perf(desktop): show the previous shell while the renderer boots

The first window now loads its document the moment Electron is ready: the same index.html without its module scripts, plus a sanitized copy of the shell captured at the end of the previous run. The renderer process, the stylesheet and the fonts are ready while the main bundle and the layers load, and the scripts are added when the window is adopted. The renderer asks for its RPC MessagePort instead of receiving one on did-finish-load, since that event fires before the scripts exist. The startup splash and its 300 ms fade are skipped when a snapshot is present; the snapshot is removed when the interface would have been revealed, and re-captured once idle and after route changes.
2026-09-22 16:47:34 +00:00 · 2026-09-19 13:49:56 +10:00
475 changed files with 3494 additions and 10396 deletions
@@ -112,12 +112,11 @@ jobs:
      - name: Run unit tests
        timeout-minutes: 20
        run: |
-          # The runners have four vCPUs, and each Bun test process performs its own concurrent work.
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
-            GITHUB_ACTIONS=false bun turbo test --concurrency=3
+            GITHUB_ACTIONS=false bun turbo test
            exit 0
          fi
-          GITHUB_ACTIONS=false bun turbo test --affected --concurrency=3
+          GITHUB_ACTIONS=false bun turbo test --affected
        env:
          OPENCODE_EXPERIMENTAL_DISABLE_FILEWATCHER: ${{ runner.os == 'Windows' && 'true' || 'false' }}
          TURBO_SCM_BASE: ${{ github.event_name == 'pull_request' && format('{0}^1', github.sha) || github.event.before }}
@@ -32,7 +32,7 @@
    },
    "packages/ai": {
      "name": "@opencode/ai",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@aws-sdk/credential-providers": "3.1057.0",
        "@opencode/schema": "workspace:*",
@@ -54,7 +54,7 @@
    },
    "packages/app": {
      "name": "@opencode/app",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@corvu/drawer": "catalog:",
        "@dnd-kit/abstract": "0.5.0",
@@ -111,7 +111,7 @@
    },
    "packages/cli": {
      "name": "@opencode/cli",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "bin": {
        "opencode2": "./bin/opencode2.cjs",
      },
@@ -175,7 +175,7 @@
    },
    "packages/client": {
      "name": "@opencode/client",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/protocol": "workspace:*",
        "@opencode/schema": "workspace:*",
@@ -201,10 +201,11 @@
    },
    "packages/codemode": {
      "name": "@opencode/codemode",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "acorn": "8.15.0",
        "effect": "catalog:",
+        "typescript": "catalog:",
      },
      "devDependencies": {
        "@tsconfig/bun": "catalog:",
@@ -214,7 +215,7 @@
    },
    "packages/console/app": {
      "name": "@opencode/console-app",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@cloudflare/vite-plugin": "1.15.2",
        "@ibm/plex": "6.4.1",
@@ -250,7 +251,7 @@
    },
    "packages/console/core": {
      "name": "@opencode/console-core",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@aws-sdk/client-sts": "3.782.0",
        "@jsx-email/render": "1.1.1",
@@ -277,7 +278,7 @@
    },
    "packages/console/function": {
      "name": "@opencode/console-function",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@openauthjs/openauth": "0.0.0-20250322224806",
        "@opencode/console-core": "workspace:*",
@@ -294,7 +295,7 @@
    },
    "packages/console/mail": {
      "name": "@opencode/console-mail",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@jsx-email/all": "2.2.3",
        "@jsx-email/cli": "1.4.3",
@@ -318,7 +319,7 @@
    },
    "packages/console/support": {
      "name": "@opencode/console-support",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@cloudflare/vite-plugin": "1.15.2",
        "@opencode/console-core": "workspace:*",
@@ -338,7 +339,7 @@
    },
    "packages/core": {
      "name": "@opencode/core",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@ai-sdk/cohere": "3.0.27",
        "@ai-sdk/gateway": "3.0.104",
@@ -406,10 +407,10 @@
    },
    "packages/desktop": {
      "name": "@opencode/desktop",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@zip.js/zip.js": "2.7.62",
-        "electron-context-menu": "5.0.0",
+        "electron-context-menu": "4.1.2",
        "electron-log": "^5",
        "electron-updater": "6.8.9",
        "lighthouse": "13.4.1",
@@ -436,7 +437,7 @@
        "drizzle-kit": "catalog:",
        "drizzle-orm": "catalog:",
        "effect": "catalog:",
-        "electron": "44.4.3",
+        "electron": "42.10.1",
        "electron-builder": "26.15.7",
        "electron-vite": "6.0.0-beta.1",
        "puppeteer-core": "25.9.0",
@@ -455,7 +456,7 @@
    },
    "packages/enterprise": {
      "name": "@opencode/enterprise",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@hono/standard-validator": "catalog:",
        "@opencode-ai/sdk": "1.18.21",
@@ -492,7 +493,7 @@
    },
    "packages/function": {
      "name": "@opencode/function",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@octokit/auth-app": "8.0.1",
        "@octokit/rest": "catalog:",
@@ -508,7 +509,7 @@
    },
    "packages/http-recorder": {
      "name": "@opencode/http-recorder",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@effect/platform-node-shared": "4.0.0-rc.112",
      },
@@ -527,7 +528,7 @@
    },
    "packages/httpapi-codegen": {
      "name": "@opencode/httpapi-codegen",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "effect": "catalog:",
        "prettier": "3.6.2",
@@ -540,7 +541,7 @@
    },
    "packages/latex": {
      "name": "@opencode/latex",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/plugin": "workspace:*",
        "@opentui/core": "catalog:",
@@ -554,7 +555,7 @@
    },
    "packages/merman": {
      "name": "@opencode/merman",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/plugin": "workspace:*",
        "@opentui/core": "catalog:",
@@ -569,7 +570,7 @@
    },
    "packages/plugin": {
      "name": "@opencode/plugin",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@ai-sdk/provider": "3.0.8",
        "@opencode/ai": "workspace:*",
@@ -608,7 +609,7 @@
    },
    "packages/plugin-browser": {
      "name": "@opencode/plugin-browser",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/plugin": "workspace:*",
        "@opencode/schema": "workspace:*",
@@ -638,7 +639,7 @@
    },
    "packages/protocol": {
      "name": "@opencode/protocol",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/schema": "workspace:*",
        "effect": "catalog:",
@@ -653,7 +654,7 @@
    },
    "packages/schema": {
      "name": "@opencode/schema",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@standard-schema/spec": "catalog:",
        "effect": "catalog:",
@@ -677,7 +678,7 @@
    },
    "packages/sdk": {
      "name": "@opencode/sdk",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/client": "workspace:*",
        "@opencode/core": "workspace:*",
@@ -698,7 +699,7 @@
    },
    "packages/server": {
      "name": "@opencode/server",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@effect/platform-node": "catalog:",
        "@effect/platform-node-shared": "catalog:",
@@ -720,7 +721,7 @@
    },
    "packages/session-ui": {
      "name": "@opencode/session-ui",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@kobalte/core": "catalog:",
        "@opencode/client": "workspace:*",
@@ -755,7 +756,7 @@
    },
    "packages/simulation": {
      "name": "@opencode/simulation",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/ai": "workspace:*",
        "@opencode/core": "workspace:*",
@@ -775,7 +776,7 @@
    },
    "packages/stats/app": {
      "name": "@opencode/stats-app",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@ibm/plex": "6.4.1",
        "@kobalte/core": "catalog:",
@@ -809,7 +810,7 @@
    },
    "packages/stats/core": {
      "name": "@opencode/stats-core",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@aws-sdk/client-athena": "3.933.0",
        "@planetscale/database": "1.19.0",
@@ -828,7 +829,7 @@
    },
    "packages/stats/server": {
      "name": "@opencode/stats-server",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@aws-sdk/client-firehose": "3.933.0",
        "@effect/platform-node": "catalog:",
@@ -874,7 +875,7 @@
    },
    "packages/theme": {
      "name": "@opencode/theme",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opentui/core": "catalog:",
        "effect": "catalog:",
@@ -888,7 +889,7 @@
    },
    "packages/tui": {
      "name": "@opencode/tui",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@opencode/client": "workspace:*",
        "@opencode/core": "workspace:*",
@@ -923,7 +924,7 @@
    },
    "packages/ui": {
      "name": "@opencode/ui",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@kobalte/core": "catalog:",
        "@pierre/diffs": "catalog:",
@@ -958,7 +959,7 @@
    },
    "packages/util": {
      "name": "@opencode/util",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@effect/opentelemetry": "catalog:",
        "@effect/platform-node": "catalog:",
@@ -991,7 +992,7 @@
    },
    "packages/web": {
      "name": "@opencode/web",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "@astrojs/cloudflare": "12.6.3",
        "@astrojs/markdown-remark": "6.3.1",
@@ -1032,7 +1033,7 @@
    },
    "services/update": {
      "name": "@opencode/update",
-      "version": "2.0.12",
+      "version": "2.0.8",
      "dependencies": {
        "jose": "6.0.11",
        "semver": "catalog:",
@@ -3880,13 +3881,13 @@

    "ejs": ["ejs@3.1.10", "", { "dependencies": { "jake": "^10.8.5" }, "bin": { "ejs": "bin/cli.js" } }, "sha512-UeJmFfOrAQS8OJWPZ4qtgHyWExa088/MtK5UEyoJGFH67cDEXkZSviOiKRCZ4Xij0zxI3JECgYs3oKx+AizQBA=="],

-    "electron": ["electron@44.4.3", "", { "dependencies": { "@electron-internal/extract-zip": "^1.0.1", "@electron/get": "^5.0.0", "@types/node": "^24.9.0" }, "bin": { "electron": "cli.js", "install-electron": "install.js" } }, "sha512-LTpSFTB40qVCXIX5xMo+cgHI/Jjkbjw7VpB26PccEbroqOn72LBukeaDwPVo1fBYzSzs0c9iPuAucFCO7Tw81Q=="],
+    "electron": ["electron@42.10.1", "", { "dependencies": { "@electron-internal/extract-zip": "^1.0.1", "@electron/get": "^5.0.0", "@types/node": "^24.9.0" }, "bin": { "electron": "cli.js", "install-electron": "install.js" } }, "sha512-ITc1HPeoDzsxCCaH6MFsN67Nq2nUiJf5N9pBWxzhUpFfKJF0IwiAkKT3emg1lPbvC4OfFE+Cdwe4vhgdOZ1YKg=="],

    "electron-builder": ["electron-builder@26.15.7", "", { "dependencies": { "app-builder-lib": "26.15.7", "builder-util": "26.15.3", "builder-util-runtime": "9.7.0", "chalk": "^4.1.2", "ci-info": "^4.2.0", "dmg-builder": "26.15.7", "fs-extra": "^10.1.0", "lazy-val": "^1.0.5", "simple-update-notifier": "2.0.0", "yargs": "^17.6.2" }, "bin": { "electron-builder": "./cli.js", "install-app-deps": "./install-app-deps.js" } }, "sha512-DBpaNzxsPs1BvEblzFoNriSbzsBqDCy/gseIngeEhYzQG1IxfB7Hvc2tBBVmpWE2BTQGP9J1RrAvDT+Vc/uAxg=="],

    "electron-builder-squirrel-windows": ["electron-builder-squirrel-windows@26.15.7", "", { "dependencies": { "app-builder-lib": "26.15.7", "builder-util": "26.15.3", "electron-winstaller": "5.4.0" } }, "sha512-B4uvn2NzFSuf084udWqugludFull6CRJiWe2dLzMnZLl6G5hdAGk0fsBMGlBSpKjvQCJn8IPc+S7OnJ+GXqwLA=="],

-    "electron-context-menu": ["electron-context-menu@5.0.0", "", { "dependencies": { "cli-truncate": "^4.0.0", "electron-dl": "^4.0.0", "electron-is-dev": "^3.0.1" } }, "sha512-rgFpRtwY0/rhsRCoz9rE6VM4WueEsLbIpca7ucOhERVrbGB2dQrxa9xwBNLplU54jRgPuv6nTEbxoplE5bzy2A=="],
+    "electron-context-menu": ["electron-context-menu@4.1.2", "", { "dependencies": { "cli-truncate": "^4.0.0", "electron-dl": "^4.0.0", "electron-is-dev": "^3.0.1" } }, "sha512-9xYTUV0oRqKL50N9W71IrXNdVRB0LuBp3R1zkUdUc2wfIa2/QZwYYj5RLuO7Tn7ZSLVIaO3X6u+EIBK+cBvzrQ=="],

    "electron-dl": ["electron-dl@4.0.0", "", { "dependencies": { "ext-name": "^5.0.0", "pupa": "^3.1.0", "unused-filename": "^4.0.1" } }, "sha512-USiB9816d2JzKv0LiSbreRfTg5lDk3lWh0vlx/gugCO92ZIJkHVH0UM18EHvKeadErP6Xn4yiTphWzYfbA2Ong=="],

@@ -1,8 +1,8 @@
 {
  "nodeModules": {
-    "x86_64-linux": "sha256-/jah4P2a0aGJNJ0aMdlFEbGHAXx33lqxHbc7UmpLFDg=",
-    "aarch64-linux": "sha256-L3SoZ24qNXicsE2FK6LATQjOmjPxY679RjugrUyO/1Y=",
-    "aarch64-darwin": "sha256-pI9NT8KWUPi+JCk6DYMqIAYmBqTbi13uL4VdNV3WS6Y=",
-    "x86_64-darwin": "sha256-rMAGhTTz46KA5Ya7E5J0af7Bn1QzTDhTaNfNJm8qfsw="
+    "x86_64-linux": "sha256-TRfKunG6/UE8rQFyRkx/pX+pe7GT542IJWLEKcFFfAY=",
+    "aarch64-linux": "sha256-JxCYBQoHeJVuEMEe4Ef5f6UxxUCAuhPo96jqMT047Fc=",
+    "aarch64-darwin": "sha256-UEgjeQMivNC7JVsLEDlNbuqp9LJH84f9nHgLHTZ2zDI=",
+    "x86_64-darwin": "sha256-jEs/Oadjf2LVAinY0xyFna0V+NTwoCKXiXmQ83OchF8="
  }
 }
@@ -2,7 +2,7 @@
  "$schema": "https://json.schemastore.org/package.json",
  "name": "opencode",
  "description": "AI-powered development tool",
-  "version": "2.0.12",
+  "version": "2.0.8",
  "private": true,
  "type": "module",
  "packageManager": "bun@1.4.2",
@@ -29,47 +29,6 @@ await Effect.runPromise(program.pipe(Effect.provide(llmLayer)))

 Run `LLMClient.stream(request)` instead of `generate` when you want incremental `LLMEvent`s. The event stream is provider-neutral — same shape across OpenAI Chat, OpenAI Responses, Anthropic Messages, Gemini, Bedrock Converse, and any OpenAI-compatible deployment.

-## Experimental evaluation
-
-Evaluation models compare shared state with typed choice, score, and boolean questions. The API is
-isolated under an experimental entrypoint and provider namespace while the contract evolves:
-
-```ts
-import { Effect } from "effect"
-import { Evaluation, EvaluationClient } from "@opencode/ai/experimental"
-import { TypeSafeAI } from "@opencode/ai/providers"
-
-const model = TypeSafeAI.configure().experimental.evaluation("jev-latest")
-
-const program = Evaluation.evaluate({
-  model,
-  state: "I was charged twice. Please refund the duplicate payment.",
-  questions: {
-    department: {
-      type: "choice",
-      instructions: "Which team should handle this?",
-      criteria: { billing: "Payments and refunds", technical: "Bugs and outages" },
-    },
-    urgency: {
-      type: "score",
-      instructions: "How urgent is this?",
-      criteria: ["Can wait", "Needs prompt attention", "Blocking revenue"],
-    },
-    refund: { type: "boolean", instructions: "Is the customer asking for a refund?" },
-  },
-})
-
-const response = await Effect.runPromise(program.pipe(Effect.provide(EvaluationClient.fetchLayer)))
-
-console.log(response.answers.department.choice)
-console.log(response.answers.refund.probability)
-```
-
-`TypeSafeAI` reads `TYPESAFE_API_KEY`. `OpenCodeZen` exposes the same selector and reads
-`OPENCODE_API_KEY`. The common API uses `boolean`; System One routes lower it to native `noul`.
-Choice and score confidence plus score legends remain available in provider metadata, and the
-provider's rounded probabilities are returned unchanged.
-
 ## Alibaba Cloud Model Studio

 `Alibaba` provides standard Model Studio inference. Configure a region explicitly, then select
@@ -1,6 +1,6 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
-  "version": "2.0.12",
+  "version": "2.0.8",
  "name": "@opencode/ai",
  "type": "module",
  "license": "MIT",
@@ -1,29 +0,0 @@
-export { EvaluationClient } from "./experimental/evaluation-client.js"
-export {
-  BooleanAnswer,
-  BooleanQuestion,
-  ChoiceAnswer,
-  ChoiceQuestion,
-  Evaluation,
-  EvaluationAnswer,
-  EvaluationInput,
-  EvaluationModel,
-  EvaluationModelSchema,
-  EvaluationQuestion,
-  EvaluationRequest,
-  EvaluationResponse,
-  EvaluationRounding,
-  ScoreAnswer,
-  ScoreQuestion,
-} from "./experimental/evaluation.js"
-export type {
-  AnswerFor,
-  AnswersFor,
-  EvaluationModelOptions,
-  EvaluationOptions,
-  EvaluationQuestions,
-  EvaluationRequestFor,
-  EvaluationRequestInput,
-  EvaluationResponseFor,
-  EvaluationRoute,
-} from "./experimental/evaluation.js"
@@ -1,54 +0,0 @@
-import { Context, Effect, Layer } from "effect"
-import { RequestExecutor } from "../route/executor.js"
-import { mergeHttpOptions, type AIError } from "../schema/index.js"
-import { sanitizeSurrogates } from "../utils/sanitize.js"
-import {
-  type EvaluationOptions,
-  type EvaluationQuestions,
-  type EvaluationRequestFor,
-  type EvaluationResponseFor,
-} from "./evaluation.js"
-
-export type Execute = RequestExecutor.Interface["execute"]
-
-export interface Interface {
-  readonly evaluate: <Options extends EvaluationOptions, const Questions extends EvaluationQuestions>(
-    request: EvaluationRequestFor<Options, Questions>,
-  ) => Effect.Effect<EvaluationResponseFor<Questions>, AIError>
-}
-
-export class Service extends Context.Service<Service, Interface>()("@opencode/AI/Experimental/EvaluationClient") {}
-
-export const evaluate = <Options extends EvaluationOptions, const Questions extends EvaluationQuestions>(
-  request: EvaluationRequestFor<Options, Questions>,
-): Effect.Effect<EvaluationResponseFor<Questions>, AIError, Service> =>
-  Effect.flatMap(Service, (client) => client.evaluate(request))
-
-export const layer: Layer.Layer<Service, never, RequestExecutor.Service> = Layer.effect(
-  Service,
-  Effect.gen(function* () {
-    const executor = yield* RequestExecutor.Service
-    return Service.of({
-      evaluate: (request) =>
-        request.model.route.evaluate(
-          {
-            ...sanitizeSurrogates({
-              ...request,
-              model: undefined,
-              http: mergeHttpOptions(request.model.http, request.http),
-            }),
-            model: request.model,
-          },
-          executor.execute,
-        ),
-    })
-  }),
-)
-export const fetchLayer = layer.pipe(Layer.provide(RequestExecutor.fetchLayer))
-
-export const EvaluationClient = {
-  Service,
-  layer,
-  fetchLayer,
-  evaluate,
-} as const
@@ -1,245 +0,0 @@
-import { Effect, Schema } from "effect"
-import {
-  AIError,
-  HttpOptions,
-  InvalidRequestError,
-  ModelID,
-  ProviderID,
-  ProviderMetadata,
-  Usage,
-} from "../schema/index.js"
-import { EvaluationClient, Service, type Execute } from "./evaluation-client.js"
-
-export const EvaluationInput = Schema.Union([Schema.String, Schema.JsonObject, Schema.Array(Schema.Json)])
-export type EvaluationInput = Schema.Schema.Type<typeof EvaluationInput>
-
-const EvaluationCriterion = Schema.NullOr(EvaluationInput)
-const ChoiceCriteria = Schema.Record(Schema.String, EvaluationCriterion).pipe(
-  Schema.refine((x): x is typeof x => Object.keys(x).length > 0, {
-    message: "Choice criteria must be a nonempty option map",
-  }),
-)
-
-export const ChoiceQuestion = Schema.Struct({
-  type: Schema.Literal("choice"),
-  instructions: EvaluationInput,
-  criteria: ChoiceCriteria,
-})
-export type ChoiceQuestion = Schema.Schema.Type<typeof ChoiceQuestion>
-
-export const ScoreQuestion = Schema.Struct({
-  type: Schema.Literal("score"),
-  instructions: EvaluationInput,
-  criteria: Schema.Array(EvaluationCriterion).check(Schema.isMinLength(2)),
-})
-export type ScoreQuestion = Schema.Schema.Type<typeof ScoreQuestion>
-
-export const BooleanQuestion = Schema.Struct({
-  type: Schema.Literal("boolean"),
-  instructions: EvaluationInput,
-  criteria: Schema.optional(
-    Schema.Struct({
-      true: Schema.optional(EvaluationCriterion),
-      false: Schema.optional(EvaluationCriterion),
-    }),
-  ),
-})
-export type BooleanQuestion = Schema.Schema.Type<typeof BooleanQuestion>
-
-export const EvaluationQuestion = Schema.Union([ChoiceQuestion, ScoreQuestion, BooleanQuestion]).pipe(
-  Schema.toTaggedUnion("type"),
-)
-export type EvaluationQuestion = Schema.Schema.Type<typeof EvaluationQuestion>
-export type EvaluationQuestions = Readonly<Record<string, EvaluationQuestion>>
-const EvaluationQuestions = Schema.Record(Schema.String, EvaluationQuestion).pipe(
-  Schema.refine((x): x is typeof x => Object.keys(x).length > 0, {
-    message: "Evaluation questions must be a nonempty map",
-  }),
-)
-
-const Probability = Schema.Number.check(Schema.isBetween({ minimum: 0, maximum: 1 }))
-
-export const ChoiceAnswer = Schema.Struct({
-  type: Schema.Literal("choice"),
-  choice: Schema.String,
-  probabilities: Schema.optional(Schema.Record(Schema.String, Probability)),
-})
-export type ChoiceAnswer = Schema.Schema.Type<typeof ChoiceAnswer>
-
-export const ScoreAnswer = Schema.Struct({
-  type: Schema.Literal("score"),
-  score: Schema.Number,
-  probabilities: Schema.optional(Schema.Record(Schema.String, Probability)),
-})
-export type ScoreAnswer = Schema.Schema.Type<typeof ScoreAnswer>
-
-export const BooleanAnswer = Schema.Struct({
-  type: Schema.Literal("boolean"),
-  probability: Probability,
-})
-export type BooleanAnswer = Schema.Schema.Type<typeof BooleanAnswer>
-
-export const EvaluationAnswer = Schema.Union([ChoiceAnswer, ScoreAnswer, BooleanAnswer]).pipe(
-  Schema.toTaggedUnion("type"),
-)
-export type EvaluationAnswer = Schema.Schema.Type<typeof EvaluationAnswer>
-
-export type AnswerFor<Question extends EvaluationQuestion> = Question extends {
-  readonly type: "choice"
-  readonly criteria: infer Criteria
-}
-  ? {
-      readonly type: "choice"
-      readonly choice: Extract<keyof Criteria, string>
-      readonly probabilities?: Readonly<Record<Extract<keyof Criteria, string>, number>>
-    }
-  : Question extends { readonly type: "score" }
-    ? ScoreAnswer
-    : BooleanAnswer
-
-export type AnswersFor<Questions extends EvaluationQuestions> = {
-  readonly [ID in keyof Questions]: AnswerFor<Questions[ID]>
-}
-
-export type EvaluationOptions = Record<string, unknown>
-
-export interface EvaluationRoute<Options extends EvaluationOptions = EvaluationOptions> {
-  readonly id: string
-  readonly evaluate: <const Questions extends EvaluationQuestions>(
-    request: EvaluationRequestFor<Options, Questions>,
-    execute: Execute,
-  ) => Effect.Effect<EvaluationResponseFor<Questions>, AIError>
-}
-
-export class EvaluationModel<Options extends EvaluationOptions = EvaluationOptions> {
-  declare protected readonly _Options: (options: Options) => Options
-  readonly id: ModelID
-  readonly provider: ProviderID
-  readonly route: EvaluationRoute<Options>
-  readonly http?: HttpOptions
-
-  constructor(input: EvaluationModel.Input<Options>) {
-    this.id = input.id
-    this.provider = input.provider
-    this.route = input.route
-    this.http = input.http
-  }
-
-  static make<Options extends EvaluationOptions = EvaluationOptions>(input: EvaluationModel.MakeInput<Options>) {
-    return new EvaluationModel<Options>({
-      id: ModelID.make(input.id),
-      provider: ProviderID.make(input.provider),
-      route: input.route,
-      http: input.http,
-    })
-  }
-}
-
-export namespace EvaluationModel {
-  export interface Input<Options extends EvaluationOptions = EvaluationOptions> {
-    readonly id: ModelID
-    readonly provider: ProviderID
-    readonly route: EvaluationRoute<Options>
-    readonly http?: HttpOptions
-  }
-
-  export interface MakeInput<Options extends EvaluationOptions = EvaluationOptions>
-    extends Omit<Input<Options>, "id" | "provider"> {
-    readonly id: string | ModelID
-    readonly provider: string | ProviderID
-  }
-}
-
-export const EvaluationModelSchema = Schema.declare(
-  (value): value is EvaluationModel => value instanceof EvaluationModel,
-  {
-    expected: "Evaluation.Model",
-  },
-)
-
-export class EvaluationRequest extends Schema.Class<EvaluationRequest>("Evaluation.Request")({
-  model: EvaluationModelSchema,
-  state: EvaluationInput,
-  questions: EvaluationQuestions,
-  options: Schema.optional(Schema.Record(Schema.String, Schema.Unknown)),
-  http: Schema.optional(HttpOptions),
-}) {
-  declare protected readonly _EvaluationRequest: void
-}
-
-export type EvaluationModelOptions<Model> = Model extends EvaluationModel<infer Options> ? Options : never
-
-export type EvaluationRequestFor<
-  Options extends EvaluationOptions = EvaluationOptions,
-  Questions extends EvaluationQuestions = EvaluationQuestions,
-> = Omit<EvaluationRequest, "model" | "questions" | "options"> & {
-  readonly model: EvaluationModel<Options>
-  readonly questions: Questions
-  readonly options?: Options
-}
-
-export type EvaluationRequestInput<
-  Model extends object = EvaluationModel,
-  Questions extends EvaluationQuestions = EvaluationQuestions,
-> = Omit<ConstructorParameters<typeof EvaluationRequest>[0], "model" | "questions" | "options" | "http"> & {
-  readonly model: Model
-  readonly questions: Questions
-  readonly options?: NoInfer<EvaluationModelOptions<Model>>
-  readonly http?: HttpOptions.Input
-} & (Model extends EvaluationModel<EvaluationModelOptions<Model>> ? unknown : never)
-
-export class EvaluationRounding extends Schema.Class<EvaluationRounding>("Evaluation.Rounding")({
-  probabilityDecimals: Schema.optional(Schema.Int),
-  scoreDecimals: Schema.optional(Schema.Int),
-}) {}
-
-export class EvaluationResponse extends Schema.Class<EvaluationResponse>("Evaluation.Response")({
-  model: ModelID,
-  answers: Schema.Record(Schema.String, EvaluationAnswer),
-  usage: Schema.optional(Usage),
-  rounding: Schema.optional(EvaluationRounding),
-  providerMetadata: Schema.optional(ProviderMetadata),
-}) {}
-
-export type EvaluationResponseFor<Questions extends EvaluationQuestions> = Omit<EvaluationResponse, "answers"> & {
-  readonly answers: AnswersFor<Questions>
-}
-
-export function request<const Model extends object, const Questions extends EvaluationQuestions>(
-  input: EvaluationRequestInput<Model, Questions>,
-): EvaluationRequestFor<EvaluationModelOptions<Model>, Questions>
-export function request(input: EvaluationRequest): EvaluationRequest
-export function request(input: EvaluationRequest | EvaluationRequestInput) {
-  if (input instanceof EvaluationRequest) return input
-  return new EvaluationRequest({
-    ...input,
-    model: input.model as unknown as EvaluationModel,
-    http: input.http === undefined ? undefined : HttpOptions.make(input.http),
-  })
-}
-
-export function evaluate<const Model extends object, const Questions extends EvaluationQuestions>(
-  input: EvaluationRequestInput<Model, Questions>,
-): Effect.Effect<EvaluationResponseFor<Questions>, AIError, Service>
-export function evaluate(input: EvaluationRequest): Effect.Effect<EvaluationResponse, AIError, Service>
-export function evaluate(input: EvaluationRequest | EvaluationRequestInput) {
-  return Effect.try({
-    try: () => (input instanceof EvaluationRequest ? input : request(input)),
-    catch: (cause) =>
-      new AIError({
-        reason: new InvalidRequestError({
-          message: cause instanceof Error ? cause.message : String(cause),
-          cause,
-        }),
-      }),
-  }).pipe(
-    Effect.flatMap((request) =>
-      EvaluationClient.evaluate(request as EvaluationRequestFor<EvaluationOptions, EvaluationQuestions>),
-    ),
-  )
-}
-
-export const Evaluation = {
-  request,
-  evaluate,
-} as const
@@ -1,222 +0,0 @@
-import { Effect, Schema } from "effect"
-import { Headers, HttpClientRequest } from "effect/unstable/http"
-import {
-  BooleanAnswer,
-  ChoiceAnswer,
-  ChoiceQuestion,
-  EvaluationInput,
-  EvaluationModel,
-  EvaluationResponse,
-  EvaluationRounding,
-  ScoreAnswer,
-  ScoreQuestion,
-  type EvaluationResponseFor,
-  type EvaluationRoute,
-} from "./evaluation.js"
-import { Auth, type Definition as AuthDefinition } from "../route/auth.js"
-import {
-  AIError,
-  HttpContext,
-  HttpOptions,
-  InvalidProviderOutputError,
-  InvalidRequestError,
-  ModelID,
-  Usage,
-  mergeJsonRecords,
-} from "../schema/index.js"
-
-const Noul = Schema.Struct({
-  type: Schema.Literal("noul"),
-  instructions: EvaluationInput,
-  criteria: Schema.optional(
-    Schema.Struct({
-      true: Schema.optional(Schema.NullOr(EvaluationInput)),
-      false: Schema.optional(Schema.NullOr(EvaluationInput)),
-    }),
-  ),
-})
-const Question = Schema.Union([
-  ChoiceQuestion.pipe(
-    Schema.refine((x): x is typeof x => Object.keys(x.criteria).length <= 255, {
-      message: "System One Choice questions support at most 255 options",
-    }),
-  ),
-  ScoreQuestion.pipe(
-    Schema.refine((x): x is typeof x => x.criteria.length <= 10, {
-      message: "System One Score questions support at most 10 levels",
-    }),
-  ),
-  Noul,
-])
-const Request = Schema.StructWithRest(
-  Schema.Struct({
-    model: Schema.String,
-    state: EvaluationInput,
-    questions: Schema.Record(Schema.String, Question),
-  }),
-  [Schema.Record(Schema.String, Schema.Any)],
-)
-
-const Probability = Schema.Number.check(Schema.isBetween({ minimum: 0, maximum: 1 }))
-const NoulAnswer = Schema.Struct({ type: Schema.Literal("noul"), noul: Probability })
-const Choice = Schema.Struct({
-  type: Schema.Literal("choice"),
-  choice: Schema.String,
-  probabilities: Schema.Record(Schema.String, Probability),
-  confidence: Schema.optional(Probability),
-})
-const Score = Schema.Struct({
-  type: Schema.Literal("score"),
-  score: Schema.Number,
-  probabilities: Schema.Record(Schema.String, Probability),
-  legend: Schema.optional(Schema.Record(Schema.String, Schema.Json)),
-  confidence: Schema.optional(Probability),
-})
-const NativeUsage = Schema.Struct({
-  input_tokens: Schema.optional(Schema.Number),
-  output_tokens: Schema.optional(Schema.Number),
-})
-
-const encode = Schema.encodeUnknownEffect(Schema.fromJsonString(Request))
-const exact = (x: Readonly<Record<string, unknown>>, keys: ReadonlyArray<string>) =>
-  Object.keys(x).length === keys.length && keys.every((key) => Object.hasOwn(x, key))
-
-export interface ModelInput {
-  readonly id: string | ModelID
-  readonly provider: string
-  readonly providerMetadataKey: string
-  readonly auth: AuthDefinition
-  readonly baseURL: string
-  readonly headers?: Record<string, string>
-  readonly http?: HttpOptions
-}
-
-export const model = (cfg: ModelInput) => {
-  const route: EvaluationRoute = {
-    id: "system-one",
-    evaluate: (req, send) =>
-      Effect.gen(function* () {
-        const url = new URL(`${cfg.baseURL.replace(/\/$/, "")}/systemone`)
-        Object.entries(req.http?.query ?? {}).forEach(([key, value]) => url.searchParams.set(key, value))
-        const body = yield* encode({
-          ...mergeJsonRecords(req.options, req.http?.body),
-          model: req.model.id,
-          state: req.state,
-          questions: Object.fromEntries(
-            Object.entries(req.questions).map(([id, x]) => [id, x.type === "boolean" ? { ...x, type: "noul" } : x]),
-          ),
-        }).pipe(
-          Effect.mapError(
-            (cause) => new AIError({ reason: new InvalidRequestError({ message: cause.message, cause }) }),
-          ),
-        )
-        const headers = yield* Auth.toEffect(cfg.auth)({
-          request: req,
-          method: "POST",
-          url: url.toString(),
-          body,
-          headers: Headers.fromInput({ ...cfg.headers, ...req.http?.headers }),
-        })
-        const res = yield* send(
-          HttpClientRequest.post(url).pipe(
-            HttpClientRequest.setHeaders(headers),
-            HttpClientRequest.bodyText(body, "application/json"),
-          ),
-        )
-        const http = new HttpContext({ url: res.request.url, status: res.status, headers: res.headers })
-        const fail = (message: string, cause: unknown, body?: string) =>
-          new AIError({ reason: new InvalidProviderOutputError({ route: route.id, message, body, http, cause }) })
-        const text = yield* res.text.pipe(
-          Effect.mapError((cause) => fail("Failed to read the System One response", cause)),
-        )
-        const entries = Object.entries(req.questions)
-        const output = Schema.Struct({
-          model: Schema.String,
-          answers: Schema.Struct(
-            Object.fromEntries(
-              entries.map(([id, question]) => {
-                if (question.type === "boolean") return [id, NoulAnswer]
-                if (question.type === "choice") {
-                  const keys = Object.keys(question.criteria)
-                  return [
-                    id,
-                    Choice.pipe(
-                      Schema.refine(
-                        (x): x is typeof x =>
-                          Object.hasOwn(question.criteria, x.choice) && exact(x.probabilities, keys),
-                        { message: `Question "${id}" returned an invalid choice answer` },
-                      ),
-                    ),
-                  ]
-                }
-                const keys = question.criteria.map((_, index) => String(index))
-                return [
-                  id,
-                  Score.pipe(
-                    Schema.refine(
-                      (x): x is typeof x =>
-                        x.score >= 0 && x.score <= question.criteria.length - 1 && exact(x.probabilities, keys),
-                      { message: `Question "${id}" returned an invalid score answer` },
-                    ),
-                  ),
-                ]
-              }),
-            ) as Record<string, Schema.Codec<unknown>>,
-          ),
-          usage: Schema.optional(NativeUsage),
-        })
-        const data = yield* Schema.decodeUnknownEffect(Schema.fromJsonString(output))(text).pipe(
-          Effect.mapError((cause) => fail("System One returned an invalid response", cause, text)),
-        )
-
-        const confidence: Record<string, number> = {}
-        const legend: Record<string, Record<string, Schema.Json>> = {}
-        const answers = Object.fromEntries(
-          entries.map(([id, question]) => {
-            const answer = data.answers[id]
-            if (question.type === "boolean")
-              return [
-                id,
-                { type: "boolean", probability: (answer as typeof NoulAnswer.Type).noul } satisfies BooleanAnswer,
-              ]
-            if (question.type === "choice") {
-              const value = answer as typeof Choice.Type
-              if (value.confidence !== undefined) confidence[id] = value.confidence
-              return [
-                id,
-                { type: "choice", choice: value.choice, probabilities: value.probabilities } satisfies ChoiceAnswer,
-              ]
-            }
-            const value = answer as typeof Score.Type
-            if (value.confidence !== undefined) confidence[id] = value.confidence
-            if (value.legend !== undefined) legend[id] = value.legend
-            return [id, { type: "score", score: value.score, probabilities: value.probabilities } satisfies ScoreAnswer]
-          }),
-        )
-        const meta = {
-          ...(Object.keys(confidence).length === 0 ? {} : { confidence }),
-          ...(Object.keys(legend).length === 0 ? {} : { legend }),
-        }
-        return new EvaluationResponse({
-          model: ModelID.make(data.model),
-          answers,
-          usage: data.usage
-            ? new Usage({
-                inputTokens: data.usage.input_tokens,
-                outputTokens: data.usage.output_tokens,
-                totalTokens:
-                  data.usage.input_tokens === undefined && data.usage.output_tokens === undefined
-                    ? undefined
-                    : (data.usage.input_tokens ?? 0) + (data.usage.output_tokens ?? 0),
-                providerMetadata: { [cfg.providerMetadataKey]: data.usage },
-              })
-            : undefined,
-          rounding: new EvaluationRounding({ probabilityDecimals: 2, scoreDecimals: 2 }),
-          providerMetadata: Object.keys(meta).length === 0 ? undefined : { [cfg.providerMetadataKey]: meta },
-        }) as EvaluationResponseFor<typeof req.questions>
-      }),
-  }
-  return EvaluationModel.make({ id: cfg.id, provider: cfg.provider, route, http: cfg.http })
-}
-
-export const SystemOne = { model } as const
@@ -73,6 +73,11 @@ const driver = (options: Options, body: string): WebSocketChannelDriver => {
          )
        if (event.type === "error") {
          terminal = true
+          yield* OpenResponses.decodeKnownErrorEvent(event).pipe(
+            Effect.mapError((cause) =>
+              ProviderShared.eventError(options.id, `${options.name} returned a malformed error event`, frame, cause),
+            ),
+          )
          return {
            type: "provider-failure",
            error: OpenResponses.providerFailure(event, `${options.name} stream error`, frame),
@@ -108,7 +108,7 @@ const incremental = (
  return input.slice(baseline.length)
 }

-const code = (event: OpenResponses.Event) => OpenResponses.errorDetail(event).code
+const code = (event: OpenResponses.Event) => event.code || event.error?.code || event.response?.error?.code || undefined

 const rejected = (
  observation: Extract<ChannelObservation, { readonly type: "provider-failure" }>,
@@ -1,4 +1,4 @@
-import { Effect, Option, Schema } from "effect"
+import { Effect, Option, Schema, SchemaGetter } from "effect"
 import type { Content } from "@opencode/schema/tool"
 import { HttpTransport } from "../route/transport/index.js"
 import { Protocol } from "../route/protocol.js"
@@ -333,13 +333,53 @@ export const StreamItem = Schema.StructWithRest(
 export type StreamItem = Schema.Schema.Type<typeof StreamItem>
 export type OutputItem = StreamItem & { readonly id: string }

-// Responses-compatible providers put error details at the top level, under `error`, or under
-// `response.error`, and gateways reshape them freely: strings, numeric codes, extra fields. Those
-// fields decode as opaque values and `errorDetail` reads them defensively, so an error frame can
-// only fail on invalid JSON and otherwise always classifies with the raw body as the fallback.
+// Responses-compatible providers put streaming error details at the top level or
+// under `error`, and response failures under `response.error`. Accept all three shapes.
 // https://www.openresponses.org/specification
-const asText = (value: unknown) =>
-  typeof value === "string" && value.length > 0 ? value : typeof value === "number" ? String(value) : undefined
+const OpenResponsesErrorObject = Schema.Struct({
+  type: optionalNull(Schema.String),
+  code: optionalNull(Schema.String),
+  message: optionalNull(Schema.String),
+  param: optionalNull(Schema.String),
+})
+const OpenResponsesErrorPayload = Schema.Union([Schema.String, OpenResponsesErrorObject]).pipe(
+  Schema.decodeTo(OpenResponsesErrorObject, {
+    decode: SchemaGetter.transform((error) => (typeof error === "string" ? { message: error } : error)),
+    encode: SchemaGetter.passthrough(),
+  }),
+)
+type OpenResponsesErrorPayload = Schema.Schema.Type<typeof OpenResponsesErrorPayload>
+
+const WebSocketErrorHeader = Schema.Union([Schema.String, Schema.Number, Schema.Boolean])
+export const WebSocketErrorEvent = Schema.StructWithRest(
+  Schema.Struct({
+    type: Schema.tag("error"),
+    status: Schema.optional(Schema.Number),
+    status_code: Schema.optional(Schema.Number),
+    code: optionalNull(Schema.String),
+    message: Schema.optional(Schema.String),
+    param: optionalNull(Schema.String),
+    error: optionalNull(OpenResponsesErrorPayload),
+    headers: Schema.optional(Schema.Record(Schema.String, WebSocketErrorHeader)),
+  }),
+  [Schema.Record(Schema.String, Schema.Unknown)],
+)
+const decodeWebSocketErrorEvent = Schema.decodeUnknownEffect(WebSocketErrorEvent)
+
+export const decodeKnownErrorEvent = (event: Event) =>
+  decodeWebSocketErrorEvent({
+    ...event,
+    status: typeof event.status === "number" ? event.status : undefined,
+    status_code: typeof event.status_code === "number" ? event.status_code : undefined,
+    headers: ProviderShared.isRecord(event.headers)
+      ? Object.fromEntries(
+          Object.entries(event.headers).filter(
+            (entry): entry is [string, string | number | boolean] =>
+              typeof entry[1] === "string" || typeof entry[1] === "number" || typeof entry[1] === "boolean",
+          ),
+        )
+      : undefined,
+  })

 export const Event = Schema.StructWithRest(
  Schema.Struct({
@@ -360,18 +400,31 @@ export const Event = Schema.StructWithRest(
          incomplete_details: optionalNull(Schema.Struct({ reason: Schema.optional(Schema.String) })),
          output: Schema.optional(Schema.Array(StreamItem)),
          usage: optionalNull(OpenResponsesUsage),
-          error: Schema.optional(Schema.Unknown),
+          error: optionalNull(OpenResponsesErrorPayload),
        }),
        [Schema.Record(Schema.String, Schema.Unknown)],
      ),
    ),
-    code: Schema.optional(Schema.Unknown),
-    message: Schema.optional(Schema.Unknown),
-    error: Schema.optional(Schema.Unknown),
+    code: optionalNull(Schema.String),
+    message: Schema.optional(Schema.String),
+    param: optionalNull(Schema.String),
+    error: optionalNull(OpenResponsesErrorPayload),
    status: Schema.optional(Schema.Unknown),
    status_code: Schema.optional(Schema.Unknown),
+    headers: Schema.optional(Schema.Unknown),
  }),
  [Schema.Record(Schema.String, Schema.Unknown)],
+).pipe(
+  Schema.decode({
+    decode: SchemaGetter.transform((event) => {
+      if (event.type !== "error" || event.error != null) return event
+      const { code, message, param, ...rest } = event
+      if (code === undefined && message === undefined && param === undefined) return event
+      // Flat errors (for example, Meta's) can also arrive through generic Responses endpoints.
+      return { ...rest, error: { code, message, param } }
+    }),
+    encode: SchemaGetter.passthrough(),
+  }),
 )
 export type Event = Schema.Schema.Type<typeof Event>
 export type NormalizedEvent = Event & { readonly item?: OutputItem | null }
@@ -380,15 +433,16 @@ const decodeEventValue = Schema.decodeUnknownEffect(Event)
 const decodeFrame = Schema.decodeUnknownEffect(ProviderShared.Json)

 /**
- * Decodes one WebSocket frame. Some providers and gateways answer a rejected `response.create` with a bare
- * `{ "error": ... }` envelope and no event type; that reads as an error event so it classifies instead of
- * failing decoding.
+ * Decodes one WebSocket frame. xAI answers a rejected `response.create` with `{ "error": { "message", "type" } }` and no
+ * event type; that envelope reads as an error event so the failure classifies instead of failing decoding.
 */
 export const decodeChannelEvent = (frame: string) =>
  decodeFrame(frame).pipe(
    Effect.flatMap((value) =>
      decodeEventValue(
-        ProviderShared.isRecord(value) && value.type === undefined && value.error != null
+        ProviderShared.isRecord(value) &&
+          value.type === undefined &&
+          (typeof value.error === "string" || ProviderShared.isRecord(value.error))
          ? { ...value, type: "error" }
          : value,
      ),
@@ -1368,21 +1422,22 @@ const onResponseFinish = Effect.fn("OpenResponses.onResponseFinish")(function* (
  return [{ ...current, lifecycle }, events] satisfies StepResult
 })

-/** Error code and message from wherever the frame put them; top-level fields win over nested ones. */
-export const errorDetail = (event: Event) => {
-  const raw = event.error ?? event.response?.error
-  const nested = typeof raw === "string" ? { message: raw } : ProviderShared.isRecord(raw) ? raw : undefined
-  return {
-    message: asText(event.message) ?? asText(nested?.message),
-    code: asText(event.code) ?? asText(nested?.code),
-  }
+// Build the prettiest summary available from whatever the provider supplied.
+// When both code and message are present, prefix the code so consumers see
+// the failure mode (e.g. `rate_limit_exceeded: Slow down`) instead of just
+// the bare message — production rate limits and context-length failures used
+// to be indistinguishable from generic stream drops. Returns undefined when
+// the payload carries no usable summary.
+const providerErrorMessage = (event: Event, nested: OpenResponsesErrorPayload | undefined): string | undefined => {
+  const message = event.message || nested?.message || undefined
+  const code = event.code || nested?.code || undefined
+  if (message && code) return `${code}: ${message}`
+  return message || code
 }

-// Prefix the code when both are present (`rate_limit_exceeded: Slow down`) so the failure mode is
-// visible; fall back to the raw frame rather than a generic message when neither decodes.
 export const providerFailure = (event: Event, fallback: string, body = ProviderShared.encodeJson(event)) => {
-  const detail = errorDetail(event)
-  const summary = detail.message && detail.code ? `${detail.code}: ${detail.message}` : (detail.message ?? detail.code)
+  const nested = event.error ?? event.response?.error ?? undefined
+  const summary = providerErrorMessage(event, nested)
  const message = summary ?? (body === "{}" ? fallback : body)
  const status =
    typeof event.status === "number"
@@ -1465,7 +1520,18 @@ export const step = (state: ParserState, event: NormalizedEvent) => {
  if (event.type === "response.output_item.done") return onOutputItemDone(state, event.item)
  if (event.type === "response.completed" || event.type === "response.incomplete") return onResponseFinish(state, event)
  if (event.type === "response.failed") return providerFailure(event, `${state.name} response failed`)
-  if (event.type === "error") return providerFailure(event, `${state.name} stream error`)
+  if (event.type === "error")
+    return decodeKnownErrorEvent(event).pipe(
+      Effect.mapError((cause) =>
+        ProviderShared.eventError(
+          state.id,
+          `${state.name} returned a malformed error event`,
+          ProviderShared.encodeJson(event),
+          cause,
+        ),
+      ),
+      Effect.flatMap(() => providerFailure(event, `${state.name} stream error`)),
+    )
  return Effect.succeed<StepResult>([state, NO_EVENTS])
 }

@@ -38,13 +38,23 @@ export type Settings = ProviderPackage.Settings &

 const fromRequest = Effect.fn("GoogleVertex.fromRequest")(function* (request: LLMRequest) {
  const { serviceTier: _, ...body } = yield* Gemini.protocol.body.from(request)
+  // Vertex's native REST schema rejects `id` on FunctionCall/FunctionResponse parts with HTTP 400,
+  // unlike AI Studio, so history minted there cannot be lowered verbatim.
+  const contents = body.contents.map((content) => ({
+    ...content,
+    parts: (content.parts ?? []).map((part) => {
+      if ("functionCall" in part) return { ...part, functionCall: { ...part.functionCall, id: undefined } }
+      if ("functionResponse" in part) return { ...part, functionResponse: { ...part.functionResponse, id: undefined } }
+      return part
+    }),
+  }))
  const value = request.providerOptions?.labels
  const labels = ProviderShared.isRecord(value)
    ? Object.fromEntries(
        Object.entries(value).filter((entry): entry is [string, string] => typeof entry[1] === "string"),
      )
    : undefined
-  return { ...body, labels }
+  return { ...body, contents, labels }
 })

 const protocol = {
@@ -24,10 +24,8 @@ export * as Moonshot from "./moonshot.js"
 export * as OpenAI from "./openai.js"
 export * as OpenAICompatible from "./openai-compatible.js"
 export * as OpenAICompatibleResponses from "./openai-compatible-responses.js"
-export * as OpenCodeZen from "./opencode-zen.js"
 export * as OpenRouter from "./openrouter.js"
 export * as TogetherAI from "./togetherai.js"
-export * as TypeSafeAI from "./typesafe-ai.js"
 export * as XAI from "./xai.js"
 export * as ZAI from "./zai.js"
 export * as ZAICodingPlan from "./zai-coding-plan.js"
@@ -1,31 +0,0 @@
-import { HttpOptions, ProviderID, type ModelID } from "../schema/index.js"
-import { AuthOptions, type ProviderAuthOption } from "../route/auth-options.js"
-import { SystemOne } from "../experimental/system-one.js"
-
-export const id = ProviderID.make("opencode")
-const baseURL = "https://opencode.ai/zen/v1"
-
-export type Options = ProviderAuthOption<"optional"> & {
-  readonly baseURL?: string
-  readonly headers?: Record<string, string>
-  readonly http?: HttpOptions.Input
-}
-
-export const configure = (input: Options = {}) => {
-  const evaluation = (modelID: string | ModelID) =>
-    SystemOne.model({
-      id: modelID,
-      provider: id,
-      providerMetadataKey: "opencode",
-      auth: AuthOptions.bearer(input, "OPENCODE_API_KEY"),
-      baseURL: input.baseURL ?? baseURL,
-      headers: input.headers,
-      http: input.http === undefined ? undefined : HttpOptions.make(input.http),
-    })
-  return { id, experimental: { evaluation }, configure }
-}
-
-export const provider = configure()
-export const experimental = provider.experimental
-
-export * as OpenCodeZen from "./opencode-zen.js"
@@ -1,31 +0,0 @@
-import { HttpOptions, ProviderID, type ModelID } from "../schema/index.js"
-import { AuthOptions, type ProviderAuthOption } from "../route/auth-options.js"
-import { SystemOne } from "../experimental/system-one.js"
-
-export const id = ProviderID.make("typesafe-ai")
-const baseURL = "https://api.typesafe.ai/v1"
-
-export type Options = ProviderAuthOption<"optional"> & {
-  readonly baseURL?: string
-  readonly headers?: Record<string, string>
-  readonly http?: HttpOptions.Input
-}
-
-export const configure = (input: Options = {}) => {
-  const evaluation = (modelID: string | ModelID) =>
-    SystemOne.model({
-      id: modelID,
-      provider: id,
-      providerMetadataKey: "typesafe",
-      auth: AuthOptions.bearer(input, "TYPESAFE_API_KEY"),
-      baseURL: input.baseURL ?? baseURL,
-      headers: input.headers,
-      http: input.http === undefined ? undefined : HttpOptions.make(input.http),
-    })
-  return { id, experimental: { evaluation }, configure }
-}
-
-export const provider = configure()
-export const experimental = provider.experimental
-
-export * as TypeSafeAI from "./typesafe-ai.js"
@@ -215,9 +215,7 @@ export const fromWebSocket = (
 ): Effect.Effect<WebSocketConnection, AIError> =>
  Effect.gen(function* () {
    yield* waitOpen(ws, input)
-    // The socket pushes frames synchronously and cannot be paused, so the hand-off to the consumer
-    // fiber must absorb whole read buffers. Bun delivers over a thousand small frames in one tick.
-    const messages = yield* Queue.unbounded<string | Uint8Array, AIError | Cause.Done<void>>()
+    const messages = yield* Queue.bounded<string | Uint8Array, AIError | Cause.Done<void>>(128)

    const oversized = (message: string | Uint8Array) =>
      typeof message === "string" ? new Blob([message]).size > MAX_FRAME_BYTES : message.byteLength > MAX_FRAME_BYTES
@@ -240,7 +238,19 @@ export const fromWebSocket = (
    }
    const offer = (message: string | Uint8Array) => {
      if (rejectOversized(message)) return
-      Queue.offerUnsafe(messages, message)
+      if (Queue.offerUnsafe(messages, message)) return
+      Queue.failCauseUnsafe(
+        messages,
+        Cause.fail(
+          transportError("WebSocket inbound queue overflow", {
+            body: typeof message === "string" ? message : new TextDecoder().decode(message),
+            url: input.url,
+            operation: "read",
+            code: "queue-overflow",
+            phase: "receive",
+          }),
+        ),
+      )
    }

    const onMessage = (event: MessageEvent) => {
@@ -1,173 +0,0 @@
-import { describe, expect } from "bun:test"
-import { Effect, Layer } from "effect"
-import { HttpClientRequest } from "effect/unstable/http"
-import { Evaluation, EvaluationClient } from "../src/experimental.js"
-import { OpenCodeZen, TypeSafeAI } from "../src/providers.js"
-import { it } from "./lib/effect.js"
-import { dynamicResponse } from "./lib/http.js"
-
-describe("experimental Evaluation", () => {
-  it.effect("evaluates typed questions through System One", () =>
-    Effect.gen(function* () {
-      const response = yield* Evaluation.evaluate({
-        model: TypeSafeAI.configure({
-          apiKey: "test",
-          baseURL: "https://typesafe.test/v1/",
-          headers: { "x-default": "yes" },
-          http: { body: { deployment: "test" }, query: { api: "v1" } },
-        }).experimental.evaluation("jev-latest"),
-        state: { ticket: "Please refund the duplicate charge." },
-        questions: {
-          department: {
-            type: "choice",
-            instructions: "Which team should handle this?",
-            criteria: { billing: "Payments and refunds", technical: "Bugs and outages" },
-          },
-          urgency: {
-            type: "score",
-            instructions: "How urgent is this?",
-            criteria: ["Can wait", "Needs attention", "Blocking"],
-          },
-          refund: { type: "boolean", instructions: "Is the customer asking for a refund?" },
-        },
-        options: { trace: { enabled: true } },
-        http: { body: { request_metadata: "value" }, headers: { "x-request": "yes" }, query: { trace: "1" } },
-      })
-
-      expect(response.model).toBe("jev-1.13.0")
-      expect(response.answers.department).toEqual({
-        type: "choice",
-        choice: "billing",
-        probabilities: { billing: 0.9, technical: 0.1 },
-      })
-      expect(response.answers.urgency).toEqual({
-        type: "score",
-        score: 1.2,
-        probabilities: { "0": 0, "1": 0.8, "2": 0.2 },
-      })
-      expect(response.answers.refund).toEqual({ type: "boolean", probability: 0.97 })
-      expect(response.usage?.totalTokens).toBe(36)
-      expect(response.providerMetadata).toEqual({
-        typesafe: {
-          confidence: { department: 0.8, urgency: 0.6 },
-          legend: { urgency: { "0": "Can wait", "1": "Needs attention", "2": "Blocking" } },
-        },
-      })
-    }).pipe(
-      Effect.provide(
-        EvaluationClient.layer.pipe(
-          Layer.provide(
-            dynamicResponse((input) =>
-              Effect.gen(function* () {
-                const request = yield* HttpClientRequest.toWeb(input.request).pipe(Effect.orDie)
-                expect(request.url).toBe("https://typesafe.test/v1/systemone?api=v1&trace=1")
-                expect(request.headers.get("authorization")).toBe("Bearer test")
-                expect(request.headers.get("x-default")).toBe("yes")
-                expect(request.headers.get("x-request")).toBe("yes")
-                expect(JSON.parse(input.text)).toEqual({
-                  deployment: "test",
-                  request_metadata: "value",
-                  trace: { enabled: true },
-                  model: "jev-latest",
-                  state: { ticket: "Please refund the duplicate charge." },
-                  questions: {
-                    department: {
-                      type: "choice",
-                      instructions: "Which team should handle this?",
-                      criteria: { billing: "Payments and refunds", technical: "Bugs and outages" },
-                    },
-                    urgency: {
-                      type: "score",
-                      instructions: "How urgent is this?",
-                      criteria: ["Can wait", "Needs attention", "Blocking"],
-                    },
-                    refund: { type: "noul", instructions: "Is the customer asking for a refund?" },
-                  },
-                })
-                return input.respond(
-                  JSON.stringify({
-                    model: "jev-1.13.0",
-                    answers: {
-                      department: {
-                        type: "choice",
-                        choice: "billing",
-                        probabilities: { billing: 0.9, technical: 0.1 },
-                        confidence: 0.8,
-                      },
-                      urgency: {
-                        type: "score",
-                        score: 1.2,
-                        probabilities: { "0": 0, "1": 0.8, "2": 0.2 },
-                        legend: { "0": "Can wait", "1": "Needs attention", "2": "Blocking" },
-                        confidence: 0.6,
-                      },
-                      refund: { type: "noul", noul: 0.97 },
-                    },
-                    usage: { input_tokens: 30, output_tokens: 6 },
-                  }),
-                  { headers: { "content-type": "application/json" } },
-                )
-              }),
-            ),
-          ),
-        ),
-      ),
-    ),
-  )
-
-  it.effect("configures the OpenCode Zen System One endpoint", () =>
-    Evaluation.evaluate({
-      model: OpenCodeZen.configure({ apiKey: "zen-key", baseURL: "https://zen.test/v1" }).experimental.evaluation(
-        "jev-1.13",
-      ),
-      state: "hello",
-      questions: { greeting: { type: "boolean", instructions: "Is this a greeting?" } },
-    }).pipe(
-      Effect.tap((response) =>
-        Effect.sync(() => {
-          expect(response.answers.greeting.probability).toBe(0.99)
-          expect(response.usage?.providerMetadata).toEqual({
-            opencode: { input_tokens: 10, output_tokens: 2 },
-          })
-        }),
-      ),
-      Effect.provide(
-        EvaluationClient.layer.pipe(
-          Layer.provide(
-            dynamicResponse((input) => {
-              expect(input.request.url).toBe("https://zen.test/v1/systemone")
-              expect(input.request.headers.authorization).toBe("Bearer zen-key")
-              return Effect.succeed(
-                input.respond(
-                  JSON.stringify({
-                    model: "jev-1.13.0",
-                    answers: { greeting: { type: "noul", noul: 0.99 } },
-                    usage: { input_tokens: 10, output_tokens: 2 },
-                  }),
-                  { headers: { "content-type": "application/json" } },
-                ),
-              )
-            }),
-          ),
-        ),
-      ),
-    ),
-  )
-
-  it.effect("rejects malformed questions before network I/O", () =>
-    Effect.gen(function* () {
-      const error = yield* Evaluation.evaluate({
-        model: TypeSafeAI.experimental.evaluation("jev-latest"),
-        state: "hello",
-        questions: { score: { type: "score", instructions: "How much?", criteria: ["only"] } },
-      }).pipe(Effect.flip)
-      expect(error.reason._tag).toBe("InvalidRequest")
-    }).pipe(
-      Effect.provide(
-        EvaluationClient.layer.pipe(
-          Layer.provide(dynamicResponse(() => Effect.die("invalid evaluation reached the network"))),
-        ),
-      ),
-    ),
-  )
-})
@@ -1,60 +0,0 @@
-import { Effect } from "effect"
-import { Evaluation, EvaluationClient, EvaluationModel, type EvaluationRoute } from "../src/experimental.js"
-import type { Service } from "../src/experimental/evaluation-client.js"
-import { OpenCodeZen, TypeSafeAI } from "../src/providers.js"
-
-type Requirements<T> = T extends Effect.Effect<infer _A, infer _E, infer R> ? R : never
-type Success<T> = T extends Effect.Effect<infer A, infer _E, infer _R> ? A : never
-type Equal<A, B> = [A, B] extends [B, A] ? true : false
-type Assert<T extends true> = T
-
-const model = TypeSafeAI.configure({ apiKey: "test" }).experimental.evaluation("jev-latest")
-const request = Evaluation.request({
-  model,
-  state: { ticket: "refund" },
-  questions: {
-    topic: {
-      type: "choice",
-      instructions: "Which team?",
-      criteria: { billing: null, support: { includes: ["help"] } },
-    },
-    severity: { type: "score", instructions: "How severe?", criteria: ["Low", "High"] },
-    refund: { type: "boolean", instructions: "Refund?" },
-  },
-})
-
-const result = EvaluationClient.evaluate(request)
-type Result = Success<typeof result>
-type Choice = Assert<Equal<Result["answers"]["topic"]["choice"], "billing" | "support">>
-type ClientRequirements = Assert<Equal<Requirements<typeof result>, Service>>
-void (true satisfies Choice)
-void (true satisfies ClientRequirements)
-
-Effect.gen(function* () {
-  const response = yield* Evaluation.evaluate({
-    model: OpenCodeZen.experimental.evaluation("jev-1.13"),
-    state: ["hello"],
-    questions: { greeting: { type: "boolean", instructions: "Greeting?" } },
-  })
-  response.answers.greeting.probability satisfies number
-  // @ts-expect-error Boolean answers do not contain a selected choice.
-  response.answers.greeting.choice
-  // @ts-expect-error Unknown question IDs are not exposed.
-  response.answers.missing
-})
-
-declare const route: EvaluationRoute<{ readonly temperature?: number }>
-const custom = EvaluationModel.make({ id: "custom", provider: "custom", route })
-Evaluation.evaluate({
-  model: custom,
-  state: "hello",
-  questions: { ok: { type: "boolean", instructions: "OK?" } },
-  options: { temperature: 0.5 },
-})
-// @ts-expect-error Selected evaluation models retain their request option types.
-Evaluation.evaluate({
-  model: custom,
-  state: "hello",
-  questions: { ok: { type: "boolean", instructions: "OK?" } },
-  options: { temperature: "high" },
-})
@@ -8,11 +8,9 @@ import {
  CloudflareWorkersAI,
  DeepSeek,
  Fireworks,
-  OpenCodeZen,
  OpenAI,
  OpenAICompatible,
  OpenRouter,
-  TypeSafeAI,
  XAI,
 } from "@opencode/ai/providers"
 import {
@@ -25,7 +23,6 @@ import {
 } from "@opencode/ai/protocols"
 import * as AnthropicMessages from "@opencode/ai/protocols/anthropic-messages"
 import { TestLLM } from "@opencode/ai/testing"
-import { Evaluation, EvaluationClient } from "@opencode/ai/experimental"

 describe("public exports", () => {
  test("root exposes app-facing runtime APIs", () => {
@@ -40,9 +37,6 @@ describe("public exports", () => {
    expect(TestLLM.layer).toBeFunction()
    expect(TestLLM.testLayer).toBeFunction()
    expect(TestLLM.Test.of).toBeFunction()
-    expect(Evaluation.evaluate).toBeFunction()
-    expect(EvaluationClient.layer).toBeDefined()
-    expect(EvaluationClient.fetchLayer).toBeDefined()
  })

  test("route barrel exposes route-authoring APIs", () => {
@@ -72,8 +66,6 @@ describe("public exports", () => {
    expect(CloudflareWorkersAI.configure).toBeFunction()
    expect(CloudflareWorkersAI.configure({ accountId: "fixture", apiKey: "fixture" }).model).toBeFunction()
    expect(OpenRouter.model).toBeFunction()
-    expect(TypeSafeAI.experimental.evaluation).toBeFunction()
-    expect(OpenCodeZen.experimental.evaluation).toBeFunction()
    expect(XAI.model).toBeFunction()
    expect(XAI.provider.responses).toBe(XAI.responses)
    expect(XAI.provider.chat).toBe(XAI.chat)
@@ -1,13 +1,9 @@
 {
  "version": 1,
  "metadata": {
-    "tags": [
-      "prefix:google-vertex",
-      "provider:google-vertex",
-      "protocol:gemini"
-    ],
+    "tags": ["prefix:google-vertex", "provider:google-vertex", "protocol:gemini"],
    "name": "google-vertex/calls-a-tool",
-    "recordedAt": "2026-09-22T03:46:29.725Z"
+    "recordedAt": "2026-08-23T17:21:51.036Z"
  },
  "interactions": [
    {
@@ -25,7 +21,7 @@
        "headers": {
          "content-type": "text/event-stream"
        },
-        "body": "data: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"functionCall\": {\"name\": \"lookup_weather\",\"args\": {\"city\": \"Paris\"},\"id\": \"call_28936\"},\"thoughtSignature\": \"AY89a1/MVeBxtwu9l/96clFobOrrd7Q5MTf5o8/A22fc++1EsFYVeCFx9WCGmJ+D3yW3FWlRXKtJECYfprSoxixCSOYBNiV9g8/IkejbAxF26k1vxTsHkoqts0O2s8GqqBSRAavJfKQ/taTRbPuIq+b+RKZ8SDJFoWDnFjXpdS5S164uJTjmgs4ALd8oB1oQRycMsTbAY51TmkcNUnhARpjKQfqiizz4KfSRFjx7xDnza0v4jj73m2GV86eLDhVT7trIT+Dl5DsJt6RBLOE2Amse54mcpIbsYaANlY1YDU6FKuUBqnuwpl0OfhMXwWuYMogv1tH/0rTXsqNwmHyt/b9ZZXqYCdFXpMGt8udmoZ0d\"}]}}],\"usageMetadata\": {\"trafficType\": \"ON_DEMAND\"},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-09-22T03:46:28.953809Z\",\"responseId\": \"FPqxatGbOsSorb8PtY2z8Q4\"}\r\n\r\ndata: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"\"}]},\"finishReason\": \"STOP\"}],\"usageMetadata\": {\"promptTokenCount\": 39,\"candidatesTokenCount\": 16,\"totalTokenCount\": 93,\"trafficType\": \"ON_DEMAND\",\"promptTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 39}],\"candidatesTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 16}],\"thoughtsTokenCount\": 38},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-09-22T03:46:28.953809Z\",\"responseId\": \"FPqxatGbOsSorb8PtY2z8Q4\"}\r\n\r\n"
+        "body": "data: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"functionCall\": {\"name\": \"lookup_weather\",\"args\": {\"city\": \"Paris\"},\"id\": \"call_425130\"},\"thoughtSignature\": \"AY89a1+1fXnLgYhHMuN3Ak6LBhT6PcrYOW7iPav4LfsacvG/Z6l1yJ+AsU7vWhFj/JyPIbsJJQ+GjohM9sCIZ6nqUOIg3reo/7osmrCvFrVHedTHQcwiPzoz2Kp3gb+uWjFAXxk1EX4IRAKcu0ox1W/Z9PpuZvHkTerGO2a82e02N6MAF1YhhtbXFvSdqLRih2Os68rdOk5/Bcld7ol8qUgeyIZ3CtI3OJ5jwRcD8LjvK33A7ZFzH5Bxp/peUmXvqnu5iNhnGBxZaJy/vupCtxRZxjaS+ojG0/UhyrnRiKIpbzQ0FBkxePPn8GCX/LOe2y3GUc98co8lN8OOuCd9ZmEdx5AjHmQkPO9fAV9SxG6Bda6SDWVL8o/Uz3WSQYoUEfAdoajEWIBvcisoeCJjb7zgmRRZ9VQSPl3RXj5LFRvX8jn0YKV1CahYbc24jA==\"}]}}],\"usageMetadata\": {\"trafficType\": \"ON_DEMAND\"},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-08-23T17:21:50.308576Z\",\"responseId\": \"LiyLauDqErCErb8Pj8aWkAs\"}\r\n\r\ndata: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"\"}]},\"finishReason\": \"STOP\"}],\"usageMetadata\": {\"promptTokenCount\": 39,\"candidatesTokenCount\": 16,\"totalTokenCount\": 102,\"trafficType\": \"ON_DEMAND\",\"promptTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 39}],\"candidatesTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 16}],\"thoughtsTokenCount\": 47},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-08-23T17:21:50.308576Z\",\"responseId\": \"LiyLauDqErCErb8Pj8aWkAs\"}\r\n\r\n"
      }
    }
  ]
@@ -1,13 +1,9 @@
 {
  "version": 1,
  "metadata": {
-    "tags": [
-      "prefix:google-vertex",
-      "provider:google-vertex",
-      "protocol:gemini"
-    ],
+    "tags": ["prefix:google-vertex", "provider:google-vertex", "protocol:gemini"],
    "name": "google-vertex/continues-after-a-tool-result",
-    "recordedAt": "2026-09-22T03:46:30.691Z"
+    "recordedAt": "2026-08-23T17:21:51.853Z"
  },
  "interactions": [
    {
@@ -18,14 +14,14 @@
        "headers": {
          "content-type": "application/json"
        },
-        "body": "{\"contents\":[{\"role\":\"user\",\"parts\":[{\"text\":\"What is the weather in Paris?\"}]},{\"role\":\"model\",\"parts\":[{\"functionCall\":{\"id\":\"call_paris_1\",\"name\":\"lookup_weather\",\"args\":{\"city\":\"Paris\"}},\"thoughtSignature\":\"skip_thought_signature_validator\"}]},{\"role\":\"user\",\"parts\":[{\"functionResponse\":{\"id\":\"call_paris_1\",\"name\":\"lookup_weather\",\"response\":{\"name\":\"lookup_weather\",\"content\":\"18C, light rain\"}}}]}],\"tools\":[{\"functionDeclarations\":[{\"name\":\"lookup_weather\",\"description\":\"Look up the current weather for a city\",\"parameters\":{\"required\":[\"city\"],\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}}}}]}]}"
+        "body": "{\"contents\":[{\"role\":\"user\",\"parts\":[{\"text\":\"What is the weather in Paris?\"}]},{\"role\":\"model\",\"parts\":[{\"functionCall\":{\"name\":\"lookup_weather\",\"args\":{\"city\":\"Paris\"}},\"thoughtSignature\":\"skip_thought_signature_validator\"}]},{\"role\":\"user\",\"parts\":[{\"functionResponse\":{\"name\":\"lookup_weather\",\"response\":{\"name\":\"lookup_weather\",\"content\":\"18C, light rain\"}}}]}],\"tools\":[{\"functionDeclarations\":[{\"name\":\"lookup_weather\",\"description\":\"Look up the current weather for a city\",\"parameters\":{\"required\":[\"city\"],\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}}}}]}]}"
      },
      "response": {
        "status": 200,
        "headers": {
          "content-type": "text/event-stream"
        },
-        "body": "data: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"The weather\"}]}}],\"usageMetadata\": {\"trafficType\": \"ON_DEMAND\"},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-09-22T03:46:29.830958Z\",\"responseId\": \"Ffqxau7bMoCOrb8P_Iu5sA0\"}\r\n\r\ndata: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \" in Paris is currently 18°C with light rain.\"}]}}],\"usageMetadata\": {\"trafficType\": \"ON_DEMAND\"},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-09-22T03:46:29.830958Z\",\"responseId\": \"Ffqxau7bMoCOrb8P_Iu5sA0\"}\r\n\r\ndata: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"\",\"thoughtSignature\": \"AY89a18aVI8Uxr2VaOI822u0DyuQdy4B00uhLnjqYb5Qb6Mkscccm018knLtYThB5UX8dRv1VFsORSQ0Qo6Gx9RCng2AK9EPce7p\"}]},\"finishReason\": \"STOP\"}],\"usageMetadata\": {\"promptTokenCount\": 59,\"candidatesTokenCount\": 15,\"totalTokenCount\": 74,\"trafficType\": \"ON_DEMAND\",\"promptTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 59}],\"candidatesTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 15}]},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-09-22T03:46:29.830958Z\",\"responseId\": \"Ffqxau7bMoCOrb8P_Iu5sA0\"}\r\n\r\n"
+        "body": "data: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"The weather in Paris is currently 18°C with light rain.\"}]}}],\"usageMetadata\": {\"trafficType\": \"ON_DEMAND\"},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-08-23T17:21:51.220919Z\",\"responseId\": \"LyyLave9DbWnrb8P1IjLmQQ\"}\r\n\r\ndata: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"\",\"thoughtSignature\": \"AY89a197c+fpHJftPtcufnqMAyoRQKVEQK+KeG+RVHVx2wKil3L4jP4YWvfVbcuOFr2jio4Kre/hCrDANAoMFSvaZrdaPeo1b5bXQSmJKMH03yM5M6q6ME6JiBvXym143U4exIde4UbOh2tMeyXMvB3aWxcavIHd78g5G5QPLreo6A3LO5871cYYVeRwteY+/zbEdqfaAq1hlk6WYpWkNljYpjMyKwr15YC8rFLh3HYayS9tTN++GGrk/reZn6C3OEPlzPou/pXRATzcEAGVl/TW\"}]},\"finishReason\": \"STOP\"}],\"usageMetadata\": {\"promptTokenCount\": 59,\"candidatesTokenCount\": 15,\"totalTokenCount\": 98,\"trafficType\": \"ON_DEMAND\",\"promptTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 59}],\"candidatesTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 15}],\"thoughtsTokenCount\": 24},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-08-23T17:21:51.220919Z\",\"responseId\": \"LyyLave9DbWnrb8P1IjLmQQ\"}\r\n\r\n"
      }
    }
  ]
@@ -1,13 +1,9 @@
 {
  "version": 1,
  "metadata": {
-    "tags": [
-      "prefix:google-vertex",
-      "provider:google-vertex",
-      "protocol:gemini"
-    ],
+    "tags": ["prefix:google-vertex", "provider:google-vertex", "protocol:gemini"],
    "name": "google-vertex/streams-text",
-    "recordedAt": "2026-09-22T03:46:28.840Z"
+    "recordedAt": "2026-08-23T17:21:50.112Z"
  },
  "interactions": [
    {
@@ -25,7 +21,7 @@
        "headers": {
          "content-type": "text/event-stream"
        },
-        "body": "data: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"Hello\"}]}}],\"usageMetadata\": {\"trafficType\": \"ON_DEMAND\"},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-09-22T03:46:26.748531Z\",\"responseId\": \"EvqxavPXLbqerb8P1eSViQs\"}\r\n\r\ndata: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"\",\"thoughtSignature\": \"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\"}]},\"finishReason\": \"STOP\"}],\"usageMetadata\": {\"promptTokenCount\": 7,\"candidatesTokenCount\": 1,\"totalTokenCount\": 285,\"trafficType\": \"ON_DEMAND\",\"promptTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 7}],\"candidatesTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 1}],\"thoughtsTokenCount\": 277},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-09-22T03:46:26.748531Z\",\"responseId\": \"EvqxavPXLbqerb8P1eSViQs\"}\r\n\r\n"
+        "body": "data: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"Hello\"}]}}],\"usageMetadata\": {\"trafficType\": \"ON_DEMAND\"},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-08-23T17:21:48.528714Z\",\"responseId\": \"LCyLasqiIO6crb8P1sDboQc\"}\r\n\r\ndata: {\"candidates\": [{\"content\": {\"role\": \"model\",\"parts\": [{\"text\": \"\",\"thoughtSignature\": \"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\"}]},\"finishReason\": \"STOP\"}],\"usageMetadata\": {\"promptTokenCount\": 7,\"candidatesTokenCount\": 1,\"totalTokenCount\": 150,\"trafficType\": \"ON_DEMAND\",\"promptTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 7}],\"candidatesTokensDetails\": [{\"modality\": \"TEXT\",\"tokenCount\": 1}],\"thoughtsTokenCount\": 142},\"modelVersion\": \"gemini-3.5-flash\",\"createTime\": \"2026-08-23T17:21:48.528714Z\",\"responseId\": \"LCyLasqiIO6crb8P1sDboQc\"}\r\n\r\n"
      }
    }
  ]
@@ -1,33 +0,0 @@
-{
-  "version": 1,
-  "metadata": {
-    "model": "jev-1.13-free",
-    "tags": [
-      "prefix:opencode-zen-evaluation",
-      "provider:opencode",
-      "protocol:system-one"
-    ],
-    "name": "opencode-zen-evaluation/evaluates-choice-score-and-boolean-questions",
-    "recordedAt": "2026-09-22T03:44:57.511Z"
-  },
-  "interactions": [
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://opencode.ai/zen/v1/systemone",
-        "headers": {
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"jev-1.13-free\",\"state\":\"I was charged twice for the same invoice. Please refund the duplicate payment today.\",\"questions\":{\"department\":{\"type\":\"choice\",\"instructions\":\"Which team should handle this support request?\",\"criteria\":{\"billing\":\"Payments, invoices, refunds, or failed charges\",\"technical\":\"Bugs, outages, or integrations\",\"sales\":\"Pricing, upgrades, or new accounts\"}},\"urgency\":{\"type\":\"score\",\"instructions\":\"How urgent is this support request?\",\"criteria\":[\"Can wait for normal support\",\"Needs prompt attention\",\"Actively blocking revenue\"]},\"refund\":{\"type\":\"noul\",\"instructions\":\"Is the customer asking for a refund?\"}}}"
-      },
-      "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"jev-1.13-free\",\"answers\":{\"department\":{\"type\":\"choice\",\"choice\":\"billing\",\"confidence\":1,\"probabilities\":{\"technical\":0,\"sales\":0,\"billing\":1}},\"urgency\":{\"type\":\"score\",\"score\":1.02,\"confidence\":0.95,\"legend\":{\"0\":\"Can wait for normal support\",\"1\":\"Needs prompt attention\",\"2\":\"Actively blocking revenue\"},\"probabilities\":{\"0\":0,\"1\":0.97,\"2\":0.03}},\"refund\":{\"type\":\"noul\",\"noul\":0.99}},\"usage\":{\"input_tokens\":422,\"output_tokens\":69}}"
-      }
-    }
-  ]
-}
@@ -1,33 +0,0 @@
-{
-  "version": 1,
-  "metadata": {
-    "model": "jev-latest",
-    "tags": [
-      "prefix:typesafe-evaluation",
-      "provider:typesafe-ai",
-      "protocol:system-one"
-    ],
-    "name": "typesafe-evaluation/evaluates-choice-score-and-boolean-questions",
-    "recordedAt": "2026-09-22T03:44:28.626Z"
-  },
-  "interactions": [
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://api.typesafe.ai/v1/systemone",
-        "headers": {
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"jev-latest\",\"state\":\"I was charged twice for the same invoice. Please refund the duplicate payment today.\",\"questions\":{\"department\":{\"type\":\"choice\",\"instructions\":\"Which team should handle this support request?\",\"criteria\":{\"billing\":\"Payments, invoices, refunds, or failed charges\",\"technical\":\"Bugs, outages, or integrations\",\"sales\":\"Pricing, upgrades, or new accounts\"}},\"urgency\":{\"type\":\"score\",\"instructions\":\"How urgent is this support request?\",\"criteria\":[\"Can wait for normal support\",\"Needs prompt attention\",\"Actively blocking revenue\"]},\"refund\":{\"type\":\"noul\",\"instructions\":\"Is the customer asking for a refund?\"}}}"
-      },
-      "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"jev-1.13.0\",\"answers\":{\"department\":{\"type\":\"choice\",\"choice\":\"billing\",\"confidence\":1.0,\"probabilities\":{\"billing\":1.0,\"sales\":0.0,\"technical\":0.0}},\"urgency\":{\"type\":\"score\",\"score\":1.01,\"confidence\":0.97,\"legend\":{\"0\":\"Can wait for normal support\",\"1\":\"Needs prompt attention\",\"2\":\"Actively blocking revenue\"},\"probabilities\":{\"0\":0.0,\"1\":0.98,\"2\":0.02}},\"refund\":{\"type\":\"noul\",\"noul\":0.99}},\"usage\":{\"input_tokens\":422,\"output_tokens\":69}}"
-      }
-    }
-  ]
-}
@@ -1,79 +0,0 @@
-import { describe, expect } from "bun:test"
-import { Effect } from "effect"
-import { Evaluation } from "../../src/experimental.js"
-import { OpenCodeZen, TypeSafeAI } from "../../src/providers.js"
-import { recordedTests } from "../recorded-test.js"
-
-const questions = {
-  department: {
-    type: "choice",
-    instructions: "Which team should handle this support request?",
-    criteria: {
-      billing: "Payments, invoices, refunds, or failed charges",
-      technical: "Bugs, outages, or integrations",
-      sales: "Pricing, upgrades, or new accounts",
-    },
-  },
-  urgency: {
-    type: "score",
-    instructions: "How urgent is this support request?",
-    criteria: ["Can wait for normal support", "Needs prompt attention", "Actively blocking revenue"],
-  },
-  refund: { type: "boolean", instructions: "Is the customer asking for a refund?" },
-} as const
-
-const state = "I was charged twice for the same invoice. Please refund the duplicate payment today."
-
-const typesafe = recordedTests({
-  prefix: "typesafe-evaluation",
-  provider: "typesafe-ai",
-  protocol: "system-one",
-  requires: ["TYPESAFE_API_KEY"],
-  metadata: { model: "jev-latest" },
-})
-
-const zen = recordedTests({
-  prefix: "opencode-zen-evaluation",
-  provider: "opencode",
-  protocol: "system-one",
-  requires: ["OPENCODE_API_KEY"],
-  metadata: { model: "jev-1.13-free" },
-})
-
-describe("experimental Evaluation recorded", () => {
-  typesafe.effect("evaluates choice score and boolean questions", () =>
-    assertEvaluation(
-      TypeSafeAI.configure({ apiKey: process.env.TYPESAFE_API_KEY ?? "fixture" }).experimental.evaluation("jev-latest"),
-      "typesafe",
-    ),
-  )
-
-  zen.effect("evaluates choice score and boolean questions", () =>
-    assertEvaluation(
-      OpenCodeZen.configure({ apiKey: process.env.OPENCODE_API_KEY ?? "fixture" }).experimental.evaluation(
-        "jev-1.13-free",
-      ),
-      "opencode",
-    ),
-  )
-})
-
-const assertEvaluation = (
-  model: ReturnType<typeof TypeSafeAI.experimental.evaluation>,
-  metadataKey: "typesafe" | "opencode",
-) =>
-  Effect.gen(function* () {
-    const response = yield* Evaluation.evaluate({ model, state, questions })
-    expect(response.model).toStartWith("jev-")
-    expect(response.answers.department.type).toBe("choice")
-    expect(response.answers.department.choice).toBe("billing")
-    expect(response.answers.department.probabilities?.billing).toBeGreaterThan(0.5)
-    expect(response.answers.urgency.type).toBe("score")
-    expect(response.answers.urgency.score).toBeGreaterThanOrEqual(0)
-    expect(response.answers.urgency.score).toBeLessThanOrEqual(2)
-    expect(response.answers.refund.type).toBe("boolean")
-    expect(response.answers.refund.probability).toBeGreaterThan(0.5)
-    expect(response.usage?.inputTokens).toBeGreaterThan(0)
-    expect(response.usage?.outputTokens).toBeGreaterThan(0)
-    expect(response.providerMetadata?.[metadataKey]?.confidence).toBeDefined()
-  })
@@ -114,7 +114,7 @@ describe("Google Vertex providers", () => {
    }),
  )

-  it.effect("preserves function call ids in lowered Vertex bodies", () =>
+  it.effect("strips function call ids Vertex does not accept from lowered bodies", () =>
    Effect.gen(function* () {
      const prepared = yield* compileRequest(
        LLM.request({
@@ -142,14 +142,15 @@ describe("Google Vertex providers", () => {
        }),
      )

+      expect(JSON.stringify(prepared.body.contents)).not.toContain('"id"')
      expect(prepared.body.contents).toMatchObject([
-        { role: "model", parts: [{ functionCall: { id: "call_1", name: "lookup", args: { query: "weather" } } }] },
+        { role: "model", parts: [{ functionCall: { id: undefined, name: "lookup", args: { query: "weather" } } }] },
        {
          role: "user",
          parts: [
            {
              functionResponse: {
-                id: "call_1",
+                id: undefined,
                name: "lookup",
                response: { name: "lookup", content: "sunny" },
              },
@@ -234,23 +235,12 @@ describe("Google Vertex providers", () => {
          parts: [
            { text: "Thinking.", thought: true, thoughtSignature: "reasoning_sig" },
            { text: "Checking.", thoughtSignature: "text_sig" },
-            {
-              functionCall: { id: "provider_call_1", name: "lookup", args: { query: "weather" } },
-              thoughtSignature: "tool_sig",
-            },
+            { functionCall: { name: "lookup", args: { query: "weather" } }, thoughtSignature: "tool_sig" },
          ],
        },
        {
          role: "user",
-          parts: [
-            {
-              functionResponse: {
-                id: "provider_call_1",
-                name: "lookup",
-                response: { name: "lookup", content: "sunny" },
-              },
-            },
-          ],
+          parts: [{ functionResponse: { name: "lookup", response: { name: "lookup", content: "sunny" } } }],
        },
      ])
    }),
@@ -11,78 +11,66 @@ import { sseEvents } from "../lib/sse.js"

 const decodeEvent = Schema.decodeUnknownEffect(OpenResponses.protocol.stream.event)

-it.effect("decodes error frames verbatim in shared SSE and WebSocket decoding", () =>
+it.effect("normalizes flat errors in shared SSE and WebSocket decoding", () =>
  Effect.gen(function* () {
+    const frame = {
+      type: "error",
+      sequence_number: 4,
+      code: "server_shutting_down",
+      message: "Server is shutting down. Please retry your request.",
+      param: null,
+    }
    for (const decode of [decodeEvent, OpenResponses.decodeChannelEvent]) {
-      for (const frame of [
-        { type: "error", sequence_number: 4, code: "server_shutting_down", message: "Shutting down", param: null },
+      const event = yield* decode(JSON.stringify(frame))
+      expect(event).toEqual({
+        type: "error",
+        sequence_number: 4,
+        error: { code: frame.code, message: frame.message, param: null },
+      })
+
+      for (const unchanged of [
+        event,
        { type: "error" },
-        { type: "error", error: "Gateway failed" },
-        { type: "error", error: { code: 429, message: "slow down" } },
-        { type: "error", error: 42 },
-        { type: "error", code: 500, message: ["not", "a", "string"] },
-        { type: "response.failed", response: { id: "resp_failed", error: "Gateway failed" } },
-        { type: "response.failed", response: { id: "resp_failed", error: ["weird"] } },
        {
          type: "response.failed",
          response: { id: "resp_failed", error: { code: "server_error", message: "Internal server error" } },
        },
        { type: "response.output_text.delta", item_id: "msg_text", delta: "Hello" },
      ]) {
-        expect(yield* decode(JSON.stringify(frame))).toEqual(frame)
+        expect(yield* decode(JSON.stringify(unchanged))).toEqual(unchanged)
      }
    }
  }),
 )

-it.effect("reads bare WebSocket error envelopes as error events", () =>
+it.effect("continues to normalize untyped xAI WebSocket errors", () =>
  Effect.gen(function* () {
    const message = "gRPC error: Response with id=resp_missing not found"
-    for (const error of [{ type: "api_error", message }, message, 42]) {
-      expect(yield* OpenResponses.decodeChannelEvent(JSON.stringify({ error }))).toEqual({ type: "error", error })
-    }
-    for (const frame of [{ error: null }, { message }]) {
-      expect(yield* OpenResponses.decodeChannelEvent(JSON.stringify(frame)).pipe(Effect.flip)).toBeDefined()
+    for (const error of [{ type: "api_error", message }, message]) {
+      expect(yield* OpenResponses.decodeChannelEvent(JSON.stringify({ error }))).toEqual({
+        type: "error",
+        error: typeof error === "string" ? { message } : error,
+      })
    }
  }),
 )

-it.effect("extracts error details from every shape and falls back to the raw frame", () =>
+it.effect("normalizes string errors in shared SSE and WebSocket decoding", () =>
  Effect.gen(function* () {
-    const cases: Array<[frame: Record<string, unknown>, message: string, tag: string]> = [
-      [
-        { type: "error", code: "server_shutting_down", message: "Shutting down" },
-        "server_shutting_down: Shutting down",
-        "UnknownProvider",
-      ],
-      [{ type: "error", error: "Gateway failed" }, "Gateway failed", "UnknownProvider"],
-      [{ type: "error", error: { code: 429, message: "slow down" } }, "429: slow down", "UnknownProvider"],
-      [{ type: "error", error: { message: "slow down" }, status: 429 }, "slow down", "RateLimit"],
-      [{ type: "error", code: 500, message: ["not", "a", "string"] }, "500", "UnknownProvider"],
-      [
-        { type: "response.failed", response: { id: "resp_failed", error: "Gateway failed" } },
-        "Gateway failed",
-        "UnknownProvider",
-      ],
-    ]
-    for (const [frame, message, tag] of cases) {
-      const event = yield* OpenResponses.decodeChannelEvent(JSON.stringify(frame))
-      const error = OpenResponses.providerFailure(event, "fallback", JSON.stringify(frame))
-      expect(error.message).toBe(message)
-      expect(error.reason._tag).toBe(tag)
-      expect(error.reason.body).toBe(JSON.stringify(frame))
+    for (const decode of [decodeEvent, OpenResponses.decodeChannelEvent]) {
+      expect(yield* decode(JSON.stringify({ type: "error", error: "Gateway failed" }))).toEqual({
+        type: "error",
+        error: { message: "Gateway failed" },
+      })
+      expect(
+        yield* decode(
+          JSON.stringify({ type: "response.failed", response: { id: "resp_failed", error: "Gateway failed" } }),
+        ),
+      ).toEqual({
+        type: "response.failed",
+        response: { id: "resp_failed", error: { message: "Gateway failed" } },
+      })
    }
-    for (const frame of [
-      { type: "error", error: 42 },
-      { type: "response.failed", response: { id: "resp_failed", error: ["weird"] } },
-    ]) {
-      const event = yield* OpenResponses.decodeChannelEvent(JSON.stringify(frame))
-      const error = OpenResponses.providerFailure(event, "fallback", JSON.stringify(frame))
-      expect(error.message).toBe(JSON.stringify(frame))
-      expect(error.reason._tag).toBe("UnknownProvider")
-    }
-    expect(OpenResponses.providerFailure({ type: "error" }, "fallback", "{}").message).toBe("fallback")
-    expect(OpenResponses.providerFailure({ type: "error" }, "fallback", "{}").reason._tag).toBe("ProviderInternal")
  }),
 )

@@ -6,8 +6,6 @@ import * as path from "node:path"
 import { fileURLToPath } from "node:url"
 import { LLMClient, RequestExecutor } from "../src/route.js"
 import { ImageClient } from "../src/image-client.js"
-import { EvaluationClient } from "../src/experimental/evaluation-client.js"
-import type { Service as EvaluationClientService } from "../src/experimental/evaluation-client.js"
 import type { Service as ImageClientService } from "../src/image-client.js"
 import type { Service as LLMClientService } from "../src/route/client.js"
 import type { Service as RequestExecutorService } from "../src/route/executor.js"
@@ -20,12 +18,7 @@ import {
 const __dirname = path.dirname(fileURLToPath(import.meta.url))
 const FIXTURES_DIR = path.resolve(__dirname, "fixtures", "recordings")

-type RecordedEnv =
-  | RequestExecutorService
-  | LLMClientService
-  | ImageClientService
-  | EvaluationClientService
-  | Socket.WebSocketConstructor
+type RecordedEnv = RequestExecutorService | LLMClientService | ImageClientService | Socket.WebSocketConstructor

 type RecordedTestsOptions = RecordedGroupOptions & {
  readonly options?: HttpRecorder.RecorderOptions
@@ -99,7 +92,6 @@ export const recordedTests = (options: RecordedTestsOptions) =>
        requestExecutor,
        LLMClient.layer.pipe(Layer.provide(requestExecutor)),
        ImageClient.layer.pipe(Layer.provide(requestExecutor)),
-        EvaluationClient.layer.pipe(Layer.provide(requestExecutor)),
        webSocket,
      )
    },
@@ -19,13 +19,6 @@ export function mountBrowserPane() {
      session: "Alpha",
      mounted: true,
      visible: true,
-      url: undefined as string | undefined,
-      loading: false,
-      generation: 0,
-      delayNavigation: false,
-      pendingURL: undefined as string | undefined,
-      loadErrors: {} as Record<string, string | undefined>,
-      error: undefined as string | undefined,
      layouts: {} as Record<string, BrowserPaneLayout | undefined>,
    })
    const tabs = ["Alpha", "Beta"].map((name) => ({
@@ -54,33 +47,13 @@ export function mountBrowserPane() {
      opened: () => !!registrations.get(store.session),
      state: () => ({ tabs: tabs.filter((tab) => tab.title === store.session), focusedTabID: null }),
      tabs: () => tabs.filter((tab) => tab.title === store.session),
-      active: () => {
-        const tab = tabs.find((tab) => tab.title === store.session) ?? tabs[0]
-        return {
-          ...tab,
-          url: store.url ?? tab.url,
-          loading: store.loading,
-          generation: store.generation,
-          loadError: store.loadErrors[store.session],
-        }
-      },
+      active: () => tabs.find((tab) => tab.title === store.session) ?? tabs[0],
      registration: () => registrations.get(store.session),
-      error: () => store.error ?? (store.loadErrors[store.session] ? "Request failed" : undefined),
+      error: () => undefined,
      suspended: () => false,
      close: () => undefined,
      open: () => undefined,
-      command: (command) => {
-        setStore("error", undefined)
-        if (command.type === "navigate" || command.type === "reload") setStore("loadErrors", store.session, undefined)
-        if (command.type === "navigate") {
-          if (store.delayNavigation) {
-            setStore("pendingURL", command.url)
-            return
-          }
-          setStore({ url: command.url, loading: false, generation: store.generation + 1 })
-        }
-        if (command.type === "stop") setStore("loading", false)
-      },
+      command: () => undefined,
    }
    return (
      <>
@@ -91,32 +64,6 @@ export function mountBrowserPane() {
            {(name) => <button onClick={() => setStore({ session: name, mounted: name !== "Empty" })}>{name}</button>}
          </For>
          <button onClick={() => setStore("mounted", false)}>Unmount pane</button>
-          <button onClick={() => setStore({ url: "about:blank", loading: false })}>Blank page</button>
-          <button onClick={() => setStore({ url: "about:blank", loading: true })}>Loading page</button>
-          <button
-            onClick={() =>
-              setStore({ loading: true, generation: store.generation + 1, loadErrors: { [store.session]: undefined } })
-            }
-          >
-            Load current page
-          </button>
-          <button onClick={() => setStore("loadErrors", store.session, "ERR_CONNECTION_REFUSED")}>Failed page</button>
-          <button onClick={() => setStore("delayNavigation", true)}>Delay navigation</button>
-          <button onClick={() => setStore({ error: "ERR_BLOCKED_BY_CLIENT", pendingURL: undefined })}>
-            Block navigation
-          </button>
-          <button
-            onClick={() =>
-              setStore({
-                url: store.pendingURL,
-                pendingURL: undefined,
-                loading: false,
-                generation: store.generation + 1,
-              })
-            }
-          >
-            Complete navigation
-          </button>
          <button onClick={() => setStore("visible", (visible) => !visible)}>Toggle Review tab</button>
        </nav>
        <div style={{ width: "640px", height: "360px", border: "1px solid #555" }}>
@@ -57,153 +57,3 @@ story("hides the native view immediately while the pane stays mounted", async ({
  await toggle.click()
  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
 })
-
-story("shows the empty state over a blank native page and restores navigation", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  await root.getByRole("button", { name: "Blank page", exact: true }).click()
-  await expect(root.getByText("Enter URL", { exact: true })).toBeVisible()
-  await expect(root.getByText('Or prompt "Open in the app browser"', { exact: true })).toBeVisible()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "false")
-  await expect(root.getByRole("button", { name: "Reload", exact: true })).toBeDisabled()
-
-  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.fill("https://example.com/")
-  await expect(root.getByText("Enter URL", { exact: true })).toBeVisible()
-  await address.press("Enter")
-  await expect(address).not.toBeFocused()
-  await expect(root.getByText("Enter URL", { exact: true })).toBeHidden()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-  await expect(root.getByRole("button", { name: "Reload", exact: true })).toBeEnabled()
-})
-
-story("keeps Stop available and hides the empty state while a blank page loads", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  await root.getByRole("button", { name: "Loading page", exact: true }).click()
-  await expect(root.getByText("Enter URL", { exact: true })).toBeHidden()
-  await root.getByRole("button", { name: "Stop", exact: true }).click()
-  await expect(root.getByText("Enter URL", { exact: true })).toBeVisible()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "false")
-})
-
-story("keeps the submitted URL visible until the browser reports navigation", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  await root.getByRole("button", { name: "Blank page", exact: true }).click()
-  await root.getByRole("button", { name: "Delay navigation", exact: true }).click()
-  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.fill("https://example.com/")
-  await address.press("Enter")
-  await expect(address).not.toBeFocused()
-  await expect(address).toHaveValue("https://example.com/")
-  await expect(root.getByText("Enter URL", { exact: true })).toBeHidden()
-
-  await root.getByRole("button", { name: "Complete navigation", exact: true }).click()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-  await expect(address).toHaveValue("https://example.com/")
-
-  await address.fill("https://unsubmitted.example/")
-  await root.getByRole("button", { name: "Delay navigation", exact: true }).click()
-  await expect(address).toHaveValue("https://example.com/")
-})
-
-story("restores the current URL when a submitted navigation is blocked", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  await root.getByRole("button", { name: "Delay navigation", exact: true }).click()
-  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.fill("https://blocked.example/")
-  await address.press("Enter")
-  await expect(address).toHaveValue("https://blocked.example/")
-  await root.getByRole("button", { name: "Block navigation", exact: true }).click()
-  await expect(root.getByText("ERR_BLOCKED_BY_CLIENT", { exact: true })).toBeVisible()
-  await expect(address).toHaveValue("https://alpha.example/")
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-})
-
-story("shows a themed failure state for only the failed tab and allows retry", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  await root.getByRole("button", { name: "Failed page", exact: true }).click()
-  await expect(root.getByText("URL can't be reached", { exact: true })).toBeVisible()
-  await expect(root.getByText("Check the URL and your connection, then try again.", { exact: true })).toBeVisible()
-  await expect(root.getByText("Request failed", { exact: true })).toBeHidden()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "false")
-  await expect(root.getByRole("textbox", { name: "Browser address", exact: true })).toHaveValue(
-    "https://alpha.example/",
-  )
-
-  await root.getByRole("button", { name: "Beta", exact: true }).click()
-  await expect(root.getByText("URL can't be reached", { exact: true })).toBeHidden()
-  await expect(root.getByTestId("native-Beta")).toHaveAttribute("data-visible", "true")
-  await root.getByRole("button", { name: "Alpha", exact: true }).click()
-  await expect(root.getByText("URL can't be reached", { exact: true })).toBeVisible()
-
-  await root.getByRole("button", { name: "Reload", exact: true }).click()
-  await expect(root.getByText("URL can't be reached", { exact: true })).toBeHidden()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-})
-
-story("returns a failed tab to the empty state when an empty URL is submitted", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  await root.getByRole("button", { name: "Failed page", exact: true }).click()
-  await expect(root.getByText("URL can't be reached", { exact: true })).toBeVisible()
-  await root.getByRole("button", { name: "Delay navigation", exact: true }).click()
-
-  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.fill("")
-  await address.press("Enter")
-  await expect(address).not.toBeFocused()
-  await expect(address).toHaveValue("")
-  await root.getByRole("button", { name: "Load current page", exact: true }).click()
-  await expect(root.getByRole("button", { name: "Stop", exact: true })).toBeEnabled()
-  await root.getByRole("button", { name: "Complete navigation", exact: true }).click()
-  await expect(root.getByText("URL can't be reached", { exact: true })).toBeHidden()
-  await expect(root.getByText("Enter URL", { exact: true })).toBeVisible()
-  await expect(root.getByRole("button", { name: "Reload", exact: true })).toBeDisabled()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "false")
-})
-
-story("selects the full URL when the address field gains focus", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.click()
-  await expect(address).toHaveJSProperty("selectionStart", 0)
-  await expect(address).toHaveJSProperty("selectionEnd", "https://alpha.example/".length)
-  await address.pressSequentially("https://example.com/")
-  await expect(address).toHaveValue("https://example.com/")
-  await address.press("Enter")
-  await expect(address).not.toBeFocused()
-  await address.focus()
-  await expect(address).toHaveJSProperty("selectionStart", 0)
-  await expect(address).toHaveJSProperty("selectionEnd", "https://example.com/".length)
-  await address.press("ArrowRight")
-  await address.click()
-  await expect(address).toHaveJSProperty("selectionStart", 0)
-  await expect(address).toHaveJSProperty("selectionEnd", "https://example.com/".length)
-})
-
-story("keeps the current page visible while a submitted URL loads", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  await root.getByRole("button", { name: "Delay navigation", exact: true }).click()
-  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.fill("https://example.com/")
-  await address.press("Enter")
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-  await expect(address).toHaveValue("https://example.com/")
-
-  await root.getByRole("button", { name: "Load current page", exact: true }).click()
-  await expect(root.getByRole("button", { name: "Stop", exact: true })).toBeEnabled()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-  await root.getByRole("button", { name: "Complete navigation", exact: true }).click()
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-  await expect(address).toHaveValue("https://example.com/")
-})
-
-story("keeps the current page and restores its URL when an empty address is submitted", async ({ page }) => {
-  const root = page.getByTestId("browser-pane-fixture")
-  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.fill("")
-  await address.press("Enter")
-  await expect(address).not.toBeFocused()
-  await expect(address).toHaveValue("https://alpha.example/")
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
-  await expect(root.getByText("Enter URL", { exact: true })).toBeHidden()
-  await expect(root.getByRole("button", { name: "Reload", exact: true })).toBeEnabled()
-})
@@ -17,12 +17,14 @@ const milestones = [
  "electronSpawnStarted",
  "debugEndpointReady",
  "electronStarted",
-  "layersReady",
-  "windowVisible",
  "serviceEnsureStarted",
  "serviceSpawnRequested",
  "serviceReady",
+  "backgroundLoadingReady",
  "rendererViteConnected",
+  "rendererInitializationStarted",
+  "rendererInitializationReady",
+  "windowVisible",
  "homeReady",
 ] as const
 const phases = [
@@ -126,12 +128,14 @@ const milestonePatterns: ReadonlyArray<{ name: Milestone; text: string }> = [
  { name: "electronSpawnStarted", text: "starting electron app..." },
  { name: "debugEndpointReady", text: "DevTools listening on ws://" },
  { name: "electronStarted", text: "app starting" },
-  { name: "layersReady", text: "layers ready" },
-  { name: "windowVisible", text: "main window visible" },
  { name: "serviceEnsureStarted", text: "starting v2 background service" },
  { name: "serviceSpawnRequested", text: "v2 CLI background service starting" },
  { name: "serviceReady", text: "v2 CLI background service ready" },
+  { name: "backgroundLoadingReady", text: "loading task finished" },
  { name: "rendererViteConnected", text: "[vite] connected." },
+  { name: "rendererInitializationStarted", text: "awaiting server ready" },
+  { name: "rendererInitializationReady", text: "server ready" },
+  { name: "windowVisible", text: "main window visible" },
 ]

 async function createColdProfile() {
@@ -400,12 +404,14 @@ function requireMilestones(observed: Partial<Record<Milestone, number>>) {
    electronSpawnStarted: get("electronSpawnStarted"),
    debugEndpointReady: get("debugEndpointReady"),
    electronStarted: get("electronStarted"),
-    layersReady: get("layersReady"),
-    windowVisible: get("windowVisible"),
    serviceEnsureStarted: get("serviceEnsureStarted"),
    serviceSpawnRequested: get("serviceSpawnRequested"),
    serviceReady: get("serviceReady"),
+    backgroundLoadingReady: get("backgroundLoadingReady"),
    rendererViteConnected: get("rendererViteConnected"),
+    rendererInitializationStarted: get("rendererInitializationStarted"),
+    rendererInitializationReady: get("rendererInitializationReady"),
+    windowVisible: get("windowVisible"),
    homeReady: get("homeReady"),
  }
 }
@@ -703,7 +703,7 @@ function messageContent(
    return {
      type: "reasoning",
      text: part.text,
-      native: jsonRecord(part.metadata),
+      state: jsonRecord(part.metadata),
      time: part.time
        ? { created: part.time.start, ...(part.time.end === undefined ? {} : { completed: part.time.end }) }
        : undefined,
@@ -20,12 +20,14 @@ describe("desktop startup benchmark", () => {
      ["electronSpawnStarted", "starting electron app..."],
      ["debugEndpointReady", "DevTools listening on ws://"],
      ["electronStarted", "app starting"],
-      ["layersReady", "layers ready"],
-      ["windowVisible", "main window visible"],
      ["serviceEnsureStarted", "starting v2 background service"],
      ["serviceSpawnRequested", "v2 CLI background service starting"],
      ["serviceReady", "v2 CLI background service ready"],
+      ["backgroundLoadingReady", "loading task finished"],
      ["rendererViteConnected", "[vite] connected."],
+      ["rendererInitializationStarted", "awaiting server ready"],
+      ["rendererInitializationReady", "server ready"],
+      ["windowVisible", "main window visible"],
    ] as const
    cases.forEach(([milestone, line]) => {
      expect(milestoneForLine(`\u001b[32m${line}\u001b[39m`)).toBe(milestone)
@@ -56,12 +58,14 @@ function sample(run: number, commandToHomeReadyMs: number): DesktopStartupSample
    electronSpawnStarted: 7,
    debugEndpointReady: 8,
    electronStarted: 9,
-    layersReady: 10,
-    windowVisible: 11,
-    serviceEnsureStarted: 12,
-    serviceSpawnRequested: 13,
-    serviceReady: 14,
-    rendererViteConnected: 15,
+    serviceEnsureStarted: 10,
+    serviceSpawnRequested: 11,
+    serviceReady: 12,
+    backgroundLoadingReady: 13,
+    rendererViteConnected: 14,
+    rendererInitializationStarted: 15,
+    rendererInitializationReady: 16,
+    windowVisible: 17,
    homeReady: commandToHomeReadyMs,
  }
  return {
@@ -76,8 +80,8 @@ function sample(run: number, commandToHomeReadyMs: number): DesktopStartupSample
      electronStartup: 2,
      serviceSpawnWait: 1,
      serviceProcessStartup: 1,
-      rendererStartup: commandToHomeReadyMs - 15,
-      visibleWindowToHome: commandToHomeReadyMs - 11,
+      rendererStartup: commandToHomeReadyMs - 14,
+      visibleWindowToHome: commandToHomeReadyMs - 17,
    },
    service: { version: "2.0.0-local-test", url: "http://127.0.0.1:3000", pid: run },
  }
@@ -1,110 +0,0 @@
-import { expect, test, type Locator, type Page } from "@playwright/test"
-import { fixture, pageMessages } from "../smoke/session-timeline.fixture"
-import { mockOpenCodeServer } from "../utils/mock-server"
-
-test.use({ viewport: { width: 390, height: 844 }, hasTouch: true, isMobile: true })
-
-test.beforeEach(async ({ page }) => {
-  await mockOpenCodeServer(page, {
-    sessions: fixture.sessions,
-    provider: fixture.provider,
-    directory: fixture.directory,
-    project: fixture.project,
-    pageMessages,
-  })
-  await page.addInitScript(
-    ({ directory, server, sessions }) => {
-      localStorage.setItem(
-        "opencode.global.dat:server",
-        JSON.stringify({ projects: { local: [{ worktree: directory, expanded: true }] } }),
-      )
-      localStorage.setItem(
-        "opencode.window.browser.dat:tabs",
-        JSON.stringify(sessions.map((session) => ({ type: "session", server, sessionId: session.id }))),
-      )
-    },
-    { directory: fixture.directory, server: fixture.serverKey, sessions: fixture.sessions },
-  )
-  await page.goto("/")
-  await page.locator('[data-slot="mobile-tabs-trigger"]').click()
-  await expect(page.locator('[data-slot="mobile-tabs-drawer"]')).toBeVisible()
-  const drawer = page.locator('[data-slot="mobile-drawer-content"]')
-  await expect
-    .poll(() => drawer.evaluate((element) => new DOMMatrixReadOnly(getComputedStyle(element).transform).m42))
-    .toBe(0)
-  await expect(drawer).not.toHaveAttribute("data-transitioning")
-})
-
-test("reorders session tabs with touch", async ({ page }) => {
-  const tabs = page.locator('[data-slot="vertical-tabs"] a')
-  await expect(tabs).toContainText([fixture.expected.sourceTitle, fixture.expected.targetTitle])
-
-  const target = tabs.filter({ hasText: fixture.expected.targetTitle })
-  const source = tabs.filter({ hasText: fixture.expected.sourceTitle })
-  const targetBox = await target.boundingBox()
-  const sourceBox = await source.boundingBox()
-  expect(targetBox).not.toBeNull()
-  expect(sourceBox).not.toBeNull()
-
-  await touchDrag(page, source, {
-    from: { x: sourceBox!.x + sourceBox!.width / 2, y: sourceBox!.y + sourceBox!.height / 2 },
-    to: { x: targetBox!.x + targetBox!.width / 2, y: targetBox!.y + targetBox!.height / 2 },
-  })
-
-  await expect(tabs).toContainText([fixture.expected.targetTitle, fixture.expected.sourceTitle])
-})
-
-test("dismisses a touch context menu by tapping outside", async ({ page }) => {
-  const drawer = page.locator('[data-slot="mobile-tabs-drawer"]')
-  const tab = drawer.locator('[data-slot="tab-link"]').filter({ hasText: fixture.expected.sourceTitle })
-  const home = drawer.getByRole("button", { name: "Home", exact: true })
-  const homeBox = await home.boundingBox()
-  const box = await tab.boundingBox()
-  expect(homeBox).not.toBeNull()
-  expect(box).not.toBeNull()
-  const point = { x: box!.x + box!.width / 2, y: box!.y + box!.height / 2 }
-
-  await tab.dispatchEvent("pointerdown", {
-    pointerType: "touch",
-    pointerId: 1,
-    isPrimary: true,
-    clientX: point.x,
-    clientY: point.y,
-  })
-  const rename = page.getByRole("menuitem", { name: "Rename", exact: true })
-  await expect(rename).toBeVisible()
-  await expect(drawer).toBeVisible()
-  await tab.filter({ visible: true }).dispatchEvent("pointerup", {
-    pointerType: "touch",
-    pointerId: 1,
-    isPrimary: true,
-    clientX: point.x,
-    clientY: point.y,
-  })
-
-  await page.touchscreen.tap(homeBox!.x + homeBox!.width / 2, homeBox!.y + homeBox!.height / 2)
-  await expect(rename).toBeHidden()
-  await expect(drawer).toBeVisible()
-})
-
-async function touchDrag(
-  page: Page,
-  source: Locator,
-  input: { from: { x: number; y: number }; to: { x: number; y: number } },
-) {
-  const client = await page.context().newCDPSession(page)
-  await client.send("Input.dispatchTouchEvent", {
-    type: "touchStart",
-    touchPoints: [{ ...input.from, id: 1 }],
-  })
-  await client.send("Input.dispatchTouchEvent", {
-    type: "touchMove",
-    touchPoints: [{ x: (input.from.x + input.to.x) / 2, y: (input.from.y + input.to.y) / 2, id: 1 }],
-  })
-  await expect(source).toHaveCount(2)
-  await client.send("Input.dispatchTouchEvent", {
-    type: "touchMove",
-    touchPoints: [{ ...input.to, id: 1 }],
-  })
-  await client.send("Input.dispatchTouchEvent", { type: "touchEnd", touchPoints: [] })
-}
@@ -71,7 +71,7 @@ for (const direction of ["ltr", "rtl"] as const) {
    const shifted = await content.evaluate((element) => getComputedStyle(element).translate)
    await content.evaluate((element) => element.setAttribute("data-summary-motion", ""))
    // Keep issuing resize events before the idle timer expires, including crossing the width cutoff.
-    for (const width of [1520, 1280, 1800]) {
+    for (const width of [1520, 1280, 1600]) {
      await page.setViewportSize({ width, height: 900 })
      await expect(panel).toHaveAttribute("data-summary-resizing", "true")
      await page.clock.runFor(100)
@@ -84,7 +84,6 @@ for (const direction of ["ltr", "rtl"] as const) {
    await expect(content).toHaveAttribute("data-summary-motion", "transitionrun,transitionend,")
    await expect(content).not.toHaveCSS("translate", shifted)
    await page.setViewportSize({ width: 1440, height: 900 })
-    await expect(panel).toHaveAttribute("data-summary-resizing", "false")
    await expect(content).toHaveCSS("translate", shifted)

    await content.evaluate((element) => element.setAttribute("data-summary-motion", ""))
@@ -113,8 +112,7 @@ for (const direction of ["ltr", "rtl"] as const) {
    await expect(summary).toBeVisible()

    await page.setViewportSize({ width: 1800, height: 900 })
-    await expect(panel).toHaveAttribute("data-summary-resizing", "false")
-    await expect(content).toHaveCSS("translate", "none")
+    await expect(content).toHaveCSS("translate", "0px")
    await expect(summary).toBeVisible()

    await page.emulateMedia({ reducedMotion: "reduce" })
@@ -166,45 +166,6 @@ test.describe("session timeline projection", () => {
    await expect(longNotice.locator("[title]")).toHaveAttribute("title", `Switched to ${longName}`)
    await expect.poll(() => longNotice.evaluate((element) => element.scrollWidth <= element.clientWidth)).toBe(true)
  })
-
-  test("does not repeat a review comment file as an attachment", async ({ page }) => {
-    const message = userMessage([
-      userText("what's goin on here", { id: "prt_user_review_comment" }),
-      {
-        id: "prt_user_review_file",
-        type: "file",
-        mime: "text/plain",
-        filename: "LiveRuntime.ts",
-        url: "file:///repo/LiveRuntime.ts?start=14&end=32",
-      },
-      {
-        id: "prt_user_unrelated_file",
-        type: "file",
-        mime: "text/plain",
-        filename: "notes.txt",
-        url: "data:text/plain;base64,bm90ZXM=",
-      },
-    ])
-    message.metadata = {
-      displayText: "what's goin on here",
-      comments: [
-        {
-          path: "LiveRuntime.ts",
-          comment: "what's goin on here",
-          selection: { startLine: 14, startChar: 0, endLine: 32, endChar: 0 },
-          origin: "review",
-        },
-      ],
-    }
-
-    await setupTimeline(page, { messages: [message, assistantMessage()] })
-
-    const user = page.locator('[data-component="user-message"]')
-    await expect(user.getByText("LiveRuntime.ts:14-32", { exact: true })).toBeVisible()
-    const attachments = user.locator('[data-slot="user-message-attachments"]')
-    await expect(attachments.getByText("LiveRuntime.ts", { exact: true })).toHaveCount(0)
-    await expect(attachments.getByText("notes.txt", { exact: true })).toBeVisible()
-  })
 })

 function patchFile(file: string, status: "added" | "modified" | "deleted") {
@@ -116,7 +116,7 @@ test("single-server settings expose scoped pages without a server picker", async
  await expect(connection.getByRole("heading", { name: "Connection", exact: true })).toBeVisible()
  await expect(connection.locator('[data-component="settings-list"]')).toHaveCSS("padding-left", "16px")
  await expect(connection.locator(".settings-servers-row")).toHaveCSS("padding-top", "20px")
-  await expect(connection.locator(".settings-servers-lead")).toHaveCSS("column-gap", "10px")
+  await expect(connection.locator(".settings-servers-lead")).toHaveCSS("column-gap", "4px")
  await expect(connection.locator(".settings-servers-copy")).toHaveCSS("row-gap", "6px")
  await expect(settings.getByRole("heading", { name: "Preferences", exact: true })).toBeVisible()
  await expect(settings.getByText("Terminal shell", { exact: true })).toBeVisible()
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/app",
-  "version": "2.0.12",
+  "version": "2.0.8",
  "description": "",
  "type": "module",
  "exports": {
@@ -65,14 +65,14 @@
  }

  /* Keep the 1000px conversation intact, with 320px for the summary and its gutters.
-     When they overlap, center the conversation in the space that remains beside the summary. */
-  @container session-chat (min-width: 1320px) and (width < 1640px) {
+     Move only as far as needed; wider panels already have enough space in the margin. */
+  @container session-chat (min-width: 1320px) {
    [data-slot="session-chat-panel"][data-summary-open="true"]
      :is([data-timeline-virtual-content], [data-component="session-composer-dock"] > div) {
-      --session-summary-translate: -160px;
+      --session-summary-translate: min(0px, calc(50cqi - 820px));

      &:dir(rtl) {
-        --session-summary-translate: 160px;
+        --session-summary-translate: max(0px, calc(820px - 50cqi));
      }
    }
  }
@@ -625,16 +625,6 @@ export const dict = {
  "toast.file.loadFailed.title": "Failed to load file",
  "file.error.notFound": "File not found: {{name}}",
  "toast.file.listFailed.title": "Failed to list files",
-  "file.view.preview": "Preview",
-  "file.view.source": "Source",
-  "file.view.openInBrowser": "Open in browser",
-  "file.view.binary": "Binary file · {{size}}",
-  "file.view.table.rows.one": "{{count}} row",
-  "file.view.table.rows.other": "{{count}} rows",
-  "file.view.table.columns.one": "{{count}} column",
-  "file.view.table.columns.other": "{{count}} columns",
-  "file.view.table.truncated": "Showing the first {{shown}} of {{total}} rows.",
-  "file.view.fontSample": "Sphinx of black quartz, judge my vow.",

  "toast.context.noLineSelection.title": "No line selection",
  "toast.context.noLineSelection.description": "Select a line range in a file tab first.",
@@ -916,10 +906,6 @@ export const dict = {
  "session.browser.replaced": "Browser control moved to another desktop window.",
  "session.browser.suspended": "Browser suspended. Interact with this session to reconnect.",
  "session.browser.address.placeholder": "Enter URL",
-  "session.browser.empty.title": "Enter URL",
-  "session.browser.empty.description": 'Or prompt "Open in the app browser"',
-  "session.browser.failed.title": "URL can't be reached",
-  "session.browser.failed.description": "Check the URL and your connection, then try again.",

  "titlebar.update": "Update",
  "titlebar.tabs": "Tabs",
@@ -19,7 +19,6 @@ export type BrowserPaneCommand = Browser.Action
 export type BrowserPaneState = Browser.State | null
 export type BrowserPaneEvent =
  | { type: "focus"; tabID: Browser.TabID }
-  | { type: "preview"; path: string }
  | { type: "state"; state: BrowserPaneState; error?: string }

 export type BrowserPaneRegistration = {
@@ -33,8 +33,6 @@ export type FileContent = {
  }
  encoding?: "base64"
  mimeType?: string
-  /** On-disk size when the bytes themselves are not retained. */
-  size?: number
 }

 export type Path = {
@@ -1,15 +1,14 @@
-import { batch, createEffect, createMemo, createRoot, getOwner, on, onCleanup, runWithOwner } from "solid-js"
+import { createEffect, createMemo, getOwner, on, onCleanup, runWithOwner } from "solid-js"
 import { createStore, reconcile } from "solid-js/store"
 import { createSimpleContext } from "@opencode/ui/context"
+import type { Browser } from "@opencode/plugin-browser/rpc"
 import { useLanguage } from "@/runtime/i18n/language"
 import type { BrowserPaneCommand } from "@/runtime/platform/browser-pane"
 import { usePlatform } from "@/runtime/platform/platform"
 import type { useServer } from "@/runtime/server/current"
-import type { SessionStateKey } from "@/runtime/server/scope"
 import { useSettings } from "@/settings/model"
 import { findSessionTab, tabKey, useTabs } from "@/shell/tabs/tabs"
-import { useCurrentRoute, useLayout } from "@/shell/state/layout"
-import { sessionBrowserTab } from "@/shell/state/session-tabs"
+import { useCurrentRoute } from "@/shell/state/layout"
 import { createEventListener } from "@solid-primitives/event-listener"
 import { createBrowserConnection, type BrowserConnectionState } from "./connection"

@@ -36,14 +35,13 @@ export const { use: useBrowserAttachments, provider: BrowserAttachmentsProvider
    const settings = useSettings()
    const language = useLanguage()
    const shellTabs = useTabs()
-    const layout = useLayout()
    const route = useCurrentRoute()
    const owner = getOwner()
    const [store, setStore] = createStore<Record<string, BrowserAttachment | undefined>>({})
    // Servers whose plugin lacks the browser RPC; sessions on them stop retrying.
    const [unsupported, setUnsupported] = createStore<Record<string, true | undefined>>({})
    const live = new Map<string, Live>()
-    const preview = new Map<string, Set<(path: string) => void>>()
+    const focus = new Map<string, Set<(tabID: Browser.TabID) => void>>()
    const key = (server: Server, sessionID: string) => `${server.key}\n${sessionID}`
    const enabled = createMemo(
      () => !!platform.browserPane && settings.ready() && settings.general.experimentalBrowser(),
@@ -89,14 +87,11 @@ export const { use: useBrowserAttachments, provider: BrowserAttachmentsProvider
      enabled,
      supported: (server: Server) => !unsupported[server.key],
      state: (server: Server, sessionID: string) => store[key(server, sessionID)],
-      attach(server: Server, sessionID: string, sessionKey: SessionStateKey) {
+      attach(server: Server, sessionID: string) {
        const id = key(server, sessionID)
        if (live.has(id)) return
        const pane = platform.browserPane
        if (!pane || !enabled() || unsupported[server.key] || server.health?.incompatible) return
-        // Focus requests write to the owning session's layout even while another shell tab is routed,
-        // so the Review pane and browser tab are already selected when the user returns to it.
-        const tabs = createRoot((dispose) => ({ dispose, layout: layout.tabs(sessionKey) }), owner)
        const connection = createBrowserConnection({
          pane,
          // Resolve the current port at every wake, including after sidecar replacement.
@@ -105,15 +100,7 @@ export const { use: useBrowserAttachments, provider: BrowserAttachmentsProvider
            sessionID,
            endpoint: { ...server.conn.http, url: server.ctx.sdk.url },
          }),
-          focus: (tabID) => {
-            const tab = sessionBrowserTab(tabID)
-            batch(() => {
-              shellTabs.setPane(findSessionTab(shellTabs.store, server.key, sessionID), "review", true)
-              if (!tabs.layout.all().includes(tab)) tabs.layout.setAll([...tabs.layout.all(), tab])
-              tabs.layout.setActive(tab)
-            })
-          },
-          preview: (path) => preview.get(id)?.forEach((listener) => listener(path)),
+          focus: (tabID) => focus.get(id)?.forEach((listener) => listener(tabID)),
          change: (state) => {
            if (state.error === "browser.pane.unsupported") {
              setUnsupported(server.key, true)
@@ -151,18 +138,17 @@ export const { use: useBrowserAttachments, provider: BrowserAttachmentsProvider
        entry.dispose = () => {
          unsubscribe?.forEach((dispose) => dispose())
          connection.dispose()
-          tabs.dispose()
        }
      },
-      /** Agent requests to show a file in this session's Review pane. */
-      onPreview(server: Server, sessionID: string, listener: (path: string) => void) {
+      /** Desktop focus requests for a mounted session route; nothing is replayed to routes mounted later. */
+      onFocus(server: Server, sessionID: string, listener: (tabID: Browser.TabID) => void) {
        const id = key(server, sessionID)
-        const listeners = preview.get(id) ?? new Set()
+        const listeners = focus.get(id) ?? new Set()
        listeners.add(listener)
-        preview.set(id, listeners)
+        focus.set(id, listeners)
        return () => {
          listeners.delete(listener)
-          if (!listeners.size) preview.delete(id)
+          if (!listeners.size) focus.delete(id)
        }
      },
      command(server: Server, sessionID: string, command: BrowserPaneCommand) {
@@ -28,12 +28,10 @@ function fixture() {
    commands: Browser.Action[]
  }[] = []
  const endpoint = { url: "http://localhost:4096" }
-  const previews: string[] = []
  const connection = createBrowserConnection({
    target: () => ({ serverKey: "browser-test", sessionID: "ses_browser", endpoint: { ...endpoint } }),
    change: (state) => states.push(state),
    focus: () => {},
-    preview: (path) => previews.push(path),
    pane: {
      register(target, emit) {
        const call = { target, emit, closed: false, commands: [] as Browser.Action[] }
@@ -52,21 +50,9 @@ function fixture() {
  })
  connection.wake()
  calls[0].emit({ type: "state", state: browser })
-  return { connection, calls, states, endpoint, previews }
+  return { connection, calls, states, endpoint }
 }

-test("preview requests reach the session without touching connection state", () => {
-  const app = fixture()
-  try {
-    const before = app.states.length
-    app.calls[0].emit({ type: "preview", path: "docs/report.pdf" })
-    expect(app.previews).toEqual(["docs/report.pdf"])
-    expect(app.states).toHaveLength(before)
-  } finally {
-    app.connection.dispose()
-  }
-})
-
 test("suspension retains tabs and reconnects once on demand using the current endpoint", async () => {
  const app = fixture()
  try {
@@ -19,7 +19,6 @@ export function createBrowserConnection(input: {
  target: () => BrowserPaneTarget
  change: (state: BrowserConnectionState) => void
  focus: (tabID: Browser.TabID) => void
-  preview: (path: string) => void
 }) {
  const state: BrowserConnectionState = { browser: null, suspended: false }
  let disposed = false
@@ -34,7 +33,6 @@ export function createBrowserConnection(input: {
      (event) => {
        if (disposed || state.registration !== registration) return
        if (event.type === "focus") return input.focus(event.tabID)
-        if (event.type === "preview") return input.preview(event.path)
        if (event.error === "browser.pane.unsupported" || event.error === "browser.pane.replaced") {
          blocked = true
          registration.close()
@@ -1,4 +1,4 @@
-import { batch, createEffect, createMemo, on } from "solid-js"
+import { batch, createEffect, createMemo, on, onCleanup } from "solid-js"
 import type { Browser } from "@opencode/plugin-browser/rpc"
 import { createStore } from "solid-js/store"
 import { useLanguage } from "@/runtime/i18n/language"
@@ -33,6 +33,13 @@ export function createSessionBrowser(session: SessionModel) {
      attachment()?.browser?.tabs.filter((tab) => session.layout.tabs().all().includes(sessionBrowserTab(tab.id))) ??
      [],
  )
+  const focus = (tabID: Browser.TabID) => {
+    session.layout.view().reviewPanel.open()
+    const tabs = session.layout.tabs()
+    const key = sessionBrowserTab(tabID)
+    if (!tabs.all().includes(key)) tabs.setAll([...tabs.all(), key])
+    tabs.setActive(key)
+  }
  const command = (command: BrowserPaneCommand) => {
    const sessionID = session.identity.sessionID()
    if (!sessionID) return
@@ -59,7 +66,8 @@ export function createSessionBrowser(session: SessionModel) {
  createEffect(() => {
    const sessionID = session.identity.sessionID()
    if (!sessionID) return
-    if (attachments.enabled()) attachments.attach(server, sessionID, session.layout.sessionKey())
+    if (attachments.enabled()) attachments.attach(server, sessionID)
+    onCleanup(attachments.onFocus(server, sessionID, focus))
  })
  createEffect(
    on(
@@ -20,18 +20,13 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
  const command = useCommand()
  const state = props.browser.active
  const address = () => (state()?.url === "about:blank" ? "" : (state()?.url ?? ""))
-  const failed = () => !!state()?.loadError
  const registration = props.browser.registration
  const button = { variant: "ghost", size: "large" } as const
  const [store, setStore] = createStore({
    address: "",
    editing: false,
-    submitted: false,
-    // A submitted navigation the browser has not reported yet; keeps the empty state hidden meanwhile.
-    navigating: false,
    visible: typeof document === "undefined" || document.visibilityState === "visible",
  })
-  const empty = () => !address() && !state()?.loading && !store.navigating
  let surface: HTMLDivElement | undefined
  let addressDisplay: HTMLDivElement | undefined
  let frame: number | undefined
@@ -48,7 +43,7 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
      title: language.t("command.browser.reload"),
      category: language.t("command.category.view"),
      keybind: "f5",
-      disabled: !props.visible || !address(),
+      disabled: !props.visible || !state(),
      onSelect: () => {
        const tab = state()
        if (tab) props.browser.command({ type: "reload", tabID: tab.id })
@@ -76,9 +71,7 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
    const top = Math.round(rect.top * zoom)
    const right = Math.round(rect.right * zoom)
    const bottom = Math.round(rect.bottom * zoom)
-    // The desktop page hides blank and loading documents itself; only hide here
-    // while the pane shows its own empty or failed state over the surface.
-    const visible = props.visible && store.visible && !empty() && !failed() && !dialog.active && !covered(rect)
+    const visible = props.visible && store.visible && !dialog.active && !covered(rect)
    // The cutout exposes the app backdrop outside the rounded Review card,
    // not the browser surface inside it.
    const color = getComputedStyle(
@@ -114,25 +107,7 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
    if (frame === undefined) frame = requestAnimationFrame(tick)
  }

-  createEffect(on([() => state()?.id, address], () => !store.editing && setStore("address", address())))
-  // Any reported movement, including a rejected or blocked request, ends the submitted navigation.
-  createEffect(
-    on(
-      [() => state()?.id, () => state()?.generation, () => state()?.loading, () => props.browser.error()],
-      () => setStore("navigating", false),
-      { defer: true },
-    ),
-  )
-  // A blocked or rejected submission leaves the page where it was; show that page's URL again.
-  createEffect(
-    on(
-      () => props.browser.error(),
-      (error) => {
-        if (error && !store.editing) setStore("address", address())
-      },
-      { defer: true },
-    ),
-  )
+  createEffect(() => !store.editing && setStore("address", address()))
  createEffect(
    on(registration, (current) => {
      // Session routes can change before this pane unmounts. Hide the registration
@@ -148,8 +123,6 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
        () => store.visible,
        () => props.visible,
        () => state()?.id,
-        empty,
-        failed,
        registration,
      ],
      () => {
@@ -184,7 +157,7 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes

  return (
    <aside id="browser-panel" class="relative size-full min-w-0 overflow-hidden bg-v2-background-bg-base flex flex-col">
-      <div class="h-10 shrink-0 flex items-center gap-1 px-3 border-b border-v2-border-border-muted">
+      <div class="h-10 shrink-0 flex items-center gap-1 px-2 border-b border-v2-border-border-muted">
        <For each={["back", "forward"] as const}>
          {(direction) => (
            <Tooltip placement="top" value={language.t(direction === "back" ? "common.goBack" : "common.goForward")}>
@@ -220,7 +193,7 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
        >
          <IconButton
            {...button}
-            disabled={!state()?.loading && !address()}
+            disabled={!state()}
            aria-label={language.t(state()?.loading ? "prompt.action.stop" : "error.page.action.reload")}
            onClick={() => {
              const tab = state()
@@ -239,13 +212,8 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
          onSubmit={(event) => {
            event.preventDefault()
            const tab = state()
-            const url = store.address.trim()
-            if (!tab) return
-            if (url || failed()) {
-              setStore({ submitted: true, address: url, navigating: true })
-              props.browser.command({ type: "navigate", tabID: tab.id, url: url || "about:blank" })
-            }
-            event.currentTarget.querySelector("input")?.blur()
+            if (tab && store.address.trim())
+              props.browser.command({ type: "navigate", tabID: tab.id, url: store.address })
          }}
        >
          <input
@@ -256,14 +224,8 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
            disabled={!state()}
            placeholder={language.t("session.browser.address.placeholder")}
            aria-label={language.t("session.browser.address")}
-            onFocus={(event) => {
-              setStore("editing", true)
-              event.currentTarget.select()
-            }}
-            onClick={(event) => event.currentTarget.select()}
-            onBlur={() =>
-              setStore({ editing: false, address: store.submitted ? store.address : address(), submitted: false })
-            }
+            onFocus={() => setStore("editing", true)}
+            onBlur={() => setStore({ editing: false, address: address() })}
            onInput={(event) => setStore("address", event.currentTarget.value)}
            onScroll={(event) => {
              if (addressDisplay) addressDisplay.scrollLeft = event.currentTarget.scrollLeft
@@ -281,27 +243,12 @@ export function SessionBrowserPane(props: { browser: ReturnType<typeof createSes
          </div>
        </form>
      </div>
-      <Show when={props.browser.error() && !failed()}>
+      <Show when={props.browser.error()}>
        <div class="shrink-0 px-3 py-1.5 text-12-regular text-text-danger-base border-b border-v2-border-border-muted">
          {props.browser.error()}
        </div>
      </Show>
      <div ref={surface} class="min-h-0 flex-1 bg-v2-background-bg-base flex items-center justify-center">
-        <Show when={(empty() || failed()) && !props.browser.suspended()}>
-          {/* Add the 40px toolbar to the file empty state's 160px bottom padding to align their centers. */}
-          <div
-            dir="auto"
-            class="flex size-full flex-col items-center justify-center gap-2 p-6 pb-[200px] text-center text-text-weak"
-          >
-            <Icon name="globe" size="large" class="mb-2 shrink-0" />
-            <div class="text-[13px] font-medium leading-[var(--line-height-compact)] text-text-strong">
-              {language.t(failed() ? "session.browser.failed.title" : "session.browser.empty.title")}
-            </div>
-            <div class="text-13-regular leading-[var(--line-height-base)]">
-              {language.t(failed() ? "session.browser.failed.description" : "session.browser.empty.description")}
-            </div>
-          </div>
-        </Show>
        <Show when={props.browser.suspended()}>
          <p class="px-6 text-center text-13-regular text-v2-text-text-subtle" role="status">
            {language.t("session.browser.suspended")}
@@ -1,94 +0,0 @@
-/* The control defaults to a fixed 232px with equal segments; here it hugs its two labels. */
-[data-slot="artifact-toolbar"] [data-slot="segmented-control-v2"] {
-  width: auto;
-}
-
-[data-slot="artifact-toolbar"] [data-slot="segmented-control-v2-item"] {
-  flex: 0 0 auto;
-  padding: 0 14px;
-}
-
-/* Shrink-wrapped segments round the label box down a fraction; the ellipsis overflow then clips glyph edges. */
-[data-slot="artifact-toolbar"] [data-slot="segmented-control-v2-item-label"] {
-  overflow: visible;
-  max-width: none;
-}
-
-[data-slot="artifact-stage"] {
-  --artifact-check: color-mix(in oklch, var(--v2-text-text-base) 5%, transparent);
-  background-color: var(--v2-background-bg-deep);
-}
-
-[data-slot="artifact-stage"][data-checker] {
-  background-image:
-    linear-gradient(45deg, var(--artifact-check) 25%, transparent 25%),
-    linear-gradient(-45deg, var(--artifact-check) 25%, transparent 25%),
-    linear-gradient(45deg, transparent 75%, var(--artifact-check) 75%),
-    linear-gradient(-45deg, transparent 75%, var(--artifact-check) 75%);
-  background-size: 16px 16px;
-  background-position:
-    0 0,
-    0 8px,
-    8px -8px,
-    -8px 0;
-}
-
-[data-slot="artifact-media"] {
-  display: block;
-  border-radius: 4px;
-  box-shadow:
-    0 0 0 0.5px var(--v2-border-border-base),
-    0 12px 32px -12px color-mix(in oklch, var(--v2-text-text-base) 25%, transparent);
-}
-
-[data-slot="artifact-stage"][data-zoom="fit"] [data-slot="artifact-media"] {
-  max-width: 100%;
-  max-height: 100%;
-  object-fit: contain;
-}
-
-[data-slot="artifact-stage"][data-zoom="fit"][data-overflow] [data-slot="artifact-media"] {
-  cursor: zoom-in;
-}
-
-[data-slot="artifact-stage"][data-zoom="actual"] [data-slot="artifact-media"] {
-  cursor: zoom-out;
-}
-
-[data-slot="artifact-table"] {
-  border-collapse: separate;
-  border-spacing: 0;
-  font-variant-numeric: tabular-nums;
-}
-
-[data-slot="artifact-table"] th,
-[data-slot="artifact-table"] td {
-  padding: 5px 12px;
-  border-bottom: 1px solid var(--v2-border-border-muted);
-  border-inline-end: 1px solid var(--v2-border-border-muted);
-  white-space: pre;
-  max-width: 40ch;
-  overflow: hidden;
-  text-overflow: ellipsis;
-  text-align: start;
-  line-height: var(--line-height-compact);
-}
-
-[data-slot="artifact-table"] th {
-  position: sticky;
-  top: 0;
-  z-index: 1;
-  background: var(--v2-background-bg-layer-01);
-  font-weight: var(--font-weight-medium);
-  color: var(--v2-text-text-muted);
-}
-
-[data-slot="artifact-table"] tbody tr:hover td {
-  background: color-mix(in oklch, var(--v2-text-text-base) 3%, transparent);
-}
-
-[data-slot="artifact-table"] td[data-index] {
-  color: var(--v2-text-text-faint);
-  text-align: end;
-  user-select: none;
-}
@@ -1,454 +0,0 @@
-import { createEffect, createMemo, For, Match, on, onCleanup, Show, Switch, type JSX } from "solid-js"
-import { createStore } from "solid-js/store"
-import { createResizeObserver } from "@solid-primitives/resize-observer"
-import { Button } from "@opencode/ui/button"
-import { FileIcon } from "@opencode/ui/file-icon"
-import { SegmentedControl, SegmentedControlItem } from "@opencode/ui/segmented-control"
-import { ScrollView } from "@opencode/ui/scroll-view"
-import { Markdown } from "@opencode/session-ui/markdown"
-import { MarkdownProvider, useMarkdown } from "@opencode/session-ui/context/markdown"
-import { getDirectory, getFilename } from "@opencode/util/path"
-import type { FileContent } from "@/runtime/server/types"
-import { useLanguage } from "@/runtime/i18n/language"
-import {
-  artifactKind,
-  blobUrlFromContent,
-  contentBytes,
-  parseDelimited,
-  resolveArtifactPath,
-  type ArtifactKind,
-} from "@/workspaces/files/artifact"
-import { useArtifactOpener } from "@/session/files/open-artifact"
-import "./artifact-view.css"
-
-type ArtifactMode = "preview" | "source"
-
-/** Facts a viewer learns from the decoded media, shown in the toolbar. */
-type ArtifactInfo = { width?: number; height?: number; duration?: number; rows?: number; columns?: number }
-
-type MediaProps = {
-  path: string
-  content: FileContent
-  onInfo: (info: ArtifactInfo) => void
-  /** The browser could not decode the bytes; the host falls back to the binary placeholder. */
-  onError: () => void
-}
-
-/** Kinds that render a preview from their text and can toggle back to highlighted source. */
-const previewableKinds = new Set<ArtifactKind>(["svg", "html", "markdown", "mermaid", "table"])
-
-/**
- * Renders a loaded non-text file: media, documents, and data get a dedicated viewer with a toolbar;
- * previewable text kinds can switch to `source`, which the host supplies (its code view).
- */
-export function ArtifactView(props: { path: string; content: FileContent; cacheKey?: string; source: JSX.Element }) {
-  const language = useLanguage()
-  const [state, setState] = createStore({
-    mode: "preview" as ArtifactMode,
-    info: {} as ArtifactInfo,
-    // Media the browser could not decode falls back to the binary placeholder.
-    undecodable: false,
-  })
-  createEffect(
-    on(
-      () => props.content,
-      () => setState({ mode: "preview", info: {}, undecodable: false }),
-      { defer: true },
-    ),
-  )
-
-  const kind = createMemo<ArtifactKind | "binary">(() => {
-    if (props.content.type === "binary" && !props.content.mimeType) return "binary"
-    if (state.undecodable) return "binary"
-    return artifactKind(props.path)
-  })
-  const previewable = createMemo(() => {
-    const value = kind()
-    return value !== "binary" && previewableKinds.has(value)
-  })
-  const meta = createMemo(() => {
-    const info = state.info
-    return [
-      info.width && info.height ? `${info.width} × ${info.height}` : undefined,
-      info.duration ? formatDuration(info.duration) : undefined,
-      info.rows !== undefined ? language.plural("file.view.table.rows", Math.max(0, info.rows - 1)) : undefined,
-      info.columns !== undefined ? language.plural("file.view.table.columns", info.columns) : undefined,
-      formatBytes(language.intl(), contentBytes(props.content)),
-    ].filter((item): item is string => !!item)
-  })
-
-  const media = { onInfo: (info: ArtifactInfo) => setState("info", info), onError: () => setState("undecodable", true) }
-  const rendered = () => (
-    <ScrollView class="min-h-0 flex-1">
-      <Show
-        when={kind() === "markdown"}
-        fallback={<ArtifactMermaid text={props.content.content} cacheKey={props.cacheKey} />}
-      >
-        <ArtifactMarkdown path={props.path} text={props.content.content} cacheKey={props.cacheKey} />
-      </Show>
-    </ScrollView>
-  )
-
-  return (
-    <>
-      <ArtifactToolbar
-        mode={state.mode}
-        onModeChange={previewable() ? (mode) => setState("mode", mode) : undefined}
-        meta={meta()}
-        actions={
-          <Show when={kind() === "html"}>
-            <OpenInBrowserButton path={props.path} />
-          </Show>
-        }
-      />
-      <Show when={!previewable() || state.mode === "preview"} fallback={props.source}>
-        <Switch>
-          <Match when={kind() === "image" || kind() === "svg"}>
-            <ArtifactImage path={props.path} content={props.content} {...media} />
-          </Match>
-          <Match when={kind() === "video"}>
-            <ArtifactVideo path={props.path} content={props.content} {...media} />
-          </Match>
-          <Match when={kind() === "audio"}>
-            <ArtifactAudio path={props.path} content={props.content} {...media} />
-          </Match>
-          <Match when={kind() === "pdf" || kind() === "html"}>
-            <ArtifactFrame path={props.path} content={props.content} kind={kind() === "pdf" ? "pdf" : "html"} />
-          </Match>
-          <Match when={kind() === "font"}>
-            <ArtifactFont path={props.path} content={props.content} />
-          </Match>
-          <Match when={kind() === "table"}>
-            <ArtifactTable path={props.path} text={props.content.content} onInfo={media.onInfo} />
-          </Match>
-          <Match when={kind() === "markdown" || kind() === "mermaid"}>{rendered()}</Match>
-          <Match when={kind() === "binary"}>
-            <ArtifactBinary path={props.path} size={formatBytes(language.intl(), contentBytes(props.content))} />
-          </Match>
-        </Switch>
-      </Show>
-    </>
-  )
-}
-
-function formatBytes(locale: string, bytes: number) {
-  const units = ["byte", "kilobyte", "megabyte", "gigabyte"] as const
-  const index = Math.min(units.length - 1, bytes > 0 ? Math.floor(Math.log10(bytes) / 3) : 0)
-  const value = bytes / 1000 ** index
-  return new Intl.NumberFormat(locale, {
-    style: "unit",
-    unit: units[index],
-    // "short" bytes render as the singular "byte"; the long form pluralizes correctly.
-    unitDisplay: index === 0 ? "long" : "short",
-    maximumFractionDigits: value >= 100 || index === 0 ? 0 : 1,
-  }).format(value)
-}
-
-function formatDuration(seconds: number) {
-  const total = Math.round(seconds)
-  const minutes = Math.floor(total / 60)
-  return `${minutes}:${String(total % 60).padStart(2, "0")}`
-}
-
-function ArtifactToolbar(props: {
-  mode?: ArtifactMode
-  onModeChange?: (mode: ArtifactMode) => void
-  meta: string[]
-  actions?: JSX.Element
-}) {
-  const language = useLanguage()
-  return (
-    <div data-slot="artifact-toolbar" class="flex h-10 shrink-0 items-center gap-3 px-4">
-      <Show when={props.onModeChange}>
-        <SegmentedControl
-          value={props.mode ?? "preview"}
-          onChange={(value) => {
-            if (value === "preview" || value === "source") props.onModeChange?.(value)
-          }}
-        >
-          <SegmentedControlItem value="preview">{language.t("file.view.preview")}</SegmentedControlItem>
-          <SegmentedControlItem value="source">{language.t("file.view.source")}</SegmentedControlItem>
-        </SegmentedControl>
-      </Show>
-      <div class="ms-auto flex min-w-0 items-center gap-3">
-        <div class="flex min-w-0 items-center gap-2 text-12-regular text-text-weak">
-          <For each={props.meta}>
-            {(item, index) => (
-              <>
-                <Show when={index() > 0}>
-                  <span aria-hidden class="text-text-faint">
-                    ·
-                  </span>
-                </Show>
-                <span class="truncate tabular-nums">{item}</span>
-              </>
-            )}
-          </For>
-        </div>
-        {props.actions}
-      </div>
-    </div>
-  )
-}
-
-function OpenInBrowserButton(props: { path: string }) {
-  const language = useLanguage()
-  const artifacts = useArtifactOpener()
-  return (
-    <Show when={artifacts.canOpenInBrowser(props.path)}>
-      <Button size="small" variant="ghost" icon="globe" onClick={() => artifacts.openInBrowser(props.path)}>
-        {language.t("file.view.openInBrowser")}
-      </Button>
-    </Show>
-  )
-}
-
-function createBlobUrl(content: () => FileContent) {
-  return createMemo(() => {
-    const value = blobUrlFromContent(content())
-    onCleanup(() => URL.revokeObjectURL(value))
-    return value
-  })
-}
-
-/** Images and SVG previews: fit the pane, click to inspect at 1:1 when the image is larger. */
-function ArtifactImage(props: MediaProps) {
-  const url = createBlobUrl(() => props.content)
-  const [state, setState] = createStore({ zoom: "fit" as "fit" | "actual", overflow: false, width: 0, height: 0 })
-  let stage: HTMLDivElement | undefined
-  const measure = () => {
-    if (!stage) return
-    setState("overflow", state.width > stage.clientWidth - 48 || state.height > stage.clientHeight - 48)
-  }
-  createResizeObserver(
-    () => stage,
-    () => measure(),
-  )
-  createEffect(() => {
-    url()
-    setState({ zoom: "fit", overflow: false })
-  })
-  return (
-    <div
-      ref={stage}
-      data-slot="artifact-stage"
-      data-checker
-      data-zoom={state.zoom}
-      data-overflow={state.overflow || undefined}
-      class="relative min-h-0 flex-1 overflow-auto"
-    >
-      <div
-        classList={{
-          "absolute inset-0 flex items-center justify-center p-6": state.zoom === "fit",
-          "flex min-h-full min-w-full w-max items-center justify-center p-6": state.zoom === "actual",
-        }}
-      >
-        <img
-          data-slot="artifact-media"
-          src={url()}
-          alt={getFilename(props.path)}
-          draggable={false}
-          onError={() => props.onError()}
-          onLoad={(event) => {
-            const image = event.currentTarget
-            setState({ width: image.naturalWidth, height: image.naturalHeight })
-            props.onInfo({ width: image.naturalWidth, height: image.naturalHeight })
-            measure()
-          }}
-          onClick={() => {
-            if (!state.overflow && state.zoom === "fit") return
-            setState("zoom", state.zoom === "fit" ? "actual" : "fit")
-          }}
-        />
-      </div>
-    </div>
-  )
-}
-
-function ArtifactVideo(props: MediaProps) {
-  const url = createBlobUrl(() => props.content)
-  return (
-    <div data-slot="artifact-stage" data-zoom="fit" class="relative min-h-0 flex-1 overflow-hidden">
-      <div class="absolute inset-0 flex items-center justify-center p-6">
-        <video
-          data-slot="artifact-media"
-          class="w-full bg-black"
-          controls
-          preload="metadata"
-          playsinline
-          onError={() => props.onError()}
-          src={url()}
-          onLoadedMetadata={(event) => {
-            const video = event.currentTarget
-            props.onInfo({ width: video.videoWidth, height: video.videoHeight, duration: video.duration })
-          }}
-        />
-      </div>
-    </div>
-  )
-}
-
-function ArtifactAudio(props: MediaProps) {
-  const url = createBlobUrl(() => props.content)
-  return (
-    <div data-slot="artifact-stage" class="relative min-h-0 flex-1 overflow-auto">
-      <div class="absolute inset-0 flex items-center justify-center p-6">
-        <div class="flex w-full max-w-lg flex-col items-center gap-5 rounded-xl border border-v2-border-border-muted bg-v2-background-bg-base px-8 py-8 shadow-[var(--v2-elevation-raised)]">
-          <div class="flex size-14 items-center justify-center rounded-full bg-v2-background-bg-layer-02">
-            <FileIcon node={{ path: props.path, type: "file" }} class="size-7" />
-          </div>
-          <div class="max-w-full truncate text-14-medium text-text-strong">{getFilename(props.path)}</div>
-          <audio
-            class="w-full"
-            onError={() => props.onError()}
-            controls
-            preload="metadata"
-            src={url()}
-            onLoadedMetadata={(event) => props.onInfo({ duration: event.currentTarget.duration })}
-          />
-        </div>
-      </div>
-    </div>
-  )
-}
-
-function ArtifactFrame(props: { path: string; content: FileContent; kind: "pdf" | "html" }) {
-  const url = createBlobUrl(() => props.content)
-  // PDF Open Parameters: start with the thumbnail pane closed and the page fitted to the pane width.
-  const src = () => (props.kind === "pdf" ? `${url()}#navpanes=0&view=FitH` : url())
-  return (
-    <iframe
-      class="block h-full w-full flex-1 border-0 bg-white"
-      title={getFilename(props.path)}
-      src={src()}
-      // The PDF viewer is Chromium's own and does not run in a sandboxed frame. HTML runs as an
-      // opaque origin: no app storage, cookies, or credentialed requests reach it.
-      sandbox={props.kind === "html" ? "allow-scripts allow-popups allow-forms allow-modals" : undefined}
-      referrerPolicy="no-referrer"
-    />
-  )
-}
-
-function ArtifactMarkdown(props: { path: string; text: string; cacheKey?: string }) {
-  const parent = useMarkdown()
-  const artifacts = useArtifactOpener()
-  // getDirectory yields "/" for a root-level file, which would make relative links absolute.
-  const dir = createMemo(() => (props.path.includes("/") || props.path.includes("\\") ? getDirectory(props.path) : ""))
-  // Absolute references bypass the file's directory; relative ones resolve against it.
-  const resolve = (href: string) => (/^([a-z]:)?\//i.test(href) ? href : (resolveArtifactPath(dir(), href) ?? href))
-  return (
-    <MarkdownProvider
-      readImage={(src, signal) => parent?.readImage?.(resolve(src), signal) ?? Promise.resolve(undefined)}
-      openLocalFile={(href) => artifacts.open(href, dir())}
-    >
-      <div class="mx-auto w-full max-w-3xl px-8 py-6">
-        <Markdown text={props.text} cacheKey={props.cacheKey} class="select-text" />
-      </div>
-    </MarkdownProvider>
-  )
-}
-
-/** Mermaid sources render through the same fenced-block pipeline the timeline uses. */
-function ArtifactMermaid(props: { text: string; cacheKey?: string }) {
-  return (
-    <div class="mx-auto w-full max-w-4xl px-8 py-6">
-      <Markdown text={`\`\`\`mermaid\n${props.text}\n\`\`\``} cacheKey={props.cacheKey} class="select-text" />
-    </div>
-  )
-}
-
-function ArtifactTable(props: { path: string; text: string; onInfo: (info: ArtifactInfo) => void }) {
-  const language = useLanguage()
-  const parsed = createMemo(() => parseDelimited(props.text, props.path.toLowerCase().endsWith(".tsv") ? "\t" : ","))
-  createEffect(() => props.onInfo({ rows: parsed().total, columns: parsed().columns }))
-  // Pad the header to the widest row so no data column is dropped.
-  const header = () => Array.from({ length: parsed().columns }, (_, index) => parsed().rows[0]?.[index] ?? "")
-  const body = () => parsed().rows.slice(1)
-  return (
-    <div class="min-h-0 flex-1 overflow-auto">
-      <table data-slot="artifact-table" class="min-w-full text-13-regular text-text-base">
-        <thead>
-          <tr>
-            <th data-index />
-            <For each={header()}>{(cell) => <th>{cell}</th>}</For>
-          </tr>
-        </thead>
-        <tbody>
-          <For each={body()}>
-            {(row, index) => (
-              <tr>
-                <td data-index>{index() + 1}</td>
-                <For each={header()}>{(_, column) => <td>{row[column()] ?? ""}</td>}</For>
-              </tr>
-            )}
-          </For>
-        </tbody>
-      </table>
-      <Show when={parsed().total > parsed().rows.length}>
-        <div class="px-4 py-3 text-12-regular text-text-weak">
-          {language.t("file.view.table.truncated", { shown: parsed().rows.length - 1, total: parsed().total - 1 })}
-        </div>
-      </Show>
-    </div>
-  )
-}
-
-const specimenSizes = [12, 16, 24, 40, 64]
-
-function ArtifactFont(props: { path: string; content: FileContent }) {
-  const language = useLanguage()
-  const url = createBlobUrl(() => props.content)
-  const family = createMemo(() => `artifact-${Math.random().toString(36).slice(2)}`)
-  createEffect(() => {
-    const face = new FontFace(family(), `url(${url()})`)
-    document.fonts.add(face)
-    void face.load().catch(() => undefined)
-    onCleanup(() => document.fonts.delete(face))
-  })
-  return (
-    <div class="min-h-0 flex-1 overflow-auto">
-      <div class="mx-auto flex w-full max-w-3xl flex-col gap-6 px-8 py-8" style={{ "font-family": `"${family()}"` }}>
-        <div class="text-text-strong" style={{ "font-size": "56px", "line-height": "1.1" }}>
-          {getFilename(props.path).replace(/\.[^.]+$/, "")}
-        </div>
-        <div class="break-all text-text-base" style={{ "font-size": "22px", "line-height": "1.4" }}>
-          ABCDEFGHIJKLMNOPQRSTUVWXYZ
-          <br />
-          abcdefghijklmnopqrstuvwxyz
-          <br />
-          0123456789 !?&@#%(){}[]
-        </div>
-        <div class="flex flex-col gap-3 border-t border-v2-border-border-muted pt-6">
-          <For each={specimenSizes}>
-            {(size) => (
-              <div class="flex items-baseline gap-4">
-                <span
-                  class="w-8 shrink-0 text-12-regular text-text-faint tabular-nums"
-                  style={{ "font-family": "var(--font-family-mono)" }}
-                >
-                  {size}
-                </span>
-                <span class="text-text-base" style={{ "font-size": `${size}px`, "line-height": "1.25" }}>
-                  {language.t("file.view.fontSample")}
-                </span>
-              </div>
-            )}
-          </For>
-        </div>
-      </div>
-    </div>
-  )
-}
-
-function ArtifactBinary(props: { path: string; size: string }) {
-  const language = useLanguage()
-  return (
-    <div data-slot="artifact-stage" class="relative min-h-0 flex-1">
-      <div class="absolute inset-0 flex flex-col items-center justify-center gap-3 p-6 text-center">
-        <FileIcon node={{ path: props.path, type: "file" }} class="size-8 text-text-weak" />
-        <div class="text-14-medium text-text-strong">{getFilename(props.path)}</div>
-        <div class="text-13-regular text-text-weak">{language.t("file.view.binary", { size: props.size })}</div>
-      </div>
-    </div>
-  )
-}
@@ -1,4 +1,4 @@
-import { createEffect, createMemo, createSignal, Match, on, onCleanup, Show, Switch } from "solid-js"
+import { createEffect, createMemo, createSignal, Match, on, onCleanup, Switch } from "solid-js"
 import { createStore } from "solid-js/store"
 import { Dynamic } from "solid-js/web"
 import { makeEventListener } from "@solid-primitives/event-listener"
@@ -11,9 +11,8 @@ import { LineCommentOverflowIcon } from "@opencode/ui/line-comment"
 import { Menu } from "@opencode/ui/menu"
 import { Tabs } from "@opencode/ui/tabs"
 import { ScrollView } from "@opencode/ui/scroll-view"
+import { showToast } from "@/shell/notifications/toast"
 import { selectionFromLines, useFile, type FileSelection, type SelectedLineRange } from "@/workspaces/files/model"
-import { artifactKind } from "@/workspaces/files/artifact"
-import { ArtifactView } from "@/session/files/artifact-view"
 import { useComments } from "@/composer/comments"
 import { useLanguage } from "@/runtime/i18n/language"
 import { useComposerState } from "@/composer/persistence"
@@ -206,11 +205,6 @@ export function SessionFileView(props: SessionFileViewProps) {
  })
  const contents = createMemo(() => state()?.content?.content ?? "")
  const cacheKey = createMemo(() => sampledChecksum(contents()))
-  // Plain text keeps the code view; every other kind is rendered by ArtifactView.
-  const artifact = createMemo(() => {
-    const content = state()?.content
-    return content?.type === "binary" || artifactKind(path() ?? "") !== "text"
-  })
  const selectedLines = createMemo<SelectedLineRange | null>(() => {
    const p = path()
    if (!p) return null
@@ -439,42 +433,39 @@ export function SessionFileView(props: SessionFileViewProps) {
        }}
        search={search}
        class="select-text"
-        // Media and previews have their own viewers below; the code view only ever shows text.
-        media={{ mode: "off" }}
+        media={{
+          mode: "auto",
+          path: path(),
+          current: state()?.content,
+          onLoad: scrollSync.queueRestore,
+          onError: (args: { kind: "image" | "audio" | "svg" }) => {
+            if (args.kind !== "svg") return
+            showToast({
+              variant: "error",
+              title: language.t("toast.file.loadFailed.title"),
+            })
+          },
+        }}
      />
    </div>
  )

-  // The code view scrolls inside ScrollView so line state and scroll position persist per tab.
-  const codeView = (source: string) => (
-    <ScrollView class="min-h-0 flex-1" viewportRef={scrollSync.setViewport} onScroll={scrollSync.handleScroll}>
-      {renderFile(source)}
-    </ScrollView>
-  )
-
  const content = () => (
-    <div class="mt-3 relative h-full min-h-0 flex flex-col">
-      <Switch>
-        <Match when={state()?.loaded ? state()?.content : undefined}>
-          {(value) => (
-            <Show when={artifact()} fallback={codeView(value().content)}>
-              <ArtifactView
-                path={path() ?? ""}
-                content={value()}
-                cacheKey={cacheKey()}
-                source={codeView(value().content)}
-              />
-            </Show>
-          )}
-        </Match>
-        <Match when={state()?.loading}>
-          <div class="px-6 py-4 text-text-weak">{language.t("common.loading")}…</div>
-        </Match>
-        <Match when={state()?.notFound ? state()?.name : undefined}>
-          {(name) => <div class="px-6 py-4 text-text-weak">{language.t("file.error.notFound", { name: name() })}</div>}
-        </Match>
-        <Match when={state()?.error}>{(err) => <div class="px-6 py-4 text-text-weak">{err()}</div>}</Match>
-      </Switch>
+    <div class="mt-3 relative h-full min-h-0">
+      <ScrollView class="h-full" viewportRef={scrollSync.setViewport} onScroll={scrollSync.handleScroll}>
+        <Switch>
+          <Match when={state()?.loaded}>{renderFile(contents())}</Match>
+          <Match when={state()?.loading}>
+            <div class="px-6 py-4 text-text-weak">{language.t("common.loading")}…</div>
+          </Match>
+          <Match when={state()?.notFound ? state()?.name : undefined}>
+            {(name) => (
+              <div class="px-6 py-4 text-text-weak">{language.t("file.error.notFound", { name: name() })}</div>
+            )}
+          </Match>
+          <Match when={state()?.error}>{(err) => <div class="px-6 py-4 text-text-weak">{err()}</div>}</Match>
+        </Switch>
+      </ScrollView>
    </div>
  )

@@ -1,105 +0,0 @@
-import { createEffect, onCleanup, type ParentProps } from "solid-js"
-import { createSimpleContext } from "@opencode/ui/context"
-import { MarkdownProvider, useMarkdown } from "@opencode/session-ui/context/markdown"
-import { useBrowserAttachments } from "@/session/browser/attachments"
-import type { SessionModel } from "@/session/model"
-import { useFile } from "@/workspaces/files/model"
-import { artifactKind, resolveArtifactPath } from "@/workspaces/files/artifact"
-import { encodeFilePath } from "@/workspaces/files/path"
-import { useWorkspaceLocation } from "@/workspaces/location"
-import { useServer } from "@/runtime/server/current"
-import { ServerConnection } from "@/runtime/server/registry"
-import { useSessionLayout } from "@/session/session-layout"
-import { createOpenSessionFileTab } from "@/session/helpers"
-import type { createSessionBrowser } from "@/session/browser/model"
-
-/** Routes local links in timeline markdown to the artifact opener while keeping image loading. */
-export function ArtifactMarkdownProvider(props: ParentProps) {
-  const markdown = useMarkdown()
-  const artifacts = useArtifactOpener()
-  return (
-    <MarkdownProvider readImage={markdown?.readImage} openLocalFile={(path) => artifacts.open(path)}>
-      {props.children}
-    </MarkdownProvider>
-  )
-}
-
-/**
- * Opens files the agent references as side-panel tabs, inside or outside the workspace, or as
- * a browser tab for HTML when the desktop can load the file directly.
- */
-export const { use: useArtifactOpener, provider: ArtifactOpenerProvider } = createSimpleContext({
-  name: "ArtifactOpener",
-  init: (props: { session: SessionModel; browser: ReturnType<typeof createSessionBrowser> }) => {
-    const file = useFile()
-    const server = useServer()
-    const location = useWorkspaceLocation()
-    const attachments = useBrowserAttachments()
-    const { tabs, view } = useSessionLayout()
-
-    const root = () => location().directory.replaceAll("\\", "/").replace(/\/+$/, "")
-
-    /**
-     * Turn a link into a path `useFile` can load: workspace-relative when it is under the root,
-     * otherwise absolute. Relative links resolve against `base`; ones that climb past the root
-     * become absolute too, so a `../../shared/report.pdf` still opens.
-     */
-    const resolve = (href: string, base?: string) => {
-      // Agents cite locations as path:line or path:line:col; the file is what opens.
-      const value = href.replaceAll("\\", "/").replace(/:\d+(?::\d+)?$/, "")
-      if (/^[a-z]:\//i.test(value) || value.startsWith("/")) return file.normalize(value)
-      const relative = resolveArtifactPath(base ?? "", value)
-      if (relative !== undefined) return file.normalize(relative)
-      // Climbing past the workspace root: resolve from the referencing folder's absolute location.
-      const dir = base ? `${root()}/${base.replace(/\/+$/, "")}` : root()
-      return file.normalize(resolveArtifactPath(dir, value) ?? value)
-    }
-
-    const showTab = createOpenSessionFileTab({
-      normalizeTab: (tab) => tab,
-      openTab: (tab) => tabs().open(tab),
-      pathFromTab: file.pathFromTab,
-      loadFile: () => undefined,
-      openReviewPanel: () => {
-        if (!view().reviewPanel.opened()) view().reviewPanel.open()
-      },
-      setActive: (tab) => tabs().setActive(tab),
-    })
-
-    // Inline paths are guessed from text, so confirm the file exists before a tab appears for it.
-    const openTab = (path: string) => {
-      void file.load(path).then(() => {
-        if (file.get(path)?.loaded) showTab(file.tab(path))
-      })
-    }
-
-    // The desktop's own sidecar shares this disk, and its browser pane accepts file:// URLs inside the
-    // session workspace only. Forwarded loopback servers do not qualify, matching the desktop policy.
-    const canOpenInBrowser = (path?: string) =>
-      ServerConnection.builtin(server.conn) &&
-      props.browser.available() &&
-      props.browser.attached() &&
-      (path === undefined || !file.absolute(path))
-
-    const openInBrowser = (path: string) => {
-      props.browser.command({ type: "tabs.open", url: `file://${encodeFilePath(`${root()}/${path}`)}` })
-    }
-
-    /** Open `href` as referenced from `base` (a workspace-relative directory, "" for the root). */
-    const open = (href: string, base?: string) => {
-      const path = resolve(href, base)
-      if (!path) return
-      if (artifactKind(path) === "html" && canOpenInBrowser(path)) return openInBrowser(path)
-      openTab(path)
-    }
-
-    // The agent's browser.preview tool arrives through the desktop browser pane attachment.
-    createEffect(() => {
-      const sessionID = props.session.identity.sessionID()
-      if (!sessionID) return
-      onCleanup(attachments.onPreview(server, sessionID, (path) => open(path)))
-    })
-
-    return { canOpenInBrowser, openInBrowser, open }
-  },
-})
@@ -173,9 +173,7 @@ export function SessionFileBrowserTab(props: {
          <SessionFilePanelV2Empty>
            <div class="flex flex-col items-center gap-2 text-center text-text-weak">
              <Icon name="file-tree" size="large" class="mb-2" />
-              <div class="text-[13px] font-medium leading-[13px] text-text-strong">
-                {language.t("command.file.open")}
-              </div>
+              <div class="text-[13px] font-medium leading-[13px] text-text-strong">{language.t("command.file.open")}</div>
              <div class="h-5 text-13-regular leading-5">{language.t("session.files.selectToOpen")}</div>
            </div>
          </SessionFilePanelV2Empty>
@@ -1,8 +1,6 @@
 import { children, createMemo, Show } from "solid-js"
 import type { JSX } from "solid-js"
 import { useSortable } from "@dnd-kit/solid/sortable"
-import { Icon } from "@opencode/ui/icon"
-import { IconButton } from "@opencode/ui/icon-button"
 import { Keybind } from "@opencode/ui/keybind"
 import { Tooltip } from "@opencode/ui/tooltip"
 import { Tabs } from "@opencode/ui/tabs"
@@ -71,19 +69,9 @@ export function SortableTab(props: {
              placement="bottom"
              gutter={10}
            >
-              <IconButton
-                size="small"
-                variant="ghost-muted"
-                onPointerDown={(event) => {
-                  event.preventDefault()
-                  event.stopPropagation()
-                }}
-                onClick={(event) => {
-                  event.preventDefault()
-                  event.stopPropagation()
-                  props.onTabClose(props.tab)
-                }}
-                icon={<Icon name="xmark-small" />}
+              <Tabs.CloseButton
+                class="h-5 w-5"
+                onClick={() => props.onTabClose(props.tab)}
                aria-label={language.t("common.closeTab")}
              />
            </Tooltip>
@@ -137,7 +137,6 @@ export function useSessionModel() {
      tabs: layout.tabs,
      view: layout.view,
      tabKey: layout.tabKey,
-      sessionKey: layout.sessionKey,
    },
    ownership: createSessionOwnership(layout.sessionKey),
    tabs: {
@@ -155,9 +155,6 @@ export function createSessionReview(input: {
  const count = () => diffs().length
  const hasChanges = () => count() > 0
  const ready = () => {
-    // A project without VCS never enables vcsQuery, so its status stays "pending" forever.
-    const project = input.session.project()
-    if (project && !project.vcs) return true
    if (mode() === "git" || mode() === "branch") return !vcsQuery.isPending
    return true
  }
@@ -249,7 +249,7 @@ function ReviewTitle(props: { review: SessionReviewModel }) {
 function ReviewEmpty(props: { review: SessionReviewModel; loadingClass: string }) {
  const language = useLanguage()
  const loading = () => (props.review.mode() === "git" || props.review.mode() === "branch") && !props.review.ready()
-  const noGit = () => props.review.noGit()
+  const noGit = () => props.review.mode() === "turn" && props.review.noGit()
  const text = () => {
    if (props.review.mode() === "git") return language.t("session.review.noUncommittedChanges")
    if (props.review.mode() === "branch") return language.t("session.review.noBranchChanges")
@@ -282,7 +282,7 @@ function ReviewEmpty(props: { review: SessionReviewModel; loadingClass: string }
 function ReviewPanelEmpty(props: { review: SessionReviewModel }) {
  const language = useLanguage()
  const loading = () => (props.review.mode() === "git" || props.review.mode() === "branch") && !props.review.ready()
-  const noGit = () => props.review.noGit()
+  const noGit = () => props.review.mode() === "turn" && props.review.noGit()
  return (
    <Switch>
      <Match when={loading()}>
@@ -38,7 +38,6 @@ import { SessionReviewToggle } from "./header/session-header-actions"
 import { createAnimatedPresence } from "@/runtime/animated-presence"
 import { createSessionBrowser } from "./browser/model"
 import { createTimelineCache } from "./timeline/cache"
-import { ArtifactMarkdownProvider, ArtifactOpenerProvider } from "./files/open-artifact"

 const SessionMobileFiles = lazy(async () => {
  const { SessionMobileFiles } = await import("./files/session-mobile-files")
@@ -51,26 +50,14 @@ const SessionSummaryPanel = lazy(async () => {
 })

 export function SessionScreen(props: { session: SessionModel }) {
-  // The timeline cache captures its owner when created, so link handling must be provided above it.
-  const browser = createSessionBrowser(props.session)
-  return (
-    <ArtifactOpenerProvider session={props.session} browser={browser}>
-      <ArtifactMarkdownProvider>
-        <SessionScreenContent session={props.session} browser={browser} />
-      </ArtifactMarkdownProvider>
-    </ArtifactOpenerProvider>
-  )
-}
-
-function SessionScreenContent(props: { session: SessionModel; browser: ReturnType<typeof createSessionBrowser> }) {
  const session = props.session
-  const browser = props.browser
  const server = useServer()
  const detailsProject = createMemo(() => {
    const info = session.data.info()
    return info ? projectForSession(info, server.ctx.sync.data.project) : undefined
  })
  const isDesktop = session.isDesktop
+  const browser = createSessionBrowser(session)
  const screen = createSessionScreenLayout(session)
  const timeline = createSessionTimelineInteraction(session)
  const timelineSearch = createTimelineSearchController({
@@ -1,8 +1,7 @@
-import { For, Show, createEffect, createMemo, on, onCleanup } from "solid-js"
+import { For, Show, createEffect, createMemo, lazy, on, onCleanup } from "solid-js"
 import { createStore } from "solid-js/store"
 import { makeEventListener } from "@solid-primitives/event-listener"
 import { Button } from "@opencode/ui/button"
-import { Icon } from "@opencode/ui/icon"
 import { IconButton } from "@opencode/ui/icon-button"
 import { TextInput } from "@opencode/ui/text-input"
 import { showToast } from "@/shell/notifications/toast"
@@ -18,6 +17,8 @@ import { useLanguage } from "@/runtime/i18n/language"
 import { useSettings } from "@/settings/model"
 import { SettingsList } from "@/settings/list"

+const Icon = lazy(() => import("@opencode/ui/icon").then((module) => ({ default: module.Icon })))
+
 const IS_MAC = typeof navigator === "object" && /(Mac|iPod|iPhone|iPad)/.test(navigator.platform)
 const PALETTE_ID = "command.palette"

@@ -1102,6 +1102,10 @@
  padding-block: 20px;
 }

+.settings-server-connection .settings-servers-lead {
+  gap: 4px;
+}
+
 .settings-servers-row:not(:last-child) {
  padding-bottom: 16px;
  margin-bottom: 16px;
@@ -1,5 +1,5 @@
 import { describe, expect, test } from "bun:test"
-import { canOpenTabRename, forwardTabRef, isTabCloseTarget } from "./tab-gesture"
+import { canOpenTabRename, canStartTabDrag, forwardTabRef, isTabCloseTarget } from "./tab-gesture"

 describe("titlebar tab gestures", () => {
  test("excludes close controls from tab gestures", () => {
@@ -24,4 +24,10 @@ describe("titlebar tab gestures", () => {
    expect(canOpenTabRename(false, false, false)).toBe(true)
    expect(canOpenTabRename(false, false, true)).toBe(false)
  })
+
+  test("preserves native panning for touch pointers", () => {
+    expect(canStartTabDrag("mouse")).toBe(true)
+    expect(canStartTabDrag("pen")).toBe(true)
+    expect(canStartTabDrag("touch")).toBe(false)
+  })
 })
@@ -4,6 +4,10 @@ export function isTabCloseTarget(target: EventTarget | null) {
  return target instanceof Element && !!target.closest('[data-slot="tab-close"]')
 }

+export function canStartTabDrag(pointerType: string) {
+  return pointerType !== "touch"
+}
+
 export function forwardTabRef(ref: Ref<HTMLDivElement> | undefined, element: HTMLDivElement) {
  if (typeof ref === "function") ref(element)
 }
@@ -9,8 +9,7 @@
  justify-content: center;
 }

-[data-titlebar-tab],
-[data-titlebar-tab-action] {
+[data-titlebar-tab] {
  --tab-base: var(--v2-background-bg-deep);
  --tab-overlay: transparent;
  background: linear-gradient(var(--tab-overlay), var(--tab-overlay)), var(--tab-base);
@@ -69,14 +68,6 @@
  --tab-overlay: var(--v2-overlay-simple-overlay-pressed);
 }

-[data-titlebar-tab-action]:is(:hover, :focus-visible) {
-  --tab-overlay: var(--v2-overlay-simple-overlay-hover);
-}
-
-[data-titlebar-tab-action]:is(:active, [data-state="pressed"]) {
-  --tab-overlay: var(--v2-overlay-simple-overlay-pressed);
-}
-
 [data-titlebar-tab]:is(:hover, [data-state="pressed"]) [data-slot="tab-close"] {
  background: linear-gradient(var(--tab-overlay), var(--tab-overlay)), var(--tab-base);
 }
@@ -328,7 +328,6 @@ export function TabNavItem(props: {

  return (
    <Menu.Context
-      modal={false}
      onOpenChange={(open) => {
        setMenu("open", open)
        if (open) setPopoverOpen(false)
@@ -16,7 +16,7 @@ import { useTabs } from "@/shell/tabs/tabs"
 import { createTabComposerState } from "@/composer/persistence"
 import { base64Encode } from "@opencode/util/encode"
 import { showToast } from "@/shell/notifications/toast"
-import { isTabCloseTarget } from "./tab-gesture"
+import { canStartTabDrag, isTabCloseTarget } from "./tab-gesture"
 import { adjacentTabKey, mergeVisibleTabOrder } from "./tab-order"
 import type { SessionInfo } from "@opencode/client/promise"

@@ -292,11 +292,9 @@ export function TitlebarTabStrip(props: {
        <DragDropProvider
          sensors={[
            PointerSensor.configure({
-              activationConstraints: (event) =>
-                event.pointerType === "touch"
-                  ? [new PointerActivationConstraints.Distance({ value: 8 })]
-                  : [new PointerActivationConstraints.Distance({ value: 4 })],
+              activationConstraints: [new PointerActivationConstraints.Distance({ value: 4 })],
              preventActivation: (event) =>
+                !canStartTabDrag(event.pointerType) ||
                isTabCloseTarget(event.target) ||
                (event.target instanceof Element && !!event.target.closest('[contenteditable="true"]')),
            }),
@@ -315,7 +313,6 @@ export function TitlebarTabStrip(props: {
            if (!source) return
            const tab = props.tabs.find((item) => tabKey(item) === source.id.toString())
            if (!tab) return
-            if (vertical()) return
            const tabEl = source.element?.querySelector<HTMLDivElement>("[data-titlebar-tab]")
            props.onNavigate(tab, tabEl ?? undefined)
          }}
@@ -351,10 +351,9 @@ export function Titlebar(props: {
              >
                <button
                  type="button"
-                  data-titlebar-tab-action
                  data-action="vertical-tabs-home"
                  data-state={layout.route().type === "home" ? "pressed" : undefined}
-                  class="group mb-1 flex h-7 w-full shrink-0 items-center gap-1.5 rounded-[6px] ps-1.5 pe-2 text-[13px] leading-4 text-v2-text-text-faint hover:text-v2-text-text-base data-[state=pressed]:text-v2-text-text-base"
+                  class="group mb-1 flex h-7 w-full shrink-0 items-center gap-1.5 rounded-[6px] ps-1.5 pe-2 text-[13px] leading-4 text-v2-text-text-faint hover:bg-v2-background-bg-layer-02 hover:text-v2-text-text-base data-[state=pressed]:bg-v2-background-bg-layer-02 data-[state=pressed]:text-v2-text-text-base"
                  onClick={toggleHome}
                  aria-label={language.t("home.title")}
                  aria-pressed={layout.route().type === "home"}
@@ -651,9 +650,8 @@ export function Titlebar(props: {
                            {homeButton(true)}
                            <button
                              type="button"
-                              data-titlebar-tab-action
                              data-action="vertical-tabs-new-session"
-                              class="group flex h-7 w-full shrink-0 items-center gap-1.5 rounded-[6px] ps-1.5 pe-2 text-[13px] leading-4 text-v2-text-text-faint hover:text-v2-text-text-base"
+                              class="group flex h-7 w-full shrink-0 items-center gap-1.5 rounded-[6px] ps-1.5 pe-2 text-[13px] leading-4 text-v2-text-text-faint hover:bg-v2-background-bg-layer-02 hover:text-v2-text-text-base"
                              onClick={openNewTab}
                              aria-label={language.t("command.session.new")}
                            >
@@ -1,118 +0,0 @@
-import { describe, expect, test } from "bun:test"
-import {
-  artifactKind,
-  bytesToBase64,
-  contentBytes,
-  fileContentFromBytes,
-  MAX_MEDIA_BYTES,
-  parseDelimited,
-  resolveArtifactPath,
-} from "./artifact"
-
-describe("artifactKind", () => {
-  test.each([
-    ["shot.PNG", "image"],
-    ["logo.svg", "svg"],
-    ["song.mp3", "audio"],
-    ["demo.mp4", "video"],
-    ["clip.webm", "video"],
-    ["paper.pdf", "pdf"],
-    ["out/index.html", "html"],
-    ["README.md", "markdown"],
-    ["flow.mmd", "mermaid"],
-    ["data.csv", "table"],
-    ["data.tsv", "table"],
-    ["Inter.woff2", "font"],
-    ["src/app.ts", "text"],
-    ["Makefile", "text"],
-    [".env", "text"],
-    ["archive.tar.gz", "text"],
-  ] as const)("classifies %s as %s", (path, kind) => {
-    expect(artifactKind(path)).toBe(kind)
-  })
-})
-
-describe("fileContentFromBytes", () => {
-  test("keeps media as base64 with a mime type", () => {
-    const content = fileContentFromBytes("a.png", new Uint8Array([137, 80, 78, 71]))
-    expect(content).toEqual({ type: "binary", content: "iVBORw==", encoding: "base64", mimeType: "image/png" })
-  })
-
-  test("decodes text and svg with a mime type", () => {
-    expect(fileContentFromBytes("a.svg", new TextEncoder().encode("<svg/>"))).toEqual({
-      type: "text",
-      content: "<svg/>",
-      mimeType: "image/svg+xml",
-    })
-    expect(fileContentFromBytes("a.ts", new TextEncoder().encode("const a = 1"))).toEqual({
-      type: "text",
-      content: "const a = 1",
-      mimeType: undefined,
-    })
-  })
-
-  test("keeps only the size of media above the cap", () => {
-    const content = fileContentFromBytes("big.mp4", new Uint8Array(MAX_MEDIA_BYTES + 1))
-    expect(content).toEqual({ type: "binary", content: "", size: MAX_MEDIA_BYTES + 1 })
-  })
-
-  test("marks unknown binaries without keeping bytes", () => {
-    expect(fileContentFromBytes("a.bin", new Uint8Array([1, 0, 2]))).toEqual({ type: "binary", content: "", size: 3 })
-  })
-
-  test("encodes large buffers in chunks", () => {
-    const bytes = new Uint8Array(70_000).fill(65)
-    expect(bytesToBase64(bytes)).toBe(Buffer.from(bytes).toString("base64"))
-  })
-})
-
-describe("contentBytes", () => {
-  test("recovers byte counts from base64 and text", () => {
-    expect(contentBytes({ type: "binary", content: "iVBORw==", encoding: "base64" })).toBe(4)
-    expect(contentBytes({ type: "binary", content: "iVBORwA=", encoding: "base64" })).toBe(5)
-    expect(contentBytes({ type: "text", content: "héllo" })).toBe(6)
-  })
-})
-
-describe("parseDelimited", () => {
-  test("handles quotes, embedded delimiters, newlines, and CRLF", () => {
-    const parsed = parseDelimited('name,note\r\n"Smith, J","says ""hi""\nand more"\nplain,\n', ",")
-    expect(parsed.rows).toEqual([
-      ["name", "note"],
-      ["Smith, J", 'says "hi"\nand more'],
-      ["plain", ""],
-    ])
-    expect(parsed.total).toBe(3)
-    expect(parsed.columns).toBe(2)
-  })
-
-  test("counts rows past the limit without keeping them", () => {
-    const parsed = parseDelimited("a\tb\n1\t2\n3\t4\n5\t6", "\t", 2)
-    expect(parsed.rows).toHaveLength(2)
-    expect(parsed.total).toBe(4)
-  })
-})
-
-describe("resolveArtifactPath", () => {
-  test.each([
-    ["docs", "guide.md", "docs/guide.md"],
-    ["docs", "./img/a.png", "docs/img/a.png"],
-    ["docs/api", "../index.md", "docs/index.md"],
-    ["", "src/app.ts", "src/app.ts"],
-    ["docs", "sub\\win.md", "docs/sub/win.md"],
-    ["", "docs/guide.md", "docs/guide.md"],
-    ["/tmp/notes/", "../out/a.pdf", "/tmp/out/a.pdf"],
-    ["C:/tmp/notes/", "img.png", "C:/tmp/notes/img.png"],
-    ["/repo", "../shared/report.pdf", "/shared/report.pdf"],
-  ])("resolves %s + %s", (base, href, expected) => {
-    expect(resolveArtifactPath(base, href)).toBe(expected)
-  })
-
-  test.each([
-    ["docs", "../../etc/passwd"],
-    ["", "../x"],
-    ["docs", "/abs/path"],
-  ])("rejects %s + %s", (base, href) => {
-    expect(resolveArtifactPath(base, href)).toBeUndefined()
-  })
-})
@@ -1,211 +0,0 @@
-import type { FileContent } from "@/runtime/server/types"
-
-export type ArtifactKind =
-  | "image"
-  | "svg"
-  | "audio"
-  | "video"
-  | "pdf"
-  | "html"
-  | "markdown"
-  | "mermaid"
-  | "table"
-  | "font"
-  | "text"
-
-const mimes = new Map([
-  ["png", "image/png"],
-  ["jpg", "image/jpeg"],
-  ["jpeg", "image/jpeg"],
-  ["gif", "image/gif"],
-  ["webp", "image/webp"],
-  ["avif", "image/avif"],
-  ["bmp", "image/bmp"],
-  ["ico", "image/x-icon"],
-  ["tif", "image/tiff"],
-  ["tiff", "image/tiff"],
-  ["heic", "image/heic"],
-  ["svg", "image/svg+xml"],
-  ["mp3", "audio/mpeg"],
-  ["wav", "audio/wav"],
-  ["ogg", "audio/ogg"],
-  ["oga", "audio/ogg"],
-  ["m4a", "audio/mp4"],
-  ["aac", "audio/aac"],
-  ["flac", "audio/flac"],
-  ["opus", "audio/ogg"],
-  ["weba", "audio/webm"],
-  ["mp4", "video/mp4"],
-  ["m4v", "video/mp4"],
-  ["webm", "video/webm"],
-  ["mov", "video/quicktime"],
-  ["ogv", "video/ogg"],
-  ["mkv", "video/x-matroska"],
-  ["pdf", "application/pdf"],
-  ["html", "text/html"],
-  ["htm", "text/html"],
-  ["md", "text/markdown"],
-  ["markdown", "text/markdown"],
-  ["mdx", "text/markdown"],
-  ["mmd", "text/vnd.mermaid"],
-  ["mermaid", "text/vnd.mermaid"],
-  ["csv", "text/csv"],
-  ["tsv", "text/tab-separated-values"],
-  ["ttf", "font/ttf"],
-  ["otf", "font/otf"],
-  ["woff", "font/woff"],
-  ["woff2", "font/woff2"],
-])
-
-export function artifactExtension(path: string) {
-  const name = path.split(/[\\/]/).pop() ?? ""
-  const index = name.lastIndexOf(".")
-  if (index <= 0) return ""
-  return name.slice(index + 1).toLowerCase()
-}
-
-export function artifactMime(path: string) {
-  return mimes.get(artifactExtension(path))
-}
-
-export function artifactKind(path: string): ArtifactKind {
-  const mime = artifactMime(path)
-  if (!mime) return "text"
-  if (mime === "image/svg+xml") return "svg"
-  if (mime === "application/pdf") return "pdf"
-  if (mime === "text/html") return "html"
-  if (mime === "text/markdown") return "markdown"
-  if (mime === "text/vnd.mermaid") return "mermaid"
-  if (mime === "text/csv" || mime === "text/tab-separated-values") return "table"
-  if (mime.startsWith("image/")) return "image"
-  if (mime.startsWith("audio/")) return "audio"
-  if (mime.startsWith("font/")) return "font"
-  return "video"
-}
-
-/** Kinds whose bytes are kept as base64 so media elements can play them without a text round trip. */
-const binaryKinds = new Set<ArtifactKind>(["image", "audio", "video", "pdf", "font"])
-
-/** Text files never contain NUL; a NUL in the first 8 KiB marks an unknown binary. */
-function isBinaryBytes(bytes: Uint8Array) {
-  return bytes.subarray(0, 8192).includes(0)
-}
-
-export function bytesToBase64(bytes: Uint8Array) {
-  const parts: string[] = []
-  for (let index = 0; index < bytes.length; index += 0x8000) {
-    parts.push(String.fromCharCode(...bytes.subarray(index, index + 0x8000)))
-  }
-  return btoa(parts.join(""))
-}
-
-/** Media above this stays a placeholder: base64 encoding on the main thread and the LRU budget both suffer. */
-export const MAX_MEDIA_BYTES = 25 * 1024 * 1024
-
-export function fileContentFromBytes(path: string, bytes: Uint8Array): FileContent {
-  const kind = artifactKind(path)
-  const mimeType = artifactMime(path)
-  if (binaryKinds.has(kind)) {
-    if (bytes.length > MAX_MEDIA_BYTES) return { type: "binary", content: "", size: bytes.length }
-    return { type: "binary", content: bytesToBase64(bytes), encoding: "base64", mimeType }
-  }
-  // Unknown binaries keep no bytes: the viewer only shows a placeholder for them.
-  if (kind === "text" && isBinaryBytes(bytes)) return { type: "binary", content: "", size: bytes.length }
-  return { type: "text", content: new TextDecoder().decode(bytes), mimeType }
-}
-
-/** Approximate on-disk size of loaded content. */
-export function contentBytes(content: FileContent) {
-  if (content.size !== undefined) return content.size
-  if (content.encoding === "base64") {
-    const padding = content.content.endsWith("==") ? 2 : content.content.endsWith("=") ? 1 : 0
-    return Math.floor((content.content.length * 3) / 4) - padding
-  }
-  return new TextEncoder().encode(content.content).length
-}
-
-/**
- * Parse RFC 4180 style delimited text. Quoted fields may contain the delimiter, newlines, and
- * doubled quotes. Rows beyond `limit` are counted but not returned.
- */
-export function parseDelimited(text: string, delimiter: string, limit = 1000) {
-  const rows: string[][] = []
-  let row: string[] = []
-  let field = ""
-  let quoted = false
-  let total = 0
-  const endRow = () => {
-    row.push(field)
-    field = ""
-    const blank = row.length === 1 && row[0] === ""
-    if (!blank) {
-      total++
-      if (rows.length < limit) rows.push(row)
-    }
-    row = []
-  }
-  for (let index = 0; index < text.length; index++) {
-    const char = text[index]!
-    if (quoted) {
-      if (char !== '"') {
-        field += char
-        continue
-      }
-      if (text[index + 1] === '"') {
-        field += '"'
-        index++
-        continue
-      }
-      quoted = false
-      continue
-    }
-    if (char === '"' && field === "") {
-      quoted = true
-      continue
-    }
-    if (char === delimiter) {
-      row.push(field)
-      field = ""
-      continue
-    }
-    if (char === "\r") continue
-    if (char === "\n") {
-      endRow()
-      continue
-    }
-    field += char
-  }
-  if (field !== "" || row.length > 0) endRow()
-  const columns = rows.reduce((max, current) => Math.max(max, current.length), 0)
-  return { rows, total, columns }
-}
-
-/** Build a blob URL from loaded content. Callers revoke it when the viewer unmounts. */
-export function blobUrlFromContent(content: FileContent) {
-  const type = content.mimeType ?? "application/octet-stream"
-  if (content.encoding !== "base64") return URL.createObjectURL(new Blob([content.content], { type }))
-  const raw = atob(content.content)
-  const bytes = Uint8Array.from(raw, (char) => char.charCodeAt(0))
-  return URL.createObjectURL(new Blob([bytes], { type }))
-}
-
-/**
- * Resolve a relative link against a directory. A relative base yields a workspace-relative path and
- * an absolute base an absolute one; undefined when the link climbs past the base's root.
- */
-export function resolveArtifactPath(base: string, href: string) {
-  const target = href.replaceAll("\\", "/")
-  if (target.startsWith("/")) return undefined
-  const dir = base.replaceAll("\\", "/")
-  const segments = [...dir.split("/").filter(Boolean)]
-  for (const segment of target.split("/")) {
-    if (!segment || segment === ".") continue
-    if (segment !== "..") {
-      segments.push(segment)
-      continue
-    }
-    if (segments.length === 0) return undefined
-    segments.pop()
-  }
-  return `${dir.startsWith("/") ? "/" : ""}${segments.join("/")}`
-}
@@ -5,12 +5,11 @@ import { createSimpleContext } from "@opencode/ui/context"
 import { showToast } from "@/shell/notifications/toast"
 import { useParams } from "@solidjs/router"
 import { base64Encode } from "@opencode/util/encode"
-import { getDirectory, getFilename } from "@opencode/util/path"
+import { getFilename } from "@opencode/util/path"
 import { useWorkspaceLocation } from "@/workspaces/location"
 import { useLanguage } from "@/runtime/i18n/language"
 import { useLayout } from "@/shell/state/layout"
 import { createPathHelpers } from "./path"
-import { fileContentFromBytes } from "./artifact"
 import {
  approxBytes,
  evictContentLru,
@@ -186,17 +185,14 @@ export const { use: useFile, provider: FileProvider } = createSimpleContext({

      setLoading(file)

-      // Files outside the workspace are read from their own directory, like markdown images.
-      // The trailing separator from getDirectory keeps "/" and "C:/" valid, like readLocalImage.
-      const request = path.absolute(file)
-        ? { path: getFilename(file), location: { directory: getDirectory(file) } }
-        : { path: file, location: { directory } }
      const promise = serverSDK.api.file
-        .read(request)
+        .read({ path: file, location: { directory } })
        .then((data) => {
          if (scope() !== directory) return
-          const content = fileContentFromBytes(file, data)
+          const content = { type: "text" as const, content: new TextDecoder().decode(data) }
          setLoaded(file, content)
+
+          if (!content) return
          touchFileContent(file, approxBytes(content))
          evictContent(new Set([file]))
        })
@@ -285,7 +281,6 @@ export const { use: useFile, provider: FileProvider } = createSimpleContext({
    return {
      ready: () => view().ready(),
      normalize: path.normalize,
-      absolute: path.absolute,
      tab: path.tab,
      pathFromTab: path.pathFromTab,
      tree: {
@@ -21,24 +21,6 @@ describe("file path helpers", () => {
    expect(path.normalize("c:\\repo\\src\\app.ts")).toBe("src\\app.ts")
  })

-  test("keeps files outside the workspace absolute and round-trips them through tabs", () => {
-    const posix = createPathHelpers(() => "/repo")
-    expect(posix.normalize("/tmp/out/report.pdf")).toBe("/tmp/out/report.pdf")
-    expect(posix.absolute("/tmp/out/report.pdf")).toBe(true)
-    expect(posix.absolute("src/app.ts")).toBe(false)
-    expect(posix.tab("/tmp/out/report.pdf")).toBe("file:///tmp/out/report.pdf")
-    expect(posix.pathFromTab("file:///tmp/out/report.pdf")).toBe("/tmp/out/report.pdf")
-    expect(posix.normalize("/repository/x.ts")).toBe("/repository/x.ts")
-
-    const windows = createPathHelpers(() => "C:\\repo")
-    expect(windows.normalize("C:\\tmp\\font.ttf")).toBe("C:\\tmp\\font.ttf")
-    expect(windows.normalize("file:///C:/tmp/font.ttf")).toBe("C:/tmp/font.ttf")
-    expect(windows.absolute("C:/tmp/font.ttf")).toBe(true)
-    expect(windows.tab("C:/tmp/font.ttf")).toBe("file:///C:/tmp/font.ttf")
-    expect(windows.pathFromTab("file:///C:/tmp/font.ttf")).toBe("C:/tmp/font.ttf")
-    expect(windows.pathFromTab("file:///C:/repo/src/app.ts")).toBe("src/app.ts")
-  })
-
  test("normalizes Windows directory separators", () => {
    const path = createPathHelpers(() => "C:\\repo")
    expect(path.normalizeDir("frontend\\")).toBe("frontend")
@@ -105,11 +105,7 @@ export function createPathHelpers(scope: () => string) {
  const normalize = (input: string) => {
    const root = scope()

-    // file:///C:/dir becomes /C:/dir once the protocol is gone; restore the drive form.
-    let path = unquoteGitPath(decodeFilePath(stripQueryAndHash(stripFileProtocol(input)))).replace(
-      /^[/\\]([A-Za-z]:)/,
-      "$1",
-    )
+    let path = unquoteGitPath(decodeFilePath(stripQueryAndHash(stripFileProtocol(input))))

    // Separator-agnostic prefix stripping for Cygwin/native Windows compatibility
    // Only case-insensitive on Windows (drive letter or UNC paths)
@@ -120,21 +116,20 @@ export function createPathHelpers(scope: () => string) {
      canonPath.startsWith(canonRoot) &&
      (canonRoot.endsWith("/") || canonPath === canonRoot || canonPath[canonRoot.length] === "/")
    ) {
-      // Slice from original path to preserve native separators, then drop the separator itself.
-      path = path.slice(root.length).replace(/^[/\\]/, "")
+      // Slice from original path to preserve native separators
+      path = path.slice(root.length)
    }

    if (path.startsWith("./") || path.startsWith(".\\")) {
      path = path.slice(2)
    }

-    // An absolute path that is not under the root stays absolute; it is a file outside the workspace.
+    if (path.startsWith("/") || path.startsWith("\\")) {
+      path = path.slice(1)
+    }
    return path
  }

-  /** Whether a normalized path points outside the workspace root. */
-  const absolute = (path: string) => /^[A-Za-z]:[/\\]/.test(path) || path.startsWith("/") || path.startsWith("\\\\")
-
  const tab = (input: string) => {
    const path = normalize(input)
    return `file://${encodeFilePath(path)}`
@@ -154,7 +149,6 @@ export function createPathHelpers(scope: () => string) {

  return {
    normalize,
-    absolute,
    tab,
    pathFromTab,
    normalizeDir,
@@ -1,5 +1,4 @@
 import { readFileSync } from "node:fs"
-import { createRequire } from "node:module"
 import solidPlugin from "vite-plugin-solid"
 import tailwindcss from "@tailwindcss/vite"
 import { fileURLToPath } from "url"
@@ -18,24 +17,6 @@ if (tailwindGenerate && typeof tailwindHotUpdate === "function") {
  }
 }

-// The markdown worker imports these directly, so they are served unbundled to keep worker startup
-// stable. Vite applies `exclude` to every import inside a pre-bundle too, which would leave a bare
-// `import "marked"` in mermaid's chunk that the browser cannot resolve from this package.
-const workerDeps = ["@shikijs/stream", "marked", "marked-shiki", "remend"]
-
-/** @type {import("rolldown").Plugin} */
-const bundleNestedWorkerDeps = {
-  name: "opencode-desktop:bundle-nested-worker-deps",
-  resolveId(id, importer) {
-    if (!importer || !workerDeps.includes(id) || !importer.includes("node_modules")) return
-    try {
-      return createRequire(importer).resolve(id)
-    } catch {
-      return
-    }
-  },
-}
-
 export const channel = (() => {
  const raw = process.env.OPENCODE_CHANNEL
  if (raw === "local" || raw === "dev" || raw === "beta" || raw === "prod") return raw
@@ -63,9 +44,8 @@ export default [
          format: "es",
        },
        optimizeDeps: {
-          exclude: workerDeps,
+          exclude: ["@shikijs/stream", "marked", "marked-shiki", "remend"],
          include: ["@opencode/session-ui > mermaid", "@opencode/session-ui > mermaid > katex"],
-          rolldownOptions: { plugins: [bundleNestedWorkerDeps] },
        },
      }
    },
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/cli",
-  "version": "2.0.12",
+  "version": "2.0.8",
  "type": "module",
  "license": "MIT",
  "bin": {
@@ -1,120 +0,0 @@
-#!/usr/bin/env bun
-import { Script } from "@opencode/script"
-import { $ } from "bun"
-import { mkdir, rm } from "node:fs/promises"
-import path from "node:path"
-import { fileURLToPath } from "node:url"
-import { UpdateArtifact } from "../../../script/update-artifact"
-
-if (Script.channel !== "beta" && Script.channel !== "latest") {
-  throw new Error("Homebrew publishing requires the beta or latest channel")
-}
-const valid =
-  Script.channel === "beta"
-    ? /^\d+\.\d+\.\d+-beta[.-]\d+(?:\.\d+)?$/.test(Script.version)
-    : /^\d+\.\d+\.\d+$/.test(Script.version)
-if (!valid) throw new Error(`Expected a ${Script.channel} release version`)
-
-const dir = fileURLToPath(new URL("..", import.meta.url))
-const root = path.resolve(process.env.OPENCODE_CLI_DIST ?? path.join(dir, "dist"))
-const outdir = path.join(root, "homebrew-tap")
-const dryRun = process.argv.includes("--dry-run")
-const name = Script.channel === "beta" ? "opencode-beta" : "opencode-v2"
-const formulaClass = Script.channel === "beta" ? "OpencodeBeta" : "OpencodeV2"
-
-const targets = await Promise.all(
-  [
-    { name: "darwin-arm64", archive: "zip" },
-    { name: "darwin-x64-baseline", archive: "zip" },
-    { name: "linux-arm64", archive: "tar.gz" },
-    { name: "linux-x64-baseline", archive: "tar.gz" },
-  ].map(async (target) => {
-    const filename = `opencode-${target.name}.${target.archive}`
-    const file = Bun.file(path.join(root, filename))
-    if (!(await file.exists()) || !file.size) throw new Error(`Missing Homebrew archive: ${filename}`)
-    const sha256 = new Bun.CryptoHasher("sha256")
-    for await (const chunk of file.stream()) sha256.update(chunk)
-    return {
-      ...target,
-      url: `https://opencode.ai/files/bin/${encodeURIComponent(Script.version)}/${filename}`,
-      sha256: sha256.digest("hex"),
-    }
-  }),
-)
-
-await rm(outdir, { recursive: true, force: true })
-if (dryRun) await mkdir(outdir, { recursive: true })
-if (!dryRun) {
-  const token = process.env.GITHUB_TOKEN
-  if (!token) throw new Error("GITHUB_TOKEN is required to update the Homebrew tap")
-  await $`git clone ${`https://x-access-token:${token}@github.com/anomalyco/homebrew-tap.git`} ${outdir}`
-  await $`git checkout -B master`.cwd(outdir)
-}
-
-const target = (name: string) => {
-  const result = targets.find((item) => item.name === name)
-  if (!result) throw new Error(`Missing Homebrew target: ${name}`)
-  return result
-}
-const macArm = target("darwin-arm64")
-const macIntel = target("darwin-x64-baseline")
-const linuxArm = target("linux-arm64")
-const linuxIntel = target("linux-x64-baseline")
-
-await Bun.write(
-  path.join(outdir, `${name}.rb`),
-  [
-    "# typed: false",
-    "# frozen_string_literal: true",
-    "",
-    `class ${formulaClass} < Formula`,
-    `  desc "OpenCode V2${Script.channel === "beta" ? " beta" : ""} - the AI coding agent for the terminal"`,
-    '  homepage "https://github.com/anomalyco/opencode"',
-    `  version "${Script.version}"`,
-    '  license "MIT"',
-    "",
-    '  depends_on "ripgrep"',
-    '  conflicts_with "opencode", because: "both install an opencode binary"',
-    "",
-    "  on_macos do",
-    "    if Hardware::CPU.arm?",
-    `      url "${macArm.url}"`,
-    `      sha256 "${macArm.sha256}"`,
-    "    else",
-    `      url "${macIntel.url}"`,
-    `      sha256 "${macIntel.sha256}"`,
-    "    end",
-    "  end",
-    "",
-    "  on_linux do",
-    "    if Hardware::CPU.arm?",
-    `      url "${linuxArm.url}"`,
-    `      sha256 "${linuxArm.sha256}"`,
-    "    else",
-    `      url "${linuxIntel.url}"`,
-    `      sha256 "${linuxIntel.sha256}"`,
-    "    end",
-    "  end",
-    "",
-    "  def install",
-    '    bin.install "opencode"',
-    "  end",
-    "end",
-    "",
-  ].join("\n"),
-)
-console.log(`Prepared ${name} ${Script.version} in ${outdir}`)
-if (dryRun) process.exit(0)
-
-await $`git add ${name + ".rb"}`.cwd(outdir)
-if ((await $`git diff --cached --quiet`.cwd(outdir).nothrow()).exitCode !== 0) {
-  await $`git commit -m ${`chore: update ${name} to ${Script.version}`}`.cwd(outdir)
-  await $`git push origin master`.cwd(outdir)
-}
-await UpdateArtifact.publish({
-  channel: Script.channel,
-  name: "cli",
-  distribution: "homebrew",
-  version: Script.version,
-  metadata: { package: `anomalyco/tap/${name}` },
-})
@@ -149,10 +149,6 @@ if (Script.channel === "latest" && Script.release && !dryRun) {

 if ((Script.channel === "beta" || Script.channel === "latest") && Script.release) {
  await $`bun ./script/publish-aur.ts ${dryRun ? ["--dry-run"] : []}`.env({ ...process.env, OPENCODE_CLI_DIST: root })
-  await $`bun ./script/publish-homebrew.ts ${dryRun ? ["--dry-run"] : []}`.env({
-    ...process.env,
-    OPENCODE_CLI_DIST: root,
-  })
 }

 async function archive(bin: string, target: string, binary: string, directory: string) {
@@ -55,7 +55,7 @@ try {
  if ((await pluginIDs(info.url, headers)).includes("smoke")) throw new Error("Smoke plugin existed before creation")
  const plugin = path.join(root, ".opencode", "plugins", "smoke.ts")
  await fs.writeFile(plugin, pluginSource())
-  await waitForPlugin(info.url, headers, plugin)
+  await waitForPlugin(info.url, headers)

  const unauthorizedInfo = await fetch(new URL("/api/info", info.url), {
    signal: AbortSignal.timeout(5_000),
@@ -139,13 +139,7 @@ async function waitForReady(url: string, headers: HeadersInit) {
 }

 function exitsWithin(process: Bun.Subprocess, milliseconds: number) {
-  return new Promise<boolean>((resolve) => {
-    const timeout = setTimeout(() => resolve(false), milliseconds)
-    process.exited.then(() => {
-      clearTimeout(timeout)
-      resolve(true)
-    })
-  })
+  return Promise.race([process.exited.then(() => true), Bun.sleep(milliseconds).then(() => false)])
 }

 function pluginSource() {
@@ -165,15 +159,11 @@ async function pluginIDs(url: string, headers: HeadersInit) {
  )
 }

-async function waitForPlugin(url: string, headers: HeadersInit, plugin: string) {
+async function waitForPlugin(url: string, headers: HeadersInit) {
  const deadline = Date.now() + 10_000
-  let attempt = 0
  while (Date.now() < deadline) {
    if ((await pluginIDs(url, headers)).includes("smoke")) return
    await Bun.sleep(25)
-    // Native watchers may coalesce a single creation edge. Keep changing valid source so
-    // the smoke proves that a later native event is delivered.
-    if (++attempt % 10 === 0) await fs.writeFile(plugin, `${pluginSource()}// watcher retry ${attempt}\n`)
  }
  throw new Error("Compiled service did not discover the created plugin")
 }
@@ -1,9 +1,8 @@
 import { OpenCode } from "@opencode/client"
 import { Service } from "@opencode/client/effect/service"
 import { Session } from "@opencode/schema/session"
-import { SessionMessage } from "@opencode/schema/session-message"
 import { SessionTransfer } from "@opencode/schema/session-transfer"
-import { Effect, Option, Predicate, Schema } from "effect"
+import { Effect, Option, Schema } from "effect"
 import { EOL } from "node:os"
 import path from "node:path"
 import { Commands } from "../../commands"
@@ -24,13 +23,7 @@ export default Runtime.handler(
      catch: (cause) =>
        new Error(`Failed to read session data: ${cause instanceof Error ? cause.message : String(cause)}`),
    })
-    const raw = yield* Schema.decodeUnknownEffect(Schema.fromJsonString(Schema.Unknown))(text)
-    // Exports written before provider blobs were renamed to `native` still carry the old keys.
-    const data = yield* Schema.decodeUnknownEffect(SessionTransfer.Data)(
-      Predicate.isObject(raw) && Array.isArray(raw.messages)
-        ? { ...raw, messages: raw.messages.map(SessionMessage.persisted) }
-        : raw,
-    )
+    const data = yield* Schema.decodeUnknownEffect(Schema.fromJsonString(SessionTransfer.Data))(text)
    const encoded = Schema.encodeSync(SessionTransfer.Data)(data)
    const server = yield* ServerConnection.resolve({
      server: Option.getOrUndefined(input.server),
@@ -5,77 +5,34 @@ import { Runtime } from "../../framework/runtime"
 import { Updater } from "../../services/updater"
 import { handlePromptErrors } from "../../ui/prompt"
 import { OPENCODE_VERSION } from "../../version"
-import { stripVTControlCharacters } from "node:util"

 export default Runtime.handler(
  Commands.commands.upgrade,
-  Effect.fn("cli.upgrade")(
-    function* (input) {
-      intro("Upgrade")
-      const updater = yield* Updater.Service
-      const method = Option.getOrUndefined(input.method) ?? (yield* updater.method())
-      if (!method)
-        return yield* Effect.fail(
-          new Error("Could not detect the installation method. Pass --method to choose how to upgrade OpenCode."),
-        )
-
-      log.info(`Using method: ${method}`)
-      const target = Option.getOrUndefined(input.target) ?? (yield* updater.latest())
-      const version = target.trim().replace(/^v/, "")
-      if (version === OPENCODE_VERSION) {
-        log.warn(`OpenCode upgrade skipped: ${version} is already installed`)
-        outro("Done")
-        return
-      }
-
-      log.info(`From ${OPENCODE_VERSION} → ${version}`)
-      const progress = spinner()
-      progress.start("Upgrading...")
-      yield* updater.upgrade(method, target).pipe(
-        Effect.tap(() => Effect.sync(() => progress.stop("Upgrade complete"))),
-        Effect.tapCause(() => Effect.sync(() => progress.stop("Upgrade failed", 1))),
+  Effect.fn("cli.upgrade")(function* (input) {
+    intro("Upgrade")
+    const updater = yield* Updater.Service
+    const method = Option.getOrUndefined(input.method) ?? (yield* updater.method())
+    if (!method)
+      return yield* Effect.fail(
+        new Error("Could not detect the installation method. Pass --method to choose how to upgrade OpenCode."),
      )
+
+    log.info(`Using method: ${method}`)
+    const target = Option.getOrUndefined(input.target) ?? (yield* updater.latest())
+    const version = target.trim().replace(/^v/, "")
+    if (version === OPENCODE_VERSION) {
+      log.warn(`OpenCode upgrade skipped: ${version} is already installed`)
      outro("Done")
-    },
-    (effect) =>
-      handlePromptErrors(
-        effect.pipe(
-          Effect.mapError((error) =>
-            error instanceof Updater.UpgradeError ? new Error(formatUpgradeError(error), { cause: error }) : error,
-          ),
-        ),
-      ),
-  ),
+      return
+    }
+
+    log.info(`From ${OPENCODE_VERSION} → ${version}`)
+    const progress = spinner()
+    progress.start("Upgrading...")
+    yield* updater.upgrade(method, target).pipe(
+      Effect.tap(() => Effect.sync(() => progress.stop("Upgrade complete"))),
+      Effect.tapCause(() => Effect.sync(() => progress.stop("Upgrade failed", 1))),
+    )
+    outro("Done")
+  }, handlePromptErrors),
 )
-
-function formatUpgradeError(error: Updater.UpgradeError) {
-  const clean = (value: string) => stripVTControlCharacters(value).replaceAll("\r", "").trim()
-  const line = (value: string) => clean(value).replace(/\s+/g, " ")
-  const detail = wrap(clean(error.detail), Math.max(24, (process.stdout.columns ?? 80) - 7)).join("\n")
-  return [
-    line(error.title),
-    "",
-    detail,
-    ...(error.command ? ["", field("Command", line(error.command))] : []),
-    field("Retry", line(error.retry)),
-  ].join("\n")
-}
-
-function field(label: string, value: string) {
-  const prefix = label.padEnd(9)
-  const width = Math.max(24, Math.min(61, (process.stdout.columns ?? 80) - prefix.length - 10))
-  const lines = wrap(value, width)
-  return lines.map((line, index) => `${index === 0 ? prefix : " ".repeat(prefix.length)}${line}`).join("\n")
-}
-
-function wrap(value: string, width: number) {
-  return value.split("\n").flatMap((source) => {
-    if (source.length <= width) return [source]
-    return source.split(/\s+/).reduce<string[]>((result, word) => {
-      const index = result.length - 1
-      if (index < 0 || result[index].length + word.length + 1 > width) result.push(word)
-      else result[index] += ` ${word}`
-      return result
-    }, [])
-  })
-}
@@ -7,7 +7,7 @@ import { produce, type Draft } from "immer"
 import { applyEdits, modify, parse, type ParseError } from "jsonc-parser"
 import path from "path"
 import { ConfigMigration } from "./migrate"
-import { Info, normalizeLegacyTabs, SchemaURL } from "./schema"
+import { Info, SchemaURL } from "./schema"

 export * from "./schema"

@@ -119,7 +119,7 @@ function merge(...values: readonly (Info | undefined)[]) {
  return Option.getOrElse(
    decode(
      values.reduce<Record<string, unknown>>(
-        (result, value) => mergeRecords(result, normalizeLegacyTabs(value) ?? {}),
+        (result, value) => mergeRecords(result, value ?? {}),
        {},
      ),
    ),
@@ -8,11 +8,3 @@ export const Info = Schema.Struct({
  ...Config.Info.fields,
 })
 export type Info = Schema.Schema.Type<typeof Info>
-
-export function normalizeLegacyTabs(info: Info | undefined) {
-  if (info?.tabs?.enabled === undefined) return info
-  const tabs = { ...info.tabs }
-  tabs.mode ??= tabs.enabled ? "on" : "off"
-  delete tabs.enabled
-  return { ...info, tabs }
-}
@@ -1,8 +1,7 @@
 #!/usr/bin/env bun

 import { NodeRuntime, NodeServices } from "@effect/platform-node"
-import { Cause, Effect } from "effect"
-import { getErrorReported } from "effect/Runtime"
+import { Effect } from "effect"
 import { Commands } from "./commands/commands"
 import { Runtime } from "./framework/runtime"
 import { Observability } from "@opencode/util/observability"
@@ -131,15 +130,5 @@ Effect.gen(function* () {
  Effect.provide(NodeServices.layer),
  Effect.scoped,
  Effect.tap(() => Effect.sync(() => process.exit(process.exitCode ?? 0))),
-  // runMain's default reporter logs the fatal cause to stdout. Write it to stderr instead: the
-  // desktop and `Service.ensure` only capture stderr from `serve --service`, so this is the only
-  // channel through which a startup failure's reason reaches the user.
-  Effect.tapCause((cause) =>
-    Effect.sync(() => {
-      if (Cause.hasInterruptsOnly(cause)) return
-      if (!getErrorReported(Cause.squash(cause))) return
-      process.stderr.write(Cause.pretty(cause) + "\n")
-    }),
-  ),
-  NodeRuntime.runMain({ disableErrorReporting: true }),
+  NodeRuntime.runMain,
 )
@@ -564,7 +564,7 @@ export async function runNonInteractivePrompt(input: Input) {
            messageID: message.id,
            type: "reasoning",
            text,
-            metadata: item.native,
+            metadata: item.state,
            time: { start: message.time.created, end: timestamp },
          }
          renderedReasoning.set(key, item.text)
@@ -1,96 +1,17 @@
 import { Global } from "@opencode/util/global"
 import { AppProcess } from "@opencode/util/process"
 import { OPENCODE_ARTIFACT, OPENCODE_CHANNEL, OPENCODE_LOCAL, OPENCODE_VERSION } from "../version"
-import { Context, Duration, Effect, FileSystem, Layer, Option, Ref, Schema } from "effect"
+import { Context, Duration, Effect, FileSystem, Layer, Ref } from "effect"
 import { ChildProcess } from "effect/unstable/process"
 import { parse, type ParseError } from "jsonc-parser"
 import path from "node:path"
-import { stripVTControlCharacters } from "node:util"
 import { action, parseReleaseVersion, type Policy } from "./updater-action"
-import { errorMessage } from "../util/error"
-
-export const methods = ["curl", "npm", "pnpm", "bun", "yarn", "vp", "brew"] as const

+export const methods = ["curl", "npm", "pnpm", "bun", "yarn"] as const
 export type Method = (typeof methods)[number]
 export type RunResult = { readonly type: "available" | "installed"; readonly version: string }
 export type CheckResult = RunResult | { readonly type: "unavailable"; readonly message: string }

-export class UpgradeError extends Error {
-  readonly title: string
-  readonly detail: string
-  readonly command?: string
-  readonly retry: string
-
-  constructor(
-    input: {
-      readonly title: string
-      readonly detail: string
-      readonly command?: string
-      readonly retry: string
-    },
-    options?: ErrorOptions,
-  ) {
-    super(input.detail, options)
-    this.name = "UpgradeError"
-    this.title = input.title
-    this.detail = input.detail
-    this.command = input.command
-    this.retry = input.retry
-  }
-}
-
-const decodeVpPackages = Schema.decodeUnknownOption(
-  Schema.fromJsonString(Schema.Array(Schema.Struct({ name: Schema.String }))),
-)
-
-const installNames: Record<Method, string> = {
-  curl: "The OpenCode installer",
-  npm: "npm",
-  pnpm: "pnpm",
-  bun: "Bun",
-  yarn: "Yarn",
-  vp: "Vite+",
-  brew: "Homebrew",
-}
-
-function conciseDetail(input: string) {
-  const lines = stripVTControlCharacters(input)
-    .trim()
-    .replaceAll("\r", "\n")
-    .split("\n")
-    .map((line) => line.trimEnd())
-    .filter((line) => line.trim().length > 0)
-  const tail = lines.slice(-12).join("\n")
-  const clipped = tail.length > 2_000
-  const detail = clipped ? `…${tail.slice(-1_999)}` : tail
-  if (!detail) return
-  if (lines.length <= 12 && !clipped) return detail
-  return `${detail}\n\nOutput shortened to the last 12 lines.`
-}
-
-function errorDetail(cause: unknown): string {
-  if (cause instanceof AppProcess.AppProcessError) {
-    const stderr = conciseDetail(cause.stderr ?? "")
-    if (stderr) return stderr
-    if (cause.cause !== undefined) return errorDetail(cause.cause)
-    return cause.message
-  }
-  if (cause instanceof Error) {
-    const detail = cause.cause === undefined ? undefined : errorDetail(cause.cause)
-    if (!detail || detail === cause.message) return cause.message
-    return `${cause.message}: ${detail}`
-  }
-  return errorMessage(cause)
-}
-
-function resultDetail(result: { code: number; stdout: string; stderr: string }) {
-  return (
-    conciseDetail(result.stderr) ??
-    conciseDetail(result.stdout) ??
-    `The command exited with code ${result.code} without any error output.`
-  )
-}
-
 export interface Interface {
  readonly run: (onInstall?: (version: string) => void) => Effect.Effect<RunResult | undefined>
  readonly check: () => Effect.Effect<CheckResult | undefined, Error>
@@ -98,9 +19,9 @@ export interface Interface {
  readonly method: () => Effect.Effect<Method | undefined>
  readonly latest: () => Effect.Effect<string, Error>
  readonly upgrade: (method: Method, version: string) => Effect.Effect<void, Error>
-  readonly removal: (
-    method: Method,
-  ) => { readonly command: ReadonlyArray<string>; readonly run: Effect.Effect<void, Error> } | undefined
+  readonly removal: (method: Method) =>
+    | { readonly command: ReadonlyArray<string>; readonly run: Effect.Effect<void, Error> }
+    | undefined
 }

 export class Service extends Context.Service<Service, Interface>()("@opencode/cli/Updater") {}
@@ -163,6 +84,7 @@ const make = Effect.gen(function* () {
          stdout: result.stdout.toString("utf8"),
          stderr: result.stderr.toString("utf8"),
        })),
+        Effect.orElseSucceed(() => ({ code: 1, stdout: "", stderr: "" })),
      )
  })

@@ -174,13 +96,6 @@ const make = Effect.gen(function* () {
      process.platform === "win32" ? "opencode.exe" : "opencode",
    )
    if (path.resolve(process.execPath) === path.resolve(binary)) 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 (!installedPackage) return

    const checks: ReadonlyArray<{ method: Method; command: string[] }> = [
@@ -188,149 +103,72 @@ const make = Effect.gen(function* () {
      { method: "pnpm", command: ["pnpm", "list", "-g", "--depth=0", installedPackage] },
      { method: "bun", command: ["bun", "pm", "ls", "-g"] },
      { method: "yarn", command: ["yarn", "global", "list"] },
-      { method: "vp", command: ["vp", "list", "-g", "--json", installedPackage] },
    ]
    const results = yield* Effect.forEach(
      checks,
-      (check) =>
-        exec(check.command).pipe(
-          Effect.orElseSucceed(() => ({ code: 1, stdout: "", stderr: "" })),
-          Effect.map((result) => ({ check, result })),
-        ),
+      (check) => exec(check.command).pipe(Effect.map((result) => ({ check, result }))),
      { concurrency: "unbounded" },
    )
-    return results.find((result) => {
-      if (result.check.method !== "vp") return result.result.stdout.includes(installedPackage)
-      // Vite+ repeats the filter in its successful no-match message, so substring detection would be a false positive.
-      return Option.exists(decodeVpPackages(result.result.stdout), (packages) =>
-        packages.some((item) => item.name === installedPackage),
-      )
-    })?.check.method
+    return results.find((result) => result.result.stdout.includes(installedPackage))?.check.method
  })

  const removal = (method: Method) => {
-    if (method === "curl" || method === "brew" || !installedPackage) return undefined
+    if (method === "curl" || !installedPackage) return undefined
    const commands = {
      npm: ["npm", "uninstall", "--global", installedPackage],
      pnpm: ["pnpm", "remove", "--global", installedPackage],
      bun: ["bun", "remove", "--global", installedPackage],
      yarn: ["yarn", "global", "remove", installedPackage],
-      vp: ["vp", "uninstall", "-g", installedPackage],
    }
    const command = commands[method]
    return {
      command,
      run: exec(command, "5 minutes").pipe(
-        Effect.flatMap((result) => (result.code === 0 ? Effect.void : Effect.fail(new Error(resultDetail(result))))),
+        Effect.flatMap((result) =>
+          result.code === 0
+            ? Effect.void
+            : Effect.fail(new Error(result.stderr.trim() || `Failed to uninstall with ${method}`)),
+        ),
      ),
    }
  }

-  const release = Effect.fnUntraced(function* (method?: Method) {
-    const distribution = method === "brew" ? "homebrew" : "npm"
+  const release = Effect.fnUntraced(function* () {
    const response = yield* Effect.tryPromise({
      try: (signal) =>
        fetch(
-          `https://opencode.ai/update/api/${encodeURIComponent(channel)}/${encodeURIComponent(OPENCODE_ARTIFACT)}/${distribution}?current=${encodeURIComponent(OPENCODE_VERSION)}`,
+          `https://opencode.ai/update/api/${encodeURIComponent(channel)}/${encodeURIComponent(OPENCODE_ARTIFACT)}/npm?current=${encodeURIComponent(OPENCODE_VERSION)}`,
          {
            signal: AbortSignal.any([signal, AbortSignal.timeout(10_000)]),
          },
        ),
-      catch: (cause) =>
-        new UpgradeError(
-          {
-            title: "Could not check for OpenCode updates",
-            detail: errorDetail(cause),
-            retry: "Check your network, then run opencode upgrade again.",
-          },
-          { cause },
-        ),
+      catch: (cause) => new Error("Failed to check for updates", { cause }),
    })
-    if (!response.ok)
-      return yield* Effect.fail(
-        new UpgradeError({
-          title: "Could not check for OpenCode updates",
-          detail: `The update service returned HTTP ${response.status}.`,
-          retry: "Try again in a few minutes.",
-        }),
-      )
+    if (!response.ok) return yield* Effect.fail(new Error(`Update check failed with status ${response.status}`))
    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 },
-        ),
+      catch: (cause) => new Error("Failed to read update information", { cause }),
    })
-    if (!data.metadata?.package)
-      return yield* Effect.fail(
-        new UpgradeError({
-          title: "Could not read the OpenCode update information",
-          detail: "The update service returned incomplete release information.",
-          retry: "Try again in a few minutes.",
-        }),
-      )
+    if (!data.metadata?.package) return yield* Effect.fail(new Error("Update information did not include a package"))
    return { package: data.metadata.package, version: data.version }
  })

-  const latest = () =>
-    method().pipe(
-      Effect.flatMap(release),
-      Effect.map((data) => data.version),
-    )
+  const latest = () => release().pipe(Effect.map((data) => data.version))

  const temporaryDirectory = (prefix: string) =>
    Effect.acquireRelease(fs.makeTempDirectory({ directory: global.cache, prefix }), (directory) =>
      fs.remove(directory, { recursive: true, force: true }).pipe(Effect.ignore),
    )

-  const runUpgrade = (input: {
-    readonly method: Method
-    readonly command: string[]
-    readonly displayCommand?: string[]
-    readonly title?: string
-    readonly retry?: string
-  }) => {
-    const failure = (detail: string, cause?: unknown) =>
-      new UpgradeError(
-        {
-          title: input.title ?? `${installNames[input.method]} could not install OpenCode`,
-          detail,
-          command: (input.displayCommand ?? input.command).join(" "),
-          retry: input.retry ?? "Fix the issue above, then run opencode upgrade again.",
-        },
-        cause === undefined ? undefined : { cause },
-      )
-    return exec(input.command, "5 minutes").pipe(
-      Effect.flatMap((result) =>
-        result.code === 0 ? Effect.succeed(result) : Effect.fail(failure(resultDetail(result))),
-      ),
-      Effect.mapError((cause) =>
-        cause instanceof UpgradeError
-          ? cause
-          : failure(
-              cause instanceof AppProcess.AppProcessError && cause.stderr === undefined && cause.cause === undefined
-                ? `Failed to update with ${input.method}`
-                : errorDetail(cause),
-              cause,
-            ),
-      ),
-    )
-  }
-
  const upgrade = Effect.fnUntraced(function* (method: Method, input: string) {
    if (!parseReleaseVersion(input)) return yield* Effect.fail(new Error(`Invalid version: ${input}`))
    const version = input.trim().replace(/^v/, "")
-    const packageName = (yield* release(method)).package
+    const packageName = (yield* release()).package
    const target = `${packageName}@${version}`
    if (installedPackage && packageName !== installedPackage && (method === "pnpm" || method === "yarn")) {
      return yield* Effect.fail(new Error(`Reinstall ${target} with ${method} to migrate from ${installedPackage}.`))
    }
-    const commands: Record<Exclude<Method, "bun" | "curl" | "brew">, string[]> = {
+    const commands: Record<Exclude<Method, "bun" | "curl">, string[]> = {
      // Keep the old package: uninstalling it can unlink the replacement command.
      npm: [
        "npm",
@@ -344,59 +182,31 @@ const make = Effect.gen(function* () {
      ],
      pnpm: ["pnpm", "add", "--global", `--allow-build=${packageName}`, target],
      yarn: ["yarn", "global", "add", target],
-      vp:
-        installedPackage && packageName !== installedPackage
-          ? ["vp", "install", "-g", "--force", target]
-          : ["vp", "update", "-g", target],
    }
-    yield* Effect.scoped(
+    const result = yield* Effect.scoped(
      Effect.gen(function* () {
        if (method === "bun") {
          // Bun does not prune old versions from its shared package cache.
          yield* fs.makeDirectory(global.cache, { recursive: true })
          const cache = yield* temporaryDirectory("update-")
-          return yield* runUpgrade({
-            method,
-            command: ["bun", "install", "--global", "--trust", "--cache-dir", cache, target],
-            displayCommand: ["bun", "install", "--global", "--trust", target],
-          })
+          return yield* exec(["bun", "install", "--global", "--trust", "--cache-dir", cache, target], "5 minutes")
        }
        if (method === "curl") {
          yield* fs.makeDirectory(global.cache, { recursive: true })
          const directory = yield* temporaryDirectory("update-")
          const installer = path.join(directory, "install")
-          yield* runUpgrade({
-            method,
-            command: ["curl", "-fsSL", "-o", installer, "https://opencode.ai/v2/install"],
-            displayCommand: ["curl", "-fsSL", "https://opencode.ai/v2/install"],
-            title: "Could not download the OpenCode installer",
-            retry: "Check your network, then run opencode upgrade again.",
-          })
-          return yield* runUpgrade({
-            method,
-            command: ["bash", installer, "--version", version, "--no-modify-path"],
-            displayCommand: ["opencode", "upgrade", version, "--method", "curl"],
-            title: "The OpenCode installer failed",
-          })
+          const download = yield* exec(
+            ["curl", "-fsSL", "-o", installer, "https://opencode.ai/v2/install"],
+            "5 minutes",
+          )
+          if (download.code !== 0) return download
+          return yield* exec(["bash", installer, "--version", version, "--no-modify-path"], "5 minutes")
        }
-        if (method === "brew") return yield* runUpgrade({ method, command: ["brew", "upgrade", packageName] })
-        return yield* runUpgrade({ method, command: commands[method] })
+        return yield* exec(commands[method], "5 minutes")
      }),
-    ).pipe(
-      Effect.mapError((cause) =>
-        cause instanceof UpgradeError
-          ? cause
-          : new UpgradeError(
-              {
-                title: "Could not prepare the OpenCode upgrade",
-                detail: errorDetail(cause),
-                retry: "Fix the issue above, then run opencode upgrade again.",
-              },
-              { cause },
-            ),
-      ),
-      Effect.asVoid,
-    )
+    ).pipe(Effect.mapError((cause) => new Error(`Failed to update with ${method}`, { cause })))
+    if (result.code === 0) return
+    return yield* Effect.fail(new Error(result.stderr.trim() || `Failed to update with ${method}`))
  })

  const inspect = Effect.fnUntraced(function* () {
@@ -78,7 +78,7 @@ test("merges inline CLI config content over the global config", async () => {
  await Bun.write(
    file,
    JSON.stringify({
-      tabs: { mode: "on", scope: "global" },
+      tabs: { enabled: true, scope: "global" },
      keybinds: { "app.exit": "ctrl+q" },
      plugins: ["global"],
      animations: true,
@@ -105,7 +105,7 @@ test("merges inline CLI config content over the global config", async () => {
      }),
    )

-    expect(result.loaded.tabs).toEqual({ mode: "off", scope: "global" })
+    expect(result.loaded.tabs).toEqual({ enabled: false, scope: "global" })
    expect(result.loaded.keybinds).toEqual({ "app.exit": "ctrl+q", "help.show": false })
    expect(result.loaded.plugins).toEqual(["inline"])
    expect(result.updated).toMatchObject({ animations: false, mouse: false })
@@ -116,26 +116,6 @@ test("merges inline CLI config content over the global config", async () => {
  }
 })

-test("reads the legacy tabs toggle without rewriting it", async () => {
-  await using directory = await tmpdir()
-  const file = path.join(directory.path, "cli.json")
-  await Bun.write(file, JSON.stringify({ tabs: { enabled: false } }))
-
-  const config = await run(
-    directory.path,
-    Effect.gen(function* () {
-      const service = yield* Config.Service
-      expect((yield* service.get()).tabs).toEqual({ mode: "off" })
-      return yield* service.update((draft) => {
-        draft.animations = false
-      })
-    }),
-  )
-
-  expect(config.tabs).toEqual({ mode: "off" })
-  expect(await Bun.file(file).json()).toEqual({ tabs: { enabled: false }, animations: false })
-})
-
 test("migrates tui and kv config into cli.json", async () => {
  await using directory = await tmpdir()
  await Bun.write(
@@ -19,7 +19,6 @@ function fixture(
  } = () => ({}),
  name = "@opencode/cli",
  failCleanup = false,
-  releasePackage = name,
 ) {
  return Effect.gen(function* () {
    const fs = yield* FileSystem.FileSystem
@@ -35,7 +34,7 @@ function fixture(
    yield* Effect.acquireRelease(
      Effect.sync(() =>
        spyOn(globalThis, "fetch").mockImplementation(
-          Object.assign(async () => Response.json({ version: "2.3.4", metadata: { package: releasePackage } }), {
+          Object.assign(async () => Response.json({ version: "2.3.4", metadata: { package: name } }), {
            preconnect: fetch.preconnect,
          }),
        ),
@@ -107,7 +106,6 @@ const installs = [
    command: ["pnpm", "add", "--global", "--allow-build=@opencode/cli", "@opencode/cli@2.3.4-beta.1"],
  },
  { method: "yarn", command: ["yarn", "global", "add", "@opencode/cli@2.3.4-beta.1"] },
-  { method: "vp", command: ["vp", "update", "-g", "@opencode/cli@2.3.4-beta.1"] },
 ] as const

 installs.forEach(({ method, command }) => {
@@ -119,25 +117,6 @@ installs.forEach(({ method, command }) => {
    }),
  )
 })
-
-it.live("vp force-installs a renamed V2 package that replaces the existing binary owner", () =>
-  Effect.gen(function* () {
-    const test = yield* fixture(() => ({}), "@opencode/cli", false, "@opencode/cli-node")
-    yield* test.updater.upgrade("vp", "v2.3.4-beta.1")
-    expect(test.commands).toEqual([["vp", "install", "-g", "--force", "@opencode/cli-node@2.3.4-beta.1"]])
-  }),
-)
-
-it.live("vp removes the package from its managed global store", () =>
-  Effect.gen(function* () {
-    const test = yield* fixture()
-    const removal = test.updater.removal("vp")
-    if (!removal) return yield* Effect.die("Expected vp removal command")
-    expect(removal.command).toEqual(["vp", "uninstall", "-g", "@opencode/cli"])
-    yield* removal.run
-    expect(test.commands).toEqual([["vp", "uninstall", "-g", "@opencode/cli"]])
-  }),
-)
 ;[0, 1].forEach((exitCode) => {
  it.live(`bun isolates and removes its install cache after exit ${exitCode}`, () =>
    Effect.gen(function* () {
@@ -221,19 +200,11 @@ it.live("install failures expose stderr and process errors do not report success
    expect(missing.commands).toHaveLength(1)
  }),
 )
-;(["npm", "pnpm", "bun", "yarn", "vp", undefined] as const).forEach((method) => {
+;(["npm", "pnpm", "bun", "yarn", undefined] as const).forEach((method) => {
  it.live(`method detection identifies ${method ?? "an unknown installation"} using the V2 package`, () =>
    Effect.gen(function* () {
      const test = yield* fixture((command) => ({
-        stdout: Buffer.from(
-          command.command === method
-            ? method === "vp"
-              ? JSON.stringify([{ name: "@opencode/cli", version: "2.3.4" }])
-              : "@opencode/cli@2.3.4"
-            : command.command === "vp"
-              ? "[]"
-              : "opencode-ai@1.0.0",
-        ),
+        stdout: Buffer.from(command.command === method ? "@opencode/cli@2.3.4" : "opencode-ai@1.0.0"),
      }))
      expect(yield* test.updater.method()).toBe(method)
      expect(test.commands).toEqual([
@@ -241,7 +212,6 @@ it.live("install failures expose stderr and process errors do not report success
        ["pnpm", "list", "-g", "--depth=0", "@opencode/cli"],
        ["bun", "pm", "ls", "-g"],
        ["yarn", "global", "list"],
-        ["vp", "list", "-g", "--json", "@opencode/cli"],
      ])
    }),
  )
@@ -255,16 +225,7 @@ it.live("method detection tolerates unavailable package managers", () =>
        : { error: new AppProcess.AppProcessError({ command: command.command }) },
    )
    expect(yield* test.updater.method()).toBe("yarn")
-    expect(test.commands).toHaveLength(5)
-  }),
-)
-
-it.live("vp detection ignores no-match output that repeats the package name", () =>
-  Effect.gen(function* () {
-    const test = yield* fixture((command) => ({
-      stdout: Buffer.from(command.command === "vp" ? "No global packages matching '@opencode/cli'." : ""),
-    }))
-    expect(yield* test.updater.method()).toBeUndefined()
+    expect(test.commands).toHaveLength(4)
  }),
 )

@@ -304,16 +265,13 @@ if (typeof OPENCODE_CLI_NAME === "string" && OPENCODE_CLI_NAME === "opencode2-no
      expect(yield* test.updater.method()).toBe("npm")
      yield* test.updater.upgrade("npm", "v2.3.4")
      yield* test.updater.upgrade("pnpm", "v2.3.4")
-      yield* test.updater.upgrade("vp", "v2.3.4")
      expect(test.commands).toEqual([
        ["npm", "list", "-g", "--depth=0", "@opencode/cli-node"],
        ["pnpm", "list", "-g", "--depth=0", "@opencode/cli-node"],
        ["bun", "pm", "ls", "-g"],
        ["yarn", "global", "list"],
-        ["vp", "list", "-g", "--json", "@opencode/cli-node"],
        ["npm", "install", "--global", "@opencode/cli-node@2.3.4"],
        ["pnpm", "add", "--global", "--allow-build=@opencode/cli-node", "@opencode/cli-node@2.3.4"],
-        ["vp", "update", "-g", "@opencode/cli-node@2.3.4"],
      ])
    }),
  )
@@ -35,12 +35,6 @@ describe("upgrade command", () => {
    expect(result.events).toEqual([{ method: "bun", version: "2.0.0" }])
  })

-  test("accepts vp as an explicit installation method", async () => {
-    const result = await cli(["2.0.0", "--method", "vp"])
-    expect(result.exitCode).toBe(0)
-    expect(result.events).toEqual([{ method: "vp", version: "2.0.0" }])
-  })
-
  test("skips the already installed version", async () => {
    const result = await cli(["v0.0.0-beta-old"])
    expect(result.exitCode).toBe(0)
@@ -56,7 +50,7 @@ describe("upgrade command", () => {
  })

  test("rejects unsupported methods before attempting an upgrade", async () => {
-    const result = await cli(["--method", "apt"])
+    const result = await cli(["--method", "brew"])
    expect(result.exitCode).not.toBe(0)
    expect(result.events).toEqual([])
  })
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/client",
-  "version": "2.0.12",
+  "version": "2.0.8",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -456,10 +456,6 @@ export type V2EventServerConnected = {
  data: {}
 }

-export type ModelSettings = { compaction?: ProviderCompaction } & { [x: string]: any }
-
-export type ConfigModelSettings = { compaction?: ProviderCompaction } & { [x: string]: JsonValue | null }
-
 export type ProviderSettings = {
  timeout?: number | false
  chunkTimeout?: number
@@ -509,12 +505,12 @@ export type PromptAgentAttachment = { name: string; mention?: PromptMention }

 export type PromptSkillAttachment = { id: string; name: string; text?: string; mention?: PromptMention }

-export type SessionMessageAssistantText = { type: "text"; text: string; native?: SessionMessageProviderState }
+export type SessionMessageAssistantText = { type: "text"; text: string; state?: SessionMessageProviderState }

 export type SessionMessageAssistantReasoning = {
  type: "reasoning"
  text: string
-  native?: SessionMessageProviderState
+  state?: SessionMessageProviderState
  time?: { created: number; completed?: number }
 }

@@ -1354,6 +1350,15 @@ export type SessionToolCalled = {
  }
 }

+export type SessionMessageAssistantText1 = { type: "text"; text: string; state?: SessionMessageProviderState1 }
+
+export type SessionMessageAssistantReasoning1 = {
+  type: "reasoning"
+  text: string
+  state?: SessionMessageProviderState1
+  time?: { created: number; completed?: number }
+}
+
 export type ToolContent1 = ToolTextContent | ToolFileContent1

 export type FormNumberField = {
@@ -1651,19 +1656,19 @@ export type SessionInboxMove = {
  payload: SessionInboxMovePayload
 }

-export type ModelVariant = {
-  id: string
-  settings?: ModelSettings
-  headers?: { [x: string]: string }
-  body?: { [x: string]: any }
-}
-
 export type ProviderRequest = {
  settings: ProviderSettings
  headers: { [x: string]: string }
  body: { [x: string]: any }
 }

+export type ModelVariant = {
+  id: string
+  settings?: ProviderSettings
+  headers?: { [x: string]: string }
+  body?: { [x: string]: any }
+}
+
 export type ProviderInfo = {
  id: string
  canonical?: string
@@ -1753,7 +1758,7 @@ export type SessionMessageCompactionCompleted = {
  status: "completed"
  reason: "auto" | "manual"
  model?: ModelRef
-  native?: SessionMessageProviderState
+  providerState?: SessionMessageProviderState
  summary: string
  recent: string
  providerContext?: SessionProviderContext
@@ -1893,7 +1898,7 @@ export type ModelInfo = {
  name: string
  compatibility?: ModelCompatibility
  package?: string
-  settings?: ModelSettings
+  settings?: ProviderSettings
  headers?: { [x: string]: string }
  body?: { [x: string]: any }
  capabilities: ModelCapabilities
@@ -2102,13 +2107,13 @@ export type ConfigEntry =
                name?: string
                compatibility?: ModelCompatibility
                package?: string
-                settings?: ConfigModelSettings
+                settings?: ConfigProviderSettings
                headers?: { [x: string]: string }
                body?: { [x: string]: JsonValue }
                capabilities?: ModelCapabilities
                variants?: Array<{
                  id: string
-                  settings?: ConfigModelSettings
+                  settings?: ConfigProviderSettings
                  headers?: { [x: string]: string }
                  body?: { [x: string]: JsonValue }
                }>
@@ -2219,7 +2224,7 @@ export type SessionMessageAssistant = {
  snapshot?: { start?: string; end?: string; files?: Array<string> }
  finish?: "stop" | "length" | "tool-calls" | "content-filter" | "error" | "unknown"
  rawFinish?: string
-  native?: SessionMessageProviderState
+  providerState?: SessionMessageProviderState
  cost?: MoneyUSD
  tokens?: TokenUsageInfo
  error?: SessionStructuredError
@@ -2227,13 +2232,8 @@ export type SessionMessageAssistant = {
 }

 export type SessionMessageAssistantContentEncoded =
-  | { type: "text"; text: string; state?: SessionMessageProviderState1 }
-  | {
-      type: "reasoning"
-      text: string
-      time?: { created: number; completed?: number }
-      state?: SessionMessageProviderState1
-    }
+  | SessionMessageAssistantText1
+  | SessionMessageAssistantReasoning1
  | SessionMessageAssistantTool1

 export type FormInfo = { id: string; sessionID: string; title: string; metadata?: FormMetadata; fields: FormFields }
@@ -3098,11 +3098,11 @@ export type SessionImportInput = {
          readonly agent: string
          readonly model: { readonly id: string; readonly providerID: string; readonly variant?: string }
          readonly content: ReadonlyArray<
-            | { readonly type: "text"; readonly text: string; readonly native?: { readonly [x: string]: JsonValue } }
+            | { readonly type: "text"; readonly text: string; readonly state?: { readonly [x: string]: JsonValue } }
            | {
                readonly type: "reasoning"
                readonly text: string
-                readonly native?: { readonly [x: string]: JsonValue }
+                readonly state?: { readonly [x: string]: JsonValue }
                readonly time?: { readonly created: number; readonly completed?: number }
              }
            | {
@@ -3176,7 +3176,7 @@ export type SessionImportInput = {
          readonly snapshot?: { readonly start?: string; readonly end?: string; readonly files?: ReadonlyArray<string> }
          readonly finish?: "stop" | "length" | "tool-calls" | "content-filter" | "error" | "unknown"
          readonly rawFinish?: string
-          readonly native?: { readonly [x: string]: JsonValue }
+          readonly providerState?: { readonly [x: string]: JsonValue }
          readonly cost?: number
          readonly tokens?: {
            readonly input: number
@@ -3210,7 +3210,7 @@ export type SessionImportInput = {
              readonly status: "completed"
              readonly reason: "auto" | "manual"
              readonly model?: { readonly id: string; readonly providerID: string; readonly variant?: string }
-              readonly native?: { readonly [x: string]: JsonValue }
+              readonly providerState?: { readonly [x: string]: JsonValue }
              readonly summary: string
              readonly recent: string
              readonly providerContext?: {
@@ -3415,11 +3415,11 @@ export type SessionImportInput = {
          readonly agent: string
          readonly model: { readonly id: string; readonly providerID: string; readonly variant?: string }
          readonly content: ReadonlyArray<
-            | { readonly type: "text"; readonly text: string; readonly native?: { readonly [x: string]: JsonValue } }
+            | { readonly type: "text"; readonly text: string; readonly state?: { readonly [x: string]: JsonValue } }
            | {
                readonly type: "reasoning"
                readonly text: string
-                readonly native?: { readonly [x: string]: JsonValue }
+                readonly state?: { readonly [x: string]: JsonValue }
                readonly time?: { readonly created: number; readonly completed?: number }
              }
            | {
@@ -3493,7 +3493,7 @@ export type SessionImportInput = {
          readonly snapshot?: { readonly start?: string; readonly end?: string; readonly files?: ReadonlyArray<string> }
          readonly finish?: "stop" | "length" | "tool-calls" | "content-filter" | "error" | "unknown"
          readonly rawFinish?: string
-          readonly native?: { readonly [x: string]: JsonValue }
+          readonly providerState?: { readonly [x: string]: JsonValue }
          readonly cost?: number
          readonly tokens?: {
            readonly input: number
@@ -3527,7 +3527,7 @@ export type SessionImportInput = {
              readonly status: "completed"
              readonly reason: "auto" | "manual"
              readonly model?: { readonly id: string; readonly providerID: string; readonly variant?: string }
-              readonly native?: { readonly [x: string]: JsonValue }
+              readonly providerState?: { readonly [x: string]: JsonValue }
              readonly summary: string
              readonly recent: string
              readonly providerContext?: {
@@ -3732,11 +3732,11 @@ export type SessionImportInput = {
          readonly agent: string
          readonly model: { readonly id: string; readonly providerID: string; readonly variant?: string }
          readonly content: ReadonlyArray<
-            | { readonly type: "text"; readonly text: string; readonly native?: { readonly [x: string]: JsonValue } }
+            | { readonly type: "text"; readonly text: string; readonly state?: { readonly [x: string]: JsonValue } }
            | {
                readonly type: "reasoning"
                readonly text: string
-                readonly native?: { readonly [x: string]: JsonValue }
+                readonly state?: { readonly [x: string]: JsonValue }
                readonly time?: { readonly created: number; readonly completed?: number }
              }
            | {
@@ -3810,7 +3810,7 @@ export type SessionImportInput = {
          readonly snapshot?: { readonly start?: string; readonly end?: string; readonly files?: ReadonlyArray<string> }
          readonly finish?: "stop" | "length" | "tool-calls" | "content-filter" | "error" | "unknown"
          readonly rawFinish?: string
-          readonly native?: { readonly [x: string]: JsonValue }
+          readonly providerState?: { readonly [x: string]: JsonValue }
          readonly cost?: number
          readonly tokens?: {
            readonly input: number
@@ -3844,7 +3844,7 @@ export type SessionImportInput = {
              readonly status: "completed"
              readonly reason: "auto" | "manual"
              readonly model?: { readonly id: string; readonly providerID: string; readonly variant?: string }
-              readonly native?: { readonly [x: string]: JsonValue }
+              readonly providerState?: { readonly [x: string]: JsonValue }
              readonly summary: string
              readonly recent: string
              readonly providerContext?: {
@@ -846,7 +846,7 @@ export function createData(config: CreateDataInput) {
            existing.error = undefined
            existing.finish = undefined
            existing.rawFinish = undefined
-            existing.native = undefined
+            existing.providerState = undefined
            existing.time.created = event.data.started
            existing.time.streamed = undefined
            existing.time.completed = undefined
@@ -880,7 +880,7 @@ export function createData(config: CreateDataInput) {
          assistant.time.completed = event.created
          assistant.finish = event.data.finish
          assistant.rawFinish = event.data.rawFinish
-          assistant.native = event.data.providerState
+          assistant.providerState = event.data.providerState
          assistant.cost = event.data.cost
          assistant.tokens = event.data.tokens
          if (event.data.snapshot) assistant.snapshot = { ...assistant.snapshot, end: event.data.snapshot }
@@ -892,7 +892,7 @@ export function createData(config: CreateDataInput) {
          assistant.time.completed = event.created
          assistant.finish = event.data.finish ?? "error"
          assistant.rawFinish = event.data.rawFinish
-          assistant.native = event.data.providerState
+          assistant.providerState = event.data.providerState
          assistant.error = event.data.error
          assistant.retry = undefined
          if (event.data.cost !== undefined && event.data.tokens !== undefined) {
@@ -914,7 +914,6 @@ export function createData(config: CreateDataInput) {
      case "session.text.ended":
        message.editText(event.data.sessionID, event.data.assistantMessageID, (text) => {
          text.text = event.data.text
-          text.native = event.data.state
        })
        return
      case "session.tool.input.started":
@@ -985,7 +984,7 @@ export function createData(config: CreateDataInput) {
          assistant.content.push({
            type: "reasoning",
            text: "",
-            native: event.data.state,
+            state: event.data.state,
            time: { created: event.created },
          })
        })
@@ -999,7 +998,7 @@ export function createData(config: CreateDataInput) {
        message.editReasoning(event.data.sessionID, event.data.assistantMessageID, (reasoning) => {
          reasoning.text = event.data.text
          reasoning.time = { created: reasoning.time?.created ?? event.created, completed: event.created }
-          if (event.data.state !== undefined) reasoning.native = event.data.state
+          if (event.data.state !== undefined) reasoning.state = event.data.state
        })
        return
      case "session.retry.scheduled":
@@ -1106,7 +1105,7 @@ export function createData(config: CreateDataInput) {
              status: "completed",
              reason: event.data.reason,
              model: event.data.model,
-              native: event.data.providerState,
+              providerState: event.data.providerState,
              providerContext: event.data.providerContext,
              summary: event.data.text,
              recent: event.data.recent,
@@ -1121,7 +1120,7 @@ export function createData(config: CreateDataInput) {
            status: "completed",
            reason: event.data.reason,
            model: event.data.model,
-            native: event.data.providerState,
+            providerState: event.data.providerState,
            providerContext: event.data.providerContext,
            summary: event.data.text,
            recent: event.data.recent,
@@ -135,7 +135,7 @@ test.each(["started", "cancelled", "failed"])(
          status: "completed",
          summary: "Summary",
          model,
-          native: providerState,
+          providerState,
          providerContext,
          cost: 0.01,
          tokens,
@@ -6,8 +6,6 @@
 - Tool schemas are the model-facing Interface. Keep arguments minimal and natural to the operation; never add unrelated IDs as ambient capability tokens.
 - State model-visible diagnostics, logs, tool descriptions, and instructions directly. The execution context is already clear; do not repeat `Code Mode` or `CodeMode` unless the distinction is necessary.
 - When interpreter behavior or support changes, update `interpreter-support.md` and direct tests in the same PR.
- Program values are `Value` (`src/interpreter/objects.ts`); host values are `unknown` and are copied in at the boundaries (`fromHost`, `fromJson`). Do not widen program-facing signatures back to `unknown`.
- A built-in kind of object is one `Obj` subclass (`Wrapper` for host-backed data such as Date or Map, `Opaque` for machinery such as functions and promises) that overrides `tag`, `toString`, `toPrimitive`, `inspect`, `toHost`, and `iterator` as needed. Do not add `instanceof` ladders over the built-in classes elsewhere; ask the object.

 ## OpenAPI

@@ -13,8 +13,8 @@ The idea of code mode was originally introduced by Cloudflare. See

 ## How it differs from JavaScript

- **Only supported APIs are available.** Programs can use the provided tools, supported JavaScript built-ins, and the
-  globals the host adds through extensions. Timers, `process`, filesystem access, imports, and modules are unavailable.
+- **Only supported APIs are available.** Programs can use the provided tools and supported JavaScript built-ins. APIs
+  such as `fetch`, timers, `process`, filesystem access, imports, and modules are unavailable.
 - **Unfinished work is interrupted.** Tool calls and async functions start when called. When the program finishes,
  anything still running is interrupted. Unhandled rejections from un-awaited promises are returned as warnings.
 - **REPL-style results.** Without an explicit `return`, the final top-level expression becomes the result. `undefined`
@@ -94,19 +94,11 @@ receive `{ extension, name, args }`. An `after` hook also receives how the call
 `failure` with its error, or `interrupted`). A failing `before` hook denies the call, and the program catches the
 failure as a thrown error.

-### `Extension.make`
+### `Values`

-Extensions are host functions a program calls directly as globals, such as `fetch`. Unlike tools they are not in the
-catalog, not counted against `maxToolCalls`, and not described to the model; the host decides what they mean.
-
-```ts
-const web = Extension.make({ name: "web", globals: { fetch: (url: string) => globalThis.fetch(url) } })
-const runtime = CodeMode.make({ tools, extensions: [web] })
-```
-
-Every value crossing in either direction is converted, never shared: arguments come in as copies, results go out as
-copies, and a function inside a result is callable the same way. A global that shadows a built-in or another
-extension throws at `CodeMode.make`.
+`Values` exports the runtime's non-JSON value classes: `Values.URL`, `Values.URLSearchParams`, `Values.Date`,
+`Values.RegExp`, `Values.Map`, `Values.Set`, and `Values.Promise`. The interpreter recognizes these by class; a
+program's `new URL(...)` is a `Values.URL` wrapping the host `URL`. `Values.isValue` narrows to the data-like kinds.

 ### OpenAPI tools

@@ -15,7 +15,8 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 ## Source and execution model

 - [x] JavaScript parsed with the latest syntax accepted by Acorn, then restricted by the interpreter allowlist.
-      TypeScript-only syntax is rejected rather than stripped before execution.
+- [x] Erasable TypeScript syntax, including type annotations, type declarations, assertions, and non-null assertions.
+      TypeScript is transpiled first; the emitted JavaScript must still use the supported subset.
 - [x] Top-level `await` and `return` through the program's implicit async-function scope.
 - [x] Explicit `return`, final top-level expression as a REPL-style result, and `null` when no value is produced.
 - [x] The host boundary is `JSON.stringify` plus a short table. The program result and tool arguments cross as
@@ -24,11 +25,11 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
      and Map, RegExp, and generators serialize as `{}`. A bare `undefined` result is `null`.
      Tool results come back the way `JSON.parse(JSON.stringify(result))` would. The table, where a value cannot
      be JSON but what the program meant is clear: a promise is awaited (a rejection fails the program), a Set
-      crosses as an array, a URLSearchParams as its query string, an Error as `{ name, message, ...own enumerable }`, a
+      crosses as an array, a URLSearchParams as its query string, an Error as `{ name, message, ...own }`, a
      Uint8Array is rejected with a hint to encode as text, and own `__proto__` keys are dropped so merging tool
      inputs or results cannot replace a prototype. In-program `JSON.stringify` keeps JS behavior except for the
      Error form and a promise, which is a `TypeError` with an await hint rather than a silent `{}`.
- [x] Live Date, RegExp, Map, Set, URL, URLSearchParams, Headers, and Uint8Array values inside CodeMode.
+- [x] Live Date, RegExp, Map, Set, URL, URLSearchParams, and Uint8Array values inside CodeMode.
 - [x] Tool calls through the host-provided `tools` tree only.
 - [x] The global `search(...)` built-in: synchronous tool discovery that counts as an admitted tool call and is
      shadowable by program declarations like other globals.
@@ -38,17 +39,16 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
      10,000,000 elements (`Array(n)`, `length =`, `Array.from`, `split`, `matchAll`, `concat`, `flat`; below the JS
      maximum of 2^32 - 1), and 10,000 pending promises at once. Exceeding one throws a `RangeError`. A single regular
      expression match can still run long on a pathological pattern; the host regex engine has no interrupt hook.
- [x] A trailing comma after a rest parameter is a syntax error, with or without `"use strict"`.
- [x] A program that begins with `"use strict"` rejects `yield` as an identifier and duplicate parameter names at
-      parse time. Without it, `yield` is an ordinary binding.
- [ ] Duplicate parameter names in non-strict code throw when the function is called, instead of binding the last
-      parameter as JavaScript does.
+- [ ] Strict-mode early errors: duplicate parameter names, `yield` as an identifier, and a trailing comma after a
+      rest parameter are accepted unless the program itself begins with `"use strict"`.
+- [ ] Valid JavaScript rejected by TypeScript transpilation before interpretation, such as `in` inside a destructuring
+      default in a `for...of` head and Unicode-escaped keywords.

 ## Values and literals

 - [x] `null`, `undefined`, booleans, finite and non-finite numbers, and strings.
- [x] Array literals, including holes and spread from arrays, strings, Maps, Sets, URLSearchParams, Headers, custom
-      synchronous iterators, and synchronous generators.
+- [x] Array literals, including holes and spread from arrays, strings, Maps, Sets, URLSearchParams, custom synchronous
+      iterators, and synchronous generators.
 - [x] Object literals with shorthand, computed string/number keys, and spread following ToObject: data objects and
      arrays copy own enumerable keys, strings copy index keys, and other values contribute nothing.
 - [x] Template literals with interpolation.
@@ -56,7 +56,7 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 - [x] `NaN` and `Infinity` globals.
 - [ ] BigInt literals and in-interpreter BigInt arithmetic; BigInt remains invalid at JSON-like host boundaries.
 - [ ] Arbitrary Symbol primitive values and symbol-keyed properties. The confined `Symbol.iterator` and
-      `Symbol.asyncIterator` keys are available only for the iterator protocols.
+      `Symbol.asyncIterator` keys are available only for custom iterator protocols.
 - [ ] Tagged-template calls.
 - [ ] Getter and setter definitions in object literals.

@@ -87,6 +87,7 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 - [x] Destructuring reads through the prototype chain like member access: `const { constructor } = error` and
      `const { slice } = values` find the inherited built-in.
 - [ ] Member expressions as `for...in` targets (`for (x.y in obj)`).
+- [ ] `IteratorClose` during destructuring should throw a `TypeError` when `return()` yields a non-object.

 ## Statements and control flow

@@ -94,10 +95,9 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 - [x] `if`/`else` and conditional expressions.
 - [x] `switch`, including default clauses and fallthrough.
 - [x] `for`, `while`, and `do...while`.
- [x] `for...of` over arrays, strings, Maps, Sets, URLSearchParams, Headers, Uint8Arrays, built-in iterators, custom
-      synchronous iterators, and confined synchronous generators. Abrupt completion invokes the iterator's optional `return()`.
- [x] `for...in` over own keys of plain objects, arrays, strings, and tool references. `null`, `undefined`, and other
-      non-objects iterate nothing. An un-awaited promise throws rather than iterating.
+- [x] `for...of` over arrays, strings, Maps, Sets, URLSearchParams, custom synchronous iterators, and confined
+      synchronous generators. Abrupt completion invokes the iterator's optional `return()`.
+- [x] `for...in` over own keys of plain objects, arrays, strings, and tool references; other values iterate nothing.
 - [x] Unlabeled `break` and `continue`.
 - [x] `try`, `catch`, optional catch bindings, and `finally`.
 - [x] `throw` with arbitrary values.
@@ -111,8 +111,7 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 ## Functions and callbacks

 - [x] Function declarations, function expressions, and arrow functions.
- [x] Synchronous and `async` functions. A line break between `function` and the name is allowed, as in JavaScript;
-      a line break between `async` and `function` is not an async function.
+- [x] Synchronous and `async` functions.
 - [x] Closures, recursion, default parameters, rest parameters, and destructured parameters.
 - [x] A call depth limit of 10000: deeper nesting throws a catchable `RangeError: Maximum call stack size exceeded`
      at the overflowing call instead of running until the timeout. Callbacks invoked by built-ins count below the
@@ -124,11 +123,11 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 - [x] `Boolean`, `Number`, `String`, `parseInt`, `parseFloat`, `isFinite`, `isNaN`, and URI helpers as callbacks.
 - [x] Built-in method references as callbacks, such as `values.map(Math.abs)`, `records.map(JSON.stringify)`,
      `items.forEach(console.log)`, and `Promise.resolve(-1).then(Math.abs)`. Extra callback arguments a built-in
-      does not consume are ignored, like JS, and consumed arguments coerce, like JS (`"3.7".replace(/\d\.\d/,
-    Math.floor)` is `"3"`). A detached method loses its receiver, as in JS: `values.filter("abc".includes)` is a `TypeError`
+      does not consume are ignored, like JS; consumed arguments stay strictly validated (`Math.floor` still rejects a
+      string). A detached method loses its receiver, as in JS: `values.filter("abc".includes)` is a `TypeError`
      because `includes` is called without a string `this`.
 - [x] Constructors work as callbacks with JS call semantics: `Error` types construct (`messages.map(Error)`),
-      and new-requiring constructors (`Map`, `Set`, `URL`, `URLSearchParams`, `Headers`, `Promise`) throw a `TypeError`,
+      and new-requiring constructors (`Map`, `Set`, `URL`, `URLSearchParams`, `Promise`) throw a `TypeError`,
      like JS.
 - [x] Tool references and detached `Promise` statics are rejected as callbacks with a hint to wrap them in an
      arrow function.
@@ -145,13 +144,11 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
      assignments, object literal keys, and destructuring or parameter defaults.
 - [x] Built-in functions are objects too, with `name` and `length` (`Math.max.length === 2`,
      `Array.prototype.push.name === "push"`).
- [x] A named function expression's name is bound read-only inside its own body; assigning to it throws a
-      `TypeError`, as in strict mode.
- [x] Redeclaring a function in the same scope, or alongside a `var`, is allowed: the last declaration wins.
- [x] Generator functions have their own `prototype` (inheriting the shared generator prototype), so
-      `g() instanceof g` holds. Plain functions have none, since they cannot construct.
- [x] Generator and async generator functions bind parameters (defaults, destructuring) at the call and defer only the
-      body to the first `next()`, so a bad argument throws synchronously from the call site, as in JS.
+- [ ] A named function expression's name is not bound inside its own body.
+- [ ] Redeclaring a function in the same scope is rejected; in JavaScript the last declaration wins.
+- [ ] A line terminator between `async function` and the function name.
+- [ ] Generator and async generator functions evaluate parameter defaults and destructuring at the first `next()`
+      rather than at the call, so their errors are not thrown synchronously.
 - [x] Synchronous and async generator declarations/expressions, `yield`, and `yield*`, including lazy bodies,
      `next(value)`, `return(value)`, `throw(value)`, exhaustion, promise adoption, async request ordering,
      `try`/`catch`/`finally`, and sync/async iterator symbols. Async `yield*` awaits values while adapting a sync
@@ -164,8 +161,7 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
      rejected by every synchronous consumer.
 - [x] Synchronous iterator acquisition and result validation follow `IteratorClose` boundaries: consumer errors and
      intentional early stops invoke `return()`, acquisition/`next()` failures do not, and an original consumer error
-      wins over a cleanup failure. A generator's `return()` is an intentional stop, so a `return()` that throws or
-      yields a non-object surfaces from it as a `TypeError`. Async iterator consumption remains limited to `for await...of` and async `yield*`.
+      wins over a cleanup failure. Async iterator consumption remains limited to `for await...of` and async `yield*`.
 - [x] Portable generator protocol coverage is adapted from pinned Test262 cases for suspended-start, suspended-yield,
      and completed states; sync and async `next`/`return`/`throw`; finally yields and completion overrides; rejected
      yielded promises; mixed async request queues; sync and async `yield*` forwarding; malformed methods/results;
@@ -183,12 +179,11 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 - [x] Sequence expressions (the comma operator).
 - [x] `await` for CodeMode promises and callable thenables; a plain value passes through unchanged, though every
      `await` still defers its continuation one reaction turn.
- [x] `new` for Array, Object, Error types, Date, RegExp, Map, Set, URL, URLSearchParams, Headers, and Promise. `new`
-      on any other value throws a catchable `TypeError` naming the callee: other built-in functions such as `Number`
-      say `new` is unsupported and point at the plain call, user-defined functions report the constructor gap below,
-      and non-callable values are not constructors. Error constructors take the ES2022 options object, so
-      `new Error(message, { cause })` installs a non-enumerable `cause` when the option is present. `Error.isError`
-      is true for every Error value.
+- [x] `new` for Array, Object, Error types, Date, RegExp, Map, Set, URL, URLSearchParams, and Promise. `new` on any
+      other value throws a catchable `TypeError` naming the callee: other built-in functions such as `Number` say
+      `new` is unsupported and point at the plain call, user-defined functions report the constructor gap below, and
+      non-callable values are not constructors. Error constructors take the ES2022 options object, so
+      `new Error(message, { cause })` installs a non-enumerable `cause` when the option is present.
 - [x] Arithmetic operators: `+`, `-`, `*`, `/`, `%`, and `**`.
 - [x] Equality and ordering: `==`, `!=`, `===`, `!==`, `<`, `<=`, `>`, and `>=`.
 - [x] Bitwise operators: `&`, `|`, `^`, `~`, `<<`, `>>`, and `>>>`.
@@ -199,14 +194,13 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 - [x] Plain, arithmetic, bitwise, and logical assignment operators.
 - [x] Property deletion on plain data objects and arrays, including computed and optional forms; deleting an array index
      creates a hole without changing its length. Deleting a non-configurable property (`length`) or
-      assigning a read-only one (`Math.PI`, `fn.name`) throws a `TypeError`, as in strict mode. `delete` of a
-      non-reference (`delete 0`, `delete f()`) evaluates the operand and is `true`; `delete x` on a variable throws.
+      assigning a read-only one (`Math.PI`, `fn.name`) throws a `TypeError`, as in strict mode.
 - [ ] Operators, `switch` discriminants, template interpolation, and coercion helpers such as `String` and `isNaN`
      applied to functions and namespaces; JavaScript coerces them, the interpreter rejects non-data operands.
 - [ ] ToPrimitive on object operands: operators, `Error(message)`, `Date` arguments, and `parseInt` radix should call
      `valueOf`/`toString` in spec order and surface their throws.
- [x] Property keys follow ToPropertyKey: `x[null]`, `x[true]`, and objects (via their built-in string form) become
-      string keys.
+- [ ] Property keys follow ToPropertyKey: `x[null]`, `x[true]`, and objects (via `toString`) become string keys; only
+      strings and numbers are accepted.

 ## Promises and tools

@@ -242,10 +236,6 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
      resolving with the promise itself rejects with a `TypeError`. Resolver callables work anywhere callbacks are
      accepted, including `.then`/`.catch` handlers and collection callbacks, and vanish at the data boundary like
      any function.
- [x] `Promise.withResolvers()`: the same promise and resolver callables as the constructor, as a `{ promise, resolve,
-reject }` object.
- [x] `Promise.try(fn, ...args)`: calls `fn` synchronously; a throw rejects, a return fulfils, and a returned promise or
-      thenable is adopted.
 - [x] Recursive assimilation of objects with an own callable `then` field across `Promise.resolve`, combinators,
      constructors, reactions, `finally`, `await`, and async returns. Thenable methods run deferred, receive
      first-call-wins resolve/reject functions, and ignore throws after settlement. Inherited/accessor `then` fields
@@ -266,9 +256,7 @@ reject }` object.
      not construct.
 - [x] `Object()` and `new Object()` return `{}` for nullish arguments and pass objects through unchanged;
      primitive wrapper objects (`Object(1)`) are rejected explicitly.
- [x] Computed property names and object spread. Any value works as a key (ToPropertyKey): strings, numbers, and the
-      two confined symbols as themselves, everything else as its string form (`o[null]` is `o["null"]`, `o[{}]` is
-      `o["[object Object]"]`), in reads, writes, literals, `in`, and destructuring.
+- [x] Computed property names and object spread.
 - [x] `Object.keys`, `Object.values`, `Object.entries`, `Object.hasOwn`, `Object.assign`, and `Object.fromEntries`, with
      synchronous iterator support for `fromEntries`. Sources follow ToObject: strings enumerate by index, other
      primitives and wrappers contribute nothing, and `null`/`undefined` throw. `Object.assign` accepts array
@@ -285,9 +273,8 @@ reject }` object.
 - [x] `Object.is` for supported data values.
 - [x] `Object.groupBy` over finite collections and custom synchronous iterators/generators, with string-key coercion
      and plain-object results.
- [x] `Object.prototype` methods on values: `toString` (`"[object Array]"`, `"[object Map]"`, `"[object Promise]"`, and so
-      on for every built-in kind, as JS reports through `Symbol.toStringTag`), `toLocaleString` (calls the value's
-      `toString`, as in JS), `valueOf`, `hasOwnProperty`, `isPrototypeOf`, and `propertyIsEnumerable`.
+- [x] `Object.prototype` methods on values: `toString` (`"[object Array]"`), `toLocaleString`, `valueOf`,
+      `hasOwnProperty`, `isPrototypeOf`, and `propertyIsEnumerable`.

 ## Arrays

@@ -301,14 +288,9 @@ reject }` object.
      `lastIndexOf`.
 - [x] Aggregation: `reduce` and `reduceRight`.
 - [x] Ordering: `sort`, `toSorted`, `reverse`, and `toReversed`.
- [x] Access/copying: `at`, `slice`, `concat`, `flat`, `with`, `join`, and `toLocaleString` (each element's
-      `toLocaleString`, holes and nullish elements as empty strings).
+- [x] Access/copying: `at`, `slice`, `concat`, `flat`, `with`, and `join`.
 - [x] Mutation: `push`, `pop`, `shift`, `unshift`, `splice`, `fill`, and `copyWithin`.
- [x] `keys`, `values`, `entries`, and `[Symbol.iterator]` (the same function as `values`) return live iterator objects
-      with `next()` and `[Symbol.iterator]`, as in JS. Iterator objects are opaque references: they print as
-      `[opaque reference]`, serialize to `{}`, and cannot be passed to extensions. Every built-in collection iterator
-      shares one prototype. JavaScript gives each collection its own; the difference is not observable here because
-      `Object.getPrototypeOf` is not exposed.
+- [x] Materialized iteration helpers: `keys`, `values`, and `entries` return arrays rather than iterators.
 - [x] `length`, numeric indexing, index assignment, spread, and `for...of`.
 - [x] The `thisArg` argument of `Array.from` is accepted and ignored, like JS arrows.
 - [x] `Array.prototype.toSpliced`.
@@ -319,17 +301,15 @@ reject }` object.
 - [x] Assigning `length` to truncate or extend an array; invalid lengths throw `RangeError`.
 - [x] Non-index own properties on arrays (`arr.foo = 1`, `arr.constructor = null`). They are excluded from the JSON
      form, like `JSON.stringify`.
- [x] Numeric arguments coerce as in JS (ToIntegerOrInfinity): `indexOf(x, "1")`, `slice("1", "3")`, `at(null)`,
-      `flat(1.9)`, `with(1.5, v)`, `Math.max("3", "2")`, `parseInt("11", "2")`, `(1.5).toFixed("2")`,
-      `String.fromCharCode("65")`, and the Uint8Array equivalents. `join(sep)` and `JSON.parse(text)` apply ToString
-      (`join(null)` is `"1null2"`, `JSON.parse(123)` is `123`). `Array.from({ length: "2" })` applies ToLength; a
-      promise source still throws with an `await` hint rather than JS's silent `[]`. A program object's own
-      `valueOf`/`toString` is not consulted yet (see ToPrimitive above).
+- [ ] Argument coercion for `indexOf`, `lastIndexOf`, `includes`, `fill`, `flat`, `copyWithin`, and the `join`
+      separator: JavaScript applies ToIntegerOrInfinity/ToString (including `valueOf`, strings, and `undefined`), the
+      interpreter requires numbers and strings; `includes()`/`indexOf()` with no argument should search for
+      `undefined`.
+- [ ] Iterator objects from `keys`, `values`, and `entries` with a live `next()`.

 ## Strings

- [x] Case/normalization: `toLowerCase`, `toUpperCase`, `normalize`, and the `toLocaleLowerCase`/`toLocaleUpperCase`
-      aliases, which ignore their locale argument and apply the default Unicode casing.
+- [x] Case/normalization: `toLowerCase`, `toUpperCase`, `normalize`.
 - [x] Trimming: `trim`, `trimStart`, and `trimEnd`, plus the Annex B `trimLeft` and `trimRight` aliases.
 - [x] Searching/tests: `includes`, `startsWith`, `endsWith`, `indexOf`, `lastIndexOf`, and `search`.
 - [x] Slicing/access: `slice`, `substring`, Annex B `substr`, `at`, `charAt`, `charCodeAt`, and `codePointAt`.
@@ -337,7 +317,7 @@ reject }` object.
 - [x] Regular-expression integration: `match`, materialized `matchAll`, `replace`, `replaceAll`, `split`, and `search`.
 - [x] `localeCompare`; locale and options arguments are currently ignored.
 - [x] `isWellFormed` and `toWellFormed`.
- [x] `toString`, `length`, numeric indexing, spread, `for...of`, and `[Symbol.iterator]` by Unicode code point.
+- [x] `toString`, `length`, numeric indexing, spread, and `for...of` by Unicode code point.
 - [x] Static `String.fromCharCode` and `String.fromCodePoint`.
 - [x] Native argument coercion for supported String methods; for example, `includes(1)` and `slice("1")` coerce like
      native JS, `split(undefined)` returns the whole string, and `includes`/`startsWith`/`endsWith` reject regular
@@ -353,8 +333,7 @@ reject }` object.
 - [x] Coercion functions: `Number`, `parseInt`, and `parseFloat`.
 - [x] Number predicates/parsers: `Number.isInteger`, `Number.isFinite`, `Number.isNaN`, `Number.isSafeInteger`,
      `Number.parseInt`, and `Number.parseFloat`.
- [x] Number formatting: `toFixed`, `toPrecision`, `toExponential`, `toString`, `valueOf`, and `toLocaleString`, which
-      always formats as `en-US` (`"1,234.5"`) so output does not depend on the host.
+- [x] Number formatting: `toFixed`, `toPrecision`, `toExponential`, `toString`, and `valueOf`.
 - [x] Number constants: `MAX_SAFE_INTEGER`, `MIN_SAFE_INTEGER`, `MAX_VALUE`, `MIN_VALUE`, `EPSILON`, `NaN`,
      `POSITIVE_INFINITY`, and `NEGATIVE_INFINITY`.
 - [x] Math constants: `PI`, `E`, `LN2`, `LN10`, `LOG2E`, `LOG10E`, `SQRT2`, and `SQRT1_2`.
@@ -367,8 +346,7 @@ reject }` object.
      use their epoch time) and reject opaque runtime references as data errors.
 - [x] Unknown static members on global namespaces and on `Number`/`String`/the coercion functions read as `undefined`
      for feature detection. Calling any undefined value reports a native-style `TypeError` naming the callee, for
-      example `Math.sum is not a function.` or `search(...).catch is not a function.` Unknown `Promise` statics keep
-      their descriptive error.
+      example `Math.sum is not a function.` Unknown `Promise` statics keep their descriptive error.
 - [x] `Math.sumPrecise` over finite collections and custom synchronous iterators/generators, rejecting non-number
      elements without coercion.
 - [x] Global coercing `isFinite` and `isNaN`; opaque runtime references reject as data errors, like `Number(...)`.
@@ -382,8 +360,7 @@ reject }` object.
 - [x] `JSON.stringify` function and array replacers. Function replacers receive `(key, value)` in preorder, including
      the root, but no `this` holder. Array replacers preserve requested property order, deduplicate names, coerce
      number primitives, and ignore non-string/non-number entries. Primitive wrapper entries remain unsupported.
- [x] Captured `console.log`, `console.info`, `console.debug`, `console.warn`, and `console.error`. An Error prints as
-      `Error.prototype.toString` would show it (`Error: boom`), wherever it appears in the logged value.
+- [x] Captured `console.log`, `console.info`, `console.debug`, `console.warn`, and `console.error`.
 - [x] Captured `console.dir` and `console.table`.

 ## Date
@@ -403,8 +380,6 @@ reject }` object.
      `TimeClip` behavior.
 - [x] `Date.prototype.toUTCString` and its `toGMTString` alias.
 - [x] `toDateString` and `toTimeString` in the host's local timezone.
- [x] `toLocaleString`, `toLocaleDateString`, and `toLocaleTimeString` always format as `en-US` in UTC
-      (`"1/1/1970, 12:00:00 AM"`) so output does not depend on the host.
 - [x] Native one-argument Date coercion for supported values, including booleans, null, arrays, and plain objects.
 - [ ] Date setters and multi-argument construction coerce object arguments through `valueOf`/`toString` and surface
      their throws.
@@ -426,30 +401,14 @@ reject }` object.
 - [x] Match `indices` metadata for the `d` flag, including named groups on `exec`, `match`, and `matchAll` results.
 - [x] `RegExp.escape`.

-## Iterator
-
- [x] `Iterator.prototype.map`, `filter`, `take`, `drop`, and `flatMap` on any iterator or generator: lazy, one source
-      step per result, closing the source when a callback throws, on early `return()`, or when `for...of` or
-      destructuring finishes with it early. Once done or closed a helper stays done, and a callback that re-enters its
-      own helper is a `TypeError`. `take`/`drop` coerce their count and reject `NaN` or negative counts with a
-      `RangeError`; `flatMap` callbacks must return an iterable or iterator, not a string.
- [x] `Iterator.prototype.reduce`, `toArray`, `forEach`, `some`, `every`, and `find`, closing the source on early exit.
- [x] `Iterator.from(value)` returns iterators and generators as they are, and wraps strings, iterables, and objects
-      with a `next` method. `Iterator` itself is abstract: calling or constructing it is a `TypeError`.
- [x] Helpers and `Iterator.from` wrappers have `return()`; collection iterators (`array.values()`) do not, as in JS,
-      so an early exit from them leaves them where they were.
- [ ] `Iterator.concat`, `Iterator.zip`, and `Iterator.zipKeyed` (stage 3 proposals).
-
 ## Map and Set

 - [x] Static `Map.groupBy` over finite collections and custom synchronous iterators/generators, preserving key identity.
 - [x] `new Map()` from synchronous iterables of entries.
- [x] Map `get`, `set`, `has`, `delete`, `clear`, `size`, `forEach`, `getOrInsert`, and `getOrInsertComputed`.
-      `forEach` is live: entries deleted during the walk are skipped and entries added are visited, as in JS.
+- [x] Map `get`, `set`, `has`, `delete`, `clear`, `size`, and `forEach`.
 - [x] `new Set()` from synchronous iterables.
 - [x] Set `add`, `has`, `delete`, `clear`, `size`, and `forEach`.
- [x] Live `keys`, `values`, `entries`, and `[Symbol.iterator]` iterators for Map and Set; a Set-like operand's `keys()`
-      may return any iterator or an array.
+- [x] Materialized `keys`, `values`, and `entries` arrays for Map and Set.
 - [x] Spread, `for...of`, `Array.from`, and `Object.fromEntries` integration.
 - [x] Map and Set values serialize to `{}` at host/JSON boundaries.
 - [x] Set composition and relation methods: `union`, `intersection`, `difference`, `symmetricDifference`, `isSubsetOf`,
@@ -465,9 +424,8 @@ reject }` object.
 - [x] Writable URL fields except `origin`.
 - [x] `new URLSearchParams()` from query strings, data objects, synchronous iterables of pairs, and URLSearchParams.
 - [x] URLSearchParams `append`, `delete`, `get`, `getAll`, `has`, `set`, `sort`, `forEach`, `keys`, `values`,
-      `entries`, `[Symbol.iterator]`, `toString`, and `size`.
- [x] URL values are their href in `JSON.stringify` and at the host boundary. URLSearchParams are `{}` in
-      `JSON.stringify` and their query string at the host boundary.
+      `entries`, `toString`, and `size`.
+- [x] URL values serialize to their href; URLSearchParams serialize to `{}`.

 ## Uint8Array

@@ -479,8 +437,7 @@ with a hint to encode as text first (`TextDecoder`, `toBase64`, `toHex`).
 - [x] Index reads and writes with JS byte semantics: values wrap modulo 256, out-of-range writes are ignored, indexes
      cannot be deleted. `length` is a prototype accessor, so `Object.keys` lists only indexes.
 - [x] `at`, `slice`, `subarray` (a view on the same bytes), `set`, `fill`, `reverse`, `indexOf`, `lastIndexOf`,
-      `includes`, `join`, `toString`, `toBase64`, `toHex`, and live `keys`, `values`, `entries`, and `[Symbol.iterator]`
-      iterators.
+      `includes`, `join`, `toString`, `toBase64`, `toHex`, and materialized `keys`, `values`, and `entries` arrays.
 - [x] Spread, destructuring, `for...of`, `yield*`, `Array.from`, and `new Set(bytes)`. `Array.isArray` is false.
 - [x] String coercion joins with commas; `JSON.stringify` gives `{"0":1,...}`; `console.log` prints
      `Uint8Array(n) [...]`.
@@ -494,13 +451,7 @@ with a hint to encode as text first (`TextDecoder`, `toBase64`, `toHex`).
 - [x] `crypto.randomUUID()` and `crypto.getRandomValues(uint8Array)`.
 - [x] `TextEncoder` and `TextDecoder` for UTF-8 only: any other label is a `RangeError`. `TextDecoder` accepts the
      `fatal` and `ignoreBOM` options; `decode` takes a Uint8Array or nothing.
- [x] `new Headers()` from records, synchronous iterables of pairs, and Headers, wrapping the host's `Headers`: names
-      fold to lowercase, values are normalized and combined, and invalid names or values throw a `TypeError`.
- [x] Headers `append`, `delete`, `get`, `getSetCookie`, `has`, `set`, `forEach`, `keys`, `values`, `entries`, and
-      `[Symbol.iterator]`; iteration is live and sorted by name, with `set-cookie` values kept apart.
- [x] Headers serialize to a `{ name: value }` object in JSON, in results, and in tool arguments.
- [ ] `Request`, `Response`, and `Blob`.
- [ ] `crypto.subtle` and `TextDecoder` streaming or non-UTF-8 encodings.
+- [ ] `crypto.subtle`, `Blob`, and `TextDecoder` streaming or non-UTF-8 encodings.

 ## Extensions

@@ -510,10 +461,9 @@ Nothing is exposed unless a host provides it; extension calls are not tool calls
 - [x] Each global is a function, callable but not constructible, run with `this` undefined. A global that shadows
      a built-in or another extension throws at `make`.
 - [x] Every value crossing in either direction is converted, never shared: plain objects and arrays are copied,
-      `Date`, `RegExp`, `URL`, `URLSearchParams`, `Headers`, `Map`, `Set`, and `Uint8Array` become fresh copies with
-      their contents converted (a host `ArrayBuffer` comes in as a `Uint8Array`; other typed arrays cannot come out),
-      errors cross as errors with their name, message, `cause`, and own enumerable data, and a `__proto__` key is
-      dropped. Functions, generators,
+      `Date`, `RegExp`, `URL`, `URLSearchParams`, `Map`, `Set`, and `Uint8Array` become fresh copies with their
+      contents converted (a host `ArrayBuffer` comes in as a `Uint8Array`; other typed arrays cannot come out),
+      errors cross as errors with their name and message, and a `__proto__` key is dropped. Functions, generators,
      un-awaited promises, and symbols cannot be passed in; a class instance, a symbol, or a BigInt cannot come out.
 - [x] A host function inside a result becomes a program function whose calls cross the same way, so a result can
      carry methods (`res.json()`) whose host closures keep the host state. Diagnostics name it by its path
@@ -538,21 +488,19 @@ Nothing is exposed unless a host provides it; extension calls are not tool calls
 - [x] `AggregateError` with the `(errors, message?)` signature and an own `errors` array, constructed directly or by
      an all-rejected `Promise.any`; direct construction accepts custom synchronous iterators and generators.
 - [x] Error `name`/`message`, error inheritance through `instanceof`, and plain-data serialization. `message` is an own
-      non-enumerable property and `name` is inherited, as in JS, so `Object.keys(err)` is `[]` for a plain error. The
-      result boundary still emits `{ name, message, ...own enumerable }`, so a field such as `code` crosses. `cause` is
-      non-enumerable: an extension Error carries it, and this JSON form does not. Errors have no `stack`; the diagnostic
-      carries a 1-based line and column in the submitted source instead.
+      non-enumerable property and `name` is inherited, as in JS, so `Object.keys(err)` is `[]` while the host still
+      receives `{ name, message }`. Errors have no `stack`; the diagnostic carries the source location instead.
 - [x] `instanceof` against any constructor with a `prototype`, including every built-in and `Function`.
 - [x] Catchable user throws, runtime failures raised during interpreted evaluation, awaited tool failures, and awaited
      tool-call-limit failures; parse/compile failures, cooperative timeout, and output bounding remain outside program
      `catch`.
- [x] Source locations on unsupported-syntax diagnostics. The diagnostic names the rejected node type and attaches a
-      short orientation to the supported subset; this matrix is the full reference.
+- [x] Source locations on unsupported-syntax diagnostics for JavaScript-shaped input; TypeScript transpilation may
+      shift them. The diagnostic names the rejected node type and attaches a short orientation to the supported
+      subset; this matrix is the full reference.
 - [x] Model-visible host failure messages and underlying causes, including output-validation errors.
 - [x] Caught errors do not distinguish user throws, interpreter failures, and tool failures; a program sees one
-      Error-shaped value in `catch`, rejection handlers, and `Promise.allSettled` reasons. It always has `name` and
-      `message`, plus `cause` and own data when the failure carried them. This is deliberate: the program should
-      handle a failure the same way regardless of where it originated.
+      Error-shaped value with `name` and `message` in `catch`, rejection handlers, and `Promise.allSettled` reasons.
+      This is deliberate: the program should handle a failure the same way regardless of where it originated.
 - [x] Failures raised by the interpreter are `TypeError`s unless JavaScript names them otherwise (`RangeError`,
      `ReferenceError`, `SyntaxError`, `URIError`), so `e instanceof TypeError` and `e.constructor === TypeError`
      hold. Unsupported syntax reached at runtime is a `SyntaxError`; awaited tool failures stay plain `Error`.
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/codemode",
-  "version": "2.0.12",
+  "version": "2.0.8",
  "description": "Effect-native confined code execution over schema-described tools",
  "type": "module",
  "license": "MIT",
@@ -19,6 +19,12 @@
  "exports": {
    ".": "./src/index.ts"
  },
+  "imports": {
+    "#transpile": {
+      "workerd": "./src/interpreter/transpile.workerd.ts",
+      "default": "./src/interpreter/transpile.node.ts"
+    }
+  },
  "scripts": {
    "build": "bun run script/build.ts",
    "typecheck": "tsgo --noEmit",
@@ -26,7 +32,8 @@
  },
  "dependencies": {
    "acorn": "8.15.0",
-    "effect": "catalog:"
+    "effect": "catalog:",
+    "typescript": "catalog:"
  },
  "devDependencies": {
    "@tsconfig/bun": "catalog:",
@@ -15,7 +15,7 @@ const pkg = JSON.parse(originalText) as {
  name: string
  version: string
  exports: Record<string, string | { import: string; types: string }>
-  imports?: Record<string, Record<string, string>>
+  imports: Record<string, Record<string, string>>
 }
 const tarball = `${pkg.name.replace("@", "").replace("/", "-")}-${pkg.version}.tgz`
 const output = (value: string, types = false) =>
@@ -41,14 +41,12 @@ try {
      ]
    }),
  )
-  if (pkg.imports) {
-    pkg.imports = Object.fromEntries(
-      Object.entries(pkg.imports).map(([key, conditions]) => [
-        key,
-        Object.fromEntries(Object.entries(conditions).map(([condition, value]) => [condition, output(value)])),
-      ]),
-    )
-  }
+  pkg.imports = Object.fromEntries(
+    Object.entries(pkg.imports).map(([key, conditions]) => [
+      key,
+      Object.fromEntries(Object.entries(conditions).map(([condition, value]) => [condition, output(value)])),
+    ]),
+  )
  await Bun.write("package.json", JSON.stringify(pkg, null, 2) + "\n")
  await rm(tarball, { force: true })
  await $`bun pm pack`
@@ -15,23 +15,21 @@ import {
  Obj,
  PromiseObj,
  record,
-  type Value,
  SetObj,
  URLSearchParamsObj,
-  HeadersObj,
 } from "./interpreter/objects.js"
 import { typeofValue } from "./interpreter/references.js"

 export type Json = Schema.Json

-type Replacer<R> = (args: Array<Value>) => Effect.Effect<Value, unknown, R>
+type Replacer<R> = (args: Array<unknown>) => Effect.Effect<unknown, unknown, R>

 /**
 * What `JSON.stringify` would serialize for a program value, as host JSON: `toJSON` is honored, functions and
 * `undefined` vanish, non-finite numbers become null, and everything else is copied. Two departures from JS
 * so a mistake is not a silent `{}`: an Error serializes as `{ name, message, ...own }`, and a promise throws.
 */
-export const toJson = <R>(ctx: Interpreter<R>, value: Value, replacer?: Replacer<R>) =>
+export const toJson = <R>(ctx: Interpreter<R>, value: unknown, replacer?: Replacer<R>) =>
  walk(ctx, value, replacer, false)

 /**
@@ -39,11 +37,11 @@ export const toJson = <R>(ctx: Interpreter<R>, value: Value, replacer?: Replacer
 * awaited, a Set crosses as an array, a URLSearchParams as its query string, a Uint8Array asks to be encoded as
 * text first, and a `__proto__` key is dropped so host code can never receive one.
 */
-export const toBoundary = <R>(ctx: Interpreter<R>, value: Value) => walk(ctx, value, undefined, true)
+export const toBoundary = <R>(ctx: Interpreter<R>, value: unknown) => walk(ctx, value, undefined, true)

 const walk = <R>(
  ctx: Interpreter<R>,
-  value: Value,
+  value: unknown,
  replacer: Replacer<R> | undefined,
  boundary: boolean,
 ): Effect.Effect<Json | undefined, unknown, R> => {
@@ -71,7 +69,6 @@ const walk = <R>(
        )
      }
      if (boundary && value instanceof URLSearchParamsObj) return value.params.toString()
-      if (value instanceof HeadersObj) return Object.fromEntries(value.headers)
      const target = boundary && value instanceof SetObj ? new Arr(ctx.builtins.Array, [...value.set]) : value
      if (stack.has(target)) throw typeError("Converting circular structure to JSON.")
      stack.add(target)
@@ -105,7 +102,7 @@ const walk = <R>(
 }

 /** Host JSON as program values: objects and arrays are copied, primitives pass through. */
-export const fromJson = <R>(ctx: Interpreter<R>, value: Json | undefined): Value => {
+export const fromJson = <R>(ctx: Interpreter<R>, value: unknown): unknown => {
  if (value === null || typeof value !== "object") return value
  if (Array.isArray(value))
    return new Arr(
@@ -1,35 +1,24 @@
-import { Cause, Effect, Exit } from "effect"
+import { Effect, Exit } from "effect"
+import { coerceToNumber, coerceToString } from "../stdlib/value.js"
 import type { Interpreter } from "./interpreter.js"
-import { primitivePrototype } from "./intrinsics.js"
-import { GeneratorReturn, typeError } from "./model.js"
-import {
-  Callable,
-  get,
-  Native,
-  DateObj,
-  Obj,
-  coerceToNumber,
-  coerceToString,
-  type Cursor,
-  type Value,
-} from "./objects.js"
+import { typeError } from "./model.js"
+import { Callable, get, Native, DateObj, Obj } from "./objects.js"
 import { typeofValue } from "./references.js"

-/** IteratorClose: a consumer failure closes the iterator and wins over any close failure, except that a generator's
- * return() is a return completion, so a failing close wins over it, as after `break`. */
+export type IteratorCursor<R> = {
+  readonly next: Effect.Effect<{ readonly done: boolean; readonly value: unknown }, unknown, R>
+  readonly close: Effect.Effect<void, unknown, R>
+}
+
 export const preserveConsumerError = <A, R>(
-  close: Cursor<R>["close"],
+  cursor: IteratorCursor<R>,
  effect: Effect.Effect<A, unknown, R>,
 ): Effect.Effect<A, unknown, R> =>
-  Effect.flatMap(Effect.exit(effect), (exit) => {
-    if (Exit.isSuccess(exit)) return Effect.succeed(exit.value)
-    return Effect.flatMap(Effect.exit(close), (closed) => {
-      if (!Exit.isSuccess(closed) && Cause.squash(exit.cause) instanceof GeneratorReturn) {
-        return Effect.failCause(closed.cause)
-      }
-      return Effect.failCause(exit.cause)
-    })
-  })
+  Effect.flatMap(Effect.exit(effect), (exit) =>
+    Exit.isSuccess(exit)
+      ? Effect.succeed(exit.value)
+      : Effect.andThen(Effect.exit(cursor.close), Effect.failCause(exit.cause)),
+  )

 /**
 * ToPrimitive: calls `valueOf`/`toString` in hint order and returns the first primitive result. Dates treat the
@@ -37,9 +26,9 @@ export const preserveConsumerError = <A, R>(
 */
 export const toPrimitive = <R>(
  ctx: Interpreter<R>,
-  value: Value,
+  value: unknown,
  hint: "number" | "string" | "default",
-): Effect.Effect<Value, unknown, R> => {
+): Effect.Effect<unknown, unknown, R> => {
  if (!(value instanceof Obj)) return Effect.succeed(value)
  const asString = hint === "string" || (hint === "default" && value instanceof DateObj)
  const order = asString ? ["toString", "valueOf"] : ["valueOf", "toString"]
@@ -54,31 +43,24 @@ export const toPrimitive = <R>(
  })
 }

-/** Invoke(value, name): calls the method the value would find through its prototype. */
-export const invoke = <R>(ctx: Interpreter<R>, value: Value, name: string, label: string) => {
-  const target = value instanceof Obj ? value : primitivePrototype(ctx.builtins, value)
-  if (target === undefined) throw typeError(`${label} called on null or undefined.`)
-  return ctx.call(get(target, name), value, [])
-}
-
-export const toPrimitiveString = <R>(ctx: Interpreter<R>, value: Value) =>
+export const toPrimitiveString = <R>(ctx: Interpreter<R>, value: unknown) =>
  Effect.map(toPrimitive(ctx, value, "string"), coerceToString)

-export const toPrimitiveNumber = <R>(ctx: Interpreter<R>, value: Value) =>
+export const toPrimitiveNumber = <R>(ctx: Interpreter<R>, value: unknown) =>
  Effect.map(toPrimitive(ctx, value, "number"), coerceToNumber)

 // The single acceptance list for callbacks: collections, sort, string replacers,
 // Array.from mappers, and promise reactions all admit exactly these callables.
 // Admission means dispatchable, not necessarily invocable: new-requiring
 // constructors pass the gate and throw a TypeError on call, like JS.
-export const isSupportedCallback = (value: Value): value is Callable =>
+export const isSupportedCallback = (value: unknown): value is Callable =>
  value instanceof Callable && !(value instanceof Native && !value.callback)

 export const applyCollectionCallback = <R>(
  ctx: Interpreter<R>,
-  callback: Value,
+  callback: unknown,
  name: string,
-): ((args: Array<Value>) => Effect.Effect<Value, unknown, R>) => {
+): ((args: Array<unknown>) => Effect.Effect<unknown, unknown, R>) => {
  if (!isSupportedCallback(callback)) {
    if (typeofValue(callback) === "function") {
      throw typeError(
@@ -6,21 +6,10 @@ import { type AstNode, formatLocation, PendingThrow, Throw, sourceLocation, type
 import { containsRuntimeReference } from "./references.js"
 import { createErrorValue, type ErrorType, isErrorType } from "./intrinsics.js"
 import { constructor, methods, prototypeFrom, receiver } from "./native.js"
-import {
-  type Callable,
-  define,
-  get,
-  has,
-  hidden,
-  type Native,
-  Arr,
-  ErrorObj,
-  Obj,
-  coerceToString,
-  type Value,
-} from "./objects.js"
+import { type Callable, define, get, has, hidden, type Native, Arr, ErrorObj, Obj } from "./objects.js"
 import type { Interpreter } from "./interpreter.js"
 import { formatValue } from "../stdlib/console.js"
+import { coerceToString } from "../stdlib/value.js"

 export const normalizeError = (error: unknown): Diagnostic => {
  if (error instanceof PendingThrow) {
@@ -97,7 +86,7 @@ export const locate = (error: unknown, node?: AstNode): unknown => {
 }

 /** The program value a handler receives for a failure; one failure always yields the same value. */
-export const materialize = <R>(ctx: Interpreter<R>, thrown: unknown): Value => {
+export const materialize = <R>(ctx: Interpreter<R>, thrown: unknown): unknown => {
  if (thrown instanceof Throw) return thrown.value
  const builtins = ctx.builtins
  if (thrown instanceof PendingThrow) {
@@ -124,7 +113,7 @@ const errorToString = (self: Obj): string => {

 export const createAggregateErrorValue = <R>(
  ctx: Interpreter<R>,
-  errors: Array<Value>,
+  errors: Array<unknown>,
  message: string,
  proto: Obj = ctx.builtins.AggregateError,
 ) => {
@@ -135,13 +124,13 @@ export const createAggregateErrorValue = <R>(

 const constructAggregateErrorValue = <R>(
  ctx: Interpreter<R>,
-  args: Array<Value>,
+  args: Array<unknown>,
  proto: Obj,
 ): Effect.Effect<ErrorObj, unknown, R> =>
  Effect.gen(function* () {
    const cursor = yield* ctx.iterate(args[0])
    if (cursor === undefined) throw typeError("new AggregateError(...) expects a synchronous iterable of errors.")
-    const errors: Array<Value> = []
+    const errors: Array<unknown> = []
    while (true) {
      const step = yield* cursor.next
      if (step.done) {
@@ -155,7 +144,7 @@ const constructAggregateErrorValue = <R>(
 export const errorGlobal = <R>(type: ErrorType, ctx: Interpreter<R>) => {
  const builtins = ctx.builtins
  const prototype = builtins[type]
-  const construct = (args: Array<Value>, newTarget: Callable) => {
+  const construct = (args: Array<unknown>, newTarget: Callable) => {
    const proto = prototypeFrom(newTarget, prototype)
    const created =
      type === "AggregateError"
@@ -179,7 +168,6 @@ export const errorGlobal = <R>(type: ErrorType, ctx: Interpreter<R>) => {
    methods(builtins, prototype, [
      ["toString", 0, (thisValue) => errorToString(receiver(Obj, thisValue, "Error.prototype.toString"))],
    ])
-    methods(builtins, ctor, [["isError", 1, (_, args) => args[0] instanceof ErrorObj]])
  }
  return ctor
 }
@@ -1,11 +1,14 @@
 import { parse, type Program } from "acorn"
 import { Cause, Effect, Scope } from "effect"
+// #transpile: conditional import — full typescript on node/bun, an identity
+// pass-through on workerd (the compiler is ~11 MiB and can't init there).
+import { transpile } from "#transpile"
 import type { DataValue, Diagnostic, ResolvedExecutionLimits, Result } from "../codemode.js"
 import { toBoundary } from "../data.js"
 import { ToolRuntime } from "../tool-runtime.js"
 import { normalizeError } from "./errors.js"
-import type { Value } from "./objects.js"
 import { createBuiltins } from "./intrinsics.js"
+import { PendingThrow } from "./model.js"
 import { Pending } from "./promises.js"
 import { Interpreter } from "./interpreter.js"

@@ -14,7 +17,7 @@ export const executeProgram = <R>(
  prepared: ToolRuntime.Prepared<R>,
  limits: ResolvedExecutionLimits,
  hooks: ToolRuntime.Hooks<R>,
-  globals?: (ctx: Interpreter<R>) => ReadonlyArray<readonly [string, Value]>,
+  globals?: (ctx: Interpreter<R>) => ReadonlyArray<readonly [string, unknown]>,
 ): Effect.Effect<Result, never, R> => {
  if (code.trim().length === 0) {
    return Effect.succeed({
@@ -107,7 +110,16 @@ export const executeProgram = <R>(
 }

 const parseProgram = (code: string): Program => {
-  return parse(code, {
+  const transpiled = transpile(`async function __codemode__() {\n${code}\n}`)
+
+  if (transpiled.error !== undefined) {
+    throw new PendingThrow("SyntaxError", `Failed to parse TypeScript: ${transpiled.error}`, undefined, "ParseError")
+  }
+
+  const bodyStart = transpiled.outputText.indexOf("{") + 1
+  const bodyEnd = transpiled.outputText.lastIndexOf("}")
+  const executableCode = transpiled.outputText.slice(bodyStart, bodyEnd)
+  return parse(executableCode, {
    ecmaVersion: "latest",
    sourceType: "script",
    allowReturnOutsideFunction: true,
--- a/Show More
+++ b/Show More