-chat.js"

packages/ai/src/protocols/openai-chat.ts

@@ -14,7 +14,6 @@ import {
   ProviderInternalError,
   UnknownProviderError,
   Usage,
-  type FinishReason,
   type FinishReasonDetails,
   type CacheHint,
   type LLMRequest,
@@ -46,12 +45,6 @@ const OpenAIChatCacheControl = Schema.Struct({
 })
 type OpenAIChatCacheControl = Schema.Schema.Type<typeof OpenAIChatCacheControl>
 
-const OpenAIChatFunction = Schema.Struct({
-  name: Schema.String,
-  description: Schema.String,
-  parameters: JsonObject,
-})
-
 const OpenAIChatTool = Schema.Struct({
   type: Schema.tag("function"),
   function: Schema.Struct({

packages/ai/src/provider-error.ts

@@ -55,7 +55,13 @@ const patterns = [
 
 const payloadPatterns = [/request entity too large/i, /payload too large/i, /request too large/i]
 
-const exclusions = [/^(throttling error|service unavailable):/i, /rate limit/i, /too many requests/i]
+const exclusions = [
+  /^(throttling error|service unavailable):/i,
+  /rate limit/i,
+  /too many requests/i,
+  // Cohere reports an output limit above the model maximum as "too many tokens"; compaction cannot fix it.
+  /max[_ ]tokens must be less than/i,
+]
 
 export const isContextOverflow = (message: string) =>
   !exclusions.some((pattern) => pattern.test(message)) &&

packages/ai/src/providers/cohere.ts

@@ -0,0 +1,66 @@
+import { CohereChat } from "../protocols/cohere-chat.js"
+import { OpenAIChat } from "../protocols/openai-chat.js"
+import { Route, type RouteDefaultsInput } from "../route/client.js"
+import { Endpoint } from "../route/endpoint.js"
+import { AuthOptions, type ProviderAuthOption } from "../route/auth-options.js"
+import { ProviderID, type ModelID, type OpenString } from "../schema/index.js"
+import type { ProviderPackage } from "../provider-package.js"
+
+export const id = ProviderID.make("cohere")
+const COMPATIBILITY_BASE_URL = "https://api.cohere.ai/compatibility/v1"
+export type ChatOptionsInput = { readonly reasoningEffort?: OpenString<"none" | "high"> }
+export type ProviderOptions = CohereChat.ProviderOptionsInput & ChatOptionsInput
+export type LanguageModelOptions = Omit<RouteDefaultsInput, "providerOptions"> &
+  ProviderAuthOption<"optional"> & {
+    readonly baseURL?: string
+    readonly providerOptions?: ProviderOptions
+  }
+export type Settings<Options = CohereChat.ProviderOptionsInput> = ProviderPackage.Settings &
+  Options & { readonly apiKey?: string; readonly baseURL?: string }
+
+export const route = CohereChat.route
+export const chatRoute = Route.make({
+  id: "cohere-chat-completions",
+  provider: id,
+  providerMetadataKey: "cohere",
+  protocol: OpenAIChat.protocol,
+  endpoint: Endpoint.path("/chat/completions", { baseURL: COMPATIBILITY_BASE_URL }),
+  framing: OpenAIChat.framing,
+})
+export const routes = [route, chatRoute]
+
+export const configure = (input: LanguageModelOptions = {}) => {
+  const { apiKey: _apiKey, auth: _auth, baseURL, ...defaults } = input
+  const auth = AuthOptions.bearer(input, "COHERE_API_KEY")
+  const native = route.with({ ...defaults, auth, endpoint: { baseURL: baseURL ?? CohereChat.DEFAULT_BASE_URL } })
+  const chat = chatRoute.with({ ...defaults, auth, endpoint: { baseURL: baseURL ?? COMPATIBILITY_BASE_URL } })
+  return {
+    id,
+    model: (modelID: string | ModelID) => native.model<CohereChat.ProviderOptionsInput>({ id: modelID }),
+    chat: (modelID: string | ModelID) =>
+      chat.model<ChatOptionsInput>({
+        id: modelID,
+        compatibility: {
+          maxTokensField: "max_tokens",
+          supportsStore: false,
+          supportsUsageInStreaming: true,
+          reasoningField: "reasoning_content",
+          supportsStrictMode: false,
+        },
+      }),
+    configure,
+  }
+}
+export const provider = configure()
+export const model: ProviderPackage.Definition<Settings, CohereChat.ProviderOptionsInput>["model"] = (
+  modelID,
+  { apiKey, baseURL, body, headers, ...providerOptions },
+) =>
+  configure({
+    apiKey,
+    baseURL,
+    headers,
+    http: body === undefined ? undefined : { body: { ...body } },
+    providerOptions,
+  }).model(modelID)
+export * as Cohere from "./cohere.js"

packages/ai/src/providers/cohere/chat.ts

@@ -0,0 +1,16 @@
+import type { ProviderPackage } from "../../provider-package.js"
+import { Cohere } from "../cohere.js"
+
+export type Settings = Cohere.Settings<Cohere.ChatOptionsInput>
+
+export const model: ProviderPackage.Definition<Settings, Cohere.ChatOptionsInput>["model"] = (
+  modelID,
+  { apiKey, baseURL, body, headers, ...providerOptions },
+) =>
+  Cohere.configure({
+    apiKey,
+    baseURL,
+    headers,
+    http: body === undefined ? undefined : { body: { ...body } },
+    providerOptions,
+  }).chat(modelID)

packages/ai/src/providers/index.ts

@@ -9,6 +9,7 @@ export * as Baseten from "./baseten.js"
 export * as BlackForestLabs from "./black-forest-labs.js"
 export * as Cartesia from "./cartesia.js"
 export * as Cerebras from "./cerebras.js"
+export * as Cohere from "./cohere.js"
 export * as CloudflareAIGateway from "./cloudflare-ai-gateway.js"
 export * as CloudflareWorkersAI from "./cloudflare-workers-ai.js"
 export * as DeepInfra from "./deepinfra.js"

packages/ai/src/route/executor.ts

@@ -159,6 +159,15 @@ const nativeTransportFailure = (error: unknown) => {
   return failure
 }
 
+// HTTP hooks re-wrap response bodies, so a read failure can arrive as an HttpClientError caused by
+// another HttpClientError. The innermost cause carries the native failure.
+const rootCause = (error: unknown): unknown =>
+  HttpClientError.isHttpClientError(error) && "cause" in error.reason && error.reason.cause !== undefined
+    ? rootCause(error.reason.cause)
+    : error
+
+const CONNECTION_LOST = "Connection lost while reading the response"
+
 const httpError = (input: {
   readonly error: unknown
   readonly request: HttpClientRequest.HttpClientRequest
@@ -179,20 +188,21 @@ const httpError = (input: {
       }),
     })
 
-  const source =
-    HttpClientError.isHttpClientError(input.error) && "cause" in input.error.reason
-      ? (input.error.reason.cause ?? input.error)
-      : input.error
+  const source = rootCause(input.error)
   const native = nativeTransportFailure(source)
   const code = native?.code
-  const raw = native?.message ?? (input.error instanceof Error ? input.error.message : undefined)
-  const detail = raw
-  const message = code && detail && !detail.includes(code) ? `${code}: ${detail}` : detail
+  const detail =
+    code && native?.message && !native.message.includes(code) ? `${code}: ${native.message}` : native?.message
+  const message = detail ?? (input.error instanceof Error ? input.error.message : undefined)
 
   if (Cause.isTimeoutError(input.error) || Cause.isTimeoutError(source))
     return transportError({ message: message ?? "HTTP transport timed out", code: code ?? "Timeout" })
   if (!HttpClientError.isHttpClientError(input.error))
     return transportError({ message: message ?? "HTTP transport failed", code })
+  // Effect reports every response body read failure as a DecodeError, but the raw byte stream decodes
+  // nothing: provider output parsing happens later and fails as InvalidProviderOutput.
+  if (input.operation === "read" && input.error.reason._tag === "DecodeError")
+    return transportError({ message: detail ? `${CONNECTION_LOST}: ${detail}` : CONNECTION_LOST, code })
   if (input.error.reason._tag === "TransportError") {
     return transportError({
       message: message ?? input.error.reason.description ?? "HTTP transport failed",

packages/ai/src/route/transport/http.ts

@@ -1,11 +1,19 @@
-import { Effect } from "effect"
+import { Clock, Duration, Effect, Stream } from "effect"
 import { Headers, HttpClientRequest } from "effect/unstable/http"
 import { Auth } from "../auth.js"
 import { render as renderEndpoint } from "../endpoint.js"
 import { Framing } from "../framing.js"
 import type { HttpMiddleware, Transport, TransportPrepareInput } from "./index.js"
 import * as ProviderShared from "../../protocols/shared.js"
-import { mergeJsonRecords, type LLMRequest } from "../../schema/index.js"
+import {
+  AIError,
+  DEFAULT_HTTP_TIMEOUT_MS,
+  mergeJsonRecords,
+  TransportError,
+  type HttpContext,
+  type HttpTimeout,
+  type LLMRequest,
+} from "../../schema/index.js"
 import { RequestExecutor } from "../executor.js"
 
 export type JsonRequestInput<Body> = TransportPrepareInput<Body>
@@ -87,17 +95,53 @@ export const httpJson = <Body, Frame>(input: HttpJsonInput<Body, Frame>): HttpJs
         middleware: prepareInput.middleware,
       }
     }),
-  execute: (prepared, _request, runtime) =>
+  execute: (prepared, request, runtime) =>
     Effect.gen(function* () {
-      const response = yield* runtime.http.execute(prepared.request, prepared.middleware)
+      const timeout = (operation: "request" | "read", message: string, http?: HttpContext) =>
+        new AIError({
+          reason: new TransportError({
+            message,
+            transport: "http",
+            operation,
+            code: "Timeout",
+            url: prepared.request.url,
+            http,
+          }),
+        })
+      const started = yield* Clock.currentTimeMillis
+      // Unlike the header and chunk limits, the whole-request budget has no default.
+      const total = request.http?.timeout ? Duration.millis(request.http.timeout) : Duration.infinity
+      const response = yield* runtime.http.execute(prepared.request, prepared.middleware).pipe(
+        Effect.timeoutOrElse({
+          duration: Duration.min(timeoutDuration(request.http?.headerTimeout), total),
+          orElse: () => timeout("request", "Timed out waiting for response headers"),
+        }),
+      )
+      const http = RequestExecutor.responseHttp(response)
+      const remaining = Duration.subtract(total, Duration.millis((yield* Clock.currentTimeMillis) - started))
       return {
-        frames: prepared.framing.frame(RequestExecutor.responseStream(response)),
-        http: RequestExecutor.responseHttp(response),
+        frames: prepared.framing.frame(
+          RequestExecutor.responseStream(response).pipe(
+            Stream.timeoutOrElse({
+              duration: timeoutDuration(request.http?.chunkTimeout),
+              orElse: () => Stream.fail(timeout("read", "Timed out waiting for response data", http)),
+            }),
+            Stream.interruptWhen(
+              Effect.sleep(remaining).pipe(
+                Effect.andThen(Effect.fail(timeout("read", "Timed out waiting for the response to complete", http))),
+              ),
+            ),
+          ),
+        ),
+        http,
         body: prepared.framing.body,
       }
     }),
 })
 
+const timeoutDuration = (value: HttpTimeout | undefined) =>
+  value === false ? Duration.infinity : Duration.millis(value ?? DEFAULT_HTTP_TIMEOUT_MS)
+
 export const sseJson = {
   id: "http-json/sse",
   with: <Body>() => httpJson<Body, string>({ framing: Framing.sse }),

packages/ai/src/schema/options.ts

@@ -48,10 +48,23 @@ export const mergeProviderOptions = (
   ...items: ReadonlyArray<ProviderOptions | undefined>
 ): ProviderOptions | undefined => mergeJsonRecords(...items)
 
+/** Milliseconds for an HTTP timeout, or `false` to disable it. */
+export const HttpTimeout = Schema.Union([Schema.Number.check(Schema.isGreaterThan(0)), Schema.Literal(false)])
+export type HttpTimeout = Schema.Schema.Type<typeof HttpTimeout>
+
+/** Applied to `headerTimeout` and `chunkTimeout` when a request leaves them unset. */
+export const DEFAULT_HTTP_TIMEOUT_MS = 300_000
+
 export class HttpOptions extends Schema.Class<HttpOptions>("AI.HttpOptions")({
   body: Schema.optional(JsonSchema),
   headers: Schema.optional(Schema.Record(Schema.String, Schema.String)),
   query: Schema.optional(Schema.Record(Schema.String, Schema.String)),
+  /** Time allowed for the whole request, from send until the response completes. Unbounded when unset. */
+  timeout: Schema.optional(HttpTimeout),
+  /** Time allowed for response headers to arrive. */
+  headerTimeout: Schema.optional(HttpTimeout),
+  /** Time allowed between streamed response chunks once headers have arrived. */
+  chunkTimeout: Schema.optional(HttpTimeout),
 }) {}
 
 export namespace HttpOptions {
@@ -70,8 +83,12 @@ export const mergeHttpOptions = (...items: ReadonlyArray<HttpOptions | undefined
   const body = mergeJsonRecords(...items.map((item) => item?.body))
   const headers = mergeStringRecords(...items.map((item) => item?.headers))
   const query = mergeStringRecords(...items.map((item) => item?.query))
-  if (!body && !headers && !query) return undefined
-  return new HttpOptions({ body, headers, query })
+  const timeout = items.findLast((item) => item?.timeout !== undefined)?.timeout
+  const headerTimeout = items.findLast((item) => item?.headerTimeout !== undefined)?.headerTimeout
+  const chunkTimeout = items.findLast((item) => item?.chunkTimeout !== undefined)?.chunkTimeout
+  if (!body && !headers && !query && timeout === undefined && headerTimeout === undefined && chunkTimeout === undefined)
+    return undefined
+  return new HttpOptions({ body, headers, query, timeout, headerTimeout, chunkTimeout })
 }
 
 export class GenerationOptions extends Schema.Class<GenerationOptions>("LLM.GenerationOptions")({

packages/ai/test/cache-policy.test.ts

@@ -145,6 +145,59 @@ describe("applyCachePolicy", () => {
     }),
   )
 
+  it.effect("Alibaba chat caches the system and conversation tail without marking tools", () =>
+    Effect.gen(function* () {
+      const prepared = yield* compileRequest(
+        LLM.request({
+          model: Alibaba.configure({ region: "ap-southeast-1", apiKey: "test" }).chat("qwen3.8-max"),
+          system: "You are concise.",
+          tools: [{ name: "lookup", description: "Look up a value", inputSchema: { type: "object", properties: {} } }],
+          prompt: "hi",
+        }),
+      )
+
+      expect(prepared.body).toMatchObject({
+        tools: [{ type: "function", function: { name: "lookup" } }],
+        messages: [
+          {
+            role: "system",
+            content: [{ text: "You are concise.", cache_control: { type: "ephemeral" } }],
+          },
+          { role: "user", content: [{ text: "hi", cache_control: { type: "ephemeral" } }] },
+        ],
+      })
+      expect(prepared.body.tools?.[0]?.cache_control).toBeUndefined()
+    }),
+  )
+
+  it.effect("Alibaba chat omits automatic cache markers when cache is none", () =>
+    Effect.gen(function* () {
+      const prepared = yield* compileRequest(
+        LLM.request({
+          model: Alibaba.configure({ region: "ap-southeast-1", apiKey: "test" }).chat("qwen3.8-max"),
+          system: "You are concise.",
+          prompt: "hi",
+          cache: "none",
+        }),
+      )
+
+      expect(JSON.stringify(prepared.body)).not.toContain("cache_control")
+    }),
+  )
+
+  it.effect("Alibaba chat does not assume non-Qwen models support cache markers", () =>
+    Effect.gen(function* () {
+      const alibaba = Alibaba.configure({ region: "ap-southeast-1", apiKey: "test" })
+      for (const modelID of ["kimi-k3", "glm-5.2", "deepseek-v4-flash-0731", "MiniMax-M2.5"]) {
+        const prepared = yield* compileRequest(
+          LLM.request({ model: alibaba.chat(modelID), system: "You are concise.", prompt: "hi" }),
+        )
+
+        expect(JSON.stringify(prepared.body)).not.toContain("cache_control")
+      }
+    }),
+  )
+
   it.effect("'auto' emits Anthropic cache markers on Anthropic-compatible routes", () =>
     Effect.gen(function* () {
       const prepared = yield* compileRequest(

packages/ai/test/executor.test.ts

@@ -1,11 +1,17 @@
 import { describe, expect } from "bun:test"
 import { Deferred, Effect, Fiber, Layer, Ref, Stream } from "effect"
-import { Headers, HttpClientError, HttpClientRequest } from "effect/unstable/http"
-import { LLM, AIError, HttpContext, InvalidProviderOutputError, TransportError } from "../src/index.js"
-import { LLMClient, RequestExecutor, WebSocketTransport, type WebSocketChannelExecutor } from "../src/route.js"
+import { Headers, HttpClientError, HttpClientRequest, HttpClientResponse } from "effect/unstable/http"
+import { LLM, AIError, HttpContext, InvalidProviderOutputError, TransportError, isRetryable } from "../src/index.js"
+import {
+  LLMClient,
+  RequestExecutor,
+  WebSocketTransport,
+  type HttpMiddleware,
+  type WebSocketChannelExecutor,
+} from "../src/route.js"
 import { route } from "../src/protocols/openai-chat.js"
 import { configure } from "../src/providers/openai.js"
-import { dynamicResponse, fixedResponse, handlerLayer, systemError } from "./lib/http.js"
+import { dynamicResponse, fixedResponse, handlerLayer, systemError, truncatedStream } from "./lib/http.js"
 import { deltaChunk } from "./lib/openai-chunks.js"
 import { sseEvents, sseRaw } from "./lib/sse.js"
 import { it } from "./lib/effect.js"
@@ -18,6 +24,8 @@ const secretRequest = HttpClientRequest.post("https://provider.test/v1/chat?api_
   HttpClientRequest.setHeaders(Headers.fromInput({ authorization: "Bearer header-secret-456" })),
 )
 
+const sseRequest = HttpClientRequest.post("https://provider.test/v1/messages")
+
 const expectAIError = (error: unknown) => {
   expect(error).toBeInstanceOf(AIError)
   if (!(error instanceof AIError)) throw new Error("expected AIError")
@@ -93,7 +101,9 @@ describe("RequestExecutor", () => {
       const error = yield* RequestExecutor.stream(executor, secretRequest).pipe(Stream.runDrain, Effect.flip)
 
       expectAIError(error)
-      expect(error.message).toBe("ECONNRESET: disconnected query-secret-123 header-secret-456")
+      expect(error.message).toBe(
+        "Connection lost while reading the response: ECONNRESET: disconnected query-secret-123 header-secret-456",
+      )
       expect(error.reason.http).toMatchObject({ status: 200, url: secretRequest.url })
       expect(error.reason.cause).toMatchObject({ code: "ECONNRESET" })
       expect(error.reason).toMatchObject({
@@ -123,7 +133,7 @@ describe("RequestExecutor", () => {
       const error = yield* RequestExecutor.stream(executor, secretRequest).pipe(Stream.runDrain, Effect.flip)
 
       expectAIError(error)
-      expect(error.message).toBe("ECONNRESET: socket closed")
+      expect(error.message).toBe("Connection lost while reading the response: ECONNRESET: socket closed")
       expect(error.reason.cause).toBeInstanceOf(TypeError)
       expect(error.reason).toMatchObject({
         _tag: "Transport",
@@ -144,6 +154,54 @@ describe("RequestExecutor", () => {
     ),
   )
 
+  it.effect("reports a connection lost mid-stream through middleware that re-wraps the body", () =>
+    Effect.gen(function* () {
+      const executor = yield* RequestExecutor.Service
+      const chunks: Array<Uint8Array> = []
+      // Session HTTP hooks hand plugins a web Response, so the body is re-wrapped around the original stream.
+      const rewrap: HttpMiddleware = (input, handler) =>
+        Effect.gen(function* () {
+          const response = yield* handler(input)
+          const body = yield* Stream.toReadableStreamEffect(response.stream)
+          return HttpClientResponse.fromWeb(
+            input,
+            new Response(body, { status: response.status, headers: response.headers }),
+          )
+        })
+      const error = yield* RequestExecutor.stream(executor, sseRequest, rewrap).pipe(
+        Stream.runForEach((chunk) => Effect.sync(() => chunks.push(chunk))),
+        Effect.flip,
+      )
+
+      expectAIError(error)
+      expect(new TextDecoder().decode(chunks[0])).toBe('data: {"type":"ping"}\n\n')
+      expect(error.message).toBe("Connection lost while reading the response: ECONNRESET: other side closed")
+      expect(error.reason.cause).toBeInstanceOf(TypeError)
+      expect(error.reason.http).toMatchObject({ status: 200 })
+      expect(error.reason).toMatchObject({ _tag: "Transport", operation: "read", code: "ECONNRESET" })
+      expect(isRetryable(error)).toBeTrue()
+    }).pipe(
+      Effect.provide(
+        truncatedStream(
+          ['data: {"type":"ping"}\n\n'],
+          new TypeError("terminated", { cause: systemError("ECONNRESET", "other side closed") }),
+        ),
+      ),
+    ),
+  )
+
+  it.effect("does not report a body read failure without a native cause as a decode error", () =>
+    Effect.gen(function* () {
+      const executor = yield* RequestExecutor.Service
+      const error = yield* RequestExecutor.stream(executor, sseRequest).pipe(Stream.runDrain, Effect.flip)
+
+      expectAIError(error)
+      expect(error.message).toBe("Connection lost while reading the response")
+      expect(error.reason).toMatchObject({ _tag: "Transport", operation: "read", code: undefined })
+      expect(isRetryable(error)).toBeTrue()
+    }).pipe(Effect.provide(truncatedStream(['data: {"type":"ping"}\n\n'], new DOMException("aborted", "AbortError")))),
+  )
+
   it.effect("preserves middleware error messages", () =>
     Effect.gen(function* () {
       const executor = yield* RequestExecutor.Service

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-7-plus-streams-thinking-disabled.json

@@ -10,7 +10,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-7-plus-streams-thinking-disabled",
-    "recordedAt": "2026-09-08T03:10:42.782Z"
+    "recordedAt": "2026-10-02T01:23:37.836Z"
   },
   "interactions": [
     {
@@ -21,14 +21,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.7-plus\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_completion_tokens\":4096,\"enable_thinking\":false}"
+        "body": "{\"model\":\"qwen3.7-plus\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_completion_tokens\":4096,\"enable_thinking\":false}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
-        "body": "data: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-047bcb67-b193-9a4f-9d77-ea0325be6d7c\",\"created\":1788837041,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-047bcb67-b193-9a4f-9d77-ea0325be6d7c\",\"choices\":[{\"delta\":{\"content\":\"3\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837041,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-047bcb67-b193-9a4f-9d77-ea0325be6d7c\",\"choices\":[{\"delta\":{\"content\":\"7887\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837041,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-047bcb67-b193-9a4f-9d77-ea0325be6d7c\",\"choices\":[{\"delta\":{\"content\":\"\"},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1788837041,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1788837041,\"id\":\"chatcmpl-047bcb67-b193-9a4f-9d77-ea0325be6d7c\",\"model\":\"qwen3.7-plus\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":5,\"prompt_tokens\":32,\"prompt_tokens_details\":{\"cached_tokens\":0,\"text_tokens\":32},\"total_tokens\":37}}\n\ndata: [DONE]\n\n"
+        "body": "data: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-e96a3356-bec9-98ad-bdbe-af00a15ee965\",\"created\":1790904216,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-e96a3356-bec9-98ad-bdbe-af00a15ee965\",\"choices\":[{\"delta\":{\"content\":\"3\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904216,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-e96a3356-bec9-98ad-bdbe-af00a15ee965\",\"choices\":[{\"delta\":{\"content\":\"7887\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904216,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-e96a3356-bec9-98ad-bdbe-af00a15ee965\",\"choices\":[{\"delta\":{\"content\":\"\"},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1790904216,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1790904216,\"id\":\"chatcmpl-e96a3356-bec9-98ad-bdbe-af00a15ee965\",\"model\":\"qwen3.7-plus\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":5,\"prompt_tokens\":32,\"prompt_tokens_details\":{\"cache_creation\":{\"ephemeral_5m_input_tokens\":0},\"cache_creation_input_tokens\":0,\"cache_type\":\"ephemeral\",\"cache_write_tokens\":0,\"cached_tokens\":0,\"text_tokens\":32},\"total_tokens\":37}}\n\ndata: [DONE]\n\n"
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-7-plus-streams-thinking-enabled.json

@@ -10,7 +10,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-7-plus-streams-thinking-enabled",
-    "recordedAt": "2026-09-08T03:10:54.099Z"
+    "recordedAt": "2026-10-02T01:23:43.998Z"
   },
   "interactions": [
     {
@@ -21,14 +21,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.7-plus\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_completion_tokens\":4096,\"enable_thinking\":true,\"thinking_budget\":1024}"
+        "body": "{\"model\":\"qwen3.7-plus\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_completion_tokens\":4096,\"enable_thinking\":true,\"thinking_budget\":1024}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
-        "body": "data: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"Thinking\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" Process:\\n\\n1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\".  **Ident\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"ify the core question\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\":** The user wants\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" to know the product\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" of \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"173 and\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 219\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\".\\n2.\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"  **Identify\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" the constraint:** The\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" response must contain *\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"only\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-ec928416-c99b-9f46-9805-cbb37bd7c499\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"* the final integer\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837042,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"cLine truncated
+        "body": "data: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"Thinking\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" Process:\\n\\n1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\".  Identify\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" the core\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" question: Calculate \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"173 *\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 219\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\".\\n2.\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"  Constraint: Reply\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" with *\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"only* the final\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" integer.\\n3\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\".  Perform the\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" multiplication:\\n\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fe-9ee8-a442-7a3881697fdf\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"    *   \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904218,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.7-plus\",\"id\":\"chatcmpl-70ed9ebc-62fLine truncated
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-flash-reads-image-bytes.json

@@ -1,9 +1,15 @@
 {
   "version": 1,
   "metadata": {
-    "tags": ["prefix:alibaba-chat", "provider:alibaba", "protocol:alibaba-chat", "region:ap-southeast-1", "image"],
+    "tags": [
+      "prefix:alibaba-chat",
+      "provider:alibaba",
+      "protocol:alibaba-chat",
+      "region:ap-southeast-1",
+      "image"
+    ],
     "name": "alibaba-chat/qwen-3-8-flash-reads-image-bytes",
-    "recordedAt": "2026-09-08T03:10:55.585Z"
+    "recordedAt": "2026-10-02T01:23:45.179Z"
   },
   "interactions": [
     {
@@ -14,14 +20,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-flash\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Read the three words in this image. Reply with only the words in order.\"},{\"type\":\"image_url\",\"image_url\":{\"url\":\"data:image/png;base64,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 truncated
+        "body": "{\"model\":\"qwen3.8-flash\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Read the three words in this image. Reply with only the words in order.\",\"cache_control\":{\"type\":\"ephemeral\"}},{\"type\":\"image_url\",\"image_url\":{\"url\":\"data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAnYAAACKCAYAAAAnmweyAAACKWlUWHRYTUw6Y29tLmFkb2JlLnhtcAAAAAAAPD94cGFja2V0IGJlZ2luPSLvu78iIGlkPSJXNU0wTXBDZWhpSHpyZVN6TlRjemtjOWQiPz4KPHg6eG1wbWV0YSB4bWxuczp4PSJhZG9iZTpuczptZXRhLyIgeDp4bXB0az0iWE1QIENvcmUgNi4wLjAiPgogPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4KICA8cmRmOkRlc2NyaXB0aW9uIHJkZjphYm91dD0iIgogICAgeG1sbnM6ZXhpZj0iaHR0cDovL25zLmFkb2JlLmNvbS9leGlmLzEuMC8iCiAgICB4bWxuczp0aWZmPSJodHRwOi8vbnMuYWRvYmUuY29tL3RpZmYvMS4wLyIKICAgZXhpZjpQaXhlbFhEaW1lbnNpb249IjYzMCIKICAgZXhpZjpVc2VyQ29tbWVudD0iU2NyZWVuc2hvdCIKICAgZXhpZjpQaXhlbFlEaW1lbnNpb249IjEzOCIKICAgdGlmZjpZUmVzb2x1dGlvbj0iMTQ0LzEiCiAgIHRpZmY6WFJlc29sdXRpb249IjE0NC8xIgogICB0aWZmOlJlc29sdXRpb25Vbml0PSIyIi8+CiA8L3JkZjpSREY+CjwveDp4bXBtZXRhPgo8P3hwYWNrZXQgZW5kPSJyIj8+at0SpgAACrhpQ0NQSUNDIFByb2ZpbGUAAEiJlZcHUFNZF8fvey+dhJYQASmh994CSAmhBVCQDjZCEiAQQkxBwa4sruBaUBHBsqKrIgo2qg0RxbYo9r4gi4iyLhZsqHwPGMLufvN933xn5s75zXnn/u+5d959cx4AFFOuRCKC1QHIFsul0SEBjMSkZAb+JcACTUACnoDK5ckkrKioCIDahP+7fbgLoFF/y25U69+f/1fT4AtkPACgKJRT+TJeNsonAIABTyKVA4CgDEwWyCWjfB9lmhQtEOWBUU4fY8yoDi11nGljObHRbJQtASCQuVxpOgBkVzTOyOWlozrkWJQdxXyhGOUClH2zs3P4KLehbInmSFAe1Wem/kUn/W+aqUpNLjddyeN7GTNCoFAmEXHz/s/j+N+WLVJMrGGBDnKGNDQa9Xrouf2elROuZHHqjMgJFvLH8sc4QxEaN8E8GTt5gmWiGM4E87mB4Uod0YyICU4TBitzhHJO7AQLZEExEyzNiVaumyZlsyaYK52sQZEVp4xnCDhK/fyM2IQJzhXGz1DWlhUTPpnDVsalimjlXgTikIDJdYOV55At+8vehRzlXHlGbKjyHLiT9QvErElNWaKyNr4gMGgyJ06ZL5EHKNeSiKKU+QJRiDIuy41RzpWjL+fk3CjlGWZyw6ImGMQAOVAAPhCCHMAAgaiXAQkQAS7IkwsWykc3xM6R5EmF6RlyBgu9dQIGR8yzt2U4Ozq7AzB6h8dfkXf0sbsJ0a9MxlZVAeDTNDIycnIyFnYDgKMpAJDqJmOWcwBQ7wPg0imeQpo7Hhu7a1j0y6AGaEAHGAATYAnsgDNwB97AHwSBMBAJYkESmAt4IANkAylYABaDFaAQFIMNYAsoB7vAHnAAHAbHQAM4Bc6Bi+AquAHugEegC/SCV2AQfADDEAThIQpEhXQgQ8gMsoGcISbkCwVBEVA0lASlQOmQGFJAi6FVUDFUApVDu6Eq6CjUBJ2DLkOd0AOoG+qH3kJfYAQmwzRYHzaHHWAmzILD4Vh4DpwOz4fz4QJ4HVwGV8KH4Hr4HHwVvgN3wa/gIQQgKggdMULsECbCRiKRZCQNkSJLkSKkFKlEapBmpB25hXQhA8hnDA5DxTAwdhhvTCgmDsPDzMcsxazFlGMOYOoxbZhbmG7MIOY7loLVw9pgvbAcbCI2HbsAW4gtxe7D1mEvYO9ge7EfcDgcHWeB88CF4pJwmbhFuLW4HbhaXAuuE9eDG8Lj8Tp4G7wPPhLPxcvxhfht+EP4s/ib+F78J4IKwZDgTAgmJBPEhJWEUsJBwhnCTUIfYZioTjQjehEjiXxiHnE9cS+xmXid2EscJmmQLEg+pFhSJmkFqYxUQ7pAekx6p6KiYqziqTJTRaiyXKVM5YjKJZVulc9kTbI1mU2eTVaQ15H3k1vID8jvKBSKOcWfkkyRU9ZRqijnKU8pn1SpqvaqHFW+6jLVCtV61Zuqr9WIamZqLLW5avlqpWrH1a6rDagT1c3V2epc9aXqFepN6vfUhzSoGk4akRrZGms1Dmpc1nihidc01wzS5GsWaO7RPK/ZQ0WoJlQ2lUddRd1LvUDtpeFoFjQOLZNWTDtM66ANamlquWrFay3UqtA6rdVFR+jmdA5dRF9PP0a/S/8yRX8Ka4pgypopNVNuTvmoPVXbX1ugXaRdq31H+4sOQydIJ0tno06DzhNdjK617kzdBbo7dS/oDkylTfWeyptaNPXY1Id6sJ61XrTeIr09etf0hvQN9EP0Jfrb9M/rDxjQDfwNMg02G5wx6DekGvoaCg03G541fMnQYrAYIkYZo40xaKRnFGqkMNpt1GE0bGxhHGe80rjW+IkJyYRpkmay2aTVZNDU0HS66WLTatOHZkQzplmG2VazdrOP5hbmCearzRvMX1hoW3As8i2qLR5bUiz9LOdbVlretsJZMa2yrHZY3bCGrd2sM6wrrK/bwDbuNkKbHTadtlhbT1uxbaXtPTuyHcsu167artuebh9hv9K+wf61g6lDssNGh3aH745ujiLHvY6PnDSdwpxWOjU7vXW2duY5VzjfdqG4BLssc2l0eeNq4ypw3el6343qNt1ttVur2zd3D3epe417v4epR4rHdo97TBozirmWeckT6xnguczzlOdnL3cvudcxrz+97byzvA96v5hmMU0wbe+0Hh9jH67Pbp8uX4Zviu/Pvl1+Rn5cv0q/Z/4m/nz/ff59LCtWJusQ63WAY4A0oC7gI9uLvYTdEogEhgQWBXYEaQbFBZUHPQ02Dk4Prg4eDHELWRTSEooNDQ/dGHqPo8/hcao4g2EeYUvC2sLJ4THh5eHPIqwjpBHN0+HpYdM3TX88w2yGeEZDJIjkRG6KfBJlETU/6uRM3MyomRUzn0c7RS+Obo+hxsyLORjzITYgdn3sozjLOEVca7xa/Oz4qviPCYEJJQldiQ6JSxKvJukmCZMak/HJ8cn7kodmBc3aMqt3ttvswtl351jMWTjn8lzduaK5p+epzePOO56CTUlIOZjylRvJreQOpXJSt6cO8ti8rbxXfH/+Zn6/wEdQIuhL80krSXuR7pO+Kb0/wy+jNGNAyBaWC99khmbuyvyYFZm1P2tElCCqzSZkp2Q3iTXFWeK2HIOchTmdEhtJoaRrvtf8LfMHpeHSfTJINkfWKKehzdI1haXiB0V3rm9uRe6nBfELji/UWCheeC3POm9NXl9+cP4vizCLeItaFxstXrG4ewlrye6l0NLUpa3LTJYVLOtdHrL8wArSiqwVv650XFmy8v2qhFXNBfoFywt6fgj5obpQtVBaeG+19+pdP2J+FP7YscZlzbY134v4RVeKHYtLi7+u5a298pPTT2U/jaxLW9ex3n39zg24DeINdzf6bTxQolGSX9Kzafqm+s2MzUWb32+Zt+VyqWvprq2krYqtXWURZY3bTLdt2Pa1PKP8TkVARe12ve1rtn/cwd9xc6f/zppd+ruKd335Wfjz/d0hu+srzStL9+D25O55vjd+b/svzF+q9unuK973bb94f9eB6ANtVR5VVQf1Dq6vhqsV1f2HZh+6cTjwcGONXc3uWnpt8RFwRHHk5dGUo3ePhR9rPc48XnPC7MT2OmpdUT1Un1c/2JDR0NWY1NjZFNbU2uzdXHfS/uT+U0anKk5rnV5/hnSm4MzI2fyzQy2SloFz6ed6Wue1PjqfeP5228y2jgvhFy5dDL54vp3VfvaSz6VTl70uN11hXmm46n61/prbtbpf3X6t63DvqL/ucb3xhueN5s5pnWdu+t08dyvw1sXbnNtX78y403k37u79e7Pvdd3n33/xQPTgzcPch8OPlj/GPi56ov6k9Kne08rfrH6r7XLvOt0d2H3tWcyzRz28nle/y37/2lvwnPK8tM+wr+qF84tT/cH9N17Oetn7SvJqeKDwD40/tr+2fH3iT/8/rw0mDva+kb4Zebv2nc67/e9d37cORQ09/ZD9Yfhj0SedTwc+Mz+3f0n40je84Cv+a9k3q2/N38O/Px7JHhmRcKXcsVYAQQeclgbA2/0AUJIAoKI9BGnWeI89ZtD4f8EYgf/E4334mKGdSw3qRtsjdgsAR9BhvhwANX8ARlujWH8Au7gox0Q/PNa7jxoO/Yup8UK0Vjk9ta0C/7Txvv4vdf/TA6Xq3/y/AOOhDyne6KAWAAAAimVYSWZNTQAqAAAACAAEARoABQAAAAEAAAA+ARsABQAAAAEAAABGASgAAwAAAAEAAgAAh2kABAAAAAEAAABOAAAAAAAAAJAAAAABAAAAkAAAAAEAA5KGAAcAAAASAAAAeKACAAQAAAABAAACdqADAAQAAAABAAAAigAAAABBU0NJSQAAAFNjAAAAAAAAAADxh4F4AAAAHGlET1QAAAACLine truncated
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
-        "body": "data: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-2952c591-6e41-90ec-81ca-894b8e84f0aa\",\"created\":1788837054,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-2952c591-6e41-90ec-81ca-894b8e84f0aa\",\"choices\":[{\"delta\":{\"content\":\"j\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837054,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-2952c591-6e41-90ec-81ca-894b8e84f0aa\",\"choices\":[{\"delta\":{\"content\":\"iggling restroom prison\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837054,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-2952c591-6e41-90ec-81ca-894b8e84f0aa\",\"choices\":[{\"delta\":{\"content\":\"\"},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1788837054,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1788837054,\"id\":\"chatcmpl-2952c591-6e41-90ec-81ca-894b8e84f0aa\",\"model\":\"qwen3.8-flash\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":6,\"completion_tokens_details\":{},\"prompt_tokens\":110,\"prompt_tokens_details\":{\"cached_tokens\":0,\"image_tokens\":82,\"text_tokens\":28},\"total_tokens\":116}}\n\ndata: [DONE]\n\n"
+        "body": "data: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-69096b14-dda4-93fc-a838-0e7640f71dfa\",\"created\":1790904224,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-69096b14-dda4-93fc-a838-0e7640f71dfa\",\"choices\":[{\"delta\":{\"content\":\"j\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904224,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-69096b14-dda4-93fc-a838-0e7640f71dfa\",\"choices\":[{\"delta\":{\"content\":\"igg\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904224,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-69096b14-dda4-93fc-a838-0e7640f71dfa\",\"choices\":[{\"delta\":{\"content\":\"ling restroom prison\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904224,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-flash\",\"id\":\"chatcmpl-69096b14-dda4-93fc-a838-0e7640f71dfa\",\"choices\":[{\"delta\":{\"content\":\"\"},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1790904224,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1790904224,\"id\":\"chatcmpl-69096b14-dda4-93fc-a838-0e7640f71dfa\",\"model\":\"qwen3.8-flash\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":6,\"completion_tokens_details\":{},\"prompt_tokens\":123,\"prompt_tokens_details\":{\"cached_tokens\":0,\"image_tokens\":82,\"text_tokens\":41},\"total_tokens\":129}}\n\ndata: [DONE]\n\n"
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-obeys-named-tool-choice.json

@@ -10,7 +10,7 @@
       "tool-choice"
     ],
     "name": "alibaba-chat/qwen-3-8-max-obeys-named-tool-choice",
-    "recordedAt": "2026-09-08T03:10:56.576Z"
+    "recordedAt": "2026-10-02T01:23:46.235Z"
   },
   "interactions": [
     {
@@ -21,14 +21,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"Find the current weather in Paris.\"}],\"tools\":[{\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"description\":\"Get weather in a city\",\"parameters\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\",\"enum\":[\"Paris\"]}},\"required\":[\"city\"]}}}],\"tool_choice\":{\"type\":\"function\",\"function\":{\"name\":\"get_weather\"}},\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"none\",\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Find the current weather in Paris.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"tools\":[{\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"description\":\"Get weather in a city\",\"parameters\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\",\"enum\":[\"Paris\"]}},\"required\":[\"city\"]}}}],\"tool_choice\":{\"type\":\"function\",\"function\":{\"name\":\"get_weather\"}},\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"none\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
-        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"tool_calls\":[{\"index\":0,\"id\":\"call_4eb823cb28d141c8befbb331\",\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"arguments\":\"\"}}]},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"index\":0,\"id\":\"\",\"type\":\"function\",\"function\":{\"arguments\":\"\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"{\\\"city\\\": \\\"Paris\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"\\\"\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"}\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"choices\":[{\"delta\":{\"tool_calls\":[{\"function\":{\"arguments\":\"\"},\"index\":0,\"id\":null,\"type\":\"function\"}],\"content\":\"\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"choices\":[{\"delta\":{},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1788837055,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1788837055,\"id\":\"chatcmpl-681dfa5a-ae08-98da-ba0d-4b1d0d364b6b\",\"model\":\"qwen3.8-max\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":19,\"prompt_tokens\":288,\"prompt_tokens_details\":{\"cached_tokens\":0,\"text_tokens\":288},\"total_tokens\":307}}\n\ndata: [DONE]\n\n"
+        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"tool_calls\":[{\"index\":0,\"id\":\"call_3b220e76d7d946f498d026c0\",\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"arguments\":\"\"}}]},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"index\":0,\"id\":\"\",\"type\":\"function\",\"function\":{\"arguments\":\"\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"{\\\"city\\\": \\\"Paris\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"\\\"\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"}\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"choices\":[{\"delta\":{\"content\":\"\",\"tool_calls\":[{\"type\":\"function\",\"index\":0,\"function\":{\"arguments\":\"\"}}]},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"choices\":[{\"delta\":{\"tool_calls\":[{\"function\":{\"arguments\":\"\"},\"index\":0,\"id\":null,\"type\":\"function\"}],\"content\":\"\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"choices\":[{\"delta\":{},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1790904225,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1790904225,\"id\":\"chatcmpl-bf693c1a-0554-935b-ab28-cda0a18a27ff\",\"model\":\"qwen3.8-max\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":19,\"prompt_tokens\":288,\"prompt_tokens_details\":{\"cache_creation\":{\"ephemeral_5m_input_tokens\":0},\"cache_creation_input_tokens\":0,\"cache_type\":\"ephemeral\",\"cache_write_tokens\":0,\"cached_tokens\":0,\"text_tokens\":288},\"total_tokens\":307}}\n\ndata: [DONE]\n\n"
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-replays-reasoning-through-a-tool-loop-and-follow-up.json

@@ -12,7 +12,7 @@
       "continuation"
     ],
     "name": "alibaba-chat/qwen-3-8-max-replays-reasoning-through-a-tool-loop-and-follow-up",
-    "recordedAt": "2026-09-08T03:09:54.566Z"
+    "recordedAt": "2026-10-02T01:23:36.578Z"
   },
   "interactions": [
     {
@@ -23,14 +23,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"We have a budget of 38000 dollars for 219 trips costing 173 dollars each. Calculate whether that is affordable. If it is, use get_weather to look up the current weather in Paris. After receiving the result, report the weather in one short sentence.\"}],\"tools\":[{\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"description\":\"Get the current weather in a city\",\"parameters\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\",\"enum\":[\"Paris\"]}},\"required\":[\"city\"],\"additionalProperties\":false}}}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"medium\",\"tool_stream\":true,\"max_completion_tokens\":4096,\"preserve_thinking\":true}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"We have a budget of 38000 dollars for 219 trips costing 173 dollars each. Calculate whether that is affordable. If it is, use get_weather to look up the current weather in Paris. After receiving the result, report the weather in one short sentence.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"tools\":[{\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"description\":\"Get the current weather in a city\",\"parameters\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\",\"enum\":[\"Paris\"]}},\"required\":[\"city\"],\"additionalProperties\":false}}}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"medium\",\"tool_stream\":true,\"max_completion_tokens\":4096,\"preserve_thinking\":true}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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+        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"created\":1790904215,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"The\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904215,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" tool reported\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904215,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 18°C\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904215,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\".\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904215,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"choices\":[{\"delta\":{\"content\":\"18°C\",\"reasoning_content\":\"\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904215,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\"},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1790904215,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1790904215,\"id\":\"chatcmpl-ba39bdbc-1408-9be9-bc93-fea920370869\",\"model\":\"qwen3.8-max\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":14,\"completion_tokens_details\":{\"reasoning_tokens\":8,\"text_tokens\":14},\"prompt_tokens\":587,\"prompt_tokens_details\":{\"cache_creation\":{\"ephemeral_5m_input_tokens\":0},\"cache_creation_input_tokens\":0,\"cache_type\":\"ephemeral\",\"cache_write_tokens\":0,\"cached_tokens\":0,\"text_tokens\":587},\"total_tokens\":601}}\n\ndata: [DONE]\n\n"
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-returns-a-json-object.json

@@ -9,7 +9,7 @@
       "structured-output"
     ],
     "name": "alibaba-chat/qwen-3-8-max-returns-a-json-object",
-    "recordedAt": "2026-09-08T03:11:29.462Z"
+    "recordedAt": "2026-10-02T01:23:47.415Z"
   },
   "interactions": [
     {
@@ -20,14 +20,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"Return a JSON object with one key \\\"city\\\" set to the capital city of France.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"none\",\"max_completion_tokens\":1024,\"response_format\":{\"type\":\"json_object\"}}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Return a JSON object with one key \\\"city\\\" set to the capital city of France.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"none\",\"max_completion_tokens\":1024,\"response_format\":{\"type\":\"json_object\"}}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
-        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-de34af77-7b1e-9999-a48f-e564c03d4b6b\",\"created\":1788837088,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-de34af77-7b1e-9999-a48f-e564c03d4b6b\",\"choices\":[{\"delta\":{\"content\":\"{\\\"\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837088,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-de34af77-7b1e-9999-a48f-e564c03d4b6b\",\"choices\":[{\"delta\":{\"content\":\"city\\\":\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837088,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-de34af77-7b1e-9999-a48f-e564c03d4b6b\",\"choices\":[{\"delta\":{\"content\":\" \\\"Paris\\\"}\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788837088,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-de34af77-7b1e-9999-a48f-e564c03d4b6b\",\"choices\":[{\"delta\":{\"content\":\"\"},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1788837088,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1788837088,\"id\":\"chatcmpl-de34af77-7b1e-9999-a48f-e564c03d4b6b\",\"model\":\"qwen3.8-max\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":6,\"prompt_tokens\":32,\"prompt_tokens_details\":{\"cached_tokens\":0,\"text_tokens\":32},\"total_tokens\":38}}\n\ndata: [DONE]\n\n"
+        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-8a907cb0-1885-92de-bde7-b81cdc64a55b\",\"created\":1790904226,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-8a907cb0-1885-92de-bde7-b81cdc64a55b\",\"choices\":[{\"delta\":{\"content\":\"{\\\"\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904226,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-8a907cb0-1885-92de-bde7-b81cdc64a55b\",\"choices\":[{\"delta\":{\"content\":\"city\\\":\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904226,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-8a907cb0-1885-92de-bde7-b81cdc64a55b\",\"choices\":[{\"delta\":{\"content\":\" \\\"Paris\\\"}\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904226,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-8a907cb0-1885-92de-bde7-b81cdc64a55b\",\"choices\":[{\"delta\":{\"content\":\"\"},\"index\":0,\"finish_reason\":\"stop\",\"logprobs\":null}],\"created\":1790904226,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"choices\":[],\"created\":1790904226,\"id\":\"chatcmpl-8a907cb0-1885-92de-bde7-b81cdc64a55b\",\"model\":\"qwen3.8-max\",\"object\":\"chat.completion.chunk\",\"usage\":{\"completion_tokens\":6,\"prompt_tokens\":32,\"prompt_tokens_details\":{\"cache_creation\":{\"ephemeral_5m_input_tokens\":0},\"cache_creation_input_tokens\":0,\"cache_type\":\"ephemeral\",\"cache_write_tokens\":0,\"cached_tokens\":0,\"text_tokens\":32},\"total_tokens\":38}}\n\ndata: [DONE]\n\n"
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-default-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-default-effort",
-    "recordedAt": "2026-09-08T03:08:03.087Z"
+    "recordedAt": "2026-10-02T01:23:08.402Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-high-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-high-effort",
-    "recordedAt": "2026-09-08T03:09:41.038Z"
+    "recordedAt": "2026-10-02T01:23:22.666Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"high\",\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"high\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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+        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"created\":1790904200,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"We\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904200,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" need answer user\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904200,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: 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{\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" only.\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904200,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" Need compute 1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904200,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"73*2\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904200,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: 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{\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"3287\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904200,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5161785a-7f2c-9148-a072-f86ebb6b4b58\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoninLine truncated
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-low-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-low-effort",
-    "recordedAt": "2026-09-08T03:09:34.363Z"
+    "recordedAt": "2026-10-02T01:23:16.772Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"low\",\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"low\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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{\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"73 × \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"219.\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n\\n173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: 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{\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"200 +\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 19)\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n= 1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"73 × \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"200 +\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" × 19\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836971,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-917106a3-dfdd-9124-82dc-900de2edcf25\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n= 3\"Line truncated
+        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"Let\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" me calculate 1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"73 × \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"219.\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n\\n173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" × 21\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"9 = 1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"73 × (\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"200 +\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 19)\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n= 1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"73 × \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"200 +\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" × 19\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904193,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-c369af93-ee05-9a82-a19b-6ff6348dbb7d\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n= 3\"Line truncated
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-max-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-max-effort",
-    "recordedAt": "2026-09-08T03:09:49.033Z"
+    "recordedAt": "2026-10-02T01:23:30.455Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"max\",\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"max\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
-        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"We\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" need answer user's\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" simple arithmetic\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\": 17\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"3 * 2\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"19\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\". Need final only\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" integer. Compute:\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"*200\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"=346\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"00;\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"*19=\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"3287\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836985,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-5202c901-3c72-9b43-8a9f-3db17d85a1cb\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoningLine truncated
+        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"We\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" need answer user\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\":\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" \\\"What is \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"173 multiplied\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" by 21\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"9? Reply with\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" only the final integer\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\".\\\" Need compute.\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" 173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"*219\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" = 17\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"3*(20\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"0+19\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\")=346\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904206,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-03edb52e-dc72-9acc-980c-3f783db5a23e\",\"choices\":[{\"delta\":{\"conLine truncated
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-medium-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-medium-effort",
-    "recordedAt": "2026-09-08T03:09:38.233Z"
+    "recordedAt": "2026-10-02T01:23:20.103Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"medium\",\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"medium\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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{\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" calculate 17\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"3 × 2\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"19 and reply\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: 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{\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"219:\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" × 20\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"0 = 3\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"4,60\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"0\\n17\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"3 × 1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1788836974,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-a42ce2bc-4c60-9079-9b86-31ce3737204c\",\"choices\":[{\"delta\":{\"content\Line truncated
+        "body": "data: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null,\"choices\":[{\"logprobs\":null,\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\",\"reasoning_content\":\"\"},\"finish_reason\":null}]}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"The\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" user wants me to\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: 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{\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" with only the final\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" integer.\\n\\n1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"73 × \"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"219:\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"\\n173\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\" × 20\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"0 = 3\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"4,60\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"0\\n17\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\":\"\",\"reasoning_content\":\"3 × 1\"},\"index\":0,\"finish_reason\":null,\"logprobs\":null}],\"created\":1790904197,\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"model\":\"qwen3.8-max\",\"id\":\"chatcmpl-231b166c-7ab2-9476-af1c-edce81920373\",\"choices\":[{\"delta\":{\"content\Line truncated
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-minimal-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-minimal-effort",
-    "recordedAt": "2026-09-08T03:09:31.692Z"
+    "recordedAt": "2026-10-02T01:23:12.765Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"minimal\",\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"minimal\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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\"},\Line truncated
       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-none-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-none-effort",
-    "recordedAt": "2026-09-08T03:09:27.584Z"
+    "recordedAt": "2026-10-02T01:23:09.451Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
-        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 173 multiplied by 219? Reply with only the final integer.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"none\",\"max_completion_tokens\":4096}"
+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"none\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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       }
     }
   ]

packages/ai/test/fixtures/recordings/alibaba-chat/qwen-3-8-max-streams-xhigh-effort.json

@@ -11,7 +11,7 @@
       "usage"
     ],
     "name": "alibaba-chat/qwen-3-8-max-streams-xhigh-effort",
-    "recordedAt": "2026-09-08T03:09:45.046Z"
+    "recordedAt": "2026-10-02T01:23:26.218Z"
   },
   "interactions": [
     {
@@ -22,14 +22,14 @@
         "headers": {
           "content-type": "application/json"
         },
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+        "body": "{\"model\":\"qwen3.8-max\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 173 multiplied by 219? Reply with only the final integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"reasoning_effort\":\"xhigh\",\"max_completion_tokens\":4096}"
       },
       "response": {
         "status": 200,
         "headers": {
           "content-type": "text/event-stream;charset=utf-8"
         },
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packages/ai/test/fixtures/recordings/cohere/continues-a-native-tool-call.json

@@ -0,0 +1,49 @@
+{
+  "version": 1,
+  "metadata": {
+    "tags": [
+      "prefix:cohere",
+      "provider:cohere"
+    ],
+    "name": "cohere/continues-a-native-tool-call",
+    "recordedAt": "2026-10-02T02:36:16.143Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/chat",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"command-a-plus-05-2026\",\"messages\":[{\"role\":\"system\",\"content\":\"Use the get_weather tool exactly once. After the tool result, reply exactly: Paris is sunny.\"},{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is the weather in Paris?\"}]}],\"stream\":true,\"tools\":[{\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"description\":\"Get current weather for a city.\",\"parameters\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}}],\"max_tokens\":2048}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream"
+        },
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+      }
+    },
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/chat",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"command-a-plus-05-2026\",\"messages\":[{\"role\":\"system\",\"content\":\"Use the get_weather tool exactly once. After the tool result, reply exactly: Paris is sunny.\"},{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is the weather in Paris?\"}]},{\"role\":\"assistant\",\"content\":[{\"type\":\"thinking\",\"thinking\":\"The user is asking about the weather in Paris. I have access to a get_weather function that takes a city parameter. The instructions say to use the get_weather tool exactly once, and then reply exactly \\\"Paris is sunny\\\" after getting the tool result.\\n\\nLet me call the get_weather function with \\\"Paris\\\" as the city parameter.\"}],\"tool_calls\":[{\"id\":\"get_weather_mdhvw7kbf1e3\",\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"arguments\":\"{\\\"city\\\":\\\"Paris\\\"}\"}}]},{\"role\":\"tool\",\"content\":\"{\\\"temperature\\\":22,\\\"condition\\\":\\\"sunny\\\"}\",\"tool_call_id\":\"get_weather_mdhvw7kbf1e3\"}],\"stream\":true,\"tools\":[{\"type\":\"function\",\"function\":{\"name\":\"get_weather\",\"description\":\"Get current weather for a city.\",\"parameters\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}}],\"max_tokens\":2048}"
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+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream"
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+      }
+    }
+  ]
+}

packages/ai/test/fixtures/recordings/cohere/streams-compatible-chat-reasoning.json

@@ -0,0 +1,31 @@
+{
+  "version": 1,
+  "metadata": {
+    "tags": [
+      "prefix:cohere",
+      "provider:cohere"
+    ],
+    "name": "cohere/streams-compatible-chat-reasoning",
+    "recordedAt": "2026-10-02T02:39:47.406Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://api.cohere.ai/compatibility/v1/chat/completions",
+        "headers": {
+          "content-type": "application/json"
+        },
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+        "headers": {
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{\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" so\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" I\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" need\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" to\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" figure\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" out\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" what\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" 1\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\"7\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" multiplied\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" by\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" 2\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\"3\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"index\":0,\"finish_reason\":null,\"delta\":{\"reasoning_content\":\" is\"},\"logprobs\":null}],\"created\":1790908779,\"model\":\"command-a-reasoning-08-2025\",\"object\":\"chat.completion.chunk\",\"usage\":null}\n\ndata: {\"id\":\"52b1dec0-5396-46a4-9897-9e0adf56038b\",\"choices\":[{\"indLine truncated
+      }
+    }
+  ]
+}

packages/ai/test/fixtures/recordings/cohere/streams-native-text-and-usage.json

@@ -0,0 +1,31 @@
+{
+  "version": 1,
+  "metadata": {
+    "tags": [
+      "prefix:cohere",
+      "provider:cohere"
+    ],
+    "name": "cohere/streams-native-text-and-usage",
+    "recordedAt": "2026-10-02T02:36:12.967Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/chat",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"command-a-03-2025\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Reply exactly: OK\"}]}],\"stream\":true,\"max_tokens\":64}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream"
+        },
+        "body": "event: message-start\ndata: {\"id\":\"a171b3a5-db11-4445-a645-5221fb466ab8\",\"type\":\"message-start\",\"delta\":{\"message\":{\"role\":\"assistant\",\"content\":[],\"tool_plan\":\"\",\"tool_calls\":[],\"citations\":[]}}}\n\nevent: content-start\ndata: {\"type\":\"content-start\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"type\":\"text\",\"text\":\"\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"text\":\"OK\"}}}}\n\nevent: content-end\ndata: {\"type\":\"content-end\",\"index\":0}\n\nevent: message-end\ndata: {\"type\":\"message-end\",\"delta\":{\"finish_reason\":\"COMPLETE\",\"usage\":{\"billed_units\":{\"input_tokens\":4,\"output_tokens\":1},\"tokens\":{\"input_tokens\":499,\"output_tokens\":4},\"cached_tokens\":464}}}\n\ndata: [DONE]\n\n"
+      }
+    }
+  ]
+}

packages/ai/test/fixtures/recordings/cohere/streams-native-thinking-with-a-budget.json

@@ -0,0 +1,31 @@
+{
+  "version": 1,
+  "metadata": {
+    "tags": [
+      "prefix:cohere",
+      "provider:cohere"
+    ],
+    "name": "cohere/streams-native-thinking-with-a-budget",
+    "recordedAt": "2026-10-02T02:36:14.669Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://api.cohere.com/v2/chat",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"command-a-reasoning-08-2025\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 17 times 23? Answer briefly.\"}]}],\"stream\":true,\"thinking\":{\"type\":\"enabled\",\"token_budget\":128},\"max_tokens\":2048}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream"
+        },
+        "body": "event: message-start\ndata: {\"id\":\"305edbbe-9f86-4bc0-9490-7766b168a453\",\"type\":\"message-start\",\"delta\":{\"message\":{\"role\":\"assistant\",\"content\":[],\"tool_plan\":\"\",\"tool_calls\":[],\"citations\":[]}}}\n\nevent: content-start\ndata: {\"type\":\"content-start\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"type\":\"thinking\",\"thinking\":\"\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\"Okay\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\",\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" let\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\"'s\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" see\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\".\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" I\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" need\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" to\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" figure\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" out\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" what\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" 1\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\"7\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" multiplied\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" by\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" 2\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\"3\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" is\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\".\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" H\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\"mm\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\",\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" how\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" do\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" I\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" do\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" this\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\"?\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" I\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" remember\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" some\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" multiplication\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",\"index\":0,\"delta\":{\"message\":{\"content\":{\"thinking\":\" methods\"}}}}\n\nevent: content-delta\ndata: {\"type\":\"content-delta\",Line truncated
+      }
+    }
+  ]
+}

packages/ai/test/http-timeout.test.ts

@@ -0,0 +1,169 @@
+import { describe, expect } from "bun:test"
+import { Deferred, Effect, Fiber } from "effect"
+import * as TestClock from "effect/testing/TestClock"
+import { HttpOptions, LLM, mergeHttpOptions } from "../src/index.js"
+import { LLMClient } from "../src/route.js"
+import { configure } from "../src/providers/openai.js"
+import { dynamicResponse } from "./lib/http.js"
+import { deltaChunk, finishChunk } from "./lib/openai-chunks.js"
+import { sseEvents, sseRaw } from "./lib/sse.js"
+import { it } from "./lib/effect.js"
+
+const model = configure({ baseURL: "https://api.openai.test/v1/", apiKey: "test" }).chat("gpt-4.1-mini")
+const SSE = { headers: { "content-type": "text/event-stream" } }
+
+const silentServer = dynamicResponse(() => Effect.never)
+
+const slowHeadersServer = dynamicResponse((input) =>
+  Effect.sleep("10 minutes").pipe(
+    Effect.as(input.respond(sseEvents(deltaChunk({ role: "assistant", content: "Hi" }), finishChunk("stop")), SSE)),
+  ),
+)
+
+// Sends one chunk, then stalls until `resume` releases the rest of the body.
+const stalledServer = Effect.gen(function* () {
+  const stalled = yield* Deferred.make<void>()
+  let resume = () => {}
+  const released = new Promise<void>((resolve) => {
+    resume = resolve
+  })
+  const encoder = new TextEncoder()
+  const layer = dynamicResponse((input) =>
+    Effect.sync(() =>
+      input.respond(
+        new ReadableStream<Uint8Array>({
+          start(controller) {
+            controller.enqueue(encoder.encode(sseRaw(`data: ${JSON.stringify(deltaChunk({ content: "Hi" }))}`)))
+          },
+          async pull(controller) {
+            Deferred.doneUnsafe(stalled, Effect.void)
+            await released
+            controller.enqueue(encoder.encode(sseEvents(finishChunk("stop"))))
+            controller.close()
+          },
+        }),
+        SSE,
+      ),
+    ),
+  )
+  return { layer, stalled, resume: () => resume() }
+})
+
+describe("HTTP transport timeouts", () => {
+  it.effect("fails when response headers take longer than five minutes", () =>
+    Effect.gen(function* () {
+      const fiber = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+        Effect.provide(silentServer),
+        Effect.flip,
+        Effect.forkChild({ startImmediately: true }),
+      )
+      yield* TestClock.adjust("5 minutes")
+      const error = yield* Fiber.join(fiber)
+
+      expect(error.reason).toMatchObject({
+        _tag: "Transport",
+        transport: "http",
+        operation: "request",
+        code: "Timeout",
+      })
+    }),
+  )
+
+  it.effect("fails when the response body stalls for five minutes", () =>
+    Effect.gen(function* () {
+      const server = yield* stalledServer
+      const fiber = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+        Effect.provide(server.layer),
+        Effect.flip,
+        Effect.forkChild({ startImmediately: true }),
+      )
+      yield* Deferred.await(server.stalled)
+      yield* Effect.yieldNow
+      yield* TestClock.adjust("5 minutes")
+      const error = yield* Fiber.join(fiber)
+
+      expect(error.reason).toMatchObject({ _tag: "Transport", transport: "http", operation: "read", code: "Timeout" })
+      expect(error.reason.http).toMatchObject({ status: 200 })
+    }),
+  )
+
+  it.effect("applies a configured header timeout", () =>
+    Effect.gen(function* () {
+      const fiber = yield* LLMClient.generate(
+        LLM.request({ model, prompt: "Hello", http: { headerTimeout: 1_000 } }),
+      ).pipe(Effect.provide(silentServer), Effect.flip, Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("1 second")
+      const error = yield* Fiber.join(fiber)
+
+      expect(error.reason).toMatchObject({ _tag: "Transport", operation: "request", code: "Timeout" })
+    }),
+  )
+
+  it.effect("disables the header timeout with false", () =>
+    Effect.gen(function* () {
+      const fiber = yield* LLMClient.generate(
+        LLM.request({ model, prompt: "Hello", http: { headerTimeout: false } }),
+      ).pipe(Effect.provide(slowHeadersServer), Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("10 minutes")
+      const response = yield* Fiber.join(fiber)
+
+      expect(response.text).toBe("Hi")
+    }),
+  )
+
+  it.effect("disables the chunk timeout with false", () =>
+    Effect.gen(function* () {
+      const server = yield* stalledServer
+      const fiber = yield* LLMClient.generate(
+        LLM.request({ model, prompt: "Hello", http: { chunkTimeout: false } }),
+      ).pipe(Effect.provide(server.layer), Effect.forkChild({ startImmediately: true }))
+      yield* Deferred.await(server.stalled)
+      yield* Effect.yieldNow
+      yield* TestClock.adjust("10 minutes")
+      server.resume()
+      const response = yield* Fiber.join(fiber)
+
+      expect(response.text).toBe("Hi")
+    }),
+  )
+
+  it.effect("applies a whole-request timeout while the body is still streaming", () =>
+    Effect.gen(function* () {
+      const server = yield* stalledServer
+      const fiber = yield* LLMClient.generate(
+        LLM.request({ model, prompt: "Hello", http: { timeout: 60_000, chunkTimeout: false } }),
+      ).pipe(Effect.provide(server.layer), Effect.flip, Effect.forkChild({ startImmediately: true }))
+      yield* Deferred.await(server.stalled)
+      yield* Effect.yieldNow
+      yield* TestClock.adjust("1 minute")
+      const error = yield* Fiber.join(fiber)
+
+      expect(error.reason).toMatchObject({ _tag: "Transport", operation: "read", code: "Timeout" })
+    }),
+  )
+
+  it.effect("bounds the header wait by a shorter whole-request timeout", () =>
+    Effect.gen(function* () {
+      const fiber = yield* LLMClient.generate(
+        LLM.request({ model, prompt: "Hello", http: { timeout: 1_000, headerTimeout: false } }),
+      ).pipe(Effect.provide(silentServer), Effect.flip, Effect.forkChild({ startImmediately: true }))
+      yield* TestClock.adjust("1 second")
+      const error = yield* Fiber.join(fiber)
+
+      expect(error.reason).toMatchObject({ _tag: "Transport", operation: "request", code: "Timeout" })
+    }),
+  )
+
+  it.effect("merges timeouts with later values winning", () =>
+    Effect.sync(() => {
+      const merged = mergeHttpOptions(
+        new HttpOptions({ timeout: 5_000, headerTimeout: 1_000, chunkTimeout: 2_000 }),
+        new HttpOptions({ headers: { a: "b" } }),
+        new HttpOptions({ chunkTimeout: false }),
+      )
+
+      expect(merged).toMatchObject({ headers: { a: "b" }, timeout: 5_000, headerTimeout: 1_000, chunkTimeout: false })
+      expect(mergeHttpOptions(new HttpOptions({}), undefined)).toBeUndefined()
+    }),
+  )
+})

packages/ai/test/provider-error.test.ts

@@ -462,6 +462,27 @@ describe("provider error rawBody classification", () => {
     expect(reason._tag === "InvalidRequest" ? reason.classification : reason._tag).toBe("context-overflow")
   })
 
+  test("separates Cohere prompt overflow from output limit rejections", () => {
+    const classify = (message: string) => {
+      const reason = classifyProviderFailure({
+        message,
+        status: 400,
+        rawBody: JSON.stringify({ error_type: "TOO_MANY_TOKENS", message }),
+      })
+      return reason._tag === "InvalidRequest" ? reason.classification : reason._tag
+    }
+    expect(
+      classify(
+        "too many tokens: size limit exceeded by 168512 tokens. Try using shorter or fewer inputs. The limit for this model is 132000 tokens.",
+      ),
+    ).toBe("context-overflow")
+    expect(
+      classify(
+        "too many tokens: max tokens must be less than or equal to 4096, the maximum output length for this model - received 1000000.",
+      ),
+    ).toBeUndefined()
+  })
+
   test("classifies invalid API keys reported as HTTP 400 as authentication failures", () => {
     const rawBody = JSON.stringify({
       error: {

packages/ai/test/provider-package.test.ts

@@ -121,6 +121,25 @@ describe("provider package entrypoints", () => {
     })
   })
 
+  test("maps Cohere entrypoints onto native and compatibility routes", async () => {
+    const modules = await Promise.all([
+      import("@opencode/ai/providers/cohere"),
+      import("@opencode/ai/providers/cohere/chat"),
+    ])
+    const settings = { apiKey: "fixture", headers: { "x-test": "fixture" }, body: { future_option: true } }
+    const routes = [
+      ["cohere-chat", "https://api.cohere.com/v2"],
+      ["cohere-chat-completions", "https://api.cohere.ai/compatibility/v1"],
+    ]
+    modules.forEach((module, index) => {
+      const selected = module.model("command-a-03-2025", settings)
+      expect(selected.provider).toBe("cohere")
+      expect([selected.route.id, selected.route.endpoint.baseURL]).toEqual(routes[index])
+      expect(selected.route.defaults.headers).toEqual(settings.headers)
+      expect(selected.route.defaults.http?.body).toEqual(settings.body)
+    })
+  })
+
   test("maps MiniMax API entrypoints onto provider-owned routes", async () => {
     const modules = await Promise.all([
       import("@opencode/ai/providers/minimax"),

packages/ai/test/provider/cohere.recorded.test.ts

@@ -0,0 +1,90 @@
+import { expect } from "bun:test"
+import { Effect } from "effect"
+import { LLM, LLMEvent } from "../../src/index.js"
+import { Cohere } from "../../src/providers/cohere.js"
+import { LLMClient } from "../../src/route.js"
+import { expectWeatherToolLoop, goldenWeatherToolLoopRequest, runWeatherToolLoop } from "../recorded-scenarios.js"
+import { recordedTests } from "../recorded-test.js"
+
+const recorded = recordedTests({ prefix: "cohere", provider: "cohere", requires: ["COHERE_API_KEY"] })
+const cohere = Cohere.configure({ apiKey: process.env.COHERE_API_KEY ?? "fixture" })
+
+recorded.effect(
+  "streams native text and usage",
+  () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(
+        LLM.request({
+          model: cohere.model("command-a-03-2025"),
+          prompt: "Reply exactly: OK",
+          generation: { maxTokens: 64 },
+        }),
+      )
+      expect(response.text.trim()).toMatch(/^OK\.?$/)
+      expect(response.usage.inputTokens).toBeGreaterThan(0)
+      expect(response.usage.outputTokens).toBeGreaterThan(0)
+      expect(response.events.find(LLMEvent.is.finish)?.reason).toEqual({ normalized: "stop", raw: "COMPLETE" })
+      expect(response.usage.providerMetadata?.cohere?.billed_units).toBeDefined()
+    }),
+  60_000,
+)
+
+recorded.effect(
+  "streams native thinking with a budget",
+  () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(
+        LLM.request({
+          model: cohere.model("command-a-reasoning-08-2025"),
+          prompt: "What is 17 times 23? Answer briefly.",
+          providerOptions: { thinking: { type: "enabled", tokenBudget: 128 } },
+          generation: { maxTokens: 2048 },
+        }),
+      )
+      expect(response.reasoning.length).toBeGreaterThan(0)
+      expect(response.text).toContain("391")
+      expect(response.usage.reasoningTokens).toBeGreaterThan(0)
+      expect(response.usage.reasoningTokens).toBeLessThanOrEqual(128)
+      expect(response.events.filter(LLMEvent.is.finish)).toHaveLength(1)
+    }),
+  60_000,
+)
+
+recorded.effect(
+  "continues a native tool call",
+  () =>
+    Effect.gen(function* () {
+      const events = yield* runWeatherToolLoop(
+        goldenWeatherToolLoopRequest({
+          id: "cohere-tool-loop",
+          model: cohere.model("command-a-plus-05-2026"),
+          maxTokens: 2048,
+          temperature: false,
+        }),
+      )
+      expectWeatherToolLoop(events)
+      expect(events.some(LLMEvent.is.toolInputDelta)).toBe(true)
+    }),
+  60_000,
+)
+
+recorded.effect(
+  "streams compatible chat reasoning",
+  () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(
+        LLM.request({
+          model: cohere.chat("command-a-reasoning-08-2025"),
+          prompt: "What is 17 times 23? Answer briefly.",
+          providerOptions: { reasoningEffort: "high" },
+          generation: { maxTokens: 2048 },
+        }),
+      )
+      expect(response.reasoning.length).toBeGreaterThan(0)
+      expect(response.text).toContain("391")
+      expect(response.events.find(LLMEvent.is.finish)?.reason.normalized).toBe("stop")
+      expect(response.usage.inputTokens).toBeGreaterThan(0)
+      expect(response.usage.reasoningTokens).toBeGreaterThan(0)
+    }),
+  60_000,
+)

packages/ai/test/provider/cohere.test.ts

@@ -0,0 +1,266 @@
+import { expect, test } from "bun:test"
+import { Effect } from "effect"
+import { LLM, LLMClient, LLMEvent, Media, Message, isRetryable } from "../../src/index.js"
+import { Cohere } from "../../src/providers/cohere.js"
+import { compileRequest } from "../../src/route/client.js"
+import { it } from "../lib/effect.js"
+import { fixedResponse } from "../lib/http.js"
+import { sseEvents } from "../lib/sse.js"
+
+const cohere = Cohere.configure({ apiKey: "fixture" })
+
+test("Cohere exposes native and compatible endpoints without Core remapping", () => {
+  expect(cohere.model("command-a-03-2025").route.endpoint.baseURL).toBe("https://api.cohere.com/v2")
+  expect(cohere.chat("command-a-03-2025").route.endpoint.baseURL).toBe("https://api.cohere.ai/compatibility/v1")
+  expect(
+    Cohere.model("command-a-03-2025", { apiKey: "fixture", headers: { "X-Test": "yes" }, body: { temperature: 0 } })
+      .route.defaults?.http,
+  ).toMatchObject({ body: { temperature: 0 } })
+})
+
+it.effect("Cohere lowers native history, thinking, tools, and sampling", () =>
+  Effect.gen(function* () {
+    const prepared = yield* compileRequest(
+      LLM.request({
+        model: cohere.model("command-a-reasoning-08-2025"),
+        system: "Be concise.",
+        messages: [
+          Message.user("Lookup Paris"),
+          Message.assistant([{ type: "tool-call", id: "lookup-1", name: "lookup", input: { city: "Paris" } }]),
+          Message.tool({ id: "lookup-1", name: "lookup", result: { sunny: true } }),
+        ],
+        tools: [{ name: "lookup", description: "Look up a city", inputSchema: { type: "object", properties: {} } }],
+        toolChoice: "required",
+        providerOptions: { thinking: { tokenBudget: 128 } },
+        generation: { maxTokens: 2048, topP: 0.9, topK: 10 },
+      }),
+    )
+    expect(prepared.body).toMatchObject({
+      model: "command-a-reasoning-08-2025",
+      stream: true,
+      p: 0.9,
+      k: 10,
+      max_tokens: 2048,
+      thinking: { type: "enabled", token_budget: 128 },
+      tool_choice: "REQUIRED",
+      messages: [
+        { role: "system", content: "Be concise." },
+        { role: "user", content: [{ type: "text", text: "Lookup Paris" }] },
+        {
+          role: "assistant",
+          tool_calls: [{ id: "lookup-1", function: { name: "lookup", arguments: '{"city":"Paris"}' } }],
+        },
+        { role: "tool", tool_call_id: "lookup-1", content: '{"sunny":true}' },
+      ],
+    })
+  }),
+)
+
+it.effect("Cohere compatibility omits unsupported OpenAI fields", () =>
+  Effect.gen(function* () {
+    const prepared = yield* compileRequest(
+      LLM.request({
+        model: cohere.chat("command-a-reasoning-08-2025"),
+        prompt: "Hello",
+        providerOptions: { reasoningEffort: "high" },
+        generation: { maxTokens: 64 },
+      }),
+    )
+    expect(prepared.body).toMatchObject({ reasoning_effort: "high", max_tokens: 64, stream: true })
+    expect(prepared.body.stream_options).toEqual({ include_usage: true })
+    for (const key of ["store", "max_completion_tokens", "parallel_tool_calls", "prompt_cache_key"])
+      expect(prepared.body[key]).toBeUndefined()
+  }),
+)
+
+it.effect("Cohere maps inclusive usage while retaining distinct billed units", () =>
+  Effect.gen(function* () {
+    const response = yield* LLMClient.generate(
+      LLM.request({ model: cohere.model("command-a-03-2025"), prompt: "Hi" }),
+    ).pipe(
+      Effect.provide(
+        fixedResponse(
+          sseEvents(
+            { type: "message-start" },
+            { type: "content-start", index: 0, delta: { message: { content: { type: "thinking", thinking: "" } } } },
+            { type: "content-delta", index: 0, delta: { message: { content: { thinking: "Think" } } } },
+            { type: "content-end", index: 0 },
+            { type: "content-start", index: 1, delta: { message: { content: { type: "text", text: "" } } } },
+            { type: "content-delta", index: 1, delta: { message: { content: { text: "OK" } } } },
+            { type: "content-end", index: 1 },
+            {
+              type: "message-end",
+              delta: {
+                finish_reason: "COMPLETE",
+                usage: {
+                  tokens: { input_tokens: 100, output_tokens: 20, reasoning_tokens: 10 },
+                  billed_units: { input_tokens: 30, output_tokens: 15 },
+                  cached_tokens: 60,
+                },
+              },
+            },
+          ),
+        ),
+      ),
+    )
+    expect(response.text).toBe("OK")
+    expect(response.reasoning).toBe("Think")
+    expect(response.usage).toMatchObject({
+      inputTokens: 100,
+      nonCachedInputTokens: 40,
+      cacheReadInputTokens: 60,
+      outputTokens: 20,
+      reasoningTokens: 10,
+      totalTokens: 120,
+      providerMetadata: { cohere: { billed_units: { input_tokens: 30, output_tokens: 15 } } },
+    })
+    expect(response.events.filter(LLMEvent.is.finish)).toHaveLength(1)
+  }),
+)
+
+it.effect("Cohere rejects incomplete streams", () =>
+  Effect.gen(function* () {
+    const error = yield* LLMClient.generate(
+      LLM.request({ model: cohere.model("command-a-03-2025"), prompt: "Hi" }),
+    ).pipe(Effect.provide(fixedResponse(sseEvents({ type: "message-start" }))), Effect.flip)
+    expect(error.message).toContain("without message-end")
+  }),
+)
+
+it.effect("Cohere preserves native tool plans in continued history", () =>
+  Effect.gen(function* () {
+    const response = yield* LLMClient.generate(
+      LLM.request({ model: cohere.model("command-a-03-2025"), prompt: "Hi" }),
+    ).pipe(
+      Effect.provide(
+        fixedResponse(
+          sseEvents(
+            { type: "message-start" },
+            { type: "tool-plan-delta", delta: { message: { tool_plan: "Look up the weather." } } },
+            {
+              type: "tool-call-start",
+              index: 0,
+              delta: { message: { tool_calls: { id: "lookup-1", function: { name: "lookup", arguments: "" } } } },
+            },
+            {
+              type: "tool-call-delta",
+              index: 0,
+              delta: { message: { tool_calls: { function: { arguments: '{"city":"Paris"}' } } } },
+            },
+            { type: "tool-call-end", index: 0 },
+            { type: "message-end", delta: { finish_reason: "TOOL_CALL" } },
+          ),
+        ),
+      ),
+    )
+    expect(response.toolCalls[0]?.input).toEqual({ city: "Paris" })
+    const prepared = yield* compileRequest(
+      LLM.request({
+        model: cohere.model("command-a-03-2025"),
+        messages: [response.message, Message.tool({ id: "lookup-1", name: "lookup", result: { sunny: true } })],
+      }),
+    )
+    expect(prepared.body.messages).toMatchObject([
+      { role: "assistant", tool_plan: "Look up the weather.", tool_calls: [{ id: "lookup-1" }] },
+      { role: "tool", tool_call_id: "lookup-1" },
+    ])
+  }),
+)
+
+it.effect("Cohere rejects unsupported media instead of silently dropping it", () =>
+  Effect.gen(function* () {
+    const error = yield* compileRequest(
+      LLM.request({
+        model: cohere.model("command-a-03-2025"),
+        messages: [Message.user([{ type: "media", media: Media.base64("Zm9v", "audio/wav") }])],
+      }),
+    ).pipe(Effect.flip)
+    expect(error.reason._tag).toBe("InvalidRequest")
+  }),
+)
+
+it.effect("Cohere thinking budgets must be positive integers", () =>
+  Effect.gen(function* () {
+    const error = yield* compileRequest(
+      LLM.request({
+        model: cohere.model("command-a-reasoning-08-2025"),
+        providerOptions: { thinking: { tokenBudget: 0 } },
+      }),
+    ).pipe(Effect.flip)
+    expect(error.reason._tag).toBe("InvalidRequest")
+  }),
+)
+
+it.effect("Cohere fits thinking budgets under the output limit", () =>
+  Effect.gen(function* () {
+    const prepared = yield* compileRequest(
+      LLM.request({
+        model: cohere.model("command-a-reasoning-08-2025"),
+        prompt: "Hi",
+        providerOptions: { thinking: { tokenBudget: 31_999 } },
+        generation: { maxTokens: 4096 },
+      }),
+    )
+    expect(prepared.body.thinking).toEqual({ type: "enabled", token_budget: 2048 })
+  }),
+)
+
+// Bodies captured live on 2026-10-02, except 402 and 429, which are Cohere's documented messages.
+const errors = [
+  { status: 401, message: "Incorrect API key provided: ***-123.", tag: "Authentication", retry: false },
+  { status: 404, message: "model 'no-such-model-xyz' not found", tag: "InvalidRequest", retry: false },
+  {
+    status: 400,
+    message: "invalid request: temperature must be between 0 and 2.0 inclusive.",
+    tag: "InvalidRequest",
+    retry: false,
+  },
+  {
+    status: 400,
+    error_type: "TOO_MANY_TOKENS",
+    message: "too many tokens: size limit exceeded by 168512 tokens. The limit for this model is 132000 tokens.",
+    tag: "InvalidRequest",
+    classification: "context-overflow",
+    retry: false,
+  },
+  {
+    status: 400,
+    error_type: "TOO_MANY_TOKENS",
+    message:
+      "too many tokens: max tokens must be less than or equal to 4096, the maximum output length for this model - received 1000000.",
+    tag: "InvalidRequest",
+    retry: false,
+  },
+  { status: 402, message: "Please add or update your payment method to continue", tag: "QuotaExceeded", retry: false },
+  {
+    status: 429,
+    message: "You are using a Trial key, which is limited to 40 API calls / minute.",
+    tag: "RateLimit",
+    retry: true,
+  },
+  { status: 500, message: "internal server error", tag: "ProviderInternal", retry: true },
+]
+
+it.effect("Cohere HTTP errors map to AI error reasons", () =>
+  Effect.forEach(errors, (item) =>
+    Effect.gen(function* () {
+      const error = yield* LLMClient.generate(
+        LLM.request({ model: cohere.model("command-a-03-2025"), prompt: "Hi" }),
+      ).pipe(
+        Effect.provide(
+          fixedResponse(JSON.stringify({ id: "fixture", error_type: item.error_type, message: item.message }), {
+            status: item.status,
+            headers: { "content-type": "application/json" },
+          }),
+        ),
+        Effect.flip,
+      )
+      expect({
+        message: error.message,
+        tag: error.reason._tag,
+        classification: error.reason._tag === "InvalidRequest" ? error.reason.classification : undefined,
+        retry: isRetryable(error),
+      }).toEqual({ message: item.message, tag: item.tag, classification: item.classification, retry: item.retry })
+    }),
+  ),
+)

packages/ai/test/provider/openai-chat.test.ts

@@ -2205,7 +2205,7 @@ describe("OpenAI Chat route", () => {
       )
 
       expect((yield* Ref.get(events)).some((event) => event.type === "text-delta")).toBeTrue()
-      expect(error.message).toBe("ECONNRESET: socket closed unexpectedly")
+      expect(error.message).toBe("Connection lost while reading the response: ECONNRESET: socket closed unexpectedly")
       expect(error.reason).toMatchObject({
         _tag: "Transport",
         transport: "http",
@@ -2223,7 +2223,7 @@ describe("OpenAI Chat route", () => {
         Effect.flip,
       )
 
-      expect(error.message).toBe("ECONNRESET: socket closed before output")
+      expect(error.message).toBe("Connection lost while reading the response: ECONNRESET: socket closed before output")
       expect(error.reason).toMatchObject({
         _tag: "Transport",
         transport: "http",

packages/app/component-tests/browser-pane-restore.spec.ts

@@ -0,0 +1,61 @@
+import { fileURLToPath } from "node:url"
+import { expect, story } from "../../storybook/playwright/story"
+
+const source = (path: string) => `/@fs/${fileURLToPath(new URL(path, import.meta.url)).replaceAll("\\", "/")}`
+const modules = {
+  fixture: source("../../gui-extensions/src/browser/panel.fixture.tsx"),
+  host: source("../src/runtime/extension/host.tsx"),
+  panels: source("../src/runtime/extension/panels.tsx"),
+  language: source("../src/runtime/i18n/language.tsx"),
+  browser: source("../../gui-extensions/src/browser/index.ts"),
+  browserRenderer: source("../../gui-extensions/src/browser/renderer.tsx"),
+  file: source("../../gui-extensions/src/file/index.ts"),
+  fileRenderer: source("../../gui-extensions/src/file/renderer.tsx"),
+}
+
+story(
+  "keeps a restored browser tab selected and undrawn until the desktop's first inventory",
+  async ({ mount, page }) => {
+    // Any story loads the app styles; the fixture mounts the real side region and extensions beside it.
+    await mount("ui-line-comment--editor")
+    await page.evaluate(async (modules) => {
+      const [{ mountBrowserRegion }, host, panels, language, browser, file] = await Promise.all([
+        import(modules.fixture),
+        import(modules.host),
+        import(modules.panels),
+        import(modules.language),
+        import(modules.browser),
+        import(modules.file),
+      ])
+      mountBrowserRegion({
+        LanguageProvider: language.LanguageProvider,
+        ExtensionHostProvider: host.ExtensionHostProvider,
+        useExtensionHost: host.useExtensionHost,
+        createRegion: panels.createRegion,
+        definitions: [
+          { ...browser.default, renderer: () => import(modules.browserRenderer) },
+          { ...file.default, renderer: () => import(modules.fileRenderer) },
+        ],
+      })
+    }, modules)
+    const root = page.getByTestId("browser-region-fixture")
+    const tabs = root.getByRole("tab")
+    const tree = root.getByTestId("tree")
+    await expect(root.getByText("Registrations: 1", { exact: true })).toBeVisible()
+    await expect(tabs).toHaveText(["alpha.ts"])
+    await expect(tree).toHaveText('{"tab":"changes"}')
+
+    // Beta was left on its browser tab, which the desktop has not reported yet.
+    await root.getByRole("button", { name: "Beta", exact: true }).click()
+    await expect(root.getByText("Registrations: 2", { exact: true })).toBeVisible()
+    await expect(root.getByTestId("selected")).toHaveText(/^browser:tab_/)
+    await expect(tabs).toHaveText(["beta.ts"])
+    // No fallback tab was selected, so the file tab's selection never switched the tree to All files.
+    await expect(tree).toHaveText('{"tab":"changes"}')
+
+    await root.getByRole("button", { name: "First inventory", exact: true }).click()
+    await expect(tabs).toHaveText(["beta.ts", "Preview"])
+    await expect(root.getByRole("tab", { name: "Preview", exact: true })).toHaveAttribute("aria-selected", "true")
+    await expect(tree).toHaveText('{"tab":"changes"}')
+  },
+)

packages/app/e2e/regression/composer.spec.ts

@@ -183,6 +183,35 @@ test("keeps a narrow session composer contained when invoking a built-in", async
   await expect(editor).toHaveText("keep me")
 })
 
+test("lists slash commands in their built-in order", async ({ page }) => {
+  const { editor } = await openSession(page, {
+    name: "ComposerSlash",
+    provider: NO_PROVIDER,
+    commands: [
+      { name: "init", description: "Create AGENTS.md" },
+      { name: "review", description: "Review changes" },
+    ],
+    // A sent message enables /undo, /compact and /fork.
+    pageMessages: () => ({ items: [{ id: "msg_slash", type: "user", text: "Hello", time: { created: T0 } }] }),
+  })
+  await editor.fill("/")
+  await expect(page.locator('[data-component="composer-suggestions"] [data-suggestion-id] bdi')).toHaveText([
+    "/init",
+    "/review",
+    "/new",
+    "/undo",
+    "/compact",
+    "/fork",
+    "/export",
+    "/open",
+    "/terminal",
+    "/mcp",
+    "/model",
+    "/connect",
+    "/btw",
+  ])
+})
+
 const followUp = "Add follow-up, / for commands, @ for context…"
 for (const row of [
   { state: "an idle", copy: "Ask anything, / for commands, @ for context…" },

packages/app/e2e/regression/mobile-extensions.spec.ts

@@ -37,6 +37,17 @@ test("mobile files browse, comment, search, and close tabs", async ({ page }) =>
   await expect.poll(() => fullWidth(comment)).toBe(true)
 
   await page.setViewportSize({ width: 390, height: 844 })
+  // Its composer chip reveals the comment without leaving the conversation.
+  const session = navigation.getByRole("tab", { name: "Session", exact: true })
+  await session.click()
+  await page
+    .locator('[data-component="composer-attachments"]')
+    .getByText("Full-width file comment", { exact: true })
+    .click()
+  await expect(session).toHaveAttribute("aria-selected", "true")
+  await expect(page.getByRole("textbox", { name: "Prompt", exact: true })).toBeVisible()
+  await navigation.getByRole("tab", { name: "Files", exact: true }).click()
+  await expect(files.getByText("contents:first.ts", { exact: true })).toBeVisible()
   const filter = files.getByRole("combobox", { name: "Filter files", exact: true })
   await expect(filter).toBeHidden()
   await files.getByRole("button", { name: "All files", exact: true }).click()

packages/app/e2e/regression/mobile-session.spec.ts

@@ -221,6 +221,54 @@ test("the summary's changes row switches the view and keeps the side tabs", asyn
 
   await page.setViewportSize({ width: 1280, height: 900 })
   await expect(readme).toHaveAttribute("aria-selected", "true")
+
+  // After a reload forgets the preview, a stored Open file tab is still the slot a narrow-screen file open replaces.
+  const launcher = panel.getByRole("tab", { name: "Open file", exact: true })
+  await panel.getByRole("button", { name: "Open file", exact: true }).click()
+  await expect(launcher).toHaveAttribute("aria-selected", "true")
+  await expect(readme).toHaveCount(0)
+  await page.reload()
+  await expect(launcher).toHaveAttribute("aria-selected", "true")
+  await page.setViewportSize({ width: 390, height: 844 })
+  await tabs.getByRole("tab", { name: "Files", exact: true }).click()
+  const files = page.locator('[data-slot="session-mobile-files"]')
+  await files.getByRole("button", { name: "README.md", exact: true }).click()
+  await expect(files.getByText("contents:README.md", { exact: true })).toBeVisible()
+  await page.setViewportSize({ width: 1280, height: 900 })
+  await expect(readme).toHaveAttribute("aria-selected", "true")
+  await expect(launcher).toHaveCount(0)
+})
+
+test("a narrow-screen palette pick keeps the view and dock, and the side region shows the file when wide", async ({
+  page,
+}) => {
+  await page.setViewportSize({ width: 390, height: 844 })
+  await mockStressTimeline(page, {
+    fileList: (path) => (path ? [] : [fileNode(fixture.directory, "README.md")]),
+    fileContent: (path) => ({ type: "text", content: `contents:${path}` }),
+    findFiles: ({ query }) => ("README.md".includes(query) ? [fileNode(fixture.directory, "README.md")] : []),
+    pty: {},
+  })
+  await openStress(page, { lastProject: { local: fixture.directory } })
+  await page.goto(sessionHref(fixture.targetID))
+
+  const tabs = page.getByRole("tablist", { name: "Session view", exact: true })
+  const terminal = page.locator("#terminal-panel")
+  await tabs.getByRole("tab", { name: "Terminal", exact: true }).click()
+  await expect(terminal.locator("textarea")).toBeEditable()
+  await page.keyboard.press("ControlOrMeta+p")
+  const dialog = page.getByRole("dialog")
+  await dialog.getByRole("textbox").fill("README")
+  await dialog.getByRole("option", { name: "/ README.md", exact: true }).click()
+  await expect(dialog).toHaveCount(0)
+  await expect(tabs.getByRole("tab", { selected: true })).toHaveText("Terminal")
+  await expect(terminal).toHaveAttribute("data-opened", "true")
+
+  await page.setViewportSize({ width: 1280, height: 900 })
+  await expect(terminal).toHaveAttribute("data-opened", "true")
+  const panel = page.locator("#review-panel")
+  await expect(panel.getByRole("tab", { name: "README.md", exact: true })).toHaveAttribute("aria-selected", "true")
+  await expect(panel.getByText("contents:README.md", { exact: true })).toBeVisible()
 })
 
 test.describe("touch", () => {

packages/app/e2e/regression/multi-server.spec.ts

@@ -90,6 +90,7 @@ test("settings opened from a remote session sweep every server and keep the remo
   await expect(page).toHaveURL("/settings")
   await expect(page.locator('[data-titlebar-tab][data-active="true"]')).toHaveCount(0)
   await expect(page.getByRole("dialog")).toHaveCount(0)
+  await expect(settings.getByRole("tab", { name: "Models", exact: true })).toHaveCount(0)
   await view.listed(REMOTE_SERVER, directoryB)
   await expect.poll(() => view.replies).toEqual([reply(sessionA.id, "permission-pending-a")])
 
@@ -112,6 +113,7 @@ test("settings opened from a remote session sweep every server and keep the remo
   await expect(page.locator('[data-titlebar-tab][data-active="true"]')).toContainText(sessionB.title)
   await page.keyboard.press("Control+]")
   await expect(page).toHaveURL("/settings")
+  await expect(settings.getByRole("tab", { name: "Preferences", exact: true })).toHaveAttribute("aria-selected", "true")
   await page.keyboard.press("Escape")
   await expectPath(page, sessionHref(sessionB.id, REMOTE_SERVER))
   await expectSessionTitle(page, sessionB.title)

packages/app/e2e/regression/patch-sticky-header.spec.ts

@@ -220,13 +220,16 @@ for (const scenario of scenarios) {
                 const top = sessionTop + (group?.getBoundingClientRect().height ?? 0)
                 const rect = element.getBoundingClientRect()
                 const trigger = element.querySelector("button")!
+                // The header stuck directly below the session title sits where the title's fade starts.
+                const hits = (target: Element, box: DOMRect) =>
+                  [box.top + 1, box.top + box.height / 2].every((y) =>
+                    target.contains(document.elementFromPoint(box.left + box.width / 2, y)),
+                  )
                 return {
                   gap: Math.abs(rect.top - top - (toolTitle?.getBoundingClientRect().height ?? 0)),
                   groupGap: group ? Math.abs(group.getBoundingClientRect().top - sessionTop) : 0,
                   titleGap: toolTitle ? Math.abs(toolTitle.getBoundingClientRect().top - top) : 0,
-                  clickable: trigger.contains(
-                    document.elementFromPoint(rect.left + rect.width / 2, rect.top + rect.height / 2),
-                  ),
+                  clickable: hits(trigger, rect) && (!group || hits(group, group.getBoundingClientRect())),
                 }
               }),
             )

packages/app/e2e/regression/review.spec.ts

@@ -1,12 +1,36 @@
 import type { OpenCodeEvent, SessionMessageInfo } from "@opencode/client/promise"
 import { expect, test, type Locator, type Page } from "@playwright/test"
 import { base64Encode } from "@opencode/util/encode"
-import { workspaceKey } from "../utils/app"
+import { SERVER, project, provider, session, workspaceKey } from "../utils/app"
+import { mockOpenCodeServer } from "../utils/mock-server"
 import { fileDiff, fileNode, openSession } from "../utils/workspace"
 import { expectSessionTitle } from "../utils/waits"
 
 test.use({ viewport: { width: 1440, height: 900 } })
 
+for (const view of ["desktop", "mobile"] as const) {
+  test(`offers Git initialization for a project without VCS (${view})`, async ({ page }) => {
+    if (view === "mobile") await page.setViewportSize({ width: 390, height: 844 })
+    const requests: { directory: string; provider?: string }[] = []
+    const workspace = await openSession(page, {
+      name: "ReviewWithoutGit",
+      project: { vcs: undefined },
+      onVcsInit: (input) => requests.push(input),
+    })
+    if (view === "desktop") await page.getByRole("button", { name: "Toggle review" }).click()
+    else await page.getByRole("tablist", { name: "Session view" }).getByRole("tab", { name: "Changes" }).click()
+
+    const panel = view === "desktop" ? page.locator("#review-panel") : page.locator('[data-component="session-review"]')
+    await expect(panel.getByText("Track, review, and undo changes in this project")).toBeVisible()
+    await expect(panel.getByRole("button", { name: "Git changes" })).toHaveCount(0)
+    const init = panel.getByRole("button", { name: "Create Git repository" })
+    await init.click()
+    await expect.poll(() => requests).toEqual([{ directory: workspace.directory, provider: "git" }])
+    await expect(panel.getByRole("button", { name: "Git changes" })).toBeVisible()
+    await expect(init).toHaveCount(0)
+  })
+}
+
 test("open file tab browses, searches, and tracks missing files", async ({ page }) => {
   const searches: { query: string; dirs?: string; limit?: number }[] = []
   const directory = "C:/OpenCode/ReviewOpenFile"
@@ -603,6 +627,65 @@ test("keeps the review state a session stored before extensions", async ({ page
   await expect(trigger("gamma.ts")).toBeVisible()
 })
 
+test("desktop review waits for the session's stored mode before it loads changes", async ({ page }) => {
+  const directory = "C:/OpenCode/ReviewDesktop"
+  const id = "ses_review_desktop"
+  const title = "Desktop review"
+  await mockOpenCodeServer(page, {
+    directory,
+    project: project({ id: "proj_review_desktop", directory }),
+    provider: provider(),
+    sessions: [session({ id, directory, title })],
+    pageMessages: () => ({ items: [] }),
+    vcs: { current: "feature", default: "dev" },
+    vcsDiff: ({ mode }) => (mode === "branch" ? [fileDiff("beta.ts")] : [fileDiff("gamma.ts")]),
+  })
+  const working: string[] = []
+  page.on("request", (request) => {
+    const url = new URL(request.url())
+    if (url.pathname.endsWith("/vcs/diff") && url.searchParams.get("mode") === "working") working.push(request.url())
+  })
+  const desktop = (hold?: string) =>
+    `/e2e/utils/settings-wsl.html?${new URLSearchParams({
+      server: SERVER,
+      mode: "stopped",
+      storage: "async",
+      path: `/server/${base64Encode("sidecar")}/session/${id}`,
+      ...(hold && { hold }),
+    })}`
+  const mode = (name: string) => page.getByRole("button", { name, exact: true })
+  const file = page.locator('[data-slot="session-review-v2-file-name"]')
+  const toggle = page.getByRole("button", { name: "Toggle review", exact: true })
+
+  await page.goto(desktop())
+  await expectSessionTitle(page, title)
+  await toggle.click()
+  await mode("Git changes").click()
+  await page.getByRole("option", { name: "Branch changes" }).click()
+  await expect(file).toHaveText("beta.ts")
+  await expect
+    .poll(() =>
+      page.evaluate(() =>
+        Object.entries(localStorage).some(
+          ([key, value]) => key.includes("extension.review.session") && value.includes('"branch"'),
+        ),
+      ),
+    )
+    .toBe(true)
+
+  // The reopened window's review mounts before its session store has loaded.
+  working.length = 0
+  await page.goto(desktop("extension.review.session"))
+  await expectSessionTitle(page, title)
+  await expect(toggle).toHaveAttribute("aria-expanded", "true")
+  await expect(page.locator("#review-panel").getByText("Loading changes…", { exact: true })).toBeVisible()
+  await expect(mode("Git changes")).toHaveCount(0)
+  await page.getByRole("button", { name: "Load held storage" }).click()
+  await expect(mode("Branch changes")).toBeVisible()
+  await expect(file).toHaveText("beta.ts")
+  expect(working).toEqual([])
+})
+
 for (const direction of ["ltr", "rtl"] as const) {
   test(`review toggle stays at the header edge in ${direction}`, async ({ page }) => {
     await page.setViewportSize({ width: 1000, height: 900 })

packages/app/e2e/regression/session-summary.spec.ts

@@ -25,7 +25,7 @@ for (const custom of [false, true]) {
     await expect(tooltip.locator('[data-slot="keybind-v2-label"]')).toHaveText(
       custom ? ["F8"] : mac ? ["⇧", "⌘", "Y"] : ["Ctrl", "Shift", "Y"],
     )
-    for (const id of [fixture.targetID, fixture.sourceID]) {
+    for (const id of [fixture.sourceID, fixture.targetID, fixture.sourceID]) {
       await page.locator(`[data-titlebar-tab-link][href="${sessionHref(id)}"]`).click()
       const messages = id === fixture.sourceID ? fixture.expected.sourceMessageIDs : fixture.expected.targetMessageIDs
       await expect(

packages/app/e2e/regression/settings-wsl.spec.ts

@@ -43,6 +43,27 @@ for (const mode of ["failed", "stopped", "ready"] as const) {
   })
 }
 
+test("adding a WSL server while the WSL extension is down shows that WSL is unavailable", async ({ page }) => {
+  await mockOpenCodeServer(page, {
+    directory: "/repo",
+    project: project({ id: "proj_wsl_unavailable", directory: "/repo", name: "WSL project" }),
+    provider: NO_PROVIDER,
+    sessions: [],
+    pageMessages: () => ({ items: [] }),
+  })
+  await page.goto(`/e2e/utils/settings-wsl.html?${new URLSearchParams({ server: SERVER, mode: "ready" })}`)
+  const settings = page.getByTestId("settings-screen")
+  await expect(settings.getByRole("tab", { name: "Ubuntu", exact: true })).toHaveCount(1)
+  await page.getByRole("checkbox", { name: "WSL extension" }).uncheck()
+
+  await settings.getByRole("button", { name: "Add server", exact: true }).press("Enter")
+  await page.getByRole("menuitem", { name: "Add WSL server", exact: true }).click()
+  const dialog = page.getByRole("dialog")
+  await expect(dialog.getByRole("heading", { name: "WSL unavailable", exact: true })).toBeVisible()
+  await expect(dialog.getByText("OpenCode could not verify WSL on this machine.", { exact: true })).toBeVisible()
+  await expect(dialog.getByText("WSL is unavailable", { exact: true })).toBeVisible()
+})
+
 test("an open session's terminal follows its WSL server to the endpoint it restarts on", async ({ page }) => {
   const restarted = "http://127.0.0.1:4098"
   const directory = "/home/ubuntu/project"
@@ -131,6 +152,50 @@ test("WSL session and draft tabs outlive the extension going away until the serv
   await expect(tabs).toHaveCount(0)
 })
 
+test("an SSH host that asks for sign-in again opens the dialog once per selected tab", async ({ page }) => {
+  const directory = "/home/box/project"
+  const box = session({ id: "ses_ssh_offer", directory, title: "SSH offer session" })
+  const config = {
+    directory,
+    project: project({ id: "proj_ssh_offer", directory }),
+    provider: provider(),
+    sessions: [box],
+    pageMessages: () => ({ items: [] }),
+  }
+  await mockServers(page, { [SERVER]: { ...config, sessions: [] }, [REMOTE_SERVER]: config })
+  const path = `/server/${base64Encode("ssh:box")}/session/${box.id}`
+  await page.goto(
+    `/e2e/utils/settings-wsl.html?${new URLSearchParams({ server: SERVER, mode: "ready", ssh: REMOTE_SERVER, path })}`,
+  )
+  await expectSessionTitle(page, box.title)
+  const connects = page.getByLabel("SSH connects")
+  const signIn = page.getByRole("button", { name: "Require SSH sign-in" })
+  const authenticate = page.getByRole("button", { name: "Authenticate", exact: true })
+
+  // The first request on the tab opens sign-in by itself; the fixture's host connects without a prompt.
+  await signIn.click()
+  await expect(connects).toHaveText("1")
+  await expectSessionTitle(page, box.title)
+  // A later request on the same tab only offers the button.
+  await signIn.click()
+  await expect(authenticate).toBeVisible()
+  await expect(connects).toHaveText("1")
+  await authenticate.click()
+  await expect(connects).toHaveText("2")
+  await expectSessionTitle(page, box.title)
+
+  // Another tab selected and this one selected again is a new selection, even while the host was ready.
+  const tabs = page.locator("a[data-titlebar-tab-link]")
+  await page.getByRole("button", { name: "New session", exact: true }).click()
+  await expect(tabs).toHaveCount(2)
+  await expect(tabs.nth(1)).toHaveAttribute("href", /^\/new-session\?draftId=/)
+  await expect(page.getByRole("heading", { name: box.title })).toHaveCount(0)
+  await tabs.nth(0).click()
+  await expectSessionTitle(page, box.title)
+  await signIn.click()
+  await expect(connects).toHaveText("3")
+})
+
 test("an open session moves to the controller a new SSH sign-in creates", async ({ page }) => {
   const directory = "/home/box/project"
   const model = { id: "box-model", name: "Box Model" }

packages/app/e2e/regression/settings.spec.ts

@@ -1,7 +1,7 @@
 import { expect, test, type Page } from "@playwright/test"
 import type { ConfigEntry, OpenCodeEvent, WorktreeDirectory } from "@opencode/client/promise"
 import { NO_PROVIDER, REMOTE_SERVER, SERVER, holdRoute, project, session } from "../utils/app"
-import { mockRemoteServer, openSettings, type WorkspaceInput } from "../utils/workspace"
+import { mockRemoteServer, mockWorkspace, openSettings, type WorkspaceInput } from "../utils/workspace"
 
 const directory = "C:/Projects/settings-demo"
 const projectID = "proj_settings_demo"
@@ -65,6 +65,20 @@ test("settings has its own route and returns through app history", async ({ page
   await expect(settings).toBeHidden()
 })
 
+test("Ctrl+, opens settings as soon as the app loads", async ({ page }) => {
+  await mockWorkspace(page, {
+    name: "Settings demo",
+    directory,
+    provider: NO_PROVIDER,
+    sessions: [],
+    seed: { tabs: [] },
+  })
+  await page.goto("/")
+  await page.keyboard.press("Control+,")
+  await expect(page.getByTestId("settings-screen")).toBeVisible()
+  await expect(page).toHaveURL("/settings")
+})
+
 test("a settings page survives refresh", async ({ page }) => {
   const { settings } = await open(page)
   const appearance = settings.getByRole("tab", { name: "Appearance", exact: true })

packages/app/e2e/regression/side-panels.spec.ts

@@ -200,9 +200,11 @@ test("terminal stacks under review by default and spans the bottom when configur
   await expect
     .poll(() =>
       page.evaluate(() => {
-        const review = document.querySelector("#review-panel")!.getBoundingClientRect()
-        const terminal = document.querySelector("#terminal-panel")!.getBoundingClientRect()
-        const sidebar = document.querySelector('#review-panel [data-slot="session-review-v2-sidebar"]')!
+        const review = document.querySelector("#review-panel")?.getBoundingClientRect()
+        const terminal = document.querySelector("#terminal-panel")?.getBoundingClientRect()
+        const sidebar = document.querySelector('#review-panel [data-slot="session-review-v2-sidebar"]')
+        // The side region appears before its lazy review content after reload.
+        if (!review || !terminal || !sidebar) return false
         const gap = terminal.top - review.bottom
         return (
           terminal.left <= 9 &&

packages/app/e2e/regression/timeline-stream.spec.ts

@@ -543,6 +543,26 @@ test.describe("Working", () => {
     await expect(working).toHaveCount(0)
   })
 
+  test("keeps Working instead of Used 1 Thought while reasoning is the only activity", async ({ page }) => {
+    const timeline = await setupTimeline(page, {
+      messages: [
+        userMessage(),
+        assistantMessage([reasoningPart("prt_only_thought", "Still considering the answer.")], { completed: false }),
+      ],
+      settings: { timelineDetail: detailed },
+    })
+    const working = page.locator('[data-component="session-working"]')
+    const group = page.locator('[data-component="collapsed-tool-group"]')
+    await expect(working).toBeVisible()
+    await expect(group).toHaveCount(0)
+    await expect(page.getByRole("button", { name: "Used 1 Thought" })).toHaveCount(0)
+
+    await timeline.send(partUpdated(toolPart("prt_after_thought", "read", "running", { filePath: "package.json" })))
+    await expect(group).toBeVisible()
+    await expect(group).toHaveAttribute("data-timeline-part-ids", `${assistantID}:reasoning:0,prt_after_thought`)
+    await expect(working).toBeVisible()
+  })
+
   for (const name of ["shell", "patch", "subagent"] as const) {
     test(`hides Working during ${name} input and execution, then restores it on completion`, async ({ page }) => {
       const timeline = await setupTimeline(page, {

packages/app/e2e/utils/mock-api.ts

@@ -169,6 +169,7 @@ const Group = HttpApiGroup.make("mock")
   )
   .add(HttpApiEndpoint.get("formRequests", "/api/form", { success: Json }))
   .add(HttpApiEndpoint.get("vcs", "/api/vcs", { success: Json }))
+  .add(HttpApiEndpoint.post("vcsInit", "/api/vcs/init", { success: NoContent, error: Unsupported }))
   .add(HttpApiEndpoint.get("vcsStatus", "/api/vcs/status", { success: Json }))
   .add(HttpApiEndpoint.get("vcsBranches", "/api/vcs/branch", { success: Json }))
   .add(HttpApiEndpoint.get("vcsDiff", "/api/vcs/diff", { query: Query, success: Json }))

packages/app/e2e/utils/mock-server.ts

@@ -43,6 +43,8 @@ export interface MockServerConfig {
     cursor?: string
   }
   vcs?: { current: string; default: string }
+  // Initializes the mock project's VCS; without a handler this mutation answers 501.
+  onVcsInit?: (input: { directory: string; provider?: string }) => void
   vcsDiff?: unknown[] | ((input: { mode?: string }) => unknown[])
   // Benchmark latency only. Tests hold message pages with `beforeMessagesResponse`.
   messageDelay?: number
@@ -817,6 +819,24 @@ function mockHandlers(
             location: location(config),
             data: { branch: config.vcs ?? { current: "main", default: "main" } },
           }),
+        vcsInit: (ctx) => {
+          if (!config.onVcsInit) return unsupported("initialize VCS", "onVcsInit")
+          return Effect.sync(() => {
+            const url = new URL(ctx.request.url, "http://localhost")
+            const provider = url.searchParams.get("provider") ?? undefined
+            config.onVcsInit?.({ directory: requestDirectory(config, ctx.request), provider })
+            const project = config.project as { id: string; vcs?: string }
+            project.vcs = provider ?? "git"
+            state.emit([
+              {
+                id: "evt_vcs_initialized",
+                type: "worktree.updated",
+                created: Date.now(),
+                data: { projectID: project.id },
+              },
+            ])
+          }).pipe(Effect.andThen(noContent))
+        },
         vcsStatus: () => Effect.succeed({ location: location(config), data: [] }),
         vcsBranches: () => Effect.succeed({ location: location(config), data: ["main"] }),
         vcsDiff: (ctx) =>

packages/app/e2e/utils/settings-wsl.fixture.tsx

@@ -10,9 +10,10 @@ import { PlatformProvider, type Platform } from "../../src/runtime/platform/plat
 import { ServerConnection } from "../../src/runtime/server/registry"
 import { useExtensionServers } from "../../src/runtime/extension/servers"
 
-// `wsl` is the Ubuntu server's endpoint (default `server`); updating OpenCode restarts it on `restart` (default `wsl`).
-// `ssh` adds a saved SSH server `box`, ready on that endpoint with password `ssh-1`; each connect brings up a new
-// remote server with the next password (`ssh-2`, ...).
+// A desktop window. `wsl` is the Ubuntu server's endpoint (default `server`); updating OpenCode restarts it on `restart`
+// (default `wsl`). `ssh` adds a saved SSH server `box`, ready on that endpoint with password `ssh-1`; each connect
+// brings up a new remote server with the next password (`ssh-2`, ...). `storage=async` stores in localStorage behind
+// asynchronous reads like the desktop app's; reads of keys containing `hold` wait for "Load held storage".
 export function mount(input: {
   server: string
   mode: "failed" | "stopped" | "ready"
@@ -20,6 +21,8 @@ export function mount(input: {
   restart?: string | null
   path?: string | null
   ssh?: string | null
+  storage?: string | null
+  hold?: string | null
 }) {
   const root = document.getElementById("root")
   if (!root) throw new Error("Missing fixture root")
@@ -27,14 +30,28 @@ export function mount(input: {
   history.set({ value: input.path ?? "/settings", replace: true, scroll: false })
   const endpoint = { url: input.wsl ?? input.server }
   const ready = () => ({ kind: "ready" as const, url: endpoint.url, password: null })
+  const held = Promise.withResolvers<void>()
+  const storage = (name?: string) => {
+    const item = (key: string) => (name ? `${name}:${key}` : key)
+    return {
+      getItem: async (key: string) => {
+        if (input.hold && key.includes(input.hold)) await held.promise
+        return localStorage.getItem(item(key))
+      },
+      setItem: async (key: string, value: string) => localStorage.setItem(item(key), value),
+      removeItem: async (key: string) => localStorage.removeItem(item(key)),
+    }
+  }
   render(() => {
     const [store, setStore] = createStore<{
       calls: string[]
+      connects: number
       available: boolean
       state: WslServersState
       ssh: SshState
     }>({
       calls: [],
+      connects: 0,
       available: true,
       ssh: {
         revision: 0,
@@ -95,7 +112,6 @@ export function mount(input: {
         revision: state.revision + 1,
         servers: state.servers.map((server) => ({ ...server, ...item })),
       }))
-    const connects = { count: 1 }
     const methods: Record<string, Record<string, (input: { id?: string; name?: string }) => unknown>> = {
       wsl: {
         // Like main: stops the distro's server, updates OpenCode, then starts the server again on a new endpoint.
@@ -126,8 +142,8 @@ export function mount(input: {
       ssh: {
         // Like main: a connect opens a new tunnel to a remote server with a new password.
         start() {
-          connects.count += 1
-          setSsh({ stage: "ready", http: { url: input.ssh ?? "", password: `ssh-${connects.count}` } })
+          setStore("connects", (count) => count + 1)
+          setSsh({ stage: "ready", http: { url: input.ssh ?? "", password: `ssh-${store.connects + 1}` } })
           return store.ssh.revision
         },
       },
@@ -175,6 +191,7 @@ export function mount(input: {
       notify: async () => undefined,
       restart: unused,
       extensions: bridge,
+      ...(input.storage === "async" ? { storage } : {}),
     }
     function Interface() {
       const extensions = useExtensionServers()
@@ -221,6 +238,22 @@ export function mount(input: {
             >
               Drop SSH tunnel
             </button>
+            {/* A background reconnect that needs a password, as main reports it to every window. */}
+            <button
+              type="button"
+              onClick={() => {
+                setSsh({ stage: "authentication" })
+                publish("ssh")
+              }}
+            >
+              Require SSH sign-in
+            </button>
+            <output aria-label="SSH connects">{store.connects}</output>
+          </Show>
+          <Show when={input.hold}>
+            <button type="button" onClick={() => held.resolve()}>
+              Load held storage
+            </button>
           </Show>
           <Interface />
         </AppBaseProviders>

packages/app/e2e/utils/settings-wsl.html

@@ -15,6 +15,8 @@
         restart: query.get("restart"),
         path: query.get("path"),
         ssh: query.get("ssh"),
+        storage: query.get("storage"),
+        hold: query.get("hold"),
       })
     </script>
   </body>

packages/app/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@opencode/app",
-  "version": "2.0.21",
+  "version": "2.0.22",
   "description": "",
   "type": "module",
   "exports": {

packages/app/src/composer/model.ts

@@ -448,8 +448,8 @@ function openComment(
       })
     })
   }
-  // The extension that owns the comment's origin reveals it (the review diff or a file tab).
-  links.open({ href: item.path, origin: item.commentOrigin, exact: true, session })
+  // The extension that owns the comment's origin reveals it (the review diff or a file tab), keeping the conversation.
+  links.open({ href: item.path, origin: item.commentOrigin, exact: true, background: true, session })
   if (item.commentOrigin === "review") return queueFocus()
   void Promise.resolve(files.load(item.path)).finally(() => queueFocus())
 }

packages/app/src/runtime/extension/commands.tsx

@@ -1,3 +1,4 @@
+import { createMemo } from "solid-js"
 import { Command } from "@opencode/gui-extensions/sdk"
 import { useCommand } from "@/shell/commands/command"
 import { useSettings } from "@/settings/model"
@@ -9,27 +10,34 @@ export function ExtensionCommands() {
   const host = useExtensionHost()
   const command = useCommand()
   migrateKeybinds(useSettings())
+  // Extensions activate in whatever order their entries load; list them in definition order, then registration order.
+  const rank = createMemo(() => new Map(host.definitions().map((definition, index) => [definition.id, index])))
+  const order = (extension: string) => rank().get(extension) ?? rank().size
   command.register("extensions", () =>
-    host.items(Command).map((item) => ({
-      id: `${item.extension}.${item.value.id}`,
-      title: item.value.title,
-      description: item.value.description,
-      category: item.value.group,
-      section: item.value.section,
-      keybind: item.value.bind,
-      slash: item.value.slash?.name,
-      slashArguments: item.value.slash?.arguments,
-      suggested: item.value.suggested,
-      featured: item.value.featured,
-      disabled: item.value.enabled === false,
-      hidden: item.value.hidden,
-      editable: item.value.editable,
-      when: item.value.scope
-        ? (event: KeyboardEvent) =>
-            event.target instanceof Element && !!event.target.closest(item.value.scope as string)
-        : undefined,
-      onSelect: (_source: unknown, input?: string) => item.value.run(input),
-    })),
+    host
+      .items(Command)
+      .toSorted((a, b) => order(a.extension) - order(b.extension))
+      .map((item) => ({
+        id: `${item.extension}.${item.value.id}`,
+        title: item.value.title,
+        description: item.value.description,
+        category: item.value.group,
+        section: item.value.section,
+        keybind: item.value.bind,
+        slash: item.value.slash?.name,
+        slashArguments: item.value.slash?.arguments,
+        slashAfter: item.value.slash?.after,
+        suggested: item.value.suggested,
+        featured: item.value.featured,
+        disabled: item.value.enabled === false,
+        hidden: item.value.hidden,
+        editable: item.value.editable,
+        when: item.value.scope
+          ? (event: KeyboardEvent) =>
+              event.target instanceof Element && !!event.target.closest(item.value.scope as string)
+          : undefined,
+        onSelect: (_source: unknown, input?: string) => item.value.run(input),
+      })),
   )
   return null
 }

packages/app/src/runtime/extension/panels.tsx

@@ -137,9 +137,12 @@ export function createRegion(input: { region: Panel["region"]; view: SessionView
     ]
   })
 
+  // Narrow screens never select a launcher: a stored one falls back like a missing tab.
+  const desktop = createMediaQuery("(min-width: 768px)")
   const active = createMemo(() => {
     const value = input.tabs().active()
-    if (value && strip().some((entry) => entry.key === value)) return value
+    if (value && strip().some((entry) => entry.key === value && (desktop() || entry.tab.kind !== "launcher")))
+      return value
     return strip()
       .filter((entry) => entry.tab.fallback !== undefined)
       .reduce<RegionEntry | undefined>(
@@ -157,10 +160,13 @@ export function createRegion(input: { region: Panel["region"]; view: SessionView
     }),
   )
 
+  // Hidden tabs keep their place in the strip for selection, focus, and close, but draw no trigger.
+  const drawn = createMemo(() => strip().filter((entry) => !entry.tab.hidden))
+
   return {
     entries,
-    /** Strip order by key. Renders iterate keys so a provider's fresh tab objects never remount a trigger. */
-    keys: createMemo(() => strip().map((entry) => entry.key), [], { equals: same }),
+    /** Drawn strip order by key. Renders iterate keys so a provider's fresh tab objects never remount a trigger. */
+    keys: createMemo(() => drawn().map((entry) => entry.key), [], { equals: same }),
     entry: (key: string) => byKey().get(key),
     active,
     selected: createMemo(() => {
@@ -171,7 +177,7 @@ export function createRegion(input: { region: Panel["region"]; view: SessionView
     /** An extension's tab ids in the stored strip. */
     openFor: (extension: string) =>
       stored().flatMap((key) => (key.startsWith(`${extension}:`) ? [key.slice(extension.length + 1)] : [])),
-    lead: () => !!strip().find((entry) => entry.tab.kind !== "pinned")?.tab.first,
+    lead: () => !!drawn().find((entry) => entry.tab.kind !== "pinned")?.tab.first,
     select(key: string) {
       input.tabs().setActive(key)
     },
@@ -219,7 +225,7 @@ export function RegionContent(props: {
                 <div
                   id={member()?.tab.dom?.panel}
                   role="tabpanel"
-                  aria-labelledby={active() ? member()?.tab.dom?.tab : undefined}
+                  aria-labelledby={active() && !member()?.tab.hidden ? member()?.tab.dom?.tab : undefined}
                   data-slot="tabs-content"
                   class="h-full min-h-0 overflow-hidden"
                   classList={{ hidden: !active() }}
@@ -251,7 +257,7 @@ export function RegionContent(props: {
                 <div
                   id={entry()?.tab.dom?.panel}
                   role="tabpanel"
-                  aria-labelledby={entry()?.tab.dom?.tab}
+                  aria-labelledby={entry()?.tab.hidden ? undefined : entry()?.tab.dom?.tab}
                   tabIndex={entry()?.tab.tabbable ? 0 : undefined}
                   data-slot="tabs-content"
                   class="flex flex-col h-full overflow-hidden contain-strict"

packages/app/src/runtime/extension/services.tsx

@@ -81,7 +81,9 @@ export function createExtensionServices() {
   const platform = usePlatform()
   const dialog = useDialog()
   const language = useLanguage()
-  const narrow = createMediaQuery("(max-width: 767px)")
+  // The session screen's breakpoint, negated, so no fractional width is both narrow and desktop.
+  const desktop = createMediaQuery("(min-width: 768px)")
+  const narrow = () => !desktop()
   const [attached, setAttached] = createSignal<Attached>()
   const removed = new Set<(value: { server: string; directory: string }) => void>()
   const memory = new Map<string, readonly [Store<object>, (mutation: (draft: object) => void) => void]>()
@@ -286,12 +288,11 @@ export function createExtensionAttachment(services: ExtensionServices) {
   const host = useExtensionHost()
   const command = useCommand()
   const location = useLocation()
-  const narrow = createMediaQuery("(max-width: 767px)")
+  const desktop = createMediaQuery("(min-width: 768px)")
+  const narrow = () => !desktop()
   const views = new Map<string, SessionView>()
   const [mounted, setMounted] = createStore({ revision: 0 })
   const refs = new Map<string, SessionRef>()
-  // The panel whose toggle opened a session's side region, by session key.
-  const openedFor = new Map<string, string>()
 
   const connection = (id: string) => global.servers.list().find((item) => ServerConnection.key(item) === id)
 
@@ -371,11 +372,15 @@ export function createExtensionAttachment(services: ExtensionServices) {
     return Array.from(refs.values())
   })
 
-  const current = createMemo(() => {
+  const routed = createMemo(() => {
     const value = route()
-    if (value.type !== "session") return
+    return value.type === "session" ? `${value.server}\n${value.sessionId}` : undefined
+  })
+  const current = createMemo(() => {
+    const key = routed()
+    if (!key) return
     void mounted.revision
-    return views.get(`${value.server}\n${value.sessionId}`)
+    return views.get(key)
   })
 
   const scope = (id: string) => {
@@ -398,13 +403,19 @@ export function createExtensionAttachment(services: ExtensionServices) {
   const sideOpened = (session: SessionRef) => !!tabs.pane(shellTab(session), "side")
   const dockOpened = (session: SessionRef) => !!tabs.pane(shellTab(session), "dock")
   const setDock = (session: SessionRef, opened: boolean) => tabs.setPane(shellTab(session), "dock", opened)
-  // However the side region closes, it forgets its opener, so a region reopened any other way belongs to the user.
-  createEffect(() => {
-    const open = new Set(sessions().flatMap((session) => (sideOpened(session) ? [session.key] : [])))
-    Array.from(openedFor.keys()).forEach((key) => {
-      if (!open.has(key)) openedFor.delete(key)
-    })
-  })
+  // A token per session whose side region is open, new each time the region opens.
+  const sideVisits = createMemo<ReadonlyMap<string, object>>(
+    (previous) =>
+      new Map(
+        sessions().flatMap((session) =>
+          sideOpened(session) ? [[session.key, previous.get(session.key) ?? {}] as const] : [],
+        ),
+      ),
+    new Map(),
+  )
+  // The panel whose toggle opened a side region, by the region's token. However the region closes, it reopens with
+  // a new token, so a region reopened any other way belongs to the user.
+  const openedFor = new WeakMap<object, string>()
 
   // Keys are `${extension}:${tab id}`; the extension's panel decides the region.
   const provider = (key: string) => {
@@ -417,19 +428,18 @@ export function createExtensionAttachment(services: ExtensionServices) {
     return view?.key === session.key ? view : undefined
   }
 
-  // The narrow-screen view belongs to the routed, mounted session: it resets to the conversation when that session
-  // changes or unmounts (e.g. on Home). The dock's view follows the dock's own per-session state instead.
-  const [mobile, setMobile] = createStore({ session: undefined as string | undefined, view: "session" })
-  createEffect(
-    on(
-      () => current()?.key,
-      (key) => {
-        if (key !== mobile.session) setMobile({ session: undefined, view: "session" })
-      },
-    ),
+  // Counts routing visits: each change of the routed session, including to none (e.g. Home), starts the next one.
+  const visit = createMemo(on(routed, (_key, _previous, count: number = 0) => count + 1))
+  // The narrow-screen view belongs to the routed, mounted session for one visit, and reads as the conversation once
+  // another visit starts. A view selected for a session that is not routed (e.g. a file link that opens Files on
+  // another session) belongs to the next visit, which the navigation that follows starts. The dock's view follows
+  // the dock's own per-session state instead.
+  const [mobile, setMobile] = createStore({ session: undefined as string | undefined, view: "session", visit: 0 })
+  const mobileView = createMemo(() =>
+    mobile.session === current()?.key && mobile.visit === visit() ? mobile.view : "session",
   )
-  const mobileView = createMemo(() => (mobile.session === current()?.key ? mobile.view : "session"))
-  const selectMobile = (session: SessionRef, view: string) => setMobile({ session: session.key, view })
+  const selectMobile = (session: SessionRef, view: string) =>
+    setMobile({ session: session.key, view, visit: session.key === routed() ? visit() : visit() + 1 })
 
   // The side tabs a mounted session lists right now, plus `adding` as if it were stored; unmounted sessions have none.
   const listed = (session: SessionRef, value: string, adding?: string) => {
@@ -449,20 +459,17 @@ export function createExtensionAttachment(services: ExtensionServices) {
     )
   }
 
-  const open = (
-    key: string,
-    session: SessionRef,
-    options?: { readonly preview?: boolean; readonly focus?: boolean; readonly select?: boolean },
-  ) => {
+  const open = (key: string, session: SessionRef, options?: Parameters<Layout["open"]>[2]) => {
     const item = provider(key)
     if (item?.value.region === "dock") return setDock(session, true)
     const value = stateKey(session)
     if (!value) return
     // focus: false adds the tab quietly: no selection, no region change, no preview replacement.
     if (options?.focus === false && !options.preview) return layout.panel.append(value, key)
+    // A select keeps the narrow-screen view and dock, as a background open does, and opens the side region too.
     if (options?.select)
       return batch(() => {
-        if (!narrow()) tabs.setPane(shellTab(session), "side", true)
+        tabs.setPane(shellTab(session), "side", true)
         layout.panel.append(value, key)
         layout.panel.focus(value, key)
       })
@@ -471,13 +478,14 @@ export function createExtensionAttachment(services: ExtensionServices) {
     const launchers = new Set(known.flatMap((entry) => (entry.tab.kind === "launcher" ? [entry.key] : [])))
     const first = known.some((entry) => entry.key === key && entry.tab.first)
     batch(() => {
-      if (narrow()) {
+      if (narrow() && !options?.background) {
         setDock(session, false)
         if (item?.value.mobile) selectMobile(session, `${item.extension}:${item.value.id}`)
-        // A tab its panel does not list on narrow screens stays unstored: the open only selects the panel's view.
-        if (mountedView(session) && !known.some((entry) => entry.key === key)) return
+        // A tab its panel does not list, or a launcher, stays unstored: the open only selects the panel's view.
+        if (mountedView(session) && !known.some((entry) => entry.key === key && entry.tab.kind !== "launcher")) return
       }
-      if (!narrow()) tabs.setPane(shellTab(session), "side", true)
+      // A background open keeps the narrow-screen view, but its tab still shows once the window is wide.
+      if (!narrow() || options?.background) tabs.setPane(shellTab(session), "side", true)
       // Pinned tabs are listed without being stored; opening one only selects it.
       if (known.some((entry) => entry.key === key && entry.tab.kind === "pinned")) return layout.panel.focus(value, key)
       if (options?.preview) return layout.panel.preview(value, key, launchers)
@@ -569,19 +577,21 @@ export function createExtensionAttachment(services: ExtensionServices) {
         if (provider(key)?.value.region === "dock") return setDock(session, !dockOpened(session))
         const value = stateKey(session)
         if (!value) return
+        const region = sideVisits().get(session.key)
         if (state(key, session) === "visible") {
           batch(() => {
             close(key, session)
             // Closing the last panel the region was opened for also closes the region.
-            if (openedFor.get(session.key) === key && layout.panel.state(value).all.length === 0)
+            if (region && openedFor.get(region) === key && layout.panel.state(value).all.length === 0)
               tabs.setPane(shellTab(session), "side", false)
           })
           return
         }
-        const opening = !sideOpened(session)
-        if (!opening) openedFor.delete(session.key)
+        // A panel opened into an open region makes the region the user's.
+        if (region) openedFor.delete(region)
         open(key, session)
-        if (opening && sideOpened(session)) openedFor.set(session.key, key)
+        const opened = sideVisits().get(session.key)
+        if (!region && opened) openedFor.set(opened, key)
       },
       state,
       stored(extension, session) {

packages/app/src/runtime/extension/surface.tsx

@@ -5,6 +5,9 @@ import { createResizeObserver } from "@solid-primitives/resize-observer"
 import type { SurfaceProps, Surfaces } from "@opencode/gui-extensions/sdk"
 import type { Bridge } from "@opencode/gui-extensions/sdk/bridge"
 
+const geometry =
+  /^(inset|left|right|top|bottom|translate|transform|scale|rotate|margin|padding|flex|grid|gap|row-gap|column-gap)|(^|-)(width|height)$/
+
 type Input = {
   readonly bridge: Bridge | undefined
   readonly zoom: () => number
@@ -164,6 +167,14 @@ function SurfaceView(props: SurfaceProps & { input: Input; bridge: Bridge }) {
   // animation frame keeps the native view in step with a pane drag.
   createResizeObserver(() => element, measure)
   createEventListener(window, "resize", () => schedule(300))
+  // A layout transition elsewhere, such as the chat column's width while the side pane opens, can
+  // move the box without resizing it. Track it from when it actually runs, and settle on its end.
+  createEventListener(document, "transitionrun", (event) => {
+    if (geometry.test(event.propertyName)) schedule(300)
+  })
+  createEventListener(document, ["transitionend", "transitioncancel"], (event) => {
+    if (geometry.test(event.propertyName)) schedule()
+  })
   // Floating content portals directly into <body>; keep measuring briefly so
   // the positioner has settled before the overlap check runs.
   const portals = new MutationObserver(() => schedule(300))

packages/app/src/session/session-identity-header.tsx

@@ -30,12 +30,17 @@ import "./session-identity-header.css"
 
 export function SessionTitleHeader(props: ParentProps) {
   return (
-    <div
-      data-session-title
-      class="sticky top-0 z-30 w-full bg-[linear-gradient(to_bottom,var(--v2-background-bg-base)_48px,transparent)] pb-4 pe-3 ps-2.5"
-    >
-      {props.children}
-    </div>
+    <>
+      {/* The bottom inset reserves room for the fade without covering rows stuck below the bar. */}
+      <div data-session-title class="pointer-events-none sticky top-0 z-30 w-full pb-4">
+        <div class="pointer-events-auto bg-v2-background-bg-base pe-3 ps-2.5">{props.children}</div>
+      </div>
+      {/* Stuck timeline headers stack above this fade, so it only fades content scrolling under the bar. */}
+      <div
+        aria-hidden="true"
+        class="pointer-events-none sticky top-12 z-[5] -mt-4 h-4 w-full bg-[linear-gradient(to_bottom,var(--v2-background-bg-base),transparent)]"
+      />
+    </>
   )
 }
 

packages/app/src/shell/commands/command.tsx

@@ -89,6 +89,8 @@ export interface CommandOption {
   keybind?: KeybindConfig
   slash?: string
   slashArguments?: boolean
+  /** Listed right after the option whose slash name this is, when one is registered. */
+  slashAfter?: string
   suggested?: boolean
   /** Listed when the command palette opens without a query. Host commands are listed by id instead. */
   featured?: boolean
@@ -146,6 +148,22 @@ export function activeCommandRegistrations(registrations: CommandRegistration[])
   })
 }
 
+// Each option with `slashAfter` follows the first option with that slash name, so a command from another
+// registration can sit inside that registration's slash list.
+function placeAfterSlash(options: CommandOption[]) {
+  const anchors = new Map<string, CommandOption>()
+  options.forEach((option) => {
+    if (option.slash && !option.slashAfter && !anchors.has(option.slash)) anchors.set(option.slash, option)
+  })
+  const moved = options.filter((option) => option.slashAfter && anchors.has(option.slashAfter))
+  if (moved.length === 0) return options
+  return options.flatMap((option) => {
+    if (moved.includes(option)) return []
+    if (!option.slash || anchors.get(option.slash) !== option) return [option]
+    return [option, ...moved.filter((item) => item.slashAfter === option.slash)]
+  })
+}
+
 export function parseKeybind(config: string): Keybind[] {
   if (!config || config === "none") return []
 
@@ -313,7 +331,7 @@ export const { use: useCommand, provider: CommandProvider } = createSimpleContex
         }
       }
 
-      return all
+      return placeAfterSlash(all)
     })
 
     createEffect(() => {

packages/app/src/shell/commands/palette.ts

@@ -64,7 +64,7 @@ export function createCommandPaletteFileOpener(onOpenFile?: (path: string) => vo
   const extensions = useExtensionAttachment()
 
   return (path: string) => {
-    links.open({ href: path, exact: true, session: extensions.current() })
+    links.open({ href: path, exact: true, background: true, session: extensions.current() })
     onOpenFile?.(path)
   }
 }

packages/cli/package.json

@@ -1,7 +1,7 @@
 {
   "$schema": "https://json.schemastore.org/package.json",
   "name": "@opencode/cli",
-  "version": "2.0.21",
+  "version": "2.0.22",
   "type": "module",
   "license": "MIT",
   "bin": {
@@ -39,6 +39,7 @@
     "@opentui/solid": "catalog:",
     "@parcel/watcher": "2.5.1",
     "@silvia-odwyer/photon-node": "0.3.4",
+    "diff": "catalog:",
     "effect": "catalog:",
     "immer": "11.1.4",
     "jsonc-parser": "3.3.1",

packages/cli/src/acp/agent.ts

@@ -9,12 +9,13 @@ import {
   type JsonRpcId,
   type Stream,
 } from "@agentclientprotocol/sdk"
-import type { OpenCodeClient } from "@opencode/client/promise"
+import type { OpenCodeClient } from "@opencode/client/effect"
 import { Cause, Deferred, Effect, Ref, type Scope } from "effect"
+import { ACPCapabilities } from "./capabilities"
 import { ACPCatalog } from "./catalog"
+import { ACPClient } from "./client"
 import { ACPConnection } from "./connection"
 import { ACPError } from "./error"
-import { ACPPromise } from "./promise"
 import { ACPService } from "./service"
 import { ACPSessions } from "./sessions"
 import { ACPTurn } from "./turn"
@@ -23,19 +24,20 @@ import { ACPTurn } from "./turn"
 export const connect = Effect.fnUntraced(function* (client: OpenCodeClient, stream: Stream) {
   const run = Effect.runPromiseWith(yield* Effect.context<Scope.Scope>())
   const catalog = yield* ACPCatalog.make(client)
-  // Requests can dispatch once the stream's read loop yields, which may be before the service below is built.
+  // Requests can dispatch before the service below is built.
   const ready = yield* Deferred.make<ACPService.Interface>()
   const handle =
     <Params, A>(
-      call: (service: ACPService.Interface, ctx: AgentHandlerContext<Params>) => Effect.Effect<A, ACPService.Failure>,
+      call: (service: ACPService.Interface, ctx: AgentHandlerContext<Params>) => Effect.Effect<A, ACPError.Failure>,
     ) =>
     (name: string) => {
       const handler = Effect.fn(name)(
         (ctx: AgentHandlerContext<Params>) =>
           Deferred.await(ready).pipe(Effect.flatMap((service) => call(service, ctx))),
         Effect.catchTags({
-          ACPCatalogLoadError: (error) => ACPPromise.classify(error.cause),
-          ACPCatalogNotReadyError: (error) => Effect.die(error),
+          ACPCatalogLoadError: (error) => ACPClient.classify(error.cause),
+          ACPCatalogNotReadyError: (error) =>
+            Effect.fail(new ACPError.ServiceFailureError({ safeMessage: error.message, errorName: "CatalogNotReady" })),
         }),
         Effect.mapError((error) => (error instanceof RequestError ? error : ACPError.toRequestError(error))),
         Effect.tapCauseIf(Cause.hasDies, (cause) => Effect.logError("ACP request failed", cause)),
@@ -102,8 +104,6 @@ export const connect = Effect.fnUntraced(function* (client: OpenCodeClient, stre
     "session/set_mode",
     handle((service, ctx) => service.setSessionMode(ctx.params)),
   )
-  // The SDK signal is passed through rather than interrupting the fiber: a cancelled turn still resolves with
-  // `stopReason: "cancelled"`.
   request(
     "session/prompt",
     handle((service, ctx) => service.prompt(ctx.params, ctx.signal)),
@@ -115,7 +115,7 @@ export const connect = Effect.fnUntraced(function* (client: OpenCodeClient, stre
   const acp = ACPConnection.make(app, stream)
   const connection = acp.connection
   const sessions = yield* ACPSessions.make({ client, connection, catalog })
-  const capabilities = yield* Ref.make({ childSessionUpdates: false, formElicitation: false })
+  const capabilities = yield* Ref.make(ACPCapabilities.parse(undefined))
   const turn = yield* ACPTurn.make({ client, connection, sessions, catalog, capabilities })
   yield* Deferred.succeed(ready, ACPService.make({ client, connection, catalog, sessions, capabilities, turn }))
   return acp.agent

packages/cli/src/acp/capabilities.ts

@@ -0,0 +1,17 @@
+import type { ClientCapabilities } from "@agentclientprotocol/sdk"
+
+export const ChildSessionUpdates = "opencode/child-session-updates"
+
+export type Capabilities = ReturnType<typeof parse>
+
+export function parse(client: ClientCapabilities | undefined) {
+  const elicitation = client?.elicitation
+  const compaction = client?.session?.compaction
+  return {
+    childSessionUpdates: client?._meta?.[ChildSessionUpdates] === true,
+    formElicitation: elicitation?.form !== undefined && elicitation.form !== null,
+    compaction: compaction !== undefined && compaction !== null,
+  }
+}
+
+export * as ACPCapabilities from "./capabilities"

packages/cli/src/acp/catalog.ts

@@ -1,24 +1,25 @@
-import type { CommandInfo, ModelInfo, ModelRef, OpenCodeClient, OpenCodeEvent } from "@opencode/client/promise"
+import type { OpenCodeClient, OpenCodeEvent } from "@opencode/client/effect"
+import type { Agent } from "@opencode/schema/agent"
+import type { Command } from "@opencode/schema/command"
+import type { Model } from "@opencode/schema/model"
 import { FSUtil } from "@opencode/util/fs-util"
-import { Context, Deferred, Effect, Exit, Schedule, Schema, Semaphore, Stream, SubscriptionRef } from "effect"
+import { Cause, Deferred, Effect, Exit, Schedule, Schema, Semaphore, Stream, SubscriptionRef } from "effect"
 import type { ConfigOptionProvider } from "./config-option"
 
-// ACP runs these itself; they take precedence over server commands with the same name.
 export const builtinCommands = new Map([
   ["compact", { description: "Compact the session", start: "compaction" as const }],
 ])
 
 export type Catalog = {
   readonly providers: ConfigOptionProvider[]
-  readonly models: ModelInfo[]
-  readonly defaultModel: ModelRef
-  readonly modes: Array<{ id: string; name: string; description?: string }>
-  readonly defaultModeID: string
-  /** Server commands, without those shadowed by a built-in. */
-  readonly commands: CommandInfo[]
+  readonly models: ReadonlyArray<Model.Info>
+  readonly defaultModel: Model.Ref
+  readonly modes: ReadonlyArray<{ id: Agent.ID; name: string; description?: string }>
+  readonly defaultModeID: Agent.ID
+  readonly commands: ReadonlyArray<Command.Info>
 }
 
-export class NotReadyError extends Schema.TaggedError<NotReadyError>()("ACPCatalogNotReadyError", {
+class NotReadyError extends Schema.TaggedError<NotReadyError>()("ACPCatalogNotReadyError", {
   reason: Schema.Literals(["models", "agents"]),
 }) {
   override get message() {
@@ -26,32 +27,26 @@ export class NotReadyError extends Schema.TaggedError<NotReadyError>()("ACPCatal
   }
 }
 
-export class LoadError extends Schema.TaggedError<LoadError>()("ACPCatalogLoadError", {
+class LoadError extends Schema.TaggedError<LoadError>()("ACPCatalogLoadError", {
   cause: Schema.Defect(),
 }) {}
 
 export type Error = NotReadyError | LoadError
 
 export interface Interface {
-  /** Loads a directory's catalog once. Concurrent callers share the load, and a failed load is not cached. */
   readonly get: (cwd: string) => Effect.Effect<Catalog, Error>
-  /** Resolves after a reload that started after the call. A failed reload keeps the previous catalog. */
   readonly reload: (cwd: string) => Effect.Effect<void, Error>
-  /** Emits the current catalog, then each reloaded one. */
   readonly changes: (cwd: string) => Stream.Stream<Catalog, Error>
 }
 
-export class Service extends Context.Service<Service, Interface>()("@opencode/cli/acp/Catalog") {}
-
 type Entry = {
   readonly cwd: string
   readonly catalog: SubscriptionRef.SubscriptionRef<Catalog>
   readonly lock: Semaphore.Semaphore
-  requested: number
-  loaded: number
+  requestedGeneration: number
+  loadedGeneration: number
 }
 
-// Provider, integration, and credential changes reach the catalog through model.updated.
 const reloadOn = new Set<OpenCodeEvent["type"]>(["model.updated", "agent.updated", "command.updated"])
 
 export const make = Effect.fnUntraced(function* (client: OpenCodeClient) {
@@ -59,21 +54,20 @@ export const make = Effect.fnUntraced(function* (client: OpenCodeClient) {
   const entries = new Map<string, Deferred.Deferred<Entry, Error>>()
   const connected = yield* Deferred.make<void>()
 
-  // A reload covers every request made before it starts, so requests queued behind a running reload share
-  // one more load. Typed load failures keep the previous catalog and still settle the requests they covered.
+  // Requests queued behind a running load share the next one.
   const reload = (entry: Entry) =>
     Effect.suspend(() => {
-      const target = ++entry.requested
+      const target = ++entry.requestedGeneration
       return entry.lock.withPermit(
         Effect.suspend(() => {
-          if (entry.loaded >= target) return Effect.void
-          const generation = entry.requested
+          if (entry.loadedGeneration >= target) return Effect.void
+          const generation = entry.requestedGeneration
           return load(client, entry.cwd).pipe(
             Effect.flatMap((next) => SubscriptionRef.set(entry.catalog, next)),
             Effect.ignore,
             Effect.andThen(
               Effect.sync(() => {
-                entry.loaded = generation
+                entry.loadedGeneration = generation
               }),
             ),
           )
@@ -82,7 +76,7 @@ export const make = Effect.fnUntraced(function* (client: OpenCodeClient) {
     })
 
   // Subscribe before the first read so an update between the read and the subscription is not lost.
-  yield* Stream.fromAsyncIterable(client.event.subscribe(), (cause) => cause).pipe(
+  yield* client.event.subscribe().pipe(
     Stream.runForEach((event) => {
       if (event.type === "server.connected") return Deferred.succeed(connected, undefined)
       if (!reloadOn.has(event.type)) return Effect.void
@@ -94,7 +88,9 @@ export const make = Effect.fnUntraced(function* (client: OpenCodeClient) {
         { discard: true },
       )
     }),
-    Effect.ignore,
+    Effect.catchCause((cause) =>
+      Cause.hasInterruptsOnly(cause) ? Effect.void : Effect.logWarning("ACP catalog event stream failed", cause),
+    ),
     Effect.ensuring(Deferred.succeed(connected, undefined)),
     Effect.forkScoped,
   )
@@ -105,8 +101,8 @@ export const make = Effect.fnUntraced(function* (client: OpenCodeClient) {
       cwd,
       catalog: yield* SubscriptionRef.make<Catalog>(yield* load(client, cwd)),
       lock: Semaphore.makeUnsafe(1),
-      requested: 0,
-      loaded: 0,
+      requestedGeneration: 0,
+      loadedGeneration: 0,
     } satisfies Entry
   })
 
@@ -127,8 +123,8 @@ export const make = Effect.fnUntraced(function* (client: OpenCodeClient) {
       )
     })
 
-  return Service.of({
-    get: Effect.fn("cli.acp.catalog.get")(function* (cwd) {
+  return {
+    get: Effect.fnUntraced(function* (cwd) {
       const loaded = yield* entry(cwd)
       return yield* SubscriptionRef.get(loaded.catalog)
     }),
@@ -136,12 +132,12 @@ export const make = Effect.fnUntraced(function* (client: OpenCodeClient) {
       yield* reload(yield* entry(cwd))
     }),
     changes: (cwd) => Stream.unwrap(entry(cwd).pipe(Effect.map((loaded) => SubscriptionRef.changes(loaded.catalog)))),
-  })
+  } satisfies Interface
 })
 
 const load = (client: OpenCodeClient, cwd: string) =>
   read(client, cwd).pipe(
-    // Some providers discover models in the background after plugin startup begins.
+    // Providers may still be discovering models after startup.
     Effect.retry({
       while: (error) => error._tag === "ACPCatalogNotReadyError",
       schedule: Schedule.spaced("25 millis").pipe(Schedule.upTo({ duration: "5 seconds" })),
@@ -151,19 +147,18 @@ const load = (client: OpenCodeClient, cwd: string) =>
 
 const read = Effect.fnUntraced(function* (client: OpenCodeClient, cwd: string) {
   const location = { directory: cwd }
-  const [modelResult, defaultResult, agentResult, commandResult] = yield* Effect.tryPromise({
-    try: (signal) =>
-      Promise.all([
-        client.model.list({ location }, { signal }),
-        client.model.default({ location }, { signal }),
-        client.agent.list({ location }, { signal }),
-        client.command.list({ location }, { signal }),
-      ]),
-    catch: (cause) => new LoadError({ cause }),
-  })
+  const [modelResult, defaultResult, agentResult, commandResult] = yield* Effect.all(
+    [
+      client.model.list({ location }),
+      client.model.default({ location }),
+      client.agent.list({ location }),
+      client.command.list({ location }),
+    ],
+    { concurrency: "unbounded" },
+  ).pipe(Effect.mapError((cause) => new LoadError({ cause })))
   const models = modelResult.data.filter((model) => model.enabled)
   const preferred = defaultResult.data
-  // Parallel reads can straddle initialization; select only from this model list.
+  // The parallel default read can name a model missing from this list.
   const defaultModel = preferred
     ? models.find((model) => model.providerID === preferred.providerID && model.id === preferred.id)
     : models[0]
@@ -186,7 +181,7 @@ const read = Effect.fnUntraced(function* (client: OpenCodeClient, cwd: string) {
   } satisfies Catalog
 })
 
-function providers(models: readonly ModelInfo[]): ConfigOptionProvider[] {
+function providers(models: ReadonlyArray<Model.Info>) {
   return Array.from(new Set(models.map((model) => model.providerID)))
     .toSorted()
     .map((providerID) => ({

packages/cli/src/acp/child.ts

@@ -0,0 +1,68 @@
+import type { SessionUpdate } from "@agentclientprotocol/sdk"
+
+export const UpdateMethod = "opencode/session/child_update"
+
+export type Session = {
+  readonly id: string
+  readonly parentID: string
+  readonly depth: number
+  readonly title?: string
+}
+
+export type Event =
+  | { readonly type: "update"; readonly update: SessionUpdate }
+  | {
+      readonly type: "status"
+      readonly status: "created" | "running" | "completed" | "failed" | "interrupted"
+      readonly error?: { readonly type: string; readonly message: string }
+    }
+
+export type Update = {
+  readonly rootSessionId: string
+  readonly childSessionId: string
+  readonly parentSessionId: string
+  readonly depth: number
+  readonly title?: string
+} & Event
+
+export function update(rootSessionID: string, child: Session, event: Event): Update {
+  return {
+    rootSessionId: rootSessionID,
+    childSessionId: child.id,
+    parentSessionId: child.parentID,
+    depth: child.depth,
+    ...(child.title ? { title: child.title } : {}),
+    ...event,
+  }
+}
+
+export function project(sessionUpdate: SessionUpdate, child: Session) {
+  const projected = { ...sessionUpdate }
+  projected._meta = { ...projected._meta, ...meta(child) }
+  if (projected.sessionUpdate === "tool_call" || projected.sessionUpdate === "tool_call_update") {
+    projected.toolCallId = toolCallID(child, projected.toolCallId)
+    if (projected.title) projected.title = prefixTitle(child, projected.title)
+  }
+  return projected
+}
+
+export function meta(child: Session) {
+  return {
+    "opencode/child-session": {
+      id: child.id,
+      parentID: child.parentID,
+      depth: child.depth,
+      ...(child.title ? { title: child.title } : {}),
+    },
+  }
+}
+
+export function toolCallID(child: Session | undefined, id: string) {
+  return child ? `${child.id}:${id}` : id
+}
+
+export function prefixTitle(child: Session | undefined, value: string) {
+  return child?.title ? `${child.title}: ${value}` : value
+}
+
+export * as ACPChild from "./child"

packages/cli/src/acp/client.ts

@@ -0,0 +1,32 @@
+import { ClientError } from "@opencode/client/effect"
+import { InvalidCursorError, InvalidRequestError, SessionNotFoundError } from "@opencode/protocol/errors"
+import { Session } from "@opencode/schema/session"
+import { Effect, Schema } from "effect"
+import { HttpClientError } from "effect/unstable/http"
+import { ACPError } from "./error"
+
+export function classify(error: unknown): Effect.Effect<never, ACPError.Error> {
+  if (
+    error instanceof ClientError &&
+    HttpClientError.isHttpClientError(error.cause) &&
+    // The client reports a failed body read as a `DecodeError` with a cause; its other `DecodeError`s have none.
+    (error.cause.reason._tag === "TransportError" ||
+      (error.cause.reason._tag === "DecodeError" && error.cause.reason.cause !== undefined))
+  )
+    return Effect.fail(new ACPError.ServerUnavailableError())
+  if (error instanceof SessionNotFoundError)
+    return Effect.fail(new ACPError.SessionNotFoundError({ sessionId: error.sessionID }))
+  if (error instanceof InvalidRequestError)
+    return Effect.fail(new ACPError.InvalidRequestError({ message: error.message, field: error.field }))
+  if (error instanceof InvalidCursorError)
+    return Effect.fail(new ACPError.InvalidRequestError({ message: error.message, field: "cursor" }))
+  return Effect.die(error)
+}
+
+export function decodeSessionID(value: string) {
+  return Schema.decodeUnknownEffect(Session.ID)(value).pipe(
+    Effect.mapError(() => new ACPError.InvalidRequestError({ message: "Invalid session ID", field: "sessionID" })),
+  )
+}
+
+export * as ACPClient from "./client"

packages/cli/src/acp/compaction.ts

@@ -0,0 +1,144 @@
+import type { SessionUpdate } from "@agentclientprotocol/sdk"
+import type { OpenCodeEvent } from "@opencode/client/effect"
+import type { SessionError } from "@opencode/schema/session-error"
+import { SessionMessage } from "@opencode/schema/session-message"
+
+const MarkerMeta = "opencode/compaction"
+
+type Started = { readonly status: "started"; readonly messageId: string; readonly reason: "auto" | "manual" }
+
+type Compaction =
+  | Started
+  | {
+      readonly status: "completed"
+      readonly messageId: string
+      readonly reason: "auto" | "manual"
+      readonly summary: string
+    }
+  | {
+      readonly status: "failed"
+      readonly messageId: string
+      readonly reason: "auto" | "manual"
+      readonly error: SessionError.Error
+    }
+
+export type Tracked = ReadonlyMap<string, Started>
+
+type LifecycleEvent = Extract<
+  OpenCodeEvent,
+  { readonly type: "session.compaction.started" | "session.compaction.ended" | "session.compaction.failed" }
+>
+type OpeningEvent = Extract<
+  LifecycleEvent,
+  { readonly type: "session.compaction.started" | "session.compaction.failed" }
+>
+
+const Cancelled = new Set(["aborted", "compaction.interrupted"])
+
+// Without child updates, a child's standard update would read as the parent's own.
+export function usesStandardUpdates(
+  ctx: { readonly compaction: boolean; readonly childUpdates: boolean },
+  child: boolean,
+) {
+  return ctx.compaction && (!child || ctx.childUpdates)
+}
+
+export function apply(event: LifecycleEvent, tracked: Tracked, standardUpdates: boolean) {
+  const sessionID = event.data.sessionID
+  if (event.type === "session.compaction.started") {
+    const started = open(event)
+    return { tracked: new Map(tracked).set(sessionID, started), updates: [update(started, standardUpdates)] }
+  }
+  const current = tracked.get(sessionID)
+  const remaining = new Map(tracked)
+  remaining.delete(sessionID)
+  if (event.type === "session.compaction.ended") {
+    if (!current) return { tracked: remaining, updates: [] }
+    const completed: Compaction = {
+      ...current,
+      status: "completed",
+      reason: event.data.reason,
+      summary: event.data.text,
+    }
+    return { tracked: remaining, updates: [update(completed, standardUpdates)] }
+  }
+  // Auto compaction can fail without a started event; open it first for standard clients.
+  const started = current ?? open(event)
+  const failed: Compaction = { ...started, status: "failed", reason: event.data.reason, error: event.data.error }
+  return {
+    tracked: remaining,
+    updates: [
+      ...(current || !standardUpdates ? [] : [update(started, standardUpdates)]),
+      update(failed, standardUpdates),
+    ],
+  }
+}
+
+export function chunk(started: Started | undefined, text: string, standardUpdates: boolean): SessionUpdate | undefined {
+  if (!started || !standardUpdates) return undefined
+  return { sessionUpdate: "compaction_summary_chunk", compactionId: started.messageId, content: { type: "text", text } }
+}
+
+export function abandon(started: Started, standardUpdates: boolean) {
+  return update(
+    { ...started, status: "failed", error: { type: "aborted", message: "Compaction cancelled" } },
+    standardUpdates,
+  )
+}
+
+// Nothing on this connection would settle a replayed running compaction.
+export function replay(message: Extract<SessionMessage.Info, { type: "compaction" }>, standardUpdates: boolean) {
+  if (message.status === "running") return undefined
+  const base = { messageId: message.id, reason: message.reason }
+  return update(
+    message.status === "failed"
+      ? { ...base, status: "failed", error: message.error }
+      : { ...base, status: "completed", summary: message.summary },
+    standardUpdates,
+  )
+}
+
+// Matches core's compaction message ID, so live and replayed compactions line up.
+function open(event: OpeningEvent): Started {
+  return {
+    status: "started",
+    messageId: event.data.inputID ?? SessionMessage.ID.fromEvent(event.id),
+    reason: event.data.reason,
+  }
+}
+
+function update(compaction: Compaction, standardUpdates: boolean): SessionUpdate {
+  if (!standardUpdates) {
+    const marker = {
+      status: compaction.status,
+      messageId: compaction.messageId,
+      reason: compaction.reason,
+      ...(compaction.status === "failed" ? { error: compaction.error } : {}),
+    }
+    return { sessionUpdate: "session_info_update", _meta: { [MarkerMeta]: marker } }
+  }
+  const compactionId = compaction.messageId
+  if (compaction.status === "started")
+    return { sessionUpdate: "compaction_update", compactionId, status: "in_progress" }
+  if (compaction.status === "completed") {
+    const summary = compaction.summary ? [{ type: "text" as const, text: compaction.summary }] : null
+    return { sessionUpdate: "compaction_update", compactionId, status: "completed", summary }
+  }
+  if (Cancelled.has(compaction.error.type))
+    return { sessionUpdate: "compaction_update", compactionId, status: "cancelled", summary: null }
+  return {
+    sessionUpdate: "compaction_update",
+    compactionId,
+    status: "failed",
+    summary: null,
+    error: displayError(compaction.error),
+  }
+}
+
+// Core reports a defect as `compaction.failed` with a multi-line pretty-printed cause.
+function displayError(error: SessionError.Error) {
+  if (!error.message || (error.type === "compaction.failed" && error.message.includes("\n"))) return "Compaction failed"
+  return error.message
+}
+
+export * as ACPCompaction from "./compaction"

packages/cli/src/acp/config-option.ts

@@ -1,10 +1,11 @@
 import type { SessionConfigOption } from "@agentclientprotocol/sdk"
-import type { ModelRef } from "@opencode/client/promise"
+import type { Agent } from "@opencode/schema/agent"
+import type { Model } from "@opencode/schema/model"
 import { builtinCommands, type Catalog } from "./catalog"
 
 export const DEFAULT_VARIANT_VALUE = "default"
 
-export type ConfigOptionModel = {
+type ConfigOptionModel = {
   id: string
   name: string
   variants?: ReadonlyArray<string>
@@ -16,7 +17,7 @@ export type ConfigOptionProvider = {
   models: ReadonlyArray<ConfigOptionModel>
 }
 
-export type ConfigOptionMode = {
+type ConfigOptionMode = {
   id: string
   name: string
   description?: string
@@ -27,10 +28,9 @@ export type ModelSelection = {
   variant?: string
 }
 
-/** A session's model and mode. Unset fields follow the catalog defaults. */
 export type Selection = {
-  readonly model?: ModelRef
-  readonly modeID?: string
+  readonly model?: Model.Ref
+  readonly modeID?: Agent.ID
 }
 
 export function currentModel(catalog: Catalog, selection: Selection) {
@@ -163,5 +163,3 @@ function selectVariant(variant: string | undefined, variants: readonly string[])
   if (variants.includes(DEFAULT_VARIANT_VALUE)) return DEFAULT_VARIANT_VALUE
   return variants[0] ?? DEFAULT_VARIANT_VALUE
 }
-
-export * as ACPConfigOption from "./config-option"

packages/cli/src/acp/connection.ts

@@ -5,46 +5,31 @@ import {
   type CreateElicitationRequest,
   type CreateElicitationResponse,
   type JsonRpcId,
-  type RequestError,
+  RequestError,
   type RequestPermissionRequest,
   type RequestPermissionResponse,
   type SessionNotification,
   type Stream,
 } from "@agentclientprotocol/sdk"
 import { Context, Deferred, Effect } from "effect"
-import type { ACPError } from "./error"
-import { ACPPromise } from "./promise"
 
-/**
- * Completes once the response to the request being handled is written, so messages sent afterwards follow it.
- * Interrupts when the request fails. Outside a request it completes immediately.
- */
 export const Responded = Context.Reference<Effect.Effect<void>>("@opencode/cli/acp/Connection/Responded", {
   defaultValue: () => Effect.void,
 })
 
 export interface Interface {
-  readonly sessionUpdate: (params: SessionNotification) => Effect.Effect<void, ACPError.Error | RequestError>
-  /** Interruption cancels the client's request. */
+  readonly sessionUpdate: (params: SessionNotification) => Effect.Effect<void, RequestError>
   readonly requestPermission: (
     params: RequestPermissionRequest,
-  ) => Effect.Effect<RequestPermissionResponse, ACPError.Error | RequestError>
-  readonly extNotification: (
-    method: string,
-    params: Record<string, unknown>,
-  ) => Effect.Effect<void, ACPError.Error | RequestError>
-  /** Interruption cancels the client's request. */
+  ) => Effect.Effect<RequestPermissionResponse, RequestError>
+  readonly extNotification: (method: string, params: Record<string, unknown>) => Effect.Effect<void, RequestError>
   readonly createElicitation: (
     params: CreateElicitationRequest,
-  ) => Effect.Effect<CreateElicitationResponse, ACPError.Error | RequestError>
-  /** Tracks an incoming request from now on and returns its `Responded`. */
+  ) => Effect.Effect<CreateElicitationResponse, RequestError>
   readonly responded: (requestId: JsonRpcId) => Effect.Effect<void>
 }
 
-export class Service extends Context.Service<Service, Interface>()("@opencode/cli/acp/Connection") {}
-
 export function make(app: AgentApp, stream: Stream) {
-  // Settled as each response is written to the stream, which serializes every outgoing message.
   const responses = new Map<JsonRpcId, Deferred.Deferred<void>>()
   const writer = stream.writable.getWriter()
   const agent = app.connect({
@@ -64,15 +49,15 @@ export function make(app: AgentApp, stream: Stream) {
   })
   return {
     agent,
-    connection: Service.of({
-      sessionUpdate: (params) => ACPPromise.promise(() => agent.client.notify(methods.client.session.update, params)),
+    connection: {
+      sessionUpdate: (params) => promise(() => agent.client.notify(methods.client.session.update, params)),
       requestPermission: (params) =>
-        ACPPromise.promise((signal) =>
+        promise((signal) =>
           agent.client.request(methods.client.session.requestPermission, params, { cancellationSignal: signal }),
         ),
-      extNotification: (method, params) => ACPPromise.promise(() => agent.client.notify(method, params)),
+      extNotification: (method, params) => promise(() => agent.client.notify(method, params)),
       createElicitation: (params) =>
-        ACPPromise.promise((signal) =>
+        promise((signal) =>
           agent.client.request(methods.client.elicitation.create, params, { cancellationSignal: signal }),
         ),
       responded: (requestId) => {
@@ -80,8 +65,14 @@ export function make(app: AgentApp, stream: Stream) {
         responses.set(requestId, responded)
         return Deferred.await(responded)
       },
-    }),
+    } satisfies Interface,
   }
 }
 
+function promise<A>(evaluate: (signal: AbortSignal) => Promise<A>) {
+  return Effect.tryPromise({ try: evaluate, catch: (cause) => cause }).pipe(
+    Effect.catch((cause) => (cause instanceof RequestError ? Effect.fail(cause) : Effect.die(cause))),
+  )
+}
+
 export * as ACPConnection from "./connection"

packages/cli/src/acp/content.ts

@@ -1,18 +1,19 @@
 import type { ContentBlock, ContentChunk, ResourceLink } from "@agentclientprotocol/sdk"
 import path from "node:path"
 import { fileURLToPath, pathToFileURL } from "node:url"
+import { Result } from "effect"
 
 export type PromptPart =
   | { readonly type: "text"; readonly text: string; readonly synthetic?: boolean; readonly ignored?: boolean }
   | { readonly type: "file"; readonly url: string; readonly filename?: string; readonly mime: string }
 
-export type ReplayPart = PromptPart | { readonly type: "reasoning"; readonly text: string }
+type ReplayPart = PromptPart | { readonly type: "reasoning"; readonly text: string }
 
 export function promptContentToParts(content: readonly ContentBlock[]): PromptPart[] {
   return content.flatMap(contentBlockToParts)
 }
 
-export function contentBlockToParts(block: ContentBlock): PromptPart[] {
+function contentBlockToParts(block: ContentBlock): PromptPart[] {
   switch (block.type) {
     case "text": {
       const audience = block.annotations?.audience
@@ -24,48 +25,30 @@ export function contentBlockToParts(block: ContentBlock): PromptPart[] {
       }
       return [{ type: "text", text: block.text }]
     }
-    case "image":
-      if (block.data) {
-        return [
-          {
-            type: "file",
-            url: `data:${block.mimeType};base64,${block.data}`,
-            filename: filenameFromUri(block.uri ?? undefined) ?? "image",
-            mime: block.mimeType,
-          },
-        ]
-      }
-      if (block.uri?.startsWith("data:") || block.uri?.startsWith("http://") || block.uri?.startsWith("https://")) {
-        return [
-          {
-            type: "file",
-            url: block.uri,
-            filename: filenameFromUri(block.uri) ?? "image",
-            mime: block.mimeType,
-          },
-        ]
-      }
-      return []
+    case "image": {
+      const url = block.data ? `data:${block.mimeType};base64,${block.data}` : block.uri
+      if (!url) return []
+      const filename = filenameFromUri(block.uri ?? undefined) ?? "image"
+      if (url.startsWith("data:")) return [{ type: "file", url, filename, mime: block.mimeType }]
+      return [resourceLinkToPart({ uri: url, name: filename, mimeType: block.mimeType })]
+    }
     case "resource_link":
       return [resourceLinkToPart(block)]
     case "resource":
       if ("text" in block.resource) {
-        try {
-          const parsed = new URL(block.resource.uri)
-          if (parsed.protocol === "file:") {
-            const line = parsed.hash.match(/^#L(\d+)/)?.[1]
-            const decoded = (() => {
-              try {
-                return fileURLToPath(parsed)
-              } catch {
-                return decodeURIComponent(parsed.pathname)
-              }
-            })()
-            const filepath = path.sep === "\\" ? decoded.replace(/\\/g, "/") : decoded
-            return [{ type: "text", text: `[${filepath}${line ? `:${line}` : ""}]\n${block.resource.text}` }]
-          }
-        } catch {}
-        return [{ type: "text", text: `[${block.resource.uri}]\n${block.resource.text}` }]
+        const parsed = URL.canParse(block.resource.uri) ? new URL(block.resource.uri) : undefined
+        const decoded =
+          parsed?.protocol === "file:"
+            ? Result.try(() => fileURLToPath(parsed)).pipe(
+                Result.orElse(() => Result.try(() => decodeURIComponent(parsed.pathname))),
+                Result.getOrUndefined,
+              )
+            : undefined
+        if (!parsed || decoded === undefined)
+          return [{ type: "text", text: `[${block.resource.uri}]\n${block.resource.text}` }]
+        const line = parsed.hash.match(/^#L(\d+)/)?.[1]
+        const filepath = path.sep === "\\" ? decoded.replace(/\\/g, "/") : decoded
+        return [{ type: "text", text: `[${filepath}${line ? `:${line}` : ""}]\n${block.resource.text}` }]
       }
       if (!block.resource.mimeType) return []
       return [
@@ -180,8 +163,9 @@ export function linkReference(name: string | undefined, uri: string): PromptPart
 
 function filenameFromUri(uri: string | undefined): string | undefined {
   if (!uri || uri.startsWith("data:")) return undefined
-  if (URL.canParse(uri)) return path.basename(new URL(uri).pathname) || undefined
+  if (URL.canParse(uri)) {
+    const url = new URL(uri)
+    return path.basename((url.protocol === "zed:" && url.searchParams.get("path")) || url.pathname) || undefined
+  }
   return path.basename(uri) || undefined
 }
-
-export * as ACPContent from "./content"

packages/cli/src/acp/directories.ts

@@ -1,20 +1,17 @@
 import { isAbsolute, join, resolve } from "node:path"
 import { isDeepStrictEqual } from "node:util"
-import type { OpenCodeClient, PermissionRule, SessionInfo, SessionMetadata } from "@opencode/client/promise"
+import type { OpenCodeClient } from "@opencode/client/effect"
+import type { Permission } from "@opencode/schema/permission"
+import type { Session } from "@opencode/schema/session"
 import { FSUtil } from "@opencode/util/fs-util"
 import { Effect, Option, Schema } from "effect"
+import { ACPClient } from "./client"
 import { ACPError } from "./error"
-import { ACPPromise } from "./promise"
 
 const key = "opencode.acp.additionalDirectories"
 const decodeStored = Schema.decodeUnknownOption(Schema.Array(Schema.String))
 
-/**
- * Normalizes additional workspace roots without following symlinks, keeping the spelling tools will see, and
- * drops duplicates and roots that resolve to cwd. Glob characters are rejected because permission resources
- * would treat them as wildcards. The ACP SDK has already dropped entries that are not strings and replaced a
- * value that is not an array with `[]`.
- */
+// Permission resources treat `*` and `?` as wildcards.
 export const parse = Effect.fnUntraced(function* (cwd: string, directories: readonly string[] = []) {
   const invalid = directories.find((directory) => !isAbsolute(directory) || /[*?]/.test(directory))
   if (invalid !== undefined) return yield* new ACPError.InvalidAdditionalDirectoryError({ directory: invalid })
@@ -24,27 +21,18 @@ export const parse = Effect.fnUntraced(function* (cwd: string, directories: read
   )
 })
 
-/** Session create fields that grant these directories. */
 export function grant(directories: readonly string[]) {
   if (directories.length === 0) return {}
   return { permissions: rules(directories), metadata: { [key]: [...directories] } }
 }
 
-/** The additional directories ACP last activated for the session, in request order. */
-export function list(session: Pick<SessionInfo, "metadata">) {
+export function list(session: Pick<Session.Info, "metadata">) {
   return [...Option.getOrElse(decodeStored(session.metadata?.[key]), () => [])]
 }
 
-/**
- * Replaces the rules granted for the previously activated directories with grants for these directories.
- * Grants persist on the server session, so they also apply when it is used from other clients, and child
- * sessions copy them when they are created; a child created earlier keeps roots its parent later dropped.
- * Session rules are evaluated after agent and config rules, so a grant overrides config `external_directory`
- * rules inside the root, while read, edit, and shell rules still apply.
- */
 export const activate = Effect.fnUntraced(function* (
   client: OpenCodeClient,
-  session: SessionInfo,
+  session: Session.Info,
   directories: readonly string[],
 ) {
   const previous = list(session)
@@ -55,24 +43,24 @@ export const activate = Effect.fnUntraced(function* (
     ...rules(directories),
     ...current.filter((rule) => !owned.some((item) => isDeepStrictEqual(item, rule))),
   ]
-  const metadata: SessionMetadata = {
+  const metadata: Session.Metadata = {
     ...Object.fromEntries(Object.entries(session.metadata ?? {}).filter(([name]) => name !== key)),
     ...(directories.length > 0 ? { [key]: [...directories] } : {}),
   }
   const permissionsChanged = !isDeepStrictEqual(permissions, current)
   const metadataChanged = !isDeepStrictEqual(previous, directories)
   if (!permissionsChanged && !metadataChanged) return
-  yield* ACPPromise.promise(() =>
-    client.session.update({
+  yield* client.session
+    .update({
       sessionID: session.id,
       ...(permissionsChanged ? { permissions } : {}),
       ...(metadataChanged ? { metadata } : {}),
-    }),
-  )
+    })
+    .pipe(Effect.catch(ACPClient.classify))
 })
 
 // Tools compare the written path without following symlinks, so both spellings of a root are granted.
-function rules(directories: readonly string[]): PermissionRule[] {
+function rules(directories: readonly string[]): Permission.Rule[] {
   return [...new Set(directories.flatMap((directory) => [directory, FSUtil.resolve(directory)]))].map((directory) => ({
     action: "external_directory",
     resource: join(directory, "*"),

packages/cli/src/acp/elicitation.ts

@@ -4,42 +4,37 @@ import type {
   ElicitationSchema,
   EnumOption,
 } from "@agentclientprotocol/sdk"
-import { isFormAlreadySettledError, isFormNotFoundError, type OpenCodeClient } from "@opencode/client/promise"
+import type { OpenCodeClient } from "@opencode/client/effect"
 import { Form } from "@opencode/schema/form"
 import { Cause, Effect, Option, Schema } from "effect"
+import type { Capabilities } from "./capabilities"
+import { ACPChild } from "./child"
+import { ACPClient } from "./client"
 import type { ACPConnection } from "./connection"
-import type { ACPService } from "./service"
 
-/** A form as the event stream carries it, with an unbranded ID. */
 export type AskedForm = Omit<Form.Info, "id"> & { readonly id: string }
 type InputField = Exclude<Form.Field, Form.ExternalField>
 type SelectField = Form.StringField | Form.MultiselectField
 
-// Form mode must not collect secrets, so only forms from flows known not to ask for credentials are elicited.
-const ElicitedKind = Schema.Struct({ kind: Schema.Literals(["question", "websearch.provider"]) })
-const Credential = /password|passphrase|secret|token|api[_-]?key|credential|private[_-]?key/i
+const QuestionKind = "question"
+// Form mode must not collect secrets; elicit only flows known to be credential-free.
+const ElicitedKind = Schema.Struct({ kind: Schema.Literals([QuestionKind, "websearch.provider"]) })
+const Credential = /password|passphrase|secret|token|api[_ -]?key|credential|private[_ -]?key/i
 const ToolSource = Schema.Struct({ tool: Schema.Struct({ id: Schema.String }) })
 
 type Input = {
   readonly client: OpenCodeClient
   readonly connection: ACPConnection.Interface
-  readonly form: AskedForm
+  readonly form: Form.Info
   readonly requestedSchema: ElicitationSchema
   readonly clientSessionID: string
-  readonly child?: { readonly id: string; readonly title?: string }
-  /** Whether the asking tool call reached the client as a `session/update` tool call. */
+  readonly child?: ACPChild.Session
   readonly toolCallSent: boolean
-  /** Completes once the form is answered or cancelled elsewhere. */
   readonly settled: Effect.Effect<void>
 }
 
 type Outcome = Form.Answer | "cancel" | "settled"
 
-/**
- * Asks the client, then resolves the form on the server. Once `cancelled` completes, the client's request is
- * cancelled or never sent, and the form is cancelled. Once `settled` completes, the client's request is cancelled and
- * the server is left alone. Resolving on the server is uninterruptible.
- */
 export const reply = Effect.fn("cli.acp.elicitation.reply")(function* (input: Input, cancelled: Effect.Effect<void>) {
   yield* Effect.uninterruptibleMask((restore) =>
     // The race starts racers in order and stops once one is done, so an earlier cancel never starts the ask.
@@ -57,26 +52,25 @@ export const reply = Effect.fn("cli.acp.elicitation.reply")(function* (input: In
   )
 })
 
-/** Cancels a form, interrupting its session when the server can't cancel it. */
-export function cancel(client: OpenCodeClient, form: AskedForm) {
-  return settle(() => client.session.form.cancel({ sessionID: form.sessionID, formID: form.id })).pipe(
+export const UnshownQuestionMessage =
+  "The question couldn't be shown to the user in this client. Continue without an answer: make reasonable assumptions and state them, or ask the user in your reply if you can't proceed."
+
+function cancel(client: OpenCodeClient, form: Form.Info, message?: string) {
+  return client.session.form.cancel({ sessionID: form.sessionID, formID: form.id, message }).pipe(
+    Effect.catchTag(["FormAlreadySettledError", "FormNotFoundError"], () => Effect.void),
     Effect.catch(() =>
-      Effect.tryPromise(() => client.session.interrupt({ sessionID: form.sessionID })).pipe(Effect.ignore),
+      ACPClient.decodeSessionID(form.sessionID).pipe(
+        Effect.flatMap((sessionID) => client.session.interrupt({ sessionID })),
+        Effect.ignore,
+      ),
     ),
   )
 }
 
-/**
- * The form-mode schema for a form, or undefined when the form is cancelled instead: the client lacks form
- * elicitation, the form is not from an allowed flow or has a field that looks like a credential, or ACP can't
- * represent it faithfully. Unrepresentable forms have `external` fields, `when` conditions, a hidden required field
- * without a default, a default outside a field's options, or a free-text answer alongside options that must also
- * satisfy `required` or item bounds across both inputs. Hidden fields are not asked and answer with their default.
- */
-export function requestedSchema(form: AskedForm, capabilities: ACPService.Capabilities): ElicitationSchema | undefined {
+export function requestedSchema(form: AskedForm, capabilities: Capabilities): ElicitationSchema | undefined {
   if (!capabilities.formElicitation) return undefined
   if (Option.isNone(Schema.decodeUnknownOption(ElicitedKind)(form.metadata))) return undefined
-  if (form.fields.some((field) => Credential.test(field.key) || Credential.test(field.title ?? ""))) return undefined
+  if (form.fields.some(credentialLike)) return undefined
   const fields = form.fields.filter((field): field is InputField => field.type !== "external")
   if (fields.length !== form.fields.length || fields.some((field) => field.when?.length)) return undefined
   if (fields.some((field) => field.hidden && field.required && field.default === undefined)) return undefined
@@ -90,8 +84,14 @@ export function requestedSchema(form: AskedForm, capabilities: ACPService.Capabi
   }
 }
 
-/** The answer for an accepted response, or undefined when the user declined, cancelled, or sent invalid content. */
-export function answer(form: AskedForm, response: CreateElicitationResponse): Form.Answer | undefined {
+// The question tool returns the message to the model, so the turn continues instead of ending as interrupted.
+export function cancelUnshown(client: OpenCodeClient, form: Form.Info) {
+  return cancel(client, form, form.metadata?.kind === QuestionKind ? UnshownQuestionMessage : undefined).pipe(
+    Effect.uninterruptible,
+  )
+}
+
+function answer(form: AskedForm, response: CreateElicitationResponse): Form.Answer | undefined {
   if (response.action !== "accept") return undefined
   const content = Schema.decodeUnknownOption(Form.Answer)(response.content ?? {})
   if (Option.isNone(content)) return undefined
@@ -109,8 +109,8 @@ const ask = Effect.fnUntraced(function* (input: Input) {
   const response = yield* input.connection.createElicitation({
     mode: "form",
     sessionId: input.clientSessionID,
-    ...(toolCallID ? { toolCallId: input.child ? `${input.child.id}:${toolCallID}` : toolCallID } : {}),
-    message: input.child?.title ? `${input.child.title}: ${input.form.title}` : input.form.title,
+    ...(toolCallID ? { toolCallId: ACPChild.toolCallID(input.child, toolCallID) } : {}),
+    message: ACPChild.prefixTitle(input.child, input.form.title),
     requestedSchema: input.requestedSchema,
   })
   return answer(input.form, response) ?? "cancel"
@@ -119,21 +119,21 @@ const ask = Effect.fnUntraced(function* (input: Input) {
 function respond(input: Input, outcome: Outcome) {
   if (outcome === "settled") return Effect.void
   if (outcome === "cancel") return cancel(input.client, input.form)
-  return settle(() =>
-    input.client.session.form.reply({ sessionID: input.form.sessionID, formID: input.form.id, answer: outcome }),
-  ).pipe(
-    Effect.catch((cause) =>
-      Effect.logWarning("ACP form reply failed", cause).pipe(Effect.andThen(cancel(input.client, input.form))),
-    ),
-  )
+  return input.client.session.form
+    .reply({ sessionID: input.form.sessionID, formID: input.form.id, answer: outcome })
+    .pipe(
+      Effect.catchTag(["FormAlreadySettledError", "FormNotFoundError"], () => Effect.void),
+      Effect.catch((cause) =>
+        Effect.logWarning("ACP form reply failed", cause).pipe(Effect.andThen(cancel(input.client, input.form))),
+      ),
+    )
 }
 
-// A form already answered or cancelled elsewhere needs nothing more.
-function settle(evaluate: () => Promise<void>) {
-  return Effect.tryPromise({ try: evaluate, catch: (cause) => cause }).pipe(
-    Effect.catch((cause) =>
-      isFormAlreadySettledError(cause) || isFormNotFoundError(cause) ? Effect.void : Effect.fail(cause),
-    ),
+function credentialLike(field: Form.Field) {
+  const labels =
+    field.type === "string" || field.type === "multiselect" ? (field.options ?? []).map((option) => option.label) : []
+  return [field.key, field.title, field.description, ...labels].some(
+    (text) => text !== undefined && Credential.test(text),
   )
 }
 
@@ -153,7 +153,8 @@ function properties(field: InputField): Array<[string, ElicitationPropertySchema
   const base = { title: field.title, description: field.description }
   switch (field.type) {
     case "string": {
-      if (!hasOptions(field)) return [[field.key, { type: "string", ...base, ...text(field), default: field.default }]]
+      if (!hasOptions(field))
+        return [[field.key, { type: "string", ...base, ...stringConstraints(field), default: field.default }]]
       const select: ElicitationPropertySchema = {
         type: "string",
         ...base,
@@ -186,7 +187,6 @@ function properties(field: InputField): Array<[string, ElicitationPropertySchema
   }
 }
 
-// A free-text answer next to a field's options is a separate optional property that wins over the selection.
 function other(field: SelectField, description: string): [string, ElicitationPropertySchema] {
   return [
     customKey(field),
@@ -194,13 +194,13 @@ function other(field: SelectField, description: string): [string, ElicitationPro
       type: "string",
       title: `${field.title ?? field.key} (other)`,
       description,
-      ...(field.type === "string" ? text(field) : {}),
+      ...(field.type === "string" ? stringConstraints(field) : {}),
     },
   ]
 }
 
-// Core rejects an empty string for a required field, so the client is told it needs at least one character.
-function text(field: Form.StringField) {
+// Core rejects an empty string for a required field.
+function stringConstraints(field: Form.StringField) {
   return {
     format: field.format,
     minLength: field.required ? Math.max(field.minLength ?? 0, 1) : field.minLength,

packages/cli/src/acp/error.ts

@@ -1,5 +1,6 @@
 import { RequestError } from "@agentclientprotocol/sdk"
 import { Schema } from "effect"
+import type { ACPCatalog } from "./catalog"
 
 export class SessionNotFoundError extends Schema.TaggedError<SessionNotFoundError>()("ACPSessionNotFoundError", {
   sessionId: Schema.String,
@@ -55,24 +56,21 @@ export class ServerUnavailableError extends Schema.TaggedError<ServerUnavailable
   {},
 ) {}
 
-const Errors = Schema.Union([
-  SessionNotFoundError,
-  SessionDirectoryMismatchError,
-  InvalidConfigOptionError,
-  InvalidModelError,
-  InvalidEffortError,
-  InvalidModeError,
-  InvalidAdditionalDirectoryError,
-  AuthRequiredError,
-  UnknownAuthMethodError,
-  InvalidRequestError,
-  ServiceFailureError,
-  ServerUnavailableError,
-])
+export type Error =
+  | SessionNotFoundError
+  | SessionDirectoryMismatchError
+  | InvalidConfigOptionError
+  | InvalidModelError
+  | InvalidEffortError
+  | InvalidModeError
+  | InvalidAdditionalDirectoryError
+  | AuthRequiredError
+  | UnknownAuthMethodError
+  | InvalidRequestError
+  | ServiceFailureError
+  | ServerUnavailableError
 
-export type Error = typeof Errors.Type
-
-export const is = Schema.is(Errors)
+export type Failure = Error | RequestError | ACPCatalog.Error
 
 export function toRequestError(error: Error): RequestError {
   switch (error._tag) {
@@ -120,9 +118,9 @@ export function toRequestError(error: Error): RequestError {
   return exhaustive
 }
 
-export function fromUnknown(error: unknown, service?: string) {
+export function fromUnknown(error: unknown) {
   const errorName = error instanceof Error ? error.name : undefined
-  return new ServiceFailureError({ safeMessage: "Internal service failure", service, errorName })
+  return new ServiceFailureError({ safeMessage: "Internal service failure", errorName })
 }
 
 export * as ACPError from "./error"

packages/cli/src/acp/permission.ts

@@ -1,24 +1,30 @@
-import type { PermissionOption, ToolCallContent, ToolCallLocation } from "@agentclientprotocol/sdk"
-import type { EventSubscribeOutput, OpenCodeClient, PermissionReplyInput } from "@opencode/client/promise"
+import type { PermissionOption } from "@agentclientprotocol/sdk"
+import type { OpenCodeClient, OpenCodeEvent } from "@opencode/client/effect"
+import { FileDiff } from "@opencode/schema/file-diff"
+import type { Permission } from "@opencode/schema/permission"
+import type { Session } from "@opencode/schema/session"
 import { Patch } from "@opencode/util/patch"
-import { Cause, Effect } from "effect"
+import { applyPatch } from "diff"
+import { Cause, Effect, Option, Schema } from "effect"
+import { ACPChild } from "./child"
+import { ACPClient } from "./client"
 import type { ACPConnection } from "./connection"
-import { ACPPromise } from "./promise"
 import { absolutePath, filePath, patchHunks, pendingToolCall, stringValue, toLocations, type ToolInput } from "./tool"
 
-type PermissionEvent = Extract<EventSubscribeOutput, { type: "permission.asked" }>
-type Tool = { readonly name: string; readonly input: ToolInput }
+type PermissionEvent = Extract<OpenCodeEvent, { type: "permission.asked" }>
+type Tool = { readonly id: string; readonly name: string; readonly input: ToolInput }
+type Preview = ReturnType<typeof diff>
 
 type Input = {
   readonly client: OpenCodeClient
   readonly connection: ACPConnection.Interface
   readonly event: PermissionEvent
-  readonly sessionID: string
+  readonly sessionID: Session.ID
   readonly clientSessionID: string
   readonly cwd: string
   readonly tool?: Tool
-  readonly toolCallPrefix?: string
-  readonly titlePrefix?: string
+  readonly child?: ACPChild.Session
+  readonly settled: Effect.Effect<void>
 }
 
 const options: PermissionOption[] = [
@@ -27,15 +33,18 @@ const options: PermissionOption[] = [
   { optionId: "reject", kind: "reject_once", name: "Reject" },
 ]
 
-/**
- * Asks the client, then replies to the server. Once `cancelled` completes, the client's request is cancelled or never
- * sent, and the server gets `reject`. The server reply is uninterruptible, so a server that is alive but stuck can
- * hold a cancel past `CancelDrainTimeout`; a dead server fails fast.
- */
+const decodeFiles = Schema.decodeUnknownOption(Schema.Array(FileDiff.Info))
+
 export const reply = Effect.fn("cli.acp.permission.reply")(function* (input: Input, cancelled: Effect.Effect<void>) {
   yield* Effect.uninterruptibleMask((restore) =>
     // The race starts racers in order and stops once one is done, so an earlier cancel never starts the ask.
-    restore(cancelled.pipe(Effect.as("reject" as const), Effect.raceFirst(ask(input)))).pipe(
+    restore(
+      cancelled.pipe(
+        Effect.as("reject" as const),
+        Effect.raceFirst(input.settled.pipe(Effect.as("settled" as const))),
+        Effect.raceFirst(ask(input)),
+      ),
+    ).pipe(
       Effect.tapCauseIf(Cause.hasDies, (cause) => Effect.logWarning("ACP permission ask failed", cause)),
       Effect.catchCause(() => Effect.succeed("reject" as const)),
       Effect.flatMap((decision) => respond(input, decision)),
@@ -45,23 +54,25 @@ export const reply = Effect.fn("cli.acp.permission.reply")(function* (input: Inp
 
 const ask = Effect.fnUntraced(function* (input: Input) {
   const toolName = input.tool?.name ?? input.event.data.action
-  const toolInput = { ...input.event.data.metadata, ...input.tool?.input }
-  const previews = yield* permissionPreviews(toolName, toolInput, input.cwd)
-  const toolCallID = input.event.data.source?.id ?? input.event.data.id
+  const toolInput = input.tool?.input ?? input.event.data.metadata ?? {}
+  const previews = yield* permissionPreviews(toolName, toolInput, input.event.data.metadata, input.cwd).pipe(
+    Effect.orElseSucceed((): Preview[] => []),
+  )
+  const title = permissionTitle(toolName, toolInput, previews)
+  const toolCall = pendingToolCall({
+    toolCallId: ACPChild.toolCallID(input.child, input.tool?.id ?? input.event.data.id),
+    toolName,
+    state: { input: toolInput, title: title ? ACPChild.prefixTitle(input.child, title) : input.child?.title },
+    cwd: input.cwd,
+  })
   const result = yield* input.connection.requestPermission({
     sessionId: input.clientSessionID,
     toolCall: {
-      ...pendingToolCall({
-        toolCallId: input.toolCallPrefix ? `${input.toolCallPrefix}:${toolCallID}` : toolCallID,
-        toolName,
-        state: {
-          input: toolInput,
-          title: prefixedTitle(input.titlePrefix, permissionTitle(toolName, toolInput, previews)),
-        },
-        cwd: input.cwd,
-      }),
-      locations: permissionLocations(toolName, toolInput, input.event.data.resources, input.cwd),
+      ...toolCall,
+      rawInput: input.tool ? toolCall.rawInput : undefined,
+      locations: permissionLocations(toolName, toolInput, input.event.data, input.cwd),
       ...(previews.length > 0 ? { content: previews } : {}),
+      ...(input.child ? { _meta: ACPChild.meta(input.child) } : {}),
     },
     options,
   })
@@ -69,41 +80,38 @@ const ask = Effect.fnUntraced(function* (input: Input) {
   return selected === "once" || selected === "always" ? selected : "reject"
 })
 
-function respond(input: Input, decision: PermissionReplyInput["decision"]) {
-  return ACPPromise.promise(() =>
-    input.client.permission.reply({ sessionID: input.sessionID, requestID: input.event.data.id, decision }),
+function respond(input: Input, decision: Permission.Reply | "settled") {
+  if (decision === "settled") return Effect.void
+  return input.client.permission.reply({ sessionID: input.sessionID, requestID: input.event.data.id, decision }).pipe(
+    Effect.catchTag("PermissionNotFoundError", () => Effect.void),
+    Effect.catch(ACPClient.classify),
   )
 }
 
-function prefixedTitle(prefix: string | undefined, title: string | undefined) {
-  if (!prefix) return title
-  if (!title) return prefix
-  return `${prefix}: ${title}`
-}
-
-const permissionPreviews = Effect.fnUntraced(function* (toolName: string, input: ToolInput, cwd: string) {
+// Core trims the patch tool's diffs for display, which breaks `applyPatch`, so its previews come from its own hunks.
+const permissionPreviews = Effect.fnUntraced(function* (
+  toolName: string,
+  input: ToolInput,
+  metadata: ToolInput | undefined,
+  cwd: string,
+) {
   const tool = toolName.toLocaleLowerCase()
   if (tool === "patch" || tool === "apply_patch") return yield* patchPreviews(input, cwd)
-  const file = filePath(input)
-  if (!file) return []
-  const path = absolutePath(file, cwd)
-  if (tool === "write") {
-    const content = stringValue(input.content)
-    if (content === undefined) return []
-    const oldText = yield* readText(path)
-    return [diff(path, oldText, content)]
-  }
-  if (tool !== "edit") return []
-  const oldString = stringValue(input.oldString)
-  const newString = stringValue(input.newString)
-  if (oldString === undefined || newString === undefined) return []
-  const oldText = yield* readText(path)
-  const newText =
-    input.replaceAll === true ? oldText.replaceAll(oldString, newString) : oldText.replace(oldString, newString)
-  return [diff(path, oldText, newText)]
+  const files = Option.getOrElse(decodeFiles(metadata?.files), () => [])
+  const previews = yield* Effect.forEach(
+    files,
+    (file) =>
+      Effect.gen(function* () {
+        const path = absolutePath(file.file, cwd)
+        const oldText = file.status === "added" ? null : yield* Effect.tryPromise(() => Bun.file(path).text())
+        const newText = yield* Effect.try(() => applyPatch(oldText ?? "", file.patch))
+        return newText === false ? [] : [diff(path, oldText, newText)]
+      }),
+    { concurrency: "unbounded" },
+  )
+  return previews.flat()
 })
 
-// Patch.derive throws when a hunk does not match the current file; the patch then gets no previews.
 function patchPreviews(input: ToolInput, cwd: string) {
   return Effect.forEach(
     patchHunks(input),
@@ -112,22 +120,22 @@ function patchPreviews(input: ToolInput, cwd: string) {
         const path = absolutePath(hunk.path, cwd)
         if (hunk.type === "add") {
           const newText = hunk.contents.endsWith("\n") || hunk.contents === "" ? hunk.contents : `${hunk.contents}\n`
-          return diff(path, "", newText)
+          return diff(path, null, newText)
         }
-        const oldText = yield* readText(path)
+        const oldText = yield* Effect.tryPromise(() => Bun.file(path).text())
         if (hunk.type === "delete") return diff(path, oldText, "")
         const derived = yield* Effect.try(() => Patch.derive(hunk.path, hunk.chunks, oldText))
         return diff(hunk.movePath ? absolutePath(hunk.movePath, cwd) : path, oldText, derived.content)
       }),
     { concurrency: "unbounded" },
-  ).pipe(Effect.orElseSucceed((): ToolCallContent[] => []))
+  )
 }
 
-function diff(path: string, oldText: string, newText: string): ToolCallContent {
-  return { type: "diff", path, oldText, newText }
+function diff(path: string, oldText: string | null, newText: string) {
+  return { type: "diff" as const, path, oldText, newText }
 }
 
-function permissionTitle(toolName: string, input: ToolInput, previews: ReadonlyArray<ToolCallContent>) {
+function permissionTitle(toolName: string, input: ToolInput, previews: ReadonlyArray<Preview>) {
   if (previews.length > 1) return `${previews.length} files`
   switch (toolName.toLocaleLowerCase()) {
     case "external_directory":
@@ -144,26 +152,22 @@ function permissionTitle(toolName: string, input: ToolInput, previews: ReadonlyA
     case "write":
     case "patch":
     case "apply_patch":
-      return filePath(input) ?? (previews[0]?.type === "diff" ? previews[0].path : undefined)
+      return filePath(input) ?? previews[0]?.path
     default:
       return undefined
   }
 }
 
-function permissionLocations(
-  toolName: string,
-  input: ToolInput,
-  resources: ReadonlyArray<string>,
-  cwd: string,
-): ToolCallLocation[] {
+function permissionLocations(toolName: string, input: ToolInput, ask: PermissionEvent["data"], cwd: string) {
   const locations = toLocations(toolName, input, cwd)
-  if (locations.length > 0) return locations
-  return resources.filter((resource) => resource !== "*").map((path) => ({ path: absolutePath(path, cwd) }))
+  if (locations.length > 0 || !PathActions.has(ask.action)) return locations
+  const paths = ask.resources.flatMap((resource) => {
+    const path = resource.endsWith("/*") ? resource.slice(0, -2) : resource
+    return path && !/[*?]/.test(path) ? [absolutePath(path, cwd)] : []
+  })
+  return Array.from(new Set(paths), (path) => ({ path }))
 }
 
-// A missing file previews as empty.
-function readText(path: string) {
-  return Effect.tryPromise(() => Bun.file(path).text()).pipe(Effect.orElseSucceed(() => ""))
-}
+const PathActions = new Set(["read", "edit", "external_directory"])
 
 export * as ACPPermission from "./permission"

packages/cli/src/acp/promise.ts

@@ -1,21 +0,0 @@
-import { RequestError } from "@agentclientprotocol/sdk"
-import { ClientError, isInvalidRequestError, isSessionNotFoundError } from "@opencode/client/promise"
-import { Effect } from "effect"
-import { ACPError } from "./error"
-
-/** Runs a promise, keeping ACP failures typed. Any other rejection is a defect. */
-export const promise = <A>(evaluate: (signal: AbortSignal) => Promise<A>) =>
-  Effect.tryPromise({ try: evaluate, catch: (cause) => cause }).pipe(Effect.catch(classify))
-
-export function classify(cause: unknown): Effect.Effect<never, ACPError.Error | RequestError> {
-  if (cause instanceof RequestError || ACPError.is(cause)) return Effect.fail(cause)
-  if (cause instanceof ClientError && cause.reason === "Transport")
-    return Effect.fail(new ACPError.ServerUnavailableError())
-  if (isSessionNotFoundError(cause))
-    return Effect.fail(new ACPError.SessionNotFoundError({ sessionId: cause.sessionID }))
-  if (isInvalidRequestError(cause))
-    return Effect.fail(new ACPError.InvalidRequestError({ message: cause.message, field: cause.field }))
-  return Effect.die(cause)
-}
-
-export * as ACPPromise from "./promise"

packages/cli/src/acp/replay.ts

@@ -0,0 +1,127 @@
+import type { SessionUpdate } from "@agentclientprotocol/sdk"
+import type { OpenCodeClient } from "@opencode/client/effect"
+import type { SessionMessage } from "@opencode/schema/session-message"
+import { Effect, Option, Stream } from "effect"
+import type { Capabilities } from "./capabilities"
+import { ACPClient } from "./client"
+import { ACPCompaction } from "./compaction"
+import type { ACPConnection } from "./connection"
+import { partsToContentChunks } from "./content"
+import type { Attached } from "./sessions"
+import { ACPTranslate } from "./translate"
+import { completedToolUpdate, errorToolUpdate, pendingToolCall, runningToolUpdate } from "./tool"
+
+export function history(
+  client: OpenCodeClient,
+  connection: ACPConnection.Interface,
+  attached: Attached,
+  capabilities: Capabilities,
+) {
+  return Stream.paginate(undefined, (cursor: string | undefined) =>
+    (cursor
+      ? client.message.list({ sessionID: attached.id, limit: 200, cursor })
+      : client.message.list({ sessionID: attached.id, limit: 200, order: "asc" })
+    ).pipe(
+      Effect.catch(ACPClient.classify),
+      Effect.map((page) => [page.data, Option.fromNullishOr(page.cursor.next)] as const),
+    ),
+  ).pipe(
+    Stream.runForEach((message) =>
+      Effect.forEach(
+        updates(message, attached.cwd, capabilities),
+        (update) => connection.sessionUpdate({ sessionId: attached.id, update }),
+        { discard: true },
+      ),
+    ),
+  )
+}
+
+export function updates(message: SessionMessage.Info, cwd: string, capabilities: Capabilities): SessionUpdate[] {
+  if (message.type === "user")
+    return [
+      { sessionUpdate: "user_message_chunk", messageId: message.id, content: { type: "text", text: message.text } },
+      ...partsToContentChunks(
+        (message.files ?? []).map((file) => ({
+          type: "file",
+          url: file.source.type === "uri" ? file.source.uri : `data:${file.mime};base64,${file.data}`,
+          filename: file.name,
+          mime: file.mime,
+        })),
+      ).map((chunk) => ({ sessionUpdate: "user_message_chunk" as const, messageId: message.id, ...chunk })),
+    ]
+  if (message.type === "compaction") {
+    const update = ACPCompaction.replay(message, capabilities.compaction)
+    return update ? [update] : []
+  }
+  if (message.type !== "assistant") return []
+  // Live reasoning ordinals count only reasoning parts, not the mixed content array.
+  const reasoning = message.content.filter((part) => part.type === "reasoning")
+  return message.content.flatMap((part): SessionUpdate[] => {
+    if (part.type === "text")
+      return [
+        { sessionUpdate: "agent_message_chunk", messageId: message.id, content: { type: "text", text: part.text } },
+      ]
+    if (part.type === "reasoning")
+      return [
+        {
+          sessionUpdate: "agent_thought_chunk",
+          messageId: ACPTranslate.reasoningMessageID(message.id, reasoning.indexOf(part)),
+          content: { type: "text", text: part.text },
+        },
+      ]
+    const call: SessionUpdate = {
+      sessionUpdate: "tool_call",
+      ...pendingToolCall({
+        toolCallId: part.id,
+        toolName: part.name,
+        state: { input: part.state.status === "streaming" ? {} : part.state.input },
+        cwd,
+      }),
+    }
+    switch (part.state.status) {
+      case "completed":
+        return [
+          call,
+          {
+            sessionUpdate: "tool_call_update",
+            ...completedToolUpdate({
+              toolCallId: part.id,
+              toolName: part.name,
+              input: part.state.input,
+              metadata: part.state.metadata,
+              content: part.state.content,
+              cwd,
+            }),
+          },
+        ]
+      case "running":
+        return [
+          call,
+          {
+            sessionUpdate: "tool_call_update",
+            ...runningToolUpdate({ toolCallId: part.id, toolName: part.name, state: { input: part.state.input }, cwd }),
+          },
+        ]
+      case "error":
+        return [
+          call,
+          {
+            sessionUpdate: "tool_call_update",
+            ...errorToolUpdate({
+              toolCallId: part.id,
+              toolName: part.name,
+              input: part.state.input,
+              metadata: part.state.metadata,
+              content: part.state.content,
+              error: part.state.error.message,
+              cwd,
+            }),
+          },
+        ]
+      case "streaming":
+        return [call]
+    }
+  })
+}
+
+export * as ACPReplay from "./replay"

packages/cli/src/acp/service.ts

@@ -1,12 +1,9 @@
-import {
-  isInvalidRequestError,
-  isSessionNotFoundError,
-  type ModelRef,
-  type OpenCodeClient,
-  type SessionMessageInfo,
-} from "@opencode/client/promise"
+import type { OpenCodeClient } from "@opencode/client/effect"
+import { SessionsCursor } from "@opencode/protocol/groups/session"
+import { Model } from "@opencode/schema/model"
+import { AbsolutePath } from "@opencode/schema/schema"
 import { FSUtil } from "@opencode/util/fs-util"
-import { Effect, Option, Ref, Result, Stream } from "effect"
+import { DateTime, Effect, Ref, Schema } from "effect"
 import { withTimestampedFallback } from "@opencode/util/session-title-fallback"
 import type {
   AuthenticateRequest,
@@ -25,11 +22,11 @@ import type {
   ListSessionsResponse,
   LoadSessionRequest,
   LoadSessionResponse,
+  McpServer,
   NewSessionRequest,
   NewSessionResponse,
   PromptRequest,
   PromptResponse,
-  RequestError,
   ResumeSessionRequest,
   ResumeSessionResponse,
   SetSessionConfigOptionRequest,
@@ -38,38 +35,34 @@ import type {
   SetSessionModeResponse,
 } from "@agentclientprotocol/sdk"
 import { OPENCODE_VERSION } from "../version"
+import { ACPCapabilities, type Capabilities } from "./capabilities"
 import type { ACPCatalog, Catalog } from "./catalog"
+import { ACPClient } from "./client"
 import { configOptions, currentModel, DEFAULT_VARIANT_VALUE, parseModelSelection } from "./config-option"
 import type { ACPConnection } from "./connection"
 import { ACPDirectories } from "./directories"
 import { ACPError } from "./error"
-import { ACPPromise } from "./promise"
-import type { ACPSessions, Attached } from "./sessions"
-import { ACPTranslate } from "./translate"
+import { ACPReplay } from "./replay"
+import type { ACPSessions, Attached, SupportedMcpServer } from "./sessions"
 import type { ACPTurn } from "./turn"
 
-export const AuthMethodID = "opencode-login"
-
-export type Failure = ACPError.Error | RequestError | ACPCatalog.Error
-
-/** What the client advertised in `initialize`. */
-export type Capabilities = { readonly childSessionUpdates: boolean; readonly formElicitation: boolean }
+const AuthMethodID = "opencode-login"
 
 export interface Interface {
   readonly initialize: (input: InitializeRequest) => Effect.Effect<InitializeResponse>
-  readonly authenticate: (input: AuthenticateRequest) => Effect.Effect<AuthenticateResponse, Failure>
-  readonly newSession: (input: NewSessionRequest) => Effect.Effect<NewSessionResponse, Failure>
-  readonly loadSession: (input: LoadSessionRequest) => Effect.Effect<LoadSessionResponse, Failure>
-  readonly listSessions: (input: ListSessionsRequest) => Effect.Effect<ListSessionsResponse, Failure>
-  readonly deleteSession: (input: DeleteSessionRequest) => Effect.Effect<DeleteSessionResponse, Failure>
-  readonly resumeSession: (input: ResumeSessionRequest) => Effect.Effect<ResumeSessionResponse, Failure>
-  readonly closeSession: (input: CloseSessionRequest) => Effect.Effect<CloseSessionResponse, Failure>
-  readonly forkSession: (input: ForkSessionRequest) => Effect.Effect<ForkSessionResponse, Failure>
+  readonly authenticate: (input: AuthenticateRequest) => Effect.Effect<AuthenticateResponse, ACPError.Failure>
+  readonly newSession: (input: NewSessionRequest) => Effect.Effect<NewSessionResponse, ACPError.Failure>
+  readonly loadSession: (input: LoadSessionRequest) => Effect.Effect<LoadSessionResponse, ACPError.Failure>
+  readonly listSessions: (input: ListSessionsRequest) => Effect.Effect<ListSessionsResponse, ACPError.Failure>
+  readonly deleteSession: (input: DeleteSessionRequest) => Effect.Effect<DeleteSessionResponse, ACPError.Failure>
+  readonly resumeSession: (input: ResumeSessionRequest) => Effect.Effect<ResumeSessionResponse, ACPError.Failure>
+  readonly closeSession: (input: CloseSessionRequest) => Effect.Effect<CloseSessionResponse, ACPError.Failure>
+  readonly forkSession: (input: ForkSessionRequest) => Effect.Effect<ForkSessionResponse, ACPError.Failure>
   readonly setSessionConfigOption: (
     input: SetSessionConfigOptionRequest,
-  ) => Effect.Effect<SetSessionConfigOptionResponse, Failure>
-  readonly setSessionMode: (input: SetSessionModeRequest) => Effect.Effect<SetSessionModeResponse, Failure>
-  readonly prompt: (input: PromptRequest, signal: AbortSignal) => Effect.Effect<PromptResponse, Failure>
+  ) => Effect.Effect<SetSessionConfigOptionResponse, ACPError.Failure>
+  readonly setSessionMode: (input: SetSessionModeRequest) => Effect.Effect<SetSessionModeResponse, ACPError.Failure>
+  readonly prompt: (input: PromptRequest, signal: AbortSignal) => Effect.Effect<PromptResponse, ACPError.Failure>
   readonly cancel: (input: CancelNotification) => Effect.Effect<void>
 }
 
@@ -85,8 +78,7 @@ export function make(input: {
     return configOptions(yield* input.catalog.get(attached.cwd), yield* Ref.get(attached.selection))
   })
 
-  // A selection the catalog has not seen may be new on the server, so reload once before rejecting it.
-  const withReload = <A>(attached: Attached, select: Effect.Effect<A, Failure>) => {
+  const withReload = <A>(attached: Attached, select: Effect.Effect<A, ACPError.Failure>) => {
     const retry = () => input.catalog.reload(attached.cwd).pipe(Effect.andThen(select))
     return select.pipe(
       Effect.catchTags({ ACPInvalidModelError: retry, ACPInvalidModeError: retry, ACPInvalidEffortError: retry }),
@@ -108,54 +100,33 @@ export function make(input: {
     }
   })
 
-  // Both selectors update the selection before switching on the server, so the echoed event diffs to no change.
-  const selectModel = Effect.fnUntraced(function* (attached: Attached, model: ModelRef) {
+  // Update selection before switching so the echoed event is a no-op.
+  const selectModel = Effect.fnUntraced(function* (attached: Attached, model: Model.Ref) {
     yield* Ref.update(attached.selection, (selection) => ({ ...selection, model }))
-    yield* ACPPromise.promise(() => input.client.session.switchModel({ sessionID: attached.id, model }))
+    yield* input.client.session.switchModel({ sessionID: attached.id, model }).pipe(Effect.catch(ACPClient.classify))
   })
 
   const selectMode = Effect.fnUntraced(function* (attached: Attached, modeID: string) {
     const catalog = yield* input.catalog.get(attached.cwd)
-    if (!catalog.modes.some((mode) => mode.id === modeID)) return yield* new ACPError.InvalidModeError({ mode: modeID })
-    yield* Ref.update(attached.selection, (selection) => ({ ...selection, modeID }))
-    yield* ACPPromise.promise(() => input.client.session.switchAgent({ sessionID: attached.id, agent: modeID }))
+    const mode = catalog.modes.find((item) => item.id === modeID)
+    if (!mode) return yield* new ACPError.InvalidModeError({ mode: modeID })
+    yield* Ref.update(attached.selection, (selection) => ({ ...selection, modeID: mode.id }))
+    yield* input.client.session
+      .switchAgent({ sessionID: attached.id, agent: mode.id })
+      .pipe(Effect.catch(ACPClient.classify))
   })
 
-  const getSession = Effect.fnUntraced(function* (sessionID: string, cwd: string) {
-    const session = yield* ACPPromise.promise(() => input.client.session.get({ sessionID }))
+  const getSession = Effect.fnUntraced(function* (sessionId: string, cwd: string) {
+    const sessionID = yield* ACPClient.decodeSessionID(sessionId)
+    const session = yield* input.client.session.get({ sessionID }).pipe(Effect.catch(ACPClient.classify))
     if (FSUtil.resolve(cwd) !== FSUtil.resolve(session.location.directory))
-      return yield* new ACPError.SessionDirectoryMismatchError({ sessionId: sessionID, cwd })
+      return yield* new ACPError.SessionDirectoryMismatchError({ sessionId, cwd })
     return session
   })
 
-  const replay = (attached: Attached) =>
-    Stream.paginate(undefined, (cursor: string | undefined) =>
-      ACPPromise.promise(() =>
-        cursor
-          ? input.client.message.list({ sessionID: attached.id, limit: 200, cursor })
-          : input.client.message.list({ sessionID: attached.id, limit: 200, order: "asc" }),
-      ).pipe(Effect.map((page) => [page.data, Option.fromNullishOr(page.cursor.next)] as const)),
-    ).pipe(Stream.runForEach((message) => replayMessage(attached, message)))
-
-  // A message that fails to translate keeps the updates before the failure and does not stop the replay.
-  const replayMessage = Effect.fnUntraced(function* (attached: Attached, message: SessionMessageInfo) {
-    const updates = ACPTranslate.replayMessage(message, attached.cwd)
-    while (true) {
-      const next = yield* Effect.result(Effect.try(() => updates.next()))
-      if (Result.isFailure(next))
-        return yield* Effect.logWarning("ACP replay skipped the rest of a message", message.id, next.failure.cause)
-      if (next.success.done) return
-      yield* input.connection.sessionUpdate({ sessionId: attached.id, update: next.success.value })
-    }
-  })
-
   return {
     initialize: Effect.fnUntraced(function* (params) {
-      const elicitation = params.clientCapabilities?.elicitation
-      yield* Ref.set(input.capabilities, {
-        childSessionUpdates: params.clientCapabilities?._meta?.[ACPTranslate.ChildSessionUpdatesCapability] === true,
-        formElicitation: elicitation?.form !== undefined && elicitation.form !== null,
-      })
+      yield* Ref.set(input.capabilities, ACPCapabilities.parse(params.clientCapabilities))
       const authMethod: AuthMethod = {
         description: "Run `opencode auth login` in the terminal",
         name: "Login with opencode",
@@ -173,7 +144,7 @@ export function make(input: {
           mcpCapabilities: { http: true, sse: false },
           promptCapabilities: { embeddedContext: true, image: true },
           sessionCapabilities: { additionalDirectories: {}, close: {}, delete: {}, fork: {}, list: {}, resume: {} },
-          _meta: { [ACPTranslate.ChildSessionUpdatesCapability]: true },
+          _meta: { [ACPCapabilities.ChildSessionUpdates]: true },
         },
         authMethods: [authMethod],
         agentInfo: { name: "OpenCode", version: OPENCODE_VERSION },
@@ -186,38 +157,41 @@ export function make(input: {
     }),
     newSession: Effect.fnUntraced(function* (params) {
       const directories = yield* ACPDirectories.parse(params.cwd, params.additionalDirectories)
-      // Load before creating so a catalog failure leaves no session behind. Agent and model stay unset
-      // so the server resolves its defaults after plugins activate.
+      const mcpServers = yield* supportedMcpServers(params.mcpServers)
+      // Load first so a catalog failure leaves no session.
       yield* input.catalog.get(params.cwd)
-      const created = yield* ACPPromise.promise(() =>
-        input.client.session.create({
-          location: { directory: params.cwd },
-          ...ACPDirectories.grant(directories),
-        }),
-      )
-      const attached = yield* input.sessions.attach(created, params.cwd, params.mcpServers)
-      return { sessionId: attached.id, configOptions: yield* currentOptions(attached) }
+      const created = yield* input.client.session
+        .create({ location: { directory: AbsolutePath.make(params.cwd) }, ...ACPDirectories.grant(directories) })
+        .pipe(Effect.catch(ACPClient.classify))
+      const attachment = yield* input.sessions.attach(created, params.cwd, mcpServers)
+      return { sessionId: attachment.attached.id, configOptions: attachment.configOptions }
     }),
     loadSession: Effect.fnUntraced(function* (params) {
       const directories = yield* ACPDirectories.parse(params.cwd, params.additionalDirectories)
+      const mcpServers = yield* supportedMcpServers(params.mcpServers)
       const session = yield* getSession(params.sessionId, params.cwd)
       yield* ACPDirectories.activate(input.client, session, directories)
-      const attached = yield* input.sessions.attach(session, session.location.directory, params.mcpServers)
-      return yield* replay(attached).pipe(
-        Effect.andThen(currentOptions(attached)),
+      const attachment = yield* input.sessions.attach(session, session.location.directory, mcpServers)
+      return yield* ACPReplay.history(
+        input.client,
+        input.connection,
+        attachment.attached,
+        yield* Ref.get(input.capabilities),
+      ).pipe(
+        Effect.andThen(currentOptions(attachment.attached)),
         Effect.map((configOptions) => ({ configOptions })),
-        Effect.onError(() => input.sessions.detach(attached.id)),
+        Effect.onError(() => input.sessions.release(attachment.attached)),
       )
     }),
     listSessions: Effect.fnUntraced(function* (params) {
-      const page = yield* ACPPromise.promise(() =>
-        input.client.session.list({
-          ...(params.cwd ? { directory: params.cwd } : {}),
+      const page = yield* input.client.session
+        .list({
+          ...(params.cwd ? { directory: AbsolutePath.make(params.cwd) } : {}),
           order: "desc",
           limit: 100,
-          ...(params.cursor ? { cursor: params.cursor } : {}),
-        }),
-      )
+          ...(params.cursor ? { cursor: Schema.decodeSync(SessionsCursor)(params.cursor) } : {}),
+        })
+        .pipe(Effect.catch(ACPClient.classify))
       return {
         sessions: page.data.map((session) => {
           const additionalDirectories = ACPDirectories.list(session)
@@ -225,30 +199,32 @@ export function make(input: {
             sessionId: session.id,
             cwd: session.location.directory,
             ...(additionalDirectories.length > 0 ? { additionalDirectories } : {}),
-            title: withTimestampedFallback(session),
-            updatedAt: new Date(session.time.updated).toISOString(),
+            title: withTimestampedFallback({
+              ...session,
+              time: { created: DateTime.toEpochMillis(session.time.created) },
+            }),
+            updatedAt: DateTime.formatIso(session.time.updated),
           }
         }),
         ...(page.cursor.next ? { nextCursor: page.cursor.next } : {}),
       }
     }),
     deleteSession: Effect.fnUntraced(function* (params) {
-      // A malformed ID fails the server's path decode, and the session ID is the only path param.
-      yield* ACPPromise.promise(() =>
-        input.client.session.remove({ sessionID: params.sessionId }).catch((error) => {
-          if (isSessionNotFoundError(error) || (isInvalidRequestError(error) && error.kind === "Params")) return
-          throw error
-        }),
+      yield* ACPClient.decodeSessionID(params.sessionId).pipe(
+        Effect.flatMap((sessionID) => input.client.session.remove({ sessionID })),
+        Effect.catchTag(["ACPInvalidRequestError", "SessionNotFoundError"], () => Effect.void),
+        Effect.catch(ACPClient.classify),
       )
       yield* input.sessions.detach(params.sessionId)
       return {}
     }),
     resumeSession: Effect.fnUntraced(function* (params) {
       const directories = yield* ACPDirectories.parse(params.cwd, params.additionalDirectories)
+      const mcpServers = yield* supportedMcpServers(params.mcpServers)
       const session = yield* getSession(params.sessionId, params.cwd)
       yield* ACPDirectories.activate(input.client, session, directories)
-      const attached = yield* input.sessions.attach(session, session.location.directory, params.mcpServers ?? [])
-      return { configOptions: yield* currentOptions(attached) }
+      const attachment = yield* input.sessions.attach(session, session.location.directory, mcpServers)
+      return { configOptions: attachment.configOptions }
     }),
     closeSession: Effect.fnUntraced(function* (params) {
       yield* input.turn.close(params.sessionId)
@@ -257,14 +233,13 @@ export function make(input: {
     }),
     forkSession: Effect.fnUntraced(function* (params) {
       const directories = yield* ACPDirectories.parse(params.cwd, params.additionalDirectories)
-      const forked = yield* ACPPromise.promise(() => input.client.session.fork({ sessionID: params.sessionId }))
-      // Forks copy the source session's rules, so the request list replaces any inherited grants.
+      const mcpServers = yield* supportedMcpServers(params.mcpServers)
+      const sessionID = yield* ACPClient.decodeSessionID(params.sessionId)
+      const forked = yield* input.client.session.fork({ sessionID }).pipe(Effect.catch(ACPClient.classify))
+      // Forks inherit the source's grants; replace them with this request's.
       yield* ACPDirectories.activate(input.client, forked, directories)
-      const attached = yield* input.sessions.attach(forked, forked.location.directory, params.mcpServers ?? [])
-      return yield* currentOptions(attached).pipe(
-        Effect.map((configOptions) => ({ sessionId: attached.id, configOptions })),
-        Effect.onError(() => input.sessions.detach(attached.id)),
-      )
+      const attachment = yield* input.sessions.attach(forked, forked.location.directory, mcpServers)
+      return { sessionId: attachment.attached.id, configOptions: attachment.configOptions }
     }),
     setSessionConfigOption: Effect.fnUntraced(function* (params) {
       const attached = yield* input.sessions.require(params.sessionId)
@@ -283,29 +258,41 @@ export function make(input: {
   }
 }
 
-const requireModel = Effect.fnUntraced(function* (catalog: Catalog, modelID: string, current: ModelRef) {
+const supportedMcpServers = Effect.fnUntraced(function* (servers: readonly McpServer[] = []) {
+  const supported = servers.filter(
+    (server): server is SupportedMcpServer => !("type" in server) || server.type === "http",
+  )
+  if (supported.length < servers.length)
+    return yield* new ACPError.InvalidRequestError({
+      message: "Only stdio and HTTP MCP servers are supported",
+      field: "mcpServers",
+    })
+  return supported
+})
+
+const requireModel = Effect.fnUntraced(function* (catalog: Catalog, modelID: string, current: Model.Ref) {
   const selected = parseModelSelection(modelID, catalog.providers)
   const model = catalog.models.find(
     (item) => item.providerID === selected.model.providerID && item.id === selected.model.modelID,
   )
   if (!model) return yield* new ACPError.InvalidModelError({ providerId: selected.model.providerID, modelId: modelID })
-  if (selected.variant && !model.variants.some((variant) => variant.id === selected.variant))
-    return yield* new ACPError.InvalidEffortError({ effort: selected.variant })
+  const selectedVariant = model.variants.find((variant) => variant.id === selected.variant)
+  if (selected.variant && !selectedVariant) return yield* new ACPError.InvalidEffortError({ effort: selected.variant })
   const variant =
-    selected.variant ??
+    selectedVariant?.id ??
     (current.providerID === model.providerID &&
     current.id === model.id &&
     (current.variant === DEFAULT_VARIANT_VALUE || model.variants.some((variant) => variant.id === current.variant))
       ? current.variant
       : undefined)
-  return { providerID: model.providerID, id: model.id, variant } satisfies ModelRef
+  return { providerID: model.providerID, id: model.id, variant } satisfies Model.Ref
 })
 
-const requireEffort = Effect.fnUntraced(function* (catalog: Catalog, effort: string, current: ModelRef) {
+const requireEffort = Effect.fnUntraced(function* (catalog: Catalog, effort: string, current: Model.Ref) {
   const model = catalog.models.find((item) => item.providerID === current.providerID && item.id === current.id)
   if (!model || (effort !== DEFAULT_VARIANT_VALUE && !model.variants.some((variant) => variant.id === effort)))
     return yield* new ACPError.InvalidEffortError({ effort })
-  return { ...current, variant: effort } satisfies ModelRef
+  return { ...current, variant: Model.VariantID.make(effort) } satisfies Model.Ref
 })
 
 export * as ACPService from "./service"

packages/cli/src/acp/sessions.ts

@@ -1,43 +1,38 @@
 import { isDeepStrictEqual } from "node:util"
-import type { McpServer, RequestError } from "@agentclientprotocol/sdk"
-import type { OpenCodeClient, OpenCodeEvent, SessionInfo } from "@opencode/client/promise"
-import { Context, Deferred, Effect, Exit, Queue, Ref, Scope, Stream } from "effect"
+import type { McpServer, SessionConfigOption } from "@agentclientprotocol/sdk"
+import type { OpenCodeClient, OpenCodeEvent } from "@opencode/client/effect"
+import { Mcp } from "@opencode/schema/mcp"
+import type { Session } from "@opencode/schema/session"
+import { Cause, Deferred, Effect, Exit, Queue, Ref, Scope, Stream } from "effect"
 import type { ACPCatalog, Catalog } from "./catalog"
+import { ACPClient } from "./client"
 import { availableCommands, configOptions, type Selection } from "./config-option"
 import { ACPConnection } from "./connection"
 import { ACPError } from "./error"
-import { ACPPromise } from "./promise"
+
+export type SupportedMcpServer = Exclude<McpServer, { readonly type: "acp" | "sse" }>
 
 export type Attached = {
-  readonly id: string
+  readonly id: Session.ID
   readonly cwd: string
   readonly selection: Ref.Ref<Selection>
 }
 
 export interface Interface {
-  /**
-   * Attaches a session in its own scope, closing any previous attachment of the same ID. Once the attaching request
-   * has responded, the scope follows the cwd's catalog and pushes config option and command updates while it is
-   * open. A failed attach leaves the session detached.
-   */
   readonly attach: (
-    session: SessionInfo,
+    session: Session.Info,
     cwd: string,
-    mcpServers: readonly McpServer[],
-  ) => Effect.Effect<Attached, ACPError.Error | RequestError | ACPCatalog.Error>
-  /** Closes the session scope. No-op when the session is not attached. */
+    mcpServers: readonly SupportedMcpServer[],
+  ) => Effect.Effect<{ readonly attached: Attached; readonly configOptions: SessionConfigOption[] }, ACPError.Failure>
   readonly detach: (sessionID: string) => Effect.Effect<void>
+  readonly release: (attached: Attached) => Effect.Effect<void>
   readonly require: (sessionID: string) => Effect.Effect<Attached, ACPError.SessionNotFoundError>
-  /** Forks work into this attachment's scope, so it ends on detach or re-attach. Fails once the attachment is gone. */
   readonly fork: (attached: Attached, effect: Effect.Effect<void>) => Effect.Effect<void, ACPError.SessionNotFoundError>
 }
 
-export class Service extends Context.Service<Service, Interface>()("@opencode/cli/acp/Sessions") {}
-
 type Entry = {
   readonly attached: Attached
   readonly scope: Scope.Closeable
-  /** Selection changes from other clients, applied by the session's fold. */
   readonly selected: Queue.Queue<Selection>
 }
 
@@ -50,12 +45,12 @@ export const make = Effect.fnUntraced(function* (input: {
 }) {
   const scope = yield* Effect.scope
   const sessions = new Map<string, Entry>()
-  // Kept across re-attachment so resuming with the same servers does not add them again.
-  const registeredMcp = new Map<string, Set<string>>()
+  // Outlives entries so re-attaching does not re-add servers.
+  const registeredMcpBySession = new Map<string, Map<string, Mcp.ServerConfig>>()
   const connected = yield* Deferred.make<void>()
 
   // Subscribe before any attach so a switch right after `sessions.set` reaches the session.
-  yield* Stream.fromAsyncIterable(input.client.event.subscribe(), (cause) => cause).pipe(
+  yield* input.client.event.subscribe().pipe(
     Stream.tap((event) => (event.type === "server.connected" ? Deferred.succeed(connected, undefined) : Effect.void)),
     Stream.filter(
       (event): event is SelectedEvent =>
@@ -69,7 +64,9 @@ export const make = Effect.fnUntraced(function* (input: {
         event.type === "session.model.selected" ? { model: event.data.model } : { modeID: event.data.agent },
       )
     }),
-    Effect.ignore,
+    Effect.catchCause((cause) =>
+      Cause.hasInterruptsOnly(cause) ? Effect.void : Effect.logWarning("ACP selection event stream failed", cause),
+    ),
     Effect.ensuring(Deferred.succeed(connected, undefined)),
     Effect.forkScoped,
   )
@@ -92,22 +89,20 @@ export const make = Effect.fnUntraced(function* (input: {
     if (!isDeepStrictEqual(next.commands, previous.commands)) yield* sendCommands(attached.id, next)
   })
 
-  const registerMcp = (attached: Attached, servers: readonly McpServer[]) =>
+  const registerMcp = (attached: Attached, servers: readonly SupportedMcpServer[]) =>
     Effect.suspend(() => {
-      const registered = registeredMcp.get(attached.id) ?? new Set<string>()
-      registeredMcp.set(attached.id, registered)
+      const registered = registeredMcpBySession.get(attached.id) ?? new Map<string, Mcp.ServerConfig>()
+      registeredMcpBySession.set(attached.id, registered)
       return Effect.forEach(
         servers,
         (server) =>
           Effect.suspend(() => {
             const config = mcpConfig(server)
-            const key = `${server.name}:${stableStringify(config)}`
-            if (registered.has(key)) return Effect.void
-            registered.add(key)
-            return ACPPromise.promise(() =>
-              input.client.mcp.add({ server: server.name, location: { directory: attached.cwd }, config }),
-            ).pipe(
-              Effect.onError(() => Effect.sync(() => registered.delete(key))),
+            if (isDeepStrictEqual(registered.get(server.name), config)) return Effect.void
+            registered.set(server.name, config)
+            return input.client.mcp.add({ server: server.name, location: { directory: attached.cwd }, config }).pipe(
+              Effect.catch(ACPClient.classify),
+              Effect.onError(() => Effect.sync(() => registered.delete(server.name))),
               Effect.uninterruptible,
             )
           }),
@@ -119,12 +114,12 @@ export const make = Effect.fnUntraced(function* (input: {
     Effect.suspend(() => {
       if (sessions.get(sessionID) === entry) {
         sessions.delete(sessionID)
-        registeredMcp.delete(sessionID)
+        registeredMcpBySession.delete(sessionID)
       }
       return Scope.close(entry.scope, Exit.void)
     })
 
-  return Service.of({
+  return {
     attach: Effect.fn("cli.acp.sessions.attach")(function* (session, cwd, mcpServers) {
       yield* Deferred.await(connected)
       const current = yield* input.catalog.get(cwd)
@@ -143,9 +138,8 @@ export const make = Effect.fnUntraced(function* (input: {
       if (replaced) yield* Scope.close(replaced.scope, Exit.void)
       yield* registerMcp(entry.attached, mcpServers).pipe(Effect.onError(() => remove(session.id, entry)))
       const responded = yield* ACPConnection.Responded
-      // Updates wait for the response that hands the client this session. `changes` emits the latest catalog
-      // first, so a reload since `current` is still pushed. One fold applies catalog and selection changes so
-      // pushes leave the client on the latest pair.
+      // `changes` replays the latest catalog, so a reload since `current` still pushes.
+      // One fold keeps catalog and selection consistent.
       yield* Effect.gen(function* () {
         yield* responded
         yield* sendCommands(session.id, current)
@@ -162,13 +156,20 @@ export const make = Effect.fnUntraced(function* (input: {
           ),
         )
       }).pipe(Effect.ignore, Effect.forkIn(entry.scope))
-      return entry.attached
+      return {
+        attached: entry.attached,
+        configOptions: configOptions(current, yield* Ref.get(entry.attached.selection)),
+      }
     }),
     detach: Effect.fn("cli.acp.sessions.detach")(function* (sessionID) {
       const entry = sessions.get(sessionID)
       if (entry) yield* remove(sessionID, entry)
     }),
-    require: Effect.fn("cli.acp.sessions.require")(function* (sessionID) {
+    release: Effect.fn("cli.acp.sessions.release")(function* (attached) {
+      const entry = sessions.get(attached.id)
+      if (entry?.attached === attached) yield* remove(attached.id, entry)
+    }),
+    require: Effect.fnUntraced(function* (sessionID) {
       const entry = sessions.get(sessionID)
       if (!entry) return yield* new ACPError.SessionNotFoundError({ sessionId: sessionID })
       return entry.attached
@@ -178,33 +179,23 @@ export const make = Effect.fnUntraced(function* (input: {
       if (entry?.attached !== attached) return yield* new ACPError.SessionNotFoundError({ sessionId: attached.id })
       yield* Effect.forkIn(effect, entry.scope, { startImmediately: true })
     }),
-  })
+  } satisfies Interface
 })
 
-function mcpConfig(server: McpServer) {
+function mcpConfig(server: SupportedMcpServer) {
   if ("type" in server) {
-    if (server.type === "acp") throw new Error("MCP-over-ACP is not supported")
-    return {
-      type: "remote" as const,
+    return new Mcp.RemoteConfig({
+      type: "remote",
       url: server.url,
       headers: Object.fromEntries(server.headers.map((header) => [header.name, header.value])),
-      oauth: false as const,
-    }
+      oauth: false,
+    })
   }
-  return {
-    type: "local" as const,
+  return new Mcp.LocalConfig({
+    type: "local",
     command: [server.command, ...server.args],
     environment: Object.fromEntries(server.env.map((entry) => [entry.name, entry.value])),
-  }
-}
-
-function stableStringify(value: unknown): string {
-  if (Array.isArray(value)) return `[${value.map(stableStringify).join(",")}]`
-  if (!value || typeof value !== "object") return JSON.stringify(value)
-  return `{${Object.entries(value)
-    .toSorted(([a], [b]) => a.localeCompare(b))
-    .map(([key, item]) => `${JSON.stringify(key)}:${stableStringify(item)}`)
-    .join(",")}}`
+  })
 }
 
 export * as ACPSessions from "./sessions"

packages/cli/src/acp/tool.ts

@@ -1,16 +1,13 @@
 import { isAbsolute, resolve } from "node:path"
 import type { ToolCall, ToolCallContent, ToolCallLocation, ToolCallUpdate, ToolKind } from "@agentclientprotocol/sdk"
+import type { Tool } from "@opencode/schema/tool"
 import { readDisplayText } from "@opencode/tui/mini/tool"
 import { Patch } from "@opencode/util/patch"
 import { Result } from "effect"
 
 export type ToolInput = Record<string, unknown>
-export type ToolContent = ReadonlyArray<
-  | { readonly type: "text"; readonly text: string }
-  | { readonly type: "file"; readonly uri: string; readonly mime: string; readonly name?: string | null }
->
 
-export function toToolKind(toolName: string): ToolKind {
+function toToolKind(toolName: string): ToolKind {
   switch (toolName.toLocaleLowerCase()) {
     case "bash":
     case "shell":
@@ -85,18 +82,16 @@ export function pendingToolCall(input: {
 export function runningToolUpdate(input: {
   readonly toolCallId: string
   readonly toolName: string
-  readonly state: { readonly input: ToolInput; readonly title?: string }
-  readonly content?: ToolContent
+  readonly state: { readonly input: ToolInput }
   readonly cwd: string
 }): ToolCallUpdate {
   return {
     toolCallId: input.toolCallId,
     status: "in_progress",
     kind: toToolKind(input.toolName),
-    title: toolTitle(input.toolName, input.state.input, input.state.title),
+    title: toolTitle(input.toolName, input.state.input),
     locations: toLocations(input.toolName, input.state.input, input.cwd),
     rawInput: rawInput(input.toolName, input.state.input, input.cwd),
-    ...(input.content?.length ? { content: toolContent(input.content) } : {}),
   }
 }
 
@@ -104,12 +99,11 @@ export function completedToolUpdate(input: {
   readonly toolCallId: string
   readonly toolName: string
   readonly input: ToolInput
-  readonly content: ToolContent
+  readonly content: ReadonlyArray<Tool.Content>
   readonly metadata?: Readonly<Record<string, unknown>>
   readonly cwd: string
 }): ToolCallUpdate {
   const normalized = toolContent(input.content)
-  // Read's model content is a JSON page envelope; show the clean text instead.
   const firstText = input.content.find((part) => part.type === "text")
   const read = input.toolName.toLocaleLowerCase() === "read" && firstText ? readDisplayText(firstText.text) : undefined
   const images = normalized.filter((part) => part.type === "content" && part.content.type === "image")
@@ -139,7 +133,7 @@ export function errorToolUpdate(input: {
   readonly toolCallId: string
   readonly toolName: string
   readonly input: ToolInput
-  readonly content?: ToolContent
+  readonly content?: ReadonlyArray<Tool.Content>
   readonly metadata?: Readonly<Record<string, unknown>>
   readonly error: string
   readonly cwd: string
@@ -148,7 +142,7 @@ export function errorToolUpdate(input: {
     toolCallId: input.toolCallId,
     status: "failed",
     kind: toToolKind(input.toolName),
-    title: toolTitle(input.toolName, input.input, undefined),
+    title: toolTitle(input.toolName, input.input),
     locations: toLocations(input.toolName, input.input, input.cwd),
     rawInput: rawInput(input.toolName, input.input, input.cwd),
     content: [...toolContent(input.content ?? []), { type: "content", content: { type: "text", text: input.error } }],
@@ -159,7 +153,7 @@ export function errorToolUpdate(input: {
   }
 }
 
-function toolContent(content: ToolContent): ToolCallContent[] {
+function toolContent(content: ReadonlyArray<Tool.Content>): ToolCallContent[] {
   return content.flatMap((part): ToolCallContent[] => {
     if (part.type === "text") return [{ type: "content", content: { type: "text", text: part.text } }]
     const match = /^data:([^;,]+)(?:;[^,]*)*;base64,(.*)$/.exec(part.uri)
@@ -168,7 +162,7 @@ function toolContent(content: ToolContent): ToolCallContent[] {
   })
 }
 
-function toolTitle(toolName: string, input: ToolInput, fallback: string | undefined) {
+function toolTitle(toolName: string, input: ToolInput, fallback?: string) {
   if (isShell(toolName)) return stringValue(input.command) ?? stringValue(input.cmd) ?? fallback ?? toolName
   return fallback || toolName
 }
@@ -209,5 +203,3 @@ export function absolutePath(path: string, cwd: string) {
 export function stringValue(value: unknown) {
   return typeof value === "string" ? value : undefined
 }
-
-export * as ACPTool from "./tool"

packages/cli/src/acp/translate.ts

@@ -1,33 +1,27 @@
 import type { PromptResponse, SessionUpdate } from "@agentclientprotocol/sdk"
-import type {
-  EventSubscribeOutput,
-  SessionMessageAssistant,
-  SessionMessageInfo,
-  SessionStructuredError,
-  TokenUsageInfo,
-} from "@opencode/client/promise"
-import { Event } from "@opencode/schema/event"
-import { SessionMessage } from "@opencode/schema/session-message"
+import type { OpenCodeEvent } from "@opencode/client/effect"
+import type { Session } from "@opencode/schema/session"
+import type { SessionError } from "@opencode/schema/session-error"
+import type { SessionMessage } from "@opencode/schema/session-message"
 import { TokenUsage } from "@opencode/schema/token-usage"
-import { partsToContentChunks, type ReplayPart } from "./content"
+import { ACPChild } from "./child"
+import { ACPCompaction } from "./compaction"
 import { ACPError } from "./error"
 import { completedToolUpdate, errorToolUpdate, pendingToolCall, runningToolUpdate, type ToolInput } from "./tool"
 
-export const ChildSessionUpdatesCapability = "opencode/child-session-updates"
-export const ChildSessionUpdateMethod = "opencode/session/child_update"
 const RetryMeta = "opencode/retry"
-const CompactionMeta = "opencode/compaction"
 
-export type TurnStart = { readonly type: "input" | "compaction"; readonly id: string }
+export type TurnStart = { readonly type: "input" | "compaction"; readonly id: SessionMessage.ID }
 
 export type Terminal = "succeeded" | "failed" | "interrupted"
 
 export type Context = {
-  readonly sessionID: string
+  readonly sessionID: Session.ID
   readonly cwd: string
   readonly start: TurnStart
   readonly childUpdates: boolean
-  /** A background consumer follows open children after the parent turn ends; it never writes `session/update`. */
+  readonly compaction: boolean
+  /** Background mode follows open children after the turn ends and never writes `session/update`. */
   readonly mode: "turn" | "background"
 }
 
@@ -42,86 +36,49 @@ type Tool = {
 type RetryStatus = {
   readonly attempt: number
   readonly nextRetryAt: string
-  readonly error: SessionStructuredError
+  readonly error: SessionError.Error
 }
 
-export type ChildSession = {
-  readonly id: string
-  readonly parentID: string
-  readonly depth: number
-  readonly title?: string
-}
-
-type ChildSessionEvent =
-  | { readonly type: "update"; readonly update: SessionUpdate }
-  | {
-      readonly type: "status"
-      readonly status: "created" | "running" | "completed" | "failed" | "interrupted"
-      readonly error?: { readonly type: string; readonly message: string }
-    }
-
-export type ChildSessionUpdate = {
-  readonly rootSessionId: string
-  readonly childSessionId: string
-  readonly parentSessionId: string
-  readonly depth: number
-  readonly title?: string
-} & ChildSessionEvent
-
 export type TurnState = {
   readonly started: boolean
   readonly tools: ReadonlyMap<string, Tool>
   readonly retries: ReadonlyMap<string, RetryStatus>
-  readonly compactions: ReadonlyMap<string, string>
-  readonly children: ReadonlyMap<string, ChildSession>
+  readonly compactions: ACPCompaction.Tracked
+  readonly children: ReadonlyMap<string, ACPChild.Session>
   readonly openChildren: ReadonlySet<string>
-  /** Forms asked of the client that the server has not yet answered or cancelled. */
-  readonly forms: ReadonlySet<string>
-  readonly finish?: SessionMessageAssistant["finish"]
-  readonly usage?: { readonly turn: TokenUsageInfo; readonly last: TokenUsageInfo }
-  readonly stepError?: SessionStructuredError
+  readonly asks: ReadonlySet<string>
+  readonly finish?: SessionMessage.Assistant["finish"]
+  readonly usage?: { readonly turn: TokenUsage.Info; readonly last: TokenUsage.Info }
+  readonly stepError?: SessionError.Error
   readonly executionError?: { readonly type: string; readonly message: string }
 }
 
-type PermissionEvent = Extract<EventSubscribeOutput, { type: "permission.asked" }>
-type FormEvent = Extract<EventSubscribeOutput, { type: "form.created" }>
+type PermissionEvent = Extract<OpenCodeEvent, { type: "permission.asked" }>
+type FormEvent = Extract<OpenCodeEvent, { type: "form.created" }>
 
 export type Output =
   | { readonly _tag: "SessionUpdate"; readonly update: SessionUpdate }
-  | { readonly _tag: "ChildUpdate"; readonly update: ChildSessionUpdate }
+  | { readonly _tag: "ChildUpdate"; readonly update: ACPChild.Update }
   | {
       readonly _tag: "PermissionAsk"
       readonly event: PermissionEvent
       readonly tool?: Tool
-      readonly child?: ChildSession
+      readonly child?: ACPChild.Session
     }
   | {
       readonly _tag: "FormAsk"
       readonly form: FormEvent["data"]["form"]
-      readonly child?: ChildSession
-      /** Whether the form's session sends its tool calls to the client as `session/update` tool calls. */
+      readonly child?: ACPChild.Session
       readonly toolCallSent: boolean
     }
-  | { readonly _tag: "FormSettled"; readonly formID: string }
+  | { readonly _tag: "AskSettled"; readonly id: string }
 
-export type Step = {
+type Step = {
   readonly state: TurnState
   readonly outputs: ReadonlyArray<Output>
   readonly terminal?: Terminal
 }
 
-type CompactionEvent = Extract<
-  EventSubscribeOutput,
-  { readonly type: "session.compaction.started" | "session.compaction.ended" | "session.compaction.failed" }
->
-
-type CompactionMarker = {
-  readonly status: "started" | "completed" | "failed"
-  readonly messageId: string
-  readonly reason: "auto" | "manual"
-  readonly error?: SessionStructuredError
-}
-
 export const initial: TurnState = {
   started: false,
   tools: new Map(),
@@ -129,10 +86,10 @@ export const initial: TurnState = {
   compactions: new Map(),
   children: new Map(),
   openChildren: new Set(),
-  forms: new Set(),
+  asks: new Set(),
 }
 
-export function step(state: TurnState, event: EventSubscribeOutput, ctx: Context): Step {
+export function step(state: TurnState, event: OpenCodeEvent, ctx: Context): Step {
   if (event.type === "session.created") {
     const parentID = event.data.parentID
     if (!parentID) return { state, outputs: [] }
@@ -158,11 +115,14 @@ export function step(state: TurnState, event: EventSubscribeOutput, ctx: Context
     const tool = event.data.source?.id
       ? state.tools.get(toolKey(event.data.sessionID, event.data.source.id))
       : undefined
-    return { state, outputs: [{ _tag: "PermissionAsk", event, tool, child }] }
+    return {
+      state: { ...state, asks: new Set(state.asks).add(event.data.id) },
+      outputs: [{ _tag: "PermissionAsk", event, tool, child }],
+    }
   }
   if (event.type === "form.created" && (event.data.form.sessionID === ctx.sessionID || child)) {
     return {
-      state: { ...state, forms: new Set(state.forms).add(event.data.form.id) },
+      state: { ...state, asks: new Set(state.asks).add(event.data.form.id) },
       outputs: [
         {
           _tag: "FormAsk",
@@ -173,13 +133,20 @@ export function step(state: TurnState, event: EventSubscribeOutput, ctx: Context
       ],
     }
   }
-  if ((event.type === "form.replied" || event.type === "form.cancelled") && state.forms.has(event.data.id)) {
-    const forms = new Set(state.forms)
-    forms.delete(event.data.id)
-    return { state: { ...state, forms }, outputs: [{ _tag: "FormSettled", formID: event.data.id }] }
+  const settledID =
+    event.type === "permission.replied"
+      ? event.data.requestID
+      : event.type === "form.replied" || event.type === "form.cancelled"
+        ? event.data.id
+        : undefined
+  if (settledID && state.asks.has(settledID)) {
+    const asks = new Set(state.asks)
+    asks.delete(settledID)
+    return { state: { ...state, asks }, outputs: [{ _tag: "AskSettled", id: settledID }] }
   }
   if (!eventSessionID || (eventSessionID !== ctx.sessionID && !child)) return { state, outputs: [] }
-  if (matchesStart(event, ctx.start)) return { state: { ...state, started: true }, outputs: [] }
+  if (event.type === "session.inbox.delivered" && event.data.inboxID === ctx.start.id)
+    return { state: { ...state, started: true }, outputs: [] }
   if (!state.started) return { state, outputs: [] }
 
   switch (event.type) {
@@ -207,11 +174,20 @@ export function step(state: TurnState, event: EventSubscribeOutput, ctx: Context
     case "session.compaction.started":
     case "session.compaction.ended":
     case "session.compaction.failed": {
-      const compacted = compactionMarker(event, state.compactions)
-      return {
-        state: { ...state, compactions: compacted.compactions },
-        outputs: compacted.marker ? send(compactionUpdate(compacted.marker)) : [],
-      }
+      const applied = ACPCompaction.apply(
+        event,
+        state.compactions,
+        ACPCompaction.usesStandardUpdates(ctx, child !== undefined),
+      )
+      return { state: { ...state, compactions: applied.tracked }, outputs: applied.updates.flatMap(send) }
+    }
+    case "session.compaction.delta": {
+      const update = ACPCompaction.chunk(
+        state.compactions.get(eventSessionID),
+        event.data.text,
+        ACPCompaction.usesStandardUpdates(ctx, child !== undefined),
+      )
+      return { state, outputs: update ? send(update) : [] }
     }
     case "session.text.delta":
       return {
@@ -227,7 +203,7 @@ export function step(state: TurnState, event: EventSubscribeOutput, ctx: Context
         state,
         outputs: send({
           sessionUpdate: "agent_thought_chunk",
-          messageId: `${event.data.assistantMessageID}:reasoning:${event.data.ordinal}`,
+          messageId: reasoningMessageID(event.data.assistantMessageID, event.data.ordinal),
           content: { type: "text", text: event.data.delta },
         }),
       }
@@ -345,7 +321,6 @@ export function step(state: TurnState, event: EventSubscribeOutput, ctx: Context
   }
 }
 
-/** The ACP failure a settled turn reports instead of a response, if any. */
 export function failure(state: TurnState) {
   const error = state.stepError ?? state.executionError
   if (error?.type === "provider.auth") return new ACPError.AuthRequiredError()
@@ -373,155 +348,63 @@ export function response(state: TurnState, sessionID: string, terminal: Terminal
     : undefined
   const error = (state.stepError ?? state.executionError)?.type
   const stopReason = resolveStopReason({ terminal, finish: state.finish, error })
-  // Only an interrupt during backoff leaves a retry pending. Interruption clears the projected retry, so report it here.
+  // Interruption clears the projected retry, so a retry pending at interrupt is reported here.
   const retry = state.retries.get(sessionID)
   return { stopReason, ...(usage ? { usage } : {}), _meta: retry ? { [RetryMeta]: retry } : {} }
 }
 
-/** Fails the tools a cancelled turn left open, for when the server's wind-down never reports them. */
-export function abandonTools(state: TurnState, ctx: Context): Step {
+// Child compactions are left to the background consumer.
+export function abandon(state: TurnState, ctx: Context): Step {
+  const compaction = state.compactions.get(ctx.sessionID)
   return {
-    state: { ...state, tools: new Map() },
-    outputs: [...state.tools.values()].flatMap((tool) =>
-      route(ctx, state.children.get(tool.sessionID), {
-        sessionUpdate: "tool_call_update",
-        ...errorToolUpdate({
-          toolCallId: tool.id,
-          toolName: tool.name,
-          input: tool.input,
-          metadata: tool.metadata,
-          content: [],
-          error: "Cancelled",
-          cwd: ctx.cwd,
+    state: { ...state, tools: new Map(), compactions: without(state.compactions, ctx.sessionID) },
+    outputs: [
+      ...[...state.tools.values()].flatMap((tool) =>
+        route(ctx, state.children.get(tool.sessionID), {
+          sessionUpdate: "tool_call_update",
+          ...errorToolUpdate({
+            toolCallId: tool.id,
+            toolName: tool.name,
+            input: tool.input,
+            metadata: tool.metadata,
+            content: [],
+            error: "Cancelled",
+            cwd: ctx.cwd,
+          }),
         }),
-      }),
-    ),
+      ),
+      ...(compaction
+        ? route(ctx, undefined, ACPCompaction.abandon(compaction, ACPCompaction.usesStandardUpdates(ctx, false)))
+        : []),
+    ],
   }
 }
 
-/** Lazy, so a message that fails to translate part way still replays the updates before the failure. */
-export function* replayMessage(message: SessionMessageInfo, cwd: string): Generator<SessionUpdate> {
-  if (message.type === "user") {
-    yield { sessionUpdate: "user_message_chunk", messageId: message.id, content: { type: "text", text: message.text } }
-    const files: ReplayPart[] = (message.files ?? []).map((file) => ({
-      type: "file",
-      url: file.source.type === "uri" ? file.source.uri : `data:${file.mime};base64,${file.data}`,
-      filename: file.name,
-      mime: file.mime,
-    }))
-    for (const chunk of partsToContentChunks(files))
-      yield { sessionUpdate: "user_message_chunk", messageId: message.id, ...chunk }
-    return
-  }
-  // A running compaction has no live turn on this connection to settle it, so replay only settled ones.
-  if (message.type === "compaction" && message.status !== "running") {
-    yield compactionUpdate({
-      status: message.status,
-      messageId: message.id,
-      reason: message.reason,
-      ...(message.status === "failed" ? { error: message.error } : {}),
-    })
-    return
-  }
-  if (message.type !== "assistant") return
-  // Live reasoning ordinals count only reasoning parts, not the mixed content array.
-  let reasoningOrdinal = 0
-  for (const part of message.content) {
-    if (part.type === "text") {
-      yield { sessionUpdate: "agent_message_chunk", messageId: message.id, content: { type: "text", text: part.text } }
-      continue
-    }
-    if (part.type === "reasoning") {
-      yield {
-        sessionUpdate: "agent_thought_chunk",
-        messageId: `${message.id}:reasoning:${reasoningOrdinal++}`,
-        content: { type: "text", text: part.text },
-      }
-      continue
-    }
-    yield {
-      sessionUpdate: "tool_call",
-      ...pendingToolCall({
-        toolCallId: part.id,
-        toolName: part.name,
-        state: { input: part.state.status === "streaming" ? {} : part.state.input },
-        cwd,
-      }),
-    }
-    switch (part.state.status) {
-      case "completed":
-        yield {
-          sessionUpdate: "tool_call_update",
-          ...completedToolUpdate({
-            toolCallId: part.id,
-            toolName: part.name,
-            input: part.state.input,
-            metadata: part.state.metadata,
-            content: part.state.content,
-            cwd,
-          }),
-        }
-        break
-      case "running":
-        yield {
-          sessionUpdate: "tool_call_update",
-          ...runningToolUpdate({ toolCallId: part.id, toolName: part.name, state: { input: part.state.input }, cwd }),
-        }
-        break
-      case "error":
-        yield {
-          sessionUpdate: "tool_call_update",
-          ...errorToolUpdate({
-            toolCallId: part.id,
-            toolName: part.name,
-            input: part.state.input,
-            metadata: part.state.metadata,
-            content: part.state.content,
-            error: part.state.error.message,
-            cwd,
-          }),
-        }
-        break
-      case "streaming":
-        break
-    }
-  }
+export function reasoningMessageID(messageID: string, ordinal: number) {
+  return `${messageID}:reasoning:${ordinal}`
 }
 
 function newTool(sessionID: string, id: string, name = "tool"): Tool {
   return { sessionID, id, name, input: {}, metadata: {} }
 }
 
-function route(ctx: Context, child: ChildSession | undefined, update: SessionUpdate): Output[] {
+function route(ctx: Context, child: ACPChild.Session | undefined, update: SessionUpdate): Output[] {
   if (!child) return ctx.mode === "turn" ? [{ _tag: "SessionUpdate", update }] : []
-  const projected = projectChildUpdate(update, child)
+  const projected = ACPChild.project(update, child)
   if (ctx.childUpdates) return childStatus(ctx, child, { type: "update", update: projected })
   return ctx.mode === "turn" ? [{ _tag: "SessionUpdate", update: projected }] : []
 }
 
-function childStatus(ctx: Context, child: ChildSession, value: ChildSessionEvent): Output[] {
+function childStatus(ctx: Context, child: ACPChild.Session, event: ACPChild.Event): Output[] {
   if (!ctx.childUpdates) return []
-  return [
-    {
-      _tag: "ChildUpdate",
-      update: {
-        rootSessionId: ctx.sessionID,
-        childSessionId: child.id,
-        parentSessionId: child.parentID,
-        depth: child.depth,
-        ...(child.title ? { title: child.title } : {}),
-        ...value,
-      },
-    },
-  ]
+  return [{ _tag: "ChildUpdate", update: ACPChild.update(ctx.sessionID, child, event) }]
 }
 
-// A background consumer ends once its last open child settles.
 function childEnded(
   state: TurnState,
   ctx: Context,
-  child: ChildSession,
-  status: ChildSessionEvent,
+  child: ACPChild.Session,
+  status: ACPChild.Event,
   terminal: Terminal,
 ): Step {
   const openChildren = new Set(state.openChildren)
@@ -533,7 +416,7 @@ function childEnded(
   }
 }
 
-function recordStep(state: TurnState, tokens: TokenUsageInfo): TurnState {
+function recordStep(state: TurnState, tokens: TokenUsage.Info): TurnState {
   const turn = state.usage?.turn
   return {
     ...state,
@@ -557,7 +440,7 @@ function without<K, V>(map: ReadonlyMap<K, V>, key: K) {
   return next
 }
 
-function sessionIDFromEvent(event: EventSubscribeOutput) {
+function sessionIDFromEvent(event: OpenCodeEvent) {
   if ("sessionID" in event.data && typeof event.data.sessionID === "string") return event.data.sessionID
   if (event.type === "form.created") return event.data.form.sessionID
   return undefined
@@ -567,61 +450,9 @@ function toolKey(sessionID: string, id: string) {
   return `${sessionID}:${id}`
 }
 
-// Message IDs follow core's compaction message projection, so live markers match replayed ones.
-function compactionMarker(event: CompactionEvent, compactions: ReadonlyMap<string, string>) {
-  const sessionID = event.data.sessionID
-  if (event.type === "session.compaction.started") {
-    const messageId = event.data.inputID ?? SessionMessage.ID.fromEvent(Event.ID.make(event.id))
-    const marker: CompactionMarker = { status: "started", messageId, reason: event.data.reason }
-    return { marker, compactions: new Map(compactions).set(sessionID, messageId) }
-  }
-  const tracked = compactions.get(sessionID)
-  const remaining = without(compactions, sessionID)
-  if (event.type === "session.compaction.ended") {
-    const marker: CompactionMarker | undefined = tracked
-      ? { status: "completed", messageId: tracked, reason: event.data.reason }
-      : undefined
-    return { marker, compactions: remaining }
-  }
-  // Automatic compaction can fail before it starts, for example when there is nothing to compact yet.
-  const marker: CompactionMarker = {
-    status: "failed",
-    messageId: tracked ?? event.data.inputID ?? SessionMessage.ID.fromEvent(Event.ID.make(event.id)),
-    reason: event.data.reason,
-    error: event.data.error,
-  }
-  return { marker, compactions: remaining }
-}
-
-function compactionUpdate(marker: CompactionMarker): SessionUpdate {
-  return { sessionUpdate: "session_info_update", _meta: { [CompactionMeta]: marker } }
-}
-
-function projectChildUpdate(update: SessionUpdate, child: ChildSession) {
-  const projected = { ...update }
-  projected._meta = {
-    ...projected._meta,
-    "opencode/child-session": {
-      id: child.id,
-      parentID: child.parentID,
-      depth: child.depth,
-      ...(child.title ? { title: child.title } : {}),
-    },
-  }
-  if (projected.sessionUpdate === "tool_call" || projected.sessionUpdate === "tool_call_update") {
-    projected.toolCallId = `${child.id}:${projected.toolCallId}`
-    if (projected.title && child.title) projected.title = `${child.title}: ${projected.title}`
-  }
-  return projected
-}
-
-function matchesStart(event: EventSubscribeOutput, start: TurnStart) {
-  return event.type === "session.inbox.delivered" && event.data.inboxID === start.id
-}
-
 function resolveStopReason(input: {
   readonly terminal: Terminal
-  readonly finish: SessionMessageAssistant["finish"]
+  readonly finish: SessionMessage.Assistant["finish"]
   readonly error?: string
 }): PromptResponse["stopReason"] {
   if (input.terminal === "interrupted" || input.error === "aborted") return "cancelled"

packages/cli/src/acp/turn.ts

@@ -1,10 +1,6 @@
 import type { CancelNotification, PromptRequest, PromptResponse, RequestError } from "@agentclientprotocol/sdk"
-import {
-  isSessionNotFoundError,
-  type CommandInfo,
-  type OpenCodeClient,
-  type OpenCodeEvent,
-} from "@opencode/client/promise"
+import type { OpenCodeClient, OpenCodeEvent } from "@opencode/client/effect"
+import type { Command } from "@opencode/schema/command"
 import { SessionMessage } from "@opencode/schema/session-message"
 import { TokenUsage } from "@opencode/schema/token-usage"
 import {
@@ -24,38 +20,27 @@ import {
 } from "effect"
 import { access, constants } from "node:fs/promises"
 import { fileURLToPath } from "node:url"
+import type { Capabilities } from "./capabilities"
 import { builtinCommands, type ACPCatalog, type Catalog } from "./catalog"
+import { ACPChild } from "./child"
+import { ACPClient } from "./client"
 import { currentModel } from "./config-option"
 import type { ACPConnection } from "./connection"
 import { linkReference, promptContentToParts, type PromptPart } from "./content"
 import { ACPElicitation } from "./elicitation"
 import { ACPError } from "./error"
 import { ACPPermission } from "./permission"
-import { ACPPromise } from "./promise"
-import type { ACPService } from "./service"
 import type { ACPSessions, Attached } from "./sessions"
 import { ACPTranslate } from "./translate"
 
-type Failure = ACPError.Error | RequestError | ACPCatalog.Error
-
 export interface Interface {
-  /**
-   * Runs the session's only turn. Cancelling it, including through the request's `$/cancel_request` signal,
-   * interrupts the turn and still resolves with `stopReason: "cancelled"`.
-   */
-  readonly prompt: (input: PromptRequest, signal: AbortSignal) => Effect.Effect<PromptResponse, Failure>
-  /** Interrupts the session's active turn and waits for it to settle. No-op when the session is idle. */
+  readonly prompt: (input: PromptRequest, signal: AbortSignal) => Effect.Effect<PromptResponse, ACPError.Failure>
   readonly cancel: (input: CancelNotification) => Effect.Effect<void>
-  /** Like `cancel`, but an idle session is still interrupted, since server work can outlive its turn. */
+  /** Unlike `cancel`, interrupts an idle session too, since server work can outlive its turn. */
   readonly close: (sessionID: string) => Effect.Effect<void, ACPError.Error | RequestError>
 }
 
-export class Service extends Context.Service<Service, Interface>()("@opencode/cli/acp/Turn") {}
-
-/**
- * How long a cancelled turn keeps forwarding the server's wind-down. Core acknowledges an interrupt before its
- * cleanup settles, and its shell tool waits 3 seconds before escalating to SIGKILL.
- */
+/** Core acknowledges an interrupt before its cleanup settles, and its shell tool waits 3s before SIGKILL. */
 export const CancelDrainTimeout = Context.Reference<Duration.Input>("@opencode/cli/acp/Turn/CancelDrainTimeout", {
   defaultValue: () => "5 seconds",
 })
@@ -66,21 +51,18 @@ type PreparedPrompt = {
   readonly files: Array<{ readonly uri: string; readonly name?: string }>
   readonly synthetic: ReadonlyArray<string>
   readonly slash?: { readonly name: string; readonly args: string }
-  readonly command?: CommandInfo
+  readonly command?: Command.Info
 }
 
 type PermissionAsk = Extract<ACPTranslate.Output, { readonly _tag: "PermissionAsk" }>
 
-/** A turn's event feed. It moves to the session scope when the turn ends with children still running. */
 type Subscription = {
   readonly scope: Scope.Closeable
   readonly events: Queue.Dequeue<OpenCodeEvent, unknown>
-  /** Runs permission and form asks one at a time in ask order, without holding back the rest of the stream. */
+  /** Asks run serially off the event stream. */
   readonly asks: Queue.Queue<Effect.Effect<void, ACPError.Error | RequestError>>
-  /** Completed when the turn is cancelled; pending and later asks then resolve without the client. */
   readonly cancelled: Deferred.Deferred<void>
-  /** Completed per asked form once the server reports it answered or cancelled. */
-  readonly forms: Map<string, Deferred.Deferred<void>>
+  readonly settled: Map<string, Deferred.Deferred<void>>
 }
 
 export const make = Effect.fnUntraced(function* (input: {
@@ -88,24 +70,23 @@ export const make = Effect.fnUntraced(function* (input: {
   readonly connection: ACPConnection.Interface
   readonly sessions: ACPSessions.Interface
   readonly catalog: ACPCatalog.Interface
-  readonly capabilities: Ref.Ref<ACPService.Capabilities>
+  readonly capabilities: Ref.Ref<Capabilities>
 }) {
   const scope = yield* Effect.scope
   const drainTimeout = yield* CancelDrainTimeout
-  const turns = yield* FiberMap.make<string, PromptResponse, Failure>()
+  const turns = yield* FiberMap.make<string, PromptResponse, ACPError.Failure>()
 
   const subscribe = Effect.fnUntraced(function* () {
-    // Parented, so it still closes when the session scope it is handed to is already gone.
+    // Parented to the service scope; the session scope may already be closed.
     const subscriptionScope = yield* Scope.fork(scope)
     const subscription: Subscription = {
       scope: subscriptionScope,
-      events: yield* Stream.fromAsyncIterable(input.client.event.subscribe(), (cause) => cause).pipe(
-        Stream.toQueue({ capacity: "unbounded" }),
-        Scope.provide(subscriptionScope),
-      ),
+      events: yield* input.client.event
+        .subscribe()
+        .pipe(Stream.toQueue({ capacity: "unbounded" }), Scope.provide(subscriptionScope)),
       asks: yield* Queue.unbounded<Effect.Effect<void, ACPError.Error | RequestError>>(),
       cancelled: yield* Deferred.make<void>(),
-      forms: new Map(),
+      settled: new Map(),
     }
     yield* Queue.take(subscription.asks).pipe(
       Effect.flatten,
@@ -121,18 +102,22 @@ export const make = Effect.fnUntraced(function* (input: {
   const take = (subscription: Subscription) =>
     Queue.take(subscription.events).pipe(
       Effect.catch((error) =>
-        Cause.isDone(error) ? Effect.fail(new ACPError.ServerUnavailableError()) : ACPPromise.classify(error),
+        Cause.isDone(error) ? Effect.fail(new ACPError.ServerUnavailableError()) : ACPClient.classify(error),
       ),
     )
 
-  // A turn settles only after the asks it saw have been resolved.
   const asksSettled = Effect.fnUntraced(function* (subscription: Subscription) {
     const settled = yield* Deferred.make<void>()
     yield* Queue.offer(subscription.asks, Deferred.succeed(settled, undefined).pipe(Effect.asVoid))
     yield* Deferred.await(settled)
   })
 
-  const reply = (subscription: Subscription, ctx: ACPTranslate.Context, ask: PermissionAsk) =>
+  const reply = (
+    subscription: Subscription,
+    ctx: ACPTranslate.Context,
+    ask: PermissionAsk,
+    settled: Deferred.Deferred<void>,
+  ) =>
     ACPPermission.reply(
       {
         client: input.client,
@@ -142,7 +127,8 @@ export const make = Effect.fnUntraced(function* (input: {
         clientSessionID: ctx.sessionID,
         cwd: ctx.cwd,
         tool: ask.tool,
-        ...(ask.child ? { toolCallPrefix: ask.child.id, titlePrefix: ask.child.title } : {}),
+        child: ask.child,
+        settled: Deferred.await(settled),
       },
       Deferred.await(subscription.cancelled),
     )
@@ -153,17 +139,27 @@ export const make = Effect.fnUntraced(function* (input: {
         return input.connection.sessionUpdate({ sessionId: ctx.sessionID, update: output.update })
       case "ChildUpdate":
         return input.connection
-          .extNotification(ACPTranslate.ChildSessionUpdateMethod, output.update)
-          .pipe(Effect.ignoreCause)
+          .extNotification(ACPChild.UpdateMethod, output.update)
+          .pipe(
+            Effect.catchCause((cause) =>
+              Cause.hasInterruptsOnly(cause)
+                ? Effect.void
+                : Effect.logWarning("ACP child session update failed", cause),
+            ),
+          )
       case "PermissionAsk":
-        return Queue.offer(subscription.asks, reply(subscription, ctx, output)).pipe(Effect.asVoid)
+        return Effect.gen(function* () {
+          const settled = yield* Deferred.make<void>()
+          subscription.settled.set(output.event.data.id, settled)
+          yield* Queue.offer(subscription.asks, reply(subscription, ctx, output, settled))
+        })
       case "FormAsk":
         return Effect.gen(function* () {
           const capabilities = yield* Ref.get(input.capabilities)
           const requestedSchema = ACPElicitation.requestedSchema(output.form, capabilities)
-          if (!requestedSchema) return yield* ACPElicitation.cancel(input.client, output.form)
+          if (!requestedSchema) return yield* ACPElicitation.cancelUnshown(input.client, output.form)
           const settled = yield* Deferred.make<void>()
-          subscription.forms.set(output.form.id, settled)
+          subscription.settled.set(output.form.id, settled)
           yield* Queue.offer(
             subscription.asks,
             ACPElicitation.reply(
@@ -181,10 +177,10 @@ export const make = Effect.fnUntraced(function* (input: {
             ),
           )
         })
-      case "FormSettled":
+      case "AskSettled":
         return Effect.suspend(() => {
-          const settled = subscription.forms.get(output.formID)
-          subscription.forms.delete(output.formID)
+          const settled = subscription.settled.get(output.id)
+          subscription.settled.delete(output.id)
           return settled ? Deferred.succeed(settled, undefined) : Effect.void
         })
     }
@@ -197,8 +193,10 @@ export const make = Effect.fnUntraced(function* (input: {
   ) {
     while (true) {
       const event = yield* take(subscription)
-      const next = ACPTranslate.step(yield* Ref.get(state), event, ctx)
-      yield* Ref.set(state, next.state)
+      const next = yield* Ref.modify(state, (current) => {
+        const step = ACPTranslate.step(current, event, ctx)
+        return [step, step.state]
+      })
       yield* Effect.forEach(next.outputs, (output) => interpret(subscription, ctx, output), { discard: true })
       if (next.terminal) {
         yield* asksSettled(subscription)
@@ -210,60 +208,56 @@ export const make = Effect.fnUntraced(function* (input: {
   const submit = Effect.fnUntraced(function* (attached: Attached, prompt: PreparedPrompt) {
     const sessionID = attached.id
     if (prompt.synthetic.length > 0) {
-      yield* ACPPromise.promise((signal) =>
-        input.client.session.synthetic(
-          {
-            sessionID,
-            text: prompt.synthetic.join("\n\n"),
-            description: "ACP embedded context",
-            delivery: "steer",
-            resume: false,
-          },
-          { signal },
-        ),
-      )
+      yield* input.client.session
+        .synthetic({
+          sessionID,
+          text: prompt.synthetic.join("\n\n"),
+          description: "ACP embedded context",
+          delivery: "steer",
+          resume: false,
+        })
+        .pipe(Effect.catch(ACPClient.classify))
     }
     if (prompt.start.type === "compaction") {
-      yield* ACPPromise.promise((signal) =>
-        input.client.session.compact({ sessionID, id: prompt.start.id }, { signal }),
-      )
+      yield* input.client.session.compact({ sessionID, id: prompt.start.id }).pipe(Effect.catch(ACPClient.classify))
       return
     }
     const command = prompt.command
     if (command) {
-      yield* ACPPromise.promise((signal) =>
-        input.client.session.command(
-          { sessionID, name: command.name, text: prompt.slash?.args ?? "", files: prompt.files, delivery: "steer" },
-          { signal },
-        ),
-      )
+      yield* input.client.session
+        .command({
+          sessionID,
+          name: command.name,
+          text: prompt.slash?.args ?? "",
+          files: prompt.files,
+          delivery: "steer",
+        })
+        .pipe(Effect.catch(ACPClient.classify))
       return
     }
-    yield* ACPPromise.promise((signal) =>
-      input.client.session.prompt(
-        { sessionID, id: prompt.start.id, text: prompt.text, files: prompt.files, delivery: "steer" },
-        { signal },
-      ),
-    )
+    yield* input.client.session
+      .prompt({ sessionID, id: prompt.start.id, text: prompt.text, files: prompt.files, delivery: "steer" })
+      .pipe(Effect.catch(ACPClient.classify))
   })
 
-  const interruptServer = (sessionID: string) =>
-    ACPPromise.promise(() => input.client.session.interrupt({ sessionID })).pipe(Effect.ignoreCause)
-
-  // Rejects pending asks, interrupts the server once, then forwards its wind-down until the terminal event or the
-  // timeout. Tools still open at the timeout are reported failed so the client never shows them running.
   const windDown = Effect.fnUntraced(function* (
     subscription: Subscription,
     ctx: ACPTranslate.Context,
     state: Ref.Ref<ACPTranslate.TurnState>,
-    events: Fiber.Fiber<ACPTranslate.Terminal, Failure>,
+    events: Fiber.Fiber<ACPTranslate.Terminal, ACPError.Failure>,
   ) {
     yield* Deferred.succeed(subscription.cancelled, undefined)
-    yield* interruptServer(ctx.sessionID)
+    yield* input.client.session
+      .interrupt({ sessionID: ctx.sessionID })
+      .pipe(
+        Effect.catchCause((cause) =>
+          Cause.hasInterruptsOnly(cause) ? Effect.void : Effect.logWarning("ACP server interrupt failed", cause),
+        ),
+      )
     if (!(yield* Ref.get(state)).started) return
-    if (Option.isSome(yield* Fiber.await(events).pipe(Effect.timeoutOption(drainTimeout)))) return
+    if (Option.exists(yield* Fiber.await(events).pipe(Effect.timeoutOption(drainTimeout)), Exit.isSuccess)) return
     yield* Fiber.interrupt(events)
-    const abandoned = ACPTranslate.abandonTools(yield* Ref.get(state), ctx)
+    const abandoned = ACPTranslate.abandon(yield* Ref.get(state), ctx)
     yield* Ref.set(state, abandoned.state)
     yield* Effect.forEach(abandoned.outputs, (output) => interpret(subscription, ctx, output), { discard: true }).pipe(
       Effect.ignore,
@@ -299,12 +293,12 @@ export const make = Effect.fnUntraced(function* (input: {
     subscription: Subscription,
     ctx: ACPTranslate.Context,
     state: Ref.Ref<ACPTranslate.TurnState>,
-    exit: Exit.Exit<ACPTranslate.Terminal, Failure>,
+    exit: Exit.Exit<ACPTranslate.Terminal, ACPError.Failure>,
   ) {
     const close = Scope.close(subscription.scope, Exit.void)
     if (Exit.isFailure(exit) && !Cause.hasInterruptsOnly(exit.cause)) return yield* close
     if ((yield* Ref.get(state)).openChildren.size === 0) return yield* close
-    // Children that outlive a cancelled turn were not cancelled, so their asks still go to the client.
+    // Children outlive a cancelled turn, so their asks still reach the client.
     const cancelled = yield* Deferred.make<void>()
     const background = consume({ ...subscription, cancelled }, { ...ctx, mode: "background" }, state).pipe(
       Effect.ignore,
@@ -317,7 +311,7 @@ export const make = Effect.fnUntraced(function* (input: {
   const settle = Effect.fnUntraced(function* (
     attached: Attached,
     state: Ref.Ref<ACPTranslate.TurnState>,
-    exit: Exit.Exit<ACPTranslate.Terminal, Failure>,
+    exit: Exit.Exit<ACPTranslate.Terminal, ACPError.Failure>,
   ) {
     if (Exit.isFailure(exit) && !Cause.hasInterrupts(exit.cause)) return yield* Effect.failCause(exit.cause)
     const current = yield* Ref.get(state)
@@ -335,9 +329,7 @@ export const make = Effect.fnUntraced(function* (input: {
       const current = currentModel(catalog, yield* Ref.get(attached.selection))
       const model = catalog.models.find((item) => item.providerID === current.providerID && item.id === current.id)
       if (!model?.limit.context) return
-      const info = yield* ACPPromise.promise((signal) =>
-        input.client.session.get({ sessionID: attached.id }, { signal }),
-      )
+      const info = yield* input.client.session.get({ sessionID: attached.id }).pipe(Effect.catch(ACPClient.classify))
       yield* input.connection.sessionUpdate({
         sessionId: attached.id,
         update: {
@@ -348,37 +340,39 @@ export const make = Effect.fnUntraced(function* (input: {
         },
       })
     },
-    (effect) => Effect.ignoreCause(effect),
+    Effect.catchCause((cause) =>
+      Cause.hasInterruptsOnly(cause) ? Effect.void : Effect.logWarning("ACP usage update failed", cause),
+    ),
   )
 
   // Forked uninterruptible: interruption reaches only `execute`, so the fiber still settles with a response.
-  const run = Effect.fn("cli.acp.turn.run")(function* (
-    attached: Attached,
-    prompt: PreparedPrompt,
-    childUpdates: boolean,
-  ) {
+  const run = Effect.fn("cli.acp.turn.run")(function* (attached: Attached, prompt: PreparedPrompt) {
+    const capabilities = yield* Ref.get(input.capabilities)
     const state = yield* Ref.make(ACPTranslate.initial)
     const ctx: ACPTranslate.Context = {
       sessionID: attached.id,
       cwd: attached.cwd,
       start: prompt.start,
-      childUpdates,
+      childUpdates: capabilities.childSessionUpdates,
+      compaction: capabilities.compaction,
       mode: "turn",
     }
     const exit = yield* Effect.exit(Effect.interruptible(execute(attached, prompt, ctx, state)))
     return yield* settle(attached, state, exit)
   })
 
-  return Service.of({
-    prompt: Effect.fn("cli.acp.turn.prompt")(function* (params, signal) {
+  return {
+    prompt: Effect.fnUntraced(function* (params, signal) {
       const attached = yield* input.sessions.require(params.sessionId)
       const catalog = yield* input.catalog.get(attached.cwd)
-      const childUpdates = (yield* Ref.get(input.capabilities)).childSessionUpdates
+      if (params.prompt.some((block) => block.type === "image" && !block.data && !block.uri)) {
+        return yield* new ACPError.InvalidRequestError({ message: "image content has no data or uri", field: "prompt" })
+      }
       const parts = yield* Effect.forEach(promptContentToParts(params.prompt), referenceUnreadableFile, {
         concurrency: "unbounded",
       })
       const prompt = preparePrompt(catalog, parts, SessionMessage.ID.create())
-      // Check and register in one synchronous step.
+      // Synchronous, so concurrent prompts for one session cannot both register.
       const turn = yield* Effect.withFiber((fiber) => {
         if (FiberMap.hasUnsafe(turns, attached.id)) {
           return Effect.fail(
@@ -388,7 +382,7 @@ export const make = Effect.fnUntraced(function* (input: {
             }),
           )
         }
-        const forked = Effect.runForkWith(fiber.context)(run(attached, prompt, childUpdates), { uninterruptible: true })
+        const forked = Effect.runForkWith(fiber.context)(run(attached, prompt), { uninterruptible: true })
         FiberMap.setUnsafe(turns, attached.id, forked)
         return Effect.succeed(forked)
       })
@@ -396,18 +390,18 @@ export const make = Effect.fnUntraced(function* (input: {
       yield* aborted(signal).pipe(Effect.andThen(Fiber.interrupt(turn)), Effect.forkChild)
       return yield* Fiber.join(turn)
     }),
-    cancel: Effect.fn("cli.acp.turn.cancel")(function* (params) {
+    cancel: Effect.fnUntraced(function* (params) {
       yield* FiberMap.remove(turns, params.sessionId)
     }),
     close: Effect.fn("cli.acp.turn.close")(function* (sessionID) {
       if (FiberMap.hasUnsafe(turns, sessionID)) return yield* FiberMap.remove(turns, sessionID)
-      yield* ACPPromise.promise(() =>
-        input.client.session.interrupt({ sessionID }).catch((error) => {
-          if (!isSessionNotFoundError(error)) throw error
-        }),
+      yield* ACPClient.decodeSessionID(sessionID).pipe(
+        Effect.flatMap((id) => input.client.session.interrupt({ sessionID: id })),
+        Effect.catchTag(["ACPInvalidRequestError", "SessionNotFoundError"], () => Effect.void),
+        Effect.catch(ACPClient.classify),
       )
     }),
-  })
+  } satisfies Interface
 })
 
 function aborted(signal: AbortSignal) {
@@ -419,18 +413,26 @@ function aborted(signal: AbortSignal) {
   })
 }
 
-function preparePrompt(catalog: Catalog, parts: readonly PromptPart[], messageID: string): PreparedPrompt {
+function preparePrompt(catalog: Catalog, parts: readonly PromptPart[], messageID: SessionMessage.ID): PreparedPrompt {
   const visible = parts.filter((part) => part.type !== "text" || (!part.synthetic && !part.ignored))
   const synthetic = parts.flatMap((part) => (part.type === "text" && part.synthetic ? [part.text] : []))
   const text = visible.flatMap((part) => (part.type === "text" ? [part.text] : [])).join("\n")
   const files = visible.flatMap((part) => (part.type === "file" ? [{ uri: part.url, name: part.filename }] : []))
   const slash = detectSlashCommand(text)
   const command = slash ? catalog.commands.find((item) => item.name === slash.name) : undefined
-  const start = turnStart(messageID, slash)
-  return { start, text, files, synthetic, slash, command }
+  return {
+    start:
+      slash && builtinCommands.get(slash.name)?.start === "compaction"
+        ? { type: "compaction", id: messageID }
+        : { type: "input", id: messageID },
+    text,
+    files,
+    synthetic,
+    slash,
+    command,
+  }
 }
 
-// Covers only missing or permission-denied targets; the server still rejects oversized, non-regular, or unlistable ones.
 function referenceUnreadableFile(part: PromptPart) {
   if (part.type !== "file" || !part.url.startsWith("file://")) return Effect.succeed(part)
   return Effect.tryPromise(() => access(fileURLToPath(part.url), constants.R_OK)).pipe(
@@ -439,12 +441,7 @@ function referenceUnreadableFile(part: PromptPart) {
   )
 }
 
-function turnStart(messageID: string, slash: PreparedPrompt["slash"]): ACPTranslate.TurnStart {
-  if (slash && builtinCommands.get(slash.name)?.start === "compaction") return { type: "compaction", id: messageID }
-  return { type: "input", id: messageID }
-}
-
-function detectSlashCommand(text: string): { readonly name: string; readonly args: string } | undefined {
+function detectSlashCommand(text: string) {
   const value = text.trim()
   if (!value.startsWith("/")) return undefined
   const [name, ...rest] = value.slice(1).split(/\s+/)

packages/cli/src/commands/handlers/acp.ts

@@ -1,8 +1,9 @@
 import { MessageTooLargeError, ndJsonStream } from "@agentclientprotocol/sdk"
-import { OpenCode } from "@opencode/client/promise"
+import { OpenCode } from "@opencode/client/effect"
 import { Service } from "@opencode/client/effect/service"
 import { CrossSpawnSpawner } from "@opencode/util/cross-spawn-spawner"
 import { Effect } from "effect"
+import { FetchHttpClient, HttpClient, HttpClientRequest } from "effect/unstable/http"
 import { Writable } from "node:stream"
 import { ACP } from "../../acp/agent"
 import { Commands } from "../commands"
@@ -14,7 +15,15 @@ export default Runtime.handler(
   Effect.fn("cli.acp")(function* () {
     process.env.OPENCODE_CLIENT = "acp"
     const endpoint = yield* Standalone.start()
-    const client = OpenCode.make({ baseUrl: endpoint.url, headers: Service.headers(endpoint) })
+    const client = yield* OpenCode.make({ baseUrl: endpoint.url }).pipe(
+      Effect.provideServiceEffect(
+        HttpClient.HttpClient,
+        HttpClient.HttpClient.pipe(
+          Effect.map(HttpClient.mapRequest(HttpClientRequest.setHeaders(Service.headers(endpoint) ?? {}))),
+        ),
+      ),
+      Effect.provide(FetchHttpClient.layer),
+    )
     const connection = yield* ACP.connect(client, ndJsonStream(Writable.toWeb(process.stdout), Bun.stdin.stream()))
     const failure = yield* Effect.raceFirst(
       Effect.promise(() => connection.closed).pipe(
@@ -33,10 +42,8 @@ export default Runtime.handler(
         Effect.map((reason) => `server exited unexpectedly (${reason})`),
       ),
     )
-    // Closing the handler scope would wait for the private server's graceful shutdown; its lease pipe already
-    // ends the server once this process exits.
+    // Exit directly: closing the scope would wait on the server's graceful shutdown, and its lease pipe ends it anyway.
     yield* Effect.sync(() => {
-      // stdout carries ACP, so the diagnostic goes to stderr.
       if (failure) process.stderr.write(`opencode acp: ${failure}\n`)
       process.exit(failure ? 1 : 0)
     })

packages/cli/src/commands/handlers/upgrade.ts

@@ -20,7 +20,7 @@ export default Runtime.handler(
         )
 
       log.info(`Using method: ${method}`)
-      const target = Option.getOrUndefined(input.target) ?? (yield* updater.latest())
+      const target = Option.getOrUndefined(input.target) ?? (yield* updater.latest(method))
       const version = target.trim().replace(/^v/, "")
       if (version === OPENCODE_VERSION) {
         log.warn(`OpenCode upgrade skipped: ${version} is already installed`)

packages/cli/src/services/updater.ts

@@ -98,7 +98,7 @@ export interface Interface {
   readonly check: () => Effect.Effect<CheckResult | undefined, Error>
   readonly apply: (version: string) => Effect.Effect<void, Error>
   readonly method: () => Effect.Effect<Method | undefined>
-  readonly latest: () => Effect.Effect<string, Error>
+  readonly latest: (method?: Method) => Effect.Effect<string, Error>
   readonly upgrade: (method: Method, version: string) => Effect.Effect<void, Error>
   readonly removal: (
     method: Method,
@@ -131,8 +131,8 @@ const make = Effect.gen(function* () {
   const flock = yield* EffectFlock.Service
   const installedVersion = yield* Ref.make(OPENCODE_VERSION)
   const channel = OPENCODE_CHANNEL.replace(/[^a-zA-Z0-9._-]/g, "-")
+  const executable = yield* fs.realPath(process.execPath).pipe(Effect.orElseSucceed(() => process.execPath))
   const installedPackage = yield* Effect.gen(function* () {
-    const executable = yield* fs.realPath(process.execPath)
     const directory = path.dirname(path.dirname(executable))
     const manifest: { name: string; bin?: Record<string, string> } = yield* fs
       .readFileString(path.join(directory, "package.json"))
@@ -142,6 +142,10 @@ const make = Effect.gen(function* () {
     if (Object.values(manifest.bin ?? {}).some((bin) => path.resolve(directory, bin) === executable))
       return manifest.name
   }).pipe(Effect.orElseSucceed(() => undefined))
+  // "opencode" is Homebrew Core's formula; the others are published to anomalyco/tap.
+  const installedFormula = ["opencode", "opencode-beta", "opencode-v2"].find((name) =>
+    executable.includes(`${path.sep}Cellar${path.sep}${name}${path.sep}`),
+  )
 
   const readPolicy = Effect.fnUntraced(function* () {
     const values = yield* Effect.forEach(["config.json", "opencode.json", "opencode.jsonc"], (name) =>
@@ -178,13 +182,7 @@ const make = Effect.gen(function* () {
 
   const method = Effect.fnUntraced(function* () {
     if (path.resolve(process.execPath) === curlBinary) return "curl"
-    const executable = yield* fs.realPath(process.execPath).pipe(Effect.orElseSucceed(() => process.execPath))
-    if (
-      ["opencode-beta", "opencode-v2"].some((name) =>
-        executable.includes(`${path.sep}Cellar${path.sep}${name}${path.sep}`),
-      )
-    )
-      return "brew"
+    if (installedFormula) return "brew"
     if (!installedPackage) return
 
     const checks: ReadonlyArray<{ method: Method; command: string[] }> = [
@@ -236,10 +234,14 @@ const make = Effect.gen(function* () {
 
   const release = Effect.fnUntraced(function* (method?: Method) {
     const distribution = method === "brew" ? "homebrew" : "npm"
+    // Homebrew Core builds its formula on its own schedule, so the tap release does not describe it.
+    const core = method === "brew" && installedFormula === "opencode"
     const response = yield* Effect.tryPromise({
       try: (signal) =>
         fetch(
-          `https://opencode.ai/update/api/${encodeURIComponent(channel)}/${encodeURIComponent(OPENCODE_ARTIFACT)}/${distribution}?current=${encodeURIComponent(OPENCODE_VERSION)}`,
+          core
+            ? "https://formulae.brew.sh/api/formula/opencode.json"
+            : `https://opencode.ai/update/api/${encodeURIComponent(channel)}/${encodeURIComponent(OPENCODE_ARTIFACT)}/${distribution}?current=${encodeURIComponent(OPENCODE_VERSION)}`,
           {
             signal: AbortSignal.any([signal, AbortSignal.timeout(10_000)]),
           },
@@ -262,19 +264,22 @@ const make = Effect.gen(function* () {
           retry: "Try again in a few minutes.",
         }),
       )
-    const data: { version: string; metadata?: { package?: string } } = yield* Effect.tryPromise({
-      try: () => response.json(),
-      catch: (cause) =>
-        new UpgradeError(
-          {
-            title: "Could not read the OpenCode update information",
-            detail: errorDetail(cause),
-            retry: "Try again in a few minutes.",
-          },
-          { cause },
-        ),
-    })
-    if (!data.metadata?.package)
+    const data: { version?: string; metadata?: { package?: string }; versions?: { stable?: string } } =
+      yield* Effect.tryPromise({
+        try: () => response.json(),
+        catch: (cause) =>
+          new UpgradeError(
+            {
+              title: "Could not read the OpenCode update information",
+              detail: errorDetail(cause),
+              retry: "Try again in a few minutes.",
+            },
+            { cause },
+          ),
+      })
+    const version = core ? data.versions?.stable : data.version
+    const packageName = core ? "opencode" : data.metadata?.package
+    if (!version || !packageName)
       return yield* Effect.fail(
         new UpgradeError({
           title: "Could not read the OpenCode update information",
@@ -282,11 +287,11 @@ const make = Effect.gen(function* () {
           retry: "Try again in a few minutes.",
         }),
       )
-    return { package: data.metadata.package, version: data.version }
+    return { package: packageName, version }
   })
 
-  const latest = () =>
-    method().pipe(
+  const latest = (selected?: Method) =>
+    (selected ? Effect.succeed(selected) : method()).pipe(
       Effect.flatMap(release),
       Effect.map((data) => data.version),
     )
@@ -346,7 +351,8 @@ const make = Effect.gen(function* () {
   const upgrade = Effect.fnUntraced(function* (method: Method, input: string) {
     if (!parseReleaseVersion(input)) return yield* Effect.fail(new Error(`Invalid version: ${input}`))
     const version = input.trim().replace(/^v/, "")
-    const packageName = (yield* release(method)).package
+    const packageName =
+      method === "brew" && installedFormula === "opencode" ? "opencode" : (yield* release(method)).package
     const target = `${packageName}@${version}`
     if (installedPackage && packageName !== installedPackage && (method === "pnpm" || method === "yarn")) {
       return yield* Effect.fail(new Error(`Reinstall ${target} with ${method} to migrate from ${installedPackage}.`))

packages/cli/test/acp/additional-directories.subprocess.test.ts

@@ -2,30 +2,16 @@ import type { NewSessionResponse, PromptResponse } from "@agentclientprotocol/sd
 import { describe, expect, test } from "bun:test"
 import fs from "node:fs/promises"
 import path from "node:path"
-import { createAcpFixture, expectOk, initialize } from "./subprocess"
+import { createAcpFixture, expectOk, initialize, toolCallStream } from "./subprocess"
 
 // The first completion reads the file outside cwd; the follow-up completion ends the turn.
 function readingModel(file: () => string) {
   return (request: unknown) => {
     if (JSON.stringify(request).includes('"role":"tool"')) return "done"
-    return new Response(toolCall(file()), { headers: { "content-type": "text/event-stream" } })
+    return toolCallStream("call_read", "read", { path: file() })
   }
 }
 
-function toolCall(file: string) {
-  const call = { index: 0, id: "call_read", type: "function", function: { name: "read", arguments: "" } }
-  const chunks = [
-    { choices: [{ delta: { role: "assistant", tool_calls: [call] }, finish_reason: null }], usage: null },
-    {
-      choices: [{ delta: { tool_calls: [{ index: 0, function: { arguments: JSON.stringify({ path: file }) } }] } }],
-      usage: null,
-    },
-    { choices: [{ delta: {}, finish_reason: "tool_calls" }], usage: null },
-    { choices: [], usage: { prompt_tokens: 10, completion_tokens: 1, total_tokens: 11 } },
-  ]
-  return `${chunks.map((chunk) => `data: ${JSON.stringify(chunk)}\n\n`).join("")}data: [DONE]\n\n`
-}
-
 describe("acp additional directories subprocess", () => {
   test("tools read files in an additional directory without an external directory ask", async () => {
     const target = { file: "" }

packages/cli/test/acp/additional-directories.test.ts

@@ -1,13 +1,11 @@
 import { describe, expect, test } from "bun:test"
-import fs from "node:fs/promises"
 import path from "node:path"
-import type { PermissionRule } from "@opencode/client/promise"
-import { tmpdir } from "../fixture/tmpdir"
+import type { Permission } from "@opencode/schema/permission"
 import { makeSession, rpcError, startWire, type Wire } from "./wire-fixture"
 
 const key = "opencode.acp.additionalDirectories"
 
-const grant = (directory: string): PermissionRule => ({
+const grant = (directory: string): Permission.Rule => ({
   action: "external_directory",
   resource: path.join(directory, "*"),
   effect: "allow",
@@ -17,9 +15,9 @@ const sharedLib = path.resolve("/shared/lib")
 const productDocs = path.resolve("/product-docs")
 const old = path.resolve("/old")
 
-const userGrant: PermissionRule = { action: "external_directory", resource: "/x/**", effect: "allow" }
+const userGrant: Permission.Rule = { action: "external_directory", resource: "/x/**", effect: "allow" }
 
-const other: PermissionRule[] = [
+const other: Permission.Rule[] = [
   { action: "read", resource: "*.secret", effect: "deny" },
   { action: "external_directory", resource: "/shared/lib/private/*", effect: "deny" },
 ]
@@ -28,56 +26,6 @@ const updates = (acp: Wire) =>
   acp.server.requests.filter((request) => request.method === "PATCH" && request.path.startsWith("/api/session/"))
 
 describe("acp additional directories over the wire", () => {
-  test("session/new grants normalized unique directories other than cwd and lists them", async () => {
-    await using acp = await startWire()
-    await acp.initialize()
-
-    const created = await acp.request("session/new", {
-      cwd: "/workspace",
-      additionalDirectories: ["/shared/lib/", "/workspace", "/docs/../product-docs", "/shared/lib", "/workspace/"],
-      mcpServers: [],
-    })
-
-    expect(acp.server.sessions.get(created.sessionId)).toMatchObject({
-      permissions: [grant(sharedLib), grant(productDocs)],
-      metadata: { [key]: [sharedLib, productDocs] },
-    })
-    expect((await acp.request("session/list", { cwd: "/workspace" })).sessions).toEqual([
-      expect.objectContaining({
-        sessionId: created.sessionId,
-        additionalDirectories: [sharedLib, productDocs],
-      }),
-    ])
-  })
-
-  test("grants both the written and real spelling of a symlinked root and drops links to cwd", async () => {
-    await using tmp = await tmpdir()
-    const root = await fs.realpath(tmp.path)
-    const cwd = path.join(root, "workspace")
-    const shared = path.join(root, "shared")
-    await Promise.all([fs.mkdir(cwd), fs.mkdir(shared)])
-    await Promise.all([
-      fs.symlink(shared, path.join(root, "shared-link")),
-      fs.symlink(cwd, path.join(root, "workspace-link")),
-    ])
-    await using acp = await startWire()
-    await acp.initialize()
-
-    const created = await acp.request("session/new", {
-      cwd,
-      additionalDirectories: [path.join(root, "workspace-link"), path.join(root, "shared-link")],
-      mcpServers: [],
-    })
-
-    expect(acp.server.sessions.get(created.sessionId)).toMatchObject({
-      permissions: [grant(path.join(root, "shared-link")), grant(shared)],
-      metadata: { [key]: [path.join(root, "shared-link")] },
-    })
-    expect((await acp.request("session/list", { cwd })).sessions[0]?.additionalDirectories).toEqual([
-      path.join(root, "shared-link"),
-    ])
-  })
-
   test.each(["shared/lib", "", "/shared/*", "/shared/lib?"])(
     "rejects %p before creating a session",
     async (directory) => {
@@ -155,28 +103,4 @@ describe("acp additional directories over the wire", () => {
     })
     expect(acp.server.sessions.get("ses_source")?.permissions).toEqual([grant(old), ...other])
   })
-
-  test("leaves sessions alone without additional directories", async () => {
-    await using acp = await startWire()
-    acp.server.sessions.set("ses_saved", {
-      ...makeSession("ses_saved"),
-      metadata: { host: "tui" },
-      permissions: [userGrant, ...other],
-    })
-    await acp.initialize()
-
-    const created = await acp.request("session/new", { cwd: "/workspace", mcpServers: [] })
-    await acp.request("session/load", { cwd: "/workspace", sessionId: "ses_saved", mcpServers: [] })
-    await acp.request("session/resume", { cwd: "/workspace", sessionId: "ses_saved", additionalDirectories: [] })
-
-    const create = acp.server.requests.find((request) => request.method === "POST" && request.path === "/api/session")
-    expect(create?.body).toEqual({ location: { directory: "/workspace" } })
-    expect(acp.server.sessions.get(created.sessionId)?.permissions).toBeUndefined()
-    expect(updates(acp)).toEqual([])
-    expect(
-      (await acp.request("session/list", { cwd: "/workspace" })).sessions.map(
-        (session) => session.additionalDirectories,
-      ),
-    ).toEqual([undefined, undefined])
-  })
 })

packages/cli/test/acp/cancel.subprocess.test.ts

@@ -1,84 +0,0 @@
-import type { CloseSessionResponse, PromptResponse } from "@agentclientprotocol/sdk"
-import { describe, expect, test } from "bun:test"
-import { createAcpFixture, expectOk, initialize, newSession } from "./subprocess"
-
-// The mock model holds any completion whose request mentions "hold" until the test releases it,
-// so cancellation can be exercised while the model turn is genuinely in flight.
-function heldModel() {
-  const started = Promise.withResolvers<void>()
-  const release = Promise.withResolvers<string>()
-  return {
-    started: started.promise,
-    release: () => release.resolve("released"),
-    respond(request: unknown) {
-      if (!JSON.stringify(request).includes("hold")) return "accepted"
-      started.resolve()
-      return release.promise
-    },
-  }
-}
-
-describe("acp cancel subprocess", () => {
-  test("$/cancel_request cancels the in-flight prompt and the session stays usable", async () => {
-    const model = heldModel()
-    await using fixture = await createAcpFixture({ respond: model.respond })
-    const acp = fixture.spawn()
-    await initialize(acp)
-    const session = await newSession(acp, fixture.home)
-
-    const prompt = acp.send<PromptResponse>("session/prompt", {
-      sessionId: session.sessionId,
-      prompt: [{ type: "text", text: "hold" }],
-    })
-    await model.started
-    await acp.notify("$/cancel_request", { requestId: prompt.id })
-
-    expect(expectOk(await prompt.response).stopReason).toBe("cancelled")
-    model.release()
-    const next = expectOk(
-      await acp.request<PromptResponse>("session/prompt", {
-        sessionId: session.sessionId,
-        prompt: [{ type: "text", text: "again" }],
-      }),
-    )
-    expect(next.stopReason).toBe("end_turn")
-  }, 60_000)
-
-  test("session/close settles the active prompt before responding and leaves other sessions alone", async () => {
-    const model = heldModel()
-    await using fixture = await createAcpFixture({ respond: model.respond })
-    const acp = fixture.spawn()
-    await initialize(acp)
-    const closing = await newSession(acp, fixture.home)
-    const other = await newSession(acp, fixture.home)
-
-    const prompt = acp.send<PromptResponse>("session/prompt", {
-      sessionId: closing.sessionId,
-      prompt: [{ type: "text", text: "hold" }],
-    })
-    await model.started
-    const order: string[] = []
-    const close = acp
-      .request<CloseSessionResponse>("session/close", { sessionId: closing.sessionId })
-      .then((response) => {
-        order.push("close")
-        return response
-      })
-    const cancelled = await prompt.response.then((response) => {
-      order.push("prompt")
-      return response
-    })
-
-    expect(expectOk(cancelled).stopReason).toBe("cancelled")
-    expect(expectOk(await close)).toEqual({})
-    expect(order).toEqual(["prompt", "close"])
-    model.release()
-    const next = expectOk(
-      await acp.request<PromptResponse>("session/prompt", {
-        sessionId: other.sessionId,
-        prompt: [{ type: "text", text: "still here" }],
-      }),
-    )
-    expect(next.stopReason).toBe("end_turn")
-  }, 60_000)
-})

packages/cli/test/acp/catalog-service.test.ts

@@ -1,128 +0,0 @@
-import { describe, expect } from "bun:test"
-import { OpenCode } from "@opencode/client/promise"
-import { Clock, Duration, Effect, Fiber } from "effect"
-import { TestClock } from "effect/testing"
-import { it } from "../../../core/test/lib/effect"
-import { ACPCatalog } from "../../src/acp/catalog"
-import { buildAgent, planAgent, startWire, testModel, type Wire, type WireOptions } from "./wire-fixture"
-
-describe("acp catalog service", () => {
-  it.effect("coalesces reloads requested during a reload into one more load", () => {
-    const gate = { held: false, release: Promise.withResolvers<void>() }
-    return withCatalog(
-      {
-        fetch: (request) =>
-          request.path === "/api/agent" && gate.held ? gate.release.promise.then(() => undefined) : undefined,
-      },
-      (acp) =>
-        Effect.gen(function* () {
-          const catalog = yield* ACPCatalog.Service
-          yield* catalog.get("/workspace")
-          gate.held = true
-
-          const running = yield* catalog.reload("/workspace").pipe(Effect.forkChild({ startImmediately: true }))
-          yield* Effect.promise(() => acp.until(() => requests(acp, "/api/agent") === 2, "the held reload"))
-          const queued = yield* Effect.all(
-            [0, 1].map(() => catalog.reload("/workspace").pipe(Effect.forkChild({ startImmediately: true }))),
-          )
-          acp.server.catalog.agents = [planAgent, buildAgent]
-          gate.held = false
-          gate.release.resolve()
-          yield* Fiber.join(running)
-          yield* Fiber.joinAll(queued)
-
-          expect(reads(acp, "agent")).toBe(3)
-          expect((yield* catalog.get("/workspace")).defaultModeID).toBe("plan")
-        }),
-    )
-  })
-
-  it.effect("keeps the previous catalog when a reload fails", () => {
-    const failing = { model: false }
-    return withCatalog(
-      {
-        fetch: (request) =>
-          failing.model && request.path === "/api/model"
-            ? Response.json({ name: "ModelsNotReadyError", data: { message: "catalog is warming" } }, { status: 503 })
-            : undefined,
-      },
-      () =>
-        Effect.gen(function* () {
-          const catalog = yield* ACPCatalog.Service
-          const before = yield* catalog.get("/workspace")
-          failing.model = true
-
-          yield* catalog.reload("/workspace")
-
-          expect(yield* catalog.get("/workspace")).toBe(before)
-        }),
-    )
-  })
-
-  it.effect("waits 25ms between readiness reads", () =>
-    withCatalog({}, (acp) =>
-      Effect.gen(function* () {
-        const catalog = yield* ACPCatalog.Service
-        acp.server.catalog.models = []
-
-        const loading = yield* catalog.get("/workspace").pipe(Effect.forkChild)
-        yield* Effect.promise(() => acp.until(() => reads(acp, "model") === 1, "the first model read"))
-        acp.server.catalog.models = [testModel]
-        yield* advance("5 millis", () => reads(acp, "model") === 2)
-        const retriedAt = yield* Clock.currentTimeMillis
-        const loaded = yield* Fiber.join(loading)
-
-        expect(retriedAt).toBeGreaterThanOrEqual(25)
-        expect(loaded.defaultModel).toEqual({ providerID: "test", id: "test-model", variant: "default" })
-      }),
-    ),
-  )
-
-  it.effect("gives up with the last readiness failure after 5 seconds", () =>
-    withCatalog({}, (acp) =>
-      Effect.gen(function* () {
-        const catalog = yield* ACPCatalog.Service
-        acp.server.catalog.agents = []
-
-        const loading = yield* catalog.get("/workspace").pipe(Effect.flip, Effect.timed, Effect.forkChild)
-        yield* advance("25 millis", () => loading.pollUnsafe() !== undefined)
-        const [elapsed, error] = yield* Fiber.join(loading)
-
-        expect(error).toEqual(new ACPCatalog.NotReadyError({ reason: "agents" }))
-        expect(error.message).toBe("No primary agents are available")
-        // Reads in flight while the clock steps push the last attempt slightly past the deadline.
-        expect(Duration.toMillis(elapsed)).toBeGreaterThanOrEqual(5_000)
-        expect(Duration.toMillis(elapsed)).toBeLessThan(6_000)
-      }),
-    ),
-  )
-})
-
-function withCatalog<A, E>(options: WireOptions, body: (acp: Wire) => Effect.Effect<A, E, ACPCatalog.Service>) {
-  return Effect.acquireRelease(
-    Effect.promise(() => startWire(options)),
-    (acp) => Effect.promise(() => acp[Symbol.asyncDispose]()),
-  ).pipe(
-    Effect.flatMap((acp) =>
-      body(acp).pipe(
-        Effect.provideServiceEffect(ACPCatalog.Service, ACPCatalog.make(OpenCode.make({ baseUrl: acp.server.url }))),
-      ),
-    ),
-  )
-}
-
-// Catalog reads are real HTTP that settles between sleeps, so the clock moves in steps until the reads catch up.
-function advance(step: Duration.Input, done: () => boolean) {
-  return TestClock.adjust(step).pipe(
-    Effect.andThen(TestClock.withLive(Effect.sleep("1 millis"))),
-    Effect.repeat({ until: done }),
-  )
-}
-
-function reads(acp: Wire, kind: "model" | "agent") {
-  return acp.server.catalogReads.filter((read) => read.kind === kind).length
-}
-
-function requests(acp: Wire, path: string) {
-  return acp.server.requests.filter((request) => request.path === path).length
-}