refactor(codemode): check the Headers receiver before calling the host

test(codemode): keep only the Headers WPT cases that exercise the runtime
fix(codemode): let Headers methods report a bad receiver
2026-09-18 23:06:25 +00:00 · 2026-09-18 01:05:10 -05:00 · 2026-09-18 01:05:09 -05:00 · 2026-09-18 01:05:09 -05:00 · 2026-09-18 01:05:09 -05:00 · 2026-09-18 01:05:09 -05:00
101 changed files with 1253 additions and 985 deletions
@@ -184,7 +184,6 @@ const table = sqliteTable("session", {
 - Keep `SessionRunner`, model resolution, tool registry, permissions, and filesystem Location-scoped. Omitted `Location.workspaceID` means implicit-local placement; explicit workspace identity remains reserved for future placement semantics.
 - Preserve one explicit `llm.stream(request)` call per Physical Attempt and reload projected history before durable continuation. A logical Step may use generic pre-output retries, one full-context retry after continuation rejection, incomplete-stream continuation, or one overflow-compaction rebuild. Generic retries retain the logical step number and do not consume another agent-step allowance. Do not delegate orchestration to an in-memory tool loop.
 - Keep local Session drains process-local until clustering is implemented. `SessionRunCoordinator` joins explicit same-Session resumes, coalesces prompt wakeups, and allows different Sessions to run concurrently. A write-ahead execution claim marks a process-local busy period for restart recovery: terminal completion, failure, or user interruption releases it, while shutdown interruption and process death preserve it. Startup recovery resumes claimed top-level Sessions with durable per-execution attempt accounting. The claim is a recovery marker, not clustered ownership, fencing, or an exactly-once guarantee.
- Keep native compaction mechanisms out of `SessionCompaction`. Plugins register `native` strategies through the `SessionCompaction` editor that turn a prepared request into a replacement window (the built-in `NativeCompactionPlugin` handles `@opencode/ai` compaction operations); later registrations win. Core owns the provider-mode decision, route provenance, the retry policy, overflow recovery, interruption, usage accounting, and checkpoint persistence.
 - Keep delivery vocabulary explicit. Prompts steer by default. At safe step boundaries, steered compaction takes priority up to the first steered move control; other steers retain enqueue order. At an idle boundary, steers take priority; otherwise exactly one queued item delivers before the runner reevaluates continuation. Inbox items may be cancelled or changed between queue and steer before delivery. Promoting new user input resets the selected agent's step allowance; a batch of steers resets it once.
 - One step is one logical LLM call; its durable record covers only the model-visible span. Do not write "provider turn", and do not use bare "turn" for a single call: "turn" is reserved for the future assistant-turn unit containing all steps from prompt promotion until the session would go idle.
 - Keep event replay ownership separate from clustered Session execution ownership.
@@ -32,7 +32,7 @@
    },
    "packages/ai": {
      "name": "@opencode/ai",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@aws-sdk/credential-providers": "3.1057.0",
        "@opencode/schema": "workspace:*",
@@ -54,7 +54,7 @@
    },
    "packages/app": {
      "name": "@opencode/app",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@corvu/drawer": "catalog:",
        "@dnd-kit/abstract": "0.5.0",
@@ -113,7 +113,7 @@
    },
    "packages/cli": {
      "name": "@opencode/cli",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "bin": {
        "opencode2": "./bin/opencode2.cjs",
      },
@@ -177,7 +177,7 @@
    },
    "packages/client": {
      "name": "@opencode/client",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/protocol": "workspace:*",
        "@opencode/schema": "workspace:*",
@@ -203,7 +203,7 @@
    },
    "packages/codemode": {
      "name": "@opencode/codemode",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "acorn": "8.15.0",
        "effect": "catalog:",
@@ -217,7 +217,7 @@
    },
    "packages/console/app": {
      "name": "@opencode/console-app",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@cloudflare/vite-plugin": "1.15.2",
        "@ibm/plex": "6.4.1",
@@ -253,7 +253,7 @@
    },
    "packages/console/core": {
      "name": "@opencode/console-core",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@aws-sdk/client-sts": "3.782.0",
        "@jsx-email/render": "1.1.1",
@@ -280,7 +280,7 @@
    },
    "packages/console/function": {
      "name": "@opencode/console-function",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@openauthjs/openauth": "0.0.0-20250322224806",
        "@opencode/console-core": "workspace:*",
@@ -297,7 +297,7 @@
    },
    "packages/console/mail": {
      "name": "@opencode/console-mail",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@jsx-email/all": "2.2.3",
        "@jsx-email/cli": "1.4.3",
@@ -321,7 +321,7 @@
    },
    "packages/console/support": {
      "name": "@opencode/console-support",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@cloudflare/vite-plugin": "1.15.2",
        "@opencode/console-core": "workspace:*",
@@ -341,7 +341,7 @@
    },
    "packages/core": {
      "name": "@opencode/core",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@ai-sdk/cohere": "3.0.27",
        "@ai-sdk/gateway": "3.0.104",
@@ -409,7 +409,7 @@
    },
    "packages/desktop": {
      "name": "@opencode/desktop",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@zip.js/zip.js": "2.7.62",
        "electron-context-menu": "4.1.2",
@@ -456,11 +456,12 @@
        "@lydell/node-pty-linux-x64": "1.2.0-beta.12",
        "@lydell/node-pty-win32-arm64": "1.2.0-beta.12",
        "@lydell/node-pty-win32-x64": "1.2.0-beta.12",
+        "msgpackr-extract": "3.0.4",
      },
    },
    "packages/enterprise": {
      "name": "@opencode/enterprise",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@hono/standard-validator": "catalog:",
        "@opencode-ai/sdk": "1.18.21",
@@ -497,7 +498,7 @@
    },
    "packages/function": {
      "name": "@opencode/function",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@octokit/auth-app": "8.0.1",
        "@octokit/rest": "catalog:",
@@ -513,7 +514,7 @@
    },
    "packages/http-recorder": {
      "name": "@opencode/http-recorder",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@effect/platform-node-shared": "4.0.0-rc.112",
      },
@@ -532,7 +533,7 @@
    },
    "packages/httpapi-codegen": {
      "name": "@opencode/httpapi-codegen",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "effect": "catalog:",
        "prettier": "3.6.2",
@@ -545,7 +546,7 @@
    },
    "packages/latex": {
      "name": "@opencode/latex",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/plugin": "workspace:*",
        "@opentui/core": "catalog:",
@@ -559,7 +560,7 @@
    },
    "packages/merman": {
      "name": "@opencode/merman",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/plugin": "workspace:*",
        "@opentui/core": "catalog:",
@@ -574,7 +575,7 @@
    },
    "packages/plugin": {
      "name": "@opencode/plugin",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@ai-sdk/provider": "3.0.8",
        "@opencode/ai": "workspace:*",
@@ -613,7 +614,7 @@
    },
    "packages/plugin-browser": {
      "name": "@opencode/plugin-browser",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/plugin": "workspace:*",
        "@opencode/schema": "workspace:*",
@@ -643,7 +644,7 @@
    },
    "packages/protocol": {
      "name": "@opencode/protocol",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/schema": "workspace:*",
        "effect": "catalog:",
@@ -658,7 +659,7 @@
    },
    "packages/schema": {
      "name": "@opencode/schema",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@standard-schema/spec": "catalog:",
        "effect": "catalog:",
@@ -682,7 +683,7 @@
    },
    "packages/sdk": {
      "name": "@opencode/sdk",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/client": "workspace:*",
        "@opencode/core": "workspace:*",
@@ -703,7 +704,7 @@
    },
    "packages/server": {
      "name": "@opencode/server",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@effect/platform-node": "catalog:",
        "@effect/platform-node-shared": "catalog:",
@@ -725,7 +726,7 @@
    },
    "packages/session-ui": {
      "name": "@opencode/session-ui",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@kobalte/core": "catalog:",
        "@opencode/client": "workspace:*",
@@ -760,7 +761,7 @@
    },
    "packages/simulation": {
      "name": "@opencode/simulation",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/ai": "workspace:*",
        "@opencode/core": "workspace:*",
@@ -780,7 +781,7 @@
    },
    "packages/stats/app": {
      "name": "@opencode/stats-app",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@ibm/plex": "6.4.1",
        "@kobalte/core": "catalog:",
@@ -814,7 +815,7 @@
    },
    "packages/stats/core": {
      "name": "@opencode/stats-core",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@aws-sdk/client-athena": "3.933.0",
        "@planetscale/database": "1.19.0",
@@ -833,7 +834,7 @@
    },
    "packages/stats/server": {
      "name": "@opencode/stats-server",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@aws-sdk/client-firehose": "3.933.0",
        "@effect/platform-node": "catalog:",
@@ -879,7 +880,7 @@
    },
    "packages/theme": {
      "name": "@opencode/theme",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opentui/core": "catalog:",
        "effect": "catalog:",
@@ -893,7 +894,7 @@
    },
    "packages/tui": {
      "name": "@opencode/tui",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@opencode/client": "workspace:*",
        "@opencode/core": "workspace:*",
@@ -928,7 +929,7 @@
    },
    "packages/ui": {
      "name": "@opencode/ui",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@kobalte/core": "catalog:",
        "@pierre/diffs": "catalog:",
@@ -963,7 +964,7 @@
    },
    "packages/util": {
      "name": "@opencode/util",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@effect/opentelemetry": "catalog:",
        "@effect/platform-node": "catalog:",
@@ -996,7 +997,7 @@
    },
    "packages/web": {
      "name": "@opencode/web",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "@astrojs/cloudflare": "12.6.3",
        "@astrojs/markdown-remark": "6.3.1",
@@ -1037,7 +1038,7 @@
    },
    "services/update": {
      "name": "@opencode/update",
-      "version": "2.0.8",
+      "version": "2.0.7",
      "dependencies": {
        "jose": "6.0.11",
        "semver": "catalog:",
@@ -1,8 +1,8 @@
 {
  "nodeModules": {
-    "x86_64-linux": "sha256-TlCPtuIvTNF01fLI0yHCLzVkx53yF9xxvAObDMGeo8M=",
-    "aarch64-linux": "sha256-aEjyPIXHeA5w1iZXbPKJAOIJQBfXg+LAx/y7C5uFz4g=",
-    "aarch64-darwin": "sha256-lthMTio2qNy+H2tL9cAPmqC41O+wdSADI61cnW4dIb0=",
-    "x86_64-darwin": "sha256-ONFbRQnwzOYHo0Pyh327QfJG2uzqzNEn/SS2vbYYMdM="
+    "x86_64-linux": "sha256-U9IuP/ev6w4urvogOwQyl3rdumY6W4YaY18NkFaOVHU=",
+    "aarch64-linux": "sha256-Wc8OT2DRZpVo56KaoGE0Hsj1NDknakbWXO9w2qy6j+0=",
+    "aarch64-darwin": "sha256-wAea8+jajnMDxZ6XJL+Hsrf0621hwtBtWyD1+dS45dE=",
+    "x86_64-darwin": "sha256-g8PCNBSV6rO+VQjKU9AtYqj+r18o+fhLDXEQq+X2EZ4="
  }
 }
@@ -2,7 +2,7 @@
  "$schema": "https://json.schemastore.org/package.json",
  "name": "opencode",
  "description": "AI-powered development tool",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "packageManager": "bun@1.4.2",
@@ -1,6 +1,6 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "name": "@opencode/ai",
  "type": "module",
  "license": "MIT",
@@ -8,7 +8,7 @@ import { OpenResponsesOptions } from "./utils/open-responses-options.js"
 export type ReasoningEffort = OpenResponsesOptions.ReasoningEffort

 const Options = Schema.Struct({
-  reasoningEffort: Schema.optional(OpenResponsesOptions.ReasoningEffort),
+  reasoningEffort: OpenResponsesOptions.Options.fields.reasoningEffort,
  enableThinking: Schema.optional(Schema.Boolean),
  thinkingBudget: Schema.optional(Schema.Int),
  preserveThinking: Schema.optional(Schema.Boolean),
@@ -19,7 +19,7 @@ const Options = Schema.Struct({
    }),
  ),
  toolStream: Schema.optional(Schema.Boolean),
-  parallelToolCalls: Schema.optional(Schema.Boolean),
+  parallelToolCalls: OpenResponsesOptions.Options.fields.parallelToolCalls,
  repetitionPenalty: Schema.optional(Schema.Number),
  responseFormat: Schema.optional(
    Schema.Struct({
@@ -6,9 +6,9 @@ import { OpenResponsesOptions } from "./utils/open-responses-options.js"
 import { ResponsesHostedTools } from "./utils/responses-hosted-tools.js"

 const Options = Schema.Struct({
-  reasoningEffort: Schema.optional(OpenResponsesOptions.ReasoningEffort),
+  reasoningEffort: OpenResponsesOptions.Options.fields.reasoningEffort,
  enableThinking: Schema.optional(Schema.Boolean),
-  store: Schema.optional(Schema.Boolean),
+  store: OpenResponsesOptions.Options.fields.store,
  previousResponseId: Schema.optional(Schema.String),
  conversation: Schema.optional(Schema.String),
 })
@@ -1,5 +1,5 @@
 import { Buffer } from "node:buffer"
-import { Effect, Option, Schema, SchemaGetter } from "effect"
+import { Effect, Option, Schema } from "effect"
 import { Tool } from "@opencode/schema/tool"
 import { Route } from "../route/client.js"
 import { Auth } from "../route/auth.js"
@@ -21,12 +21,11 @@ import {
  type JsonSchema,
  type MediaPart,
  type ProviderMetadata,
-  type ProviderOptions,
  type ToolCallPart,
  type ToolDefinition,
  type ToolResultPart,
 } from "../schema/index.js"
-import { JsonObject, knownString, optionalArray, optionalNull, ProviderShared } from "./shared.js"
+import { JsonObject, optionalArray, optionalNull, ProviderShared } from "./shared.js"
 import { classifyProviderFailure } from "../provider-error.js"
 import { effortUpdate, resolveEffortUpdates } from "../effort-updates.js"
 import * as Cache from "./utils/cache.js"
@@ -53,10 +52,57 @@ const SSE_EVENTS = new Set([
 ])
 export const framing = Framing.sseEvents(SSE_EVENTS)

-export type ThinkingBlockBinding = typeof AnthropicThinkingBlockBinding.Type
-export type ThinkingInput = typeof Thinking.Encoded
-/** Caller-facing provider options; unknown keys are accepted and ignored. `Options.Type` is the wire-ready form. */
-export type OptionsInput = ProviderOptions & typeof Options.Encoded
+export type ThinkingBlockBinding = {
+  readonly prefix_mismatch_behavior?: "error" | "drop_block" | (string & {})
+}
+
+export type ThinkingInput =
+  | {
+      readonly type: "adaptive"
+      readonly display?: "summarized" | "omitted"
+      readonly block_binding?: ThinkingBlockBinding
+    }
+  | {
+      readonly type: "disabled"
+    }
+  | ({
+      readonly type: "enabled"
+      readonly display?: "summarized" | "omitted"
+      readonly block_binding?: ThinkingBlockBinding
+    } & (
+      | { readonly budgetTokens: number; readonly budget_tokens?: number }
+      | { readonly budgetTokens?: number; readonly budget_tokens: number }
+    ))
+
+export interface OptionsInput {
+  /** Advanced in-band compaction. The caller owns checkpoint persistence and recovery. */
+  readonly contextManagement?: ContextManagement
+  readonly [key: string]: unknown
+  readonly thinking?: ThinkingInput
+  readonly effort?: string
+  readonly service_tier?: "auto" | "standard_only"
+  readonly serviceTier?: "auto" | "standard_only"
+  // SDK Metadata:2649 {user_id?: string | null}
+  readonly metadata?: { readonly user_id?: string | null }
+  // SDK MessageCreateParamsContainer:2596 ContainerParams|string
+  readonly container?:
+    | string
+    | { readonly id?: string | null; readonly skills?: ReadonlyArray<Record<string, unknown>> | null }
+  readonly inference_geo?: string | null
+  readonly inferenceGeo?: string | null
+  readonly cache_control?: { readonly type: "ephemeral"; readonly ttl?: "5m" | "1h" }
+  readonly cacheControl?: { readonly type: "ephemeral"; readonly ttl?: "5m" | "1h" }
+  // SDK OutputConfig:2684 {effort, format: JSONOutputFormat}
+  readonly output_config?: {
+    readonly effort?: string | null
+    readonly format?: { readonly type: "json_schema"; readonly schema: Record<string, unknown> } | null
+  }
+  readonly outputConfig?: {
+    readonly effort?: string | null
+    readonly format?: { readonly type: "json_schema"; readonly schema: Record<string, unknown> } | null
+  }
+}
+
 export type ProviderOptionsInput = OptionsInput

 export const ContextManagement = Schema.Struct({
@@ -83,7 +129,6 @@ const AnthropicCacheControl = Schema.Struct({
  type: Schema.tag("ephemeral"),
  ttl: Schema.optional(Schema.Literals(["5m", "1h"])),
 })
-const AnthropicServiceTier = Schema.Literals(["auto", "standard_only"])

 const AnthropicTextBlock = Schema.Struct({
  type: Schema.tag("text"),
@@ -272,21 +317,25 @@ const AnthropicToolChoice = Schema.Union([
 ])

 const AnthropicThinkingBlockBinding = Schema.Struct({
-  prefix_mismatch_behavior: Schema.optional(knownString<"error" | "drop_block">()),
+  prefix_mismatch_behavior: Schema.optional(Schema.String),
 })

-const AnthropicThinkingFields = {
-  display: Schema.optional(Schema.Literals(["summarized", "omitted"])),
-  block_binding: Schema.optional(AnthropicThinkingBlockBinding),
-}
-const AnthropicThinkingEnabled = Schema.Struct({
-  type: Schema.tag("enabled"),
-  budget_tokens: Schema.Number,
-  ...AnthropicThinkingFields,
-})
-const AnthropicThinkingAdaptive = Schema.Struct({ type: Schema.tag("adaptive"), ...AnthropicThinkingFields })
-const AnthropicThinkingDisabled = Schema.Struct({ type: Schema.tag("disabled") })
-const AnthropicThinking = Schema.Union([AnthropicThinkingEnabled, AnthropicThinkingAdaptive, AnthropicThinkingDisabled])
+const AnthropicThinking = Schema.Union([
+  Schema.Struct({
+    type: Schema.tag("enabled"),
+    budget_tokens: Schema.Number,
+    display: Schema.optional(Schema.Literals(["summarized", "omitted"])),
+    block_binding: Schema.optional(AnthropicThinkingBlockBinding),
+  }),
+  Schema.Struct({
+    type: Schema.tag("adaptive"),
+    display: Schema.optional(Schema.Literals(["summarized", "omitted"])),
+    block_binding: Schema.optional(AnthropicThinkingBlockBinding),
+  }),
+  Schema.Struct({
+    type: Schema.tag("disabled"),
+  }),
+])
 type AnthropicThinking = typeof AnthropicThinking.Type

 // SDK OutputConfig:2684 {effort?: "low"|"medium"|"high"|"xhigh"|"max"|null, format?: JSONOutputFormat:2399}
@@ -311,53 +360,6 @@ const AnthropicContainer = Schema.Union([
  }),
 ])

-// =============================================================================
-// Provider Options
-// =============================================================================
-// Callers spell the budget as `budgetTokens` or the wire `budget_tokens`; the
-// keys are disjoint per variant so the input type requires exactly one and the
-// transform can narrow on it. Decoding straight to the wire block keeps the
-// alias out of the rest of the file.
-const ThinkingEnabledInput = Schema.Union([
-  Schema.Struct({ type: Schema.tag("enabled"), budgetTokens: Schema.Number, ...AnthropicThinkingFields }),
-  Schema.Struct({ type: Schema.tag("enabled"), budget_tokens: Schema.Number, ...AnthropicThinkingFields }),
-]).pipe(
-  Schema.decodeTo(AnthropicThinkingEnabled, {
-    decode: SchemaGetter.transform((input) => ({
-      type: "enabled" as const,
-      budget_tokens: "budgetTokens" in input ? input.budgetTokens : input.budget_tokens,
-      display: input.display,
-      block_binding: input.block_binding,
-    })),
-    encode: SchemaGetter.passthrough({ strict: false }),
-  }),
-)
-const Thinking = Schema.Union([ThinkingEnabledInput, AnthropicThinkingAdaptive, AnthropicThinkingDisabled])
-
-const OutputConfigInput = Schema.Struct({
-  effort: optionalNull(Schema.String),
-  format: optionalNull(AnthropicJsonOutputFormat),
-})
-
-// Both key spellings are accepted; `fromRequest` prefers the snake_case one.
-const Options = Schema.Struct({
-  /** Advanced in-band compaction. The caller owns checkpoint persistence and recovery. */
-  contextManagement: Schema.optional(ContextManagement),
-  thinking: Schema.optional(Thinking),
-  effort: Schema.optional(Schema.String),
-  service_tier: Schema.optional(AnthropicServiceTier),
-  serviceTier: Schema.optional(AnthropicServiceTier),
-  metadata: Schema.optional(AnthropicMetadata),
-  container: Schema.optional(AnthropicContainer),
-  inference_geo: optionalNull(Schema.String),
-  inferenceGeo: optionalNull(Schema.String),
-  cache_control: Schema.optional(AnthropicCacheControl),
-  cacheControl: Schema.optional(AnthropicCacheControl),
-  output_config: Schema.optional(OutputConfigInput),
-  outputConfig: Schema.optional(OutputConfigInput),
-})
-const decodeOptions = ProviderShared.validateWith(Schema.decodeUnknownEffect(Options))
-
 const AnthropicBodyFields = {
  context_management: Schema.optional(
    Schema.Struct({
@@ -389,7 +391,7 @@ const AnthropicBodyFields = {
  container: Schema.optional(Schema.NullOr(AnthropicContainer)),
  inference_geo: Schema.optional(Schema.NullOr(Schema.String)),
  metadata: Schema.optional(AnthropicMetadata),
-  service_tier: Schema.optional(AnthropicServiceTier),
+  service_tier: Schema.optional(Schema.Literals(["auto", "standard_only"])),
 }
 export const AnthropicMessagesBody = Schema.Struct(AnthropicBodyFields)
 export type AnthropicMessagesBody = Schema.Schema.Type<typeof AnthropicMessagesBody>
@@ -999,6 +1001,64 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
  return messages
 })

+const resolveOptions = Effect.fn("AnthropicMessages.resolveOptions")(function* (request: LLMRequest) {
+  const input = request.providerOptions as Record<string, unknown> | undefined
+  const rawServiceTier =
+    (input as Record<string, unknown> | undefined)?.service_tier ??
+    (input as Record<string, unknown> | undefined)?.serviceTier
+  const service_tier =
+    rawServiceTier === "auto" || rawServiceTier === "standard_only"
+      ? (rawServiceTier as "auto" | "standard_only")
+      : undefined
+  const rawMetadata = (input as Record<string, unknown> | undefined)?.metadata
+  const metadata =
+    ProviderShared.isRecord(rawMetadata) && (typeof rawMetadata.user_id === "string" || rawMetadata.user_id === null)
+      ? { user_id: rawMetadata.user_id as string | null }
+      : undefined
+  const container =
+    typeof (input as Record<string, unknown> | undefined)?.container === "string" ||
+    ProviderShared.isRecord((input as Record<string, unknown> | undefined)?.container)
+      ? ((input as Record<string, unknown>).container as
+          | string
+          | { id?: string | null; skills?: ReadonlyArray<Record<string, unknown>> | null })
+      : undefined
+  const rawInferenceGeo =
+    (input as Record<string, unknown> | undefined)?.inference_geo ??
+    (input as Record<string, unknown> | undefined)?.inferenceGeo
+  const inference_geo = typeof rawInferenceGeo === "string" ? rawInferenceGeo : undefined
+  const rawCacheControl =
+    (input as Record<string, unknown> | undefined)?.cache_control ??
+    (input as Record<string, unknown> | undefined)?.cacheControl
+  const cache_control =
+    ProviderShared.isRecord(rawCacheControl) && rawCacheControl.type === "ephemeral"
+      ? (rawCacheControl as { type: "ephemeral"; ttl?: "5m" | "1h" })
+      : undefined
+  const rawOutputConfig =
+    (input as Record<string, unknown> | undefined)?.output_config ??
+    (input as Record<string, unknown> | undefined)?.outputConfig
+  const outputConfigEffort =
+    typeof (input as Record<string, unknown> | undefined)?.effort === "string"
+      ? ((input as Record<string, unknown>).effort as string)
+      : ProviderShared.isRecord(rawOutputConfig) && typeof rawOutputConfig.effort === "string"
+        ? (rawOutputConfig.effort as string)
+        : undefined
+  const outputConfigFormat =
+    ProviderShared.isRecord(rawOutputConfig) && ProviderShared.isRecord(rawOutputConfig.format)
+      ? (rawOutputConfig.format as { type: "json_schema"; schema: Record<string, unknown> })
+      : undefined
+  const thinking = yield* resolveThinking(input?.thinking)
+  return {
+    thinking: applyThinkingBindingDefault(request.model, thinking),
+    effort: outputConfigEffort,
+    format: outputConfigFormat,
+    service_tier,
+    metadata,
+    container,
+    inference_geo,
+    cache_control,
+  }
+})
+
 // Accept gateway namespaces and Vertex suffixes without treating a snapshot date as a minor version.
 const claudeVersion = (id: string) => {
  const match = /(?:^|[./])claude-(?<family>[a-z]+)-(?<major>\d+)(?:[.-](?<minor>\d{1,2}))?(?:$|[-:@])/.exec(
@@ -1037,12 +1097,35 @@ const applyThinkingBindingDefault = (model: LLMRequest["model"], thinking: Anthr
  }
 }

+const resolveThinking = Effect.fn("AnthropicMessages.resolveThinking")(function* (input: unknown) {
+  if (!ProviderShared.isRecord(input)) return undefined
+  if (input.type === "disabled") return { type: "disabled" as const }
+  if (input.type !== "adaptive" && input.type !== "enabled") return undefined
+  const block_binding = yield* ProviderShared.validateWith(
+    Schema.decodeUnknownEffect(Schema.UndefinedOr(AnthropicThinkingBlockBinding)),
+  )(input.block_binding)
+  const display =
+    input.display === "summarized" || input.display === "omitted"
+      ? (input.display as "summarized" | "omitted")
+      : undefined
+  if (input.type === "adaptive") return { type: "adaptive" as const, display, block_binding }
+  const budget =
+    typeof input.budgetTokens === "number"
+      ? input.budgetTokens
+      : typeof input.budget_tokens === "number"
+        ? input.budget_tokens
+        : undefined
+  if (budget === undefined)
+    return yield* ProviderShared.invalidRequest("Anthropic thinking provider option requires budgetTokens")
+  return { type: "enabled" as const, budget_tokens: budget, display, block_binding }
+})
+
 const fromRequest = Effect.fn("AnthropicMessages.fromRequest")(function* (request: LLMRequest) {
-  const options = yield* decodeOptions(request.providerOptions ?? {})
-  const management = options.contextManagement
-  const outputConfig = options.output_config ?? options.outputConfig
-  const format = outputConfig?.format ?? undefined
-  const updates = resolveEffortUpdates(request, options.effort ?? outputConfig?.effort ?? undefined)
+  const management = yield* ProviderShared.validateWith(
+    Schema.decodeUnknownEffect(Schema.UndefinedOr(ContextManagement)),
+  )(request.providerOptions?.contextManagement)
+  const options = yield* resolveOptions(request)
+  const updates = resolveEffortUpdates(request, options.effort)
  const generation = request.generation
  const toolSchemaCompatibility = request.model.compatibility?.toolSchema
  // Allocate the 4-breakpoint budget in invalidation order: tools → system →
@@ -1078,7 +1161,12 @@ const fromRequest = Effect.fn("AnthropicMessages.fromRequest")(function* (reques
    )
  }
  const output_config =
-    updates.effort === undefined && format === undefined ? undefined : { effort: updates.effort, format }
+    updates.effort === undefined && options.format === undefined
+      ? undefined
+      : {
+          ...(updates.effort === undefined ? {} : { effort: updates.effort }),
+          ...(options.format === undefined ? {} : { format: options.format }),
+        }
  const body = {
    model: request.model.id,
    system,
@@ -1091,14 +1179,14 @@ const fromRequest = Effect.fn("AnthropicMessages.fromRequest")(function* (reques
    top_p: generation?.topP,
    top_k: generation?.topK,
    stop_sequences: generation?.stop,
-    thinking: applyThinkingBindingDefault(request.model, options.thinking),
+    thinking: options.thinking,
    output_config,
    // top-level passthrough per SDK MessageCreateParamsBase:4638,4643,4649,4654,4670
-    cache_control: options.cache_control ?? options.cacheControl,
+    cache_control: options.cache_control,
    container: options.container,
-    inference_geo: options.inference_geo ?? options.inferenceGeo ?? undefined,
+    inference_geo: options.inference_geo,
    metadata: options.metadata,
-    service_tier: options.service_tier ?? options.serviceTier,
+    service_tier: options.service_tier,
  }
  if (!management) return body
  return {
@@ -14,13 +14,12 @@ import {
  type LLMRequest,
  type MediaPart,
  type ProviderMetadata,
-  type ProviderOptions,
  type TextPart,
  type ToolCallPart,
  type ToolDefinition,
 } from "../schema/index.js"
 import { classifyProviderFailure } from "../provider-error.js"
-import { JsonObject, knownString, lenient, optionalArray, optionalNull, ProviderShared } from "./shared.js"
+import { JsonObject, optionalArray, optionalNull, ProviderShared } from "./shared.js"
 import { GeminiToolSchema } from "./utils/gemini-tool-schema.js"
 import { Lifecycle } from "./utils/lifecycle.js"
 import { ToolSchemaProjection } from "./utils/tool-schema.js"
@@ -51,8 +50,35 @@ const omitsFunctionCallIds = (modelID: string) => {
  return match !== null && Number(match[1]) < 3
 }

-/** Caller-facing provider options; unknown keys are accepted and ignored. */
-export type OptionsInput = ProviderOptions & typeof Options.Encoded
+export interface OptionsInput {
+  readonly [key: string]: unknown
+  readonly cachedContent?: string
+  readonly safetySettings?: ReadonlyArray<{
+    readonly category:
+      | "HARM_CATEGORY_UNSPECIFIED"
+      | "HARM_CATEGORY_HATE_SPEECH"
+      | "HARM_CATEGORY_DANGEROUS_CONTENT"
+      | "HARM_CATEGORY_HARASSMENT"
+      | "HARM_CATEGORY_SEXUALLY_EXPLICIT"
+      | "HARM_CATEGORY_CIVIC_INTEGRITY"
+      | (string & {})
+    readonly threshold:
+      | "HARM_BLOCK_THRESHOLD_UNSPECIFIED"
+      | "BLOCK_LOW_AND_ABOVE"
+      | "BLOCK_MEDIUM_AND_ABOVE"
+      | "BLOCK_ONLY_HIGH"
+      | "BLOCK_NONE"
+      | "OFF"
+      | (string & {})
+  }>
+  readonly serviceTier?: "standard" | "flex" | "priority" | (string & {})
+  readonly thinkingConfig?: {
+    readonly thinkingBudget?: number
+    readonly includeThoughts?: boolean
+    readonly thinkingLevel?: "minimal" | "low" | "medium" | "high" | (string & {})
+  }
+}
+
 export type ProviderOptionsInput = OptionsInput

 // =============================================================================
@@ -135,50 +161,17 @@ const GeminiToolConfig = Schema.Struct({
  }),
 })

-const GeminiThinkingLevel = knownString<"minimal" | "low" | "medium" | "high">()
 const GeminiThinkingConfig = Schema.Struct({
  thinkingBudget: Schema.optional(Schema.Number),
  includeThoughts: Schema.optional(Schema.Boolean),
-  thinkingLevel: Schema.optional(GeminiThinkingLevel),
+  thinkingLevel: Schema.optional(Schema.String),
 })

 const GeminiSafetySetting = Schema.Struct({
-  category: knownString<
-    | "HARM_CATEGORY_UNSPECIFIED"
-    | "HARM_CATEGORY_HATE_SPEECH"
-    | "HARM_CATEGORY_DANGEROUS_CONTENT"
-    | "HARM_CATEGORY_HARASSMENT"
-    | "HARM_CATEGORY_SEXUALLY_EXPLICIT"
-    | "HARM_CATEGORY_CIVIC_INTEGRITY"
-  >(),
-  threshold: knownString<
-    | "HARM_BLOCK_THRESHOLD_UNSPECIFIED"
-    | "BLOCK_LOW_AND_ABOVE"
-    | "BLOCK_MEDIUM_AND_ABOVE"
-    | "BLOCK_ONLY_HIGH"
-    | "BLOCK_NONE"
-    | "OFF"
-  >(),
+  category: Schema.String,
+  threshold: Schema.String,
 })

-// =============================================================================
-// Provider Options
-// =============================================================================
-// Malformed fields are dropped rather than failing the request; a `thinkingConfig`
-// object that omits `includeThoughts` asks for thoughts.
-const GeminiThinkingConfigInput = Schema.Struct({
-  thinkingBudget: lenient(Schema.Number),
-  includeThoughts: lenient(Schema.Boolean),
-  thinkingLevel: lenient(GeminiThinkingLevel),
-})
-const Options = Schema.Struct({
-  cachedContent: lenient(Schema.String),
-  safetySettings: lenient(Schema.Array(GeminiSafetySetting)),
-  serviceTier: lenient(knownString<"standard" | "flex" | "priority">()),
-  thinkingConfig: lenient(GeminiThinkingConfigInput),
-})
-const decodeOptions = ProviderShared.validateWith(Schema.decodeUnknownEffect(Options))
-
 const GeminiGenerationConfig = Schema.Struct({
  maxOutputTokens: Schema.optional(Schema.Number),
  temperature: Schema.optional(Schema.Number),
@@ -438,11 +431,44 @@ const lowerMessages = Effect.fn("Gemini.lowerMessages")(function* (request: LLMR
  return contents
 })

+const resolveOptions = (request: LLMRequest) => {
+  const input = request.providerOptions
+  const value = input?.thinkingConfig
+  const thinkingConfig = {
+    thinkingBudget:
+      ProviderShared.isRecord(value) && typeof value.thinkingBudget === "number" ? value.thinkingBudget : undefined,
+    includeThoughts:
+      ProviderShared.isRecord(value) && typeof value.includeThoughts === "boolean"
+        ? value.includeThoughts
+        : ProviderShared.isRecord(value)
+          ? true
+          : undefined,
+    thinkingLevel:
+      ProviderShared.isRecord(value) && typeof value.thinkingLevel === "string" ? value.thinkingLevel : undefined,
+  }
+  return {
+    cachedContent: typeof input?.cachedContent === "string" ? input.cachedContent : undefined,
+    safetySettings: mapSafetySettings(input?.safetySettings),
+    serviceTier: typeof input?.serviceTier === "string" ? input.serviceTier : undefined,
+    thinkingConfig: Object.values(thinkingConfig).some((item) => item !== undefined) ? thinkingConfig : undefined,
+  }
+}
+
+function mapSafetySettings(value: unknown) {
+  if (!Array.isArray(value)) return undefined
+  const settings = value.flatMap((item) =>
+    ProviderShared.isRecord(item) && typeof item.category === "string" && typeof item.threshold === "string"
+      ? [{ category: item.category, threshold: item.threshold }]
+      : [],
+  )
+  return settings
+}
+
 const fromRequest = Effect.fn("Gemini.fromRequest")(function* (request: LLMRequest) {
  const flattened = ProviderShared.flattenToolRequest(request)
  const hasTools = flattened.tools.length > 0
  const generation = request.generation
-  const options = yield* decodeOptions(request.providerOptions ?? {})
+  const options = resolveOptions(request)
  const toolSchemaCompatibility = request.model.compatibility?.toolSchema
  const generationConfig = {
    maxOutputTokens: generation?.maxTokens,
@@ -453,10 +479,7 @@ const fromRequest = Effect.fn("Gemini.fromRequest")(function* (request: LLMReque
    presencePenalty: generation?.presencePenalty,
    seed: generation?.seed,
    stopSequences: generation?.stop,
-    thinkingConfig:
-      options.thinkingConfig === undefined
-        ? undefined
-        : { ...options.thinkingConfig, includeThoughts: options.thinkingConfig.includeThoughts ?? true },
+    thinkingConfig: options.thinkingConfig,
  }

  return {
@@ -1,6 +1,6 @@
 import { Buffer } from "node:buffer"
 import { Tool } from "@opencode/schema/tool"
-import { Effect, Option, Schema, Stream } from "effect"
+import { Effect, Schema, Stream } from "effect"
 import * as Sse from "effect/unstable/encoding/Sse"
 import { Headers, HttpClientRequest, HttpClientResponse } from "effect/unstable/http"
 import {
@@ -29,16 +29,6 @@ const isJson = Schema.is(Schema.Json)
 export const JsonObject = Schema.Record(Schema.String, Schema.Unknown)
 export const optionalArray = <const S extends Schema.Top>(schema: S) => Schema.optional(Schema.Array(schema))
 export const optionalNull = <const S extends Schema.Top>(schema: S) => Schema.optional(Schema.NullOr(schema))
-/** Optional field whose malformed value decodes to `undefined` instead of failing the enclosing struct. */
-export const lenient = <const S extends Schema.Top>(schema: S) =>
-  Schema.optionalKey(
-    Schema.UndefinedOr(schema).pipe(Schema.catchDecoding(() => Effect.succeed(Option.some(undefined)))),
-  )
-/** Provider-defined string enum: known values for autocomplete, any string accepted at runtime. */
-export const knownString = <Known extends string>() =>
-  Schema.declare<Known | (string & {})>((value): value is Known | (string & {}) => typeof value === "string", {
-    expected: "string",
-  })

 export const OPENAI_PROMPT_CACHE_KEY_MAX_LENGTH = 64

@@ -1,6 +1,5 @@
-import { Schema } from "effect"
+import { Option, Schema } from "effect"
 import { ReasoningEffort, ReasoningEfforts, type LLMRequest } from "../../schema/index.js"
-import { lenient } from "../shared.js"

 export { ReasoningEffort, ReasoningEfforts }

@@ -50,22 +49,21 @@ export const StreamOptions = Schema.Struct({
  includeObfuscation: Schema.optional(Schema.Boolean),
 })

-// Malformed options are dropped one at a time so a bad `topLogprobs` cannot discard `store` or `reasoningEffort`.
 export const Options = Schema.Struct({
-  store: lenient(Schema.Boolean),
-  metadata: lenient(Schema.Record(Schema.String, Schema.String)),
-  safetyIdentifier: lenient(Schema.String),
-  streamOptions: lenient(StreamOptions),
-  topLogprobs: lenient(Schema.Int.check(Schema.isBetween({ minimum: 0, maximum: 20 }))),
-  reasoningEffort: lenient(ReasoningEffort),
-  reasoningSummary: lenient(Schema.Literals(["auto", "concise", "detailed"])),
-  include: lenient(Schema.Array(ResponseIncludableSchema)),
-  textVerbosity: lenient(TextVerbositySchema),
-  serviceTier: lenient(ServiceTierSchema),
-  truncation: lenient(TruncationSchema),
-  allowedTools: lenient(AllowedTools),
-  maxToolCalls: lenient(Schema.Int),
-  parallelToolCalls: lenient(Schema.Boolean),
+  store: Schema.optional(Schema.Boolean),
+  metadata: Schema.optional(Schema.Record(Schema.String, Schema.String)),
+  safetyIdentifier: Schema.optional(Schema.String),
+  streamOptions: Schema.optional(StreamOptions),
+  topLogprobs: Schema.optional(Schema.Int.check(Schema.isBetween({ minimum: 0, maximum: 20 }))),
+  reasoningEffort: Schema.optional(ReasoningEffort),
+  reasoningSummary: Schema.optional(Schema.Literals(["auto", "concise", "detailed"])),
+  include: Schema.optional(Schema.Array(ResponseIncludableSchema)),
+  textVerbosity: Schema.optional(TextVerbositySchema),
+  serviceTier: Schema.optional(ServiceTierSchema),
+  truncation: Schema.optional(TruncationSchema),
+  allowedTools: Schema.optional(AllowedTools),
+  maxToolCalls: Schema.optional(Schema.Int),
+  parallelToolCalls: Schema.optional(Schema.Boolean),
 })
 export type Options = typeof Options.Type

@@ -73,10 +71,11 @@ export type Resolved = Omit<Options, "allowedTools"> & {
  readonly allowedTools?: AllowedTools & { readonly mode: NonNullable<AllowedTools["mode"]> }
 }

-const decodeOptions = Schema.decodeUnknownSync(Options)
+const decodeOptions = Schema.decodeUnknownOption(Options)

 export const resolve = (request: LLMRequest): Resolved => {
-  const input = decodeOptions(request.providerOptions ?? {})
+  const input = Option.getOrUndefined(decodeOptions(request.providerOptions))
+  if (!input) return {}
  return {
    ...input,
    include: input.include?.length ? input.include : undefined,
@@ -166,71 +166,7 @@ describe("Anthropic Messages route", () => {
        }),
      ).pipe(Effect.flip)

-      expect(error.reason._tag).toBe("InvalidRequest")
-      expect(error.message).toContain("budgetTokens")
-    }),
-  )
-
-  it.effect("lowers passthrough provider options and accepts either key spelling", () =>
-    Effect.gen(function* () {
-      const snake = yield* compileRequest(
-        LLMRequest.update(request, {
-          providerOptions: {
-            service_tier: "auto",
-            metadata: { user_id: "user_1" },
-            container: { id: "container_1" },
-            inference_geo: "us",
-            cache_control: { type: "ephemeral", ttl: "1h" },
-            output_config: { format: { type: "json_schema", schema: { type: "object" } } },
-          },
-        }),
-      )
-      const camel = yield* compileRequest(
-        LLMRequest.update(request, {
-          providerOptions: {
-            serviceTier: "standard_only",
-            container: "container_2",
-            inferenceGeo: "eu",
-            cacheControl: { type: "ephemeral" },
-            outputConfig: { effort: "low" },
-          },
-        }),
-      )
-
-      expect(snake.body).toMatchObject({
-        service_tier: "auto",
-        metadata: { user_id: "user_1" },
-        container: { id: "container_1" },
-        inference_geo: "us",
-        cache_control: { type: "ephemeral", ttl: "1h" },
-        output_config: { format: { type: "json_schema", schema: { type: "object" } } },
-      })
-      expect(camel.body).toMatchObject({
-        service_tier: "standard_only",
-        container: "container_2",
-        inference_geo: "eu",
-        cache_control: { type: "ephemeral" },
-        output_config: { effort: "low" },
-      })
-    }),
-  )
-
-  it.effect("ignores unknown provider options and rejects malformed known ones", () =>
-    Effect.gen(function* () {
-      const prepared = yield* compileRequest(LLMRequest.update(request, { providerOptions: { unknownOption: true } }))
-      const malformed = [
-        { service_tier: "fast" },
-        { metadata: { user_id: 42 } },
-        { cache_control: { type: "ephemeral", ttl: "2h" } },
-        { output_config: { format: { type: "text" } } },
-        { thinking: { type: "automatic" } },
-      ]
-      const errors = yield* Effect.forEach(malformed, (providerOptions) =>
-        compileRequest(LLMRequest.update(request, { providerOptions })).pipe(Effect.flip),
-      )
-
-      expect(prepared.body).not.toHaveProperty("unknownOption")
-      expect(errors.map((error) => error.reason._tag)).toEqual(malformed.map(() => "InvalidRequest"))
+      expect(error.message).toContain("Anthropic thinking provider option requires budgetTokens")
    }),
  )

@@ -248,21 +248,6 @@ describe("OpenAI Chat route", () => {
    }),
  )

-  it.effect("keeps valid Chat options when a sibling option is malformed", () =>
-    Effect.gen(function* () {
-      const prepared = yield* compileRequest(
-        LLM.request({
-          model: OpenAI.configure({ baseURL: "https://api.openai.test/v1/", apiKey: "test" }).chat("gpt-4o-mini"),
-          prompt: "think",
-          providerOptions: { store: true, reasoningEffort: "max", topLogprobs: 25 },
-        }),
-      )
-
-      expect(prepared.body.store).toBe(true)
-      expect(prepared.body.reasoning_effort).toBe("max")
-    }),
-  )
-
  it.effect("maps the request prompt cache key when the compatibility flag is set", () =>
    Effect.gen(function* () {
      const prepared = yield* compileRequest(
@@ -1945,30 +1945,6 @@ describe("OpenAI Responses route", () => {
    }),
  )

-  it.effect("drops a malformed provider option without discarding its siblings", () =>
-    Effect.gen(function* () {
-      const prepared = yield* compileRequest(
-        LLM.request({
-          model,
-          prompt: "hi",
-          providerOptions: {
-            topLogprobs: 25,
-            metadata: { tenant: 7 },
-            reasoningEffort: "high",
-            serviceTier: "priority",
-            maxToolCalls: 4,
-          },
-        }),
-      )
-
-      expect(prepared.body.top_logprobs).toBeUndefined()
-      expect(prepared.body.metadata).toBeUndefined()
-      expect(prepared.body.reasoning).toEqual({ effort: "high" })
-      expect(prepared.body.service_tier).toBe("priority")
-      expect(prepared.body.max_tool_calls).toBe(4)
-    }),
-  )
-
  it.effect("accepts the full ResponseIncludable union", () =>
    Effect.gen(function* () {
      const prepared = yield* compileRequest(
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/app",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "description": "",
  "type": "module",
  "exports": {
@@ -52,14 +52,14 @@ export function createComposerAttachments(
  // Uploads this composer started; they finish (or fail) even if the composer unmounts.
  const [pending, setPending] = createStore<{ ids: string[] }>({ ids: [] })

-  // Media the model reads natively travels inline with the prompt, so its bytes live in the draft
-  // store. Everything else, including text, reaches the model as a path on the server that its
-  // tools open; those bytes never enter the store, and never get base64-encoded into the request.
+  // A file the model reads natively travels inline with the prompt, so its bytes live in the draft
+  // store. Anything else reaches the model as a path on the server and never enters the store:
+  // hashing and copying a large archive through it is what used to freeze the window.
  const add = async (file: File, target = capture(), clipboard = false) => {
    if (!target) return false
    const mime = await attachmentMime(file)
    const destination = input.destination()
-    if (native(mime, destination.input) && file.size <= MAX_INLINE_BYTES) return addInline(file, mime, target, clipboard)
+    if (native(mime, destination.input)) return addInline(file, mime, target, clipboard)
    const sourcePath = input.getPathForFile?.(file) || undefined
    if (destination.local && sourcePath) return addPath(target, { filename: file.name, mime, path: sourcePath })
    void stage(file, mime, target, destination)
@@ -213,11 +213,9 @@ export function createComposerAttachments(

 const imageMimes = new Set(["image/png", "image/jpeg", "image/gif", "image/webp"])

-// The server rejects inline attachments above this size, so larger media takes the path route.
-const MAX_INLINE_BYTES = 20 * 1024 * 1024
-
-// Mirrors the media the server forwards to the model as message content.
+// Mirrors the attachment kinds the server forwards to the model as message content.
 function native(mime: string, input: AttachmentDestination["input"]) {
+  if (mime === "text/plain") return true
  if (imageMimes.has(mime)) return input.image
  if (mime === "application/pdf") return input.pdf
  return false
@@ -240,8 +238,8 @@ const textMimes = new Set([
  "application/yaml",
 ])

-// Text-like files normalize to text/plain so the chip labels them as text; every other file keeps
-// a binary type. Delivery is decided separately: native media inline, everything else by path.
+// Text-like files normalize to text/plain so the server inlines their content; every other
+// file keeps a binary type and is delivered to the model by path or as native media.
 async function attachmentMime(file: File) {
  const type = file.type.split(";", 1)[0]?.trim().toLowerCase() ?? ""
  if (imageMimes.has(type) || type === "application/pdf") return type
@@ -1,10 +1,9 @@
-import { createEffect, createMemo, createResource, createSignal, For, onCleanup, onMount, Show, type JSX } from "solid-js"
+import { createEffect, createMemo, createSignal, For, onCleanup, onMount, Show, type JSX } from "solid-js"
 import { createStore } from "solid-js/store"
 import { FileIcon } from "@opencode/ui/file-icon"
 import { Icon } from "@opencode/ui/icon"
 import { IconButton } from "@opencode/ui/icon-button"
 import { createAnimatedPresence } from "@/runtime/animated-presence"
-import { resolveBlobUrl } from "@/runtime/persistence/drafts"
 import { ProviderIcon } from "@opencode/ui/provider-icon"
 import { useI18n } from "@opencode/ui/context/i18n"
 import { Button } from "@opencode/ui/button"
@@ -546,21 +545,17 @@ export function ComposerAttachments(props: {
                      </AttachmentCard>
                    }
                  >
-                    {(image) => {
-                      // Restored drafts and history carry image ids only; bytes load when shown.
-                      const [url] = createResource(() => image().blob, resolveBlobUrl)
-                      return (
-                        <>
-                          <img
-                            src={url() ?? ""}
-                            alt={attachment.filename}
-                            class="w-[58px] h-[46px] rounded-[6px] object-cover"
-                            onClick={() => props.onAttachmentClick?.(attachment)}
-                          />
-                          <div class="absolute inset-0 rounded-[6px] shadow-[inset_0_0_0_0.5px_var(--v2-border-border-base)] pointer-events-none" />
-                        </>
-                      )
-                    }}
+                    {(image) => (
+                      <>
+                    <img
+                      src={image().blob.url}
+                      alt={attachment.filename}
+                      class="w-[58px] h-[46px] rounded-[6px] object-cover"
+                      onClick={() => props.onAttachmentClick?.(attachment)}
+                    />
+                    <div class="absolute inset-0 rounded-[6px] shadow-[inset_0_0_0_0.5px_var(--v2-border-border-base)] pointer-events-none" />
+                      </>
+                    )}
                  </Show>
                </Tooltip>
                <button
@@ -11,7 +11,6 @@ import { useLanguage } from "@/runtime/i18n/language"
 import { useLayout } from "@/shell/state/layout"
 import { usePlatform } from "@/runtime/platform/platform"
 import { useWorkspaceLocation } from "@/workspaces/location"
-import { resolveBlobUrl } from "@/runtime/persistence/drafts"
 import { useData, useServer } from "@/runtime/server/current"
 import { createSessionTabs } from "@/session/helpers"
 import { showToast } from "@/shell/notifications/toast"
@@ -323,9 +322,7 @@ export function createComposerModel(adapter: ComposerAdapter, options?: { queue?
    },
    openAttachment: (attachment) => {
      if (attachment.type !== "image") return
-      void resolveBlobUrl(attachment.blob).then((src) => {
-        if (src) dialog.show(() => createComponent(ImagePreview, { src, alt: attachment.filename }))
-      })
+      dialog.show(() => createComponent(ImagePreview, { src: attachment.blob.url, alt: attachment.filename }))
    },
    openContext(key) {
      const item = controller.contextItem(key)
@@ -136,7 +136,7 @@ describe("composer persistence schemas", () => {
    ).toEqual(value)
  })

-  test("migrates inline images, keeps store references without a URL, and never encodes dataUrl", () => {
+  test("migrates inline images but never encodes dataUrl or unresolved references", () => {
    const value = Schema.decodeUnknownSync(
      Persistence.withInitial(ComposerStore, { prompt: DEFAULT_PROMPT, context: { items: [] } }),
    )({
@@ -149,16 +149,12 @@ describe("composer persistence schemas", () => {
        { ...image, blob: { id: "missing" }, dataUrl: "data:image/png;base64,YQ==" },
      ],
    })
-    expect(value.prompt).toHaveLength(6)
+    expect(value.prompt).toHaveLength(3)
    expect(value.prompt[0]).toEqual({
      ...image,
      sourcePath: "/image.png",
      blob: { id: "data:image/png;base64,YQ==", url: "data:image/png;base64,YQ==" },
    })
-    // Bytes still in the draft store resolve on use; a non-blob URL is discarded in favour of the id.
-    expect(value.prompt[3]).toEqual({ ...image, blob: { id: "missing", url: "" } })
-    expect(value.prompt[4]).toEqual({ ...image, blob: { id: "bad", url: "" } })
-    expect(value.prompt[5]).toEqual({ ...image, blob: { id: "missing", url: "" } })
    const encoded = Schema.encodeSync(ComposerStore)(value)
    expect(JSON.stringify(encoded)).not.toContain("dataUrl")
    expect(
@@ -61,12 +61,11 @@ const ImageFields = {
 }
 const Image = Persistence.struct({
  ...ImageFields,
-  // An empty URL is an image whose bytes are still in the draft store; see `resolveBlobUrl`.
-  blob: Schema.Struct({ id: Schema.NonEmptyString, url: Schema.String.check(Schema.isPattern(/^(blob:|data:|$)/)) }),
+  blob: Schema.Struct({ id: Schema.NonEmptyString, url: Schema.String.check(Schema.isPattern(/^(blob:|data:)/)) }),
 })

-// Draft storage keeps content-addressed blobs in the store until an image is shown or sent; a
-// reference without a URL resolves through `resolveBlobUrl`. Legacy inline data remains usable.
+// Draft storage hydrates content-addressed blobs before this codec runs. Legacy
+// inline data remains usable, but unresolved references are not renderable.
 export const ImageAttachmentPart = Schema.Struct({
  ...ImageFields,
  blob: Persistence.optional(
@@ -88,15 +88,6 @@ describe("prompt state initialization", () => {
          start: 5,
          end: 12,
        },
-        // A reference without a usable URL keeps its id; the bytes resolve from the draft store on use.
-        {
-          type: "image",
-          id: "missing-blob",
-          filename: "missing.png",
-          mime: "image/png",
-          blob: { id: "content-hash-without-a-url", url: "" },
-        },
-        { type: "image", id: "invalid-url", filename: "invalid.png", mime: "image/png", blob: { id: "hash", url: "" } },
        {
          type: "image",
          id: "legacy",
@@ -8,7 +8,7 @@ import type { ComposerAdapter, ComposerDelivery, ComposerSelection, ComposerSess
 import { createComposerSubmission } from "./submission-state"
 import { buildPromptRequest } from "./request"
 import { setCursorPosition } from "./editor/dom"
-import { blobDataUrl, resolveBlobUrl } from "@/runtime/persistence/drafts"
+import { blobDataUrl } from "@/runtime/persistence/drafts"
 import { isAttachment } from "./prompt-parts"
 import type { ModelSelection } from "@/providers/models/selection"

@@ -59,22 +59,12 @@ export function createComposerSubmit(input: ComposerSubmitInput) {
        selection: item.selection ? { ...item.selection } : undefined,
      })),
    })
-    const read = readSubmission(input, submission.prompt, submission.context, options?.alternate ?? false)
-    if (!read) {
+    const value = readSubmission(input, submission.prompt, submission.context, options?.alternate ?? false)
+    if (!value) {
      if (input.adapter.working() && input.adapter.kind === "active-session") void input.adapter.interrupt()
      return
    }
    if (submitting.has(input.adapter.state)) return
-    // Images restored from a draft or history carry ids only; the optimistic message shows their URLs.
-    const value = {
-      ...read,
-      images: await Promise.all(
-        read.images.map(async (image) => ({
-          ...image,
-          blob: { ...image.blob, url: (await resolveBlobUrl(image.blob)) ?? image.blob.url },
-        })),
-      ),
-    }
    submitting.add(input.adapter.state)
    const comments = input.comments.capture()
    // Capture command intent before starting a session in a worktree whose catalog has not loaded.
@@ -1,5 +1,5 @@
 import { describe, expect, test } from "bun:test"
-import { createDraftStore, draftTextChunk, draftTextThreshold, resolveBlobUrl } from "./drafts"
+import { createDraftStore, draftTextChunk, draftTextThreshold } from "./drafts"

 function memoryDriver() {
  const documents = new Map<string, string>()
@@ -287,34 +287,15 @@ describe("draft store image retention", () => {
    expect(await released(store, 5, shared.url)).toBe(true)
  })

-  test("loading a document pins the images it references without fetching their bytes", async () => {
+  test("loading a document pins the images it references", async () => {
    const { memory, store } = fresh()
-    const reads: string[] = []
-    const getBlob = memory.driver.getBlob
-    memory.driver.getBlob = (id) => {
-      reads.push(id)
-      return getBlob(id)
-    }
    const id = await memory.driver.putBlob(image(6))
    memory.documents.set("loaded", JSON.stringify({ prompt: [{ type: "image", blob: { id } }] }))
-    const loaded = JSON.parse((await store.getItem("loaded"))!).prompt[0].blob
-    expect(loaded).toEqual({ id })
-    expect(reads).toEqual([])
-    // The first consumer that shows or sends the image loads it; the pin from the load keeps it.
-    const url = (await resolveBlobUrl(loaded))!
-    expect(url.startsWith("blob:")).toBe(true)
-    expect(reads).toEqual([id])
-    expect(await resolveBlobUrl(loaded)).toBe(url)
-    expect(reads).toEqual([id])
+    const url = JSON.parse((await store.getItem("loaded"))!).prompt[0].blob.url
    await tick()
    expect(await released(store, 6, url)).toBe(false)
    await store.removeItem("loaded")
    await tick()
    expect(await released(store, 6, url)).toBe(true)
  })
-
-  test("a reference to bytes the store no longer holds resolves to nothing", async () => {
-    fresh()
-    expect(await resolveBlobUrl({ id: "gone" })).toBeUndefined()
-  })
 })
@@ -42,18 +42,6 @@ const refs = new Map<string, Set<string>>()
 // Image ids that were restored under a different id (a store without WebCrypto assigns fresh
 // ones); live references still carry the original.
 const aliases = new Map<string, string>()
-// Fetches image bytes from the store created last. Documents load without their bytes; a consumer
-// that renders or sends an image resolves its URL through here, so a history full of large
-// attachments costs nothing at startup.
-let loader: ((id: string) => Promise<string | undefined>) | undefined
-
-/** The object URL for an image reference, loading its bytes from the draft store on first use. */
-export function resolveBlobUrl(blob: { id: string; url?: string }) {
-  if (blob.url) return Promise.resolve(blob.url)
-  const existing = retained.get(aliases.get(blob.id) ?? blob.id)
-  if (existing) return Promise.resolve(existing.url)
-  return loader?.(blob.id) ?? Promise.resolve(undefined)
-}

 function blobUrl(id: string, blob: Blob, grace?: number) {
  const existing = retained.get(id)
@@ -132,7 +120,7 @@ export function createDraftStore(driver: Driver, options: { grace?: number } = {
  const loading = new Map<string, Promise<string | undefined>>()
  const loadBlobUrl = (id: string) => {
    const existing = retained.get(id)
-    if (existing) return Promise.resolve(existing.url)
+    if (existing) return existing.url
    const pending = loading.get(id)
    if (pending) return pending
    const next = driver
@@ -142,7 +130,6 @@ export function createDraftStore(driver: Driver, options: { grace?: number } = {
    loading.set(id, next)
    return next
  }
-  loader = loadBlobUrl
  const putBlob = async (blob: Blob) => {
    const id = await driver.putBlob(blob)
    return { id, url: blobUrl(id, blob, grace) }
@@ -234,11 +221,9 @@ export function createDraftStore(driver: Driver, options: { grace?: number } = {
      if (ref.kind === "text" && Array.isArray(ref.ids)) {
        return (await Promise.all(ref.ids.map((id) => loadChunk(String(id))))).join("")
      }
-      // Bytes stay in the store until something renders or sends the image (see resolveBlobUrl);
-      // only an image already pinned in this page gets its URL back immediately.
      if (typeof ref.id === "string") {
-        const url = retained.get(aliases.get(ref.id) ?? ref.id)?.url
-        return { ...item, blob: url ? { id: ref.id, url } : { id: ref.id } }
+        const url = await loadBlobUrl(ref.id)
+        if (url) return { ...item, blob: { id: ref.id, url } }
      }
    }
    return Object.fromEntries(
@@ -438,9 +423,7 @@ function referenced(json: string) {

 export async function blobDataUrl(blob: BlobReference, mime: string) {
  const kept = retained.get(aliases.get(blob.id) ?? blob.id)
-  const url = kept ? undefined : await resolveBlobUrl(blob)
-  if (!kept && !url) throw new Error(`Attachment ${blob.id} has no stored bytes`)
-  const data = kept ? kept.blob : await fetch(url!).then((response) => response.blob())
+  const data = kept ? kept.blob : await fetch(blob.url).then((response) => response.blob())
  return new Promise<string>((resolve, reject) => {
    const reader = new FileReader()
    reader.addEventListener("error", () => reject(reader.error))
@@ -1,23 +0,0 @@
-import { createResource } from "solid-js"
-import { usePlatform } from "@/runtime/platform/platform"
-
-export function createCameraAvailability() {
-  const platform = usePlatform()
-  const supported = platform.platform === "web" && window.isSecureContext && !!navigator.mediaDevices?.getUserMedia
-  const [available, actions] = createResource(
-    async () => {
-      if (!supported || !navigator.mediaDevices.enumerateDevices) return false
-      const denied = await navigator.permissions?.query({ name: "camera" }).then(
-        (permission) => permission.state === "denied",
-        () => false,
-      )
-      if (denied) return false
-      return navigator.mediaDevices.enumerateDevices().then(
-        (devices) => devices.some((device) => device.kind === "videoinput"),
-        () => false,
-      )
-    },
-    { initialValue: false },
-  )
-  return { supported, available, refetch: actions.refetch }
-}
@@ -4,17 +4,7 @@ import { Divider } from "@opencode/ui/divider"
 import { TextInput } from "@opencode/ui/text-input"
 import { useDialog } from "@opencode/ui/context/dialog"
 import { useMutation } from "@tanstack/solid-query"
-import {
-  type Component,
-  Show,
-  Suspense,
-  createEffect,
-  createMemo,
-  createSignal,
-  lazy,
-  onCleanup,
-  onMount,
-} from "solid-js"
+import { type Component, Show, createEffect, createMemo, createSignal, onCleanup, onMount } from "solid-js"
 import { createStore } from "solid-js/store"
 import {
  createServerHealthPreview,
@@ -28,12 +18,8 @@ import { useTabs } from "@/shell/tabs/tabs"
 import { useCheckServerHealth } from "@/runtime/server/health"
 import { usePlatform } from "@/runtime/platform/platform"
 import { isMixedContent } from "./browser"
-import { createCameraAvailability } from "./camera"
-import { decodePairingCode } from "./pairing"
 import "@/settings/settings.css"

-const PairingScanner = lazy(() => import("./scanner").then((module) => ({ default: module.PairingScanner })))
-
 type FormMode = "list" | "add" | "edit"

 export const DialogServer: Component<{
@@ -43,8 +29,6 @@ export const DialogServer: Component<{
 }> = (props) => {
  const dialog = useDialog()
  const language = useLanguage()
-  const platform = usePlatform()
-  const camera = createCameraAvailability()
  const form = createFormController({
    onSelect: (server) => {
      props.onSave?.(server)
@@ -91,112 +75,64 @@ export const DialogServer: Component<{
      </DialogHeader>
      <Divider />
      <DialogBody class="flex w-full min-w-0 flex-1 flex-col px-4 pt-4 pb-2">
-        <Show
-          when={!form.state.scanning()}
-          fallback={
-            <Suspense fallback={<p role="status">{language.t("server.connect.camera.starting")}</p>}>
-              <PairingScanner
-                onCancel={() => {
-                  form.scan.stop()
-                  void camera.refetch()
-                }}
-                onScan={form.scan.complete}
-              />
-            </Suspense>
-          }
-        >
-          <div class="flex w-full min-w-0 flex-col gap-6">
-            <div class="flex w-full min-w-0 flex-col gap-2">
-              <label class="settings-server-dialog-label">{language.t("dialog.server.add.url")}</label>
-              <TextInput
-                type="text"
-                appearance="large"
-                class="!w-full self-stretch"
-                value={form.state.value()}
-                placeholder={language.t("dialog.server.add.placeholder")}
-                invalid={!!form.state.error()}
-                disabled={form.state.busy()}
-                autofocus
-                list="dialog-server-addresses"
-                aria-describedby={form.state.error() ? "dialog-server-error" : undefined}
-                onInput={(event) => form.change.value(event.currentTarget.value)}
-                onKeyDown={keyDown}
-              />
-              <datalist id="dialog-server-addresses">
-                {form.state.urls().map((url) => (
-                  <option value={url} />
-                ))}
-              </datalist>
-              <Show when={form.state.error()}>
-                <span id="dialog-server-error" class="settings-server-dialog-error" role="alert">
-                  {form.state.error()}
-                </span>
-              </Show>
-            </div>
-            <div class="flex w-full min-w-0 flex-col gap-2">
-              <label class="settings-server-dialog-label">{language.t("dialog.server.add.name")}</label>
-              <TextInput
-                type="text"
-                appearance="large"
-                class="!w-full self-stretch"
-                value={form.state.name()}
-                placeholder={language.t("dialog.server.add.namePlaceholder")}
-                disabled={form.state.busy()}
-                onInput={(event) => form.change.name(event.currentTarget.value)}
-                onKeyDown={keyDown}
-              />
-            </div>
-            <div class="flex w-full min-w-0 flex-col gap-2">
-              <label class="settings-server-dialog-label">{language.t("dialog.server.add.password")}</label>
-              <TextInput
-                type="password"
-                appearance="large"
-                class="!w-full self-stretch"
-                value={form.state.password()}
-                placeholder={language.t("dialog.server.add.passwordPlaceholder")}
-                disabled={form.state.busy()}
-                onInput={(event) => form.change.password(event.currentTarget.value)}
-                onKeyDown={keyDown}
-              />
-            </div>
-            <Show when={props.mode === "add" && platform.platform === "web"}>
-              <div class="flex w-full min-w-0 flex-col gap-2">
-                <Button
-                  variant="neutral"
-                  size="large"
-                  class="!w-full self-stretch"
-                  disabled={form.state.busy() || !camera.available.latest}
-                  aria-describedby={
-                    !camera.available.latest && !camera.available.loading
-                      ? "dialog-server-camera-unavailable"
-                      : undefined
-                  }
-                  onClick={form.scan.start}
-                >
-                  {language.t("server.connect.scan")}
-                </Button>
-                <Show when={!camera.available.latest && !camera.available.loading}>
-                  <span id="dialog-server-camera-unavailable" class="settings-server-dialog-hint">
-                    {language.t(
-                      window.isSecureContext ? "server.connect.camera.unavailable" : "server.connect.camera.insecure",
-                    )}
-                  </span>
-                </Show>
-              </div>
+        <div class="flex w-full min-w-0 flex-col gap-6">
+          <div class="flex w-full min-w-0 flex-col gap-2">
+            <label class="settings-server-dialog-label">{language.t("dialog.server.add.url")}</label>
+            <TextInput
+              type="text"
+              appearance="large"
+              class="!w-full self-stretch"
+              value={form.state.value()}
+              placeholder={language.t("dialog.server.add.placeholder")}
+              invalid={!!form.state.error()}
+              disabled={form.state.busy()}
+              autofocus
+              aria-describedby={form.state.error() ? "dialog-server-error" : undefined}
+              onInput={(event) => form.change.value(event.currentTarget.value)}
+              onKeyDown={keyDown}
+            />
+            <Show when={form.state.error()}>
+              <span id="dialog-server-error" class="settings-server-dialog-error" role="alert">
+                {form.state.error()}
+              </span>
            </Show>
          </div>
-        </Show>
+          <div class="flex w-full min-w-0 flex-col gap-2">
+            <label class="settings-server-dialog-label">{language.t("dialog.server.add.name")}</label>
+            <TextInput
+              type="text"
+              appearance="large"
+              class="!w-full self-stretch"
+              value={form.state.name()}
+              placeholder={language.t("dialog.server.add.namePlaceholder")}
+              disabled={form.state.busy()}
+              onInput={(event) => form.change.name(event.currentTarget.value)}
+              onKeyDown={keyDown}
+            />
+          </div>
+          <div class="flex w-full min-w-0 flex-col gap-2">
+            <label class="settings-server-dialog-label">{language.t("dialog.server.add.password")}</label>
+            <TextInput
+              type="password"
+              appearance="large"
+              class="!w-full self-stretch"
+              value={form.state.password()}
+              placeholder={language.t("dialog.server.add.passwordPlaceholder")}
+              disabled={form.state.busy()}
+              onInput={(event) => form.change.password(event.currentTarget.value)}
+              onKeyDown={keyDown}
+            />
+          </div>
+        </div>
      </DialogBody>
-      <Show when={!form.state.scanning()}>
-        <DialogFooter>
-          <Button variant="neutral" disabled={form.state.busy()} onClick={() => dialog.close()}>
-            {language.t("common.cancel")}
-          </Button>
-          <Button variant="contrast" disabled={form.state.busy()} onClick={form.submit}>
-            {submitLabel()}
-          </Button>
-        </DialogFooter>
-      </Show>
+      <DialogFooter>
+        <Button variant="neutral" disabled={form.state.busy()} onClick={() => dialog.close()}>
+          {language.t("common.cancel")}
+        </Button>
+        <Button variant="contrast" disabled={form.state.busy()} onClick={form.submit}>
+          {submitLabel()}
+        </Button>
+      </DialogFooter>
    </Dialog>
  )
 }
@@ -213,8 +149,6 @@ function createFormController(options: { onSelect?: (server: ServerConnection.Ht
    mode: "list" as FormMode,
    originalUrl: undefined as string | undefined,
    values: { url: "", name: "", password: "" },
-    urls: [] as string[],
-    scanning: false,
    error: "",
    status: undefined as boolean | undefined,
  })
@@ -227,8 +161,6 @@ function createFormController(options: { onSelect?: (server: ServerConnection.Ht
      mode: "list",
      originalUrl: undefined,
      values: { url: "", name: "", password: "" },
-      urls: [],
-      scanning: false,
      error: "",
      status: undefined,
    })
@@ -333,16 +265,6 @@ function createFormController(options: { onSelect?: (server: ServerConnection.Ht
    setStore("error", "")
    request.mutate()
  }
-  const pair = (pairing: NonNullable<ReturnType<typeof decodePairingCode>>) => {
-    healthPreview.cancel()
-    setStore({
-      values: { ...store.values, url: pairing.urls[0], password: pairing.password },
-      urls: pairing.urls,
-      scanning: false,
-      error: "",
-    })
-    request.mutate()
-  }

  createEffect(() => {
    if (store.mode !== "edit") return
@@ -359,8 +281,6 @@ function createFormController(options: { onSelect?: (server: ServerConnection.Ht
      value: () => store.values.url,
      name: () => store.values.name,
      password: () => store.values.password,
-      urls: () => store.urls,
-      scanning: () => store.scanning,
      error: () => store.error,
      status: () => store.status,
    },
@@ -369,11 +289,6 @@ function createFormController(options: { onSelect?: (server: ServerConnection.Ht
      name: (value: string) => change("name", value),
      password: (value: string) => change("password", value),
    },
-    scan: {
-      start: () => setStore("scanning", true),
-      stop: () => setStore("scanning", false),
-      complete: pair,
-    },
    start: { add: startAdd, edit: startEdit },
    reset,
    submit,
@@ -1,41 +0,0 @@
-.server-connect-scanner {
-  display: flex;
-  flex-direction: column;
-  gap: 20px;
-
-  p {
-    font-size: 13px;
-    line-height: var(--line-height-base);
-    color: var(--v2-text-text-muted);
-  }
-
-  button {
-    min-height: 44px;
-    width: 100%;
-  }
-
-  .server-connect-error {
-    color: var(--v2-state-fg-danger);
-  }
-
-  .server-connect-video {
-    position: relative;
-    aspect-ratio: 1;
-    overflow: hidden;
-    border-radius: 12px;
-    background: var(--v2-background-bg-deep);
-  }
-
-  video {
-    width: 100%;
-    height: 100%;
-    object-fit: cover;
-  }
-
-  .server-connect-video [role="status"] {
-    position: absolute;
-    inset: 0;
-    display: grid;
-    place-items: center;
-  }
-}
@@ -4,7 +4,6 @@ import { createStore } from "solid-js/store"
 import { Button } from "@opencode/ui/button"
 import { useLanguage } from "@/runtime/i18n/language"
 import { decodePairingCode } from "./pairing"
-import "./scanner.css"

 export function PairingScanner(props: {
  onScan: (value: NonNullable<ReturnType<typeof decodePairingCode>>) => void
@@ -41,7 +41,8 @@
    color: var(--v2-text-text-muted);
  }

-  form {
+  form,
+  .server-connect-scanner {
    display: flex;
    flex-direction: column;
    gap: 20px;
@@ -94,4 +95,25 @@
    background: var(--v2-background-bg-layer-01);
    user-select: all;
  }
+
+  .server-connect-video {
+    position: relative;
+    aspect-ratio: 1;
+    overflow: hidden;
+    border-radius: 12px;
+    background: var(--v2-background-bg-deep);
+  }
+
+  video {
+    width: 100%;
+    height: 100%;
+    object-fit: cover;
+  }
+
+  .server-connect-video [role="status"] {
+    position: absolute;
+    inset: 0;
+    display: grid;
+    place-items: center;
+  }
 }
@@ -1,4 +1,4 @@
-import { lazy, Show, Suspense } from "solid-js"
+import { createResource, lazy, Show, Suspense } from "solid-js"
 import { createStore } from "solid-js/store"
 import { useMutation } from "@tanstack/solid-query"
 import { Button } from "@opencode/ui/button"
@@ -10,7 +10,6 @@ import { useCheckServerHealth } from "@/runtime/server/health"
 import { useServers } from "@/runtime/server/registry"
 import { serverAddress } from "./pairing"
 import { isMixedContent } from "./browser"
-import { createCameraAvailability } from "./camera"
 import "./screen.css"

 const PairingScanner = lazy(() => import("./scanner").then((module) => ({ default: module.PairingScanner })))
@@ -20,7 +19,23 @@ export function ConnectServerScreen() {
  const platform = usePlatform()
  const servers = useServers()
  const check = useCheckServerHealth()
-  const camera = createCameraAvailability()
+  const cameraSupported =
+    platform.platform === "web" && window.isSecureContext && !!navigator.mediaDevices?.getUserMedia
+  const [camera, cameraActions] = createResource(
+    async () => {
+      if (!cameraSupported || !navigator.mediaDevices.enumerateDevices) return false
+      const denied = await navigator.permissions?.query({ name: "camera" }).then(
+        (permission) => permission.state === "denied",
+        () => false,
+      )
+      if (denied) return false
+      return navigator.mediaDevices.enumerateDevices().then(
+        (devices) => devices.some((device) => device.kind === "videoinput"),
+        () => false,
+      )
+    },
+    { initialValue: false },
+  )
  const [state, setState] = createStore({ url: "", password: "", urls: [] as string[], error: "", scanning: false })
  const connectionError = () =>
    language.t(
@@ -63,7 +78,7 @@ export function ConnectServerScreen() {
              <PairingScanner
                onCancel={() => {
                  setState("scanning", false)
-                  void camera.refetch()
+                  void cameraActions.refetch()
                }}
                onScan={(pairing) => {
                  setState({
@@ -139,15 +154,13 @@ export function ConnectServerScreen() {
            <Button
              variant="neutral"
              size="large"
-              disabled={request.isPending || !camera.available.latest}
-              aria-describedby={
-                !camera.available.latest && !camera.available.loading ? "server-connect-camera-unavailable" : undefined
-              }
+              disabled={request.isPending || !camera.latest}
+              aria-describedby={!camera.latest && !camera.loading ? "server-connect-camera-unavailable" : undefined}
              onClick={() => setState("scanning", true)}
            >
              {language.t("server.connect.scan")}
            </Button>
-            <Show when={!camera.available.latest && !camera.available.loading}>
+            <Show when={!camera.latest && !camera.loading}>
              <p id="server-connect-camera-unavailable">
                {language.t(
                  window.isSecureContext ? "server.connect.camera.unavailable" : "server.connect.camera.insecure",
@@ -1517,12 +1517,6 @@
  color: var(--v2-state-fg-danger);
 }

-.settings-server-dialog-hint {
-  font-size: 13px;
-  line-height: var(--line-height-base);
-  color: var(--v2-text-text-muted);
-}
-
 .settings-extensions-tabs[data-component="tabs-v2"][data-variant="pill"] > [data-slot="tabs-v2-list"] {
  width: min(280px, 100%);
 }
@@ -1,6 +1,6 @@
 import { expect, test } from "bun:test"
 import { resolveObjectURL } from "node:buffer"
-import { createDraftStore, resolveBlobUrl } from "@/runtime/persistence/drafts"
+import { createDraftStore } from "@/runtime/persistence/drafts"

 function fixture(id: string, getBlob: () => Promise<Blob | null>) {
  const documents = new Map([
@@ -20,19 +20,7 @@ function fixture(id: string, getBlob: () => Promise<Blob | null>) {
  return { store, documents }
 }

-test("loading history and a draft reads no image bytes", async () => {
-  let reads = 0
-  const { store } = fixture("history-cache-lazy", async () => {
-    reads++
-    return new Blob(["shared screenshot"])
-  })
-  const [history, draft] = await Promise.all([store.getItem("history"), store.getItem("draft")])
-  expect(JSON.parse(history!).entries[0].prompt[0].blob).toEqual({ id: "history-cache-lazy" })
-  expect(JSON.parse(draft!).prompt[0].blob).toEqual({ id: "history-cache-lazy" })
-  expect(reads).toBe(0)
-})
-
-test("deduplicates concurrent resolves without invalidating either live reference", async () => {
+test("deduplicates concurrent history and draft reads without invalidating either live reference", async () => {
  const pending = Promise.withResolvers<Blob | null>()
  const started = Promise.withResolvers<void>()
  let reads = 0
@@ -41,33 +29,55 @@ test("deduplicates concurrent resolves without invalidating either live referenc
    started.resolve()
    return pending.promise
  })
-  await store.getItem("history")
-  const first = resolveBlobUrl({ id: "history-cache-concurrent" })
-  const second = resolveBlobUrl({ id: "history-cache-concurrent" })
+  const history = store.getItem("history")
+  const draft = store.getItem("draft")
  await started.promise
  pending.resolve(new Blob(["shared screenshot"]))
-  const [a, b] = await Promise.all([first, second])
-  expect(a).toBe(b!)
+  const [saved, active] = await Promise.all([history, draft])
+  const reference = JSON.parse(saved!).entries[0].prompt[0].blob
+  expect(JSON.parse(active!).prompt[0].blob).toEqual(reference)
  expect(reads).toBe(1)
  await store.removeItem("history")
-  expect(await resolveObjectURL(a!)?.text()).toBe("shared screenshot")
-  expect(await resolveBlobUrl({ id: "history-cache-concurrent" })).toBe(a!)
+  expect(await resolveObjectURL(reference.url)?.text()).toBe("shared screenshot")
+  expect(JSON.parse((await store.getItem("draft"))!).prompt[0].blob).toEqual(reference)
  expect(reads).toBe(1)
 })

-test("a document re-read while its image is live gets the URL back without a read", async () => {
+test("hydrates repeated references once within one history document", async () => {
+  let reads = 0
+  const { store, documents } = fixture("history-cache-repeated", async () => {
+    reads++
+    return new Blob(["repeated screenshot"])
+  })
+  documents.set(
+    "history",
+    JSON.stringify({
+      entries: Array.from({ length: 100 }, () => ({
+        prompt: [{ type: "image", blob: { id: "history-cache-repeated" } }],
+      })),
+    }),
+  )
+  const value = JSON.parse((await store.getItem("history"))!)
+  expect(value.entries).toHaveLength(100)
+  expect(
+    new Set(value.entries.map((entry: { prompt: { blob: { url: string } }[] }) => entry.prompt[0].blob.url)).size,
+  ).toBe(1)
+  expect(reads).toBe(1)
+})
+
+test("reuses a live URL on remount but reads the latest document", async () => {
  let reads = 0
  const { store, documents } = fixture("history-cache-remount", async () => {
    reads++
    return new Blob(["saved screenshot"])
  })
-  const url = await resolveBlobUrl({ id: "history-cache-remount" })
+  const first = JSON.parse((await store.getItem("history"))!)
  const changed = JSON.parse(documents.get("history")!)
  changed.entries[0].prompt.unshift({ type: "text", content: "new admission" })
  documents.set("history", JSON.stringify(changed))
  const second = JSON.parse((await store.getItem("history"))!)
  expect(second.entries[0].prompt[0].content).toBe("new admission")
-  expect(second.entries[0].prompt[1].blob).toEqual({ id: "history-cache-remount", url })
+  expect(second.entries[0].prompt[1].blob).toEqual(first.entries[0].prompt[0].blob)
  expect(reads).toBe(1)
 })

@@ -79,34 +89,33 @@ test("reuses a just-stored attachment without a round trip", async () => {
  })
  const reference = await store.putBlob(new Blob(["pending admission"]))
  expect(JSON.parse((await store.getItem("draft"))!).prompt[0].blob).toEqual(reference)
-  expect(await resolveBlobUrl({ id: reference.id })).toBe(reference.url)
  expect(reads).toBe(0)
  expect(await resolveObjectURL(reference.url)?.text()).toBe("pending admission")
 })

 test("does not retain a missing blob result", async () => {
  let reads = 0
-  fixture("history-cache-missing", async () => (++reads === 1 ? null : new Blob(["arrived"])))
-  expect(await resolveBlobUrl({ id: "history-cache-missing" })).toBeUndefined()
-  expect(await resolveBlobUrl({ id: "history-cache-missing" })).toStartWith("blob:")
+  const { store } = fixture("history-cache-missing", async () => (++reads === 1 ? null : new Blob(["arrived"])))
+  expect(JSON.parse((await store.getItem("draft"))!).prompt[0].blob.url).toBeUndefined()
+  expect(JSON.parse((await store.getItem("draft"))!).prompt[0].blob.url).toStartWith("blob:")
  expect(reads).toBe(2)
 })

 test("retries after a failed blob read", async () => {
  let reads = 0
-  fixture("history-cache-failure", async () => {
+  const { store } = fixture("history-cache-failure", async () => {
    if (++reads === 1) throw new Error("temporary storage failure")
    return new Blob(["recovered"])
  })
-  await expect(resolveBlobUrl({ id: "history-cache-failure" })).rejects.toThrow("temporary storage failure")
-  expect(await resolveBlobUrl({ id: "history-cache-failure" })).toStartWith("blob:")
+  await expect(store.getItem("history")).rejects.toThrow("temporary storage failure")
+  expect(JSON.parse((await store.getItem("history"))!).entries[0].prompt[0].blob.url).toStartWith("blob:")
  expect(reads).toBe(2)
 })

 test("keeps different blob IDs independent", async () => {
  const reads: string[] = []
-  createDraftStore({
-    get: async () => null,
+  const store = createDraftStore({
+    get: async () => JSON.stringify(["history-cache-first", "history-cache-second"].map((id) => ({ blob: { id } }))),
    set: async () => [],
    remove: async () => {},
    putBlob: async () => "unused",
@@ -115,8 +124,10 @@ test("keeps different blob IDs independent", async () => {
      return new Blob([id])
    },
  })
-  const urls = await Promise.all(["history-cache-first", "history-cache-second"].map((id) => resolveBlobUrl({ id })))
-  expect(urls[0]).not.toBe(urls[1])
-  expect(await Promise.all(urls.map((url) => resolveObjectURL(url!)?.text()))).toEqual(reads)
+  const value = JSON.parse((await store.getItem("history"))!)
+  expect(value[0].blob.url).not.toBe(value[1].blob.url)
+  expect(
+    await Promise.all(value.map((item: { blob: { url: string } }) => resolveObjectURL(item.blob.url)?.text())),
+  ).toEqual(reads)
  expect(reads).toEqual(["history-cache-first", "history-cache-second"])
 })
@@ -5,7 +5,7 @@ import { Schema } from "effect"
 import type { Platform } from "@/runtime/platform/platform"
 import { createComposerReady, createComposerState } from "@/composer/state"
 import { ServerScope } from "@/runtime/server/scope"
-import { createDraftStore, resolveBlobUrl } from "@/runtime/persistence/drafts"
+import { createDraftStore } from "@/runtime/persistence/drafts"
 import { flushPersisted } from "@/runtime/persistence/persist"
 import { Persist, persisted } from "@/runtime/persistence/storage"

@@ -103,11 +103,15 @@ describe("prompt persistence", () => {
      }),
    }))
    await root.session.ready.promise
-    // Bytes stay in the store until the image is shown or sent.
    expect(root.session.current()).toEqual([
-      { type: "image", id: "image", filename: "image.png", mime: "image/png", blob: { id: "composer-image", url: "" } },
+      {
+        type: "image",
+        id: "image",
+        filename: "image.png",
+        mime: "image/png",
+        blob: { id: "composer-image", url: expect.stringMatching(/^blob:/) },
+      },
    ])
-    expect(await resolveBlobUrl(root.session.current()[0]!.blob)).toStartWith("blob:")
    root.session.set([{ type: "text", content: "hello", start: 0, end: 5 }, ...root.session.current()])
    flushPersisted()
    await Bun.sleep(0)
@@ -233,7 +237,7 @@ describe("prompt persistence", () => {
  })
 })

-test("moves image data URLs into blobs and resolves object URLs on demand", async () => {
+test("moves image data URLs into blobs and hydrates object URLs", async () => {
  const documents = new Map<string, string>()
  const blobs = new Map<string, Blob>()
  const store = createDraftStore({
@@ -254,8 +258,8 @@ test("moves image data URLs into blobs and resolves object URLs on demand", asyn
  await store.setItem("prompt", JSON.stringify({ prompt: [{ type: "image", dataUrl: "data:image/png;base64,YQ==" }] }))
  expect(documents.get("prompt")).not.toContain("dataUrl")
  const value = JSON.parse((await store.getItem("prompt"))!)
-  expect(value.prompt[0].blob).toEqual({ id: "1" })
-  expect(await resolveBlobUrl(value.prompt[0].blob)).toStartWith("blob:")
+  expect(value.prompt[0].blob.id).toBe("1")
+  expect(value.prompt[0].blob.url).toStartWith("blob:")
 })

 test("does not let delayed blob migration overwrite a newer draft", async () => {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/cli",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "bin": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/client",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -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 and supported JavaScript built-ins. APIs
-  such as `fetch`, timers, `process`, filesystem access, imports, and modules are unavailable.
+- **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.
 - **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`
@@ -94,11 +94,19 @@ 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.

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

 ### OpenAPI tools

@@ -29,7 +29,7 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
      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, and Uint8Array values inside CodeMode.
+- [x] Live Date, RegExp, Map, Set, URL, URLSearchParams, Headers, 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.
@@ -47,8 +47,8 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
 ## 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, custom synchronous
-      iterators, and synchronous generators.
+- [x] Array literals, including holes and spread from arrays, strings, Maps, Sets, URLSearchParams, Headers, 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.
@@ -95,8 +95,8 @@ 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, custom synchronous iterators, and confined
-      synchronous generators. Abrupt completion invokes the iterator's optional `return()`.
+- [x] `for...of` over arrays, strings, Maps, Sets, URLSearchParams, Headers, 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`.
@@ -127,7 +127,7 @@ ultimate source of truth. Upstream test262 files run verbatim from `test/test262
      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`, `Promise`) throw a `TypeError`,
+      and new-requiring constructors (`Map`, `Set`, `URL`, `URLSearchParams`, `Headers`, `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.
@@ -179,10 +179,10 @@ 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, 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
+- [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.
 - [x] Arithmetic operators: `+`, `-`, `*`, `/`, `%`, and `**`.
 - [x] Equality and ordering: `==`, `!=`, `===`, `!==`, `<`, `<=`, `>`, and `>=`.
@@ -451,7 +451,13 @@ 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.
- [ ] `crypto.subtle`, `Blob`, and `TextDecoder` streaming or non-UTF-8 encodings.
+- [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`, and `entries`;
+      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.

 ## Extensions

@@ -461,8 +467,8 @@ 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`, `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),
+      `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 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
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/codemode",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "description": "Effect-native confined code execution over schema-described tools",
  "type": "module",
  "license": "MIT",
@@ -17,6 +17,7 @@ import {
  record,
  SetObj,
  URLSearchParamsObj,
+  HeadersObj,
 } from "./interpreter/objects.js"
 import { typeofValue } from "./interpreter/references.js"

@@ -69,6 +70,7 @@ 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)
@@ -27,6 +27,7 @@ import {
  SetObj,
  URLObj,
  URLSearchParamsObj,
+  HeadersObj,
 } from "./objects.js"
 import { describeValue } from "./references.js"

@@ -52,6 +53,7 @@ export const extensionGlobals = <R>(
    if (value instanceof RegExpObj) return new RegExp(value.regex.source, value.regex.flags)
    if (value instanceof URLObj) return new URL(value.url.href)
    if (value instanceof URLSearchParamsObj) return new URLSearchParams(value.params)
+    if (value instanceof HeadersObj) return new Headers(value.headers)
    const next = (item: unknown) => toHost(item, label, depth + 1, seen)
    if (value instanceof MapObj) return new Map([...value.map].map(([key, item]) => [next(key), next(item)]))
    if (value instanceof SetObj) return new Set([...value.set].map(next))
@@ -125,6 +127,7 @@ export const extensionGlobals = <R>(
      if (value instanceof URLSearchParams) {
        return new URLSearchParamsObj(builtins.URLSearchParams, new URLSearchParams(value))
      }
+      if (value instanceof Headers) return new HeadersObj(builtins.Headers, new Headers(value))
      if (value instanceof Map) {
        const wrapped = new MapObj(builtins.Map)
        for (const [key, item] of value) wrapped.map.set(next(key, label), next(item, label))
@@ -11,6 +11,7 @@ import { objectGlobal } from "../stdlib/object.js"
 import { regexpGlobal } from "../stdlib/regexp.js"
 import { stringGlobal } from "../stdlib/string.js"
 import { uriGlobal, urlGlobal, urlSearchParamsGlobal } from "../stdlib/url.js"
+import { headersGlobal } from "../stdlib/headers.js"
 import { coercion } from "../stdlib/value.js"
 import { base64Global, cryptoGlobal } from "../stdlib/web.js"
 import { ToolReference } from "../tool-runtime.js"
@@ -80,6 +81,7 @@ const table: Record<string, Factory> = {
  Set: (ctx) => setGlobal(ctx),
  URL: (ctx) => urlGlobal(ctx),
  URLSearchParams: (ctx) => urlSearchParamsGlobal(ctx),
+  Headers: (ctx) => headersGlobal(ctx),
  Uint8Array: (ctx) => uint8ArrayGlobal(ctx),
  TextEncoder: (ctx) => textEncoderGlobal(ctx),
  TextDecoder: (ctx) => textDecoderGlobal(ctx),
@@ -84,6 +84,7 @@ import {
  PromiseObj,
  SetObj,
  URLSearchParamsObj,
+  HeadersObj,
  record,
  remove,
  set,
@@ -653,7 +654,7 @@ class Frame<R> {
      const cursor = iterator === undefined ? yield* self.iterate(right, node) : undefined
      if (iterator === undefined && cursor === undefined) {
        throw invalidData(
-          `${awaiting ? "for await...of" : "for...of"} requires an array, string, Map, Set, or URLSearchParams, or custom iterator value.`,
+          `${awaiting ? "for await...of" : "for...of"} requires an array, string, Map, Set, URLSearchParams, or Headers, or custom iterator value.`,
          node,
        )
      }
@@ -756,9 +757,11 @@ class Frame<R> {
              ? value.set.values()
              : value instanceof URLSearchParamsObj
                ? value.params.entries()
-                : value instanceof Bytes
-                  ? value.bytes.values()
-                  : undefined
+                : value instanceof HeadersObj
+                  ? value.headers.entries()
+                  : value instanceof Bytes
+                    ? value.bytes.values()
+                    : undefined
    if (iterator !== undefined) {
      const proto = this.ctx.builtins.Array
      return Effect.succeed({
@@ -1848,6 +1851,7 @@ class Frame<R> {
        value instanceof MapObj ||
        value instanceof SetObj ||
        value instanceof URLSearchParamsObj ||
+        value instanceof HeadersObj ||
        value instanceof Bytes
      ) {
        const cursor = yield* self.iterate(value, node)
@@ -29,6 +29,7 @@ const builtins = [
  "Set",
  "URL",
  "URLSearchParams",
+  "Headers",
  "Uint8Array",
  "TextEncoder",
  "TextDecoder",
@@ -80,6 +81,7 @@ export const createBuiltins = (): Builtins => {
    Set: plain(),
    URL: plain(),
    URLSearchParams: plain(),
+    Headers: plain(),
    Uint8Array: plain(),
    TextEncoder: plain(),
    TextDecoder: plain(),
@@ -156,6 +156,15 @@ export class URLSearchParamsObj extends Obj {
  }
 }

+export class HeadersObj extends Obj {
+  constructor(
+    proto: Obj,
+    readonly headers: Headers,
+  ) {
+    super(proto)
+  }
+}
+
 export class URLObj extends Obj {
  readonly searchParams: URLSearchParamsObj
  constructor(
@@ -181,13 +190,14 @@ export class Bytes extends Obj {
 /** Built-in objects that wrap a host value; data-like, but never plain data. */
 export const isWrapper = (
  value: unknown,
-): value is DateObj | RegExpObj | MapObj | SetObj | URLObj | URLSearchParamsObj | Bytes =>
+): value is DateObj | RegExpObj | MapObj | SetObj | URLObj | URLSearchParamsObj | HeadersObj | Bytes =>
  value instanceof DateObj ||
  value instanceof RegExpObj ||
  value instanceof MapObj ||
  value instanceof SetObj ||
  value instanceof URLObj ||
  value instanceof URLSearchParamsObj ||
+  value instanceof HeadersObj ||
  value instanceof Bytes

 const MAX_ARRAY_INDEX = 4_294_967_295
@@ -16,6 +16,7 @@ import {
  SetObj,
  URLObj,
  URLSearchParamsObj,
+  HeadersObj,
 } from "./objects.js"

 /** Values that cannot cross the data boundary. */
@@ -85,6 +86,7 @@ export const describeValue = (value: unknown): string => {
  if (value instanceof SetObj) return "a Set"
  if (value instanceof URLObj) return "a URL"
  if (value instanceof URLSearchParamsObj) return "a URLSearchParams"
+  if (value instanceof HeadersObj) return "a Headers"
  if (value instanceof Bytes) return "a Uint8Array"
  if (value instanceof GeneratorObj) return "a generator"
  if (isRuntimeReference(value)) return "a function"
@@ -12,6 +12,7 @@ import {
  SetObj,
  URLObj,
  URLSearchParamsObj,
+  HeadersObj,
 } from "../interpreter/objects.js"
 import { containsOpaqueReference, isRuntimeReference } from "../interpreter/references.js"
 import type { Interpreter } from "../interpreter/interpreter.js"
@@ -66,6 +67,7 @@ const formatConsoleValue = (value: unknown, seen: Set<object>, depth: number): s
  if (value instanceof RegExpObj) return coerceToString(value)
  if (value instanceof URLObj) return coerceToString(value)
  if (value instanceof URLSearchParamsObj) return coerceToString(value)
+  if (value instanceof HeadersObj) return `Headers ${JSON.stringify(Object.fromEntries(value.headers))}`
  if (value instanceof Bytes) return `Uint8Array(${value.bytes.length}) [${value.bytes.join(",")}]`
  if (depth > MAX_CONSOLE_DEPTH) return "..."
  if (seen.has(value)) return "[Circular]"
@@ -0,0 +1,119 @@
+import { Effect } from "effect"
+import { constructor, methods, prototypeFrom, receiver, requiresNew } from "../interpreter/native.js"
+import { typeError } from "../interpreter/model.js"
+import { entries, Arr, HeadersObj, Obj } from "../interpreter/objects.js"
+import { applyCollectionCallback } from "../interpreter/callback.js"
+import { isRuntimeReference } from "../interpreter/references.js"
+import type { Interpreter } from "../interpreter/interpreter.js"
+import { coerceToString } from "./value.js"
+import { readPairs } from "./url.js"
+
+// The host validates header names and values and throws its own TypeError; the program gets one of its own.
+const attempt = <T>(run: () => T): T => {
+  try {
+    return run()
+  } catch (error) {
+    throw typeError(error instanceof Error ? error.message : String(error))
+  }
+}
+
+const constructHeaders = <R>(ctx: Interpreter<R>, init: unknown, proto: Obj): Effect.Effect<HeadersObj, unknown, R> => {
+  const wrap = (headers: Headers) => new HeadersObj(proto, headers)
+  if (init === undefined) return Effect.succeed(wrap(new Headers()))
+  return Effect.gen(function* () {
+    const pairs = init instanceof Obj ? yield* readPairs(ctx, init, "new Headers(...)") : undefined
+    if (pairs !== undefined) return wrap(attempt(() => new Headers(pairs)))
+    if (!(init instanceof Obj) || isRuntimeReference(init)) {
+      throw typeError("new Headers(...) expects a record of names to values, iterable [name, value] pairs, or Headers.")
+    }
+    return wrap(
+      attempt(() => new Headers(Object.fromEntries(entries(init).map(([key, value]) => [key, coerceToString(value)])))),
+    )
+  })
+}
+
+export const headersGlobal = <R>(ctx: Interpreter<R>) => {
+  const builtins = ctx.builtins
+  const proto = builtins.Headers
+  const headers = constructor<R>(builtins, proto, {
+    name: "Headers",
+    call: requiresNew("Headers"),
+    construct: (args, newTarget) => constructHeaders(ctx, args[0], prototypeFrom(newTarget, proto)),
+  })
+  const self = (thisValue: unknown, name: string) => receiver(HeadersObj, thisValue, `Headers.prototype.${name}`)
+  const wrap = (items: Array<unknown>) => new Arr(builtins.Array, items)
+  const arg = (args: Array<unknown>, index: number): string => coerceToString(args[index])
+  const requireArgs = (name: string, args: Array<unknown>, count: number): void => {
+    if (args.length < count) throw typeError(`Headers.${name} requires ${count} argument${count === 1 ? "" : "s"}.`)
+  }
+  methods(builtins, proto, [
+    [
+      "append",
+      2,
+      (thisValue, args) => {
+        requireArgs("append", args, 2)
+        const target = self(thisValue, "append").headers
+        return attempt(() => target.append(arg(args, 0), arg(args, 1)))
+      },
+    ],
+    [
+      "delete",
+      1,
+      (thisValue, args) => {
+        requireArgs("delete", args, 1)
+        const target = self(thisValue, "delete").headers
+        return attempt(() => target.delete(arg(args, 0)))
+      },
+    ],
+    [
+      "get",
+      1,
+      (thisValue, args) => {
+        requireArgs("get", args, 1)
+        const target = self(thisValue, "get").headers
+        return attempt(() => target.get(arg(args, 0)))
+      },
+    ],
+    ["getSetCookie", 0, (thisValue) => wrap(self(thisValue, "getSetCookie").headers.getSetCookie())],
+    [
+      "has",
+      1,
+      (thisValue, args) => {
+        requireArgs("has", args, 1)
+        const target = self(thisValue, "has").headers
+        return attempt(() => target.has(arg(args, 0)))
+      },
+    ],
+    [
+      "set",
+      2,
+      (thisValue, args) => {
+        requireArgs("set", args, 2)
+        const target = self(thisValue, "set").headers
+        return attempt(() => target.set(arg(args, 0), arg(args, 1)))
+      },
+    ],
+    ["keys", 0, (thisValue) => wrap(Array.from(self(thisValue, "keys").headers.keys()))],
+    ["values", 0, (thisValue) => wrap(Array.from(self(thisValue, "values").headers.values()))],
+    [
+      "entries",
+      0,
+      (thisValue) =>
+        wrap(Array.from(self(thisValue, "entries").headers.entries(), ([key, value]) => wrap([key, value]))),
+    ],
+    [
+      "forEach",
+      1,
+      (thisValue, args) => {
+        requireArgs("forEach", args, 1)
+        const target = self(thisValue, "forEach")
+        const apply = applyCollectionCallback(ctx, args[0], "Headers.forEach")
+        return Effect.gen(function* () {
+          for (const [key, value] of Array.from(target.headers.entries())) yield* apply([value, key, target])
+          return undefined
+        })
+      },
+    ],
+  ])
+  return headers
+}
@@ -107,12 +107,10 @@ export const urlGlobal = <R>(ctx: Interpreter<R>) => {
  return url
 }

-const readPair = <R>(ctx: Interpreter<R>, value: unknown): Effect.Effect<Array<string>, unknown, R> =>
+const readPair = <R>(ctx: Interpreter<R>, value: unknown, label: string): Effect.Effect<Array<string>, unknown, R> =>
  Effect.gen(function* () {
    const cursor = yield* ctx.iterate(value)
-    if (cursor === undefined) {
-      throw typeError("new URLSearchParams(...) expects iterable [name, value] pairs.")
-    }
+    if (cursor === undefined) throw typeError(`${label} expects iterable [name, value] pairs.`)
    const items: Array<string> = []
    while (true) {
      const step = yield* cursor.next
@@ -126,6 +124,29 @@ const readPair = <R>(ctx: Interpreter<R>, value: unknown): Effect.Effect<Array<s
    }
  })

+/**
+ * Reads a synchronous iterable of `[name, value]` pairs as strings; `undefined` when `init` is not iterable. As in
+ * WebIDL, the whole sequence is converted before any pair's length is checked.
+ */
+export const readPairs = <R>(
+  ctx: Interpreter<R>,
+  init: unknown,
+  label: string,
+): Effect.Effect<Array<[string, string]> | undefined, unknown, R> =>
+  Effect.gen(function* () {
+    const cursor = yield* ctx.iterate(init)
+    if (cursor === undefined) return undefined
+    const pairs: Array<Array<string>> = []
+    while (true) {
+      const step = yield* cursor.next
+      if (step.done) {
+        if (pairs.some((entry) => entry.length !== 2)) throw typeError(`${label} expects iterable [name, value] pairs.`)
+        return pairs as Array<[string, string]>
+      }
+      pairs.push(yield* preserveConsumerError(cursor, readPair(ctx, step.value, label)))
+    }
+  })
+
 const constructURLSearchParams = <R>(
  ctx: Interpreter<R>,
  init: unknown,
@@ -139,20 +160,8 @@ const constructURLSearchParams = <R>(
    return Effect.succeed(wrap(new URLSearchParams(coerceToString(init))))
  }
  return Effect.gen(function* () {
-    const cursor = yield* ctx.iterate(init)
-    if (cursor !== undefined) {
-      const pairs: Array<Array<string>> = []
-      while (true) {
-        const step = yield* cursor.next
-        if (step.done) {
-          if (pairs.some((entry) => entry.length !== 2)) {
-            throw typeError("new URLSearchParams(...) expects iterable [name, value] pairs.")
-          }
-          return wrap(new URLSearchParams(pairs.map((entry): [string, string] => [entry[0] ?? "", entry[1] ?? ""])))
-        }
-        pairs.push(yield* preserveConsumerError(cursor, readPair(ctx, step.value)))
-      }
-    }
+    const pairs = yield* readPairs(ctx, init, "new URLSearchParams(...)")
+    if (pairs !== undefined) return wrap(new URLSearchParams(pairs))
    if (isRuntimeReference(init)) {
      throw typeError("new URLSearchParams(...) expects a query string, data object, or synchronous iterable pairs.")
    }
@@ -13,6 +13,7 @@ import {
  SetObj,
  URLObj,
  URLSearchParamsObj,
+  HeadersObj,
 } from "../interpreter/objects.js"
 import type { Interpreter } from "../interpreter/interpreter.js"

@@ -28,6 +29,7 @@ export const coerceToString = (value: unknown): string => {
  if (value instanceof SetObj) return "[object Set]"
  if (value instanceof URLObj) return value.url.href
  if (value instanceof URLSearchParamsObj) return value.params.toString()
+  if (value instanceof HeadersObj) return "[object Headers]"
  if (value instanceof Bytes) return value.bytes.join(",")
  if (value instanceof ErrorObj) {
    // Match Error.prototype.toString: "name: message", or just one when the other is empty.
@@ -128,6 +128,34 @@ describe("values are converted at the boundary, never shared", () => {
    expect([...(held[0] as Set<{ z: number }>)][0]).toEqual({ z: 1 })
  })

+  test("Headers cross as copies in both directions", async () => {
+    const stored = new Headers({ "X-A": "1" })
+    const target = CodeMode.make({
+      extensions: [
+        Extension.make({
+          name: "http",
+          globals: {
+            headers: () => stored,
+            keep: (value: Headers) => {
+              held.push(value)
+              return value
+            },
+          },
+        }),
+      ],
+    })
+    held.length = 0
+    expect(
+      await value(
+        `const h = headers(); h.set("x-a", "2"); const back = keep(h); back.set("x-a", "3"); return [h instanceof Headers, h.get("x-a"), back === h, back.get("x-a"), [...back]]`,
+        target,
+      ),
+    ).toEqual([true, "2", false, "3", [["x-a", "3"]]])
+    expect(stored.get("x-a")).toBe("1")
+    expect(held[0]).toBeInstanceOf(Headers)
+    expect((held[0] as Headers).get("x-a")).toBe("2")
+  })
+
  test("bytes cross as copies in both directions; ArrayBuffer comes in as Uint8Array", async () => {
    const stored = new Uint8Array([1, 2, 3])
    const target = CodeMode.make({
@@ -635,6 +635,154 @@ describe("URL and URI helpers", () => {
  })
 })

+describe("Headers", () => {
+  test("constructs from records, pairs, Maps, and Headers; names fold to lowercase and values combine", async () => {
+    expect(
+      await value(`
+        const headers = new Headers({ "Content-Type": "text/plain", "X-Count": 1, "X-Null": null })
+        headers.append("Accept", "text/html")
+        headers.append("accept", "application/json")
+        headers.set("x-count", "2")
+        headers.delete("x-null")
+        const copy = new Headers(headers)
+        copy.set("content-type", "text/html")
+        return {
+          get: headers.get("content-type"),
+          missing: headers.get("x-missing"),
+          combined: headers.get("ACCEPT"),
+          has: [headers.has("Accept"), headers.has("x-null")],
+          count: headers.get("x-count"),
+          copied: [headers.get("content-type"), copy.get("content-type")],
+          pairs: [...new Headers([["b", "2"], ["A", "1"]])],
+          map: [...new Headers(new Map([["k", "v"]]))],
+          keys: headers.keys(),
+          values: headers.values(),
+          entries: headers.entries(),
+        }
+      `),
+    ).toEqual({
+      get: "text/plain",
+      missing: null,
+      combined: "text/html, application/json",
+      has: [true, false],
+      count: "2",
+      copied: ["text/plain", "text/html"],
+      pairs: [
+        ["a", "1"],
+        ["b", "2"],
+      ],
+      map: [["k", "v"]],
+      keys: ["accept", "content-type", "x-count"],
+      values: ["text/html, application/json", "text/plain", "2"],
+      entries: [
+        ["accept", "text/html, application/json"],
+        ["content-type", "text/plain"],
+        ["x-count", "2"],
+      ],
+    })
+  })
+
+  test("iterates in sorted order everywhere iteration is allowed, and getSetCookie keeps cookies apart", async () => {
+    expect(
+      await value(`
+        const headers = new Headers({ b: "2", a: "1" })
+        headers.append("Set-Cookie", "x=1")
+        headers.append("set-cookie", "y=2")
+        const seen = []
+        headers.forEach((value, name, self) => seen.push(name + "=" + value + ":" + (self === headers)))
+        const [first] = headers
+        function* pairs() { yield* headers }
+        return {
+          seen,
+          first,
+          spread: [...headers],
+          from: Array.from(headers).length,
+          generator: [...pairs()].length,
+          object: Object.fromEntries(headers),
+          cookies: headers.getSetCookie(),
+        }
+      `),
+    ).toEqual({
+      seen: ["a=1:true", "b=2:true", "set-cookie=x=1:true", "set-cookie=y=2:true"],
+      first: ["a", "1"],
+      spread: [
+        ["a", "1"],
+        ["b", "2"],
+        ["set-cookie", "x=1"],
+        ["set-cookie", "y=2"],
+      ],
+      from: 4,
+      generator: 4,
+      object: { a: "1", b: "2", "set-cookie": "y=2" },
+      cookies: ["x=1", "y=2"],
+    })
+  })
+
+  test("serializes as a name-to-value object at the boundary and in JSON; prints for console", async () => {
+    const result = await run(`
+      const headers = new Headers({ "X-A": "1", b: "2" })
+      console.log(headers)
+      return { headers, json: JSON.stringify({ headers }), text: String(headers), type: typeof headers, is: headers instanceof Headers }
+    `)
+    expect(result.ok && result.value).toEqual({
+      headers: { b: "2", "x-a": "1" },
+      json: '{"headers":{"b":"2","x-a":"1"}}',
+      text: "[object Headers]",
+      type: "object",
+      is: true,
+    })
+    expect(result.ok && result.logs?.[0]).toBe('Headers {"b":"2","x-a":"1"}')
+  })
+
+  test("rejects what it cannot build from, and invalid names and values, with TypeErrors the program can catch", async () => {
+    expect(
+      await value(`
+        function message(run) {
+          try { run(); return null } catch (error) { return error instanceof TypeError ? error.message : error }
+        }
+        const headers = new Headers()
+        return [
+          message(() => Headers()),
+          message(() => new Headers(null)),
+          message(() => new Headers(1)),
+          message(() => new Headers("a=1")),
+          message(() => new Headers(new Date())),
+          message(() => new Headers(() => 1)),
+          message(() => new Headers([["name"]])),
+          message(() => new Headers([["a", "b", "c"]])),
+          message(() => new Headers({ "bad name": "x" })),
+          message(() => new Headers({ name: "bad\u0000value" })),
+          message(() => headers.get("invalid\u0100")),
+          message(() => headers.has({})),
+          message(() => headers.set("a", "invalid\u0100")),
+          message(() => headers.append("a")),
+          message(() => headers.forEach()),
+          message(() => headers.forEach(1)),
+          message(() => { const get = headers.get; return get("a") }),
+        ]
+      `),
+    ).toEqual([
+      "Constructor Headers requires 'new'.",
+      "new Headers(...) expects a record of names to values, iterable [name, value] pairs, or Headers.",
+      "new Headers(...) expects a record of names to values, iterable [name, value] pairs, or Headers.",
+      "new Headers(...) expects a record of names to values, iterable [name, value] pairs, or Headers.",
+      "new Headers(...) expects a record of names to values, iterable [name, value] pairs, or Headers.",
+      "new Headers(...) expects a record of names to values, iterable [name, value] pairs, or Headers.",
+      "new Headers(...) expects iterable [name, value] pairs.",
+      "new Headers(...) expects iterable [name, value] pairs.",
+      expect.stringContaining("bad name"),
+      expect.stringContaining("invalid value"),
+      expect.stringContaining("Invalid header name"),
+      expect.stringContaining("[object Object]"),
+      expect.stringContaining("invalid value"),
+      "Headers.append requires 2 arguments.",
+      "Headers.forEach requires 1 argument.",
+      "Headers.forEach expects a function callback.",
+      "Headers.prototype.get called on incompatible receiver undefined.",
+    ])
+  })
+})
+
 describe("Map", () => {
  test("get/set/has/size with chaining", async () => {
    expect(
@@ -3,10 +3,13 @@
 * - html/webappapis/atob/base64.any.js (btoa reference encoder, input list, and atob WebIDL cases)
 * - fetch/data-urls/resources/base64.json (copied to fixtures/wpt-base64.json)
 * - WebCryptoAPI/randomUUID.https.any.js
+ * - fetch/api/headers/{headers-basic,headers-errors}.any.js
 *
 * Copyright © web-platform-tests contributors. Governed by the 3-Clause BSD license in LICENSE.wpt.
 *
 * `assert_throws_dom("InvalidCharacterError", …)` becomes a check for a TypeError: CodeMode has no DOMException.
+ * Headers cases that need `Symbol.iterator`, iterator objects from `keys()`/`values()`/`entries()` (CodeMode returns
+ * arrays), or a custom iterator on a Headers instance are left out.
 */
 import { describe, expect, test } from "bun:test"
 import { Effect } from "effect"
@@ -166,3 +169,225 @@ describe("crypto.randomUUID WPT parity (WebCryptoAPI/randomUUID.https.any.js)",
    ).toEqual([true, true, true, 768])
  })
 })
+
+// Enough of testharness.js to run the Headers files close to verbatim; each `test` records its failure, if any.
+const testharness = `
+  const failures = []
+  function test(run, name) { try { run() } catch (error) { failures.push(name + ": " + (error && error.message ? error.message : error)) } }
+  function assert_equals(actual, expected, message) { if (actual !== expected) throw new Error((message || "") + " expected " + JSON.stringify(expected) + " got " + JSON.stringify(actual)) }
+  function assert_true(actual, message) { assert_equals(actual, true, message) }
+  function assert_false(actual, message) { assert_equals(actual, false, message) }
+  function assert_array_equals(actual, expected, message) { assert_equals(JSON.stringify(actual), JSON.stringify(expected), message) }
+  function assert_throws_js(type, run) { try { run() } catch (error) { if (error instanceof type) return; throw new Error("threw " + error.name) } throw new Error("did not throw") }
+  function assert_unreached() { throw new Error("unreachable") }
+`
+
+describe("Headers WPT parity (fetch/api/headers)", () => {
+  test("headers-basic.any.js", async () => {
+    expect(
+      await value(`
+        ${testharness}
+        test(function() { new Headers() }, "Create headers from no parameter")
+        test(function() { new Headers(undefined) }, "Create headers from undefined parameter")
+        test(function() { new Headers({}) }, "Create headers from empty object")
+        var parameters = [null, 1]
+        parameters.forEach(function(parameter) {
+          test(function() { assert_throws_js(TypeError, function() { new Headers(parameter) }) }, "Create headers with " + parameter + " should throw")
+        })
+        var headerDict = {"name1": "value1", "name2": "value2", "name3": "value3", "name4": null, "name5": undefined, "name6": 1, "Content-Type": "value4"}
+        var headerSeq = []
+        for (var name in headerDict) headerSeq.push([name, headerDict[name]])
+        test(function() {
+          var headers = new Headers(headerSeq)
+          for (name in headerDict) assert_equals(headers.get(name), String(headerDict[name]), "name: " + name + " has value: " + headerDict[name])
+          assert_equals(headers.get("length"), null, "init should be treated as a sequence, not as a dictionary")
+        }, "Create headers with sequence")
+        test(function() {
+          var headers = new Headers(headerDict)
+          for (name in headerDict) assert_equals(headers.get(name), String(headerDict[name]), "name: " + name + " has value: " + headerDict[name])
+        }, "Create headers with record")
+        test(function() {
+          var headers = new Headers(headerDict)
+          var headers2 = new Headers(headers)
+          for (name in headerDict) assert_equals(headers2.get(name), String(headerDict[name]), "name: " + name + " has value: " + headerDict[name])
+        }, "Create headers with existing headers")
+        test(function() {
+          var headers = new Headers()
+          for (name in headerDict) {
+            headers.append(name, headerDict[name])
+            assert_equals(headers.get(name), String(headerDict[name]), "name: " + name + " has value: " + headerDict[name])
+          }
+        }, "Check append method")
+        test(function() {
+          var headers = new Headers()
+          for (name in headerDict) {
+            headers.set(name, headerDict[name])
+            assert_equals(headers.get(name), String(headerDict[name]), "name: " + name + " has value: " + headerDict[name])
+          }
+        }, "Check set method")
+        test(function() {
+          var headers = new Headers(headerDict)
+          for (name in headerDict) assert_true(headers.has(name), "headers has name " + name)
+          assert_false(headers.has("nameNotInHeaders"), "headers do not have header: nameNotInHeaders")
+        }, "Check has method")
+        test(function() {
+          var headers = new Headers(headerDict)
+          for (name in headerDict) {
+            assert_true(headers.has(name), "headers have a header: " + name)
+            headers.delete(name)
+            assert_true(!headers.has(name), "headers do not have anymore a header: " + name)
+          }
+        }, "Check delete method")
+        test(function() {
+          var headers = new Headers(headerDict)
+          for (name in headerDict) assert_equals(headers.get(name), String(headerDict[name]), "name: " + name + " has value: " + headerDict[name])
+          assert_equals(headers.get("nameNotInHeaders"), null, "header: nameNotInHeaders has no value")
+        }, "Check get method")
+        var headerEntriesDict = {"name1": "value1", "Name2": "value2", "name": "value3", "content-Type": "value4", "Content-Typ": "value5", "Content-Types": "value6"}
+        var sortedHeaderDict = {}
+        var headerValues = []
+        var sortedHeaderKeys = Object.keys(headerEntriesDict).map(function(value) {
+          sortedHeaderDict[value.toLowerCase()] = headerEntriesDict[value]
+          headerValues.push(headerEntriesDict[value])
+          return value.toLowerCase()
+        }).sort()
+        test(function() {
+          var headers = new Headers(headerEntriesDict)
+          assert_array_equals(headers.keys(), sortedHeaderKeys)
+          for (const key of headers.keys()) assert_true(sortedHeaderKeys.indexOf(key) != -1)
+        }, "Check keys method")
+        test(function() {
+          var headers = new Headers(headerEntriesDict)
+          assert_array_equals(headers.values(), sortedHeaderKeys.map((key) => sortedHeaderDict[key]))
+          for (const value of headers.values()) assert_true(headerValues.indexOf(value) != -1)
+        }, "Check values method")
+        test(function() {
+          var headers = new Headers(headerEntriesDict)
+          assert_array_equals(headers.entries(), sortedHeaderKeys.map((key) => [key, sortedHeaderDict[key]]))
+          for (const entry of headers.entries()) assert_equals(entry[1], sortedHeaderDict[entry[0]])
+        }, "Check entries method")
+        test(function() {
+          var headers = new Headers(headerEntriesDict)
+          assert_array_equals([...headers], sortedHeaderKeys.map((key) => [key, sortedHeaderDict[key]]))
+        }, "Check Symbol.iterator method")
+        test(function() {
+          var headers = new Headers(headerEntriesDict)
+          var index = 0
+          headers.forEach(function(value, key, container) {
+            assert_equals(headers, container)
+            assert_equals(key, sortedHeaderKeys[index])
+            assert_equals(value, sortedHeaderDict[sortedHeaderKeys[index]])
+            index++
+          })
+          assert_equals(index, sortedHeaderKeys.length)
+        }, "Check forEach method")
+        test(() => {
+          const headers = new Headers({"foo": "2", "baz": "1", "BAR": "0"})
+          const actualKeys = []
+          const actualValues = []
+          for (const [header, value] of headers) {
+            actualKeys.push(header)
+            actualValues.push(value)
+            headers.delete("foo")
+          }
+          assert_array_equals(actualKeys, ["bar", "baz"])
+          assert_array_equals(actualValues, ["0", "1"])
+        }, "Iteration skips elements removed while iterating")
+        test(() => {
+          const headers = new Headers({"foo": "2", "baz": "1", "BAR": "0", "quux": "3"})
+          const actualKeys = []
+          const actualValues = []
+          for (const [header, value] of headers) {
+            actualKeys.push(header)
+            actualValues.push(value)
+            if (header === "baz") headers.delete("bar")
+          }
+          assert_array_equals(actualKeys, ["bar", "baz", "quux"])
+          assert_array_equals(actualValues, ["0", "1", "3"])
+        }, "Removing elements already iterated over causes an element to be skipped during iteration")
+        test(() => {
+          const headers = new Headers({"foo": "2", "baz": "1", "BAR": "0", "quux": "3"})
+          const actualKeys = []
+          const actualValues = []
+          for (const [header, value] of headers) {
+            actualKeys.push(header)
+            actualValues.push(value)
+            if (header === "baz") headers.append("X-yZ", "4")
+          }
+          assert_array_equals(actualKeys, ["bar", "baz", "foo", "quux", "x-yz"])
+          assert_array_equals(actualValues, ["0", "1", "2", "3", "4"])
+        }, "Appending a value pair during iteration causes it to be reached during iteration")
+        test(() => {
+          const headers = new Headers({"foo": "2", "baz": "1", "BAR": "0", "quux": "3"})
+          const actualKeys = []
+          const actualValues = []
+          for (const [header, value] of headers) {
+            actualKeys.push(header)
+            actualValues.push(value)
+            if (header === "baz") headers.append("abc", "-1")
+          }
+          assert_array_equals(actualKeys, ["bar", "baz", "baz", "foo", "quux"])
+          assert_array_equals(actualValues, ["0", "1", "1", "2", "3"])
+        }, "Prepending a value pair before the current element position causes it to be skipped during iteration and adds the current element a second time")
+        return failures
+      `),
+    ).toEqual([])
+  })
+
+  test("headers-errors.any.js", async () => {
+    expect(
+      await value(`
+        ${testharness}
+        test(function() { assert_throws_js(TypeError, function() { new Headers([["name"]]) }) }, "Create headers giving an array having one string as init argument")
+        test(function() { assert_throws_js(TypeError, function() { new Headers([["invalid", "invalidValue1", "invalidValue2"]]) }) }, "Create headers giving an array having three strings as init argument")
+        test(function() { assert_throws_js(TypeError, function() { new Headers([["invalid\u0100", "Value1"]]) }) }, "Create headers giving bad header name as init argument")
+        test(function() { assert_throws_js(TypeError, function() { new Headers([["name", "invalidValue\u0100"]]) }) }, "Create headers giving bad header value as init argument")
+        var badNames = ["invalid\u0100", {}]
+        var badValues = ["invalid\u0100"]
+        badNames.forEach(function(name) {
+          test(function() { var headers = new Headers(); assert_throws_js(TypeError, function() { headers.get(name) }) }, "Check headers get with an invalid name " + name)
+        })
+        badNames.forEach(function(name) {
+          test(function() { var headers = new Headers(); assert_throws_js(TypeError, function() { headers.delete(name) }) }, "Check headers delete with an invalid name " + name)
+        })
+        badNames.forEach(function(name) {
+          test(function() { var headers = new Headers(); assert_throws_js(TypeError, function() { headers.has(name) }) }, "Check headers has with an invalid name " + name)
+        })
+        badNames.forEach(function(name) {
+          test(function() { var headers = new Headers(); assert_throws_js(TypeError, function() { headers.set(name, "Value1") }) }, "Check headers set with an invalid name " + name)
+        })
+        badValues.forEach(function(value) {
+          test(function() { var headers = new Headers(); assert_throws_js(TypeError, function() { headers.set("name", value) }) }, "Check headers set with an invalid value " + value)
+        })
+        badNames.forEach(function(name) {
+          test(function() { var headers = new Headers(); assert_throws_js(TypeError, function() { headers.append("invalid\u0100", "Value1") }) }, "Check headers append with an invalid name " + name)
+        })
+        badValues.forEach(function(value) {
+          test(function() { var headers = new Headers(); assert_throws_js(TypeError, function() { headers.append("name", value) }) }, "Check headers append with an invalid value " + value)
+        })
+        test(function() {
+          var headers = new Headers([["name", "value"]])
+          assert_throws_js(TypeError, function() { headers.forEach() })
+          assert_throws_js(TypeError, function() { headers.forEach(undefined) })
+          assert_throws_js(TypeError, function() { headers.forEach(1) })
+        }, "Headers forEach throws if argument is not callable")
+        test(function() {
+          var headers = new Headers([["name1", "value1"], ["name2", "value2"], ["name3", "value3"]])
+          var counter = 0
+          try {
+            headers.forEach(function(value, name) {
+              counter++
+              if (name == "name2") throw "error"
+            })
+          } catch (e) {
+            assert_equals(counter, 2)
+            assert_equals(e, "error")
+            return
+          }
+          assert_unreached()
+        }, "Headers forEach loop should stop if callback is throwing exception")
+        return failures
+      `),
+    ).toEqual([])
+  })
+})
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/console-app",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "scripts": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/console-core",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "license": "MIT",
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/console-function",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "$schema": "https://json.schemastore.org/package.json",
  "private": true,
  "type": "module",
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/console-mail",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "dependencies": {
    "@jsx-email/all": "2.2.3",
    "@jsx-email/cli": "1.4.3",
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/console-support",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "scripts": {
@@ -1,6 +1,6 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "name": "@opencode/core",
  "type": "module",
  "license": "MIT",
@@ -1,29 +0,0 @@
-export * as NativeCompactionPlugin from "./compaction.js"
-
-import { LLMClient, Message } from "@opencode/ai"
-import { define } from "@opencode/plugin/effect/plugin"
-import { Effect } from "effect"
-import { SessionCompaction } from "../session/compaction.js"
-import type { PluginInternal } from "./internal.js"
-
-export const Plugin = define({
-  id: "opencode.compaction.native",
-  effect: Effect.fn("NativeCompactionPlugin")(function* () {
-    const llm = yield* LLMClient.Service
-    const compaction = yield* SessionCompaction.Service
-    yield* compaction.transform((editor) => {
-      editor.native((input) => {
-        const request = input.request
-        if (LLMClient.canCompact(request, { mechanism: "trigger" }))
-          return Effect.gen(function* () {
-            const retained = yield* input.retained
-            const result = yield* llm.compact(request, { ...input.options, mechanism: "trigger" })
-            return { replacement: [...retained, Message.assistant(result.checkpoint)], usage: result.usage }
-          })
-        if (LLMClient.canCompact(request))
-          return llm.compact(request, { mechanism: "endpoint", http: input.options.http })
-        return undefined
-      })
-    })
-  }),
-} satisfies PluginInternal.InternalPlugin)
@@ -1,6 +1,5 @@
 export * as PluginInternal from "./internal.js"

-import { LLMClient } from "@opencode/ai"
 import type { Plugin } from "@opencode/plugin/effect/plugin"
 import { LayerNode } from "@opencode/util/effect/layer-node"
 import { httpClient } from "@opencode/util/effect/app-node-platform"
@@ -13,7 +12,6 @@ import { Provider } from "../provider.js"
 import { Command } from "../command.js"
 import { Config } from "../config.js"
 import { Credential } from "../credential.js"
-import { llmClient } from "../effect/app-node-platform.js"
 import { ConfigAgentPlugin } from "../config/plugin/agent.js"
 import { ConfigCommandPlugin } from "../config/plugin/command.js"
 import { ConfigCompactionPlugin } from "../config/plugin/compaction.js"
@@ -86,7 +84,6 @@ import { WriteTool } from "../tool/plugin/write.js"
 import { AgentPlugin } from "./agent.js"
 import BrowserPlugin from "@opencode/plugin-browser"
 import { CommandPlugin } from "./command.js"
-import { NativeCompactionPlugin } from "./compaction.js"
 import { IdentityPlugin } from "./identity.js"
 import { PlanPlugin } from "./plan.js"
 import { ModelsDevPlugin } from "./models-dev.js"
@@ -123,7 +120,6 @@ const services = [
  Integration.Service,
  Job.Service,
  KV.Service,
-  LLMClient.Service,
  Location.Service,
  ModelsDev.Service,
  Mcp.Service,
@@ -175,7 +171,6 @@ export const requirements = LayerNode.group([
  Integration.node,
  Job.node,
  KV.node,
-  llmClient,
  Location.node,
  ModelsDev.node,
  Mcp.node,
@@ -217,7 +212,6 @@ const pre = [
  SkillPlugin.Plugin,
  VcsHgPlugin.Plugin,
  ModelsDevPlugin,
-  NativeCompactionPlugin.Plugin,
  ...ProviderPlugins,
  ...WebSearchPlugins,
  PatchTool.Plugin,
@@ -10,9 +10,7 @@ import {
  LLMRequest,
  Message,
  type ContentPart,
-  type Usage,
 } from "@opencode/ai"
-import type { StreamOptions } from "@opencode/ai/route"
 import type { SessionCompactionResult } from "@opencode/plugin/effect/session"
 import { SessionError } from "@opencode/schema/session-error"
 import { Context, Effect, Layer, Stream } from "effect"
@@ -93,25 +91,8 @@ export type Settings = {
  tokens: number
 }

-export type NativeInput = {
-  readonly request: LLMRequest
-  readonly options: StreamOptions
-  /** Whole, real user messages within the retained-token allowance, for checkpoint-only mechanisms. */
-  readonly retained: Effect.Effect<ReadonlyArray<Message>>
-}
-
-export type NativeResult = {
-  readonly replacement: ReadonlyArray<Message>
-  readonly usage?: Usage
-}
-
-/** Returns the provider's replacement window, or `undefined` when this strategy has no mechanism for the route. */
-export type NativeStrategy = (input: NativeInput) => Effect.Effect<NativeResult, AIError> | undefined
-
 export type Editor = {
  configure: (settings: Partial<Settings>) => void
-  /** Later registrations take precedence. */
-  native: (strategy: NativeStrategy) => void
 }

 export type AutoInput = {
@@ -399,18 +380,15 @@ export const layer = Layer.effect(
    const llm = yield* LLMClient.Service
    const db = (yield* Database.Service).db

-    const state = State.create<Settings & { readonly native: NativeStrategy[] }, Editor>({
+    const state = State.create<Settings, Editor>({
      name: "session-compaction",
-      initial: () => ({ auto: true, buffer: DEFAULT_BUFFER, tokens: DEFAULT_KEEP_TOKENS, native: [] }),
+      initial: () => ({ auto: true, buffer: DEFAULT_BUFFER, tokens: DEFAULT_KEEP_TOKENS }),
      editor: (editor) => ({
        configure: (settings) => {
          if (settings.auto !== undefined) editor.auto = settings.auto
          if (settings.buffer !== undefined) editor.buffer = settings.buffer
          if (settings.tokens !== undefined) editor.tokens = settings.tokens
        },
-        native: (strategy) => {
-          editor.native.push(strategy)
-        },
      }),
    })
    const failed = Effect.fnUntraced(function* (input: SessionEvent.Compaction.Failed["data"]) {
@@ -526,23 +504,6 @@ export const layer = Layer.effect(
        return yield* reject(
          "Provider compaction requires the endpoint in provider/model settings, not a model.request rewrite",
        )
-      const native = state
-        .get()
-        .native.toReversed()
-        .map((strategy) =>
-          strategy({
-            request,
-            options: prepared.options,
-            retained: original(context.session.id).pipe(
-              Effect.map((messages) => retainUsers(messages, context.model, state.get().tokens)),
-            ),
-          }),
-        )
-        .find((effect) => effect !== undefined)
-      if (!native)
-        return yield* reject(
-          `No plugin provides native compaction for ${request.model.provider}/${request.model.route.id}`,
-        )
      const transient = SessionRunnerRetry.transient(yield* SessionRunnerRetry.policy(context.session.id), {
        agent: context.agent.id,
        model: context.model.ref,
@@ -553,7 +514,25 @@ export const layer = Layer.effect(
        Effect.gen(function* () {
          // Transient provider failures retry like any other request; only a known automatic overflow permits
          // local recovery, and nothing is installed until the provider returns a checkpoint.
-          const result = yield* restore(native.pipe(transient))
+          const result = yield* restore(
+            Effect.gen(function* () {
+              if (LLMClient.canCompact(request, { mechanism: "trigger" })) {
+                const retained = retainUsers(yield* original(context.session.id), context.model, state.get().tokens)
+                const result = yield* llm
+                  .compact(request, { ...prepared.options, mechanism: "trigger" })
+                  .pipe(transient)
+                return { replacement: [...retained, Message.assistant(result.checkpoint)], usage: result.usage }
+              }
+              if (LLMClient.canCompact(request))
+                return yield* llm
+                  .compact(request, { mechanism: "endpoint", http: prepared.options.http })
+                  .pipe(transient)
+              // Model resolution admits provider policies only for routes with a compaction operation.
+              return yield* Effect.die(
+                new Error(`${request.model.provider}/${request.model.route.id} has no compaction operation`),
+              )
+            }),
+          )
          const usage = result.usage ? SessionUsage.record(result.usage, context.model.cost) : undefined
          if (usage)
            yield* bus.publish(SessionEvent.UsageRecorded, {
@@ -93,10 +93,9 @@ export const prepare = Effect.fn("SessionPrompt.prepare")(function* (request: {
 const materializeAttachment = Effect.fn("SessionPrompt.materializeAttachment")(function* (
  input: PromptInput.FileAttachment,
 ) {
-  const label = attachmentLabel(input)
  const resolved = input.uri.startsWith("data:")
    ? {
-        bytes: yield* decodeDataURL(input.uri, label),
+        bytes: yield* decodeDataURL(input.uri),
        source: { type: "inline" as const },
        start: undefined,
        end: undefined,
@@ -106,8 +105,8 @@ const materializeAttachment = Effect.fn("SessionPrompt.materializeAttachment")(f
    : yield* readFileAttachment(input.uri)
  if (resolved.bytes.byteLength > MAX_ATTACHMENT_BYTES)
    return yield* new AttachmentError({
-      uri: label,
-      message: `Attachment exceeds the ${MAX_ATTACHMENT_BYTES} byte limit: ${label}`,
+      uri: input.uri,
+      message: `Attachment exceeds the ${MAX_ATTACHMENT_BYTES} byte limit: ${input.uri}`,
    })

  const mime = resolved.mime ?? Mime.detect(resolved.bytes)
@@ -139,7 +138,7 @@ const normalizeImageAttachment = Effect.fn("SessionPrompt.normalizeImageAttachme
 ) {
  if (!mime.startsWith("image/")) return { data: Base64.make(data), mime }
  const image = yield* Image.Service
-  const label = attachmentLabel(input)
+  const label = input.name ?? (input.uri.startsWith("data:") ? "inline attachment" : input.uri)
  const content = { uri: label, content: data, encoding: "base64" as const, mime }
  const normalized = yield* image.normalize(label, content).pipe(
    Effect.catchTag("Image.ResizerUnavailableError", () => Effect.succeed(content)),
@@ -202,12 +201,7 @@ const readFileAttachment = Effect.fn("SessionPrompt.readFileAttachment")(functio

 const MAX_ATTACHMENT_BYTES = 20 * 1024 * 1024

-// A data URL is the whole file; errors and logs must name the attachment, not echo its bytes.
-function attachmentLabel(input: PromptInput.FileAttachment) {
-  return input.name ?? (input.uri.startsWith("data:") ? "inline attachment" : input.uri)
-}
-
-function decodeDataURL(uri: string, label: string) {
+function decodeDataURL(uri: string) {
  return Effect.try({
    try: () => {
      const comma = uri.indexOf(",")
@@ -220,7 +214,7 @@ function decodeDataURL(uri: string, label: string) {
      if (bytes.toString("base64") !== payload) throw new Error("Non-canonical base64")
      return bytes
    },
-    catch: () => new AttachmentError({ uri: label, message: `Invalid attachment data URL: ${label}` }),
+    catch: () => new AttachmentError({ uri, message: "Invalid attachment data URL" }),
  })
 }

@@ -22,18 +22,16 @@ const writePackage = (dir: string, pkg: Record<string, unknown>) =>
 const npmLayer = (cache: string) =>
  AppNodeBuilder.build(Npm.node, [Global.node.replace(Global.layerWith({ cache, state: path.join(cache, "state") }))])

-async function createGitFixture(directory: string, prepare = false) {
+async function createGitFixture(directory: string) {
  const repository = path.join(directory, "repository")
  await fs.mkdir(path.join(repository, "dependency"), { recursive: true })
  await writePackage(repository, {
    name: "fixture-git-plugin",
    exports: "./index.js",
    dependencies: { "fixture-dependency": "file:./dependency" },
-    ...(prepare ? { scripts: { prepare: "bun prepare.ts" } } : {}),
  })
  await writePackage(path.join(repository, "dependency"), { name: "fixture-dependency", exports: "./index.js" })
  await Bun.write(path.join(repository, "index.js"), "export default { root: true }\n")
-  if (prepare) await Bun.write(path.join(repository, "prepare.ts"), 'await Bun.write("prepared.txt", "ready\\n")\n')
  await Bun.write(path.join(repository, "dependency", "index.js"), "export const dependency = true\n")

  const subdirectory = path.join(repository, "packages", "subdirectory-plugin")
@@ -250,19 +248,6 @@ describe("Npm.add", () => {
    expect(entries.added.directory).toContain("node_modules")
  })

-  test("installs Git packages with prepare scripts", async () => {
-    await using tmp = await tmpdir()
-    const fixture = await createGitFixture(tmp.path, true)
-    const spec = `git+file://${fixture.repository}#${fixture.commit}`
-
-    const entry = await Effect.gen(function* () {
-      const npm = yield* Npm.Service
-      return yield* npm.add(spec)
-    }).pipe(Effect.scoped, Effect.provide(npmLayer(path.join(tmp.path, "cache"))), Effect.runPromise)
-
-    await expect(Bun.file(path.join(entry.directory, "prepared.txt")).text()).resolves.toBe("ready\n")
-  })
-
  test("installs a Git package from an npm ::path: subdirectory", async () => {
    await using tmp = await tmpdir()
    const fixture = await createGitFixture(tmp.path)
@@ -1,5 +1,5 @@
 import { expect, test } from "bun:test"
-import { LLMClient, LanguageModel, Message, ToolDefinition, Usage } from "@opencode/ai"
+import { LLMClient, LanguageModel, Message, ToolDefinition } from "@opencode/ai"
 import { OpenAI } from "@opencode/ai/providers"
 import { Agent } from "@opencode/core/agent"
 import { Bus } from "@opencode/core/bus"
@@ -7,7 +7,6 @@ import { Database } from "@opencode/core/database/database"
 import { AppNodeBuilder } from "@opencode/core/effect/app-node-builder"
 import { llmClient } from "@opencode/core/effect/app-node-platform"
 import { Instructions } from "@opencode/core/instructions/index"
-import { NativeCompactionPlugin } from "@opencode/core/plugin/compaction"
 import { PluginHooks } from "@opencode/core/plugin/hooks"
 import { Project } from "@opencode/core/project"
 import { ProjectTable } from "@opencode/core/project/sql"
@@ -27,7 +26,6 @@ import { SessionStore } from "@opencode/core/session/store"
 import { LayerNode } from "@opencode/util/effect/layer-node"
 import { DateTime, Deferred, Effect, Fiber, Schema } from "effect"
 import { testEffect } from "./lib/effect"
-import { host } from "./plugin/host"

 const it = testEffect(
  AppNodeBuilder.build(
@@ -46,8 +44,7 @@ const it = testEffect(
  ),
 )

-const setup = Effect.fnUntraced(function* (options: { endpoint?: boolean; plugin?: boolean } = {}) {
-  const endpoint = options.endpoint ?? false
+const setup = Effect.fnUntraced(function* (endpoint = false) {
  const db = (yield* Database.Service).db
  const bus = yield* Bus.Service
  const inbox = yield* SessionInbox.Service
@@ -188,7 +185,6 @@ const setup = Effect.fnUntraced(function* (options: { endpoint?: boolean; plugin
    render: { initial: String, changed: (_previous, value) => value, removed: () => "removed" },
  })
  yield* InstructionState.prepare(db, bus, instructions, sessionID)
-  if (options.plugin !== false) yield* NativeCompactionPlugin.Plugin.effect(host())
  yield* hooks.register("session", "model.request", (event) =>
    Effect.sync(() => {
      event.headers["x-test-hook"] = event.kind
@@ -265,7 +261,6 @@ const setup = Effect.fnUntraced(function* (options: { endpoint?: boolean; plugin
    store,
    hooks,
    model,
-    compaction,
  }
 })

@@ -353,7 +348,7 @@ it.live(

 it.live("manual and automatic endpoint compaction keep the provider replacement unchanged", () =>
  Effect.gen(function* () {
-    const fixture = yield* setup({ endpoint: true })
+    const fixture = yield* setup(true)
    yield* fixture.prompt("Original user")
    expect(yield* fixture.compact).toEqual({ status: "completed" })
    expect(yield* fixture.automatic).toEqual({ status: "completed" })
@@ -450,31 +445,6 @@ it.live("rejects request-hook route rewrites before provider compaction", () =>
  }),
 )

-it.live("provider compaction fails without a native strategy and persists a registered strategy's window", () =>
-  Effect.gen(function* () {
-    const fixture = yield* setup({ plugin: false })
-    yield* fixture.prompt("Original user")
-    expect(yield* fixture.compact).toMatchObject({
-      status: "failed",
-      error: { type: "provider.unsupported-operation", message: expect.stringContaining("openai/openai-responses") },
-    })
-    yield* fixture.compaction.transform((editor) => {
-      editor.native(() =>
-        Effect.succeed({
-          replacement: [Message.assistant("plugin window")],
-          usage: new Usage({ nonCachedInputTokens: 20, outputTokens: 4 }),
-        }),
-      )
-    })
-    expect(yield* fixture.compact).toEqual({ status: "completed" })
-    expect(fixture.state.calls).toBe(0)
-    const installed = yield* fixture.checkpoint
-    expect(installed.provenance).toEqual(SessionProviderContext.provenance(fixture.model)!)
-    expect(SessionProviderContext.decode(installed)).toEqual([Message.assistant("plugin window")])
-    expect(yield* fixture.store.get(fixture.sessionID)).toMatchObject({ tokens: { input: 20, output: 4 } })
-  }),
-)
-
 test("retained user budget counts attachments and drops whole oldest messages", () => {
  const model = SessionRunnerModel.resolved(OpenAI.responses("gpt-5.4-mini"), {
    capabilities: { tools: true, input: ["text", "image"], output: ["text"] },
@@ -501,31 +501,8 @@ describe("Session.prompt", () => {

      expect(error).toMatchObject({
        _tag: "Session.AttachmentError",
-        uri: "image.png",
-        message: "Invalid attachment data URL: image.png",
-      })
-    }),
-  )
-
-  it.effect("rejects oversized inline attachments without echoing their bytes", () =>
-    Effect.gen(function* () {
-      yield* setup
-      const session = yield* Session.Service
-      const uri = `data:application/octet-stream;base64,${Buffer.alloc(20 * 1024 * 1024 + 1).toString("base64")}`
-
-      const error = yield* session
-        .prompt({
-          sessionID,
-          text: "Inspect this",
-          files: [{ uri }],
-          resume: false,
-        })
-        .pipe(Effect.flip)
-
-      expect(error).toMatchObject({
-        _tag: "Session.AttachmentError",
-        uri: "inline attachment",
-        message: "Attachment exceeds the 20971520 byte limit: inline attachment",
+        uri,
+        message: "Invalid attachment data URL",
      })
    }),
  )
@@ -56,7 +56,6 @@ import { Plugin } from "@opencode/core/plugin"
 import { PluginHooks } from "@opencode/core/plugin/hooks"
 import { OptimizePlugin } from "@opencode/core/plugin/optimize"
 import { IdentityPlugin } from "@opencode/core/plugin/identity"
-import { NativeCompactionPlugin } from "@opencode/core/plugin/compaction"
 import { QuestionTool } from "@opencode/core/tool/plugin/question"
 import { Agent } from "@opencode/core/agent"
 import { Config } from "@opencode/core/config"
@@ -471,7 +470,6 @@ const layer = Layer.unwrap(
        Config.node,
        Snapshot.node,
        SessionCompaction.node,
-        LayerNodePlatform.llmClient,
        SessionRunnerLLM.node,
        SessionExecution.node,
        Session.node,
@@ -525,7 +523,6 @@ const setup = Effect.gen(function* () {
    discard: true,
  })
  yield* IdentityPlugin.Plugin.effect(pluginHost)
-  yield* NativeCompactionPlugin.Plugin.effect(pluginHost)
  yield* agents.transform((editor) =>
    editor.update(Agent.ID.make("build"), (agent) => {
      agent.mode = "primary"
@@ -48,8 +48,7 @@ test("does not package external copies of bundled dependencies", () => {
  expect(pkg.devDependencies.effect).toBe("catalog:")
  expect(pkg.devDependencies["@effect/platform-node"]).toBe("catalog:")
  expect(pkg.devDependencies["drizzle-orm"]).toBe("catalog:")
-  // IPC crosses the port by structured clone; no MessagePack runtime or native accelerator ships.
-  expect(Object.keys(pkg.optionalDependencies)).not.toContain("msgpackr-extract")
+  expect(pkg.optionalDependencies["msgpackr-extract"]).toBe("3.0.4")
 })

 test("keeps PTY binaries without stale native packaging", () => {
@@ -102,6 +101,6 @@ test("bundles one Effect runtime and Drizzle while keeping native dependencies e
  expect(imports).toContain("node:sqlite")
  expect(chunks.some((chunk) => chunk.dynamicImports.includes("@zip.js/zip.js"))).toBe(true)
  expect(imports).toContain(`@lydell/node-pty-${process.platform}-${process.arch}`)
-  expect(modules.some((id) => id.includes("/node_modules/msgpackr"))).toBe(false)
-  expect(chunks.some((chunk) => chunk.code.includes("msgpackr"))).toBe(false)
+  expect(modules.some((id) => id.includes("/node_modules/msgpackr-extract/"))).toBe(false)
+  expect(chunks.some((chunk) => chunk.code.includes("msgpackr-extract"))).toBe(true)
 }, 30_000)
@@ -58,9 +58,9 @@ const require = __cjs_mod__.createRequire(import.meta.url);
        },
      },
      externalizeDeps: {
-        // Bundle the Effect family together.
+        // Bundle the Effect family together; native MessagePack acceleration stays optional and external.
        exclude: ["effect", "@effect/platform-node", "@effect/platform-node-shared", "drizzle-orm"],
-        include: [nodePtyPkg],
+        include: [nodePtyPkg, "msgpackr-extract"],
      },
    },
    plugins: [
@@ -1,7 +1,7 @@
 {
  "name": "@opencode/desktop",
  "private": true,
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "homepage": "https://opencode.ai",
@@ -68,6 +68,7 @@
    "@lydell/node-pty-linux-arm64": "1.2.0-beta.12",
    "@lydell/node-pty-linux-x64": "1.2.0-beta.12",
    "@lydell/node-pty-win32-arm64": "1.2.0-beta.12",
-    "@lydell/node-pty-win32-x64": "1.2.0-beta.12"
+    "@lydell/node-pty-win32-x64": "1.2.0-beta.12",
+    "msgpackr-extract": "3.0.4"
  }
 }
@@ -3,22 +3,17 @@ import { EventEmitter } from "node:events"
 import { MessageChannel } from "node:worker_threads"
 import type { MessagePortMain, WebContents } from "electron"
 import { Context, Effect, Layer, ManagedRuntime, Option, Queue, Schema, Stream } from "effect"
-import { Rpc, RpcClient, RpcClientError, RpcGroup, RpcMessage, RpcServer } from "effect/unstable/rpc"
-import { Transferable } from "effect/unstable/workers"
+import { Rpc, RpcClient, RpcClientError, RpcGroup, RpcMessage, RpcSerialization, RpcServer } from "effect/unstable/rpc"
 import { IpcPortHandoff, IpcServerProtocolLive } from "./ipc-transport"

 describe("desktop RPC transport", () => {
  test("keeps multiple renderer ports independent", async () => {
-    let received: unknown
    const handlers = TestRpcs.toLayer(
      Effect.gen(function* () {
        const handoff = yield* IpcPortHandoff
        return TestRpcs.of({
          "test.focused": (_request, context) => Effect.succeed(handoff.sender(context.client.id)?.id === 1),
-          "test.blob.put": ({ data }) => {
-            received = data
-            return Effect.succeed([...data].join(","))
-          },
+          "test.blob.put": ({ data }) => Effect.succeed([...data].join(",")),
          "test.blob.get": () => Effect.succeed(new Uint8Array([3, 1, 4])),
          "test.events": () => Stream.make(new TestEvent({ value: "session.new" })),
        })
@@ -39,8 +34,6 @@ describe("desktop RPC transport", () => {
    expect(focused).toBe(true)
    expect(unfocused).toBe(false)
    expect(await putBlob(firstClient, new Uint8Array([2, 7, 1]))).toBe("2,7,1")
-    // Binary payloads arrive as bytes, not as base64 text.
-    expect(received).toBeInstanceOf(Uint8Array)
    expect(await getBlob(firstClient)).toEqual(new Uint8Array([3, 1, 4]))
    expect(await firstEvent(firstClient)).toEqual(new TestEvent({ value: "session.new" }))

@@ -61,8 +54,8 @@ describe("desktop RPC transport", () => {
 class TestEvent extends Schema.TaggedClass<TestEvent>()("TestEvent", { value: Schema.String }) {}
 const TestRpcs = RpcGroup.make(
  Rpc.make("test.focused", { success: Schema.Boolean }),
-  Rpc.make("test.blob.put", { payload: { data: Transferable.Uint8Array }, success: Schema.String }),
-  Rpc.make("test.blob.get", { success: Transferable.Uint8Array }),
+  Rpc.make("test.blob.put", { payload: { data: Schema.Uint8Array }, success: Schema.String }),
+  Rpc.make("test.blob.get", { success: Schema.Uint8Array }),
  Rpc.make("test.events", { success: TestEvent, stream: true }),
 )
 type TestRpcClient = RpcClient.FromGroup<typeof TestRpcs, RpcClientError.RpcClientError>
@@ -116,9 +109,13 @@ function clientProtocol(port: MessagePort) {
    RpcClient.Protocol,
    RpcClient.Protocol.make(
      Effect.fnUntraced(function* (writeResponse, clientIds) {
+        const serialization = yield* RpcSerialization.RpcSerialization
+        const parser = serialization.makeUnsafe()
        const inbound = yield* Queue.unbounded<RpcMessage.FromServerEncoded>()
        const onMessage = (event: MessageEvent) =>
-          Queue.offerUnsafe(inbound, event.data as RpcMessage.FromServerEncoded)
+          parser
+            .decode(event.data)
+            .forEach((message) => Queue.offerUnsafe(inbound, message as RpcMessage.FromServerEncoded))
        port.addEventListener("message", onMessage)
        port.start()
        yield* Effect.addFinalizer(() =>
@@ -134,15 +131,18 @@ function clientProtocol(port: MessagePort) {
          Effect.forkScoped,
        )
        return {
-          codecFor: Schema.toCodecJson,
+          codecFor: serialization.codecFor,
          send: (_clientId: number, request: RpcMessage.FromClientEncoded) =>
-            Effect.sync(() => port.postMessage(request)),
+            Effect.sync(() => {
+              const encoded = parser.encode(request)
+              if (encoded !== undefined) port.postMessage(encoded)
+            }),
          supportsAck: true,
          supportsTransferables: false,
        }
      }),
    ),
-  )
+  ).pipe(Layer.provide(RpcSerialization.layerMsgPack))
 }

 function sender(id: number) {
@@ -1,12 +1,13 @@
 import type { MessagePortMain, WebContents } from "electron"
-import { Context, Effect, Layer, Option, Queue, Schema, Stream } from "effect"
-import { RpcMessage, RpcServer } from "effect/unstable/rpc"
+import { Context, Effect, Layer, Option, Queue, Stream } from "effect"
+import { RpcMessage, RpcSerialization, RpcServer } from "effect/unstable/rpc"
 import { bindIpcEvents } from "./ipc-events"

 type PortBinding = {
  readonly id: number
  readonly sender: WebContents
  readonly port: MessagePortMain
+  readonly parser: RpcSerialization.Parser
  readonly onMessage: (event: Electron.MessageEvent) => void
  readonly onClose: () => void
  readonly unbindEvents: Effect.Effect<void>
@@ -19,9 +20,6 @@ type Handoff = {

 export class IpcPortHandoff extends Context.Service<IpcPortHandoff, Handoff>()("opencode/desktop/IpcPortHandoff") {}

-// Messages cross the port by structured clone, like Effect's worker protocol: no serialization
-// layer, so binary payloads stay binary and nothing is packed into a shared buffer. Electron's
-// MessagePortMain can only transfer ports, so byte payloads are cloned in both directions.
 export const IpcServerProtocolLive = Layer.unwrap(
  Effect.gen(function* () {
    const handoffs = yield* Queue.unbounded<readonly [WebContents, MessagePortMain]>()
@@ -32,6 +30,7 @@ export const IpcServerProtocolLive = Layer.unwrap(
      RpcServer.Protocol,
      RpcServer.Protocol.make(
        Effect.fnUntraced(function* (writeRequest) {
+          const serialization = yield* RpcSerialization.RpcSerialization
          const disconnects = yield* Queue.unbounded<number>()
          const inbound = yield* Queue.unbounded<readonly [number, RpcMessage.FromClientEncoded]>()
          const runFork = Effect.runForkWith(yield* Effect.context())
@@ -59,12 +58,21 @@ export const IpcServerProtocolLive = Layer.unwrap(
            }

            const id = nextClientId++
+            const parser = serialization.makeUnsafe()
            const onMessage = (event: Electron.MessageEvent) => {
-              Queue.offerUnsafe(inbound, [id, event.data as RpcMessage.FromClientEncoded] as const)
+              try {
+                parser
+                  .decode(event.data)
+                  .forEach((message) =>
+                    Queue.offerUnsafe(inbound, [id, message as RpcMessage.FromClientEncoded] as const),
+                  )
+              } catch {
+                return
+              }
            }
            const onClose = () => runFork(disconnect(id))
            const unbindEvents = yield* bindIpcEvents(sender.id)
-            const binding = { id, sender, port, onMessage, onClose, unbindEvents }
+            const binding = { id, sender, port, parser, onMessage, onClose, unbindEvents }
            bindings.set(id, binding)
            senderBindings.set(sender.id, id)
            port.on("message", onMessage)
@@ -84,11 +92,14 @@ export const IpcServerProtocolLive = Layer.unwrap(
          yield* Effect.addFinalizer(() => Effect.forEach([...bindings.keys()], disconnect, { discard: true }))

          return {
-            codecFor: Schema.toCodecJson,
+            codecFor: serialization.codecFor,
            disconnects,
            send: (clientId, response) =>
              Effect.sync(() => {
-                bindings.get(clientId)?.port.postMessage(response)
+                const binding = bindings.get(clientId)
+                if (!binding) return
+                const encoded = binding.parser.encode(response)
+                if (encoded !== undefined) binding.port.postMessage(encoded)
              }),
            end: disconnect,
            clientIds: Effect.sync(() => new Set(bindings.keys())),
@@ -112,4 +123,4 @@ export const IpcServerProtocolLive = Layer.unwrap(
      }),
    )
  }),
-)
+).pipe(Layer.provide(RpcSerialization.layerMsgPack))
@@ -98,10 +98,8 @@ export function createDraftStore(
      orphans = true
      return id
    },
-    getBlob(id: string): Uint8Array<ArrayBuffer> | null {
-      const data = db.select({ data: blobs.data }).from(blobs).where(eq(blobs.id, id)).get()?.data
-      // node:sqlite allocates a dedicated ArrayBuffer per BLOB column value.
-      return data ? (data as Uint8Array<ArrayBuffer>) : null
+    getBlob(id: string): Uint8Array | null {
+      return db.select({ data: blobs.data }).from(blobs).where(eq(blobs.id, id)).get()?.data ?? null
    },
    flush: writer.flush,
    close: writer.close,
@@ -1,5 +1,5 @@
-import { Context, Effect, Layer, ManagedRuntime, Queue, Schema, Stream } from "effect"
-import { RpcClient, RpcMessage } from "effect/unstable/rpc"
+import { Context, Effect, Layer, ManagedRuntime, Queue, Stream } from "effect"
+import { RpcClient, RpcMessage, RpcSerialization } from "effect/unstable/rpc"
 import { DesktopRpcs, type DesktopRpcClient } from "../shared/ipc-rpc"
 import type { DesktopEvent } from "../shared/ipc-rpc/events"
 import { IpcTransportPort } from "../shared/ipc-transport"
@@ -79,17 +79,22 @@ export function listen<Tag extends EventTag>(tag: Tag, listener: (value: EventVa
  }
 }

-// Structured clone over the port, like Effect's worker protocol: no serialization layer, so binary
-// payloads stay binary. Buffers are cloned rather than transferred: Electron's MessagePortMain
-// drops transferred ArrayBuffers, so a request carrying one would never arrive.
 function clientProtocol(value: MessagePort) {
  return Layer.effect(
    RpcClient.Protocol,
    RpcClient.Protocol.make(
      Effect.fnUntraced(function* (writeResponse, clientIds) {
+        const serialization = yield* RpcSerialization.RpcSerialization
+        const parser = serialization.makeUnsafe()
        const inbound = yield* Queue.unbounded<RpcMessage.FromServerEncoded>()
        const onMessage = (event: MessageEvent) => {
-          Queue.offerUnsafe(inbound, event.data as RpcMessage.FromServerEncoded)
+          try {
+            parser
+              .decode(event.data)
+              .forEach((message) => Queue.offerUnsafe(inbound, message as RpcMessage.FromServerEncoded))
+          } catch {
+            return
+          }
        }
        value.addEventListener("message", onMessage)
        value.start()
@@ -106,15 +111,16 @@ function clientProtocol(value: MessagePort) {
          Effect.forkScoped,
        )
        return {
-          codecFor: Schema.toCodecJson,
+          codecFor: serialization.codecFor,
          send: (_clientId, request) =>
            Effect.sync(() => {
-              value.postMessage(request)
+              const encoded = parser.encode(request)
+              if (encoded !== undefined) value.postMessage(encoded)
            }),
          supportsAck: true,
          supportsTransferables: false,
        }
      }),
    ),
-  )
+  ).pipe(Layer.provide(RpcSerialization.layerMsgPack))
 }
@@ -1,6 +1,5 @@
 import { Schema } from "effect"
 import { Rpc, RpcGroup } from "effect/unstable/rpc"
-import { Transferable } from "effect/unstable/workers"

 const OptionalString = Schema.optional(Schema.String)
 const PickerOptions = Schema.Struct({
@@ -19,7 +18,7 @@ const PickedFiles = Schema.Struct({
  token: Schema.String,
  files: Schema.Array(Schema.Struct({ path: Schema.String, name: Schema.String, size: Schema.Number })),
 })
-const ClipboardImage = Schema.Struct({ buffer: Transferable.Uint8Array, width: Schema.Number, height: Schema.Number })
+const ClipboardImage = Schema.Struct({ buffer: Schema.Uint8Array, width: Schema.Number, height: Schema.Number })

 export const FilesOpenDirectoryPicker = Rpc.make("FilesOpenDirectoryPicker", {
  payload: { options: Schema.optional(PickerOptions) },
@@ -31,7 +30,7 @@ export const FilesOpenFilePicker = Rpc.make("FilesOpenFilePicker", {
 })
 export const FilesReadPickedFile = Rpc.make("FilesReadPickedFile", {
  payload: { token: Schema.String, path: Schema.String },
-  success: Transferable.Uint8Array,
+  success: Schema.Uint8Array,
 })
 export const FilesReleasePickedFiles = Rpc.make("FilesReleasePickedFiles", {
  payload: { token: Schema.String },
@@ -1,6 +1,5 @@
 import { Schema } from "effect"
 import { Rpc, RpcGroup } from "effect/unstable/rpc"
-import { Transferable } from "effect/unstable/workers"

 export const StorageItems = Rpc.make("StorageItems", {
  payload: { name: Schema.String },
@@ -25,12 +24,12 @@ export const DraftsSet = Rpc.make("DraftsSet", {
 })
 export const DraftsDelete = Rpc.make("DraftsDelete", { payload: { key: Schema.String } })
 export const DraftsPutBlob = Rpc.make("DraftsPutBlob", {
-  payload: { data: Transferable.Uint8Array },
+  payload: { data: Schema.Uint8Array },
  success: Schema.String,
 })
 export const DraftsGetBlob = Rpc.make("DraftsGetBlob", {
  payload: { id: Schema.String },
-  success: Schema.NullOr(Transferable.Uint8Array),
+  success: Schema.NullOr(Schema.Uint8Array),
 })

 export const StorageRpcs = RpcGroup.make(
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/enterprise",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "license": "MIT",
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/function",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "$schema": "https://json.schemastore.org/package.json",
  "private": true,
  "type": "module",
@@ -1,6 +1,6 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "name": "@opencode/http-recorder",
  "description": "Record and replay Effect HTTP and WebSocket traffic with deterministic cassettes",
  "type": "module",
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/httpapi-codegen",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "exports": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/latex",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "exports": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/merman",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "exports": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/plugin-browser",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "description": "OpenCode's desktop browser plugin",
  "type": "module",
  "license": "MIT",
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/plugin",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "scripts": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/protocol",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/schema",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -1,6 +1,6 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "name": "@opencode/sdk",
  "type": "module",
  "license": "MIT",
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/server",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/session-ui",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "license": "MIT",
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/simulation",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/stats-app",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "license": "MIT",
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/stats-core",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "license": "MIT",
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/stats-server",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "license": "MIT",
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/theme",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/tui",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "private": true,
  "type": "module",
  "license": "MIT",
@@ -1,7 +1,7 @@
 import { Plugin } from "@opencode/plugin/tui"
 import { TextAttributes, type ScrollBoxRenderable } from "@opentui/core"
-import { useKeyboard } from "@opentui/solid"
-import { createSignal, Show } from "solid-js"
+import { useKeyboard, useTerminalDimensions } from "@opentui/solid"
+import { createMemo, createSignal, Show } from "solid-js"
 import { Spinner } from "../../component/spinner"
 import { useConfig } from "../../config"
 import { useClipboard } from "../../context/clipboard"
@@ -90,6 +90,8 @@ function Answer(props: { question: string; answer: string }) {
  const overlay = useTheme("overlay")
  const syntax = useThemes().currentSyntax
  const config = useConfig().data
+  const dimensions = useTerminalDimensions()
+  const maxHeight = createMemo(() => Math.max(3, Math.floor(dimensions().height / 2)))
  const [copied, setCopied] = createSignal(false)
  let scroll: ScrollBoxRenderable | undefined

@@ -109,8 +111,8 @@ function Answer(props: { question: string; answer: string }) {
    if (!scroll) return
    if (event.name === "up") return scroll.scrollBy(-1)
    if (event.name === "down") return scroll.scrollBy(1)
-    if (event.name === "pageup") return scroll.scrollBy(-20)
-    if (event.name === "pagedown") return scroll.scrollBy(20)
+    if (event.name === "pageup") return scroll.scrollBy(-maxHeight())
+    if (event.name === "pagedown") return scroll.scrollBy(maxHeight())
    if (event.name === "home") return scroll.scrollTo(0)
    if (event.name === "end") return scroll.scrollTo(scroll.scrollHeight)
  })
@@ -126,15 +128,13 @@ function Answer(props: { question: string; answer: string }) {
            esc
          </text>
        </box>
-        <box paddingTop={1}>
-          <text fg={theme.text.subdued} wrapMode="word">
-            {props.question}
-          </text>
-        </box>
+        <text fg={theme.text.subdued} wrapMode="word">
+          {props.question}
+        </text>
      </box>
      <scrollbox
        ref={(element: ScrollBoxRenderable) => (scroll = element)}
-        maxHeight={20}
+        maxHeight={maxHeight()}
        backgroundColor={overlay.background.default}
        scrollbarOptions={{ visible: false }}
        scrollAcceleration={getScrollAcceleration(config)}
@@ -1,6 +1,6 @@
 {
  "name": "@opencode/ui",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -1,7 +1,7 @@
 {
  "$schema": "https://json.schemastore.org/package.json",
  "name": "@opencode/util",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "type": "module",
  "license": "MIT",
  "repository": {
@@ -27,12 +27,7 @@ export const load = (dir: string) =>
        warn: false,
      })
      await config.load()
-      const flat = { ...(config.flat as Record<string, unknown>) }
-      // Config assumes npmPath points at an npm CLI installation and synthesizes
-      // bin/npm-cli.js beneath it. Ours only supplies npm's config definitions,
-      // so let pacote resolve the real npm executable from PATH instead.
-      delete flat.npmBin
-      return flat
+      return config.flat as Record<string, unknown>
    },
    catch: (cause) => cause,
  }).pipe(Effect.orElseSucceed(() => ({}) as Record<string, unknown>))
@@ -2,7 +2,7 @@
  "name": "@opencode/web",
  "type": "module",
  "license": "MIT",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "scripts": {
    "dev": "astro dev",
    "dev:remote": "VITE_API_URL=https://api.opencode.ai astro dev",
@@ -2,7 +2,7 @@
  "name": "opencode",
  "displayName": "opencode",
  "description": "opencode for VS Code",
-  "version": "2.0.8",
+  "version": "2.0.7",
  "publisher": "sst-dev",
  "repository": {
    "type": "git",
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Aiden Cline	c92541a40d	refactor(codemode): check the Headers receiver before calling the host	2026-09-18 01:05:10 -05:00
Aiden Cline	ee7317fbcf	test(codemode): keep only the Headers WPT cases that exercise the runtime	2026-09-18 01:05:09 -05:00
Aiden Cline	2f8f4975f3	fix(codemode): let Headers methods report a bad receiver	2026-09-18 01:05:09 -05:00
Aiden Cline	c91b330887	docs(codemode): replace the stale Values section with Extension.make	2026-09-18 01:05:09 -05:00
Aiden Cline	7b01b0224a	feat(codemode): add the Headers built-in	2026-09-18 01:05:09 -05:00