feat(core): allow shell for explore

fix(core): honor compaction agent model for summaries (#53276 )
Co-authored-by: Padure Sergio <70955746+sergiopadure@users.noreply.github.com>
2026-10-05 15:06:16 +00:00 · 2026-10-04 23:31:43 -05:00 · 2026-10-04 23:20:24 -05:00 · 2026-10-04 23:17:15 -05:00 · 2026-10-05 04:15:19 +00:00 · 2026-10-04 23:06:43 -05:00
369 changed files with 11847 additions and 4378 deletions
@@ -383,7 +383,6 @@
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        "tree-sitter-powershell": "0.25.10",
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        "which": "6.0.1",
        "zod": "catalog:",
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@@ -6393,12 +6386,6 @@

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@@ -6703,12 +6690,6 @@

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@@ -7257,8 +7238,6 @@

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@@ -7557,10 +7536,6 @@

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@@ -1,7 +1,7 @@
 {
  "nodeModules": {
-    "x86_64-linux": "sha256-2RlbJRTEKSliuUbAE2lAktX63JFR/RKAuLkcCou8wb4=",
-    "aarch64-linux": "sha256-P7DAE018lTJNGmttg87U9oaTAuw/wHlnMStdnXYKCr0=",
-    "aarch64-darwin": "sha256-N+NfV1ObOTnW+ez7As+CS+6ci/iRGCQ6cslvyQFCp6E="
+    "x86_64-linux": "sha256-4AqU8dPEwo0ukoyEX1SuDVzsXQ7G/fIPnxoL400zH4M=",
+    "aarch64-linux": "sha256-p75sJYtR8a4oVKb1+Dgp8Kl+1onSmUw5NRv95bbV1+E=",
+    "aarch64-darwin": "sha256-Psyvbw/lGulysQlhK/MqcHVIwx2aCDTr+Pfr+gRWsG4="
  }
 }
@@ -106,6 +106,41 @@ for await (const event of ai.llm.stream(ai.llm.request(input))) {
 await ai.dispose()
 ```

+## Venice AI
+
+`Venice` provides native Chat Completions with streaming tools and reasoning. `model` and `chat`
+select the same API; credentials default to `VENICE_API_KEY`.
+
+```ts
+import { LLM } from "@opencode/ai"
+import { Venice } from "@opencode/ai/providers"
+import { Effect } from "effect"
+
+const program = Effect.gen(function* () {
+  const response = yield* LLM.generate({
+    model: Venice.configure({ apiKey: process.env.VENICE_API_KEY }).chat("qwen3-6-27b"),
+    prompt: "Explain this design.",
+    providerOptions: {
+      reasoningEffort: "high",
+      veniceParameters: { includeVeniceSystemPrompt: false },
+    },
+  })
+  console.log(response.text)
+})
+```
+
+Effort lowers to `reasoning.effort`; `reasoning.enabled` and `reasoning.summary` are also available.
+Supported effort levels and toggles depend on the selected model. Omitted controls preserve its defaults.
+Venice's added system prompt is disabled by default, matching the previous OpenCode Venice SDK behavior.
+
+Replay complete `response.message` values to retain signed/encrypted reasoning and Gemini thought
+signatures, including per-tool signatures. Venice's encrypted scalar trailers are excluded from visible
+reasoning but retained in provider metadata for replay. Cache affinity uses `promptCacheKey`, and cache-write
+usage reads Venice's `cache_creation_input_tokens` field.
+
+The native package entrypoint is `@opencode/ai/providers/venice`. Image generation, embeddings, Responses, and
+client-side E2EE are not implemented by this provider.
+
 ## Experimental evaluation

 Evaluation models compare shared state with typed choice, score, and boolean questions. The API is
@@ -42,6 +42,7 @@ const RESPECTS_INLINE_HINTS = new Set([
  "alibaba-messages",
  "anthropic-messages",
  "anthropic-compatible-messages",
+  "bedrock-mantle-messages",
  "cloudflare-ai-gateway-messages",
  "google-vertex-messages",
  "meta-messages",
@@ -584,10 +584,7 @@ const serverToolResultType = (name: string): AnthropicServerToolResultType | und
  return undefined
 }

-const lowerServerToolResult = Effect.fn("AnthropicMessages.lowerServerToolResult")(function* (
-  part: ToolResultPart,
-  providerMetadataKey: string,
-) {
+const lowerServerToolResult = Effect.fnUntraced(function* (part: ToolResultPart, providerMetadataKey: string) {
  const wireType = serverToolResultType(part.name)
  if (!wireType)
    return yield* invalid(`Anthropic Messages does not know how to round-trip server tool result for ${part.name}`)
@@ -657,10 +654,7 @@ const citationsFromMetadata = (metadata: MediaPart["metadata"]): AnthropicDocume

 const isHttpUrl = (value: string) => /^https?:\/\//i.test(value.trim())

-const lowerMedia = Effect.fn("AnthropicMessages.lowerMedia")(function* (
-  part: MediaPart,
-  breakpoints?: Cache.Breakpoints,
-) {
+const lowerMedia = Effect.fnUntraced(function* (part: MediaPart, breakpoints?: Cache.Breakpoints) {
  const mime = part.media.mediaType.toLowerCase()
  const cacheControlValue = breakpoints ? cacheControl(breakpoints, part.cache) : undefined
  const fileId = fileIdFromMetadata(part.metadata)
@@ -804,9 +798,6 @@ const requireThinkingSignature = (request: LLMRequest) => {
  return true
 }

-// Mid-conversation system messages became available with Opus 4.8 and version
-// 5 of the other supported Claude families. Treat later family versions as
-// compatible without assuming that every Anthropic Messages model is Claude.
 // Opus 4.8 and every Claude 5 model accept mid-conversation system messages; later versions inherit support.
 const supportsNativeSystemUpdates = (request: LLMRequest) => {
  const version = claudeVersion(String(request.model.id))
@@ -815,25 +806,9 @@ const supportsNativeSystemUpdates = (request: LLMRequest) => {
  return version.major >= 5
 }

-const endsInServerToolUse = (message: LLMRequest["messages"][number]) => {
-  const last = message.content.at(-1)
-  return message.role === "assistant" && last?.type === "tool-call" && last.providerExecuted === true
-}
-
-const canUseNativeSystemUpdate = (request: LLMRequest, index: number) => {
-  const previous = request.messages[index - 1]
-  const next = request.messages[index + 1]
-  // Vertex currently rejects/404s for a system message after local tool results,
-  // so fold it into the user tool-result turn across continuations and history.
-  if (request.model.route.id === "google-vertex-messages" && previous?.role === "tool") return false
-  return (
-    previous !== undefined &&
-    previous.role !== "system" &&
-    (previous.role === "user" || previous.role === "tool" || endsInServerToolUse(previous)) &&
-    next?.role !== "system" &&
-    (next === undefined || next.role === "assistant")
-  )
-}
+// Native system messages must follow a user turn (tool results count) or a paused server-tool turn.
+const acceptsNativeSystemAfter = (message: AnthropicMessage | undefined) =>
+  message?.role === "user" || (message?.role === "assistant" && message.content.at(-1)?.type === "server_tool_use")

 const splitsLocalToolResults = (messages: LLMRequest["messages"], index: number) => {
  const pending = new Set<string>()
@@ -847,7 +822,7 @@ const splitsLocalToolResults = (messages: LLMRequest["messages"], index: number)
  return pending.size > 0
 }

-const lowerNativeSystemUpdate = Effect.fn("AnthropicMessages.lowerNativeSystemUpdate")(function* (
+const lowerNativeSystemUpdate = Effect.fnUntraced(function* (
  message: LLMRequest["messages"][number],
  breakpoints: Cache.Breakpoints,
 ) {
@@ -862,12 +837,34 @@ const lowerNativeSystemUpdate = Effect.fn("AnthropicMessages.lowerNativeSystemUp
  }
 })

-const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
-  request: LLMRequest,
+const lowerWrappedSystemUpdate = Effect.fnUntraced(function* (
+  message: LLMRequest["messages"][number],
  breakpoints: Cache.Breakpoints,
 ) {
+  const part = yield* ProviderShared.wrappedSystemUpdate("Anthropic Messages", message)
+  return { type: "text" as const, text: part.text, cache_control: cacheControl(breakpoints, part.cache) }
+})
+
+const appendToUserTurn = (messages: AnthropicMessage[], block: AnthropicUserBlock) => {
+  const last = messages.at(-1)
+  if (last?.role === "user") messages[messages.length - 1] = { role: "user", content: [...last.content, block] }
+  else messages.push({ role: "user", content: [block] })
+}
+
+const lowerMessages = Effect.fnUntraced(function* (request: LLMRequest, breakpoints: Cache.Breakpoints) {
  const messages: AnthropicMessage[] = []
  const providerMetadataKey = request.model.route.providerMetadataKey ?? String(request.model.provider)
+  // Text updates stay where they are unless a user turn follows them; then they move after the latest
+  // user turn, the nearest spot where Anthropic accepts a native system message.
+  const holdUpdates = supportsNativeSystemUpdates(request)
+  const held: Array<LLMRequest["messages"][number]> = []
+  const releaseHeld = Effect.fnUntraced(function* () {
+    const native = acceptsNativeSystemAfter(messages.findLast((message) => message.role !== "system"))
+    for (const update of held.splice(0)) {
+      if (native) messages.push(yield* lowerNativeSystemUpdate(update, breakpoints))
+      else appendToUserTurn(messages, yield* lowerWrappedSystemUpdate(update, breakpoints))
+    }
+  })

  for (const [index, message] of request.messages.entries()) {
    if (message.role === "system") {
@@ -879,16 +876,8 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
      }
      if (splitsLocalToolResults(request.messages, index))
        return yield* invalid("Anthropic Messages system updates cannot split a local tool call from its tool result")
-      if (supportsNativeSystemUpdates(request) && canUseNativeSystemUpdate(request, index)) {
-        messages.push(yield* lowerNativeSystemUpdate(message, breakpoints))
-        continue
-      }
-      const part = yield* ProviderShared.wrappedSystemUpdate("Anthropic Messages", message)
-      const block = { type: "text" as const, text: part.text, cache_control: cacheControl(breakpoints, part.cache) }
-      const previous = messages.at(-1)
-      if (previous?.role === "user")
-        messages[messages.length - 1] = { role: "user", content: [...previous.content, block] }
-      else messages.push({ role: "user", content: [block] })
+      if (holdUpdates) held.push(message)
+      else appendToUserTurn(messages, yield* lowerWrappedSystemUpdate(message, breakpoints))
      continue
    }

@@ -964,7 +953,9 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
          `Anthropic Messages assistant messages only support text, reasoning, and tool-call content for now`,
        )
      }
-      if (content.length > 0) messages.push({ role: "assistant", content })
+      if (content.length === 0) continue
+      yield* releaseHeld()
+      messages.push({ role: "assistant", content })
      continue
    }

@@ -985,10 +976,14 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
      messages[messages.length - 1] = { role: "user", content: [...previous.content, ...content] }
    else messages.push({ role: "user", content })
  }
+  yield* releaseHeld()

  return messages
 })

+// TODO: Move per-model capability heuristics (`supportsEffortUpdates`, `supportsNativeSystemUpdates`,
+// `supportsThinkingBlockBinding`) into explicit model/provider `compatibility` metadata so the protocol
+// only reads `request.model.compatibility`.
 // Per-turn effort started with Claude Opus 5 and every Claude 5.1 model; later versions of any family inherit it.
 const supportsEffortUpdates = (model: LLMRequest["model"]) => {
  const override = model.compatibility?.supportsEffortUpdates
@@ -1300,7 +1295,7 @@ const onContentBlockStart = (
  return [{ ...state, lifecycle: Lifecycle.stepStart(state.lifecycle, events) }, [...events, result]]
 }

-const onContentBlockDelta = Effect.fn("AnthropicMessages.onContentBlockDelta")(function* (
+const onContentBlockDelta = Effect.fnUntraced(function* (
  state: ParserState,
  event: AnthropicEvent & { readonly delta: AnthropicStreamDelta },
 ) {
@@ -1368,7 +1363,7 @@ const onContentBlockDelta = Effect.fn("AnthropicMessages.onContentBlockDelta")(f
  return [state, NO_EVENTS] satisfies StepResult
 })

-const onContentBlockStop = Effect.fn("AnthropicMessages.onContentBlockStop")(function* (
+const onContentBlockStop = Effect.fnUntraced(function* (
  state: ParserState,
  event: AnthropicEvent,
 ) {
@@ -1439,7 +1434,7 @@ const onMessageDelta = (
  ]
 }

-const onMessageStop = Effect.fn("AnthropicMessages.onMessageStop")(function* (state: ParserState) {
+const onMessageStop = Effect.fnUntraced(function* (state: ParserState) {
  if (Object.keys(state.compactions).length)
    return yield* ProviderShared.eventError(ADAPTER, "Response ended with an incomplete compaction block")
  const result = yield* ToolStream.finishAll(ADAPTER, state.tools)
@@ -285,7 +285,7 @@ const lowerToolCall = (part: ToolCallPart, normalizeID: (id: string) => string):
  },
 })

-const lowerToolResultContent = Effect.fn("BedrockConverse.lowerToolResultContent")(function* (
+const lowerToolResultContent = Effect.fnUntraced(function* (
  part: ToolResultPart,
  documentNames: Set<string>,
 ) {
@@ -305,7 +305,7 @@ const lowerToolResultContent = Effect.fn("BedrockConverse.lowerToolResultContent
  return content
 })

-const lowerToolResult = Effect.fn("BedrockConverse.lowerToolResult")(function* (
+const lowerToolResult = Effect.fnUntraced(function* (
  part: ToolResultPart,
  documentNames: Set<string>,
  normalizeID: (id: string) => string,
@@ -322,7 +322,7 @@ const lowerToolResult = Effect.fn("BedrockConverse.lowerToolResult")(function* (
 // Keep Claude and Nova tool-result images inline; put other models' images beside the result.
 const keepToolImagesInline = (id: string) => id.includes("anthropic.claude-") || id.includes("amazon.nova-")

-const lowerMessages = Effect.fn("BedrockConverse.lowerMessages")(function* (
+const lowerMessages = Effect.fnUntraced(function* (
  request: LLMRequest,
  breakpoints: BedrockCache.Breakpoints,
 ) {
@@ -75,7 +75,7 @@ const usesSse = (request: MediaProtocol.Addressed<Request>) => request.mode ===

 const CONTAINERS: Readonly<Record<string, "raw" | "wav" | "mp3">> = { pcm: "raw", wav: "wav", mp3: "mp3" }

-const outputFormat = Effect.fn("CartesiaSpeech.outputFormat")(function* (request: MediaProtocol.Addressed<Request>) {
+const outputFormat = Effect.fnUntraced(function* (request: MediaProtocol.Addressed<Request>) {
  const sse = usesSse(request)
  const format = request.format ?? (sse ? "pcm" : "mp3")
  const container = CONTAINERS[format]
@@ -121,7 +121,7 @@ const fromRequest = Effect.fn("CartesiaSpeech.fromRequest")(function* (request:
 // 6. Stream parsing
 // ---------------------------------------------------------------------------

-const onEvent = Effect.fn("CartesiaSpeech.onEvent")(function* (state: State, frame: string) {
+const onEvent = Effect.fnUntraced(function* (state: State, frame: string) {
  const event = yield* decodeEvent(frame)
  if (event.type === "chunk" && event.data !== undefined) return SpeechStream.delta(state, event.data)
  if (event.type === "timestamps" && event.word_timestamps !== undefined) {
@@ -140,7 +140,7 @@ const onEvent = Effect.fn("CartesiaSpeech.onEvent")(function* (state: State, fra
  return [state, []] as const
 })

-const finish = Effect.fn("CartesiaSpeech.finish")(function* (
+const finish = Effect.fnUntraced(function* (
  state: State,
  context: MediaProtocol.ResponseContext<Request>,
 ) {
@@ -252,7 +252,7 @@ const mapUsage = (usage: typeof NativeUsage.Type) =>
  })

 // Lifecycle deltas open blocks on demand and ends are no-ops for closed blocks, so content-start needs no handling.
-const step = Effect.fn("CohereChat.step")(function* (state: State, event: Event) {
+const step = Effect.fnUntraced(function* (state: State, event: Event) {
  const events: LLMEvent[] = []
  switch (event.type) {
    case "message-start":
@@ -95,7 +95,7 @@ const OUTPUT_FORMATS: Readonly<Record<string, string>> = {
 }

 /** WAV is served only by the non-streaming endpoints. */
-const outputFormat = Effect.fn("ElevenLabsSpeech.outputFormat")(function* (request: MediaProtocol.Addressed<Request>) {
+const outputFormat = Effect.fnUntraced(function* (request: MediaProtocol.Addressed<Request>) {
  const format = request.providerOptions?.outputFormat ?? OUTPUT_FORMATS[request.format ?? "mp3"]
  if (format === undefined)
    return yield* route.unsupported(
@@ -138,7 +138,7 @@ const path = (request: MediaProtocol.Addressed<Request>) =>
 // 6. Stream parsing
 // ---------------------------------------------------------------------------

-const onRecord = Effect.fn("ElevenLabsSpeech.onRecord")(function* (state: State, frame: string) {
+const onRecord = Effect.fnUntraced(function* (state: State, frame: string) {
  const record = yield* decodeRecord(frame)
  const [next, events] = SpeechStream.delta(state, record.audio_base64)
  const alignment = record.alignment
@@ -169,7 +169,7 @@ const describeOutput = (format: string) => {
  return encoding === undefined ? SpeechStream.container(codec, sampleRate) : SpeechStream.pcm(encoding, sampleRate)
 }

-const finish = Effect.fn("ElevenLabsSpeech.finish")(function* (
+const finish = Effect.fnUntraced(function* (
  state: State,
  context: MediaProtocol.ResponseContext<Request>,
 ) {
@@ -283,7 +283,7 @@ const lowerToolConfig = (toolChoice: NonNullable<LLMRequest["toolChoice"]>) =>
    tool: (name) => ({ functionCallingConfig: { mode: "ANY" as const, allowedFunctionNames: [name] } }),
  })

-const lowerContentPart = Effect.fn("Gemini.lowerContentPart")(function* (part: TextPart | MediaPart) {
+const lowerContentPart = Effect.fnUntraced(function* (part: TextPart | MediaPart) {
  if (part.type === "text") return { text: part.text }
  return yield* GeminiGenerateContent.mediaPart("Gemini", part.media)
 })
@@ -302,7 +302,7 @@ const lowerToolCall = (part: ToolCallPart, omitIds: boolean, metadataKey: string
  thoughtSignature: thoughtSignature(part.providerMetadata, metadataKey),
 })

-const lowerMessages = Effect.fn("Gemini.lowerMessages")(function* (request: LLMRequest) {
+const lowerMessages = Effect.fnUntraced(function* (request: LLMRequest) {
  const contents: GeminiContent[] = []
  const metadataKey = request.model.route.providerMetadataKey ?? String(request.model.provider)
  const omitCallIds = omitsFunctionCallIds(request.model.id)
@@ -182,7 +182,7 @@ type StepResult = readonly [ParserState, ReadonlyArray<LLMEvent>]
 // =============================================================================
 // Request Body Construction
 // =============================================================================
-const mediaContent = Effect.fn("GoogleInteractions.mediaContent")(function* (asset: Media.Asset) {
+const mediaContent = Effect.fnUntraced(function* (asset: Media.Asset) {
  if (
    asset.kind !== "image" &&
    asset.kind !== "audio" &&
@@ -208,7 +208,7 @@ const signature = (metadata: ProviderMetadata | undefined, key: string) => {
    : undefined
 }

-const lowerMessages = Effect.fn("GoogleInteractions.lowerMessages")(function* (request: LLMRequest) {
+const lowerMessages = Effect.fnUntraced(function* (request: LLMRequest) {
  const steps: InputStep[] = []
  const key = request.model.route.providerMetadataKey ?? String(request.model.provider)
  for (const message of request.messages) {
@@ -275,7 +275,7 @@ const lowerMessages = Effect.fn("GoogleInteractions.lowerMessages")(function* (r
  return steps
 })

-const lowerToolResult = Effect.fn("GoogleInteractions.lowerToolResult")(function* (part: ToolResultPart) {
+const lowerToolResult = Effect.fnUntraced(function* (part: ToolResultPart) {
  if (part.result.type === "json" && ProviderShared.isRecord(part.result.value)) return part.result.value
  if (part.result.type !== "content") return ProviderShared.toolResultText(part)

@@ -364,7 +364,7 @@ const mapUsage = (usage: RawUsage | undefined, key: string) => {
  })
 }

-const onStart = Effect.fn("GoogleInteractions.onStart")(function* (
+const onStart = Effect.fnUntraced(function* (
  state: ParserState,
  index: number,
  step: OutputStep,
@@ -402,7 +402,7 @@ const onStart = Effect.fn("GoogleInteractions.onStart")(function* (
  return [{ ...state, lifecycle, tools, steps: { ...state.steps, [index]: step } }, events] satisfies StepResult
 })

-const onDelta = Effect.fn("GoogleInteractions.onDelta")(function* (
+const onDelta = Effect.fnUntraced(function* (
  state: ParserState,
  index: number,
  delta: typeof Delta.Type,
@@ -447,7 +447,7 @@ const onDelta = Effect.fn("GoogleInteractions.onDelta")(function* (
  return yield* ProviderShared.eventError(ADAPTER, `Unsupported Interactions delta: ${delta.type}`, encodeJson(delta))
 })

-const onStop = Effect.fn("GoogleInteractions.onStop")(function* (state: ParserState, index: number) {
+const onStop = Effect.fnUntraced(function* (state: ParserState, index: number) {
  const step = state.steps[index]
  if (!step) return yield* ProviderShared.eventError(ADAPTER, "Interactions step.stop without step.start")
  const events: LLMEvent[] = []
@@ -465,7 +465,7 @@ const onStop = Effect.fn("GoogleInteractions.onStop")(function* (state: ParserSt
  return [{ ...state, tools: result.tools }, result.events ?? []] satisfies StepResult
 })

-const step = Effect.fn("GoogleInteractions.step")(function* (state: ParserState, event: Event) {
+const step = Effect.fnUntraced(function* (state: ParserState, event: Event) {
  switch (event.event_type) {
    case "step.start":
      return yield* onStart(state, event.index, event.step)
@@ -94,7 +94,7 @@ const fromRequest = Effect.fn("GoogleSpeech.fromRequest")(function* (request: Me
 // 6. Stream parsing
 // ---------------------------------------------------------------------------

-const step = Effect.fn("GoogleSpeech.step")(function* (state: State, frame: string) {
+const step = Effect.fnUntraced(function* (state: State, frame: string) {
  const chunk = yield* decodeChunk(frame)
  const blocked = GeminiGenerateContent.blocked(route.name, chunk, frame)
  if (blocked !== undefined) return yield* blocked
@@ -138,7 +138,7 @@ const turn = (part: Schema.Schema.Type<typeof AudioTranscription>) => {
  }
 }

-const step = Effect.fn("GoogleTranscription.step")(function* (state: State, frame: string) {
+const step = Effect.fnUntraced(function* (state: State, frame: string) {
  const chunk = yield* decodeChunk(frame)
  const blocked = GeminiGenerateContent.blocked(route.name, chunk, frame)
  if (blocked !== undefined) return yield* blocked
@@ -95,7 +95,7 @@ const HOSTED_TOOLS = {
  image_generation_call: {
    name: "image_generation",
    input: () => ({}),
-    result: Effect.fn("MetaResponses.imageResult")(function* (raw: ResponsesHostedTools.Item) {
+    result: Effect.fnUntraced(function* (raw: ResponsesHostedTools.Item) {
      const item = yield* Schema.decodeUnknownEffect(ImageItem)(raw).pipe(
        Effect.mapError((cause) =>
          ProviderShared.eventError(
@@ -136,7 +136,7 @@ const HOSTED_TOOLS = {
  },
 } satisfies ResponsesHostedTools.Definitions

-const onEvent = Effect.fn("MetaResponses.onEvent")(function* (
+const onEvent = Effect.fnUntraced(function* (
  state: OpenResponses.ParserState,
  input: OpenResponses.Event,
 ) {
@@ -173,7 +173,7 @@ const onEvent = Effect.fn("MetaResponses.onEvent")(function* (
  ] satisfies OpenResponses.StepResult
 })

-const step = Effect.fn("MetaResponses.step")(function* (state: ParserState, input: OpenResponses.Event) {
+const step = Effect.fnUntraced(function* (state: ParserState, input: OpenResponses.Event) {
  const completedItems = new Set(state.completedItems)
  const event = OpenResponses.normalize(state, input)
  if (event.type === "response.output_item.done" && event.item && completedItems.has(event.item.id))
@@ -226,7 +226,7 @@ const MistralEvent = Schema.StructWithRest(
 type MistralEvent = Schema.Schema.Type<typeof MistralEvent>
 const MistralStreamEvent = Schema.Union([Schema.Literal(DONE), Protocol.jsonEvent(MistralEvent)])

-const lowerMedia = Effect.fn("MistralChat.lowerMedia")(function* (part: MediaPart) {
+const lowerMedia = Effect.fnUntraced(function* (part: MediaPart) {
  const mime = part.media.mediaType.toLowerCase()
  const url =
    ProviderShared.mediaUrl(part.media) ??
@@ -236,7 +236,7 @@ const lowerMedia = Effect.fn("MistralChat.lowerMedia")(function* (part: MediaPar
  return yield* ProviderShared.invalidRequest(`Mistral Chat does not support media type ${part.media.mediaType}`)
 })

-const lowerUser = Effect.fn("MistralChat.lowerUser")(function* (message: LLMRequest["messages"][number]) {
+const lowerUser = Effect.fnUntraced(function* (message: LLMRequest["messages"][number]) {
  const content: MistralUserContent[] = []
  for (const part of message.content) {
    if (part.type === "text") {
@@ -260,7 +260,7 @@ const lowerToolCall = (part: ToolCallPart, normalizeID: (id: string) => string):
  function: { name: part.name, arguments: ProviderShared.encodeJson(part.input) },
 })

-const lowerAssistant = Effect.fn("MistralChat.lowerAssistant")(function* (
+const lowerAssistant = Effect.fnUntraced(function* (
  message: LLMRequest["messages"][number],
  normalizeID: (id: string) => string,
  prefix: boolean,
@@ -298,7 +298,7 @@ const lowerAssistant = Effect.fn("MistralChat.lowerAssistant")(function* (
  }
 })

-const lowerToolResults = Effect.fn("MistralChat.lowerToolResults")(function* (
+const lowerToolResults = Effect.fnUntraced(function* (
  message: LLMRequest["messages"][number],
  normalizeID: (id: string) => string,
 ) {
@@ -335,7 +335,7 @@ const lowerToolResults = Effect.fn("MistralChat.lowerToolResults")(function* (
  return output
 })

-const lowerMessages = Effect.fn("MistralChat.lowerMessages")(function* (request: LLMRequest) {
+const lowerMessages = Effect.fnUntraced(function* (request: LLMRequest) {
  const normalizeID = MistralToolID.normalizer(request)
  const messages: MistralMessage[] =
    request.system.length === 0
@@ -596,7 +596,7 @@ const toolText = (tool: MistralToolDelta) => {
  return value === null || value === undefined ? "" : ProviderShared.encodeJson(value)
 }

-const appendTools = Effect.fn("MistralChat.appendTools")(function* (
+const appendTools = Effect.fnUntraced(function* (
  initial: ParserState,
  events: LLMEvent[],
  deltas: ReadonlyArray<MistralToolDelta>,
@@ -662,7 +662,7 @@ const hasLateContent = (event: MistralEvent) => {
  )
 }

-const step = Effect.fn("MistralChat.step")(function* (state: ParserState, event: MistralEvent) {
+const step = Effect.fnUntraced(function* (state: ParserState, event: MistralEvent) {
  if (event.error) {
    const body = ProviderShared.encodeJson(event)
    return yield* new AIError({
@@ -726,7 +726,7 @@ const step = Effect.fn("MistralChat.step")(function* (state: ParserState, event:
  ] as const
 })

-const finishEvents = Effect.fn("MistralChat.finishEvents")(function* (state: ParserState) {
+const finishEvents = Effect.fnUntraced(function* (state: ParserState) {
  if (!state.finishReason)
    return yield* new AIError({
      reason: new InvalidProviderOutputError({
@@ -442,7 +442,7 @@ interface ReasoningStreamItem {
 // =============================================================================
 // Request Lowering
 // =============================================================================
-export const lowerTool = Effect.fn("OpenResponses.lowerTool")(function* (protocolName: string, tool: ToolDefinition) {
+export const lowerTool = Effect.fnUntraced(function* (protocolName: string, tool: ToolDefinition) {
  if (tool.native !== undefined)
    return yield* ProviderShared.invalidRequest(`${protocolName} does not support provider-native tool ${tool.name}`)
  return {
@@ -507,7 +507,10 @@ const lowerReasoning = (part: ReasoningPart, providerMetadataKey: string): OpenR
  }
 }

-const lowerMedia = Effect.fn("OpenResponses.lowerMedia")(function* (
+const decodeImageDetail = ProviderShared.validateWith(Schema.decodeUnknownEffect(OpenResponsesInputImage.fields.detail))
+const decodeMessageMetadata = ProviderShared.validateWith(Schema.decodeUnknownEffect(MessageMetadata))
+
+const lowerMedia = Effect.fnUntraced(function* (
  part: MediaPart,
  request: LLMRequest,
  adapter: ProviderAdapter,
@@ -516,9 +519,8 @@ const lowerMedia = Effect.fn("OpenResponses.lowerMedia")(function* (
  const media = part.media.inline()
  const providerMedia = adapter.lowerMedia?.({ part, media, request })
  if (providerMedia) return providerMedia
-  const detail = yield* ProviderShared.validateWith(Schema.decodeUnknownEffect(OpenResponsesInputImage.fields.detail))(
-    part.providerMetadata?.[metadataKey(request.model)]?.detail,
-  )
+  const rawDetail = part.providerMetadata?.[metadataKey(request.model)]?.detail
+  const detail = rawDetail === undefined ? undefined : yield* decodeImageDetail(rawDetail)
  const mime = part.media.mediaType.toLowerCase()
  const url = ProviderShared.mediaUrl(part.media)
  const location = url ?? (yield* ProviderShared.requireInlineMedia(adapter.name, part.media)).dataUrl
@@ -591,7 +593,7 @@ const lowerToolResultOutput = Effect.fnUntraced(function* (

 const DEFAULT_EFFORT = "medium"

-const lowerMessages = Effect.fn("OpenResponses.lowerMessages")(function* (
+const lowerMessages = Effect.fnUntraced(function* (
  request: LLMRequest,
  adapter: ProviderAdapter,
 ) {
@@ -599,9 +601,8 @@ const lowerMessages = Effect.fn("OpenResponses.lowerMessages")(function* (
  const providerMetadataKey = metadataKey(request.model)

  for (const message of request.messages) {
-    const metadata = yield* ProviderShared.validateWith(
-      Schema.decodeUnknownEffect(Schema.UndefinedOr(MessageMetadata)),
-    )(message.providerMetadata?.[providerMetadataKey])
+    const rawMetadata = message.providerMetadata?.[providerMetadataKey]
+    const metadata = rawMetadata === undefined ? undefined : yield* decodeMessageMetadata(rawMetadata)
    if (message.role === "system") {
      const update = effortUpdate(message)
      if (update) {
@@ -755,7 +756,7 @@ const lowerMessages = Effect.fn("OpenResponses.lowerMessages")(function* (
  return input
 })

-export const lowerConversation = Effect.fn("OpenResponses.lowerConversation")(function* (
+export const lowerConversation = Effect.fnUntraced(function* (
  request: LLMRequest,
  adapter: ProviderAdapter,
 ) {
@@ -1142,7 +1143,7 @@ const onReasoningSummaryPartDone = (state: ParserState, event: Event): StepResul
  ]
 }

-const onFunctionCallArgumentsDelta = Effect.fn("OpenResponses.onFunctionCallArgumentsDelta")(function* (
+const onFunctionCallArgumentsDelta = Effect.fnUntraced(function* (
  state: ParserState,
  event: Event,
 ) {
@@ -1173,7 +1174,7 @@ const onFunctionCallArgumentsDelta = Effect.fn("OpenResponses.onFunctionCallArgu
  return [{ ...state, lifecycle, tools: result.tools }, events] satisfies StepResult
 })

-const onOutputItemDone = Effect.fn("OpenResponses.onOutputItemDone")(function* (
+const onOutputItemDone = Effect.fnUntraced(function* (
  state: ParserState,
  item: NormalizedEvent["item"],
 ) {
@@ -1309,7 +1310,7 @@ const onOutputItemDone = Effect.fn("OpenResponses.onOutputItemDone")(function* (
  return [state, NO_EVENTS] satisfies StepResult
 })

-const onResponseFinish = Effect.fn("OpenResponses.onResponseFinish")(function* (state: ParserState, event: Event) {
+const onResponseFinish = Effect.fnUntraced(function* (state: ParserState, event: Event) {
  let current = state
  const events: LLMEvent[] = []
  if (event.type === "response.completed") {
@@ -65,7 +65,7 @@ const ExtraContent = Schema.Struct({
 })
 const decodeExtraContent = (value: unknown) => Option.getOrUndefined(Schema.decodeUnknownOption(ExtraContent)(value))

-const OpenAIChatAssistantToolCall = Schema.Struct({
+export const OpenAIChatAssistantToolCall = Schema.Struct({
  id: Schema.String,
  type: Schema.tag("function"),
  function: Schema.Struct({
@@ -134,7 +134,7 @@ const OpenAIChatUserContent = Schema.Union([
 ])
 type OpenAIChatUserContent = Schema.Schema.Type<typeof OpenAIChatUserContent>

-const OpenAIChatMessage = Schema.Union([
+export const OpenAIChatMessage = Schema.Union([
  Schema.Struct({
    role: Schema.Literal("system"),
    content: Schema.Union([Schema.String, Schema.Array(OpenAIChatUserContent)]),
@@ -200,7 +200,7 @@ export type OpenAIChatBody = Schema.Schema.Type<typeof OpenAIChatBody>
 // The event schema is one decoded SSE `data:` payload. `Framing.sse` splits the
 // byte stream into strings, then `Protocol.jsonEvent` decodes each string into
 // this provider-native event shape.
-const OpenAIChatUsage = Schema.StructWithRest(
+export const OpenAIChatUsage = Schema.StructWithRest(
  Schema.Struct({
    prompt_tokens: optionalNull(Schema.Number),
    completion_tokens: optionalNull(Schema.Number),
@@ -238,7 +238,7 @@ const OpenAIChatToolCallDeltaFunction = Schema.Struct({
  arguments: optionalNull(Schema.String),
 })

-const OpenAIChatToolCallDelta = Schema.Struct({
+export const OpenAIChatToolCallDelta = Schema.Struct({
  index: optionalNull(Schema.Number),
  id: optionalNull(Schema.String),
  function: optionalNull(OpenAIChatToolCallDeltaFunction),
@@ -246,7 +246,7 @@ const OpenAIChatToolCallDelta = Schema.Struct({
 })
 type OpenAIChatToolCallDelta = Schema.Schema.Type<typeof OpenAIChatToolCallDelta>

-const OpenAIChatDelta = Schema.StructWithRest(
+export const OpenAIChatDelta = Schema.StructWithRest(
  Schema.Struct({
    content: optionalNull(Schema.String),
    refusal: optionalNull(Schema.String),
@@ -259,7 +259,7 @@ const OpenAIChatDelta = Schema.StructWithRest(
  [Schema.Record(Schema.String, Schema.Unknown)],
 )

-const OpenAIChatChoice = Schema.StructWithRest(
+export const OpenAIChatChoice = Schema.StructWithRest(
  Schema.Struct({
    delta: optionalNull(OpenAIChatDelta),
    finish_reason: optionalNull(Schema.String),
@@ -326,6 +326,8 @@ export interface ParserState {
 interface LoweringOptions {
  readonly cacheControl?: (cache: CacheHint | undefined) => OpenAIChatCacheControl | undefined
  readonly toolCallID?: (id: string) => string
+  /** Project provider-specific fields from the exact source, even when other messages are dropped during lowering. */
+  readonly assistant?: (source: LLMRequest["messages"][number], message: OpenAIChatMessage) => OpenAIChatMessage
 }

 const lowerTool = (tool: ToolDefinition, options: LoweringOptions, supportsStrictMode: boolean): OpenAIChatTool => ({
@@ -360,7 +362,7 @@ const lowerToolCall = (
  extra_content: decodeExtraContent(part.providerMetadata?.[options.providerMetadataKey]?.extraContent),
 })

-const lowerMedia = Effect.fn("OpenAIChat.lowerMedia")(function* (part: MediaPart) {
+const lowerMedia = Effect.fnUntraced(function* (part: MediaPart) {
  // Chat Completions accepts PDFs, and no other documents, as inline `file` parts; file URLs are not supported.
  if (part.media.mediaType.toLowerCase() === "application/pdf")
    return {
@@ -406,7 +408,7 @@ const lowerReasoningDetail = (detail: ReasoningDetail) => {

 const isKimiDetail = (detail: { readonly type: string }) => detail.type === "summary" || detail.type === "encrypted"

-const lowerUserMessage = Effect.fn("OpenAIChat.lowerUserMessage")(function* (
+const lowerUserMessage = Effect.fnUntraced(function* (
  message: OpenAIChatRequestMessage,
  options: LoweringOptions,
 ) {
@@ -430,7 +432,7 @@ const lowerUserMessage = Effect.fn("OpenAIChat.lowerUserMessage")(function* (
  return { role: "user" as const, content }
 })

-const lowerAssistantMessage = Effect.fn("OpenAIChat.lowerAssistantMessage")(function* (
+const lowerAssistantMessage = Effect.fnUntraced(function* (
  message: OpenAIChatRequestMessage,
  configuredField: string | undefined,
  requireReasoning: boolean,
@@ -495,7 +497,7 @@ const lowerAssistantMessage = Effect.fn("OpenAIChat.lowerAssistantMessage")(func
  return { ...result, [field]: reasoningText }
 })

-const lowerToolMessages = Effect.fn("OpenAIChat.lowerToolMessages")(function* (
+const lowerToolMessages = Effect.fnUntraced(function* (
  message: OpenAIChatRequestMessage,
  options: LoweringOptions,
 ) {
@@ -532,19 +534,21 @@ const toolMessage = (toolCallID: string, text: string, cacheControl: OpenAIChatC
  content: cacheControl === undefined ? text : [{ type: "text" as const, text, cache_control: cacheControl }],
 })

-const lowerMessage = Effect.fn("OpenAIChat.lowerMessage")(function* (
+const lowerMessage = Effect.fnUntraced(function* (
  message: OpenAIChatRequestMessage,
  reasoningField: string | undefined,
  requireReasoning: boolean,
  options: LoweringOptions & { readonly providerMetadataKey: string },
 ) {
  if (message.role === "user") return [yield* lowerUserMessage(message, options)]
-  if (message.role === "assistant")
-    return [yield* lowerAssistantMessage(message, reasoningField, requireReasoning, options)]
+  if (message.role === "assistant") {
+    const lowered = yield* lowerAssistantMessage(message, reasoningField, requireReasoning, options)
+    return [options.assistant?.(message, lowered) ?? lowered]
+  }
  return (yield* lowerToolMessages(message, options)).messages
 })

-const lowerMessages = Effect.fn("OpenAIChat.lowerMessages")(function* (request: LLMRequest, options: LoweringOptions) {
+const lowerMessages = Effect.fnUntraced(function* (request: LLMRequest, options: LoweringOptions) {
  const system: OpenAIChatMessage[] =
    request.system.length === 0
      ? []
@@ -855,7 +859,7 @@ export const fromRequest = Effect.fn("OpenAIChat.fromRequest")(function* (
 // Streaming parsers are small state machines: every event returns a new state
 // plus the common `LLMEvent`s produced by that event. Tool calls are accumulated
 // because OpenAI streams JSON arguments across multiple deltas.
-const mapFinishReason = Effect.fn("OpenAIChat.mapFinishReason")(function* (event: OpenAIChatEvent, reason: string) {
+const mapFinishReason = Effect.fnUntraced(function* (event: OpenAIChatEvent, reason: string) {
  switch (reason) {
    case "error":
      return yield* new AIError({
@@ -1214,7 +1218,7 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
    ] as const
  })

-const finishEvents = Effect.fn("OpenAIChat.finishEvents")(function* (state: ParserState) {
+export const finishEvents = Effect.fnUntraced(function* (state: ParserState) {
  if (state.finishReason === undefined && state.requireFinishReason)
    return yield* new AIError({
      reason: new InvalidProviderOutputError({
@@ -208,7 +208,7 @@ const eventImage = (frame: string, label: string, data: string, format: string,
    info: info(format, size),
  })

-const onEvent = Effect.fn("OpenAIImages.onEvent")(function* (state: State, frame: string) {
+const onEvent = Effect.fnUntraced(function* (state: State, frame: string) {
  const event = yield* decodeEvent(frame)
  const format = event.output_format
  if ("partial_image_index" in event) {
@@ -229,7 +229,7 @@ const onEvent = Effect.fn("OpenAIImages.onEvent")(function* (state: State, frame
  ] as const
 })

-const onDocument = Effect.fn("OpenAIImages.onDocument")(function* (frame: Exclude<Frame, string>) {
+const onDocument = Effect.fnUntraced(function* (frame: Exclude<Frame, string>) {
  const invalid = (message: string, cause?: unknown) => route.frameError(message, frame.document, cause)
  const decoded = yield* decodeDocument(frame.document).pipe(
    Effect.mapError((cause) => invalid(`${route.name} returned an invalid response`, cause)),
@@ -157,7 +157,7 @@ const nativeImageTool = (tool: ToolDefinition) => {
  return Schema.is(OpenAIResponsesImageGenerationTool)(native) ? native : undefined
 }

-const lowerTool = Effect.fn("OpenAIResponses.lowerTool")(function* (tool: ToolDefinition) {
+const lowerTool = Effect.fnUntraced(function* (tool: ToolDefinition) {
  const native = nativeImageToolInput(tool)
  if (native !== undefined) {
    if (Schema.is(OpenAIResponsesImageGenerationTool)(native)) return native
@@ -168,7 +168,7 @@ const lowerTool = Effect.fn("OpenAIResponses.lowerTool")(function* (tool: ToolDe

 // Native namespaces hold only function tools, so deeper levels flatten into
 // the leaf names the same way non-native protocols flatten the whole tree.
-const lowerToolEntry = Effect.fn("OpenAIResponses.lowerToolEntry")(function* (tool: ToolEntry) {
+const lowerToolEntry = Effect.fnUntraced(function* (tool: ToolEntry) {
  if (tool.type === "tool") return yield* lowerTool(tool)
  // OpenAI requires a namespace description; fall back to a generic one so a
  // missing description never blocks the request.
@@ -237,7 +237,7 @@ const checkpointBody = {
  }),
 }

-const hostedToolResult = Effect.fn("OpenAIResponses.hostedToolResult")(function* (item: ResponsesHostedTools.Item) {
+const hostedToolResult = Effect.fnUntraced(function* (item: ResponsesHostedTools.Item) {
  const isError = item.error !== undefined && item.error !== null
  if (item.type === "image_generation_call" && item.result) {
    yield* Effect.fromResult(Encoding.decodeBase64(item.result)).pipe(
@@ -94,7 +94,7 @@ const fromRequest = Effect.fn("OpenAISpeech.fromRequest")(function* (request: Me

 const isSse = (body: MediaProtocol.Body) => body.type === "json" && body.value.stream_format === "sse"

-const onEvent = Effect.fn("OpenAISpeech.onEvent")(function* (state: State, frame: string) {
+const onEvent = Effect.fnUntraced(function* (state: State, frame: string) {
  const event = yield* decodeEvent(frame)
  if (event.type === "speech.audio.delta") return SpeechStream.delta(state, event.audio)
  const usage = event.usage
@@ -210,7 +210,7 @@ const segment = (value: Schema.Schema.Type<typeof Segment>): TranscriptionSegmen
  speaker: value.speaker,
 })

-const onEvent = Effect.fn("OpenAITranscription.onEvent")(function* (state: State, frame: string) {
+const onEvent = Effect.fnUntraced(function* (state: State, frame: string) {
  if (!EVENT_TYPES.has((yield* decodeEventType(frame)).type)) return [state, []] as const
  const event = yield* decodeEvent(frame)
  if (event.type === "error")
@@ -154,7 +154,7 @@ export const wrapSystemUpdate = (parts: ReadonlyArray<{ readonly text: string }>
 * raw retrieved, tool, or web content into privileged updates: keep untrusted
 * data in ordinary user/tool messages instead.
 */
-export const systemUpdateText = Effect.fn("ProviderShared.systemUpdateText")(function* (
+export const systemUpdateText = Effect.fnUntraced(function* (
  route: string,
  message: LLMRequest["messages"][number],
 ) {
@@ -167,7 +167,7 @@ export const systemUpdateText = Effect.fn("ProviderShared.systemUpdateText")(fun
 })

 /** Lower an unsupported privileged update into visible, in-order user text. */
-export const wrappedSystemUpdate = Effect.fn("ProviderShared.wrappedSystemUpdate")(function* (
+export const wrappedSystemUpdate = Effect.fnUntraced(function* (
  route: string,
  message: LLMRequest["messages"][number],
 ) {
@@ -82,7 +82,7 @@ const endpoint = (model: string) => (model.startsWith("sd3") ? "sd3" : model)

 const RESERVED_FORM_FIELDS = new Set(["image", "prompt", "mode", "model"])

-const form = Effect.fn("StabilityImages.form")(function* (
+const form = Effect.fnUntraced(function* (
  identity: MediaProtocol.Identity,
  fields: Record<string, unknown>,
  native: Record<string, unknown> | undefined,
@@ -76,7 +76,7 @@ function documentName(filename: string | undefined, names: Set<string>) {
  return name
 }

-const mediaBase64 = Effect.fn("BedrockMedia.mediaBase64")(function* (part: MediaPart) {
+const mediaBase64 = Effect.fnUntraced(function* (part: MediaPart) {
  const media = yield* ProviderShared.requireInlineMedia("Bedrock Converse", part.media)
  const bytes = yield* Effect.fromResult(Encoding.decodeBase64(media.base64)).pipe(
    Effect.mapError((cause) =>
@@ -91,7 +91,7 @@ const mediaBase64 = Effect.fn("BedrockMedia.mediaBase64")(function* (part: Media
 // document block. Image MIME types not in `IMAGE_FORMATS` (e.g. `image/svg+xml`)
 // get an image-specific error so the caller knows it's a format-support issue,
 // not a kind-detection issue.
-export const lower = Effect.fn("BedrockMedia.lower")(function* (part: MediaPart, documentNames: Set<string>) {
+export const lower = Effect.fnUntraced(function* (part: MediaPart, documentNames: Set<string>) {
  const mime = part.media.mediaType.toLowerCase()
  const imageFormat = IMAGE_FORMATS[mime as keyof typeof IMAGE_FORMATS]
  if (imageFormat) {
@@ -11,7 +11,7 @@ interface State {
  readonly responseID?: string
 }

-const onOutputItem = Effect.fn("ResponsesCheckpoint.onOutputItem")(function* (
+const onOutputItem = Effect.fnUntraced(function* (
  state: State,
  input: OpenResponses.Event,
 ) {
@@ -63,7 +63,7 @@ export const make = <Body>(body: RouteBody<Body>): TriggerCompactOperation =>
          checkpoints: {},
        }),
        terminal: OpenResponses.terminal,
-        step: Effect.fn("ResponsesCheckpoint.step")(function* (state: State, event: OpenResponses.Event) {
+        step: Effect.fnUntraced(function* (state: State, event: OpenResponses.Event) {
          if (event.response?.id && state.responseID && event.response.id !== state.responseID)
            return yield* ProviderShared.eventError(source.id, "Compaction response ID changed during execution")
          if (event.type === "response.created") return [{ ...state, responseID: event.response?.id }, []] as const
@@ -33,7 +33,7 @@ export const onDone: (
  state: OpenResponses.ParserState,
  item: Item,
  tools: Definitions,
-) => Effect.Effect<OpenResponses.StepResult, AIError> = Effect.fn("ResponsesHostedTools.onDone")(
+) => Effect.Effect<OpenResponses.StepResult, AIError> = Effect.fnUntraced(
  function* (state, item, tools) {
    const tool = tools[item.type]
    if (!tool) return [state, []] satisfies OpenResponses.StepResult
@@ -60,14 +60,21 @@ const inputStart = (tool: PendingTool) =>
    providerMetadata: tool.providerMetadata,
  })

-const inputDelta = (tool: PendingTool, text: string) =>
-  LLMEvent.toolInputDelta({
-    id: tool.id,
-    name: tool.name,
-    namespace: tool.namespace,
-    text,
-    input: Option.getOrElse(parsePartialInput(tool.input), () => ({})),
-  })
+const inputDelta = (tool: PendingTool, text: string): LLMEvent => {
+  const raw = tool.input
+  let parsed: unknown
+  return {
+    ...LLMEvent.toolInputDelta({
+      id: tool.id,
+      name: tool.name,
+      namespace: tool.namespace,
+      text,
+    }),
+    get input() {
+      return (parsed ??= Option.getOrElse(parsePartialInput(raw), () => ({})))
+    },
+  }
+}

 const toolCall = (route: string, tool: PendingTool, inputOverride?: string) => {
  const raw = inputOverride ?? tool.input
@@ -0,0 +1,374 @@
+import { Effect, Schema } from "effect"
+import { Protocol } from "../route/protocol.js"
+import { AIError, LLMEvent, type LanguageModelCompatibility, type LLMRequest } from "../schema/index.js"
+import { classifyProviderFailure } from "../provider-error.js"
+import { OpenAIChat } from "./openai-chat.js"
+import { JsonObject, optionalArray, optionalNull, ProviderShared } from "./shared.js"
+import { cacheControl } from "./utils/cache.js"
+
+// ---------------------------------------------------------------------------
+// Public options and request body
+// ---------------------------------------------------------------------------
+
+export type ReasoningEffort = "none" | "minimal" | "low" | "medium" | "high" | "xhigh" | "max" | (string & {})
+
+const Parameters = Schema.Struct({
+  enableWebSearch: Schema.optional(Schema.String),
+  enableWebScraping: Schema.optional(Schema.Boolean),
+  enableWebCitations: Schema.optional(Schema.Boolean),
+  enableXSearch: Schema.optional(Schema.Boolean),
+  stripThinkingResponse: Schema.optional(Schema.Boolean),
+  disableThinking: Schema.optional(Schema.Boolean),
+  includeVeniceSystemPrompt: Schema.optional(Schema.Boolean),
+  characterSlug: Schema.optional(Schema.String),
+  includeSearchResultsInStream: Schema.optional(Schema.Boolean),
+  returnSearchResultsAsDocuments: Schema.optional(Schema.Boolean),
+})
+
+const Reasoning = Schema.Struct({
+  effort: Schema.optional(Schema.String),
+  enabled: Schema.optional(Schema.Boolean),
+  summary: Schema.optional(Schema.String),
+})
+
+export type OptionsInput = {
+  readonly reasoningEffort?: ReasoningEffort
+  readonly reasoning?: {
+    readonly effort?: ReasoningEffort
+    readonly enabled?: boolean
+    readonly summary?: "auto" | "concise" | "detailed" | (string & {})
+  }
+  readonly veniceParameters?: Omit<typeof Parameters.Type, "enableWebSearch"> & {
+    readonly enableWebSearch?: "off" | "on" | "auto" | (string & {})
+  }
+  readonly promptCacheKey?: string
+  readonly promptCacheRetention?: "default" | "extended" | "24h" | (string & {})
+  readonly parallelToolCalls?: boolean
+  readonly maxCompletionTokens?: number
+  readonly maxTokens?: number
+  readonly minP?: number
+  readonly repetitionPenalty?: number
+  readonly stopTokenIds?: readonly number[]
+  readonly logprobs?: boolean
+  readonly topLogprobs?: number
+  readonly maxTemp?: number
+  readonly minTemp?: number
+  readonly responseFormat?: Readonly<Record<string, unknown>>
+  readonly user?: string
+}
+
+const Options = Schema.Struct({
+  reasoningEffort: Schema.optional(Schema.String),
+  reasoning: Schema.optional(Reasoning),
+  veniceParameters: Schema.optional(Parameters),
+  promptCacheKey: Schema.optional(Schema.String),
+  promptCacheRetention: Schema.optional(Schema.String),
+  parallelToolCalls: Schema.optional(Schema.Boolean),
+  maxCompletionTokens: Schema.optional(Schema.Number),
+  maxTokens: Schema.optional(Schema.Number),
+  minP: Schema.optional(Schema.Number),
+  repetitionPenalty: Schema.optional(Schema.Number),
+  stopTokenIds: Schema.optional(Schema.Array(Schema.Number)),
+  logprobs: Schema.optional(Schema.Boolean),
+  topLogprobs: Schema.optional(Schema.Number),
+  maxTemp: Schema.optional(Schema.Number),
+  minTemp: Schema.optional(Schema.Number),
+  responseFormat: Schema.optional(JsonObject),
+  user: Schema.optional(Schema.String),
+})
+
+const ToolCall = Schema.Struct({
+  ...OpenAIChat.OpenAIChatAssistantToolCall.fields,
+  thought_signature: Schema.optional(Schema.String),
+})
+const Assistant = Schema.StructWithRest(
+  Schema.Struct({
+    ...OpenAIChat.OpenAIChatMessage.cases.assistant.schema.fields,
+    tool_calls: optionalArray(ToolCall),
+    thought_signature: Schema.optional(Schema.String),
+  }),
+  [Schema.Record(Schema.String, Schema.Unknown)],
+)
+const Messages = Schema.Array(
+  Schema.Union([
+    OpenAIChat.OpenAIChatMessage.cases.system,
+    OpenAIChat.OpenAIChatMessage.cases.user,
+    Assistant,
+    OpenAIChat.OpenAIChatMessage.cases.tool,
+  ]),
+)
+const Body = Schema.Struct({
+  ...OpenAIChat.bodyFields,
+  messages: Messages,
+  reasoning: Schema.optional(Reasoning),
+  venice_parameters: Schema.Record(Schema.String, Schema.Union([Schema.String, Schema.Boolean])),
+  prompt_cache_retention: Options.fields.promptCacheRetention,
+  parallel_tool_calls: Options.fields.parallelToolCalls,
+  min_p: Options.fields.minP,
+  top_k: Schema.optional(Schema.Number),
+  repetition_penalty: Options.fields.repetitionPenalty,
+  stop_token_ids: Options.fields.stopTokenIds,
+  logprobs: Options.fields.logprobs,
+  top_logprobs: Options.fields.topLogprobs,
+  max_temp: Options.fields.maxTemp,
+  min_temp: Options.fields.minTemp,
+  response_format: Options.fields.responseFormat,
+  user: Options.fields.user,
+})
+
+// ---------------------------------------------------------------------------
+// Streaming schemas and state
+// ---------------------------------------------------------------------------
+
+const ToolDelta = Schema.Struct({
+  ...OpenAIChat.OpenAIChatToolCallDelta.fields,
+  thought_signature: optionalNull(Schema.String),
+})
+const Delta = Schema.StructWithRest(
+  Schema.Struct({
+    ...OpenAIChat.OpenAIChatDelta.schema.fields,
+    tool_calls: optionalNull(Schema.Array(ToolDelta)),
+    thought_signature: optionalNull(Schema.String),
+  }),
+  [Schema.Record(Schema.String, Schema.Unknown)],
+)
+const Choice = Schema.StructWithRest(
+  Schema.Struct({ ...OpenAIChat.OpenAIChatChoice.schema.fields, delta: optionalNull(Delta) }),
+  [Schema.Record(Schema.String, Schema.Unknown)],
+)
+const Usage = Schema.StructWithRest(
+  Schema.Struct({
+    ...OpenAIChat.OpenAIChatUsage.schema.fields,
+    prompt_tokens_details: optionalNull(
+      Schema.StructWithRest(
+        Schema.Struct({
+          cached_tokens: optionalNull(Schema.Number),
+          cache_write_tokens: optionalNull(Schema.Number),
+          cache_creation_input_tokens: optionalNull(Schema.Number),
+        }),
+        [Schema.Record(Schema.String, Schema.Unknown)],
+      ),
+    ),
+  }),
+  [Schema.Record(Schema.String, Schema.Unknown)],
+)
+const Event = Schema.StructWithRest(
+  Schema.Struct({
+    ...OpenAIChat.OpenAIChatEvent.schema.fields,
+    choices: optionalNull(Schema.Array(Choice)),
+    usage: optionalNull(Usage),
+    error: optionalNull(Schema.Union([Schema.String, OpenAIChat.OpenAIChatEvent.schema.fields.error.schema])),
+    issues: optionalArray(
+      Schema.Struct({
+        message: Schema.String,
+        path: Schema.optional(Schema.Array(Schema.Union([Schema.String, Schema.Number]))),
+      }),
+    ),
+  }),
+  [Schema.Record(Schema.String, Schema.Unknown)],
+)
+
+interface State {
+  readonly shared: OpenAIChat.ParserState
+  readonly pending: string
+  readonly reasoning: string
+  readonly encrypted: boolean
+  readonly signature?: string
+  readonly tools: Readonly<Record<string, string>>
+}
+
+const MARKER = "__ENCRYPTED_REASONING__"
+
+// ---------------------------------------------------------------------------
+// Request lowering
+// ---------------------------------------------------------------------------
+
+const fromRequest = Effect.fn("VeniceChat.fromRequest")(function* (request: LLMRequest) {
+  const options = yield* ProviderShared.validateWith(Schema.decodeUnknownEffect(Options))(request.providerOptions ?? {})
+  const body = yield* OpenAIChat.fromRequest(request, {
+    cacheControl: cacheControl(),
+    assistant: (source, message) => {
+      if (message.role !== "assistant") return message
+      const parts = source.content.filter(
+        (part) => part.type === "text" || part.type === "reasoning" || part.type === "tool-call",
+      )
+      const calls = source.content.filter((part) => part.type === "tool-call")
+      const signature = parts
+        .map((part) => part.providerMetadata?.venice?.messageThoughtSignature)
+        .find((value) => typeof value === "string")
+      const raw = parts
+        .map((part) => part.providerMetadata?.venice?.encryptedReasoningContent)
+        .find((value) => typeof value === "string")
+      return {
+        ...message,
+        ...(signature === undefined ? {} : { thought_signature: signature }),
+        ...(raw === undefined ? {} : { reasoning_content: raw }),
+        tool_calls: message.tool_calls?.map((call, index) => {
+          const signature = calls[index]?.providerMetadata?.venice?.thoughtSignature
+          return { ...call, ...(typeof signature === "string" ? { thought_signature: signature } : {}) }
+        }),
+      }
+    },
+  })
+  return {
+    ...body,
+    max_completion_tokens: options.maxCompletionTokens ?? options.maxTokens ?? request.generation?.maxTokens,
+    reasoning_effort: undefined,
+    reasoning:
+      options.reasoningEffort === undefined
+        ? options.reasoning
+        : { ...options.reasoning, effort: options.reasoningEffort },
+    // Match the previous Venice SDK default, not the gateway's added prompt.
+    venice_parameters: Object.fromEntries(
+      Object.entries({
+        ...options.veniceParameters,
+        includeVeniceSystemPrompt: options.veniceParameters?.includeVeniceSystemPrompt ?? false,
+      })
+        .filter(([, value]) => value !== undefined)
+        .map(([key, value]) => [key.replace(/[A-Z]/g, (letter) => `_${letter.toLowerCase()}`), value]),
+    ),
+    prompt_cache_retention: options.promptCacheRetention,
+    parallel_tool_calls: options.parallelToolCalls,
+    min_p: options.minP,
+    top_k: request.generation?.topK,
+    repetition_penalty: options.repetitionPenalty,
+    stop_token_ids: options.stopTokenIds,
+    logprobs: options.logprobs,
+    top_logprobs: options.topLogprobs,
+    max_temp: options.maxTemp,
+    min_temp: options.minTemp,
+    response_format: options.responseFormat,
+    user: options.user,
+  }
+})
+
+// ---------------------------------------------------------------------------
+// Venice normalization around the shared Chat state machine
+// ---------------------------------------------------------------------------
+
+const step = Effect.fn("VeniceChat.step")(function* (state: State, event: typeof Event.Type) {
+  if (typeof event.error === "string")
+    return yield* new AIError({
+      reason: classifyProviderFailure({
+        message: [
+          event.error,
+          ...(event.issues ?? []).map(
+            (issue) => `${issue.path?.length ? `${issue.path.join(".")}: ` : ""}${issue.message}`,
+          ),
+        ].join("; "),
+        rawBody: ProviderShared.encodeJson(event),
+      }),
+    })
+  const delta = event.choices?.[0]?.delta
+  const scalar = delta?.reasoning_content ?? ""
+  const text = state.pending + scalar
+  const marker = text.indexOf(MARKER)
+  const pending =
+    marker >= 0 || state.encrypted
+      ? 0
+      : (Array.from({ length: Math.min(text.length, MARKER.length - 1) }, (_, index) => index + 1)
+          .filter((length) => text.endsWith(MARKER.slice(0, length)))
+          .at(-1) ?? 0)
+  const visible = state.encrypted ? "" : marker >= 0 ? text.slice(0, marker) : text.slice(0, text.length - pending)
+  const result = yield* OpenAIChat.protocol.stream.step(state.shared, {
+    ...event,
+    error: event.error,
+    usage: event.usage
+      ? {
+          ...event.usage,
+          prompt_tokens_details: event.usage.prompt_tokens_details
+            ? {
+                ...event.usage.prompt_tokens_details,
+                cache_write_tokens:
+                  event.usage.prompt_tokens_details.cache_write_tokens ??
+                  event.usage.prompt_tokens_details.cache_creation_input_tokens,
+              }
+            : event.usage.prompt_tokens_details,
+        }
+      : event.usage,
+    choices: event.choices?.map((choice, index) =>
+      index === 0 && choice.delta
+        ? {
+            ...choice,
+            delta: {
+              ...choice.delta,
+              reasoning_content: visible || undefined,
+              // Opaque-only scalar reasoning still needs a canonical part for replay.
+              reasoning_details: choice.delta.reasoning_details ?? (marker >= 0 ? [] : undefined),
+            },
+          }
+        : choice,
+    ),
+  })
+  const tools = { ...state.tools }
+  for (const call of delta?.tool_calls ?? []) {
+    if (!call.thought_signature) continue
+    const index = call.index ?? result[0].latestToolIndex
+    const id =
+      call.id ?? (index === undefined ? undefined : (result[0].tools[index]?.id ?? result[0].pendingTools[index]?.id))
+    if (id) tools[id] = call.thought_signature
+  }
+  return [
+    {
+      shared: result[0],
+      pending: pending ? text.slice(-pending) : "",
+      reasoning: state.reasoning + scalar,
+      encrypted: state.encrypted || marker >= 0,
+      signature: delta?.thought_signature ?? state.signature,
+      tools,
+    },
+    result[1],
+  ] as const
+})
+
+const onHalt = Effect.fn("VeniceChat.onHalt")(function* (state: State) {
+  const events = yield* OpenAIChat.finishEvents(state.shared)
+  return events.flatMap((event): LLMEvent[] => {
+    if (
+      event.type !== "reasoning-end" &&
+      event.type !== "text-end" &&
+      event.type !== "tool-call" &&
+      event.type !== "tool-input-end"
+    )
+      return [event]
+    const signature = event.type === "tool-call" || event.type === "tool-input-end" ? state.tools[event.id] : undefined
+    const providerMetadata = {
+      ...event.providerMetadata,
+      venice: {
+        ...event.providerMetadata?.venice,
+        ...(state.signature ? { messageThoughtSignature: state.signature } : {}),
+        ...(signature ? { thoughtSignature: signature } : {}),
+        ...(event.type === "reasoning-end" && state.encrypted ? { encryptedReasoningContent: state.reasoning } : {}),
+      },
+    }
+    if (event.type === "reasoning-end" && state.pending)
+      return [LLMEvent.reasoningDelta({ id: event.id, text: state.pending }), { ...event, providerMetadata }]
+    return [{ ...event, providerMetadata }]
+  })
+})
+
+export const compatibility = {
+  maxTokensField: "max_completion_tokens",
+  supportsStore: false,
+  supportsPromptCacheKey: true,
+} satisfies LanguageModelCompatibility
+
+export const protocol = Protocol.make({
+  id: "venice-chat",
+  body: { schema: Body, from: fromRequest },
+  stream: {
+    event: Schema.Union([Schema.Literal("[DONE]"), Protocol.jsonEvent(Event)]),
+    initial: (request): State => ({
+      shared: OpenAIChat.protocol.stream.initial(request),
+      pending: "",
+      reasoning: "",
+      encrypted: false,
+      tools: {},
+    }),
+    step: (state: State, event) => (event === "[DONE]" ? Effect.succeed([state, []] as const) : step(state, event)),
+    terminal: (event) => event === "[DONE]",
+    onHalt,
+  },
+})
+
+export * as VeniceChat from "./venice-chat.js"
@@ -1,15 +1,20 @@
 import { Route, type RouteDefaultsInput } from "../route/client.js"
 import { Endpoint } from "../route/endpoint.js"
 import type { ProviderPackage } from "../provider-package.js"
+import { AnthropicMessages } from "../protocols/anthropic-messages.js"
 import { OpenAIChat } from "../protocols/openai-chat.js"
 import { OpenResponses } from "../protocols/open-responses.js"
 import { BedrockAuth, type Credentials } from "../protocols/utils/bedrock-auth.js"
+import { claudeVersion } from "../protocols/utils/claude-model.js"
 import { ProviderConfigurationError, ProviderID, type ModelID } from "../schema/index.js"
 import { withOpenAIOptions, type OpenAIProviderOptionsInput } from "./openai-options.js"

 export const id = ProviderID.make("amazon-bedrock")

-export type Config = RouteDefaultsInput & {
+export type OpenAIOptionsInput = OpenAIProviderOptionsInput
+export type MessagesOptionsInput = AnthropicMessages.ProviderOptionsInput
+
+export type Config = Omit<RouteDefaultsInput, "providerOptions"> & {
  /** Bedrock API key. Falls back to `AWS_BEARER_TOKEN_BEDROCK`; bearer auth takes precedence over SigV4. */
  readonly apiKey?: string
  /** `sigv4` ignores `apiKey` fallbacks from the environment; `bearer` requires a token. */
@@ -20,11 +25,11 @@ export type Config = RouteDefaultsInput & {
  /** Shared config profile for the default credential chain. */
  readonly profile?: string
  readonly region?: string
-  readonly providerOptions?: OpenAIProviderOptionsInput
+  readonly providerOptions?: OpenAIProviderOptionsInput | AnthropicMessages.ProviderOptionsInput
 }

-export type Settings = ProviderPackage.Settings &
-  OpenAIProviderOptionsInput & {
+export type Settings<Options = OpenAIProviderOptionsInput> = ProviderPackage.Settings &
+  Options & {
    readonly apiKey?: string
    readonly auth?: "bearer" | "sigv4"
    readonly baseURL?: string
@@ -34,6 +39,8 @@ export type Settings = ProviderPackage.Settings &
    readonly topP?: number
  }

+export type MessagesSettings = Settings<AnthropicMessages.ProviderOptionsInput>
+
 const responsesRoute = Route.make({
  id: "bedrock-mantle-responses",
  provider: id,
@@ -50,12 +57,35 @@ const chatRoute = OpenAIChat.route.with({
  providerMetadataKey: "mantle",
 })

-export const routes = [responsesRoute, chatRoute]
+const messagesRoute = Route.make({
+  id: "bedrock-mantle-messages",
+  provider: id,
+  providerMetadataKey: "mantle",
+  protocol: {
+    ...AnthropicMessages.protocol,
+    // Mantle rejects mid-conversation `output_config` on Opus 5.0; support starts at 5.1+.
+    supportsEffortUpdates: (request) => {
+      const override = request.model.compatibility?.supportsEffortUpdates
+      if (override !== undefined) return override
+      const version = claudeVersion(request.model.id)
+      return version !== undefined && (version.major > 5 || (version.major === 5 && version.minor >= 1))
+    },
+  },
+  endpoint: Endpoint.path(AnthropicMessages.PATH),
+  transport: AnthropicMessages.transport<AnthropicMessages.AnthropicMessagesBody>(),
+  headers: () => ({ "anthropic-version": "2023-06-01" }),
+})

-const configuredRoute = <Body, Prepared>(route: Route<Body, Prepared>, input: Config) => {
+export const routes = [responsesRoute, chatRoute, messagesRoute]
+
+const configuredRoute = <Body, Prepared>(
+  route: Route<Body, Prepared>,
+  input: Config,
+  defaultBaseURL = (region: string) => `https://bedrock-mantle.${region}.api.aws/v1`,
+) => {
  const region = BedrockAuth.resolveRegion(input)
  return route.with({
-    endpoint: { baseURL: input.baseURL ?? `https://bedrock-mantle.${region}.api.aws/v1` },
+    endpoint: { baseURL: input.baseURL ?? defaultBaseURL(region) },
    auth: BedrockAuth.resolveAuth(input, region, {
      service: "bedrock-mantle",
      name: "Bedrock Mantle",
@@ -87,6 +117,11 @@ export const configure = (input: Config = {}) => {
    })
  const configuredResponsesRoute = configuredRoute(responsesRoute, input)
  const configuredChatRoute = configuredRoute(chatRoute, input)
+  const configuredMessagesRoute = configuredRoute(
+    messagesRoute,
+    input,
+    (region) => `https://bedrock-mantle.${region}.api.aws/anthropic/v1`,
+  )
  const modelDefaults = defaults(input)
  const responses = (modelID: string | ModelID) =>
    configuredResponsesRoute
@@ -96,11 +131,14 @@ export const configure = (input: Config = {}) => {
    configuredChatRoute
      .with(withOpenAIOptions(modelID, modelDefaults))
      .model<OpenAIProviderOptionsInput>({ id: modelID })
+  const messages = (modelID: string | ModelID) =>
+    configuredMessagesRoute.with(modelDefaults).model<AnthropicMessages.ProviderOptionsInput>({ id: modelID })

  return {
    id,
    model: responses,
    chat,
+    messages,
    responses,
    configure,
  }
@@ -119,7 +157,7 @@ const fromSettings = ({
  region,
  topP,
  ...providerOptions
-}: Settings) =>
+}: Settings<Config["providerOptions"]>) =>
  configure({
    apiKey,
    auth,
@@ -137,6 +175,10 @@ export const chatModel: ProviderPackage.Definition<Settings, OpenAIProviderOptio
  modelID,
  settings,
 ) => fromSettings(settings).chat(modelID)
+export const messagesModel: ProviderPackage.Definition<
+  MessagesSettings,
+  AnthropicMessages.ProviderOptionsInput
+>["model"] = (modelID, settings) => fromSettings(settings).messages(modelID)
 export const responsesModel: ProviderPackage.Definition<Settings, OpenAIProviderOptionsInput>["model"] = (
  modelID,
  settings,
@@ -0,0 +1,2 @@
+export { messagesModel as model } from "../../amazon-bedrock-mantle.js"
+export type { MessagesSettings as Settings } from "../../amazon-bedrock-mantle.js"
@@ -40,6 +40,7 @@ export * as Stability from "./stability.js"
 export * as TogetherAI from "./togetherai.js"
 export * as TypeSafeAI from "./typesafe-ai.js"
 export * as VercelAIGateway from "./vercel-ai-gateway.js"
+export * as Venice from "./venice.js"
 export * as XAI from "./xai.js"
 export * as ZAI from "./zai.js"
 export * as ZAICodingPlan from "./zai-coding-plan.js"
@@ -50,7 +50,7 @@ export const gpt5DefaultOptions = (modelID: string): ProviderOptions | undefined
 export const openAIDefaultOptions = (modelID: string): ProviderOptions | undefined =>
  mergeProviderOptions(openAIProviderOptions({ store: false }), gpt5DefaultOptions(modelID))

-export const withOpenAIOptions = <Options extends { readonly providerOptions?: OpenAIProviderOptionsInput }>(
+export const withOpenAIOptions = <Options extends { readonly providerOptions?: ProviderOptions }>(
  modelID: string,
  options: Options,
 ): Omit<Options, "providerOptions"> & { readonly providerOptions?: ProviderOptions } => {
@@ -0,0 +1,62 @@
+import type { ProviderPackage } from "../provider-package.js"
+import { VeniceChat } from "../protocols/venice-chat.js"
+import { OpenAIChat } from "../protocols/openai-chat.js"
+import { AuthOptions, type ProviderAuthOption } from "../route/auth-options.js"
+import { Route, type RouteDefaultsInput } from "../route/client.js"
+import { Endpoint } from "../route/endpoint.js"
+import { ProviderID, type ModelID } from "../schema/index.js"
+
+export const id = ProviderID.make("venice")
+export type ChatOptionsInput = VeniceChat.OptionsInput
+export type Config = Omit<RouteDefaultsInput, "providerOptions"> &
+  ProviderAuthOption<"optional"> & {
+    readonly baseURL?: string
+    readonly queryParams?: Readonly<Record<string, string>>
+    readonly providerOptions?: ChatOptionsInput
+  }
+export type Settings = ProviderPackage.Settings &
+  ChatOptionsInput & {
+    readonly apiKey?: string
+    readonly baseURL?: string
+    readonly queryParams?: Readonly<Record<string, string>>
+  }
+
+const route = Route.make({
+  id: "venice-chat",
+  provider: id,
+  providerMetadataKey: "venice",
+  protocol: VeniceChat.protocol,
+  endpoint: Endpoint.path("/chat/completions", { baseURL: "https://api.venice.ai/api/v1" }),
+  framing: OpenAIChat.framing,
+})
+export const routes = [route]
+
+export const configure = (input: Config = {}) => {
+  const { apiKey: _apiKey, auth: _auth, baseURL, queryParams, ...rest } = input
+  const chat = (modelID: string | ModelID) =>
+    route
+      .with({
+        ...rest,
+        endpoint: { baseURL: baseURL ?? route.endpoint.baseURL, query: queryParams },
+        auth: AuthOptions.bearer(input, "VENICE_API_KEY"),
+      })
+      .model<ChatOptionsInput>({ id: modelID, compatibility: VeniceChat.compatibility })
+  return { id, model: chat, chat, configure }
+}
+
+export const provider = configure()
+export const chat = provider.chat
+export const model: ProviderPackage.Definition<Settings, ChatOptionsInput>["model"] = (
+  modelID,
+  { apiKey, baseURL, queryParams, body, headers, ...providerOptions },
+) =>
+  configure({
+    apiKey,
+    baseURL,
+    queryParams,
+    headers,
+    http: body === undefined ? undefined : { body: { ...body } },
+    providerOptions,
+  }).model(modelID)
+
+export * as Venice from "./venice.js"
@@ -1,5 +1,5 @@
 import { Effect, Stream } from "effect"
-import { makeParser, type Event } from "effect/unstable/encoding/Sse"
+import { makeParser } from "effect/unstable/encoding/Sse"
 import { AIError, InvalidProviderOutputError } from "../schema/index.js"

 /**
@@ -42,43 +42,39 @@ export const sseFraming = (
    Stream.decodeText(),
    Stream.mapAccumEffect(
      () => {
-        const output: Event[] = []
+        const output: string[] = []
        return {
          output,
          parser: makeParser((event) => {
-            if (event._tag === "Event") output.push(event)
+            if (
+              event._tag === "Event" &&
+              (events === undefined || events.has(event.event)) &&
+              event.data.length > 0 &&
+              // Some OpenAI-compatible proxies serialize an empty flush as a bare
+              // `data: null`, between events or after `[DONE]`. No protocol has a
+              // null event, so it carries nothing and must not abort the stream.
+              event.data !== "null" &&
+              // Vertex AI partner models (e.g. `xai/grok-4.6`) send their SSE
+              // keepalive comment as `data: : keepalive` while reasoning.
+              event.data !== ": keepalive" &&
+              (event.data !== "[DONE]" || includeDone || (events !== undefined && event.event !== "message"))
+            )
+              output.push(event.data)
          }),
        }
      },
-      (state, chunk) =>
-        Effect.gen(function* () {
-          const error = state.parser.feed(chunk)
-          if (error)
-            return yield* new AIError({
-              reason: new InvalidProviderOutputError({
-                route: "sse",
-                message: error.message,
-                body: chunk,
-                cause: error,
-              }),
-            })
-          return [state, state.output.splice(0)] as const
-        }),
+      (state, chunk) => {
+        const error = state.parser.feed(chunk)
+        if (!error) return Effect.succeed([state, state.output.splice(0)] as const)
+        const reason = new InvalidProviderOutputError({
+          route: "sse",
+          message: error.message,
+          body: chunk,
+          cause: error,
+        })
+        return Effect.fail(new AIError({ reason }))
+      },
    ),
-    Stream.filter(
-      (event) =>
-        (events === undefined || events.has(event.event)) &&
-        event.data.length > 0 &&
-        // Some OpenAI-compatible proxies serialize an empty flush as a bare
-        // `data: null`, between events or after `[DONE]`. No protocol has a
-        // null event, so it carries nothing and must not abort the stream.
-        event.data !== "null" &&
-        // Vertex AI partner models (e.g. `xai/grok-4.6`) send their SSE
-        // keepalive comment as `data: : keepalive` while reasoning.
-        event.data !== ": keepalive" &&
-        (event.data !== "[DONE]" || includeDone || (events !== undefined && event.event !== "message")),
-    ),
-    Stream.map((event) => event.data),
  )

 /** Server-Sent Events framing. Used by every JSON-streaming HTTP provider. */
@@ -1,13 +1,12 @@
 import { describe, expect, test } from "bun:test"
 import { Effect } from "effect"
-import { LLM, LLMRequest, Message, ToolCallPart } from "../src/index.js"
+import { LLM, Message, ToolCallPart } from "../src/index.js"
 import { Auth, LLMClient } from "../src/route.js"
 import { compileRequest } from "../src/route/client.js"
 import { AnthropicMessages } from "../src/protocols/anthropic-messages.js"
 import { OpenAIResponses } from "../src/protocols/openai-responses.js"
 import { Gemini } from "../src/protocols/gemini.js"
-import { GoogleVertexMessages, OpenAI } from "../src/providers.js"
-import { applyCachePolicy } from "../src/cache-policy.js"
+import { AmazonBedrockMantle, GoogleVertexMessages, OpenAI } from "../src/providers.js"
 import { applyEffortUpdates } from "../src/effort-updates.js"
 import { it, testEffect } from "./lib/effect.js"
 import { dynamicResponse } from "./lib/http.js"
@@ -172,6 +171,33 @@ describe("Anthropic Messages effort updates", () => {
    }),
  )

+  it.effect("releases a held system update next to an effort marker as one valid section", () =>
+    Effect.gen(function* () {
+      const prepared = yield* compileRequest(
+        LLM.request({
+          model: opus5,
+          messages: [
+            Message.user("Fix it."),
+            Message.assistant("Done."),
+            lowFromHigh,
+            Message.system("Update."),
+            Message.user("Next."),
+          ],
+          providerOptions: { effort: "low" },
+          cache: "none",
+        }),
+      )
+
+      expect(prepared.body.messages).toEqual([
+        { role: "user", content: [{ type: "text", text: "Fix it." }] },
+        { role: "assistant", content: [{ type: "text", text: "Done." }] },
+        { role: "system", content: [], output_config: { effort: "low" } },
+        { role: "user", content: [{ type: "text", text: "Next." }] },
+        { role: "system", content: [{ type: "text", text: "Update.", cache_control: undefined }] },
+      ])
+    }),
+  )
+
  it.effect("falls back to a plain top-level effort when history drifted from the current effort", () =>
    Effect.gen(function* () {
      const drifted = yield* compileRequest(
@@ -242,6 +268,31 @@ describe("Anthropic Messages effort updates", () => {
    }),
  )

+  it.effect("strips markers for Opus 5.0 on Bedrock Mantle Messages while lowering Opus 5.5", () =>
+    Effect.gen(function* () {
+      const mantle = AmazonBedrockMantle.configure({ apiKey: "test", region: "us-east-1" })
+      const opus50 = yield* compileRequest(
+        LLM.request({
+          model: mantle.messages("anthropic.claude-opus-5"),
+          messages: conversation,
+          providerOptions: { effort: "low" },
+        }),
+      )
+      const opus55 = yield* compileRequest(
+        LLM.request({
+          model: mantle.messages("anthropic.claude-opus-5-5"),
+          messages: conversation,
+          providerOptions: { effort: "low" },
+        }),
+      )
+
+      expect(systemMessages(opus50.body)).toHaveLength(0)
+      expect(opus50.body.output_config).toEqual({ effort: "low" })
+      expect(systemMessages(opus55.body)).toEqual([{ role: "system", content: [], output_config: { effort: "low" } }])
+      expect(opus55.body.output_config).toEqual({ effort: "high" })
+    }),
+  )
+
  it.effect("strips markers on the Vertex Anthropic route, whose protocol wrapper does not forward support", () =>
    Effect.gen(function* () {
      const prepared = yield* compileRequest(
@@ -1,29 +0,0 @@
-{
-  "version": 1,
-  "metadata": {
-    "name": "anthropic-messages/accepts-malformed-assistant-tool-order-with-default-patch",
-    "recordedAt": "2026-05-05T20:09:16.245Z",
-    "tags": ["prefix:anthropic-messages", "provider:anthropic", "protocol:anthropic-messages", "tool"]
-  },
-  "interactions": [
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"claude-haiku-4-5-20251001\",\"messages\":[{\"role\":\"assistant\",\"content\":[{\"type\":\"text\",\"text\":\"I will check the weather.\"}]},{\"role\":\"assistant\",\"content\":[{\"type\":\"tool_use\",\"id\":\"call_1\",\"name\":\"get_weather\",\"input\":{\"city\":\"Paris\"}}]},{\"role\":\"user\",\"content\":[{\"type\":\"tool_result\",\"tool_use_id\":\"call_1\",\"content\":\"{\\\"temperature\\\":\\\"72F\\\"}\"}]},{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Use that result to answer briefly.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"tools\":[{\"name\":\"get_weather\",\"description\":\"Get weather\",\"input_schema\":{\"type\":\"object\",\"properties\":{}}}],\"stream\":true,\"max_tokens\":4096}"
-      },
-      "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "text/event-stream; charset=utf-8"
-        },
-        "body": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-haiku-4-5-20251001\",\"id\":\"msg_01SikJVFaMR1XLMtavUhvuog\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":638,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":1,\"service_tier\":\"standard\",\"inference_geo\":\"not_available\"}}               }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}          }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"The\"}     }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\" weather in Paris is currently 72°F.\"}        }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0}\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":638,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":14}              }\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"             }\n\n"
-      }
-    }
-  ]
-}
@@ -1,56 +0,0 @@
-{
-  "version": 1,
-  "metadata": {
-    "name": "anthropic-messages/claude-opus-4-7-drives-a-tool-loop",
-    "recordedAt": "2026-05-03T19:59:44.186Z",
-    "tags": [
-      "prefix:anthropic-messages",
-      "provider:anthropic",
-      "protocol:anthropic-messages",
-      "tool",
-      "tool-loop",
-      "golden",
-      "flagship"
-    ]
-  },
-  "interactions": [
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"claude-opus-4-7\",\"system\":[{\"type\":\"text\",\"text\":\"Use the get_weather tool, then answer in one short sentence.\"}],\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is the weather in Paris?\"}]}],\"tools\":[{\"name\":\"get_weather\",\"description\":\"Get current weather for a city.\",\"input_schema\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"stream\":true,\"max_tokens\":80}"
-      },
-      "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "text/event-stream; charset=utf-8"
-        },
-        "body": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-opus-4-7\",\"id\":\"msg_01DgAEgLgB1ZhavZon4qGE1t\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":798,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":0,\"service_tier\":\"standard\",\"inference_geo\":\"global\"}}    }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"tool_use\",\"id\":\"toolu_01M8nJQQMxqpv1VaPYuJKT4j\",\"name\":\"get_weather\",\"input\":{},\"caller\":{\"type\":\"direct\"}}              }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"\"} }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"{\\\"city\\\": \"}              }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"\\\"Pa\"}    }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"ris\\\"}\"}  }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0           }\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"tool_use\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":798,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":66}             }\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"            }\n\n"
-      }
-    },
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"claude-opus-4-7\",\"system\":[{\"type\":\"text\",\"text\":\"Use the get_weather tool, then answer in one short sentence.\"}],\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is the weather in Paris?\"}]},{\"role\":\"assistant\",\"content\":[{\"type\":\"tool_use\",\"id\":\"toolu_01M8nJQQMxqpv1VaPYuJKT4j\",\"name\":\"get_weather\",\"input\":{\"city\":\"Paris\"}}]},{\"role\":\"user\",\"content\":[{\"type\":\"tool_result\",\"tool_use_id\":\"toolu_01M8nJQQMxqpv1VaPYuJKT4j\",\"content\":\"{\\\"temperature\\\":22,\\\"condition\\\":\\\"sunny\\\"}\"}]}],\"tools\":[{\"name\":\"get_weather\",\"description\":\"Get current weather for a city.\",\"input_schema\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"stream\":true,\"max_tokens\":80}"
-      },
-      "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "text/event-stream; charset=utf-8"
-        },
-        "body": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-opus-4-7\",\"id\":\"msg_011KJqj32QjkrUAiBFxhmEoG\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":895,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":5,\"service_tier\":\"standard\",\"inference_geo\":\"global\"}}       }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}            }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"Paris is curr\"}   }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"ently sunny at 22°C.\"}           }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0        }\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":895,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":19}}\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"}\n\n"
-      }
-    }
-  ]
-}
@@ -1,29 +0,0 @@
-{
-  "version": 1,
-  "metadata": {
-    "name": "anthropic-messages/rejects-malformed-assistant-tool-order-without-patch",
-    "recordedAt": "2026-05-05T20:08:42.597Z",
-    "tags": ["prefix:anthropic-messages", "provider:anthropic", "protocol:anthropic-messages", "tool", "sad-path"]
-  },
-  "interactions": [
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"claude-haiku-4-5-20251001\",\"messages\":[{\"role\":\"assistant\",\"content\":[{\"type\":\"tool_use\",\"id\":\"call_1\",\"name\":\"get_weather\",\"input\":{\"city\":\"Paris\"}},{\"type\":\"text\",\"text\":\"I will check the weather.\"}]},{\"role\":\"user\",\"content\":[{\"type\":\"tool_result\",\"tool_use_id\":\"call_1\",\"content\":\"{\\\"temperature\\\":\\\"72F\\\"}\"}]},{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Use that result to answer briefly.\"}]}],\"tools\":[{\"name\":\"get_weather\",\"description\":\"Get weather\",\"input_schema\":{\"type\":\"object\",\"properties\":{}}}],\"stream\":true,\"max_tokens\":4096}"
-      },
-      "response": {
-        "status": 400,
-        "headers": {
-          "content-type": "application/json"
-        },
-        "body": "{\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"messages.1: `tool_use` ids were found without `tool_result` blocks immediately after: call_1. Each `tool_use` block must have a corresponding `tool_result` block in the next message.\"},\"request_id\":\"req_011Cak2XdJgnzxKCY2BC2Beh\"}"
-      }
-    }
-  ]
-}
@@ -1,29 +0,0 @@
-{
-  "version": 1,
-  "metadata": {
-    "name": "anthropic-messages/streams-text",
-    "recordedAt": "2026-04-28T21:18:45.535Z",
-    "tags": ["prefix:anthropic-messages", "provider:anthropic", "protocol:anthropic-messages"]
-  },
-  "interactions": [
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"claude-haiku-4-5-20251001\",\"system\":[{\"type\":\"text\",\"text\":\"You are concise.\"}],\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Reply with exactly: Hello!\"}]}],\"stream\":true,\"max_tokens\":20,\"temperature\":0}"
-      },
-      "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "text/event-stream; charset=utf-8"
-        },
-        "body": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-haiku-4-5-20251001\",\"id\":\"msg_01UodR8c3ezAK8rAfi8HAs8g\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":18,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":2,\"service_tier\":\"standard\",\"inference_geo\":\"not_available\"}}          }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}    }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"Hello!\"}    }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0   }\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":18,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":5}             }\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"         }\n\n"
-      }
-    }
-  ]
-}
@@ -1,29 +0,0 @@
-{
-  "version": 1,
-  "metadata": {
-    "name": "anthropic-messages/streams-tool-call",
-    "recordedAt": "2026-04-28T21:18:46.878Z",
-    "tags": ["prefix:anthropic-messages", "provider:anthropic", "protocol:anthropic-messages", "tool"]
-  },
-  "interactions": [
-    {
-      "transport": "http",
-      "request": {
-        "method": "POST",
-        "url": "https://api.anthropic.com/v1/messages",
-        "headers": {
-          "anthropic-version": "2023-06-01",
-          "content-type": "application/json"
-        },
-        "body": "{\"model\":\"claude-haiku-4-5-20251001\",\"system\":[{\"type\":\"text\",\"text\":\"Call tools exactly as requested.\"}],\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Call get_weather with city exactly Paris.\"}]}],\"tools\":[{\"name\":\"get_weather\",\"description\":\"Get current weather for a city.\",\"input_schema\":{\"type\":\"object\",\"properties\":{\"city\":{\"type\":\"string\"}},\"required\":[\"city\"],\"additionalProperties\":false}}],\"tool_choice\":{\"type\":\"tool\",\"name\":\"get_weather\"},\"stream\":true,\"max_tokens\":80,\"temperature\":0}"
-      },
-      "response": {
-        "status": 200,
-        "headers": {
-          "content-type": "text/event-stream; charset=utf-8"
-        },
-        "body": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-haiku-4-5-20251001\",\"id\":\"msg_01RYgU7NUPMK4B9v8S7gVpCS\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":677,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":16,\"service_tier\":\"standard\",\"inference_geo\":\"not_available\"}}             }\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"tool_use\",\"id\":\"toolu_012rmAruviySvUXSjgCPWVRu\",\"name\":\"get_weather\",\"input\":{},\"caller\":{\"type\":\"direct\"}}      }\n\nevent: ping\ndata: {\"type\": \"ping\"}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"\"}             }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\"{\\\"city\\\":\"}    }\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"input_json_delta\",\"partial_json\":\" \\\"Paris\\\"}\"}     }\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0     }\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"tool_use\",\"stop_sequence\":null,\"stop_details\":null},\"usage\":{\"input_tokens\":677,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":33}              }\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"     }\n\n"
-      }
-    }
-  ]
-}
@@ -0,0 +1,57 @@
+{
+  "version": 1,
+  "metadata": {
+    "model": "anthropic.claude-opus-5-5",
+    "tags": [
+      "prefix:bedrock-mantle-messages",
+      "provider:amazon-bedrock",
+      "protocol:anthropic-messages",
+      "reasoning",
+      "effort-update"
+    ],
+    "name": "bedrock-mantle-messages/applies-mid-conversation-effort-updates-and-thinking-block-binding-on-opus-5-5",
+    "recordedAt": "2026-10-04T03:56:23.139Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://bedrock-mantle.us-east-1.api.aws/anthropic/v1/messages",
+        "headers": {
+          "anthropic-beta": "interleaved-thinking-2025-05-14,thinking-binding-controls-2026-08-01",
+          "anthropic-version": "2023-06-01",
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"anthropic.claude-opus-5-5\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Compute 37 * 43 step by step, then reply with only the integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"max_tokens\":2048,\"thinking\":{\"type\":\"adaptive\",\"display\":\"summarized\",\"block_binding\":{\"prefix_mismatch_behavior\":\"drop_block\"}},\"output_config\":{\"effort\":\"high\"}}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream; charset=utf-8"
+        },
+        "body": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-opus-5-5\",\"id\":\"msg_bdrk_y7h2x5bz6w6ggmekuxekbi6rseptglsljkwgj36phisnsnu3syea\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"container\":null,\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":31,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":2,\"service_tier\":\"standard\"},\"input_transformations\":[]}}\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"thinking\",\"thinking\":\"\",\"signature\":\"\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\"They\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" want\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" only\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" the final\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" integer, so\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" I just\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" need\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" to compute 37\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\"×43 \"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\"using the dif\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\"ference of squares: 40\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\"²−3²\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" = 1600−9 =\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"thinking_delta\",\"thinking\":\" 1591.\\n\\n\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"signature_delta\",\"signature\":\"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\"}}\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0}\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":1,\"content_block\":{\"type\":\"text\",\"text\":\"\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":1,\"delta\":{\"type\":\"text_delta\",\"text\":\"1591\"}}\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":1}\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null,\"container\":null},\"usage\":{\"input_tokens\":31,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":86,\"output_tokens_details\":{\"thinking_tokens\":82}}}\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"}\n\n"
+      }
+    },
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://bedrock-mantle.us-east-1.api.aws/anthropic/v1/messages",
+        "headers": {
+          "anthropic-beta": "interleaved-thinking-2025-05-14,mid-conversation-output-config-2026-07-01,thinking-binding-controls-2026-08-01",
+          "anthropic-version": "2023-06-01",
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"anthropic.claude-opus-5-5\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Compute 37 * 43 step by step, then reply with only the integer.\"}]},{\"role\":\"assistant\",\"content\":[{\"type\":\"thinking\",\"thinking\":\"They want only the final integer, so I just need to compute 37×43 using the difference of squares: 40²−3² = 1600−9 = 1591.\\n\\n\",\"signature\":\"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\"},{\"type\":\"text\",\"text\":\"1591\"}]},{\"role\":\"system\",\"content\":[],\"output_config\":{\"effort\":\"low\"}},{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"Add 9 to that result. Reply with only the integer.\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"max_tokens\":2048,\"thinking\":{\"type\":\"adaptive\",\"display\":\"summarized\",\"block_binding\":{\"prefix_mismatch_behavior\":\"drop_block\"}},\"output_config\":{\"effort\":\"high\"}}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream; charset=utf-8"
+        },
+        "body": "event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"model\":\"claude-opus-5-5\",\"id\":\"msg_bdrk_yzpmbqh3aag3i7kymdm7ctqputcpeuln3cy44msgbdnctkcweena\",\"type\":\"message\",\"role\":\"assistant\",\"content\":[],\"container\":null,\"stop_reason\":null,\"stop_sequence\":null,\"stop_details\":null,\"usage\":{\"input_tokens\":139,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"cache_creation\":{\"ephemeral_5m_input_tokens\":0,\"ephemeral_1h_input_tokens\":0},\"output_tokens\":4,\"service_tier\":\"standard\"},\"input_transformations\":[]}}\n\nevent: content_block_start\ndata: {\"type\":\"content_block_start\",\"index\":0,\"content_block\":{\"type\":\"text\",\"text\":\"\"}}\n\nevent: content_block_delta\ndata: {\"type\":\"content_block_delta\",\"index\":0,\"delta\":{\"type\":\"text_delta\",\"text\":\"1600\"}}\n\nevent: content_block_stop\ndata: {\"type\":\"content_block_stop\",\"index\":0}\n\nevent: message_delta\ndata: {\"type\":\"message_delta\",\"delta\":{\"stop_reason\":\"end_turn\",\"stop_sequence\":null,\"stop_details\":null,\"container\":null},\"usage\":{\"input_tokens\":139,\"cache_creation_input_tokens\":0,\"cache_read_input_tokens\":0,\"output_tokens\":4,\"output_tokens_details\":{\"thinking_tokens\":0}}}\n\nevent: message_stop\ndata: {\"type\":\"message_stop\"}\n\n"
+      }
+    }
+  ]
+}
@@ -0,0 +1,37 @@
+{
+  "version": 1,
+  "metadata": {
+    "model": "anthropic.claude-haiku-4-5",
+    "tags": [
+      "prefix:bedrock-mantle-messages",
+      "provider:amazon-bedrock",
+      "protocol:anthropic-messages",
+      "reasoning",
+      "system-update"
+    ],
+    "name": "bedrock-mantle-messages/lowers-system-updates-to-wrapped-user-text-on-haiku-4-5-with-budget-thinking",
+    "recordedAt": "2026-10-04T03:56:18.874Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://bedrock-mantle.us-east-1.api.aws/anthropic/v1/messages",
+        "headers": {
+          "anthropic-beta": "interleaved-thinking-2025-05-14",
+          "anthropic-version": "2023-06-01",
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"anthropic.claude-haiku-4-5\",\"messages\":[{\"role\":\"user\",\"content\":[{\"type\":\"text\",\"text\":\"What is 19 multiplied by 23?\"},{\"type\":\"text\",\"text\":\"<system-update>\\nReply with only the integer.\\n</system-update>\",\"cache_control\":{\"type\":\"ephemeral\"}}]}],\"stream\":true,\"max_tokens\":2048,\"thinking\":{\"type\":\"enabled\",\"budget_tokens\":1024}}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream; charset=utf-8"
+        },
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+}
@@ -0,0 +1,37 @@
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+    "recordedAt": "2026-10-04T03:56:23.956Z"
+  },
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+}
@@ -1,28 +0,0 @@
-{
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@@ -1,28 +0,0 @@
-{
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-  "metadata": {
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-    "recordedAt": "2026-05-06T01:35:06.767Z",
-    "tags": ["prefix:openai-compatible-chat", "protocol:openai-compatible-chat", "provider:openrouter"]
-  },
-  "interactions": [
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-      "transport": "http",
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-        "url": "https://openrouter.ai/api/v1/chat/completions",
-        "headers": {
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-        "body": "{\"model\":\"openai/gpt-4o-mini\",\"messages\":[{\"role\":\"system\",\"content\":\"You are concise.\"},{\"role\":\"user\",\"content\":\"Reply with exactly: Hello!\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_tokens\":20,\"temperature\":0}"
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-      "response": {
-        "status": 200,
-        "headers": {
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-        "body": ": OPENROUTER PROCESSING\n\ndata: {\"id\":\"gen-1778031306-UD7bR0I1JNCsPvVzlXat\",\"object\":\"chat.completion.chunk\",\"created\":1778031306,\"model\":\"openai/gpt-4o-mini\",\"provider\":\"Azure\",\"system_fingerprint\":\"fp_eb37e061ec\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"Hello\",\"role\":\"assistant\"},\"finish_reason\":null,\"native_finish_reason\":null}]}\n\ndata: {\"id\":\"gen-1778031306-UD7bR0I1JNCsPvVzlXat\",\"object\":\"chat.completion.chunk\",\"created\":1778031306,\"model\":\"openai/gpt-4o-mini\",\"provider\":\"Azure\",\"system_fingerprint\":\"fp_eb37e061ec\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"!\",\"role\":\"assistant\"},\"finish_reason\":null,\"native_finish_reason\":null}]}\n\ndata: {\"id\":\"gen-1778031306-UD7bR0I1JNCsPvVzlXat\",\"object\":\"chat.completion.chunk\",\"created\":1778031306,\"model\":\"openai/gpt-4o-mini\",\"provider\":\"Azure\",\"system_fingerprint\":\"fp_eb37e061ec\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":\"stop\",\"native_finish_reason\":\"stop\"}]}\n\ndata: {\"id\":\"gen-1778031306-UD7bR0I1JNCsPvVzlXat\",\"object\":\"chat.completion.chunk\",\"created\":1778031306,\"model\":\"openai/gpt-4o-mini\",\"provider\":\"Azure\",\"system_fingerprint\":\"fp_eb37e061ec\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"\",\"role\":\"assistant\"},\"finish_reason\":\"stop\",\"native_finish_reason\":\"stop\"}],\"usage\":{\"prompt_tokens\":21,\"completion_tokens\":3,\"total_tokens\":24,\"cost\":0.00000495,\"is_byok\":false,\"prompt_tokens_details\":{\"cached_tokens\":0,\"cache_write_tokens\":0,\"audio_tokens\":0,\"video_tokens\":0},\"cost_details\":{\"upstream_inference_cost\":0.00000495,\"upstream_inference_prompt_cost\":0.00000315,\"upstream_inference_completions_cost\":0.0000018},\"completion_tokens_details\":{\"reasoning_tokens\":0,\"image_tokens\":0,\"audio_tokens\":0}}}\n\ndata: [DONE]\n\n"
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-{
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+      }
+    }
+  ]
+}
@@ -0,0 +1,75 @@
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+      }
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+  ]
+}
@@ -0,0 +1,75 @@
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You must use lookup_rate before answering.\"},{\"role\":\"assistant\",\"content\":null,\"tool_calls\":[{\"id\":\"call_onp7EArhOgXu0hGRF6Y5WHLu\",\"type\":\"function\",\"function\":{\"name\":\"lookup_rate\",\"arguments\":\"{\\\"code\\\":\\\"ZEBRA\\\"}\"}}],\"reasoning_details\":[{\"type\":\"reasoning.encrypted\",\"data\":\"gAAAAABqwxLxEN4vtmI2WcZ_aDDttdmPwAHgnV2gLZBo_f_mmTdGm4oZzE2JVzcj72AeXHyABmmo2VQN4nXaZK9GSSUZRlYL8mECMxKTj9AMgL8zlnuN5WDexxU-e9SduGP36RN9nH56-go4dz8eu5DEMvMf_TMoTnxz5AnC_UWbty63Vp8jEgkD-DoRjd0cg9LjthP_FLyMvP2Wj9qMJxEuO7Mw2_Pu4I3YeChnygLvmRfRR2QkamL5vjb9yHkl0Lb502vEGB2DW_czNEpHxisifvwRBjA7vk0mbn2dlhiR80aNHO71hC-QqrtUfPXx2HIbVLfbPdJf0saI0wD7ZuCJSQCBfB7fMCnj2ZLQeXa67lgXwsZDLBg4HmSJFvsMinx1IHIjUk7iebsKvmYx40cjqpXL3wj7htZWk2hO9OyGGUwlRsn5THdhTsgwg2SPbuHxb-sLPQnEFZ7bRp5lsVm31X2dlHDa1uZ7KLJZyy9g2CLIKsBwFFoCK7jY3HBXfL21ac5TAkOzVmz-XKl6OMPSl-PSdByOO15uHHpyOcJvJvuaea5Tj1nihtuDlhUP5EQPi7MiWpJMFo9AhDCafAbaQOEF5W8AQPeb_GXvPTzhySRAC8PxrhraEcZ4fjpjLqkv6mi_A1YHwbHEHHWjcK5VEKc3dadlIM_s6djclFBocVXrvnQQElVhWBDM-RtK9sgR07BFj5LVk6fYvg0b6gQnbDuQH18jhtPoj0SX0lN921XEQ1ebMCWGLANND2ew_wyNShYouJohefLULicWG57xh_yV1KEG1ufBedq2CPvCHA9Hm5UssbeJx5yBriyUA2Yh4D7j2UBT_KDWEHydDLQ4mWEyLTfQn0ZB3ZOqkU79z3HpK2w_VHUnkl5nEYEU2bmF5lsG33B4gtbQIBtZT76-fizXsvVZx__taOWXg96VMi3CD3DY0TS76B4U92KFmAFJ4aeiM8bkPuzf1Qd202EWE39CotUDoxAM6mzQu0NObTDnGQE776P6kzUoIKUmP8sDwYG5xot8ZTuXcBYysvj4-pFC_fvqMhsdfgonbke78SIjHtmePsOkfHBnCjSSUFKEbaM0nm8jJ6nYVwiYFuXBKD31QD462TAC7ORVIn32sWSgV2t3Sd7vq4ws2Yy7nUoILRAt_NYQUEXt7_R8J5YWj1L6Ruagk7Vtt-CAWxT6FhVyU4JhMb6-tJrYHgdmtunYrjpHBiOVdQR25aOmLbc_WlDvpO4azcRazpgkASAjPaaDycYceKcheiyUDBgFrvcSYrS1fJb6YZrTzOKw1Ztd0YsklS4nc3jffLNLrBQVvnkajj0OHjGcW8wkP93TCMJyt8tfIH0Rd5hIZLY5EqUWj9yZgXO7CuDKQZIEI0oZXef3mjfQqH8Q9rZsSgS3DI3mCF3CN003R_ZKKLGWkG8VzwlvdocNxaV_Z-ujp_O0YMyOcmEoTJI-j3JP3nefNboyP7EWND6VWDjJbqg64dvu0PK0EW5L0lnAu0l-WVb2qmXLYao_7bOlD8JLFZOyUgHAWmetmnm0NuxzevJEVBkNUu1jQatPzf2Jzf9SGKM_3bM_z0TM5McCZ2Pikzwp96QlaiEEWV_j2g02PT5Y3td-lfpoKxoFD5tltGNY9TlPzK-4a9Iz0hloiCprxWMLGKw2JzctrPF1xr42PKGNgPE84xAQ3sQ4mQ==\",\"id\":\"rs_014406f0f45e19c6016ac312f01d2487d2a5f2bdb7fbc42f76\",\"format\":\"openai-responses-v1\",\"index\":0}],\"reasoning_content\":\"**Calculating private data**\\n\\nI need to follow the developer's instructions and use the provided tool to handle private data. First, I should look up the rate for \\\"ZEBRA\\\" before I answer. After that, I’ll multiply the rate by 17 and then add 9 to get the required number. It’s important to give only the requested number and avoid making another tool call. I’ll likely use the commentary channel for this tool call.\\n\\n__ENCRYPTED_REASONING__id=rs_014406f0f45e19c6016ac312f01d2487d2a5f2bdb7fbc42f76\\ngAAAAABqwxLxEN4vtmI2WcZ_aDDttdmPwAHgnV2gLZBo_f_mmTdGm4oZzE2JVzcj72AeXHyABmmo2VQN4nXaZK9GSSUZRlYL8mECMxKTj9AMgL8zlnuN5WDexxU-e9SduGP36RN9nH56-go4dz8eu5DEMvMf_TMoTnxz5AnC_UWbty63Vp8jEgkD-DoRjd0cg9LjthP_FLyMvP2Wj9qMJxEuO7Mw2_Pu4I3YeChnygLvmRfRR2QkamL5vjb9yHkl0Lb502vEGB2DW_czNEpHxisifvwRBjA7vk0mbn2dlhiR80aNHO71hC-QqrtUfPXx2HIbVLfbPdJf0saI0wD7ZuCJSQCBfB7fMCnj2ZLQeXa67lgXwsZDLBg4HmSJFvsMinx1IHIjUk7iebsKvmYx40cjqpXL3wj7htZWk2hO9OyGGUwlRsn5THdhTsgwg2SPbuHxb-sLPQnEFZ7bRp5lsVm31X2dlHDa1uZ7KLJZyy9g2CLIKsBwFFoCK7jY3HBXfL21ac5TAkOzVmz-XKl6OMPSl-PSdByOO15uHHpyOcJvJvuaea5Tj1nihtuDlhUP5EQPi7MiWpJMFo9AhDCafAbaQOEF5W8AQPeb_GXvPTzhySRAC8PxrhraEcZ4fjpjLqkv6mi_A1YHwbHEHHWjcK5VEKc3dadlIM_s6djclFBocVXrvnQQElVhWBDM-RtK9sgR07BFj5LVk6fYvg0b6gQnbDuQH18jhtPoj0SX0lN921XEQ1ebMCWGLANND2ew_wyNShYouJohefLULicWG57xh_yV1KEG1ufBedq2CPvCHA9Hm5UssbeJx5yBriyUA2Yh4D7j2UBT_KDWEHydDLQ4mWEyLTfQn0ZB3ZOqkU79z3HpK2w_VHUnkl5nEYEU2bmF5lsG33B4gtbQIBtZT76-fizXsvVZx__taOWXg96VMi3CD3DY0TS76B4U92KFmAFJ4aeiM8bkPuzf1Qd202EWE39CotUDoxAM6mzQu0NObTDnGQE776P6kzUoIKUmP8sDwYG5xot8ZTuXcBYysvj4-pFC_fvqMhsdfgonbke78SIjHtmePsOkfHBnCjSSUFKEbaM0nm8jJ6nYVwiYFuXBKD31QD462TAC7ORVIn32sWSgV2t3Sd7vq4ws2Yy7nUoILRAt_NYQUEXt7_R8J5YWj1L6Ruagk7Vtt-CAWxT6FhVyU4JhMb6-tJrYHgdmtunYrjpHBiOVdQR25aOmLbc_WlDvpO4azcRazpgkASAjPaaDycYceKcheiyUDBgFrvcSYrS1fJb6YZrTzOKw1Ztd0YsklS4nc3jffLNLrBQVvnkajj0OHjGcW8wkP93TCMJyt8tfIH0Rd5hIZLY5EqUWj9yZgXO7CuDKQZIEI0oZXef3mjfQqH8Q9rZsSgS3DI3mCF3CN003R_ZKKLGWkG8VzwlvdocNxaV_Z-ujp_O0YMyOcmEoTJI-j3JP3nefNboyP7EWND6VWDjJbqg64dvu0PK0EW5L0lnAu0l-WVb2qmXLYao_7bOlD8JLFZOyUgHAWmetmnm0NuxzevJEVBkNUu1jQatPzf2Jzf9SGKM_3bM_z0TM5McCZ2Pikzwp96QlaiEEWV_j2g02PT5Y3td-lfpoKxoFD5tltGNY9TlPzK-4a9Iz0hloiCprxWMLGKw2JzctrPF1xr42PKGNgPE84xAQ3sQ4mQ==\"},{\"role\":\"tool\",\"tool_call_id\":\"call_onp7EArhOgXu0hGRF6Y5WHLu\",\"content\":\"{\\\"code\\\":\\\"ZEBRA\\\",\\\"rate\\\":23}\"},{\"role\":\"assistant\",\"content\":\"400\",\"reasoning_details\":[{\"type\":\"reasoning.encrypted\",\"data\":\"gAAAAABqwxL0Nl6Jl5EZuOLine truncated
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream; charset=utf-8"
+        },
+        "body": "data: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\"**Calculating a simple addition**\\n\\nThe\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" user\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" wants\"},\"finish_reason\":null}]}\n\ndata: 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{\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" previous\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" final\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" answer\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\",\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" which\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" was\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" 400\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\".\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"choices\":[{\"index\":0,\"delta\":{\"reasoning_content\":\" This\"},\"finish_reason\":null}]}\n\ndata: {\"id\":\"resp_014406f0f45e19c6016ac312f49b9c87d2afc60121b8910612\",\"object\":\"chat.completion.chunk\",\"created\":1791169269,\"model\":\"openai-gpt-54-mini\",\"Line truncated
+      }
+    }
+  ]
+}
@@ -0,0 +1,35 @@
+{
+  "version": 1,
+  "metadata": {
+    "tags": [
+      "prefix:venice-chat",
+      "provider:venice",
+      "protocol:venice-chat",
+      "text",
+      "reasoning",
+      "toggle"
+    ],
+    "name": "venice-chat/qwen-disables-reasoning",
+    "recordedAt": "2026-10-05T02:59:04.614Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://api.venice.ai/api/v1/chat/completions",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"qwen3-6-27b\",\"messages\":[{\"role\":\"user\",\"content\":\"What is 23 multiplied by 17 plus 9? Reply with just the number.\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_completion_tokens\":4096,\"reasoning\":{\"enabled\":false},\"venice_parameters\":{\"include_venice_system_prompt\":false}}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream; charset=utf-8"
+        },
+        "body": "data: {\"service_tier\":null,\"id\":\"chatcmpl-RxYUpStKYw7YgEZcXjsb2dOt\",\"object\":\"chat.completion.chunk\",\"created\":1791169144,\"model\":\"qwen3-6-27b\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"reasoning_content\":null,\"tool_calls\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null}\n\ndata: {\"service_tier\":\"default\",\"id\":\"chatcmpl-RxYUpStKYw7YgEZcXjsb2dOt\",\"object\":\"chat.completion.chunk\",\"created\":1791169144,\"model\":\"qwen3-6-27b\",\"choices\":[{\"index\":0,\"delta\":{\"role\":\"assistant\",\"content\":\"\",\"reasoning_content\":null,\"tool_calls\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null}\n\ndata: {\"service_tier\":\"default\",\"id\":\"chatcmpl-RxYUpStKYw7YgEZcXjsb2dOt\",\"object\":\"chat.completion.chunk\",\"created\":1791169144,\"model\":\"qwen3-6-27b\",\"choices\":[{\"index\":0,\"delta\":{\"role\":null,\"content\":\"4\",\"reasoning_content\":null,\"tool_calls\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null}\n\ndata: {\"service_tier\":\"default\",\"id\":\"chatcmpl-RxYUpStKYw7YgEZcXjsb2dOt\",\"object\":\"chat.completion.chunk\",\"created\":1791169144,\"model\":\"qwen3-6-27b\",\"choices\":[{\"index\":0,\"delta\":{\"role\":null,\"content\":\"0\",\"reasoning_content\":null,\"tool_calls\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null}\n\ndata: {\"service_tier\":\"default\",\"id\":\"chatcmpl-RxYUpStKYw7YgEZcXjsb2dOt\",\"object\":\"chat.completion.chunk\",\"created\":1791169144,\"model\":\"qwen3-6-27b\",\"choices\":[{\"index\":0,\"delta\":{\"role\":null,\"content\":\"0\",\"reasoning_content\":null,\"tool_calls\":null},\"logprobs\":null,\"finish_reason\":null}],\"usage\":null}\n\ndata: {\"service_tier\":\"default\",\"id\":\"chatcmpl-RxYUpStKYw7YgEZcXjsb2dOt\",\"object\":\"chat.completion.chunk\",\"created\":1791169144,\"model\":\"qwen3-6-27b\",\"choices\":[{\"index\":0,\"delta\":{\"role\":null,\"content\":\"\",\"reasoning_content\":null,\"tool_calls\":null},\"logprobs\":null,\"finish_reason\":\"stop\"}]}\n\ndata: {\"service_tier\":\"default\",\"id\":\"chatcmpl-RxYUpStKYw7YgEZcXjsb2dOt\",\"object\":\"chat.completion.chunk\",\"created\":1791169144,\"model\":\"qwen3-6-27b\",\"choices\":[],\"usage\":{\"prompt_tokens\":32,\"completion_tokens\":4,\"total_tokens\":36},\"cost\":{\"usd\":0.0000234,\"diem\":0}}\n\ndata: [DONE]\n\n"
+      }
+    }
+  ]
+}
@@ -0,0 +1,33 @@
+{
+  "version": 1,
+  "metadata": {
+    "tags": [
+      "prefix:venice-chat",
+      "provider:venice",
+      "protocol:venice-chat",
+      "error"
+    ],
+    "name": "venice-chat/surfaces-venice-model-errors",
+    "recordedAt": "2026-10-05T02:59:11.768Z"
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://api.venice.ai/api/v1/chat/completions",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"no-such-model-xyz\",\"messages\":[{\"role\":\"user\",\"content\":\"Hello\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"venice_parameters\":{\"include_venice_system_prompt\":false}}"
+      },
+      "response": {
+        "status": 404,
+        "headers": {
+          "content-type": "application/json; charset=utf-8"
+        },
+        "body": "{\"error\":\"Specified model not found: no-such-model-xyz. Did you mean: z-ai-glm-5-3, z-ai-glm-5-3-flash, z-ai-glm-5-turbo?\"}"
+      }
+    }
+  ]
+}
@@ -8,7 +8,6 @@ import {
  type ProviderMetadata,
  type ToolCallPart,
  ToolResultPart,
-  type ToolResultValue,
  type Usage,
 } from "../../src/schema/index.js"
 import { type Tools, toDefinitions } from "../../src/tool.js"
@@ -39,9 +39,7 @@ describe("provider error classification", () => {
    ]

    expect(failures).toEqual(
-      failures.map((failure) =>
-        expect.objectContaining({ _tag: "InvalidRequest", classification: "payload-too-large" }),
-      ),
+      failures.map(() => expect.objectContaining({ _tag: "InvalidRequest", classification: "payload-too-large" })),
    )
  })

@@ -0,0 +1,26 @@
+import { LLM } from "../../src/index.js"
+import { Venice } from "../../src/providers.js"
+
+LLM.request({
+  model: Venice.chat("qwen3-6-27b"),
+  providerOptions: { reasoningEffort: "high", reasoning: { summary: "concise" }, veniceParameters: { includeVeniceSystemPrompt: false } },
+})
+LLM.request({
+  model: Venice.configure({ providerOptions: { reasoningEffort: "future-effort" } }).model("future-model"),
+  providerOptions: { reasoning: { enabled: false }, promptCacheRetention: "future-retention", parallelToolCalls: false },
+})
+LLM.request({
+  model: Venice.chat("qwen3-6-27b"),
+  // @ts-expect-error Thinking toggles are boolean.
+  providerOptions: { reasoning: { enabled: "false" } },
+})
+LLM.request({
+  model: Venice.chat("qwen3-6-27b"),
+  // @ts-expect-error Venice uses nested reasoning, not Anthropic thinking controls.
+  providerOptions: { thinking: { type: "disabled" } },
+})
+LLM.request({
+  model: Venice.chat("qwen3-6-27b"),
+  // @ts-expect-error Venice's system-prompt toggle is boolean.
+  providerOptions: { veniceParameters: { includeVeniceSystemPrompt: "false" } },
+})
@@ -7,67 +7,6 @@ const configuration = (provider: string, message: string) =>
  expect.objectContaining({ _tag: "ProviderConfiguration", provider, message })

 describe("provider package entrypoints", () => {
-  test("semantic API aliases expose the same contract", async () => {
-    const modules = await Promise.all([
-      import("@opencode/ai/providers/openai"),
-      import("@opencode/ai/providers/openai/responses"),
-      import("@opencode/ai/providers/openai/chat"),
-      import("@opencode/ai/providers/anthropic"),
-      import("@opencode/ai/providers/anthropic-compatible"),
-      import("@opencode/ai/providers/openai-compatible"),
-      import("@opencode/ai/providers/openai-compatible/responses"),
-      import("@opencode/ai/providers/amazon-bedrock"),
-      import("@opencode/ai/providers/azure"),
-      import("@opencode/ai/providers/azure/responses"),
-      import("@opencode/ai/providers/azure/chat"),
-      import("@opencode/ai/providers/google"),
-      import("@opencode/ai/providers/google-vertex"),
-      import("@opencode/ai/providers/google-vertex/gemini"),
-      import("@opencode/ai/providers/google-vertex/chat"),
-      import("@opencode/ai/providers/google-vertex/responses"),
-      import("@opencode/ai/providers/google-vertex/messages"),
-      import("@opencode/ai/providers/openrouter"),
-      import("@opencode/ai/providers/xai"),
-      import("@opencode/ai/providers/amazon-bedrock/mantle"),
-      import("@opencode/ai/providers/amazon-bedrock/mantle/chat"),
-      import("@opencode/ai/providers/amazon-bedrock/mantle/responses"),
-      import("@opencode/ai/providers/togetherai"),
-      import("@opencode/ai/providers/cerebras"),
-      import("@opencode/ai/providers/deepinfra"),
-      import("@opencode/ai/providers/groq"),
-      import("@opencode/ai/providers/baseten"),
-      import("@opencode/ai/providers/deepseek"),
-      import("@opencode/ai/providers/fireworks"),
-      import("@opencode/ai/providers/cloudflare-ai-gateway"),
-      import("@opencode/ai/providers/cloudflare-workers-ai"),
-      import("@opencode/ai/providers/minimax"),
-      import("@opencode/ai/providers/minimax/messages"),
-      import("@opencode/ai/providers/minimax/chat"),
-      import("@opencode/ai/providers/minimax/responses"),
-      import("@opencode/ai/providers/moonshot"),
-      import("@opencode/ai/providers/moonshot/chat"),
-      import("@opencode/ai/providers/moonshot/messages"),
-      import("@opencode/ai/providers/moonshot/responses"),
-      import("@opencode/ai/providers/zai"),
-      import("@opencode/ai/providers/zai/chat"),
-      import("@opencode/ai/providers/zai-coding-plan"),
-      import("@opencode/ai/providers/zai-coding-plan/chat"),
-      import("@opencode/ai/providers/zai-coding-plan/messages"),
-      import("@opencode/ai/providers/zai-coding-plan/responses"),
-      import("@opencode/ai/providers/alibaba"),
-      import("@opencode/ai/providers/alibaba/chat"),
-      import("@opencode/ai/providers/alibaba/messages"),
-      import("@opencode/ai/providers/alibaba/responses"),
-    ])
-
-    for (const module of modules) expect(module.model).toBeFunction()
-    expect(modules[0].model).toBe(modules[1].model)
-    expect(modules[8].model).toBe(modules[9].model)
-    expect(modules[12].model).toBe(modules[13].model)
-    expect(modules[19].model).toBe(modules[21].model)
-    expect(modules[19].model).not.toBe(modules[20].model)
-  })
-
  test("maps Alibaba API entrypoints onto explicit regional routes", async () => {
    const modules = await Promise.all([
      import("@opencode/ai/providers/alibaba"),
@@ -75,7 +14,6 @@ describe("provider package entrypoints", () => {
      import("@opencode/ai/providers/alibaba/messages"),
      import("@opencode/ai/providers/alibaba/responses"),
    ])
-    expect(modules[0].model).toBe(modules[1].model)
    const settings = {
      region: "eu-central-1",
      workspaceID: "llm-fixture",
@@ -103,7 +41,6 @@ describe("provider package entrypoints", () => {
      import("@opencode/ai/providers/moonshot/messages"),
      import("@opencode/ai/providers/moonshot/responses"),
    ])
-    expect(modules[0].model).toBe(modules[1].model)
    const settings = {
      apiKey: "fixture",
      baseURL: "https://gateway.example/v1",
@@ -147,7 +84,6 @@ describe("provider package entrypoints", () => {
      import("@opencode/ai/providers/minimax/chat"),
      import("@opencode/ai/providers/minimax/responses"),
    ])
-    expect(modules[0].model).toBe(modules[1].model)
    const settings = {
      apiKey: "fixture",
      baseURL: "https://gateway.example/v1",
@@ -174,8 +110,6 @@ describe("provider package entrypoints", () => {
      import("@opencode/ai/providers/zai-coding-plan/messages"),
      import("@opencode/ai/providers/zai-coding-plan/responses"),
    ])
-    expect(modules[0].model).toBe(modules[1].model)
-    expect(modules[2].model).toBe(modules[3].model)
    const routes = [
      "zai-chat",
      "zai-chat",
@@ -458,7 +392,6 @@ describe("provider package entrypoints", () => {

  test("selects Vertex entrypoints with the same model contract", async () => {
    const GoogleVertex = await import("@opencode/ai/providers/google-vertex")
-    const GoogleVertexGemini = await import("@opencode/ai/providers/google-vertex/gemini")
    const GoogleVertexChat = await import("@opencode/ai/providers/google-vertex/chat")
    const GoogleVertexResponses = await import("@opencode/ai/providers/google-vertex/responses")
    const GoogleVertexMessages = await import("@opencode/ai/providers/google-vertex/messages")
@@ -483,7 +416,6 @@ describe("provider package entrypoints", () => {
      project: "vertex-project",
    })

-    expect(GoogleVertexGemini.model).toBe(GoogleVertex.model)
    expect(gemini.route.id).toBe("google-vertex-gemini")
    expect(gemini.route.protocol).toBe("gemini")
    expect(gemini.route.endpoint.baseURL).toBe("https://aiplatform.googleapis.com/v1/publishers/google")
@@ -431,42 +431,115 @@ describe("Anthropic Messages route", () => {
        (yield* compileRequest(
          LLM.request({
            model: opus48,
-            messages: [Message.user("Before."), Message.system("One."), Message.system("Two.")],
+            messages: [
+              Message.user("Start."),
+              Message.assistant("One."),
+              Message.system("Update."),
+              Message.assistant("Two."),
+            ],
            cache: "none",
          }),
        )).body.messages,
      ).toEqual([
-        {
-          role: "user",
-          content: [
-            { type: "text", text: "Before." },
-            { type: "text", text: "<system-update>\nOne.\n</system-update>" },
-            { type: "text", text: "<system-update>\nTwo.\n</system-update>" },
-          ],
-        },
+        { role: "user", content: [{ type: "text", text: "Start." }] },
+        { role: "assistant", content: [{ type: "text", text: "One." }] },
+        { role: "user", content: [{ type: "text", text: "<system-update>\nUpdate.\n</system-update>" }] },
+        { role: "assistant", content: [{ type: "text", text: "Two." }] },
      ])
    }),
  )

-  it.effect("keeps a terminal Vertex system update in the tool-result turn", () =>
+  it.effect("moves system updates to the next assistant turn and sends consecutive updates together", () =>
+    Effect.gen(function* () {
+      const lower = (messages: ReadonlyArray<Message>) =>
+        compileRequest(LLM.request({ model: opus48, messages: [...messages], cache: "none" })).pipe(
+          Effect.map((prepared) => prepared.body.messages),
+        )
+      const system = (text: string) => ({ role: "system", content: [{ type: "text", text, cache_control: undefined }] })
+      const user = (text: string) => ({ role: "user", content: [{ type: "text", text }] })
+      const assistant = (text: string) => ({ role: "assistant", content: [{ type: "text", text }] })
+
+      expect(
+        yield* lower([
+          Message.user("Fix it."),
+          Message.assistant("Done."),
+          Message.system("Update."),
+          Message.user("Next."),
+        ]),
+      ).toEqual([user("Fix it."), assistant("Done."), user("Next."), system("Update.")])
+      expect(yield* lower([Message.user("Before."), Message.system("One."), Message.system("Two.")])).toEqual([
+        user("Before."),
+        system("One."),
+        system("Two."),
+      ])
+      expect(
+        yield* lower([
+          Message.user("Fix it."),
+          Message.assistant("Done."),
+          Message.system("One."),
+          Message.user("Next."),
+          Message.system("Two."),
+          Message.assistant("After."),
+        ]),
+      ).toEqual([
+        user("Fix it."),
+        assistant("Done."),
+        user("Next."),
+        system("One."),
+        system("Two."),
+        assistant("After."),
+      ])
+      expect(
+        yield* lower([
+          Message.user("Use the tool."),
+          Message.assistant([ToolCallPart.make({ id: "call_1", name: "lookup", input: {} })]),
+          Message.tool({ id: "call_1", name: "lookup", result: "Done." }),
+          Message.system("Update."),
+          Message.user("Also check tests."),
+        ]),
+      ).toEqual([
+        user("Use the tool."),
+        { role: "assistant", content: [{ type: "tool_use", id: "call_1", name: "lookup", input: {} }] },
+        { role: "user", content: [{ type: "tool_result", tool_use_id: "call_1", content: '"Done."' }] },
+        user("Also check tests."),
+        system("Update."),
+      ])
+    }),
+  )
+
+  it.effect("keeps wrapped system updates in place for models without native system updates", () =>
    Effect.gen(function* () {
      const prepared = yield* compileRequest(
        LLM.request({
-          model: vertexOpus48,
+          model,
          messages: [
-            Message.assistant([ToolCallPart.make({ id: "call_1", name: "lookup", input: {} })]),
-            Message.tool({ id: "call_1", name: "lookup", result: "Done." }),
-            Message.system("Operator update."),
+            Message.user("Fix it."),
+            Message.assistant("Done."),
+            Message.system("Update."),
+            Message.user("Next."),
          ],
          cache: "none",
        }),
      )

      expect(prepared.body.messages).toEqual([
-        {
-          role: "assistant",
-          content: [{ type: "tool_use", id: "call_1", name: "lookup", input: {} }],
-        },
+        { role: "user", content: [{ type: "text", text: "Fix it." }] },
+        { role: "assistant", content: [{ type: "text", text: "Done." }] },
+        { role: "user", content: [{ type: "text", text: "<system-update>\nUpdate.\n</system-update>" }] },
+        { role: "user", content: [{ type: "text", text: "Next." }] },
+      ])
+    }),
+  )
+
+  it.effect("sends Vertex system updates after local tool results as native system messages", () =>
+    Effect.gen(function* () {
+      const toolTurn = [
+        Message.assistant([ToolCallPart.make({ id: "call_1", name: "lookup", input: {} })]),
+        Message.tool({ id: "call_1", name: "lookup", result: "Done." }),
+        Message.system("Operator update."),
+      ]
+      const lowered = [
+        { role: "assistant", content: [{ type: "tool_use", id: "call_1", name: "lookup", input: {} }] },
        {
          role: "user",
          content: [
@@ -477,55 +550,23 @@ describe("Anthropic Messages route", () => {
              is_error: undefined,
              cache_control: undefined,
            },
-            {
-              type: "text",
-              text: "<system-update>\nOperator update.\n</system-update>",
-              cache_control: undefined,
-            },
          ],
        },
-      ])
-    }),
-  )
+        { role: "system", content: [{ type: "text", text: "Operator update.", cache_control: undefined }] },
+      ]

-  it.effect("preserves folded tool-result system updates across multi-turn Vertex history", () =>
-    Effect.gen(function* () {
-      const prepared = yield* compileRequest(
+      const terminal = yield* compileRequest(LLM.request({ model: vertexOpus48, messages: toolTurn, cache: "none" }))
+      const history = yield* compileRequest(
        LLM.request({
          model: vertexOpus48,
-          messages: [
-            Message.assistant([ToolCallPart.make({ id: "call_1", name: "lookup", input: {} })]),
-            Message.tool({ id: "call_1", name: "lookup", result: "Done." }),
-            Message.system("Operator update."),
-            Message.assistant("Acknowledged."),
-            Message.user("Next step."),
-          ],
+          messages: [...toolTurn, Message.assistant("Acknowledged."), Message.user("Next step.")],
          cache: "none",
        }),
      )

-      expect(prepared.body.messages).toEqual([
-        {
-          role: "assistant",
-          content: [{ type: "tool_use", id: "call_1", name: "lookup", input: {} }],
-        },
-        {
-          role: "user",
-          content: [
-            {
-              type: "tool_result",
-              tool_use_id: "call_1",
-              content: '"Done."',
-              is_error: undefined,
-              cache_control: undefined,
-            },
-            {
-              type: "text",
-              text: "<system-update>\nOperator update.\n</system-update>",
-              cache_control: undefined,
-            },
-          ],
-        },
+      expect(terminal.body.messages).toEqual(lowered)
+      expect(history.body.messages).toEqual([
+        ...lowered,
        { role: "assistant", content: [{ type: "text", text: "Acknowledged." }] },
        { role: "user", content: [{ type: "text", text: "Next step." }] },
      ])
@@ -21,7 +21,6 @@ import {
 import { LLMClient } from "../../src/route.js"
 import { compileRequest } from "../../src/route/client.js"
 import { AmazonBedrock } from "../../src/providers.js"
-import * as BedrockConverse from "../../src/protocols/bedrock-converse.js"
 import { it } from "../lib/effect.js"
 import { withProcessEnv } from "../lib/env.js"
 import { dynamicResponse, fixedResponse } from "../lib/http.js"
@@ -1,9 +1,8 @@
 import { describe, expect } from "bun:test"
 import { Effect } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
-import { LLM, Message } from "../../src/index.js"
+import { LLM, LLMEvent, LLMRequest, Message, ToolDefinition } from "../../src/index.js"
 import { AmazonBedrockMantle } from "../../src/providers.js"
-import { model } from "../../src/providers/amazon-bedrock/mantle.js"
 import { OpenResponses } from "../../src/protocols/open-responses.js"
 import { compileRequest, LLMClient } from "../../src/route/client.js"
 import { it } from "../lib/effect.js"
@@ -19,14 +18,14 @@ const credentials = {
 }

 describe("Amazon Bedrock Mantle provider", () => {
-  it.effect("uses Responses by default and exposes Chat explicitly", () =>
+  it.effect("uses Responses by default and exposes Chat and Messages explicitly", () =>
    Effect.gen(function* () {
      const provider = AmazonBedrockMantle.configure({ credentials })
-      expect(provider.model).toBe(provider.responses)
-      expect(AmazonBedrockMantle.model).toBe(AmazonBedrockMantle.responsesModel)
-      expect(model).toBe(AmazonBedrockMantle.responsesModel)
      expect(provider.model("openai.gpt-oss-120b").route.transport).toBe(OpenResponses.httpTransport)
      const chat = yield* compileRequest(LLM.request({ model: provider.chat("openai.gpt-oss-120b"), prompt: "Hi" }))
+      const messages = yield* compileRequest(
+        LLM.request({ model: provider.messages("anthropic.claude-opus-4-8"), prompt: "Hi", cache: "none" }),
+      )
      const responses = yield* compileRequest(
        LLM.request({ model: provider.model("openai.gpt-oss-120b"), prompt: "Hi" }),
      )
@@ -36,6 +35,11 @@ describe("Amazon Bedrock Mantle provider", () => {
        protocol: "openai-chat",
        body: { model: "openai.gpt-oss-120b" },
      })
+      expect(messages).toMatchObject({
+        route: "bedrock-mantle-messages",
+        protocol: "anthropic-messages",
+        body: { model: "anthropic.claude-opus-4-8", stream: true },
+      })
      expect(responses).toMatchObject({
        route: "bedrock-mantle-responses",
        protocol: "open-responses",
@@ -43,43 +47,77 @@ describe("Amazon Bedrock Mantle provider", () => {
      })
      expect(provider.model("openai.gpt-oss-120b").route.providerMetadataKey).toBe("mantle")
      expect(provider.chat("openai.gpt-oss-120b").route.providerMetadataKey).toBe("mantle")
+      expect(provider.messages("anthropic.claude-opus-4-8").route.providerMetadataKey).toBe("mantle")
    }),
  )

-  it.effect("preserves configured top-p generation defaults for Chat and Responses", () =>
+  it.effect("preserves configured top-p generation defaults for Chat, Messages, and Responses", () =>
    Effect.gen(function* () {
      const settings = { apiKey: "test-key", topP: 0.8 }
      const chat = yield* compileRequest(
        LLM.request({ model: AmazonBedrockMantle.chatModel("openai.gpt-oss-safeguard-20b", settings), prompt: "Hi" }),
      )
+      const messages = yield* compileRequest(
+        LLM.request({ model: AmazonBedrockMantle.messagesModel("anthropic.claude-opus-4-8", settings), prompt: "Hi" }),
+      )
      const responses = yield* compileRequest(
        LLM.request({ model: AmazonBedrockMantle.responsesModel("openai.gpt-oss-120b", settings), prompt: "Hi" }),
      )

      expect(chat.body.top_p).toBe(0.8)
+      expect(messages.body.top_p).toBe(0.8)
      expect(responses.body.top_p).toBe(0.8)
    }),
  )

-  it.effect("uses the Mantle endpoint and signing service", () =>
+  it.effect("uses the Mantle endpoint and signing service across Responses and Messages", () =>
    Effect.gen(function* () {
      const seen: Array<{ readonly url: string; readonly authorization: string | undefined }> = []
-      const model = AmazonBedrockMantle.configure({ credentials, region: "us-west-1" }).responses("openai.gpt-oss-120b")
-      yield* LLMClient.generate(LLM.request({ model, prompt: "Hi" })).pipe(
-        Effect.provide(
-          dynamicResponse((input) =>
-            Effect.gen(function* () {
-              const request = yield* HttpClientRequest.toWeb(input.request)
-              seen.push({ url: request.url, authorization: request.headers.get("authorization") ?? undefined })
-              return input.respond("", { headers: { "content-type": "text/event-stream" } })
-            }),
+      const configured = AmazonBedrockMantle.configure({ credentials, region: "us-west-1" })
+      for (const selected of [
+        configured.responses("openai.gpt-oss-120b"),
+        configured.messages("anthropic.claude-opus-4-8"),
+      ]) {
+        yield* LLMClient.generate(LLM.request({ model: selected, prompt: "Hi" })).pipe(
+          Effect.provide(
+            dynamicResponse((input) =>
+              Effect.gen(function* () {
+                const request = yield* HttpClientRequest.toWeb(input.request)
+                seen.push({ url: request.url, authorization: request.headers.get("authorization") ?? undefined })
+                return input.respond("", { headers: { "content-type": "text/event-stream" } })
+              }),
+            ),
          ),
-        ),
-        Effect.flip,
+          Effect.flip,
+        )
+      }
+
+      expect(seen.map((item) => item.url)).toEqual([
+        "https://bedrock-mantle.us-west-1.api.aws/v1/responses",
+        "https://bedrock-mantle.us-west-1.api.aws/anthropic/v1/messages",
+      ])
+      expect(seen.every((item) => item.authorization?.includes("/us-west-1/bedrock-mantle/aws4_request"))).toBe(true)
+    }).pipe(withProcessEnv({ AWS_BEARER_TOKEN_BEDROCK: undefined })),
+  )
+
+  it.effect("applies inline cache breakpoints on Mantle Messages", () =>
+    Effect.gen(function* () {
+      const model = AmazonBedrockMantle.configure({ apiKey: "test-key" }).messages("anthropic.claude-opus-4-8")
+      const prepared = yield* compileRequest(
+        LLM.request({
+          model,
+          system: "You are concise.",
+          messages: [Message.user("Hello")],
+          cache: "auto",
+        }),
      )

-      expect(seen[0]?.url).toBe("https://bedrock-mantle.us-west-1.api.aws/v1/responses")
-      expect(seen[0]?.authorization).toContain("/us-west-1/bedrock-mantle/aws4_request")
+      expect(prepared.body.system).toEqual([
+        { type: "text", text: "You are concise.", cache_control: { type: "ephemeral" } },
+      ])
+      expect(prepared.body.messages).toEqual([
+        { role: "user", content: [{ type: "text", text: "Hello", cache_control: { type: "ephemeral" } }] },
+      ])
    }),
  )

@@ -201,3 +239,198 @@ describe("Amazon Bedrock Mantle recorded", () => {
    }),
  )
 })
+
+const recordedMessages = recordedTests({
+  prefix: "bedrock-mantle-messages",
+  provider: "amazon-bedrock",
+  protocol: "anthropic-messages",
+  requires: ["AWS_BEARER_TOKEN_BEDROCK"],
+  options: { redact: { allowRequestHeaders: ["anthropic-version", "anthropic-beta"] } },
+})
+
+const mantleMessages = (modelID: string) =>
+  AmazonBedrockMantle.configure({
+    apiKey: process.env.AWS_BEARER_TOKEN_BEDROCK ?? "fixture",
+    region: "us-east-1",
+  }).messages(modelID)
+
+const weatherTool = ToolDefinition.make({
+  name: "get_weather",
+  description: "Get the current weather in a city",
+  inputSchema: {
+    type: "object",
+    properties: { city: { type: "string", enum: ["Paris"] } },
+    required: ["city"],
+    additionalProperties: false,
+  },
+})
+
+describe("Amazon Bedrock Mantle Messages recorded", () => {
+  recordedMessages.effect.with(
+    "replays signed thinking through a tool loop and native system update",
+    { tags: ["tool", "tool-loop", "reasoning", "system-update"], metadata: { model: "anthropic.claude-opus-4-8" } },
+    () =>
+      Effect.gen(function* () {
+        const model = mantleMessages("anthropic.claude-opus-4-8")
+        const initial = LLM.request({
+          model,
+          system: "You are a concise assistant.",
+          prompt:
+            "First calculate 37 * 43. Then call get_weather for Paris. After receiving the tool result, state both the product and the weather.",
+          tools: [weatherTool],
+          providerOptions: {
+            thinking: { type: "adaptive", display: "summarized" },
+            effort: "medium",
+          },
+          generation: { maxTokens: 2048 },
+        })
+        const first = yield* LLMClient.generate(initial)
+        expect(first.finishReason.normalized).toBe("tool-calls")
+        expect(first.toolCalls).toMatchObject([{ name: "get_weather", input: { city: "Paris" } }])
+        expect(first.reasoning.length).toBeGreaterThan(0)
+        expect(first.events.some(LLMEvent.is.toolInputDelta)).toBe(true)
+        const reasoningPart = first.message.content.find((part) => part.type === "reasoning")
+        const signature = (reasoningPart?.providerMetadata?.mantle as { readonly signature?: unknown } | undefined)
+          ?.signature
+        expect(typeof signature).toBe("string")
+
+        const followUp = LLMRequest.update(initial, {
+          messages: [
+            ...initial.messages,
+            first.message,
+            ...first.toolCalls.map((call) =>
+              Message.tool({ id: call.id, name: call.name, result: { condition: "sunny", temperatureC: 18 } }),
+            ),
+            Message.system("Reply in French in one short sentence."),
+          ],
+        })
+        const compiled = yield* compileRequest(followUp)
+        expect(compiled.body.messages[1]?.content[0]).toEqual({
+          type: "thinking",
+          thinking: first.reasoning,
+          signature: signature as string,
+        })
+        expect(compiled.body.messages.at(-1)).toEqual({
+          role: "system",
+          content: [
+            { type: "text", text: "Reply in French in one short sentence.", cache_control: { type: "ephemeral" } },
+          ],
+        })
+
+        const second = yield* LLMClient.generate(followUp)
+        expect(second.finishReason.normalized).toBe("stop")
+        expect(second.text).toContain("1591")
+        expect(second.text).toContain("18")
+      }),
+    120_000,
+  )
+
+  recordedMessages.effect.with(
+    "lowers system updates to wrapped user text on Haiku 4.5 with budget thinking",
+    { tags: ["reasoning", "system-update"], metadata: { model: "anthropic.claude-haiku-4-5" } },
+    () =>
+      Effect.gen(function* () {
+        const request = LLM.request({
+          model: mantleMessages("anthropic.claude-haiku-4-5"),
+          messages: [Message.user("What is 19 multiplied by 23?"), Message.system("Reply with only the integer.")],
+          providerOptions: {
+            thinking: { type: "enabled", budgetTokens: 1024 },
+          },
+          generation: { maxTokens: 2048 },
+        })
+        const compiled = yield* compileRequest(request)
+        expect(compiled.body.thinking).toEqual({ type: "enabled", budget_tokens: 1024 })
+        expect(compiled.body.messages.some((message) => message.role === "system")).toBe(false)
+
+        const response = yield* LLMClient.generate(request)
+        expect(response.finishReason.normalized).toBe("stop")
+        expect(response.reasoning.length).toBeGreaterThan(0)
+        expect(response.text.trim()).toContain("437")
+      }),
+    120_000,
+  )
+
+  recordedMessages.effect.with(
+    "applies mid-conversation effort updates and thinking block binding on Opus 5.5",
+    { tags: ["reasoning", "effort-update"], metadata: { model: "anthropic.claude-opus-5-5" } },
+    () =>
+      Effect.gen(function* () {
+        const model = mantleMessages("anthropic.claude-opus-5-5")
+        const firstRequest = LLM.request({
+          model,
+          prompt: "Compute 37 * 43 step by step, then reply with only the integer.",
+          providerOptions: {
+            thinking: { type: "adaptive", display: "summarized" },
+            effort: "high",
+          },
+          generation: { maxTokens: 2048 },
+        })
+        const firstCompiled = yield* compileRequest(firstRequest)
+        expect(firstCompiled.body.thinking).toEqual({
+          type: "adaptive",
+          display: "summarized",
+          block_binding: { prefix_mismatch_behavior: "drop_block" },
+        })
+
+        const first = yield* LLMClient.generate(firstRequest)
+        expect(first.finishReason.normalized).toBe("stop")
+        expect(first.reasoning.length).toBeGreaterThan(0)
+        expect(first.text.replaceAll(",", "")).toContain("1591")
+
+        const secondRequest = LLM.request({
+          model,
+          messages: [
+            ...firstRequest.messages,
+            first.message,
+            Message.effort({ effort: "low", previous: "high" }),
+            Message.user("Add 9 to that result. Reply with only the integer."),
+          ],
+          providerOptions: {
+            thinking: { type: "adaptive", display: "summarized" },
+            effort: "low",
+          },
+          generation: { maxTokens: 2048 },
+        })
+        const secondCompiled = yield* compileRequest(secondRequest)
+        expect(secondCompiled.body.output_config).toEqual({ effort: "high" })
+        expect(secondCompiled.body.messages.filter((message) => message.role === "system")).toEqual([
+          { role: "system", content: [], output_config: { effort: "low" } },
+        ])
+
+        const second = yield* LLMClient.generate(secondRequest)
+        expect(second.finishReason.normalized).toBe("stop")
+        expect(second.text.replaceAll(",", "")).toContain("1600")
+      }),
+    120_000,
+  )
+
+  recordedMessages.effect.with(
+    "strips unsupported mid-conversation effort updates on Opus 5.0",
+    { tags: ["reasoning", "effort-update"], metadata: { model: "anthropic.claude-opus-5" } },
+    () =>
+      Effect.gen(function* () {
+        const request = LLM.request({
+          model: mantleMessages("anthropic.claude-opus-5"),
+          messages: [
+            Message.user("What is 12 + 30?"),
+            Message.assistant("42"),
+            Message.effort({ effort: "low", previous: "high" }),
+            Message.user("Add 8 to that result. Reply with only the integer."),
+          ],
+          providerOptions: {
+            thinking: { type: "adaptive", display: "summarized" },
+            effort: "low",
+          },
+          generation: { maxTokens: 1024 },
+        })
+        const compiled = yield* compileRequest(request)
+        expect(compiled.body.output_config).toEqual({ effort: "low" })
+        expect(compiled.body.messages.some((message) => message.role === "system")).toBe(false)
+
+        const response = yield* LLMClient.generate(request)
+        expect(response.finishReason.normalized).toBe("stop")
+        expect(response.text.trim()).toContain("50")
+      }),
+    120_000,
+  )
+})
@@ -1,4 +1,4 @@
-import { describe, expect, test } from "bun:test"
+import { describe, expect } from "bun:test"
 import { ConfigProvider, Effect, Schema } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { LLM, LLMEvent } from "../../src/index.js"
@@ -52,7 +52,6 @@ describe("experimental Evaluation recorded", () => {
  typesafe.effect("evaluates choice score and boolean questions", () =>
    assertEvaluation(
      TypeSafeAI.configure({ apiKey: process.env.TYPESAFE_API_KEY ?? "fixture" }).experimental.evaluation("jev-latest"),
-      "typesafe",
    ),
  )

@@ -61,7 +60,6 @@ describe("experimental Evaluation recorded", () => {
      OpenCodeZen.configure({ apiKey: process.env.OPENCODE_API_KEY ?? "fixture" }).experimental.evaluation(
        "jev-1.13-free",
      ),
-      "opencode",
    ),
  )

@@ -70,15 +68,11 @@ describe("experimental Evaluation recorded", () => {
      OpenRouter.configure({ apiKey: process.env.OPENROUTER_API_KEY ?? "fixture" }).experimental.evaluation(
        "typesafe/jev-1.13",
      ),
-      "openrouter",
    ),
  )
 })

-const assertEvaluation = <Options extends EvaluationOptions>(
-  model: EvaluationModel<Options>,
-  metadataKey: "typesafe" | "opencode" | "openrouter",
-) =>
+const assertEvaluation = <Options extends EvaluationOptions>(model: EvaluationModel<Options>) =>
  Effect.gen(function* () {
    const response = yield* Evaluation.run({ model, state, questions })
    expect(response.model).toContain("jev-")
@@ -43,6 +43,7 @@ describe("native OpenAI-compatible providers", () => {
      [Azure.configure({ resourceName: "resource", apiKey: "test" }).responses("model"), "azure"],
      [AmazonBedrock.configure({ apiKey: "test" }).model("model"), "bedrock"],
      [AmazonBedrockMantle.configure({ apiKey: "test" }).chat("model"), "mantle"],
+      [AmazonBedrockMantle.configure({ apiKey: "test" }).messages("model"), "mantle"],
      [AmazonBedrockMantle.configure({ apiKey: "test" }).responses("model"), "mantle"],
      [Google.configure({ apiKey: "test" }).model("model"), "google"],
      [GoogleVertex.configure(vertex).model("model"), "vertex"],
@@ -1,7 +1,6 @@
 import { describe, expect } from "bun:test"
 import { Effect } from "effect"
 import { LLM, LLMEvent, LLMResponse, LanguageModel } from "../../src/index.js"
-import { OpenAIChat } from "../../src/protocols/openai-chat.js"
 import * as OpenAICompatible from "../../src/providers/openai-compatible.js"
 import * as OpenRouter from "../../src/providers/openrouter.js"
 import { LLMClient } from "../../src/route.js"
@@ -1,4 +1,4 @@
-import { describe, expect, test } from "bun:test"
+import { describe, expect } from "bun:test"
 import { Effect, Schema } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { LLM, LLMRequest, Message, ToolCallPart, ToolChoice, ToolDefinition } from "../../src/index.js"
@@ -3895,7 +3895,6 @@ describe("OpenAI Responses route", () => {

  it.effect("preserves foreign hosted images as portable image content when storage is enabled", () =>
    Effect.gen(function* () {
-      const item = { type: "image_generation_call", id: "ig_1", status: "completed", result: "AQID" }
      const prepared = yield* compileRequest(
        LLM.request({
          model: xaiModel,
@@ -0,0 +1,233 @@
+import { expect } from "bun:test"
+import { Effect, Schema } from "effect"
+import { LLM, LLMEvent, LLMRequest, Message, ToolChoice, ToolDefinition } from "../../src/index.js"
+import { Venice } from "../../src/providers.js"
+import { LLMClient } from "../../src/route.js"
+import { compileRequest } from "../../src/route/client.js"
+import { recordedTests } from "../recorded-test.js"
+
+const apiKey = process.env.VENICE_API_KEY ?? "fixture"
+const recorded = recordedTests({
+  prefix: "venice-chat",
+  provider: "venice",
+  protocol: "venice-chat",
+  requires: ["VENICE_API_KEY"],
+})
+const lookup = ToolDefinition.make({
+  name: "lookup_rate",
+  description: "Retrieve the private conversion rate for a code. Only this tool knows the rate.",
+  inputSchema: {
+    type: "object",
+    properties: { code: { type: "string", enum: ["ZEBRA", "MOOSE"] } },
+    required: ["code"],
+    additionalProperties: false,
+  },
+})
+
+for (const item of [
+  { model: "deepseek-v4-flash", reasoning: "scalar" },
+  { model: "claude-opus-4-8", reasoning: "signed", effort: "high" },
+  { model: "gemini-3-1-pro-preview", reasoning: "details", effort: "high" },
+  { model: "openai-gpt-54-mini", reasoning: "encrypted" },
+] as const) {
+  recorded.effect.with(
+    `${item.model} preserves reasoning through a tool loop and follow-up`,
+    {
+      tags: ["reasoning", "tool", "tool-loop", "continuation", "usage", item.reasoning],
+      metadata: { model: item.model },
+    },
+    () =>
+      Effect.gen(function* () {
+        const request = LLM.request({
+          model: Venice.configure({ apiKey }).chat(item.model),
+          system:
+            "Use the provided tool for private data. After receiving the result, give only the requested number; do not call the tool again.",
+          prompt:
+            "Look up conversion rate for code ZEBRA. Then multiply that rate by 17 and add 9. You must use lookup_rate before answering.",
+          tools: [lookup],
+          generation: { maxTokens: 4096 },
+          providerOptions: "effort" in item ? { reasoningEffort: item.effort } : undefined,
+        })
+        const first = yield* LLMClient.generate(request)
+        expect(first.toolCalls).toMatchObject([{ name: "lookup_rate", input: { code: "ZEBRA" } }])
+        expect(first.finishReason.normalized).toBe("tool-calls")
+        expect(first.events.filter(LLMEvent.is.finish)).toHaveLength(1)
+        const continuation = LLMRequest.update(request, {
+          toolChoice: ToolChoice.make("none"),
+          messages: [
+            ...request.messages,
+            first.message,
+            ...first.toolCalls.map((call) =>
+              Message.tool({ id: call.id, name: call.name, result: { code: "ZEBRA", rate: 23 } }),
+            ),
+          ],
+        })
+        const compiled = yield* compileRequest(continuation)
+        const assistant = compiled.body.messages.find((message) => message.role === "assistant")
+        expect(assistant).toBeDefined()
+        // Some models call a tool immediately and only reason after its result.
+        if (item.reasoning === "scalar" && first.reasoning.length > 0) {
+          expect(assistant).toMatchObject({ reasoning_content: first.reasoning })
+        }
+        if (item.reasoning === "signed") {
+          const details = first.message.content
+            .filter((part) => part.type === "reasoning")
+            .flatMap((part) => part.providerMetadata?.venice?.reasoningDetails ?? [])
+          expect(details).toEqual(
+            expect.arrayContaining([
+              expect.objectContaining({ type: "reasoning.text", signature: expect.any(String) }),
+            ]),
+          )
+          expect(assistant).toMatchObject({ reasoning_details: details })
+        }
+        if (item.reasoning === "details")
+          expect(assistant).toMatchObject({
+            reasoning_details: expect.arrayContaining([
+              expect.objectContaining({ type: "reasoning.encrypted", data: expect.any(String) }),
+            ]),
+          })
+        if (item.reasoning === "encrypted") {
+          expect(first.reasoning).not.toContain("__ENCRYPTED_REASONING__")
+          const details = first.message.content
+            .filter((part) => part.type === "reasoning")
+            .flatMap((part) => part.providerMetadata?.venice?.reasoningDetails ?? [])
+          if (details.length > 0) expect(assistant).toMatchObject({ reasoning_details: details })
+        }
+        const second = yield* LLMClient.generate(continuation)
+        expect(second.text).toContain("400")
+        expect(second.reasoning).not.toContain("__ENCRYPTED_REASONING__")
+        expect(second.toolCalls).toHaveLength(0)
+        expect(second.finishReason.normalized).toBe("stop")
+        expect(second.usage?.inputTokens).toBeGreaterThan(0)
+        expect(second.usage?.outputTokens).toBeGreaterThan(0)
+        const followUp = LLMRequest.update(continuation, {
+          messages: [
+            ...continuation.messages,
+            second.message,
+            Message.user("Add 7 to your previous final answer. Reply with just the number."),
+          ],
+        })
+        const third = yield* LLMClient.generate(followUp)
+        expect(third.text).toContain("407")
+        expect(third.finishReason.normalized).toBe("stop")
+        if (item.reasoning === "encrypted") {
+          expect(
+            [first, second, third].flatMap((response) =>
+              response.message.content
+                .filter((part) => part.type === "reasoning")
+                .flatMap((part) => part.providerMetadata?.venice?.reasoningDetails ?? []),
+            ),
+          ).toEqual(
+            expect.arrayContaining([
+              expect.objectContaining({ type: "reasoning.encrypted", data: expect.any(String) }),
+            ]),
+          )
+        }
+      }),
+    180_000,
+  )
+}
+
+recorded.effect.with(
+  "Gemini preserves per-call signatures through parallel tools",
+  { tags: ["tool", "parallel", "signature"] },
+  () =>
+    Effect.gen(function* () {
+      const request = LLM.request({
+        model: Venice.configure({ apiKey }).chat("gemini-3-8-flash"),
+        prompt:
+          "Look up private rates for both ZEBRA and MOOSE using two calls to lookup_rate. Then add the rates and multiply by 7. Use parallel calls if possible.",
+        tools: [lookup],
+        providerOptions: { reasoningEffort: "high", parallelToolCalls: true },
+        generation: { maxTokens: 4096 },
+      })
+      const first = yield* LLMClient.generate(request)
+      expect(first.toolCalls).toHaveLength(2)
+      const continuation = LLMRequest.update(request, {
+        toolChoice: ToolChoice.make("none"),
+        messages: [
+          ...request.messages,
+          first.message,
+          ...first.toolCalls.map((call) =>
+            Message.tool({
+              id: call.id,
+              name: call.name,
+              result: {
+                rate:
+                  Schema.decodeUnknownSync(Schema.Struct({ code: Schema.String }))(call.input).code === "ZEBRA"
+                    ? 23
+                    : 31,
+              },
+            }),
+          ),
+        ],
+      })
+      const compiled = yield* compileRequest(continuation)
+      expect(compiled.body.messages).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({
+            tool_calls: first.toolCalls.map((call) =>
+              expect.objectContaining({
+                id: call.id,
+                ...(call.providerMetadata?.venice?.thoughtSignature === undefined
+                  ? {}
+                  : { thought_signature: call.providerMetadata.venice.thoughtSignature }),
+              }),
+            ),
+          }),
+        ]),
+      )
+      const second = yield* LLMClient.generate(continuation)
+      expect(second.text).toContain("378")
+      const signature = second.message.content
+        .filter((part) => part.type === "text")
+        .map((part) => part.providerMetadata?.venice?.messageThoughtSignature)
+        .find((value) => value !== undefined)
+      expect(signature).toEqual(expect.any(String))
+      const followUp = LLMRequest.update(continuation, {
+        messages: [
+          ...continuation.messages,
+          second.message,
+          Message.user("Add 7 to your previous final answer. Reply with just the number."),
+        ],
+      })
+      expect((yield* compileRequest(followUp)).body.messages).toEqual(
+        expect.arrayContaining([expect.objectContaining({ role: "assistant", thought_signature: signature })]),
+      )
+      expect((yield* LLMClient.generate(followUp)).text).toContain("385")
+    }),
+  180_000,
+)
+
+recorded.effect.with(
+  "Qwen disables reasoning",
+  { tags: ["text", "reasoning", "toggle"] },
+  () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(
+        LLM.request({
+          model: Venice.configure({ apiKey }).chat("qwen3-6-27b"),
+          prompt: "What is 23 multiplied by 17 plus 9? Reply with just the number.",
+          providerOptions: { reasoning: { enabled: false } },
+          generation: { maxTokens: 4096 },
+        }),
+      )
+      expect(response.text).toContain("400")
+      expect(response.reasoning).toBe("")
+    }),
+  120_000,
+)
+
+recorded.effect.with("surfaces Venice model errors", { tags: ["error"] }, () =>
+  Effect.gen(function* () {
+    const result = yield* LLMClient.generate(
+      LLM.request({ model: Venice.configure({ apiKey }).chat("no-such-model-xyz"), prompt: "Hello" }),
+    ).pipe(Effect.result)
+    expect(result._tag).toBe("Failure")
+    if (result._tag === "Failure") {
+      expect(result.failure.reason._tag).toBe("InvalidRequest")
+      expect(result.failure.message).toContain("Specified model not found")
+      expect(result.failure.reason.http?.status).toBe(404)
+    }
+  }),
+)
@@ -0,0 +1,370 @@
+import { expect } from "bun:test"
+import { ConfigProvider, Effect } from "effect"
+import { Headers } from "effect/unstable/http"
+import { Auth, LLM, LLMClient, Message } from "../../src/index.js"
+import { OpenAI, Venice } from "../../src/providers.js"
+import { compileRequest } from "../../src/route/client.js"
+import { Endpoint } from "../../src/route/endpoint.js"
+import { it } from "../lib/effect.js"
+import { fixedResponse } from "../lib/http.js"
+import { sseEvents } from "../lib/sse.js"
+
+const model = Venice.configure({ apiKey: "fixture" }).chat("fixture-model")
+const frame = (delta: Record<string, unknown>, finish_reason: string | null = null) => ({
+  choices: [{ delta, finish_reason }],
+})
+
+it.effect("Venice owns its endpoint, environment auth, aliases, and SDK-compatible prompt default", () =>
+  Effect.gen(function* () {
+    expect(Venice.provider.model).toBe(Venice.provider.chat)
+    const selected = Venice.chat("qwen3-6-27b")
+    const request = LLM.request({ model: selected, prompt: "Hello", promptCacheKey: "session-123" })
+    const compiled = yield* compileRequest(request)
+    const url = Endpoint.render(selected.route.endpoint, { request, body: compiled.body }).toString()
+    expect(url).toBe("https://api.venice.ai/api/v1/chat/completions")
+    expect(selected.provider).toBe("venice")
+    expect(compiled.body.venice_parameters).toEqual({ include_venice_system_prompt: false })
+    expect(compiled.body.prompt_cache_key).toBe("session-123")
+    expect(compiled.body.store).toBeUndefined()
+    expect(compiled.body.stream_options).toEqual({ include_usage: true })
+    const headers = yield* selected.route.auth.apply({
+      request,
+      method: "POST",
+      url,
+      body: "{}",
+      headers: Headers.empty,
+    })
+    expect(headers.authorization).toBe("Bearer fixture")
+    const custom = Venice.configure({
+      baseURL: "https://gateway.example/v1",
+      queryParams: { deployment: "private" },
+      auth: Auth.header("x-key", "fixture"),
+    }).chat("qwen3-6-27b")
+    expect(Endpoint.render(custom.route.endpoint, { request, body: compiled.body }).toString()).toBe(
+      "https://gateway.example/v1/chat/completions?deployment=private",
+    )
+  }).pipe(Effect.provide(ConfigProvider.layer(ConfigProvider.fromEnv({ env: { VENICE_API_KEY: "fixture" } })))),
+)
+
+it.effect("Venice lowers typed options, model defaults, and explicit reasoning overrides", () =>
+  Effect.gen(function* () {
+    const compiled = yield* compileRequest(
+      LLM.request({
+        model: Venice.configure({ apiKey: "fixture", providerOptions: { reasoningEffort: "low" } }).model(
+          "qwen3-6-27b",
+        ),
+        generation: { maxTokens: 200, topK: 20 },
+        providerOptions: {
+          reasoningEffort: "future-effort",
+          reasoning: { effort: "high", enabled: true, summary: "concise" },
+          veniceParameters: { includeVeniceSystemPrompt: true, enableWebSearch: "auto", stripThinkingResponse: false },
+          parallelToolCalls: false,
+          maxCompletionTokens: 123,
+          minP: 0.1,
+          repetitionPenalty: 1.1,
+          stopTokenIds: [12],
+          promptCacheRetention: "24h",
+          logprobs: true,
+          topLogprobs: 2,
+          minTemp: 0.1,
+          maxTemp: 1.5,
+          responseFormat: { type: "json_object" },
+          user: "user-123",
+        },
+      }),
+    )
+    expect(compiled.body).toMatchObject({
+      max_completion_tokens: 123,
+      top_k: 20,
+      min_p: 0.1,
+      repetition_penalty: 1.1,
+      reasoning: { effort: "future-effort", enabled: true, summary: "concise" },
+      venice_parameters: {
+        include_venice_system_prompt: true,
+        enable_web_search: "auto",
+        strip_thinking_response: false,
+      },
+      parallel_tool_calls: false,
+      stop_token_ids: [12],
+      prompt_cache_retention: "24h",
+      logprobs: true,
+      top_logprobs: 2,
+      min_temp: 0.1,
+      max_temp: 1.5,
+      response_format: { type: "json_object" },
+      user: "user-123",
+    })
+    expect(compiled.body.reasoning_effort).toBeUndefined()
+    expect(compiled.body.max_tokens).toBeUndefined()
+    expect(
+      (yield* compileRequest(LLM.request({ model, providerOptions: { reasoning: { enabled: false } } }))).body
+        .reasoning,
+    ).toEqual({ enabled: false })
+    expect(
+      (yield* compileRequest(LLM.request({ model, cache: "none", promptCacheKey: "session-123" }))).body
+        .prompt_cache_key,
+    ).toBeUndefined()
+  }),
+)
+
+it.effect("Venice hides encrypted trailers across every marker split while preserving exact replay", () =>
+  Effect.gen(function* () {
+    const marker = "__ENCRYPTED_REASONING__"
+    for (const split of Array.from({ length: marker.length + 1 }, (_, index) => index)) {
+      const raw = `Visible summary\n${marker}id=rs_123\nopaque-payload`
+      const response = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              frame({ reasoning_content: `Visible summary\n${marker.slice(0, split)}` }),
+              frame({
+                reasoning_content: `${marker.slice(split)}id=rs_123\nopaque-payload`,
+                reasoning_details: [
+                  {
+                    type: "reasoning.encrypted",
+                    data: "opaque-payload",
+                    format: "openai-responses-v1",
+                    id: "rs_123",
+                    index: 0,
+                  },
+                ],
+              }),
+              frame({ content: "42" }, "stop"),
+            ),
+          ),
+        ),
+      )
+      expect(response.reasoning).toBe("Visible summary\n")
+      expect(
+        response.events
+          .filter((event) => event.type === "reasoning-delta")
+          .map((event) => event.text)
+          .join(""),
+      ).toBe("Visible summary\n")
+      const replay = yield* compileRequest(LLM.request({ model, messages: [Message.user("Hello"), response.message] }))
+      expect(replay.body.messages).toEqual(
+        expect.arrayContaining([
+          expect.objectContaining({
+            role: "assistant",
+            reasoning_content: raw,
+            reasoning_details: [
+              {
+                type: "reasoning.encrypted",
+                data: "opaque-payload",
+                format: "openai-responses-v1",
+                id: "rs_123",
+                index: 0,
+              },
+            ],
+          }),
+        ]),
+      )
+    }
+  }),
+)
+
+it.effect("Venice preserves opaque-only reasoning and does not eat an incomplete marker prefix", () =>
+  Effect.gen(function* () {
+    for (const scalar of ["__ENCRYPTED_REASONING__opaque", "normal _", "normal __ENCRYPTED_"]) {
+      const response = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+        Effect.provide(
+          fixedResponse(sseEvents(frame({ reasoning_content: scalar }), frame({ content: "42" }, "stop"))),
+        ),
+      )
+      expect(response.reasoning).toBe(scalar.startsWith("__ENCRYPTED_REASONING__") ? "" : scalar)
+      const body = (yield* compileRequest(LLM.request({ model, messages: [response.message] }))).body
+      expect(body.messages).toEqual(expect.arrayContaining([expect.objectContaining({ reasoning_content: scalar })]))
+    }
+  }),
+)
+
+it.effect("Venice encrypted trailers do not change the base OpenAI Chat protocol", () =>
+  LLMClient.generate(
+    LLM.request({ model: OpenAI.configure({ apiKey: "fixture" }).chat("gpt-4o"), prompt: "Hello" }),
+  ).pipe(
+    Effect.provide(
+      fixedResponse(
+        sseEvents(
+          frame({ reasoning_content: "text __ENCRYPTED_REASONING__payload" }),
+          frame({ content: "42" }, "stop"),
+        ),
+      ),
+    ),
+    Effect.tap((response) => Effect.sync(() => expect(response.reasoning).toBe("text __ENCRYPTED_REASONING__payload"))),
+  ),
+)
+
+it.effect("Venice keeps late Gemini signatures attached to the correct parallel call", () =>
+  Effect.gen(function* () {
+    const response = yield* LLMClient.generate(LLM.request({ model, prompt: "Lookup" })).pipe(
+      Effect.provide(
+        fixedResponse(
+          sseEvents(
+            frame({
+              tool_calls: [
+                { index: 0, id: "call_0", function: { name: "lookup", arguments: '{"key":"A"}' } },
+                { index: 1, id: "call_1", function: { name: "lookup", arguments: '{"key":"B"}' } },
+              ],
+            }),
+            frame({ tool_calls: [{ index: 0, thought_signature: "signed-first-call" }] }),
+            frame({}, "tool_calls"),
+          ),
+        ),
+      ),
+    )
+    expect(response.toolCalls).toHaveLength(2)
+    expect(response.toolCalls[0].providerMetadata?.venice?.thoughtSignature).toBe("signed-first-call")
+    expect(response.toolCalls[1].providerMetadata?.venice?.thoughtSignature).toBeUndefined()
+    const replay = yield* compileRequest(LLM.request({ model, messages: [Message.user("Lookup"), response.message] }))
+    expect(replay.body.messages).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          tool_calls: [
+            expect.objectContaining({ id: "call_0", thought_signature: "signed-first-call" }),
+            expect.not.objectContaining({ thought_signature: expect.anything() }),
+          ],
+        }),
+      ]),
+    )
+  }),
+)
+
+it.effect("Venice preserves message signatures even for identical answers and empty intervening messages", () =>
+  Effect.gen(function* () {
+    const response = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+      Effect.provide(
+        fixedResponse(
+          sseEvents(frame({ content: "42" }), frame({ thought_signature: "second-signature" }), frame({}, "stop")),
+        ),
+      ),
+    )
+    const request = LLM.request({
+      model,
+      messages: [
+        Message.assistant([
+          { type: "text", text: "42", providerMetadata: { venice: { messageThoughtSignature: "first-signature" } } },
+        ]),
+        Message.assistant(""),
+        response.message,
+      ],
+    })
+    expect((yield* compileRequest(request)).body.messages).toEqual([
+      { role: "assistant", content: "42", thought_signature: "first-signature" },
+      { role: "assistant", content: "42", thought_signature: "second-signature" },
+    ])
+  }),
+)
+
+it.effect("Venice merges signed Claude reasoning without losing its final signature", () =>
+  Effect.gen(function* () {
+    const response = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+      Effect.provide(
+        fixedResponse(
+          sseEvents(
+            frame({
+              reasoning_content: "Think ",
+              reasoning_details: [{ type: "reasoning.text", text: "Think ", format: "anthropic-claude-v1", index: 0 }],
+            }),
+            frame({
+              reasoning_content: "carefully",
+              reasoning_details: [
+                { type: "reasoning.text", text: "carefully", format: "anthropic-claude-v1", index: 0 },
+              ],
+            }),
+            frame({
+              reasoning_details: [
+                {
+                  type: "reasoning.text",
+                  text: "",
+                  signature: "claude-signature",
+                  format: "anthropic-claude-v1",
+                  index: 0,
+                },
+              ],
+            }),
+            frame({ content: "42" }, "stop"),
+          ),
+        ),
+      ),
+    )
+    expect(response.reasoning).toBe("Think carefully")
+    expect((yield* compileRequest(LLM.request({ model, messages: [response.message] }))).body.messages).toEqual(
+      expect.arrayContaining([
+        expect.objectContaining({
+          reasoning_details: [
+            {
+              type: "reasoning.text",
+              text: "Think carefully",
+              signature: "claude-signature",
+              format: "anthropic-claude-v1",
+              index: 0,
+            },
+          ],
+        }),
+      ]),
+    )
+  }),
+)
+
+it.effect("Venice maps cache-write usage and retains the raw wire spelling", () =>
+  LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+    Effect.provide(
+      fixedResponse(
+        sseEvents(frame({ content: "42" }, "stop"), {
+          choices: [],
+          usage: {
+            prompt_tokens: 100,
+            completion_tokens: 20,
+            total_tokens: 120,
+            prompt_tokens_details: { cached_tokens: 40, cache_creation_input_tokens: 30 },
+            completion_tokens_details: { reasoning_tokens: 10 },
+          },
+        }),
+      ),
+    ),
+    Effect.tap((response) =>
+      Effect.sync(() => {
+        expect(response.usage).toMatchObject({
+          inputTokens: 100,
+          outputTokens: 20,
+          nonCachedInputTokens: 30,
+          cacheReadInputTokens: 40,
+          cacheWriteInputTokens: 30,
+          reasoningTokens: 10,
+        })
+        expect(response.usage?.providerMetadata?.venice).toMatchObject({
+          prompt_tokens_details: { cache_creation_input_tokens: 30 },
+        })
+      }),
+    ),
+  ),
+)
+
+it.effect("Venice surfaces HTTP string errors and streaming validation details without losing the payload", () =>
+  Effect.gen(function* () {
+    const http = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+      Effect.provide(
+        fixedResponse('{"error":"Specified model not found"}', {
+          status: 404,
+          headers: { "content-type": "application/json" },
+        }),
+      ),
+      Effect.result,
+    )
+    expect(http._tag).toBe("Failure")
+    if (http._tag === "Failure") expect(http.failure.message).toContain("Specified model not found")
+    const payload = {
+      error: "Invalid request parameters",
+      issues: [{ message: "Unsupported value", path: ["reasoning", "effort"] }],
+    }
+    const streamed = yield* LLMClient.generate(LLM.request({ model, prompt: "Hello" })).pipe(
+      Effect.provide(fixedResponse(sseEvents(payload))),
+      Effect.result,
+    )
+    expect(streamed._tag).toBe("Failure")
+    if (streamed._tag === "Failure") {
+      expect(streamed.failure.message).toContain("reasoning.effort: Unsupported value")
+      expect(JSON.parse(streamed.failure.reason.body ?? "{}")).toEqual(payload)
+    }
+  }),
+)
@@ -127,11 +127,6 @@ const assistantContent = (events: ReadonlyArray<LLMEvent>) =>
 export const expectFinish = (events: ReadonlyArray<LLMEvent>, reason: FinishReason) =>
  expect(events.at(-1)).toMatchObject({ type: "finish", reason: { normalized: reason } })

-export const expectWeatherToolCall = (response: LLMResponse) =>
-  expect(response.toolCalls).toMatchObject([
-    { type: "tool-call", id: expect.any(String), name: weatherToolName, input: { city: "Paris" } },
-  ])
-
 export const expectWeatherToolLoop = (events: ReadonlyArray<LLMEvent>) => {
  const finishes = events.filter(LLMEvent.is.finish)
  expect(finishes).toHaveLength(1)
@@ -1,7 +1,6 @@
-import { fileURLToPath } from "node:url"
-import { expect, story } from "../../storybook/playwright/story"
+import { expect, sourceURL, story } from "../../storybook/playwright/story"

-const source = (path: string) => `/@fs/${fileURLToPath(new URL(path, import.meta.url)).replaceAll("\\", "/")}`
+const source = (path: string) => sourceURL(new URL(path, import.meta.url))

 const modules = {
  fixture: source("../../gui-extensions/src/browser/panel.fixture.tsx"),
@@ -1,7 +1,6 @@
-import { fileURLToPath } from "node:url"
-import { expect, story } from "../../storybook/playwright/story"
+import { expect, sourceURL, story } from "../../storybook/playwright/story"

-const source = (path: string) => `/@fs/${fileURLToPath(new URL(path, import.meta.url)).replaceAll("\\", "/")}`
+const source = (path: string) => sourceURL(new URL(path, import.meta.url))

 const modules = {
  fixture: source("../../gui-extensions/src/browser/panel.fixture.tsx"),
@@ -93,6 +92,7 @@ story("comments on a picked element over a still of the page", async ({ page })
  await picker.click()
  await expect(picker).toHaveAttribute("aria-pressed", "true")
  await expect(root.getByText("Picker: on", { exact: true })).toBeVisible()
+  await expect(root.getByText("Session getter reads: 0", { exact: true })).toBeVisible()
  await expect(root.getByRole("status")).toHaveText(
    "Click an element in the page to comment on it. Press Escape to cancel.",
  )
@@ -101,6 +101,7 @@ story("comments on a picked element over a still of the page", async ({ page })
  await expect(picker).toHaveAttribute("aria-pressed", "false")
  const editor = root.locator('[data-slot="browser-comment-editor"] textarea')
  await expect(editor).toBeFocused()
+  await expect(root.getByText("Session getter reads: 0", { exact: true })).toBeVisible()
  await expect(root.locator('[data-slot="browser-comment-editor"]')).toContainText("button.primary")
  // The spotlight frames the picked element in surface pixels.
  await expect(root.locator('[data-slot="browser-comment-spotlight"]')).toHaveCSS("left", "48px")
@@ -148,6 +149,44 @@ story("cancels the picker and a comment with Escape", async ({ page }) => {
  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
 })

+story("cleans up the originating session's picker and comment after a session switch", async ({ page }) => {
+  const root = page.getByTestId("browser-pane-fixture")
+  const picker = root.getByRole("button", { name: "Select an element to comment on", exact: true })
+  await picker.click()
+  await expect(root.getByText("Picker Alpha: on", { exact: true })).toBeVisible()
+  await root.getByRole("button", { name: "Beta", exact: true }).click()
+  await expect(root.getByTestId("native-Beta")).toHaveAttribute("data-visible", "true")
+  await expect(root.getByText("Picker Alpha: off", { exact: true })).toBeVisible()
+  await expect(picker).toHaveAttribute("aria-pressed", "false")
+
+  await root.getByRole("button", { name: "Alpha", exact: true }).click()
+  await picker.click()
+  await root.getByRole("button", { name: "Pick element", exact: true }).click()
+  await expect(root.locator('[data-slot="browser-comment-editor"] textarea')).toBeFocused()
+  await root.getByRole("button", { name: "Beta", exact: true }).click()
+  await expect(root.locator('[data-component="browser-comment"]')).toHaveCount(0)
+  await expect(root.getByText("Highlights: clear", { exact: true })).toBeVisible()
+  await expect(root.getByText("Highlight owners: Alpha", { exact: true })).toBeVisible()
+})
+
+story("ends the native picker and highlight when the pane unmounts", async ({ page }) => {
+  const root = page.getByTestId("browser-pane-fixture")
+  const picker = root.getByRole("button", { name: "Select an element to comment on", exact: true })
+  await picker.click()
+  await expect(root.getByText("Picker: on", { exact: true })).toBeVisible()
+  await root.getByRole("button", { name: "Unmount pane", exact: true }).click()
+  await expect(root.locator("#browser-panel")).toHaveCount(0)
+  await expect(root.getByText("Picker: off", { exact: true })).toBeVisible()
+
+  await root.getByRole("button", { name: "Alpha", exact: true }).click()
+  await picker.click()
+  await root.getByRole("button", { name: "Pick element", exact: true }).click()
+  await expect(root.locator('[data-slot="browser-comment-editor"] textarea')).toBeFocused()
+  await root.getByRole("button", { name: "Unmount pane", exact: true }).click()
+  await expect(root.locator("#browser-panel")).toHaveCount(0)
+  await expect(root.getByText("Highlights: clear", { exact: true })).toBeVisible()
+})
+
 story("keeps a comment draft but drops its ref when the page navigates", async ({ page }) => {
  const root = page.getByTestId("browser-pane-fixture")
  await root.getByRole("button", { name: "Select an element to comment on", exact: true }).click()
@@ -232,17 +271,22 @@ story("keeps the submitted URL visible until the browser reports navigation", as
  await expect(address).toHaveValue("https://example.com/")
 })

-story("restores the current URL when a submitted navigation is blocked", async ({ page }) => {
+story("restores the current URL each time the same submitted navigation is blocked", async ({ page }) => {
  const root = page.getByTestId("browser-pane-fixture")
  await root.getByRole("button", { name: "Delay navigation", exact: true }).click()
  const address = root.getByRole("textbox", { name: "Browser address", exact: true })
-  await address.fill("https://blocked.example/")
-  await address.press("Enter")
-  await expect(address).toHaveValue("https://blocked.example/")
-  await root.getByRole("button", { name: "Block navigation", exact: true }).click()
-  await expect(root.getByText("ERR_BLOCKED_BY_CLIENT", { exact: true })).toBeVisible()
-  await expect(address).toHaveValue("https://alpha.example/")
-  await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
+
+  for (const submission of [1, 2]) {
+    await story.step(`blocked submission ${submission}`, async () => {
+      await address.fill("https://blocked.example/")
+      await address.press("Enter")
+      await expect(address).toHaveValue("https://blocked.example/")
+      await root.getByRole("button", { name: "Block navigation", exact: true }).click()
+      await expect(root.getByRole("alert")).toHaveText("Request failed")
+      await expect(address).toHaveValue("https://alpha.example/")
+      await expect(root.getByTestId("native-Alpha")).toHaveAttribute("data-visible", "true")
+    })
+  }
 })

 story("shows a themed failure state for only the failed tab and allows retry", async ({ page }) => {
@@ -300,10 +344,12 @@ story("selects the full URL when the address field gains focus", async ({ page }
  await address.focus()
  await expect(address).toHaveJSProperty("selectionStart", 0)
  await expect(address).toHaveJSProperty("selectionEnd", "https://example.com/".length)
+  // A click on the focused field places the caret instead of selecting the URL again.
  await address.press("ArrowRight")
  await address.click()
-  await expect(address).toHaveJSProperty("selectionStart", 0)
-  await expect(address).toHaveJSProperty("selectionEnd", "https://example.com/".length)
+  await expect
+    .poll(() => address.evaluate((input: HTMLInputElement) => input.selectionStart === input.selectionEnd))
+    .toBe(true)
 })

 story("keeps the current page visible while a submitted URL loads", async ({ page }) => {
@@ -1,8 +1,7 @@
-import { fileURLToPath } from "node:url"
 import type { Definition } from "@opencode/gui-extensions/sdk"
-import { expect, story } from "../../storybook/playwright/story"
+import { expect, sourceURL, story } from "../../storybook/playwright/story"

-const source = (path: string) => `/@fs/${fileURLToPath(new URL(path, import.meta.url)).replaceAll("\\", "/")}`
+const source = (path: string) => sourceURL(new URL(path, import.meta.url))

 const modules = {
  fixture: source("./extension-host.fixture.tsx"),
@@ -16,7 +16,16 @@ import {
  type StoreOptions,
  type Workspaces,
 } from "@opencode/gui-extensions/sdk"
-import { createMemo, createSignal, getOwner, onCleanup, runWithOwner, Show, type ParentProps } from "solid-js"
+import {
+  createComponent,
+  createMemo,
+  createSignal,
+  getOwner,
+  onCleanup,
+  runWithOwner,
+  Show,
+  type ParentProps,
+} from "solid-js"
 import { createStore, produce } from "solid-js/store"
 import { Schema } from "effect"
 import { render } from "solid-js/web"
@@ -25,12 +34,15 @@ import { Persist, persisted } from "@/runtime/persistence/storage"
 import { ServerScope } from "@/runtime/server/scope"
 import { ExtensionHostProvider, useExtensionHost, type HostApiFactories } from "../src/runtime/extension/host"
 import { createHostApis } from "../src/runtime/extension/host-apis"
+import { createInstalled } from "../src/runtime/extension/installed"
+import { extensionEnabled } from "@opencode/gui-extensions/sdk/bridge"
 import { createRegion, RegionContent } from "../src/runtime/extension/panels"
 import { ExtensionSlot } from "../src/runtime/extension/render"
 import { persistedHandle } from "../src/runtime/extension/stores"
 import { LanguageProvider } from "../src/runtime/i18n/language"
+import { GuiExtensionsSettings } from "../src/runtime/extension/settings-page-dev"

-export { Contract, createKeyed, Panel, Slot, Store } from "@opencode/gui-extensions/sdk"
+export { bindExtension, useExtension, Contract, createKeyed, Panel, Slot, Store } from "@opencode/gui-extensions/sdk"

 export { Schema }

@@ -45,7 +57,7 @@ type Captured = { apis?: ReturnType<typeof createHostApis> }
 /** A value the fixture's storage holds as JSON. */
 type Json = string | number | boolean | null | readonly Json[] | { readonly [key: string]: Json }

-export { createMemo, createSignal, getOwner, onCleanup, runWithOwner }
+export { createComponent, createMemo, createSignal, getOwner, onCleanup, runWithOwner }

 const layout: Layout = {
  narrow: () => false,
@@ -189,7 +201,10 @@ export function mountExtensionHost() {
 export function mountExtensions(input: {
  definitions: readonly Definition[]
  disabled?: readonly string[]
+  bridge?: Parameters<typeof createInstalled>[0]
  stored?: Readonly<Record<string, Json>>
+  /** Shows the production developer settings page for status-label contracts. */
+  settings?: boolean
 }) {
  const held = Promise.withResolvers<void>()
  const [disabled, setDisabled] = createSignal<ReadonlySet<string>>(new Set(input.disabled ?? []))
@@ -230,10 +245,24 @@ export function mountExtensions(input: {
  })

  function MountedHost() {
+    const installed = input.bridge ? createInstalled(input.bridge) : undefined
+
+    const disabledState = createMemo(() => {
+      if (!installed) return disabled()
+
+      const state = installed.enableState()
+
+      if (!state) return undefined
+
+      return new Set(
+        input.definitions.flatMap((definition) => (extensionEnabled(definition, state) ? [] : [definition.id])),
+      )
+    })
+
    return (
      <ExtensionHostProvider
        definitions={input.definitions}
-        disabled={disabled}
+        disabled={disabledState}
        apis={fakeApis(storage)}
        whenMounted={mounted}
      >
@@ -248,6 +277,9 @@ export function mountExtensions(input: {

    return (
      <Show when={host.ready()}>
+        <Show when={input.settings}>
+          <GuiExtensionsSettings />
+        </Show>
        <ExtensionSlot at="window.bottom" input={{}} />
      </Show>
    )
@@ -362,15 +394,13 @@ export function mountSessionRegion(input: { definitions: readonly Definition[];
  }

  const [view, setView] = createSignal(object("a"))
+  const [routed, setRouted] = createSignal(true)

  const route = {
-    get session() {
-      return view()
-    },
    composer: { attach: () => void attached.push(view().id), update() {}, detach() {} },
  }

-  // SAFETY: the test's extension reads only `session` and `composer.attach` of the screen.
+  // SAFETY: the test's extension reads only `composer.attach` of the screen.
  // oxlint-disable-next-line anti-slop/no-chained-type-assertions -- see SAFETY above
  const screen = route as unknown as SessionScreen

@@ -385,6 +415,7 @@ export function mountSessionRegion(input: { definitions: readonly Definition[];
    const region = createRegion({
      region: "side",
      view,
+      screen,
      tabs: () => ({
        all,
        active: () => input.active,
@@ -403,11 +434,13 @@ export function mountSessionRegion(input: { definitions: readonly Definition[];
            get session() {
              return view()
            },
+            screen,
          }}
        />
        <RegionContent
          region={region}
          view={view()}
+          screen={screen}
          frame={{
            shown: () => true,
            present: () => true,
@@ -429,7 +462,7 @@ export function mountSessionRegion(input: { definitions: readonly Definition[];
            <RealHost
              definitions={input.definitions}
              captured={captured}
-              mounted={standIn({ current: view, screen: () => screen })}
+              mounted={standIn({ current: () => (routed() ? view() : undefined), screen: () => screen })}
            >
              <Region />
            </RealHost>
@@ -444,6 +477,8 @@ export function mountSessionRegion(input: { definitions: readonly Definition[];
    container,
    /** Routes a session: the screen creates a new session object for it. */
    route: (id: string) => setView(object(id)),
+    /** The route leaves while its old screen has not unmounted yet. */
+    leave: () => setRouted(false),
    /** The session each composer attachment reached, in order. */
    attached,
    status: (id: string) => hosts[0]?.state.status[id],
@@ -1,9 +1,18 @@
-import { fileURLToPath } from "node:url"
-import type { Owner } from "solid-js"
-import type { Context, Contract, DialogHandle, Dialogs, SessionRef } from "@opencode/gui-extensions/sdk"
-import { expect, story } from "../../storybook/playwright/story"
+import type { Component, Owner } from "solid-js"
+import type {
+  Context,
+  Contract,
+  DialogHandle,
+  Dialogs,
+  Live,
+  PanelTab,
+  SessionRef,
+  SessionScreen,
+} from "@opencode/gui-extensions/sdk"
+import type { Bridge, BridgeMessage, EnableState, Installed } from "@opencode/gui-extensions/sdk/bridge"
+import { expect, sourceURL, story } from "../../storybook/playwright/story"

-const fixture = `/@fs/${fileURLToPath(new URL("./extension-host.fixture.tsx", import.meta.url)).replaceAll("\\", "/")}`
+const fixture = sourceURL(new URL("./extension-host.fixture.tsx", import.meta.url))

 /** What the scoped-registration case keeps from inside its extension. */
 type Scope = { owner?: Owner | null; end: () => void; ctx?: Context }
@@ -34,29 +43,32 @@ story("an extension that finishes loading after the host unmounts is never set u
  expect(setups).toBe(0)
 })

-story("an async setup that resolves after the host unmounts releases everything it registers", async ({ page }) => {
+story("async work from synchronous setup cannot register after the host unmounts", async ({ page }) => {
  const result = await page.evaluate(async (fixture) => {
    const { mountExtensionHost, onCleanup } = await import(fixture)
    const host = mountExtensionHost()
    const started = Promise.withResolvers<void>()
    const resume = Promise.withResolvers<void>()
+    const done = Promise.withResolvers<void>()
    const cleaned: string[] = []
    const point = { kind: "point" as const, id: "fixture-point" }
    const resumed = { aborted: false }
-    host.load(async (ctx: Context) => {
+    host.load((ctx: Context) => {
      ctx.add(point, "before")
      onCleanup(() => void cleaned.push("owner"))
      started.resolve()
-      await resume.promise
-      // After an await there is no owner: the signal tells the setup it outlived its instance.
-      resumed.aborted = ctx.signal.aborted
-      ctx.add(point, "after")
+      void resume.promise.then(() => {
+        // A promise callback has no owner; the signal says the work outlived the instance.
+        resumed.aborted = ctx.signal.aborted
+        ctx.add(point, "after")
+        done.resolve()
+      })
    })
    await started.promise
    const before = host.entries(point.id)
    host.unmount()
    resume.resolve()
-    await new Promise((resolve) => setTimeout(resolve, 100))
+    await done.promise

    return { before, after: host.entries(point.id), cleaned, aborted: resumed.aborted }
  }, fixture)
@@ -184,17 +196,23 @@ story(
    const result = await page.evaluate(async (fixture) => {
      const { mountSessionRegion, until, Panel, Slot } = await import(fixture)
      const mounts = { single: 0, grouped: 0, slot: 0 }
-      const inputs: Partial<Record<keyof typeof mounts, { readonly session: { readonly id: string } }>> = {}
+
+      const inputs: Partial<
+        Record<keyof typeof mounts, { readonly session: { readonly id: string }; readonly screen: SessionScreen }>
+      > = {}
+
      const kept: Kept = {}
      const node = () => document.createElement("p")

      // One render of each kind the host has: a selected tab, a group that stays mounted, and a slot.
-      const render = (kind: keyof typeof mounts) => (input: { readonly session: { readonly id: string } }) => {
-        mounts[kind]++
-        inputs[kind] = input
+      const render =
+        (kind: keyof typeof mounts) =>
+        (input: { readonly session: { readonly id: string }; readonly screen: SessionScreen }) => {
+          mounts[kind]++
+          inputs[kind] = input

-        return node()
-      }
+          return node()
+        }

      const host = mountSessionRegion({
        active: "single:main",
@@ -231,9 +249,13 @@ story(
      const seen = () => ({
        mounts: { ...mounts },
        sessions: [inputs.single?.session.id, inputs.grouped?.session.id, inputs.slot?.session.id],
+        screens: [inputs.single?.screen === screen, inputs.grouped?.screen === screen, inputs.slot?.screen === screen],
        kept: session?.id,
        fresh: kept.ctx?.sessions.current() !== session,
-        screen: { same: kept.ctx?.screen.current() === screen, session: screen?.session?.id },
+        screen: {
+          same: kept.ctx?.screen.current() === screen,
+          aligned: !!kept.ctx?.screen.current() === !!kept.ctx?.sessions.current(),
+        },
      })

      const steps = [seen()]
@@ -243,21 +265,28 @@ story(
      screen?.composer.attach({ type: "file", path: "notes.md" })
      host.route("a")
      steps.push(seen())
+      host.leave()
+      const home = seen()
      host.unmount()

-      return { steps, attached: host.attached }
+      return { steps, home, attached: host.attached }
    }, fixture)

    const step = (id: string, fresh: boolean) => ({
      mounts: { single: 1, grouped: 1, slot: 1 },
      sessions: [id, id, id],
+      screens: [true, true, true],
      kept: "a",
      fresh,
-      screen: { same: true, session: id },
+      screen: { same: true, aligned: true },
    })

    // Routing A again makes a new object for the new visit; the kept one still names A.
-    expect(result).toEqual({ steps: [step("a", false), step("b", true), step("a", true)], attached: ["b"] })
+    expect(result).toEqual({
+      steps: [step("a", false), step("b", true), step("a", true)],
+      home: { ...step("a", true), screen: { same: false, aligned: true } },
+      attached: ["b"],
+    })
  },
 )

@@ -296,7 +325,9 @@ story(
                  scope: { server: "local" },
                })

-                prefs.update((draft) => ({ count: draft.count + 1 }))
+                prefs.update((draft) => {
+                  draft.count++
+                })
                reads.state = createMemo(() => ctx.layout.state("fixture:main", session))
                reads.font = createMemo(() => ctx.appearance.font("mono"))
                reads.prefs = prefs
@@ -341,6 +372,84 @@ story(
  },
 )

+// Selection follows opt-in tier order, not the strip's pinned-first order. Unrelated regular tabs never opt in.
+const tiers: readonly { name: string; tabs: readonly PanelTab[]; active?: string; expected: string }[] = [
+  {
+    name: "regular tabs, in stored order",
+    tabs: [
+      { id: "details", title: "Details" },
+      { id: "review", title: "Review", pinned: true, fallback: true },
+      { id: "context", title: "Context", first: true, fallback: true },
+      { id: "file-one", title: "File one", fallback: true },
+      { id: "file-two", title: "File two", fallback: true },
+    ],
+    expected: "file-one",
+  },
+  {
+    name: "first tabs before pinned tabs",
+    tabs: [
+      { id: "details", title: "Details" },
+      { id: "review", title: "Review", pinned: true, fallback: true },
+      { id: "context", title: "Context", first: true, fallback: true },
+    ],
+    expected: "context",
+  },
+  {
+    name: "pinned tabs when no other tier opts in",
+    tabs: [
+      { id: "details", title: "Details" },
+      { id: "review", title: "Review", pinned: true, fallback: true },
+    ],
+    expected: "review",
+  },
+  {
+    name: "no implicit fallback",
+    tabs: [{ id: "details", title: "Details", fallback: false }],
+    expected: "",
+  },
+  {
+    name: "a stored selection wins without opting in",
+    tabs: [
+      { id: "details", title: "Details" },
+      { id: "file", title: "File", fallback: true },
+    ],
+    active: "details:main",
+    expected: "details",
+  },
+]
+
+tiers.forEach((row) => {
+  story(`panel fallback: ${row.name}`, async ({ page }) => {
+    const selected = await page.evaluate(
+      async (input) => {
+        const { mountSessionRegion, Panel, until } = await import(input.fixture)
+
+        const host = mountSessionRegion({
+          active: input.row.active ?? "gone:main",
+          definitions: input.row.tabs.map((tab) => ({
+            id: tab.id,
+            renderer: async () => ({
+              default: (ctx: Context) => {
+                const item = { ...tab, id: "main" }
+                ctx.add(Panel, { id: "main", region: "side", list: () => [item], render: () => ctx.id })
+              },
+            }),
+          })),
+        })
+
+        await until(() => input.row.tabs.every((tab) => host.status(tab.id) === "active"))
+        const result = host.container.textContent
+        host.unmount()
+
+        return result
+      },
+      { fixture, row },
+    )
+
+    expect(selected).toBe(row.expected)
+  })
+})
+
 story("an extension reloaded while disabled starts when it is enabled again", async ({ page }) => {
  const result = await page.evaluate(async (fixture) => {
    const { mountExtensionHost } = await import(fixture)
@@ -496,11 +605,27 @@ story("an extension that requires a contract starts once it is active and restar
    ]

    // Hard contracts gate startup: a consumer whose provider is disabled settles the gate without starting.
-    const gated = mountExtensions({ definitions, disabled: ["provider"] })
+    const gated = mountExtensions({ definitions: [definitions[1], definitions[0]], disabled: ["provider"] })
    await until(() => gated.ready())
    const blocked = { status: gated.status("consumer"), log: [...log] }
    gated.unmount()

+    const failed = mountExtensions({
+      definitions: [
+        {
+          ...definitions[0],
+          renderer: async () => {
+            throw new Error("provider failed")
+          },
+        },
+        definitions[1],
+      ],
+    })
+
+    await until(() => failed.ready())
+    const failedProvider = { status: failed.status("consumer"), log: [...log] }
+    failed.unmount()
+
    const host = mountExtensions({ definitions })
    await new Promise((resolve) => setTimeout(resolve, 50))
    const waiting = { status: host.status("consumer"), log: [...log] }
@@ -510,17 +635,232 @@ story("an extension that requires a contract starts once it is active and restar
    await until(() => log.length === 3)
    host.disable(["provider"])
    await until(() => log.length === 4)
-    const outcome = { blocked, waiting, log, after: host.status("consumer") }
+    const outcome = { blocked, failedProvider, waiting, log, after: host.status("consumer") }
    host.unmount()

    return outcome
  }, fixture)

  expect(result).toEqual({
-    blocked: { status: "loading", log: [] },
+    blocked: { status: "blocked", log: [] },
+    failedProvider: { status: "blocked", log: [] },
    waiting: { status: "loading", log: [] },
    log: ["setup 1", "cleanup 1", "setup 2", "cleanup 2"],
-    after: "loading",
+    after: "blocked",
+  })
+})
+
+story("a contract component reads its provider context and preserves reactive props", async ({ page }) => {
+  const result = await page.evaluate(async (fixture) => {
+    const { bindExtension, createComponent, createSignal, Contract, mountExtensions, Slot, until, useExtension } =
+      await import(fixture)
+
+    const View: Contract<{ View: Component<{ readonly label: string }> }, "provider.view"> =
+      Contract.define("provider.view")
+
+    const observed = { context: "", read: () => "", change: () => {}, mounts: 0 }
+
+    const host = mountExtensions({
+      definitions: [
+        {
+          id: "provider",
+          provides: { view: View },
+          renderer: async () => ({
+            default: (ctx: Context) => {
+              ctx.provide(View, {
+                View: bindExtension((props: { readonly label: string }) => {
+                  observed.context = useExtension().id
+                  observed.read = () => props.label
+                  observed.mounts++
+
+                  return document.createTextNode(observed.context)
+                }),
+              })
+            },
+          }),
+        },
+        {
+          id: "consumer",
+          requires: { view: View },
+          renderer: async () => ({
+            default: (ctx: Context & { requires: { view: { View: Component<{ readonly label: string }> } } }) => {
+              const [label, setLabel] = createSignal("before")
+              observed.change = () => setLabel("after")
+              ctx.add(Slot, {
+                at: "window.bottom",
+                render: () =>
+                  createComponent(ctx.requires.view.View, {
+                    get label() {
+                      return label()
+                    },
+                  }),
+              })
+            },
+          }),
+        },
+      ],
+    })
+
+    await until(() => host.container.textContent === "provider")
+    const before = observed.read()
+    observed.change()
+    const outcome = { context: observed.context, mounts: observed.mounts, before, after: observed.read() }
+    host.unmount()
+
+    return outcome
+  }, fixture)
+
+  expect(result).toEqual({ context: "provider", mounts: 1, before: "before", after: "after" })
+})
+
+story("developer settings show a blocked hard dependency instead of loading forever", async ({ page }, info) => {
+  await page.evaluate(async (fixture) => {
+    const { Contract, mountExtensions, until } = await import(fixture)
+    const Tree = Contract.define("provider.tree")
+
+    const host = mountExtensions({
+      settings: true,
+      disabled: ["provider"],
+      definitions: [
+        { id: "provider", provides: { tree: Tree }, renderer: async () => ({ default: () => {} }) },
+        { id: "consumer", requires: { tree: Tree }, renderer: async () => ({ default: () => {} }) },
+      ],
+    })
+
+    await until(() => !!host.container.textContent?.includes("consumer"))
+  }, fixture)
+  const settings = page.getByRole("region", { name: "Extensions", exact: true })
+  await settings.screenshot({ path: info.outputPath("requires-status.png") })
+  await expect(settings.getByText("Blocked", { exact: true })).toBeVisible()
+  await expect(settings.getByText("Loading", { exact: true })).toHaveCount(0)
+})
+
+story("blocked chains expose their own reason and recover regardless of definition order", async ({ page }) => {
+  const result = await page.evaluate(async (fixture) => {
+    const { Contract, mountExtensions, until } = await import(fixture)
+    const Root: Contract<number, "root.value"> = Contract.define("root.value")
+    const Branch: Contract<number, "branch.value"> = Contract.define("branch.value")
+    const observed = { read: (): Live<number> => ({ status: "pending" }), starts: 0 }
+
+    const host = mountExtensions({
+      disabled: ["root"],
+      definitions: [
+        {
+          id: "leaf",
+          requires: { branch: Branch },
+          renderer: async () => ({
+            default: () => {
+              observed.starts++
+            },
+          }),
+        },
+        {
+          id: "observer",
+          uses: { branch: Branch },
+          renderer: async () => ({
+            default: (ctx: Context & { uses: { branch: () => Live<number> } }) => {
+              observed.read = ctx.uses.branch
+            },
+          }),
+        },
+        {
+          id: "branch",
+          requires: { root: Root },
+          provides: { branch: Branch },
+          renderer: async () => ({ default: (ctx: Context) => void ctx.provide(Branch, 2) }),
+        },
+        {
+          id: "root",
+          provides: { root: Root },
+          renderer: async () => ({ default: (ctx: Context) => void ctx.provide(Root, 1) }),
+        },
+      ],
+    })
+
+    await until(() => host.ready())
+
+    const blocked = {
+      branch: host.status("branch"),
+      leaf: host.status("leaf"),
+      live: observed.read(),
+      starts: observed.starts,
+    }
+
+    host.disable([])
+    await until(() => host.status("leaf") === "active")
+    const recovered = { live: observed.read(), starts: observed.starts }
+    host.unmount()
+
+    return { blocked, recovered }
+  }, fixture)
+
+  expect(result).toEqual({
+    blocked: { branch: "blocked", leaf: "blocked", live: { status: "inactive", reason: "blocked" }, starts: 0 },
+    recovered: { live: { status: "active", value: 2, generation: 1 }, starts: 1 },
+  })
+})
+
+const invalidSetups = ["promise", "thenable"]
+
+invalidSetups.forEach((kind) => {
+  story(`window setup rejects a returned ${kind}`, async ({ page }) => {
+    const result = await page.evaluate(
+      async (input) => {
+        const { mountExtensions, until } = await import(input.fixture)
+        const resume = Promise.withResolvers<void>()
+        const done = Promise.withResolvers<void>()
+        const point = { kind: "point" as const, id: "invalid-setup" }
+        const observed = { aborted: false }
+
+        const host = mountExtensions({
+          definitions: [
+            {
+              id: "invalid",
+              renderer: async () => ({
+                default: (ctx: Context) => {
+                  ctx.add(point, "before")
+
+                  if (input.kind === "thenable")
+                    return {
+                      then(resolve: () => void) {
+                        resolve()
+                      },
+                    }
+
+                  return resume.promise.then(() => {
+                    observed.aborted = ctx.signal.aborted
+                    ctx.add(point, "after")
+                    done.resolve()
+                  })
+                },
+              }),
+            },
+          ],
+        })
+
+        await until(() => host.ready())
+
+        const failed = {
+          status: host.status("invalid"),
+          error: host.failure("invalid")?.error.includes("Window setup must be synchronous"),
+          entries: host.entries(point.id),
+        }
+
+        resume.resolve()
+
+        if (input.kind === "promise") await done.promise
+        const after = { entries: host.entries(point.id), aborted: observed.aborted }
+        host.unmount()
+
+        return { failed, after }
+      },
+      { fixture, kind },
+    )
+
+    expect(result).toEqual({
+      failed: { status: "failed", error: true, entries: 0 },
+      after: { entries: 0, aborted: kind === "promise" },
+    })
  })
 })

@@ -556,3 +896,158 @@ story("declared global stores load before setup, so setup reads the stored value

  expect(result).toEqual({ held: { status: "loading", seen: [] }, seen: [true] })
 })
+
+story("startup enable state does not wait for the manager, and live updates beat older replies", async ({ page }) => {
+  const result = await page.evaluate(async (fixture) => {
+    const { Contract, mountExtensions, until } = await import(fixture)
+    const Provider: Contract<number, "disabled.value"> = Contract.define("disabled.value")
+    const Dependent: Contract<number, "dependent.value"> = Contract.define("dependent.value")
+    const observed = { read: (): Live<number> => ({ status: "pending" }) }
+    const initial = Promise.withResolvers<readonly EnableState[]>()
+    const reply = Promise.withResolvers<readonly Installed[]>()
+    const listeners = new Set<(message: BridgeMessage) => void>()
+    const setups: string[] = []
+
+    const list = (disabled: readonly string[]): Installed[] =>
+      ["dependent", "enabled", "disabled"].map((id) => ({
+        id,
+        name: id,
+        version: "1",
+        builtin: true,
+        enabled: !disabled.includes(id),
+      }))
+
+    const bridge: Bridge = {
+      packaged: false,
+      call: async () => undefined,
+      subscribe: async () => ({ available: false }),
+      on: (listener) => {
+        listeners.add(listener)
+
+        return () => void listeners.delete(listener)
+      },
+      embed() {},
+      capture: async () => undefined,
+      runMenubarItem() {},
+      configure() {},
+      manager: {
+        initial: initial.promise,
+        list: () => reply.promise,
+        enable: async () => {},
+        disable: async () => {},
+        reload: async () => {},
+        install: async () => {},
+        remove: async () => {},
+        source: async () => "",
+        asset: () => "",
+      },
+    }
+
+    const host = mountExtensions({
+      bridge,
+      // The consumer comes first; the provider's old-id setting arrives asynchronously from the preload.
+      definitions: [
+        {
+          id: "dependent",
+          requires: { provider: Provider },
+          provides: { value: Dependent },
+          renderer: async () => ({
+            default: (ctx: Context) => {
+              setups.push("dependent")
+              ctx.provide(Dependent, 2)
+            },
+          }),
+        },
+        {
+          id: "enabled",
+          uses: { value: Dependent },
+          renderer: async () => ({
+            default: (ctx: Context & { uses: { value: () => Live<number> } }) => {
+              setups.push("enabled")
+              observed.read = ctx.uses.value
+            },
+          }),
+        },
+        {
+          id: "disabled",
+          legacy: ["previous"],
+          provides: { value: Provider },
+          renderer: async () => ({
+            default: (ctx: Context) => {
+              setups.push("disabled")
+              ctx.provide(Provider, 1)
+            },
+          }),
+        },
+      ],
+    })
+
+    await new Promise((resolve) => setTimeout(resolve, 50))
+    const before = [...setups]
+    initial.resolve([{ id: "previous", enabled: false }])
+    await until(() => host.ready())
+
+    const started = {
+      setups: [...setups],
+      status: host.status("disabled"),
+      dependent: host.status("dependent"),
+      live: observed.read(),
+    }
+
+    const unknown: { ready: boolean; setups: string[]; status?: string }[] = []
+
+    // A failed startup reply must not temporarily activate the disabled extension while list() waits.
+    for (const failure of ["unknown", "rejected"]) {
+      const initial = failure === "unknown" ? Promise.resolve(undefined) : Promise.reject(new Error("snapshot failed"))
+      const reply = Promise.withResolvers<readonly Installed[]>()
+
+      const failed = mountExtensions({
+        bridge: { ...bridge, manager: { ...bridge.manager, initial, list: () => reply.promise } },
+        definitions: [{ id: "disabled", renderer: async () => ({ default: () => void setups.push("wrongly enabled") }) }],
+      })
+
+      await new Promise((resolve) => setTimeout(resolve, 50))
+      const blocked = { ready: failed.ready(), setups: [...setups] }
+
+      reply.resolve(list(["disabled"]))
+      await until(() => failed.ready())
+      unknown.push({ ...blocked, status: failed.status("disabled") })
+      failed.unmount()
+    }
+
+    listeners.forEach((listener) => listener({ type: "extensions", list: list(["enabled"]) }))
+    await until(
+      () =>
+        host.status("disabled") === "active" &&
+        host.status("enabled") === "disabled" &&
+        host.status("dependent") === "active",
+    )
+    reply.resolve(list(["disabled"]))
+    await new Promise((resolve) => setTimeout(resolve, 50))
+
+    const updated = {
+      setups: [...setups],
+      status: [host.status("enabled"), host.status("disabled"), host.status("dependent")],
+    }
+
+    host.unmount()
+
+    return { before, started, unknown, updated, listeners: listeners.size }
+  }, fixture)
+
+  expect(result).toEqual({
+    before: [],
+    started: {
+      setups: ["enabled"],
+      status: "disabled",
+      dependent: "blocked",
+      live: { status: "inactive", reason: "blocked" },
+    },
+    unknown: [
+      { ready: false, setups: ["enabled"], status: "disabled" },
+      { ready: false, setups: ["enabled"], status: "disabled" },
+    ],
+    updated: { setups: ["enabled", "disabled", "dependent"], status: ["disabled", "active", "active"] },
+    listeners: 0,
+  })
+})
@@ -15,21 +15,25 @@ export function mountTimelineVirtualizer(input: { count: number; rowHeight: numb

  function Fixture() {
    const [state, setState] = createStore({ pinned: true, ready: false })
+
    const rows = Array.from(
      { length: input.count },
      (_, index) => new TimelineRow.UserMessage({ userMessageID: `message-${index}` }),
    )
+
    const rowByKey = new Map(rows.map((row) => [TimelineRow.key(row), row]))
    const indexes = new Map(rows.map((row, index) => [row.userMessageID, index]))
    let viewport!: HTMLDivElement
    let content!: HTMLDivElement
    let container!: HTMLDivElement
+
    const timeline = createTimelineVirtualizer({
      sessionKey: () => "cold-reveal-fixture",
      projection: {
        rows: () => rows,
        rowByKey: () => rowByKey,
        activeMessageID: () => undefined,
+        messageByID: () => new Map(),
        messageRowIndex: () => indexes,
        messageLastRowIndex: () => indexes,
      },
@@ -62,6 +66,7 @@ export function mountTimelineVirtualizer(input: { count: number; rowHeight: numb
      host.dataset.observedHeight = String(entries[0].borderBoxSize[0].blockSize)
      host.dataset.viewportResizes = String(Number(host.dataset.viewportResizes) + 1)
    })
+
    const reveal = new MutationObserver(() => {
      if (content.style.visibility === "hidden" || host.dataset.firstReveal) return
      // Capture the first reveal, not a later frame after geometry has recovered.
@@ -71,11 +76,14 @@ export function mountTimelineVirtualizer(input: { count: number; rowHeight: numb
        pendingMarkdown: content.querySelectorAll('[data-component="markdown"]:not([data-markdown-ready])').length,
        viewportHeight: viewport.clientHeight,
        scrollTop: viewport.scrollTop,
-        clipped: mounted
-          .filter((element) => element.firstElementChild!.getBoundingClientRect().height > element.offsetHeight + 1)
-          .map((element) => element.dataset.timelineKey),
+        clipped: mounted.flatMap((element) =>
+          element.firstElementChild!.getBoundingClientRect().height > element.offsetHeight + 1
+            ? [element.dataset.timelineKey]
+            : [],
+        ),
      })
    })
+
    onCleanup(() => {
      resize.disconnect()
      reveal.disconnect()
@@ -1,7 +1,6 @@
-import { fileURLToPath } from "node:url"
-import { expect, story } from "../../storybook/playwright/story"
+import { expect, sourceURL, story } from "../../storybook/playwright/story"

-const fixture = `/@fs/${fileURLToPath(new URL("./timeline-virtualizer.fixture.tsx", import.meta.url)).replaceAll("\\", "/")}`
+const fixture = sourceURL(new URL("./timeline-virtualizer.fixture.tsx", import.meta.url))

 story.beforeEach(async ({ mount }) => {
  const component = await mount("opencode-composer-flow--mixed-attachments")
@@ -7,6 +7,7 @@ test.use({ permissions: ["clipboard-read", "clipboard-write"] })
 async function draft(page: Page) {
  const { editor } = await openDraft(page, { name: "ComposerDraft", provider: NO_PROVIDER })
  await editor.click()
+
  return editor
 }

@@ -15,9 +16,11 @@ async function expectCaretVisible(input: Locator) {
    .poll(() =>
      input.evaluate((element) => {
        const selection = window.getSelection()
+
        if (!selection?.isCollapsed || !selection.rangeCount || !element.contains(selection.anchorNode)) return false
        const caret = selection.getRangeAt(0).getBoundingClientRect()
        const viewport = (element.closest("[data-scrollable]") ?? element).getBoundingClientRect()
+
        return caret.height > 0 && caret.top >= viewport.top - 1 && caret.bottom <= viewport.bottom + 1
      }),
    )
@@ -28,11 +31,14 @@ test("keeps a 25000-line crash report editable in a new session", async ({ page
  const input = await draft(page)
  const text = "Thread 0 Crashed:\n" + "0   Example  0x0000000100000000 frame + 32\n".repeat(25000) + "End of report"
  await page.evaluate((text) => navigator.clipboard.writeText(text), text)
+
  const events = await input.evaluateHandle((element) => {
    const events = { count: 0 }
    element.addEventListener("input", () => events.count++)
+
    return events
  })
+
  await page.keyboard.press("ControlOrMeta+V")
  await expect.poll(async () => (await input.innerText()) === text).toBe(true)
  expect(await events.evaluate((events) => events.count)).toBe(1)
@@ -46,6 +52,7 @@ test("keeps a 25000-line crash report editable in a new session", async ({ page
  await expectCaretVisible(input)
  const thumb = await scroll.locator(".scroll-view__thumb").boundingBox()
  const bounds = await scroll.boundingBox()
+
  if (!thumb || !bounds) throw new Error("Missing composer scrollbar bounds")
  await page.mouse.move(thumb.x + thumb.width / 2, thumb.y + thumb.height / 2)
  await page.mouse.down()
@@ -58,6 +65,26 @@ test("keeps a 25000-line crash report editable in a new session", async ({ page
  await expectCaretVisible(input)
 })

+test("a key-up never moves the caret back after later navigation", async ({ page }) => {
+  const input = await draft(page)
+  await input.pressSequentially("first line")
+  await expect(input).toHaveText("first line")
+
+  // Navigation can land before the next frame; the cursor a key-up recorded must not overwrite it there.
+  const offset = await input.evaluate(async (element) => {
+    const text = document.createTreeWalker(element, NodeFilter.SHOW_TEXT).nextNode()!
+    const selection = window.getSelection()!
+    selection.collapse(text, 0)
+    element.dispatchEvent(new KeyboardEvent("keyup", { key: "Home", bubbles: true }))
+    selection.collapse(text, text.textContent!.length)
+    await new Promise((resolve) => requestAnimationFrame(() => requestAnimationFrame(resolve)))
+
+    return selection.anchorOffset
+  })
+
+  expect(offset).toBe("first line".length)
+})
+
 for (const [width, direction] of [
  [390, "rtl"],
  [1280, "ltr"],
@@ -83,6 +110,7 @@ for (const [width, direction] of [

 test("pastes plain text without markup and keeps native undo", async ({ page }) => {
  const input = await draft(page)
+
  for (const text of [
    "single line <b> &amp;",
    "first\nsecond",
@@ -110,13 +138,16 @@ test("replaces only the selected text and leaves the caret after the paste", asy
  await page.keyboard.type("before replace after")
  await expect(input).toHaveText("before replace after")
  await page.evaluate(() => document.fonts.ready)
+
  const word = await input.evaluate((element) => {
    const range = document.createRange()
    range.setStart(element.firstChild!, 7)
    range.setEnd(element.firstChild!, 14)
    const rect = range.getBoundingClientRect()
+
    return { x: rect.x, y: rect.y + rect.height / 2, width: rect.width }
  })
+
  await page.mouse.move(word.x, word.y)
  await page.mouse.down()
  await page.mouse.move(word.x + word.width, word.y, { steps: 5 })
@@ -141,9 +172,11 @@ test("shows the dropzone and attaches a dropped file", async ({ page }) => {
  })
  const surface = page.locator('[data-component="new-session"]')
  const dropzone = page.locator('[data-component="session-dropzone"]')
+
  const transfer = await page.evaluateHandle(() => {
    const value = new DataTransfer()
    value.items.add(new File(["Dropzone fixture"], "dropzone.txt", { type: "text/plain" }))
+
    return value
  })

@@ -194,6 +227,7 @@ test("lists slash commands in their built-in order", async ({ page }) => {
    // A sent message enables /undo, /compact and /fork.
    pageMessages: () => ({ items: [{ id: "msg_slash", type: "user", text: "Hello", time: { created: T0 } }] }),
  })
+
  await editor.fill("/")
  await expect(page.locator('[data-component="composer-suggestions"] [data-suggestion-id] bdi')).toHaveText([
    "/init",
@@ -213,6 +247,7 @@ test("lists slash commands in their built-in order", async ({ page }) => {
 })

 const followUp = "Add follow-up, / for commands, @ for context…"
+
 for (const row of [
  { state: "an idle", copy: "Ask anything, / for commands, @ for context…" },
  { state: "a running", copy: followUp, sessionStatus: { ses_placeholder: { type: "running" } } },
@@ -238,6 +273,7 @@ for (const row of [
      sessionStatus: row.sessionStatus,
      inbox: row.inbox,
    })
+
    const scroll = page.locator('[data-component="composer-scroll"]')
    await expect(scroll).toHaveText(row.copy)
    await editor.pressSequentially("!")
@@ -250,6 +286,7 @@ test("shows thinking on hover or a non-default selection while preserving keyboa
    name: "ComposerThinking",
    provider: provider({ id: "thinking-model", name: "Thinking Model", variants: { high: {} } }),
  })
+
  const composer = page.locator('[data-component="composer"]')
  const control = composer.getByRole("button", { name: "Choose model variant" })
  const option = (name: string) => page.getByRole("menuitemradio", { name, exact: true })
@@ -1,7 +1,7 @@
 import type { OpenCodeEvent, SessionMessageInfo } from "@opencode/client/promise"
 import { expect, test, type Locator, type Page } from "@playwright/test"
 import { base64Encode } from "@opencode/util/encode"
-import { SERVER, project, provider, session, workspaceKey } from "../utils/app"
+import { SERVER, holdRoute, project, provider, session, workspaceKey } from "../utils/app"
 import { mockOpenCodeServer } from "../utils/mock-server"
 import { fileDiff, fileNode, openSession } from "../utils/workspace"
 import { expectSessionTitle } from "../utils/waits"
@@ -33,6 +33,85 @@ for (const view of ["desktop", "mobile"] as const) {
  })
 }

+test("Git initialization belongs to its session and refreshes after a session switch", async ({ page }) => {
+  const requests: { directory: string; provider?: string }[] = []
+
+  const workspace = await openSession(page, {
+    name: "ReviewInitSwitch",
+    project: { vcs: undefined },
+    onVcsInit: (input) => requests.push(input),
+    sessions: [
+      { id: "ses_init_a", title: "Initialize Alpha" },
+      { id: "ses_init_b", title: "Initialize Beta" },
+    ],
+    seed: { panes: { ses_init_a: { review: true }, ses_init_b: { review: true } } },
+  })
+
+  // The successful init finishes while another session is routed.
+  const request = await holdRoute(page, (url) => url.pathname === "/api/vcs/init", { method: "POST" })
+  const panel = page.locator("#review-panel")
+  const init = panel.getByRole("button", { name: "Create Git repository", exact: true })
+  const pending = panel.getByRole("button", { name: "Creating Git repository…", exact: true })
+  await expect(init).toBeEnabled()
+  await init.click()
+  await request.arrived
+  await expect(pending).toBeDisabled()
+
+  await page.locator("[data-titlebar-tab-slot]", { hasText: "Initialize Beta" }).click()
+  await expectSessionTitle(page, "Initialize Beta")
+  await expect(init).toBeEnabled()
+  await expect(pending).toHaveCount(0)
+
+  await page.locator("[data-titlebar-tab-slot]", { hasText: "Initialize Alpha" }).click()
+  await expectSessionTitle(page, "Initialize Alpha")
+  await expect(pending).toBeDisabled()
+  await page.locator("[data-titlebar-tab-slot]", { hasText: "Initialize Beta" }).click()
+  await expectSessionTitle(page, "Initialize Beta")
+  await expect(init).toBeEnabled()
+
+  const response = page.waitForResponse((item) => new URL(item.url()).pathname === "/api/vcs/init")
+  // The worktree event can refresh project-wide UI by itself; the completed action must also reload Alpha's cache.
+  const refreshed = page.waitForResponse((item) => new URL(item.url()).pathname === "/api/session/ses_init_a")
+  request.release()
+  expect((await response).status()).toBe(204)
+  expect((await refreshed).status()).toBe(200)
+  expect(requests).toEqual([{ directory: workspace.directory, provider: "git" }])
+  await expect(panel.getByRole("button", { name: "Git changes", exact: true })).toBeVisible()
+  await expect(init).toHaveCount(0)
+  await expect(page.getByText("Request failed", { exact: true })).toHaveCount(0)
+
+  await page.locator("[data-titlebar-tab-slot]", { hasText: "Initialize Alpha" }).click()
+  await expectSessionTitle(page, "Initialize Alpha")
+  await expect(panel.getByRole("button", { name: "Git changes", exact: true })).toBeVisible()
+  await expect(pending).toHaveCount(0)
+})
+
+test("a rejected Git init releases its session's button without showing an error in another session", async ({ page }) => {
+  await openSession(page, {
+    name: "ReviewInitFailure",
+    project: { vcs: undefined },
+    sessions: [
+      { id: "ses_init_failure_a", title: "Initialize Alpha" },
+      { id: "ses_init_failure_b", title: "Initialize Beta" },
+    ],
+    seed: { panes: { ses_init_failure_a: { review: true }, ses_init_failure_b: { review: true } } },
+  })
+  const request = await holdRoute(page, (url) => url.pathname === "/api/vcs/init", { method: "POST" })
+  const init = page.locator("#review-panel").getByRole("button", { name: "Create Git repository", exact: true })
+  await init.click()
+  await request.arrived
+  await page.locator("[data-titlebar-tab-slot]", { hasText: "Initialize Beta" }).click()
+  await expectSessionTitle(page, "Initialize Beta")
+  await expect(init).toBeEnabled()
+  const response = page.waitForResponse((item) => new URL(item.url()).pathname === "/api/vcs/init")
+  request.release()
+  expect((await response).status()).toBe(501)
+  await expect(page.getByText("Request failed", { exact: true })).toHaveCount(0)
+  await page.locator("[data-titlebar-tab-slot]", { hasText: "Initialize Alpha" }).click()
+  await expectSessionTitle(page, "Initialize Alpha")
+  await expect(init).toBeEnabled()
+})
+
 test("open file tab browses, searches, and tracks missing files", async ({ page }) => {
  const searches: { query: string; dirs?: string; limit?: number }[] = []
  const directory = "C:/OpenCode/ReviewOpenFile"
@@ -754,6 +833,32 @@ test("a chosen mode the session stops offering shows as Git, and comes back when
  await expect(file).toHaveText("beta.ts")
 })

+test("names a single change source and keeps the review header rows at 48px", async ({ page }) => {
+  // Turn changes are offered only for Git, so another VCS offers one source.
+  await openSession(page, { name: "ReviewHeader", project: { vcs: "hg" }, vcsDiff: [fileDiff("src/alpha.ts")] })
+  await page.getByRole("button", { name: "Toggle review", exact: true }).click()
+  const panel = page.locator("#review-panel")
+  const toggle = panel.getByRole("button", { name: "Toggle file tree" })
+  const header = panel.locator('[data-slot="session-review-v2-sidebar-header"]')
+  const toolbar = panel.locator('[data-slot="session-review-v2-toolbar"]')
+
+  await expect(header.getByText("Git changes", { exact: true })).toBeVisible()
+  await expect(panel.getByRole("button", { name: "Git changes" })).toHaveCount(0)
+  await expect(toggle).toHaveAttribute("aria-expanded", "true")
+  await expect(header).toHaveCSS("height", "48px")
+  await expect(toolbar).toHaveCSS("height", "48px")
+
+  await toggle.click()
+  await expect(toggle).toHaveAttribute("aria-expanded", "false")
+  await expect(toolbar.getByText("Git changes", { exact: true })).toBeVisible()
+  await expect(toolbar).toHaveCSS("height", "48px")
+
+  await toggle.click()
+  await expect(toggle).toHaveAttribute("aria-expanded", "true")
+  await expect(header).toHaveCSS("height", "48px")
+  await expect(toolbar).toHaveCSS("height", "48px")
+})
+
 for (const direction of ["ltr", "rtl"] as const) {
  test(`review toggle stays at the header edge in ${direction}`, async ({ page }) => {
    await page.setViewportSize({ width: 1000, height: 900 })
@@ -29,12 +29,14 @@ for (const direction of ["ltr", "rtl"] as const) {
    await expect(page.locator('[data-slot="titlebar-v2"]').getByRole("button", { name: "Status" })).toHaveCount(0)
    const titleBounds = await header.getByRole("heading").boundingBox()
    expect(titleBounds).not.toBeNull()
+
    for (const editing of [false, true]) {
      if (editing) {
        await header.getByRole("heading").click()
        await expect(header.getByRole("textbox")).toHaveValue(fixture.expected.targetTitle)
        await expect(header.getByRole("textbox")).toBeFocused()
      }
+
      await expect(header.locator('[data-slot="session-title-child"]')).toHaveCSS("padding-left", "4px")
      await expect(header.locator('[data-slot="session-title-child"]')).toHaveCSS("padding-right", "4px")
      await expect
@@ -44,8 +46,11 @@ for (const direction of ["ltr", "rtl"] as const) {
              control.boundingBox(),
            ),
          )
+
          if (!icon || !title || !menu || !sidebar || !summary || !titleBounds) return false
+
          if (Math.abs(title.y - titleBounds.y) > 0.5 || Math.abs(title.height - titleBounds.height) > 0.5) return false
+
          return direction === "ltr"
            ? Math.abs(title.x - icon.x - icon.width - 2) <= 0.5 &&
                Math.abs(menu.x - title.x - title.width - 2) <= 0.5 &&
@@ -58,6 +63,7 @@ for (const direction of ["ltr", "rtl"] as const) {
        })
        .toBe(true)
    }
+
    await header.getByRole("textbox").press("Escape")
    await expect(header.getByRole("heading")).toHaveText(fixture.expected.targetTitle)

@@ -70,6 +76,7 @@ for (const direction of ["ltr", "rtl"] as const) {
    await more.click()
    const options = page.getByRole("menu")
    await expect(options.getByRole("menuitem")).toHaveText(["Rename", "Export…", "Delete…"])
+
    if (direction === "ltr") {
      await expect
        .poll(async () => {
@@ -77,20 +84,24 @@ for (const direction of ["ltr", "rtl"] as const) {
            header.getByRole("button", { name: "More options", exact: true, includeHidden: true }).boundingBox(),
            options.boundingBox(),
          ])
+
          return button && menu ? Math.abs(button.x - menu.x) : Infinity
        })
        .toBeLessThanOrEqual(1)
    }
+
    await expect
      .poll(() =>
        options.evaluate((element) => {
          const menu = element.getBoundingClientRect()
          const rtl = getComputedStyle(element).direction === "rtl"
+
          return Math.min(
            ...Array.from(element.querySelectorAll('[data-slot="menu-v2-item-content"]'), (label) => {
              const range = document.createRange()
              range.selectNodeContents(label)
              const text = range.getBoundingClientRect()
+
              return rtl ? text.left - menu.left : menu.right - text.right
            }),
          )
@@ -103,6 +114,7 @@ for (const direction of ["ltr", "rtl"] as const) {
          const menu = element.getBoundingClientRect()
          const divider = element.querySelector('[data-slot="menu-v2-separator"]')?.getBoundingClientRect()
          const rows = Array.from(element.querySelectorAll('[role="menuitem"]'), (row) => row.getBoundingClientRect())
+
          return (
            !!divider &&
            Math.abs(divider.left - menu.left) <= 0.5 &&
@@ -135,6 +147,7 @@ test.describe("rename", () => {
    renames.length = 0
    page.on("request", (request) => {
      const match = new URL(request.url()).pathname.match(/^\/api\/session\/([^/]+)$/)
+
      if (request.method() === "PATCH" && match) renames.push({ sessionID: match[1]!, body: request.postDataJSON() })
    })
    await mockStressTimeline(page)
@@ -149,8 +162,11 @@ test.describe("rename", () => {
      const input = page.locator('input[data-slot="session-title-child"]')
      await expect(input).toBeFocused()
      await input.fill("Renamed session")
+
      if (commit === "Enter") await input.press("Enter")
+
      if (commit === "blur") await input.press("Tab")
+
      if (commit === "click outside") await page.locator('[data-component="composer-editor"]').click()
      await expect(heading(page, "Renamed session")).toBeVisible()
      await expect(tabs(page).filter({ hasText: "Renamed session" })).toBeVisible()
@@ -252,6 +268,7 @@ test.describe("revert", () => {
    },
    { id: "msg_second", type: "user", text: "Second prompt", time: { created: 4 } },
  ] satisfies SessionMessageInfo[]
+
  const workspace = {
    name: "SessionMessageRevert",
    pageMessages: () => ({ items: messages }),
@@ -260,18 +277,54 @@ test.describe("revert", () => {
  test("reverts directly to the selected user message", async ({ page }) => {
    const staged: { sessionID: string; messageID: string }[] = []
    const { session } = await openSession(page, { ...workspace, onRevertStage: (input) => staged.push(input) })
+    const settles: string[] = []
+    page.on("request", (request) => {
+      const path = new URL(request.url()).pathname
+      const step = ["/interrupt", "/wait", "/revert/stage"].find((suffix) => path.endsWith(`/${session.id}${suffix}`))
+
+      if (step) settles.push(step)
+    })
    const message = page.locator('[data-message-id="msg_second"]')
    await message.hover()
+
    const response = page.waitForResponse(
      (response) =>
        response.request().method() === "POST" &&
        new URL(response.url()).pathname === `/api/session/${session.id}/revert/stage`,
    )
+
    await message.getByRole("button", { name: "Revert message" }).click()
    expect((await response).ok()).toBe(true)

    await expect(page.getByRole("textbox", { name: "Prompt" })).toHaveText("Second prompt")
    expect(staged).toEqual([{ sessionID: session.id, messageID: "msg_second" }])
+    // Interrupt acknowledges before the run settles, and the server refuses to stage while it is active.
+    expect(settles).toEqual(["/interrupt", "/wait", "/revert/stage"])
+  })
+
+  test("redo restores every reverted message at once, as in the TUI", async ({ page }) => {
+    const staged: { sessionID: string; messageID: string }[] = []
+
+    const { editor } = await openSession(page, {
+      ...workspace,
+      sessions: [{ id: "ses_revert_redo", title: "Session message revert", revert: { messageID: "msg_first" } }],
+      onRevertStage: (input) => staged.push(input),
+    })
+
+    const cleared = page.waitForResponse(
+      (response) =>
+        response.request().method() === "DELETE" &&
+        new URL(response.url()).pathname === "/api/session/ses_revert_redo/revert",
+    )
+
+    await editor.pressSequentially("/redo")
+    await expect(
+      page.locator('[data-component="composer-suggestions"] [data-suggestion-id][data-active]'),
+    ).toContainText("/redo")
+    await editor.press("Enter")
+
+    expect((await cleared).ok()).toBe(true)
+    expect(staged).toEqual([])
  })

  test("hides revert actions in a child session", async ({ page }) => {
@@ -23,23 +23,30 @@ for (const endpoint of ["/api/location", "/api/agent"]) {
      let requests = 0
      await page.route("**/api/**", (route) => {
        const url = new URL(route.request().url())
+
        if (url.pathname !== endpoint || url.searchParams.get("location[directory]") !== directory)
          return route.fallback()
        requests++
+
        if (recover && requests > 1) return route.fallback()
+
        return route.fulfill({ status: 500, body: "", headers: { "access-control-allow-origin": "*" } })
      })
+
      const failure = page.waitForResponse(
        (response) => new URL(response.url()).pathname === endpoint && response.status() === 500,
      )
+
      const settled = page.waitForResponse((response) => {
        const url = new URL(response.url())
+
        return (
          url.pathname === endpoint &&
          url.searchParams.get("location[directory]") === directory &&
          (recover ? response.ok() : requests === 3 && response.status() === 500)
        )
      })
+
      await page.goto(`/server/${base64Encode(fixture.serverKey)}/session/${sessionID}`)
      await failure
      await expect(page.getByText("Keep working in this worktree", { exact: true })).toBeVisible()
@@ -86,10 +93,12 @@ test("follows a live session move while the agent catalog is still loading", asy
  })
  await page.route("**/api/**", async (route) => {
    const url = new URL(route.request().url())
+
    if (url.pathname === "/api/agent" && url.searchParams.get("location[directory]") === directory) {
      requested.resolve()
      await release.promise
    }
+
    return route.fallback()
  })
  await page.goto(`/server/${base64Encode(fixture.serverKey)}/session/${sessionID}`)
@@ -99,10 +108,13 @@ test("follows a live session move while the agent catalog is still loading", asy
  await prompt.fill("Keep this draft")
  await expect(page.getByText("Session location unavailable", { exact: true })).toHaveCount(0)
  await transport.waitForConnection()
+
  const resolved = page.waitForResponse((response) => {
    const url = new URL(response.url())
+
    return url.pathname === "/api/agent" && url.searchParams.get("location[directory]") === destination && response.ok()
  })
+
  session.directory = destination
  await transport.send({
    id: "evt_location_moved_while_loading",
@@ -112,10 +124,13 @@ test("follows a live session move while the agent catalog is still loading", asy
    data: { sessionID, location: { directory: destination }, projectID: fixture.project.id },
  })
  await resolved
+
  const delayed = page.waitForResponse((response) => {
    const url = new URL(response.url())
+
    return url.pathname === "/api/agent" && url.searchParams.get("location[directory]") === directory && response.ok()
  })
+
  release.resolve()
  await delayed
  await expect(prompt).toBeEditable()
@@ -127,6 +142,76 @@ test("follows a live session move while the agent catalog is still loading", asy
  expect(recovery).toEqual([])
 })

+test("keeps the side panel's tabs and selection when the session moves", async ({ page }) => {
+  const directory = "/projects/tabs-before-move"
+  const destination = "/projects/tabs-after-move"
+  const sessionID = "ses_location_moved_tabs"
+  const session = { id: sessionID, projectID: fixture.project.id, directory, title: "Moved tabs" }
+  const transport = await installSseTransport(page, { server: fixture.serverKey })
+  await mockOpenCodeServer(page, {
+    directory: fixture.directory,
+    project: fixture.project,
+    provider: fixture.provider,
+    sessions: [session],
+    fileList: () => [],
+    findFiles: (input) => ["README.md", "NOTES.md"].filter((name) => name.startsWith(input.query)),
+    fileContent: (path) => ({ type: "text", content: `contents:${session.directory}:${path}` }),
+    pageMessages: () => ({
+      items: [{ id: "msg_saved", type: "user", text: "Keep my tabs", time: { created: 1 } }],
+    }),
+  })
+  await page.goto(`/server/${base64Encode(fixture.serverKey)}/session/${sessionID}`)
+  await expect(page.getByRole("textbox", { name: "Prompt", exact: true })).toBeEditable()
+
+  const panel = page.getByRole("complementary", { name: "Review and files" })
+  const files = panel.getByRole("tab", { name: /\.md$/ })
+  const notes = panel.getByRole("tab", { name: "NOTES.md", exact: true })
+
+  // A lost selection would fall back to the first file tab, README.md, so NOTES.md stays selected only if it carries.
+  for (const name of ["README", "NOTES"]) {
+    await page.keyboard.press("ControlOrMeta+Shift+P")
+
+    const dialog = page.getByRole("dialog")
+    const search = dialog.getByRole("textbox")
+    await search.fill(name)
+    await expect(dialog.getByRole("option", { name: `/ ${name}.md`, exact: true })).toHaveAttribute(
+      "aria-selected",
+      "true",
+    )
+    await search.press("Enter")
+    await expect(dialog).toHaveCount(0)
+    await expect(panel.getByRole("tab", { name: `${name}.md`, exact: true })).toHaveAttribute("aria-selected", "true")
+  }
+
+  await expect(files).toHaveText(["README.md", "NOTES.md"])
+  await expect(panel.getByText(`contents:${directory}:NOTES.md`, { exact: true })).toBeVisible()
+
+  await transport.waitForConnection()
+
+  const resolved = page.waitForResponse((response) => {
+    const url = new URL(response.url())
+
+    return (
+      url.pathname === "/api/location" && url.searchParams.get("location[directory]") === destination && response.ok()
+    )
+  })
+
+  session.directory = destination
+  await transport.send({
+    id: "evt_location_moved_tabs",
+    type: "session.moved",
+    created: 2,
+    durable: { aggregateID: sessionID, seq: 1, version: 1 },
+    data: { sessionID, location: { directory: destination }, projectID: fixture.project.id },
+  })
+  await resolved
+  await expect(page.locator('[data-type="location-switched"]').getByText(destination, { exact: true })).toBeVisible()
+  await expect(files).toHaveText(["README.md", "NOTES.md"])
+  await expect(notes).toHaveAttribute("aria-selected", "true")
+  // The carried tab shows the file in the new directory.
+  await expect(panel.getByText(`contents:${destination}:NOTES.md`, { exact: true })).toBeVisible()
+})
+
 test("refreshes a session moved during disconnection without losing the draft", async ({ page }) => {
  const recovery = recoveryRequests(page)
  const directory = "/projects/before-reconnect"
@@ -149,12 +234,15 @@ test("refreshes a session moved during disconnection without losing the draft",
  await expect(prompt).toBeEditable()
  await prompt.fill("Draft before disconnect")
  const connection = await transport.waitForConnection()
+
  const resolved = page.waitForResponse((response) => {
    const url = new URL(response.url())
+
    return (
      url.pathname === "/api/location" && url.searchParams.get("location[directory]") === destination && response.ok()
    )
  })
+
  session.directory = destination
  await transport.close()
  await transport.waitForConnection({ after: connection.id })
@@ -186,9 +274,11 @@ test("ignores an old failed location read after reconnecting", async ({ page })
  await page.route("**/api/location?**", async (route) => {
    if (new URL(route.request().url()).searchParams.get("location[directory]") !== directory) return route.fallback()
    requests++
+
    if (requests > 1) return route.fallback()
    requested.resolve()
    await release.promise
+
    return route.fulfill({
      status: 500,
      body: "",
@@ -202,12 +292,15 @@ test("ignores an old failed location read after reconnecting", async ({ page })
  await prompt.fill("Keep typing here")
  const connection = await transport.waitForConnection()
  const metadata = page.waitForResponse((response) => new URL(response.url()).pathname === `/api/session/${sessionID}`)
+
  const resolved = page.waitForResponse((response) => {
    const url = new URL(response.url())
+
    return (
      url.pathname === "/api/location" && url.searchParams.get("location[directory]") === directory && response.ok()
    )
  })
+
  await transport.close()
  await transport.waitForConnection({ after: connection.id })
  await metadata
@@ -227,7 +320,9 @@ function recoveryRequests(page: Page) {
  const requests: string[] = []
  page.on("request", (request) => {
    const path = new URL(request.url()).pathname
+
    if (request.method() === "POST" && /^\/api\/(session\/[^/]+\/move|worktree)$/.test(path)) requests.push(path)
  })
+
  return requests
 }
@@ -1,10 +1,26 @@
 import { expect, test, type Page } from "@playwright/test"
 import type { OpenCodeEvent, SessionInboxInfo, SessionMessageInfo } from "@opencode/client/promise"
+import { PromptInput } from "@opencode/schema/prompt-input"
+import { SessionInbox } from "@opencode/schema/session-inbox"
+import { SessionMessage } from "@opencode/schema/session-message"
+import { Schema } from "effect"
 import { provider } from "../utils/app"
+import type { MockServerConfig } from "../utils/mock-server"
 import { openSession } from "../utils/workspace"

 const sessionID = "ses_session_queue_regression"

+// The session.prompt payload, as the server's endpoint validates it.
+const PromptBody = Schema.Struct({
+  id: SessionMessage.ID.pipe(Schema.optional),
+  ...PromptInput.Prompt.fields,
+  metadata: SessionInbox.UserPayload.fields.metadata,
+  delivery: SessionInbox.Delivery.pipe(Schema.optional),
+  resume: Schema.Boolean.pipe(Schema.optional),
+})
+
+const decodePromptBody = Schema.decodeUnknownSync(PromptBody)
+
 type InboxRow = {
  id: string
  sessionID: string
@@ -12,11 +28,26 @@ type InboxRow = {
  type: "user"
  payload: {
    text: string
-    metadata?: Record<string, unknown>
+    metadata?: typeof PromptBody.Type.metadata
    files?: Extract<SessionInboxInfo, { type: "user" }>["payload"]["files"]
    agents?: Extract<SessionInboxInfo, { type: "user" }>["payload"]["agents"]
  }
-  delivery: "steer" | "queue"
+  delivery: SessionInbox.Delivery
+}
+
+function storedFile(file: NonNullable<typeof PromptBody.Type.files>[number]) {
+  const inline = file.uri.startsWith("data:")
+
+  const stored: NonNullable<InboxRow["payload"]["files"]>[number] = {
+    data: inline ? file.uri.slice(file.uri.indexOf(",") + 1) : "",
+    mime: inline ? file.uri.slice("data:".length, file.uri.indexOf(";")) : "text/plain",
+    source: inline ? { type: "inline" } : { type: "uri", uri: file.uri },
+    name: file.name,
+    description: file.description,
+    mention: file.mention,
+  }
+
+  return stored
 }

 function createQueueMock(seed: string[], messages: SessionMessageInfo[] = []) {
@@ -28,16 +59,20 @@ function createQueueMock(seed: string[], messages: SessionMessageInfo[] = []) {
    payload: { text },
    delivery: "queue",
  }))
+
  const events: OpenCodeEvent[] = []
-  const prompts: Record<string, unknown>[] = []
+  const prompts: (typeof PromptBody.Type)[] = []
+  const compactions: SessionInboxInfo[] = []
  const changes: { inboxID: string; action: "cancel" | "steer" | "queue" }[] = []
  const log: string[] = []
  let sequence = 0
+
  const emit = <Type extends OpenCodeEvent["type"]>(
    type: Type,
    data: Extract<OpenCodeEvent, { type: Type }>["data"],
  ) => {
    sequence += 1
+    // SAFETY: `type` selects `data` from the same OpenCodeEvent member, so the pair is that member.
    events.push({
      id: `evt_queue_${sequence}`,
      type,
@@ -46,28 +81,37 @@ function createQueueMock(seed: string[], messages: SessionMessageInfo[] = []) {
      data,
    } as OpenCodeEvent)
  }
+
  return {
    rows,
+    compactions,
    prompts,
    changes,
    log,
    messages,
    emit,
    events: () => events.splice(0),
-    onPrompt: (input: { sessionID: string; body: Record<string, unknown> }) => {
-      prompts.push(input.body)
-      log.push(`prompt:${String(input.body.delivery ?? "steer")}`)
+    onPrompt: (input: Parameters<NonNullable<MockServerConfig["onPrompt"]>>[0]) => {
+      const body = decodePromptBody(input.body)
+      prompts.push(body)
+      log.push(`prompt:${body.delivery ?? "steer"}`)
+
      const row: InboxRow = {
-        id: typeof input.body.id === "string" ? input.body.id : `inb_mock_${sequence}`,
+        id: body.id ?? `inb_mock_${sequence}`,
        sessionID: input.sessionID,
        time: { created: Date.now() },
        type: "user",
-        payload: {
-          text: typeof input.body.text === "string" ? input.body.text : "",
-          ...(input.body.metadata === undefined ? {} : { metadata: input.body.metadata as Record<string, unknown> }),
-        },
-        delivery: input.body.delivery === "queue" ? "queue" : "steer",
+        payload: { text: body.text },
+        delivery: body.delivery ?? "steer",
      }
+
+      if (body.metadata !== undefined) row.payload.metadata = body.metadata
+
+      // Store attachments the way the server materializes them, so re-admissions round-trip.
+      if (body.files !== undefined) row.payload.files = body.files.map(storedFile)
+
+      if (body.agents !== undefined)
+        row.payload.agents = body.agents.map((agent) => ({ name: agent.name, mention: agent.mention }))
      rows.push(row)
      emit("session.inbox.enqueued", {
        sessionID: input.sessionID,
@@ -75,17 +119,32 @@ function createQueueMock(seed: string[], messages: SessionMessageInfo[] = []) {
        item: { type: "user", payload: row.payload, delivery: row.delivery },
      })
    },
+    onCompact: (input: Parameters<NonNullable<MockServerConfig["onCompact"]>>[0]) => {
+      log.push("compact")
+      compactions.push({
+        id: Schema.decodeUnknownSync(SessionMessage.ID)(input.body.id),
+        sessionID: input.sessionID,
+        time: { created: Date.now() },
+        type: "compaction",
+        payload: {},
+        delivery: "steer",
+      })
+    },
    onInboxChange: (input: { sessionID: string; inboxID: string; action: "cancel" | "steer" | "queue" }) => {
      changes.push({ inboxID: input.inboxID, action: input.action })
      log.push(`${input.action}:${input.inboxID}`)
      const index = rows.findIndex((row) => row.id === input.inboxID)
      const row = rows[index]
+
      if (!row) return
+
      if (input.action === "cancel") {
        rows.splice(index, 1)
        emit("session.inbox.cancelled", { sessionID: input.sessionID, inboxID: input.inboxID })
+
        return
      }
+
      row.delivery = input.action
      emit("session.inbox.delivery.changed", {
        sessionID: input.sessionID,
@@ -96,21 +155,38 @@ function createQueueMock(seed: string[], messages: SessionMessageInfo[] = []) {
  }
 }

-async function openQueue(page: Page, mock: ReturnType<typeof createQueueMock>, followUpBehavior?: "queue" | "steer") {
+async function openQueue(
+  page: Page,
+  mock: ReturnType<typeof createQueueMock>,
+  followUpBehavior?: "queue" | "steer",
+  revert?: string,
+) {
  const model = { id: "queue-model", name: "Queue Model" }
-  await openSession(page, {
+
+  const options: Parameters<typeof openSession>[1] = {
    name: "SessionQueueRegression",
-    sessions: [{ id: sessionID, title: "Session queue regression", model: { id: model.id, providerID: "opencode" } }],
+    sessions: [
+      {
+        id: sessionID,
+        title: "Session queue regression",
+        model: { id: model.id, providerID: "opencode" },
+        revert: revert ? { messageID: revert } : undefined,
+      },
+    ],
    provider: provider(model),
    pageMessages: () => ({ items: mock.messages }),
    sessionStatus: () => ({ [sessionID]: { type: "running" } }),
-    inbox: () => mock.rows.map((row) => ({ ...row, payload: { ...row.payload } })),
+    inbox: () => [...mock.rows.map((row) => ({ ...row, payload: { ...row.payload } })), ...mock.compactions],
    onPrompt: mock.onPrompt,
+    onCompact: mock.onCompact,
    onInboxChange: mock.onInboxChange,
    events: mock.events,
-    ...(followUpBehavior ? { seed: { settings: { general: { followUpBehavior } } } } : {}),
-  })
+  }
+
+  if (followUpBehavior) options.seed = { settings: { general: { followUpBehavior } } }
+  await openSession(page, options)
  const composer = page.locator('[data-component="composer"]')
+
  return {
    composer,
    input: composer.locator('[data-component="composer-editor"]'),
@@ -118,6 +194,20 @@ async function openQueue(page: Page, mock: ReturnType<typeof createQueueMock>, f
  }
 }

+async function runSlash(page: Page, input: Awaited<ReturnType<typeof openQueue>>["input"], name: string) {
+  await input.pressSequentially(`/${name}`)
+  await expect(page.locator('[data-component="composer-suggestions"] [data-suggestion-id][data-active]')).toContainText(
+    `/${name}`,
+  )
+  await input.press("Enter")
+}
+
+function userRow(page: Page, messageID: string) {
+  return page.locator(
+    `[data-timeline-virtual-content] [data-timeline-row="UserMessage"][data-message-id="${messageID}"]`,
+  )
+}
+
 test("follow-up preference controls Enter while Mod+Enter uses the alternate delivery", async ({ page }) => {
  const mock = createQueueMock([])
  const view = await openQueue(page, mock, "queue")
@@ -135,6 +225,9 @@ test("follow-up preference controls Enter while Mod+Enter uses the alternate del

 test("dragging reorders queued prompts", async ({ page }) => {
  const mock = createQueueMock(["first queued prompt", "second queued prompt", "third queued prompt"])
+  mock.rows[0].payload.files = [
+    { data: "aGk=", mime: "text/plain", source: { type: "uri", uri: "file:///repo/main.ts" }, name: "main.ts" },
+  ]
  const view = await openQueue(page, mock)
  await expect(view.rows).toHaveCount(3)

@@ -143,6 +236,7 @@ test("dragging reorders queued prompts", async ({ page }) => {
  await first.getByRole("button", { name: "Reorder queued prompt" }).hover()
  await page.mouse.down()
  const target = await third.boundingBox()
+
  if (!target) throw new Error("The target queue row is not visible")
  await page.mouse.move(target.x + target.width / 2, target.y + target.height / 2, { steps: 10 })
  await page.mouse.up()
@@ -157,6 +251,8 @@ test("dragging reorders queued prompts", async ({ page }) => {
    "third queued prompt",
    "first queued prompt",
  ])
+  // A re-admitted file keeps the URI it came from instead of becoming an inline snapshot.
+  expect(mock.prompts[2].files).toMatchObject([{ uri: "file:///repo/main.ts", name: "main.ts" }])
  expect(mock.changes).toEqual([
    { inboxID: "inb_seed_1", action: "cancel" },
    { inboxID: "inb_seed_2", action: "cancel" },
@@ -164,6 +260,56 @@ test("dragging reorders queued prompts", async ({ page }) => {
  ])
 })

+for (const change of ["reorder", "edit"] as const) {
+  test(`a ${change} that cannot re-admit a prompt leaves the queue unchanged`, async ({ page }) => {
+    const order = ["first queued prompt", "second queued prompt", "third queued prompt"]
+    const mock = createQueueMock(order)
+    const admit = mock.onPrompt
+    // The last prompt's re-admission fails after the server admitted it, so its response is lost.
+    mock.onPrompt = (input) => {
+      admit(input)
+
+      if (input.body.text === order[2]) throw new Error("Connection lost after admission")
+    }
+
+    const view = await openQueue(page, mock)
+    await expect(view.rows).toHaveCount(3)
+
+    if (change === "reorder") {
+      const first = view.rows.filter({ hasText: order[0] })
+      const second = view.rows.filter({ hasText: order[1] })
+      await first.getByRole("button", { name: "Reorder queued prompt" }).hover()
+      await page.mouse.down()
+      const target = await second.boundingBox()
+
+      if (!target) throw new Error("The target queue row is not visible")
+      await page.mouse.move(target.x + target.width / 2, target.y + target.height / 2, { steps: 10 })
+      await page.mouse.up()
+    }
+
+    if (change === "edit") {
+      await view.rows.getByText(order[1], { exact: true }).click()
+      await expect(view.input).toHaveText(order[1])
+      await expect(view.input).toBeFocused()
+      await view.input.press("End")
+      await view.input.pressSequentially(", edited")
+      await view.input.press("Enter")
+    }
+
+    // The replacements admitted before the failure are withdrawn; the originals stay in place.
+    await expect.poll(() => mock.log.includes(`cancel:${mock.prompts.at(-1)?.id}`)).toBe(true)
+    await expect.poll(() => mock.changes.length).toBe(mock.prompts.length)
+    expect(mock.changes.every((entry) => entry.action === "cancel" && !entry.inboxID.startsWith("inb_seed_"))).toBe(
+      true,
+    )
+    await expect(view.rows.locator('[data-action="session-queue-edit"]')).toHaveText(order)
+    expect(mock.rows.map((row) => row.payload.text)).toEqual(order)
+
+    // A failed edit keeps its draft in the composer so nothing typed is lost.
+    if (change === "edit") await expect(view.input).toHaveText("second queued prompt, edited")
+  })
+}
+
 test("editing restores the existing draft and replaces only the original queue position", async ({ page }) => {
  const mock = createQueueMock(["first queued prompt", "tighten the error copy", "third queued prompt"])
  const view = await openQueue(page, mock)
@@ -180,7 +326,9 @@ test("editing restores the existing draft and replaces only the original queue p
  await original.click()
  await expect(view.input).toHaveText("tighten the error copy")
  await expect(view.input).toBeFocused()
-  await view.input.fill("tighten the error copy and add a retry hint")
+  // fill() on a composer that holds text can append, so extend the loaded text instead.
+  await view.input.press("End")
+  await view.input.pressSequentially(" and add a retry hint")
  await expect(view.input).toHaveText("tighten the error copy and add a retry hint")
  await view.input.press("Enter")

@@ -190,16 +338,123 @@ test("editing restores the existing draft and replaces only the original queue p
    "third queued prompt",
  ])
  await expect(view.input).toHaveText("my in-progress draft")
+  // One rewrite from the edited position: the replacement, then the prompts after it.
  expect(mock.prompts.map((prompt) => prompt.text)).toEqual([
-    "tighten the error copy and add a retry hint",
    "tighten the error copy and add a retry hint",
    "third queued prompt",
  ])
  expect(mock.prompts.every((prompt) => prompt.delivery === "queue" && prompt.resume === false)).toBe(true)
-  expect(mock.changes.map((change) => change.action)).toEqual(["cancel", "cancel", "cancel"])
+  expect(mock.changes).toEqual([
+    { inboxID: "inb_seed_2", action: "cancel" },
+    { inboxID: "inb_seed_3", action: "cancel" },
+  ])
  expect(mock.log[0]).toBe("prompt:queue")
 })

+for (const delivery of ["queue", "steer"] as const) {
+  test(`editing a prompt the server delivered meanwhile keeps the edit draft (${delivery})`, async ({ page }) => {
+    const mock = createQueueMock(["first queued prompt", "second queued prompt"])
+    const view = await openQueue(page, mock, "queue")
+    await view.rows.getByText("second queued prompt", { exact: true }).click()
+    await expect(view.input).toHaveText("second queued prompt")
+    await expect(view.input).toBeFocused()
+    await view.input.press("End")
+    await view.input.pressSequentially(", edited")
+    // The server delivers the original before the edit lands; this client has not heard yet.
+    mock.rows.splice(1, 1)
+    await view.input.press(delivery === "queue" ? "Enter" : "ControlOrMeta+Enter")
+
+    await expect(page.getByText("Request failed")).toBeVisible()
+    await expect(view.input).toHaveText("second queued prompt, edited")
+    expect(mock.prompts).toEqual([])
+    expect(mock.changes).toEqual([])
+  })
+}
+
+for (const change of ["reorder", "edit"] as const) {
+  test(`a staged revert refuses a queue ${change}, whose admission would commit it`, async ({ page }) => {
+    const order = ["first queued prompt", "second queued prompt"]
+
+    const mock = createQueueMock(order, [
+      { id: "msg_queue_delivered", type: "user", text: "First prompt", time: { created: 1 } },
+    ])
+
+    const view = await openQueue(page, mock, undefined, "msg_queue_delivered")
+    await expect(view.rows).toHaveCount(2)
+
+    if (change === "reorder") {
+      await view.rows.filter({ hasText: order[0] }).getByRole("button", { name: "Reorder queued prompt" }).hover()
+      await page.mouse.down()
+      const target = await view.rows.filter({ hasText: order[1] }).boundingBox()
+
+      if (!target) throw new Error("The target queue row is not visible")
+      await page.mouse.move(target.x + target.width / 2, target.y + target.height / 2, { steps: 10 })
+      await page.mouse.up()
+    }
+
+    if (change === "edit") await view.rows.getByText(order[1], { exact: true }).click()
+
+    await expect(page.getByText("Redo the revert before you reorder or edit queued prompts")).toBeVisible()
+    await expect(view.rows.locator('[data-action="session-queue-edit"]')).toHaveText(order)
+    await expect(view.input).toHaveText("")
+    expect(mock.prompts).toEqual([])
+    expect(mock.changes).toEqual([])
+  })
+}
+
+test("editing drops a file whose mention was deleted and keeps unmentioned context", async ({ page }) => {
+  const mock = createQueueMock(["inspect @main.ts here"])
+  mock.rows[0].payload.files = [
+    {
+      data: "aGk=",
+      mime: "text/plain",
+      source: { type: "uri", uri: "file:///repo/main.ts" },
+      name: "main.ts",
+      mention: { start: 8, end: 16, text: "@main.ts" },
+    },
+    { data: "bm90ZXM=", mime: "text/plain", source: { type: "uri", uri: "file:///repo/notes.md" }, name: "notes.md" },
+  ]
+  const view = await openQueue(page, mock)
+  await view.rows.getByText("inspect @main.ts here", { exact: true }).click()
+  await expect(view.input).toHaveText("inspect @main.ts here")
+  // The edit focuses the composer a frame after loading it; keys sent earlier miss it.
+  await expect(view.input).toBeFocused()
+  await view.input.press("ControlOrMeta+a")
+  await view.input.pressSequentially("inspect here")
+  await view.input.press("Enter")
+
+  await expect.poll(() => mock.prompts.length).toBe(1)
+  expect(mock.prompts[0].files?.map((file) => file.uri)).toEqual(["file:///repo/notes.md"])
+})
+
+test("editing a comment-only prompt keeps its notes once", async ({ page }) => {
+  const note = "The user made the following comment regarding line 2 of /repo/app.ts: check the guard"
+  const mock = createQueueMock([note])
+  mock.rows[0].payload.metadata = {
+    displayText: "",
+    comments: [
+      {
+        path: "/repo/app.ts",
+        comment: "check the guard",
+        selection: { startLine: 2, startChar: 0, endLine: 2, endChar: 0 },
+        origin: "review",
+      },
+    ],
+  }
+  const view = await openQueue(page, mock)
+  // With no display text, the editor shows the note itself, so the edit owns it as text.
+  await view.rows.getByText(note, { exact: true }).click()
+  await expect(view.input).toHaveText(note)
+  await view.input.press("End")
+  await view.input.pressSequentially(", please")
+  await expect(view.input).toHaveText(`${note}, please`)
+  await view.input.press("Enter")
+
+  await expect.poll(() => mock.prompts.length).toBe(1)
+  expect(mock.prompts[0].text).toBe(`${note}, please`)
+  expect(mock.prompts[0].metadata).toMatchObject({ displayText: `${note}, please`, comments: [] })
+})
+
 test("Undo cancels only the selected queued prompt and focuses the restored input", async ({ page }) => {
  await page.setViewportSize({ width: 390, height: 844 })
  const text = "Review the detailed error report and check every step of the retry path ".repeat(4)
@@ -241,6 +496,47 @@ test("Undo appends to an existing draft and restores inline attachments", async
  expect(mock.changes).toEqual([{ inboxID: "inb_seed_1", action: "cancel" }])
 })

+test("Undo of a comment-only prompt keeps the draft text and restores the comment once", async ({ page }) => {
+  const comment = "check the guard"
+  const mock = createQueueMock([`The user made the following comment regarding line 2 of /repo/app.ts: ${comment}`])
+  mock.rows[0].payload.metadata = {
+    displayText: "",
+    comments: [
+      {
+        path: "/repo/app.ts",
+        comment,
+        selection: { startLine: 2, startChar: 0, endLine: 2, endChar: 0 },
+        origin: "review",
+      },
+    ],
+  }
+  mock.rows[0].payload.files = [
+    {
+      data: "aGk=",
+      mime: "text/plain",
+      source: { type: "uri", uri: "file:///repo/app.ts?start=2&end=2" },
+      name: "app.ts",
+    },
+  ]
+  const view = await openQueue(page, mock)
+  await view.input.fill("my draft")
+  await view.rows.getByRole("button", { name: "Undo" }).click()
+
+  await expect(view.rows).toHaveCount(0)
+  await expect(view.input).toHaveText("my draft")
+  const cards = view.composer.locator('[data-component="composer-attachments"] [data-component="attachment-card"]')
+  await expect(cards).toHaveCount(1)
+  await expect(cards).toContainText(comment)
+
+  // The resubmission carries the draft text with no stray break and the comment's file exactly once.
+  await view.input.press("Enter")
+  await expect.poll(() => mock.prompts.length).toBe(1)
+  expect(mock.prompts[0].text).toBe(
+    `my draft\nThe user made the following comment regarding line 2 of /repo/app.ts: ${comment}`,
+  )
+  expect(mock.prompts[0].files?.map((file) => file.uri)).toEqual(["file:///repo/app.ts?start=2&end=2"])
+})
+
 test("Undo preserves mentioned file and agent references on resubmission", async ({ page }) => {
  const mock = createQueueMock(["inspect @main.ts with @build"])
  mock.rows[0].payload.files = [
@@ -258,23 +554,256 @@ test("Undo preserves mentioned file and agent references on resubmission", async
  await expect(view.input).toHaveText("inspect @main.ts with @build")
  await view.input.press("Enter")
  await expect.poll(() => mock.prompts.length).toBe(1)
+  // Like the TUI, a restored mention points at the file it named rather than a snapshot of it.
  expect(mock.prompts[0].files).toMatchObject([
-    { uri: "data:text/plain;base64,aGk=", mention: { text: "@main.ts", start: 8, end: 16 } },
+    { uri: "file:///repo/main.ts", mention: { text: "@main.ts", start: 8, end: 16 } },
  ])
  expect(mock.prompts[0].agents).toMatchObject([{ name: "build", mention: { text: "@build" } }])
 })

-test("Undo does not discard hidden file context", async ({ page }) => {
-  const mock = createQueueMock(["inspect this file"])
-  mock.rows[0].payload.files = [
-    { data: "aGk=", mime: "text/plain", source: { type: "uri", uri: "file:///repo/main.ts" }, name: "main.ts" },
+for (const delivery of ["queue", "steer"] as const) {
+  test(`${delivery === "queue" ? "Undo" : "/undo of a pending steer"} keeps unmentioned file context`, async ({
+    page,
+  }) => {
+    // Another client (for example ACP) can attach a file without mentioning it.
+    const mock = createQueueMock(["inspect this file"])
+    const inboxID = mock.rows[0].id
+    mock.rows[0].delivery = delivery
+    mock.rows[0].payload.files = [
+      {
+        data: "aGk=",
+        mime: "text/plain",
+        source: { type: "uri", uri: "file:///repo/main.ts" },
+        name: "main.ts",
+        description: "the failing version",
+      },
+    ]
+    const view = await openQueue(page, mock)
+
+    if (delivery === "queue") await view.rows.getByRole("button", { name: "Undo" }).click()
+
+    if (delivery === "steer") {
+      await expect(userRow(page, inboxID)).toContainText("inspect this file")
+      await runSlash(page, view.input, "undo")
+    }
+
+    // Like the TUI, the file returns attached without a mention, as a chip rather than prompt text.
+    const chip = view.composer.locator('[data-slot="composer-context-file"]')
+
+    await expect(view.input).toHaveText("inspect this file")
+    await expect(chip).toHaveCount(1)
+    await expect(chip).toContainText("main.ts")
+    expect(mock.changes).toEqual([{ inboxID, action: "cancel" }])
+
+    // Like the TUI's blank Enter, a chip alone sends nothing: without text the draft reads as blank.
+    await expect(view.input).toBeFocused()
+    await view.input.press("ControlOrMeta+a")
+    await view.input.press("Backspace")
+    await expect(view.input).toHaveText("")
+    await expect(view.composer.locator('[data-action="composer-submit"]')).toHaveAttribute("aria-label", "Stop")
+    await expect(chip).toHaveCount(1)
+
+    await view.input.pressSequentially("inspect this file")
+    await view.input.press("Enter")
+    await expect.poll(() => mock.prompts.length).toBe(1)
+    expect(mock.prompts[0].files).toMatchObject([
+      { uri: "file:///repo/main.ts", name: "main.ts", description: "the failing version" },
+    ])
+    expect(mock.prompts[0].files?.[0]?.mention).toBeUndefined()
+    await expect(chip).toHaveCount(0)
+  })
+}
+
+test("reverting to another prompt replaces the file chips of an earlier restore", async ({ page }) => {
+  const mock = createQueueMock(
+    [],
+    [
+      { id: "msg_queue_first", type: "user", text: "First prompt", time: { created: 1 } },
+      {
+        id: "msg_queue_second",
+        type: "user",
+        text: "Second prompt",
+        files: [
+          { data: "aGk=", mime: "text/plain", source: { type: "uri", uri: "file:///repo/main.ts" }, name: "main.ts" },
+        ],
+        time: { created: 2 },
+      },
+    ],
+  )
+
+  const view = await openQueue(page, mock)
+  const chip = view.composer.locator('[data-slot="composer-context-file"]')
+
+  for (const [id, text, chips] of [
+    ["msg_queue_second", "Second prompt", 1],
+    ["msg_queue_first", "First prompt", 0],
+  ] as const) {
+    const row = userRow(page, id)
+
+    await row.hover()
+    await row.getByRole("button", { name: "Revert message" }).click()
+    await expect(view.input).toHaveText(text)
+    await expect(chip).toHaveCount(chips)
+  }
+})
+
+test("/undo withdraws a pending steer without interrupting the running session", async ({ page }) => {
+  const mock = createQueueMock([])
+  const view = await openQueue(page, mock, "steer")
+  const stops: string[] = []
+  page.on("request", (request) => {
+    const path = new URL(request.url()).pathname
+
+    if (path.endsWith("/interrupt") || path.endsWith("/wait") || path.endsWith("/revert/stage")) stops.push(path)
+  })
+  const text = "U2: Also check the retry path."
+  await view.input.fill(text)
+  await view.input.press("Enter")
+  await expect.poll(() => mock.rows.map((row) => row.delivery)).toEqual(["steer"])
+  await expect(view.input).toHaveText("")
+
+  const inboxID = mock.rows[0].id
+  const pending = userRow(page, inboxID)
+
+  await expect(pending).toContainText(text)
+  await runSlash(page, view.input, "undo")
+
+  await expect(pending).toHaveCount(0)
+  await expect(view.input).toHaveText(text)
+  expect(mock.changes).toEqual([{ inboxID, action: "cancel" }])
+  expect(stops).toEqual([])
+})
+
+test("reverting a delivered prompt leaves queued prompts alone, as in the TUI", async ({ page }) => {
+  const mock = createQueueMock(
+    ["U2: queued follow-up"],
+    [{ id: "msg_queue_delivered", type: "user", text: "First prompt", time: { created: 1 } }],
+  )
+
+  const view = await openQueue(page, mock)
+  const delivered = userRow(page, "msg_queue_delivered")
+
+  const staged = page.waitForResponse(
+    (response) => new URL(response.url()).pathname === `/api/session/${sessionID}/revert/stage`,
+  )
+
+  await delivered.hover()
+  await delivered.getByRole("button", { name: "Revert message" }).click()
+  expect((await staged).ok()).toBe(true)
+
+  await expect(view.input).toHaveText("First prompt")
+  expect(mock.changes).toEqual([])
+  await expect(view.rows).toHaveCount(1)
+})
+
+test("a shell command cannot wait in the queue, as in the TUI", async ({ page }) => {
+  const mock = createQueueMock([])
+  const view = await openQueue(page, mock, "queue")
+  const shells: string[] = []
+  page.on("request", (request) => {
+    if (new URL(request.url()).pathname.endsWith(`/${sessionID}/shell`)) shells.push(request.url())
+  })
+
+  await view.input.pressSequentially("!")
+  await view.input.pressSequentially("git status")
+  await view.input.press("Enter")
+
+  await expect(page.getByText("This prompt cannot be queued")).toBeVisible()
+  await expect(view.input).toHaveText("git status")
+  expect(shells).toEqual([])
+  expect(mock.prompts).toEqual([])
+})
+
+test("/compact runs with the composer model and shows a queued compaction, as in the TUI", async ({ page }) => {
+  const mock = createQueueMock(
+    [],
+    [{ id: "msg_queue_delivered", type: "user", text: "First prompt", time: { created: 1 } }],
+  )
+
+  const view = await openQueue(page, mock)
+  const models: unknown[] = []
+  page.on("request", (request) => {
+    if (new URL(request.url()).pathname !== `/api/session/${sessionID}/model`) return
+    mock.log.push("model")
+    models.push(request.postDataJSON())
+  })
+
+  await expect(userRow(page, "msg_queue_delivered")).toContainText("First prompt")
+  await runSlash(page, view.input, "compact")
+
+  await expect(page.locator('[data-timeline-row="CompactionQueued"]')).toHaveText("Session compaction queued")
+  // The row is optimistic; the model switch still precedes the admission.
+  await expect.poll(() => mock.log).toEqual(["model", "compact"])
+  expect(models).toMatchObject([{ model: { id: "queue-model", providerID: "opencode" } }])
+})
+
+for (const action of ["Move to queue", "Delete"] as const) {
+  test(`${action} on a pending steer replaces Revert, as in the TUI`, async ({ page }) => {
+    const mock = createQueueMock(["U2: Also check the retry path."])
+    const inboxID = mock.rows[0].id
+    mock.rows[0].delivery = "steer"
+    const view = await openQueue(page, mock)
+    const pending = userRow(page, inboxID)
+
+    await expect(pending).toContainText("U2: Also check the retry path.")
+    await pending.hover()
+    await expect(pending.getByRole("button", { name: "Revert message" })).toHaveCount(0)
+    await pending.getByRole("button", { name: action }).click()
+
+    await expect(pending).toHaveCount(0)
+    expect(mock.changes).toEqual([{ inboxID, action: action === "Delete" ? "cancel" : "queue" }])
+    // Neither action returns the prompt to the composer; a moved steer waits in the queue.
+    await expect(view.input).toHaveText("")
+    await expect(view.rows).toHaveCount(action === "Delete" ? 0 : 1)
+
+    if (action === "Move to queue") await expect(view.rows).toContainText("U2: Also check the retry path.")
+  })
+}
+
+test("/undo returns a pending steer's review comment to the composer", async ({ page }) => {
+  const display = "tighten this"
+  const comment = "check the guard"
+
+  const mock = createQueueMock([
+    `${display}\nThe user made the following comment regarding line 2 of /repo/app.ts: ${comment}`,
+  ])
+
+  const row = mock.rows[0]
+  row.delivery = "steer"
+  row.payload.metadata = {
+    displayText: display,
+    comments: [
+      {
+        path: "/repo/app.ts",
+        comment,
+        selection: { startLine: 2, startChar: 0, endLine: 2, endChar: 0 },
+        origin: "review",
+      },
+    ],
+  }
+  // The comment's context file, which a resubmission regenerates from the restored comment.
+  row.payload.files = [
+    {
+      data: "aGk=",
+      mime: "text/plain",
+      source: { type: "uri", uri: "file:///repo/app.ts?start=2&end=2" },
+      name: "app.ts",
+    },
  ]
  const view = await openQueue(page, mock)
-  await view.rows.getByRole("button", { name: "Undo" }).click()
-  await expect(page.getByText("Edit this prompt in the queue to preserve its file context")).toBeVisible()
-  await expect(view.rows).toHaveCount(1)
-  await expect(view.input).toHaveText("")
-  expect(mock.changes).toEqual([])
+
+  const pending = userRow(page, row.id)
+
+  await expect(pending).toContainText(display)
+  await runSlash(page, view.input, "undo")
+
+  await expect(pending).toHaveCount(0)
+  await expect(view.input).toHaveText(display)
+  // The comment card is the only card: its context file is regenerated from it, not restored twice.
+  const cards = view.composer.locator('[data-component="composer-attachments"] [data-component="attachment-card"]')
+  await expect(cards).toHaveCount(1)
+  await expect(cards).toContainText(comment)
+  expect(mock.changes).toEqual([{ inboxID: row.id, action: "cancel" }])
 })

 for (const delivery of ["steer", "queue"] as const) {
@@ -285,6 +814,7 @@ for (const delivery of ["steer", "queue"] as const) {
    const userID = "msg_queue_initial_user"
    const assistantID = "msg_queue_continued_assistant"
    const followUp = "U2: Also check the retry path."
+
    const mock = createQueueMock(
      [],
      [
@@ -300,6 +830,7 @@ for (const delivery of ["steer", "queue"] as const) {
        },
      ],
    )
+
    const view = await openQueue(page, mock, delivery)
    const transcript = page.locator("[data-timeline-virtual-content]")
    const thinking = transcript.locator('[data-timeline-row="Thinking"]')
@@ -313,6 +844,7 @@ for (const delivery of ["steer", "queue"] as const) {

    const inboxID = mock.rows[0].id
    const pending = transcript.locator(`[data-timeline-row="UserMessage"][data-message-id="${inboxID}"]`)
+
    if (delivery === "queue") {
      const queued = view.rows.filter({ hasText: followUp })
      await expect(queued).toBeVisible()
@@ -322,6 +854,7 @@ for (const delivery of ["steer", "queue"] as const) {
      await queued.getByRole("button", { name: "Steer", exact: true }).click()
      await expect.poll(() => mock.changes).toEqual([{ inboxID, action: "steer" }])
    }
+
    await expect(view.rows).toHaveCount(0)
    await expect(pending).toContainText(followUp)
    await expect(thinking).toHaveCount(0)
@@ -334,6 +867,7 @@ for (const delivery of ["steer", "queue"] as const) {
      model,
      started: Date.now(),
    })
+
    for (const tool of [
      { id: "tool_queue_read", name: "read", input: { path: "src/queue.ts" } },
      { id: "tool_queue_grep", name: "grep", input: { pattern: "retry", path: "src" } },
@@ -348,6 +882,7 @@ for (const delivery of ["steer", "queue"] as const) {
        executed: true,
      })
    }
+
    mock.emit("session.step.ended", {
      sessionID,
      assistantMessageID: assistantID,
@@ -377,6 +912,7 @@ for (const delivery of ["steer", "queue"] as const) {
    await expect
      .poll(async () => {
        const boxes = await Promise.all([tools.boundingBox(), pending.boundingBox()])
+
        return boxes.every((box) => box !== null) && boxes[0]!.y + boxes[0]!.height <= boxes[1]!.y
      })
      .toBe(true)
@@ -395,9 +931,11 @@ for (const delivery of ["steer", "queue"] as const) {
    mock.emit("session.step.started", { ...later, agent: "build", model, started: Date.now() })
    mock.emit("session.text.started", { ...later, ordinal: 0 })
    mock.emit("session.text.ended", { ...later, ordinal: 0, text: "A3: Now checking the retry path for U2." })
+
    const response = transcript
      .locator('[data-timeline-row="AssistantPart"]')
      .filter({ hasText: "A3: Now checking the retry path for U2." })
+
    await expect(response).toHaveAttribute("data-message-id", inboxID)
    await expect(thinking).toHaveCount(0)
    await expect(tools.or(pending).or(response)).toHaveText([
@@ -134,6 +134,27 @@ test("a session in a worktree subfolder names its worktree and lists cached work
  list.release()
 })

+test("a subagent shows its details but cannot move to another worktree", async ({ page }) => {
+  const root = "C:/OpenCode/SmokeWorktrees"
+
+  await mockStressTimeline(page, {
+    sessions: fixture.sessions.map((item) =>
+      item.id === fixture.targetID
+        ? { ...item, parentID: fixture.sourceID, directory: `${root}/feature` }
+        : { ...item },
+    ),
+    worktrees: [{ directory: fixture.directory }, { directory: `${root}/feature`, strategy: "git" }],
+  })
+  await page.goto(sessionHref(fixture.targetID))
+
+  const summary = page.getByRole("dialog", { name: "Session details", exact: true })
+
+  await page.getByRole("button", { name: "Session details", exact: true }).click()
+  await expect(summary.getByText("feature", { exact: true })).toBeVisible()
+  await expect(summary.getByRole("button", { name: "feature", exact: true })).toHaveCount(0)
+  await expect(summary.getByRole("button", { name: "Extensions", exact: true })).toBeVisible()
+})
+
 test("the details follow the routed session when it moves to another worktree", async ({ page }) => {
  const root = "C:/OpenCode/SmokeWorktrees"

@@ -1,5 +1,5 @@
 import { expect, test, type Page } from "@playwright/test"
-import type { SessionMessageInfo } from "@opencode/client/promise"
+import type { OpenCodeEvent, SessionMessageInfo } from "@opencode/client/promise"
 import {
  NO_PROVIDER,
  REMOTE_SERVER,
@@ -240,7 +240,111 @@ test("a remote tab stays busy while a child session runs", async ({ page }) => {
  await expect(tabA.locator('[data-component="session-progress-indicator-v2"]')).toHaveCount(0)
 })

-test("inactive tabs load attention, but read transcript and inbox only on selection", async ({ page }) => {
+test("inactive tabs stay busy while work waits in their inbox, and pulse on a new prompt, as in the TUI", async ({
+  page,
+}) => {
+  const workspace = await openSession(page, {
+    name: "TabInbox",
+    sessions: [a, b, c],
+    inbox: [
+      {
+        id: "inb_tab_b",
+        sessionID: b.id,
+        time: { created: 1 },
+        type: "user",
+        payload: { text: "Queued follow-up" },
+        delivery: "queue",
+      },
+      // Parked synthetic context, such as a user shell's output, waits without work.
+      {
+        id: "inb_tab_c",
+        sessionID: c.id,
+        time: { created: 1 },
+        type: "synthetic",
+        payload: { text: "Shell output", description: "Shell finished" },
+        delivery: "steer",
+      },
+    ],
+  })
+
+  const tab = (id: string) => page.locator(`[data-titlebar-tab-slot]:has(a[href="${sessionHref(id)}"])`)
+  const progress = '[data-component="session-progress-indicator-v2"]'
+
+  await expect(tab(b.id).locator(progress)).toBeVisible()
+  await expect(tab(c.id).locator("[data-titlebar-tab-title]")).toHaveText(c.title)
+  await expect(tab(c.id).locator(progress)).toHaveCount(0)
+  await expect(tab(c.id).locator('[data-slot="tab-prompt-pulse"]')).toHaveCount(0)
+  // The pulse lasts one animation, so record that it appeared rather than racing its removal.
+  await tab(c.id).evaluate((element) => {
+    const observer = new MutationObserver(() => {
+      if (!element.querySelector('[data-slot="tab-prompt-pulse"]')) return
+      element.setAttribute("data-test-pulsed", "")
+      observer.disconnect()
+    })
+
+    observer.observe(element, { childList: true, subtree: true })
+  })
+
+  await workspace.push([
+    {
+      id: "evt_tab_c_prompt",
+      created: 2,
+      type: "session.inbox.enqueued",
+      durable: { aggregateID: c.id, seq: 1, version: 1 },
+      data: {
+        sessionID: c.id,
+        inboxID: "inb_tab_c_prompt",
+        item: { type: "user", payload: { text: "Another client's prompt" }, delivery: "queue" },
+      },
+    } satisfies Extract<OpenCodeEvent, { type: "session.inbox.enqueued" }>,
+  ])
+
+  await expect(tab(c.id)).toHaveAttribute("data-test-pulsed", "")
+  await expect(tab(c.id).locator('[data-slot="tab-prompt-pulse"]')).toHaveCount(0)
+  await expect(tab(c.id).locator(progress)).toBeVisible()
+  await expect(tab(a.id).locator('[data-slot="tab-prompt-pulse"]')).toHaveCount(0)
+})
+
+test("selecting a tab with waiting work waits for its transcript instead of showing only the inbox", async ({
+  page,
+}) => {
+  await openSession(page, {
+    name: "TabInboxTranscript",
+    sessions: [a, b],
+    pageMessages: (id) => ({
+      items:
+        id === b.id ? [{ id: "msg_tab_b_history", type: "user", text: "Earlier prompt", time: { created: 1 } }] : [],
+    }),
+    inbox: [
+      {
+        id: "inb_tab_b_steer",
+        sessionID: b.id,
+        time: { created: 2 },
+        type: "user",
+        payload: { text: "Pending steer" },
+        delivery: "steer",
+      },
+    ],
+  })
+  const tabB = page.locator(`[data-titlebar-tab-slot]:has(a[href="${sessionHref(b.id)}"])`)
+  // The inactive tab read its inbox, which materializes the pending steer as a transcript row.
+  await expect(tabB.locator('[data-component="session-progress-indicator-v2"]')).toBeVisible()
+
+  const transcript = await holdRoute(page, (url) => url.pathname === `/api/session/${b.id}/message`)
+  await page.locator(`[data-titlebar-tab-link][href="${sessionHref(b.id)}"]`).click()
+  await transcript.arrived
+  await expect(page.locator("[data-timeline-virtual-content]")).toHaveCount(0)
+
+  transcript.release()
+  await expect(page.locator('[data-timeline-row="UserMessage"][data-message-id="msg_tab_b_history"]')).toContainText(
+    "Earlier prompt",
+  )
+  await expect(page.locator('[data-timeline-row="UserMessage"][data-message-id="inb_tab_b_steer"]')).toContainText(
+    "Pending steer",
+  )
+})
+
+test("inactive tabs load attention and inbox, but read the transcript only on selection", async ({ page }) => {
  const reads: string[] = []
  const mutations: string[] = []
  const errors: string[] = []
@@ -282,7 +386,7 @@ test("inactive tabs load attention, but read transcript and inbox only on select

  const attention = Promise.all(
    [fixture.targetID, fixture.childID].flatMap((id) =>
-      ["permission", "form"].map((kind) =>
+      ["permission", "form", "inbox"].map((kind) =>
        page.waitForResponse((response) => new URL(response.url()).pathname === `/api/session/${id}/${kind}`),
      ),
    ),
@@ -307,16 +411,14 @@ test("inactive tabs load attention, but read transcript and inbox only on select
    state.text,
  )

-  for (const id of [fixture.sourceID, fixture.targetID]) {
-    expect(reads.filter((path) => path === `/api/session/${id}/message`)).toHaveLength(1)
+  // Every tab reads its inbox once, since waiting work keeps a tab busy; selection reuses that read.
+  for (const id of [fixture.sourceID, fixture.targetID, fixture.childID])
    expect(reads.filter((path) => path === `/api/session/${id}/inbox`)).toHaveLength(1)
-  }

-  expect(
-    reads.filter(
-      (path) => path === `/api/session/${fixture.childID}/message` || path === `/api/session/${fixture.childID}/inbox`,
-    ),
-  ).toEqual([])
+  for (const id of [fixture.sourceID, fixture.targetID])
+    expect(reads.filter((path) => path === `/api/session/${id}/message`)).toHaveLength(1)
+
+  expect(reads.filter((path) => path === `/api/session/${fixture.childID}/message`)).toEqual([])
  expect(mutations).toEqual([])
  expect(errors).toEqual([])
 })
@@ -48,7 +48,9 @@ test("routes typing to the composer unless the open terminal is focused", async
  await expect.poll(() => pty.sockets.length).toBe(1)
  pty.send("ready")
  await expect(terminal).toHaveCSS("opacity", "1")
-  await page.evaluate(() => (document.activeElement as HTMLElement | null)?.blur())
+  await page.evaluate(() => {
+    if (document.activeElement instanceof HTMLElement) document.activeElement.blur()
+  })
  await page.keyboard.type("a")
  await expect(editor).toBeFocused()
  await expect(editor).toHaveText("a")
@@ -64,6 +66,7 @@ for (const mount of ["cached", "explicit"] as const) {
      await route.continue()
    })
    const cached = { id: "pty_cached", title: "Terminal 1" }
+
    const { pty, sessions } = await mockWorkspace(page, {
      ...workspace,
      pty: mount === "cached" ? { initial: [cached] } : {},
@@ -76,14 +79,17 @@ for (const mount of ["cached", "explicit"] as const) {
            }
          : undefined,
    })
+
    await page.goto(sessionHref(sessions[0]!.id), { waitUntil: "commit" })
    await expectSessionTitle(page, "TerminalInput")
    const editor = page.locator('[data-component="composer-editor"]')
    const terminal = page.locator('[data-component="terminal"]')
+
    if (mount === "explicit") {
      await expect(editor).toBeEditable()
      await page.keyboard.press("Control+Backquote")
    }
+
    await expect(terminal).toBeVisible()
    await ghostty.promise
    await editor.click()
@@ -95,6 +101,7 @@ for (const mount of ["cached", "explicit"] as const) {
    pty.send("ready")
    await expect(terminal).toHaveCSS("opacity", "1")
    await expect(editor).toBeFocused()
+
    if (mount === "cached") expect(pty.created).toEqual([])
  })
 }
@@ -113,8 +120,40 @@ test("focuses a terminal created from the new-terminal button", async ({ page })
  await expect.poll(() => active.evaluate((element) => element.contains(document.activeElement))).toBe(true)
 })

+test("closing the last restored terminal does not create a hidden replacement", async ({ page }) => {
+  const cached = { id: "pty_cached", title: "Terminal 1" }
+
+  const { pty } = await openSession(page, {
+    ...workspace,
+    pty: { initial: [cached] },
+    seed: {
+      panes: { ses_terminalinput: { terminal: true, terminalHeight: 320 } },
+      storage: { [legacyTerminalKey()]: { active: cached.id, all: [{ ...cached, titleNumber: 1 }] } },
+    },
+  })
+
+  const terminal = page.locator('[data-component="terminal"]')
+  await expect(terminal.locator("textarea")).toHaveCount(1)
+  await expect.poll(() => pty.sockets.length).toBe(1)
+  expect(pty.created).toEqual([])
+
+  await page.locator("#terminal-panel").getByRole("button", { name: "Close terminal", exact: true }).click()
+  await expect(terminal).toBeHidden()
+  await expect.poll(() => pty.removed).toEqual([cached.id])
+  expect(pty.created).toEqual([])
+
+  await page.keyboard.press("Control+Backquote")
+  await expect(terminal.locator("textarea")).toHaveCount(1)
+  await expect.poll(() => pty.created.map((item) => item.id)).toEqual(["pty_1"])
+  await expect(page.locator("#terminal-panel").getByRole("tab", { name: "Terminal 1", exact: true })).toHaveAttribute(
+    "aria-selected",
+    "true",
+  )
+})
+
 function legacyTerminalKey() {
  const dir = base64Encode("C:/OpenCode/TerminalInput")
  const head = dir.slice(0, 12).replace(/[^a-zA-Z0-9._-]/g, "-")
+
  return `opencode.workspace.${head}.${checksum(dir) ?? "0"}.dat:workspace:terminal`
 }
@@ -28,7 +28,9 @@ import {
 } from "../utils/timeline"

 const detailed = timelinePresets[2].value
+
 const user = { id: "msg_user", type: "user", text: "Run it", time: { created: 1 } } satisfies SessionMessageInfo
+
 const completed = {
  id: "msg_assistant",
  type: "assistant",
@@ -89,28 +91,34 @@ test.describe("static projection", () => {
      ],
      { summary: { diffs: Array.from({ length: 11 }, (_, index) => summaryDiff(index)) } },
    )
+
    const aborted = assistantMessage([{ id: "prt_before_abort", type: "text", text: "Before interruption" }], {
      id: "msg_1001_assistant_aborted",
      error: { type: "MessageAbortedError", message: "Stopped" },
    })
+
    const failed = assistantMessage([{ id: "prt_after_abort", type: "text", text: "After interruption" }], {
      id: "msg_1002_assistant_failed",
      error: { type: "APIError", message: "Visible provider failure" },
      created: 1700000003000,
    })
+
    const nextUser = userMessage([userText("Second turn", { id: "prt_second_user" })], {
      id: "msg_2000_second_user",
      created: 1700000005000,
    })
+
    const nextAssistant = assistantMessage([{ id: "prt_second_text", type: "text", text: "Second response" }], {
      id: "msg_2001_second_assistant",
      parentID: "msg_2000_second_user",
      created: 1700000006000,
    })
+
    const timeline = await setupTimeline(page, {
      settings: { timelineDetail: detailed },
      messages: [firstUser, aborted, failed, nextUser, nextAssistant],
    })
+
    await timeline.send(status("idle"))
    const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
    await scroller.evaluate((element) => (element.scrollTop = 0))
@@ -140,6 +148,7 @@ test.describe("static projection", () => {
        url: "data:text/plain;base64,bm90ZXM=",
      },
    ])
+
    message.metadata = {
      displayText: "what's goin on here",
      comments: [
@@ -198,6 +207,7 @@ test.describe("static projection", () => {
      toolPart("prt_skill_break", "read", "completed", { path: "src/a.ts" }),
      toolPart("prt_skill_last", "skill", "completed", { id: "opencode" }),
    ]
+
    await setupTimeline(page, {
      settings: { timelineDetail: detailed },
      messages: [userMessage(), assistantMessage(parts)],
@@ -217,6 +227,7 @@ test.describe("static projection", () => {
      toolPart("prt_collapsed_patch", "patch", "completed", { patchText: "Update src/value.ts" }),
      toolPart("prt_collapsed_read", "read", "completed", { path: "src/value.ts" }),
    ]
+
    await setupTimeline(page, {
      messages: [userMessage(), assistantMessage(parts)],
      settings: { shellToolPartsExpanded: true },
@@ -235,6 +246,7 @@ test.describe("static projection", () => {

 test("combines adjacent patch calls and repeated files into one group", async ({ page }) => {
  const [first, second] = ["prt_patch_first", "prt_patch_second"]
+
  const timeline = await setupTimeline(page, {
    settings: { timelineDetail: { ...detailed, edit: { placement: "separate", details: "collapsed" } } },
    messages: [
@@ -258,6 +270,7 @@ test("combines adjacent patch calls and repeated files into one group", async ({
  await expect(initialFile.getByRole("button")).toHaveAttribute("aria-expanded", "true")
  await initial.evaluate((element) => {
    const row = element.closest<HTMLElement>("[data-timeline-key]")
+
    if (row) row.dataset.patchRow = "stable"
  })

@@ -292,6 +305,7 @@ test("combines adjacent patch calls and repeated files into one group", async ({
 test("keeps a failed patch in Used without losing the surviving file choice", async ({ page }) => {
  const failed = "prt_grouped_patch_failed"
  const surviving = "prt_grouped_patch_surviving"
+
  const timeline = await setupTimeline(page, {
    settings: { timelineDetail: detailed },
    messages: [
@@ -321,6 +335,7 @@ test("keeps a failed patch in Used without losing the surviving file choice", as
  await expect(file).toHaveAttribute("aria-expanded", "true")
  await group.evaluate((element) => {
    const row = element.closest<HTMLElement>("[data-timeline-key]")
+
    if (row) row.dataset.groupIdentity = "preserved"
  })

@@ -331,9 +346,11 @@ test("keeps a failed patch in Used without losing the surviving file choice", as
  )

  const failedRow = page.locator("[data-timeline-key]", { has: page.locator(`[data-timeline-part-id="${failed}"]`) })
+
  const survivingRow = page.locator("[data-timeline-key]", {
    has: page.locator(`[data-timeline-part-id="${surviving}"]`),
  })
+
  await expect(group).toHaveAttribute("data-timeline-part-ids", `${failed},${surviving}`)
  await expect(used).toHaveAttribute("aria-expanded", "true")
  await expect(failedRow).toHaveAttribute("data-timeline-key", /^assistant-part:context:/)
@@ -351,15 +368,21 @@ test("does not remount an edit diff when a sibling part arrives", async ({ page
    const attachShadow = Element.prototype.attachShadow
    Element.prototype.attachShadow = function (init) {
      count += 1
+
      return attachShadow.call(this, init)
    }
-    ;(window as Window & { __shadowRoots?: { reset(): void; count(): number } }).__shadowRoots = {
+
+    // SAFETY: this init script owns `__shadowRoots`; the probe reads below run only after it installed it.
+    const probe = window as Window & { __shadowRoots?: { reset(): void; count(): number } }
+
+    probe.__shadowRoots = {
      reset: () => {
        count = 0
      },
      count: () => count,
    }
  })
+
  const timeline = await setupTimeline(page, {
    settings: { editToolPartsExpanded: true, shellToolPartsExpanded: true, showReasoningSummaries: true },
    messages: [
@@ -401,8 +424,10 @@ test("does not remount an edit diff when a sibling part arrives", async ({ page
      ),
    ],
  })
+
  const tool = page.locator(`[data-timeline-part-id="${editID}"]`)
  await expect(tool.locator('[data-component="file"][data-mode="diff"]')).toBeVisible()
+
  const markers = () =>
    tool.evaluate((element) => {
      const nodes = [
@@ -410,12 +435,15 @@ test("does not remount an edit diff when a sibling part arrives", async ({ page
        element.querySelector('[data-component="file"][data-mode="diff"]'),
        element.closest("[data-timeline-key]"),
        element.closest("[data-timeline-row]"),
-      ] as (HTMLElement | null)[]
+      ]
+
      return {
-        markers: nodes.map((node) => node?.dataset.timelineProbe),
+        markers: nodes.map((node) => (node instanceof HTMLElement ? node.dataset.timelineProbe : undefined)),
+        // SAFETY: the init script installed `__shadowRoots` before the page loaded.
        shadowRoots: (window as Window & { __shadowRoots?: { count(): number } }).__shadowRoots!.count(),
      }
    })
+
  await tool.evaluate((element) => {
    ;[
      element,
@@ -426,7 +454,11 @@ test("does not remount an edit diff when a sibling part arrives", async ({ page
      if (!(node instanceof HTMLElement)) throw new Error("missing edit tool, diff, row, or frame")
      node.dataset.timelineProbe = "before"
    })
-    ;(window as Window & { __shadowRoots?: { reset(): void } }).__shadowRoots!.reset()
+
+    // SAFETY: the init script installed `__shadowRoots` before the page loaded.
+    const probe = window as Window & { __shadowRoots?: { reset(): void } }
+
+    probe.__shadowRoots!.reset()
  })

  await timeline.send(partUpdated(textPart("prt_sibling_text", "Streaming added a later assistant text part.")))
@@ -438,10 +470,12 @@ for (const transition of ["reasoning-end", "idle", "retry"] as const) {
  test(`stops active Thinking on ${transition} without a following tool`, async ({ page }) => {
    const id = `prt_reasoning_stop_${transition}`
    const text = "## Inspecting stability\n\nThe timeline is ready for the next step."
+
    const timeline = await setupTimeline(page, {
      messages: [userMessage(), assistantMessage([reasoningPart(id, text)], { completed: false })],
      settings: { timelineDetail: { ...detailed, thinking: { placement: "separate", details: "collapsed" } } },
    })
+
    const part = page.locator(`[data-timeline-part-id="${renderedPartID(id)}"]`)
    const trigger = part.locator('[data-slot="collapsible-trigger"]')
    await expect(page.locator('[data-timeline-row="Thinking"]')).toBeVisible()
@@ -465,6 +499,7 @@ for (const shellDefault of ["collapsed", "expanded"] as const) {
    const shellID = `prt_separate_shell_${shellDefault}`
    const output = (count: number) => Array.from({ length: count }, (_, index) => `line ${index + 1}`).join("\n")
    const assistant = assistantMessage([reasoningPart(reasoningID, "## Inspecting stability")], { completed: false })
+
    const timeline = await setupTimeline(page, {
      messages: [userMessage(), assistant],
      settings: {
@@ -475,9 +510,11 @@ for (const shellDefault of ["collapsed", "expanded"] as const) {
        },
      },
    })
+
    const thought = page.locator(
      `[data-timeline-part-id="${renderedPartID(reasoningID)}"] [data-slot="collapsible-trigger"]`,
    )
+
    const shellTrigger = page.locator(`[data-timeline-part-id="${shellID}"] [data-slot="collapsible-trigger"]`)
    const group = page.locator('[data-component="collapsed-tool-group"]')
    // One row opens the thought, the other opens and then closes it again.
@@ -485,6 +522,7 @@ for (const shellDefault of ["collapsed", "expanded"] as const) {
    await expect(page.locator('[data-timeline-row="Thinking"]')).toBeVisible()
    await expect(thought).toHaveAttribute("aria-expanded", "false")
    await thought.click()
+
    if (!thoughtOpen) await thought.click()
    await expect(thought).toHaveAttribute("aria-expanded", String(thoughtOpen))

@@ -518,6 +556,7 @@ test.describe("Working", () => {
      viewport: { width: 390, height: 900 },
      settings: { timelineDetail: { ...detailed, thinking: { placement: "separate", details: "collapsed" } } },
    })
+
    const working = page.locator('[data-component="session-working"]')
    const shimmer = working.locator('[data-component="text-shimmer"]')
    await expect(working).toHaveCount(1)
@@ -551,6 +590,7 @@ test.describe("Working", () => {
      ],
      settings: { timelineDetail: detailed },
    })
+
    const working = page.locator('[data-component="session-working"]')
    const group = page.locator('[data-component="collapsed-tool-group"]')
    await expect(working).toBeVisible()
@@ -571,16 +611,20 @@ test.describe("Working", () => {
          timelineDetail: { ...timelinePresets[0].value, shell: { placement: "separate", details: "collapsed" } },
        },
      })
+
      const working = page.locator('[data-component="session-working"]')
      await expect(working).toBeVisible()

      const id = `prt_working_${name}`
-      const input =
-        name === "shell"
-          ? { command: "printf ready" }
-          : name === "patch"
-            ? { patchText: "*** Begin Patch\n*** Add File: src/working.ts\n+export const ready = true\n*** End Patch" }
-            : { agent: "general", description: "Inspect working indicator", prompt: "Inspect the timeline." }
+
+      const input = {
+        shell: { command: "printf ready" },
+        patch: {
+          patchText: "*** Begin Patch\n*** Add File: src/working.ts\n+export const ready = true\n*** End Patch",
+        },
+        subagent: { agent: "general", description: "Inspect working indicator", prompt: "Inspect the timeline." },
+      }[name]
+
      await timeline.send(partUpdated(toolPart(id, name, "streaming", input)))
      const tool = page.locator(`[data-timeline-part-id="${id}"]`)
      await expect(tool).toBeVisible()
@@ -590,9 +634,10 @@ test.describe("Working", () => {
        name === "patch"
          ? { files: [{ ...patchFile("src/working.ts", "added"), patch: "@@ -0,0 +1 @@\n+export const ready = true" }] }
          : {}
+
      await timeline.send(partUpdated(toolPart(id, name, "running", input, { metadata })))
      await expect(tool).toContainText(
-        name === "shell" ? "printf ready" : name === "patch" ? "working.ts" : "Inspect working indicator",
+        { shell: "printf ready", patch: "working.ts", subagent: "Inspect working indicator" }[name],
      )
      await expect(working).toHaveCount(0)

@@ -627,14 +672,18 @@ test.describe("Working", () => {
        ],
      })
      const working = page.locator('[data-component="session-working"]')
+
      if (!grouped) {
        await expect(page.locator('[data-timeline-part-id="prt_background_active"]')).toBeVisible()
        await expect(working).toHaveCount(0)
+
        return
      }
+
      const trigger = page
        .locator('[data-component="collapsed-tool-group"]')
        .getByRole("button", { name: "Used 2 Shell", exact: true, includeHidden: true })
+
      await expect(trigger).toHaveAttribute("aria-expanded", "false")
      await expect(working).toBeVisible()
      await trigger.click()
@@ -666,6 +715,7 @@ test.describe("Working", () => {
    const timeline = await setupTimeline(page, {
      messages: [userMessage(), assistantMessage([], { completed: false })],
    })
+
    const working = page.locator('[data-component="session-working"]')
    await expect(working).toBeVisible()

@@ -708,7 +758,9 @@ test.describe("background shortcut", () => {
    await expect
      .poll(async () => {
        const [cardBox, hintBox] = await Promise.all([card.boundingBox(), hint.boundingBox()])
+
        if (!cardBox || !hintBox) return undefined
+
        return { aligned: Math.abs(cardBox.x - hintBox.x) < 2, ordered: cardBox.y < hintBox.y }
      })
      .toEqual({ aligned: true, ordered: true })
@@ -729,11 +781,11 @@ test.describe("background shortcut", () => {
                "prt_grouped_active",
                name,
                "running",
-                name === "shell"
-                  ? { command: "sleep 10" }
-                  : name === "subagent"
-                    ? { agent: "general", description: "Inspect the timeline", prompt: "Inspect it." }
-                    : { filePath: "src/working.ts" },
+                {
+                  read: { filePath: "src/working.ts" },
+                  shell: { command: "sleep 10" },
+                  subagent: { agent: "general", description: "Inspect the timeline", prompt: "Inspect it." },
+                }[name],
              ),
            ],
            { completed: false },
@@ -745,19 +797,24 @@ test.describe("background shortcut", () => {
      const trigger = group.locator(':scope > [data-component="collapsible"] > [data-slot="collapsible-trigger"]')
      await expect(trigger).toHaveAttribute("aria-expanded", "false")
      await expect(working).toBeInViewport()
+
      if (name !== "read") {
        await expect(backgroundHint(page)).toBeInViewport()
        await expect(page.locator('[data-component="session-background-hint-row"]')).toHaveCSS("height", "24px")
      }
+
      await trigger.click()
      await expect(trigger).toHaveAttribute("aria-expanded", "true")
+
      if (name === "subagent") await expect(group.getByText("Inspect the timeline", { exact: true })).toBeVisible()
+
      if (name !== "subagent")
        await expect(group.locator('[data-component="text-shimmer"][data-active="true"]')).toBeVisible()
      await expect(working).toBeVisible()
      await trigger.click()
      await expect(trigger).toHaveAttribute("aria-expanded", "false")
      await expect(working).toBeVisible()
+
      if (name !== "read") await expectBackgroundRequest(page)
    })
  }
@@ -765,6 +822,7 @@ test.describe("background shortcut", () => {
  test("separates blocking and already-backgrounded work into two rows", async ({ page }) => {
    const backgroundID = "ses_background_existing"
    const blockingID = "ses_background_blocking"
+
    const timeline = await setupTimeline(page, {
      settings: { timelineDetail: detailed },
      sessionMessages: [
@@ -781,7 +839,7 @@ test.describe("background shortcut", () => {
              name: "subagent",
              state: {
                status: "completed",
-                input: { description: "Background task" },
+                input: { description: "Background task", agent: "explore" },
                content: [{ type: "text", text: "working" }],
                metadata: { sessionID: backgroundID, status: "running" },
              },
@@ -814,7 +872,7 @@ test.describe("background shortcut", () => {
              name: "subagent",
              state: {
                status: "running",
-                input: { description: "Foreground task" },
+                input: { description: "Foreground task", agent: "build" },
                metadata: { sessionID: blockingID },
              },
              time: { created: 4 },
@@ -825,8 +883,8 @@ test.describe("background shortcut", () => {
      ],
      sessions: [
        session(),
-        session({ id: backgroundID, parentID: sessionID, title: "Background task" }),
-        session({ id: blockingID, parentID: sessionID, title: "Foreground task" }),
+        session({ id: backgroundID, parentID: sessionID, title: "Background task", agent: "explore" }),
+        session({ id: blockingID, parentID: sessionID, title: "Foreground task", agent: "build" }),
      ],
      sessionStatus: {
        [sessionID]: { type: "busy" },
@@ -855,27 +913,58 @@ test.describe("background shortcut", () => {
    })
    const backgroundCard = page.locator('[data-timeline-part-id="call_backgrounded"]')
    await expect(backgroundHint(page)).toBeVisible()
+
    const used = page
      .locator('[data-timeline-part-ids="call_backgrounded,call_shell_backgrounded,call_blocking"]')
      .locator(':scope > [data-component="collapsible"] > [data-slot="collapsible-trigger"]')
+
    await expect(used).toHaveText(/^Used\s*3\s*Agent, Shell$/)
    await expect(used).toHaveAttribute("aria-expanded", "false")
-    await used.click()
+    await page.getByRole("button", { name: "3 running", exact: true }).click()
+    const list = page.getByRole("menu", { name: "3 running", exact: true })
+    await expect(list.getByRole("menuitem")).toHaveText([
+      /^Build\s*Foreground task$/,
+      /^Explore\s*Background task$/,
+      /^Shell\s*sleep 120$/,
+    ])
+    await list.getByRole("menuitem", { name: /sleep 120/ }).click()
+    await expect(list).toHaveCount(0)
    await expect(used).toHaveAttribute("aria-expanded", "true")
-    await page.getByRole("button", { name: "Session details" }).click()
-    const summary = page.getByRole("button", { name: "2 background tasks running", exact: true })
-    await expect(summary).toContainText("2")
-    await summary.click()
-    const list = page.locator('[data-component="session-background-list"]')
-    await expect(list).toContainText("Background task")
-    await expect(list).toContainText("sleep 120")
-    await expect(list).not.toContainText("Foreground task")
+    const shellCall = page.locator('[data-timeline-part-id="call_shell_backgrounded"]')
+    await expect(shellCall.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "true")
+    await expect(shellCall).toBeInViewport()
+
+    await page.getByRole("button", { name: "3 running", exact: true }).click()
+
+    const interrupt = page.waitForRequest(
+      (request) =>
+        request.method() === "POST" && new URL(request.url()).pathname === `/api/session/${blockingID}/interrupt`,
+    )
+
+    const foreground = list.getByRole("menuitem", { name: /Foreground task/ })
+
+    await foreground.hover()
+    await foreground.getByRole("button", { name: "Interrupt subagent", exact: true }).click()
+    await interrupt
+    await expect(list).toBeVisible()
+
+    const kill = page.waitForRequest(
+      (request) => request.method() === "DELETE" && new URL(request.url()).pathname === "/api/shell/shell_backgrounded",
+    )
+
+    await list.getByRole("menuitem", { name: /sleep 120/ }).hover()
+    await page.keyboard.press("Delete")
+    await kill
+    await page.keyboard.press("Escape")
+    await expect(list).toHaveCount(0)
    await expect(backgroundCard).toContainText("Background task (background)")
    await expect(backgroundCard.locator('[data-component="session-progress-indicator-v2"]')).toBeVisible()
    await expect(
      page.locator('[data-timeline-part-id="call_shell_backgrounded"] [data-component="text-shimmer"]'),
    ).toHaveAttribute("data-active", "true")

+    // SAFETY: the transport forwards this payload unchanged, and the client marks a session idle from
+    // `type` and `data.sessionID` alone; the child session's event needs no durable metadata here.
    await timeline.transport.send({
      id: "evt_background_succeeded",
      created: Date.now(),
@@ -885,6 +974,116 @@ test.describe("background shortcut", () => {
    await expect(backgroundCard.locator('[data-component="session-progress-indicator-v2"]')).toHaveCount(0)
    await expect(backgroundCard).toContainText("Background task (background)")
  })
+
+  test("moves between siblings and to the parent's shell from inside a subagent", async ({ page }) => {
+    const siblings = [
+      { id: "ses_sibling_one", agent: "explore", description: "Draft TUI proposal" },
+      { id: "ses_sibling_two", agent: "build", description: "Fix context controls" },
+    ]
+
+    const timeline = await setupTimeline(page, {
+      settings: { timelineDetail: detailed },
+      sessionMessages: [
+        user,
+        {
+          id: "msg_sibling_shell",
+          type: "assistant",
+          agent: "build",
+          model: { id: "model", providerID: "provider" },
+          content: [
+            {
+              type: "tool",
+              id: "call_sibling_shell",
+              name: "shell",
+              state: {
+                status: "completed",
+                input: { command: "sleep 120" },
+                content: [{ type: "text", text: "working" }],
+                metadata: { shellID: "shell_sibling", status: "running" },
+              },
+              time: { created: 2, completed: 3 },
+            },
+          ],
+          time: { created: 2, completed: 3 },
+        },
+        {
+          id: "msg_siblings",
+          type: "assistant",
+          agent: "build",
+          model: { id: "model", providerID: "provider" },
+          content: siblings.map((item) => ({
+            type: "tool" as const,
+            id: `call_${item.id}`,
+            name: "subagent",
+            state: {
+              status: "running" as const,
+              input: { description: item.description, agent: item.agent },
+              metadata: { sessionID: item.id },
+            },
+            time: { created: 2 },
+          })),
+          time: { created: 2 },
+        },
+      ],
+      sessions: [
+        session(),
+        ...siblings.map((item) =>
+          session({ id: item.id, parentID: sessionID, title: item.description, agent: item.agent }),
+        ),
+      ],
+      sessionStatus: Object.fromEntries(
+        [sessionID, ...siblings.map((item) => item.id)].map((id) => [id, { type: "busy" }]),
+      ),
+    })
+
+    await timeline.transport.send({
+      id: "evt_sibling_shell_created",
+      created: 3,
+      type: "shell.created",
+      location: { directory },
+      data: {
+        info: {
+          id: "shell_sibling",
+          status: "running",
+          command: "sleep 120",
+          cwd: directory,
+          shell: "bash",
+          file: "/tmp/sibling.out",
+          metadata: { sessionID },
+          time: { started: 2 },
+        },
+      },
+    })
+
+    const header = page.locator("[data-session-title]")
+    const trigger = header.getByRole("button", { name: "3 running", exact: true })
+    const list = page.getByRole("menu", { name: "3 running", exact: true })
+
+    await trigger.click()
+    await list.getByRole("menuitem", { name: /Draft TUI proposal/ }).click()
+    await expect(page).toHaveURL(/\/session\/ses_sibling_one$/)
+
+    await trigger.click()
+    await expect(list.getByRole("menuitem")).toHaveText([
+      /^Explore\s*Draft TUI proposal/,
+      /^Build\s*Fix context controls/,
+      /^Shell\s*sleep 120/,
+    ])
+    await expect(list.getByRole("menuitem", { name: /Draft TUI proposal/ })).toHaveAttribute("aria-current", "page")
+    await expect(list.getByRole("menuitem", { name: /Fix context controls/ })).not.toHaveAttribute("aria-current")
+    await list.getByRole("menuitem", { name: /Fix context controls/ }).click()
+    await expect(page).toHaveURL(/\/session\/ses_sibling_two$/)
+
+    // The shell call lives in the parent: the row opens it there, expanded.
+    await trigger.click()
+    await list.getByRole("menuitem", { name: /sleep 120/ }).click()
+    await expect(page).toHaveURL(new RegExp(`/session/${sessionID}$`))
+
+    const shellCall = page.locator('[data-timeline-part-id="call_sibling_shell"]')
+
+    await expect(shellCall.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "true")
+    await expect(shellCall).toBeInViewport()
+  })
 })

 test.describe("compaction", () => {
@@ -916,6 +1115,7 @@ test.describe("compaction", () => {
      .poll(async () => {
        const summary = await compaction.locator('[data-component="text-part"]').boundingBox()
        const status = await running.boundingBox()
+
        return !!summary && !!status && status.y >= summary.y + summary.height
      })
      .toBe(true)
@@ -937,6 +1137,7 @@ test.describe("compaction", () => {
      .poll(async () => {
        const summary = await compaction.locator('[data-component="text-part"]').boundingBox()
        const done = await compaction.getByText("Session compacted", { exact: true }).boundingBox()
+
        return !!summary && !!done && done.y >= summary.y + summary.height
      })
      .toBe(true)
@@ -971,16 +1172,21 @@ test.describe("compaction", () => {
      shown: undefined,
    },
  } as const
+
  const labels = Object.values(outcomes).map((outcome) => outcome.label)

  // Failed then cancelled share one history, so each boundary must keep its own outcome.
  for (const names of [["failed", "cancelled"], ["interrupted"]] as const) {
    test(`ends running compactions as ${names.join(", then ")}`, async ({ page }) => {
-      const timeline = await setupTimeline(page, {
-        sessionMessages: [user, completed],
-        ...(names[0] === "interrupted" ? { sessionStatus: { [sessionID]: { type: "busy" as const } } } : {}),
-      })
+      const timeline = await setupTimeline(
+        page,
+        names[0] === "interrupted"
+          ? { sessionMessages: [user, completed], sessionStatus: { [sessionID]: { type: "busy" } } }
+          : { sessionMessages: [user, completed] },
+      )
+
      const compactions = page.locator('[data-component="session-compaction-message"]')
+
      for (const [index, name] of names.entries()) {
        const outcome = outcomes[name]
        await timeline.send(compactionStarted({ sessionID, reason: outcome.reason, recent: "" }))
@@ -988,36 +1194,45 @@ test.describe("compaction", () => {
        await expect(compactions).toHaveCount(index + 1)
        const compaction = compactions.nth(index)
        await expect(compaction).toContainText(outcome.partial)
+
        if (name === "interrupted") {
          await expect(compaction.getByRole("status").getByLabel("Compacting", { exact: true })).toBeVisible()
+
          const request = page.waitForRequest(
            (request) =>
              request.method() === "POST" && new URL(request.url()).pathname === `/api/session/${sessionID}/interrupt`,
          )
+
          await page.getByRole("button", { name: "Stop", exact: true }).click()
          await request
        }
+
        await timeline.send(compactionFailed({ sessionID, reason: outcome.reason, error: outcome.error }))
        await expect(compaction.getByText(outcome.label, { exact: true })).toBeVisible()
      }

      await expect(compactions).toHaveCount(names.length)
+
      for (const [index, name] of names.entries()) {
        const outcome = outcomes[name]
        const compaction = compactions.nth(index)
        await expect(compaction.getByText("Session compaction started", { exact: true })).toBeVisible()
        await expect(compaction.getByText(outcome.label, { exact: true })).toBeVisible()
+
        for (const other of labels.filter((label) => label !== outcome.label))
          await expect(compaction.getByText(other, { exact: true })).toHaveCount(0)
        await expect(compaction.getByText("Session compacted", { exact: true })).toHaveCount(0)
        await expect(compaction.getByRole("status")).toHaveCount(0)
        await expect(compaction).not.toContainText(outcome.partial)
+
        if (outcome.shown) await expect(compaction.getByText(outcome.shown, { exact: true })).toBeVisible()
+
        if (!outcome.shown) await expect(compaction).not.toContainText(outcome.error.message)
      }
    })
  }
 })
+
 test("reducer-hardening: converges when idle arrives before final part and message completion", async ({ page }) => {
  const textID = "prt_event_order_text"
  const assistant = assistantMessage([textPart(textID, "Partial")], { completed: false })
@@ -1048,11 +1263,13 @@ test("changes timeline presets and saves custom thinking details", async ({ page
  const slider = settings.getByRole("slider", { name: "Timeline detail", exact: true })
  await expect(slider).toBeEnabled()
  await slider.press("Home")
+
  for (const [index, name] of ["Messages only", "Quiet", "Compact", "Detailed", "Everything"].entries()) {
    if (index) await slider.press("ArrowRight")
    await expect(slider).toHaveValue(String(index))
    await expect(slider).toHaveAttribute("aria-valuetext", name)
  }
+
  await slider.press("End")
  await settings.getByRole("button", { name: "Advanced", exact: true }).click()
  const grouped = settings.getByRole("switch", { name: "Thinking grouped", exact: true })
@@ -1132,6 +1349,7 @@ test.describe("shell completion", () => {
        ],
        time: { created: 2, completed: 3 },
      }
+
      const state = { finished: false, requests: 0 }
      // Larger than one server page (65,536 bytes), so the final output is read in two pages. The card shows its most
      // recent 64 KiB.
@@ -1141,9 +1359,11 @@ test.describe("shell completion", () => {
      const reads: number[] = []
      page.on("request", (request) => {
        const url = new URL(request.url())
+
        if (url.pathname === `/api/shell/${background.id}/output`)
          reads.push(Number(url.searchParams.get("cursor") ?? 0))
      })
+
      const timeline = await setupTimeline(page, {
        viewport: { width: grouped ? 390 : 1400, height: 900 },
        settings: { shellToolPartsExpanded: !grouped },
@@ -1156,15 +1376,19 @@ test.describe("shell completion", () => {
        shellOutput: ({ id }) => {
          if (id !== background.id) return "Checking project\n"
          state.requests++
+
          return state.finished ? finished : "Checking project\n"
        },
      })
+
      await page.clock.install()
      await page.reload()
      await timeline.transport.waitForConnection()
+
      const groupTrigger = page
        .locator('[data-component="collapsed-tool-group"]')
        .locator(':scope > [data-component="collapsible"] > [data-slot="collapsible-trigger"]')
+
      if (grouped) {
        await expect(page.locator('[data-component="collapsed-tool-group"]')).toHaveAttribute(
          "data-timeline-part-ids",
@@ -1173,11 +1397,13 @@ test.describe("shell completion", () => {
        await expect(groupTrigger).toHaveAttribute("aria-expanded", "false")
        await groupTrigger.click()
      }
+
      const card = page.locator(`[data-timeline-part-id="call_${background.id}"]`)
      const shimmer = card.locator('[data-component="text-shimmer"]')
      const other = page.locator('[data-timeline-part-id="call_sh_other"] [data-component="text-shimmer"]')
      await expect(shimmer).toHaveAttribute("data-active", "true")
      await expect(other).toHaveAttribute("data-active", "true")
+
      if (grouped) await card.locator('[data-slot="collapsible-trigger"]').click()
      await expect(card.locator('[data-slot="bash-result"]')).toHaveText("Checking project")

@@ -1202,9 +1428,11 @@ test.describe("shell completion", () => {

      reads.length = 0
      await page.reload()
+
      if (grouped) await groupTrigger.click()
      await expect(shimmer).toHaveAttribute("data-active", "false")
      await expect(other).toHaveAttribute("data-active", "true")
+
      // An expanded card reads the exited shell's final output from the start, again in two pages.
      if (grouped) return
      await expect(card.locator('[data-slot="bash-result"]')).toHaveText(tail)
@@ -1240,6 +1468,7 @@ test.describe("shell completion", () => {
      ],
      shellOutput: ({ id }) => (id === background.id ? "Checking project\n" : undefined),
    })
+
    const card = page.locator('[data-timeline-part-id="call_foreground"]')
    const shimmer = card.locator('[data-component="text-shimmer"]')
    await expect(shimmer).toHaveAttribute("data-active", "true")
@@ -1290,6 +1519,7 @@ async function expectBackgroundRequest(page: Page) {
    (request) =>
      request.method() === "POST" && new URL(request.url()).pathname === `/api/session/${sessionID}/background`,
  )
+
  await page.keyboard.press("Control+b")
  await request
 }
@@ -1298,12 +1528,11 @@ function patchFile(file: string, status: "added" | "modified" | "deleted") {
  return {
    file,
    status,
-    patch:
-      status === "added"
-        ? "@@ -0,0 +1 @@\n+export const after = true"
-        : status === "deleted"
-          ? "@@ -1 +0,0 @@\n-export const before = true"
-          : "@@ -1 +1 @@\n-export const before = true\n+export const after = true",
+    patch: {
+      added: "@@ -0,0 +1 @@\n+export const after = true",
+      deleted: "@@ -1 +0,0 @@\n-export const before = true",
+      modified: "@@ -1 +1 @@\n-export const before = true\n+export const after = true",
+    }[status],
    additions: status === "deleted" ? 0 : 1,
    deletions: status === "added" ? 0 : 1,
  }
@@ -1,6 +1,6 @@
 import { expect, test, type Page } from "@playwright/test"
 import pkg from "../../package.json" with { type: "json" }
-import type { SeedInput } from "../utils/app"
+import { SERVER, type SeedInput } from "../utils/app"
 import { openHeldStart } from "../utils/direction"
 import { expectAppVisible } from "../utils/waits"
 import { mockWorkspace } from "../utils/workspace"
@@ -111,7 +111,23 @@ test("Don't show these in the future turns release notes off and closes What's N
  await expect.poll(() => stored(page, RELEASE_NOTES)).toEqual({ enabled: false })
 })

-test("What's New opened after the attachment mounts waits for the routes, then keeps focus over restored Settings", async ({ page }) => {
+test("a rejected update check shows one failure title without repeating it as a description", async ({ page }) => {
+  await mockWorkspace(page, { name: "UpdateCheck", sessions: [] })
+  await page.goto(
+    `/e2e/utils/settings-wsl.html?${new URLSearchParams({ server: SERVER, mode: "stopped", updater: "" })}`,
+  )
+  const settings = page.getByTestId("settings-screen")
+  const check = settings.getByRole("button", { name: "Check now", exact: true })
+  await expect(check).toBeEnabled()
+  await check.click()
+  await expect(page.getByText("Request failed", { exact: true })).toBeVisible()
+  await expect(page.getByText("Request failed", { exact: true })).toHaveCount(1)
+  await expect(page.getByText("You're up to date", { exact: true })).toHaveCount(0)
+})
+
+test("What's New opened after the attachment mounts waits for the routes, then keeps focus over restored Settings", async ({
+  page,
+}) => {
  const held = Promise.withResolvers<void>()
  await serveChangelog(page, changelog, held.promise)
  await mockWorkspace(page, { name: "Whats New", sessions: [], seed: upgraded })
@@ -1,16 +1,31 @@
-import { Schema, SchemaGetter } from "effect"
+import { Predicate, Schema, SchemaGetter } from "effect"
 import { HttpApi, HttpApiEndpoint, HttpApiGroup, HttpApiSchema } from "effect/unstable/httpapi"
 import { Pty } from "@opencode/schema/pty"
 import { Worktree } from "@opencode/schema/worktree"

+// Handlers answer plain fixture data: undefined properties are dropped, and other non-JSON values become null.
 const Json = Schema.Json.pipe(
  Schema.decodeTo(Schema.Unknown, {
    decode: SchemaGetter.passthrough(),
-    encode: SchemaGetter.transform(jsonValue),
+    encode: SchemaGetter.transform(function json(value): Schema.Json {
+      if (value === null || Predicate.isString(value) || Predicate.isBoolean(value)) return value
+
+      if (Predicate.isNumber(value)) return Number.isFinite(value) ? value : null
+
+      if (Array.isArray(value)) return value.map(json)
+
+      if (!Predicate.isObject(value)) return null
+
+      return Object.fromEntries(
+        Object.entries(value).flatMap(([key, item]) => (item === undefined ? [] : [[key, json(item)]])),
+      )
+    }),
  }),
  HttpApiSchema.asJson(),
 )
+
 const JsonPayload = Schema.Unknown.pipe(HttpApiSchema.asJson())
+
 const Query = Schema.Struct({
  directory: Schema.optional(Schema.String),
  parentID: Schema.optional(Schema.String),
@@ -23,8 +38,11 @@ const Query = Schema.Struct({
  type: Schema.optional(Schema.String),
  mode: Schema.optional(Schema.String),
 })
+
 const SessionParams = { sessionID: Schema.String }
+
 const PtyParams = { ptyID: Pty.ID }
+
 const NoContent = HttpApiSchema.NoContent

 export class MockNotFound extends Schema.TaggedError<MockNotFound>()("MockNotFound", {
@@ -45,10 +63,16 @@ export class MockShellNotFound extends Schema.TaggedError<MockShellNotFound>()("
  message: Schema.String,
 }) {}

+// The server's error for a request without its password.
+export class MockUnauthorized extends Schema.TaggedError<MockUnauthorized>()("UnauthorizedError", {
+  message: Schema.String,
+}) {}
+
 // A mutation the scenario did not configure a handler for.
 export class MockUnsupported extends Schema.TaggedError<MockUnsupported>()("MockUnsupported", {
  message: Schema.String,
 }) {}
+
 const Unsupported = MockUnsupported.pipe(HttpApiSchema.status(501))

 const Group = HttpApiGroup.make("mock")
@@ -195,6 +219,12 @@ const Group = HttpApiGroup.make("mock")
      error: MockShellNotFound.pipe(HttpApiSchema.status(404)),
    }),
  )
+  .add(
+    HttpApiEndpoint.delete("shellRemove", "/api/shell/:id", {
+      params: { id: Schema.String },
+      success: NoContent,
+    }),
+  )
  .add(
    HttpApiEndpoint.get("ptyList", "/api/pty", {
      success: Json,
@@ -303,6 +333,13 @@ const Group = HttpApiGroup.make("mock")
      success: Json,
    }),
  )
+  .add(
+    HttpApiEndpoint.post("sessionCompact", "/api/session/:sessionID/compact", {
+      params: SessionParams,
+      payload: JsonPayload,
+      success: Json,
+    }),
+  )
  .add(
    HttpApiEndpoint.post("sessionCommand", "/api/session/:sessionID/command", {
      params: SessionParams,
@@ -368,6 +405,12 @@ const Group = HttpApiGroup.make("mock")
  )
  .add(
    HttpApiEndpoint.post("sessionInterrupt", "/api/session/:sessionID/interrupt", {
+      params: SessionParams,
+      success: Json,
+    }),
+  )
+  .add(
+    HttpApiEndpoint.post("sessionWait", "/api/experimental/session/:sessionID/wait", {
      params: SessionParams,
      success: NoContent,
    }),
@@ -409,13 +452,3 @@ const Group = HttpApiGroup.make("mock")
  )

 export const MockApi = HttpApi.make("mock").add(Group)
-
-function jsonValue(value: unknown): Schema.Json {
-  if (value === null || typeof value === "string" || typeof value === "boolean") return value
-  if (typeof value === "number") return Number.isFinite(value) ? value : null
-  if (Array.isArray(value)) return value.map(jsonValue)
-  if (!value || typeof value !== "object") return null
-  return Object.fromEntries(
-    Object.entries(value).flatMap(([key, item]) => (item === undefined ? [] : [[key, jsonValue(item)]])),
-  )
-}
@@ -29,6 +29,8 @@ export function mount(input: {
  ssh?: string | null
  storage?: string | null
  hold?: string | null
+  /** Enables the updater Ipc; check and install reject with this message, which may be empty. */
+  updater?: string | null
 }) {
  const root = document.getElementById("root")

@@ -174,6 +176,7 @@ export function mount(input: {
    const bridge: Bridge = {
      packaged: false,
      async call(request) {
+        if (request.ipc === "updater" && input.updater != null) throw new Error(input.updater)
        const method = methods.get(request.ipc)?.[request.method]

        if (!method) throw new Error("Unexpected fixture action")
@@ -184,6 +187,8 @@ export function mount(input: {
        return result ?? null
      },
      async subscribe(ipc) {
+        if (ipc === "updater" && input.updater != null) return { available: true, state: { status: "idle" } }
+
        if (ipc === "wsl" || ipc === "ssh") return { available: true, state: snapshot(ipc) }

        return { available: false }
Author	SHA1	Message	Date
Aiden Cline	494af523d1	feat(core): allow shell for explore	2026-10-04 23:31:43 -05:00
Aiden ClineandPadure Sergio	cb389aa679	fix(core): honor compaction agent model for summaries (#53276 ) Co-authored-by: Padure Sergio <70955746+sergiopadure@users.noreply.github.com>	2026-10-04 23:20:24 -05:00
Aiden Cline	30f4119459	fix(ai): place Anthropic system updates before the next assistant turn (#52568 )	2026-10-04 23:17:15 -05:00
opencode-agent[bot]	4d17cf719f	chore: update nix node_modules hashes	2026-10-05 04:15:19 +00:00
Aiden Cline	498b1deda3	feat(ai): add native Venice provider (#53271 )	2026-10-04 23:06:43 -05:00
Kit Langton	25c54cbdf7	fix(client): wait for service shutdown before restart (#50042 )	2026-10-04 20:59:19 -07:00
Luke Parker	ae57dd0cf5	fix(app): close the running menu before opening a subagent (#53273 )	2026-10-05 13:58:19 +10:00
usrnk1andLuke Parker	e86ec98711	feat(desktop): move review controls into their panels (#51312 ) Co-authored-by: Luke Parker <10430890+Hona@users.noreply.github.com>	2026-10-05 03:18:48 +00:00
Luke Parker	c542a43503	fix(cli): indent every row of the pairing QR code on Windows (#53265 )	2026-10-05 03:02:36 +00:00
Luke Parker	2db9c2e1b3	fix(app): match TUI inbox, steer, queue, and revert behavior (#53076 )	2026-10-05 12:54:06 +10:00
Luke Parker	3a861ff8b0	feat(app): show running subagents and shells in the session header (#53247 )	2026-10-05 12:30:44 +10:00
Aiden Cline	22803892bc	feat(ai): support Anthropic Messages on Bedrock Mantle (#53073 )	2026-10-04 20:51:33 -05:00
Aiden Cline	69ba898a7b	perf(ai): lazily parse partial JSON on tool-input-delta (#53255 )	2026-10-04 20:41:46 -05:00
opencode-agent[bot]andrekram1-node	375ff827aa	feat(tui): show read ranges after file paths (#53250 ) Co-authored-by: rekram1-node <rekram1-node@users.noreply.github.com>	2026-10-04 20:14:48 -05:00
Luke Parker	ed747091e9	fix(gui-extensions): hold agent previews for sessions that are not on screen (#53249 )	2026-10-05 00:56:05 +00:00
Aiden Cline	44193bd71f	refactor(ai): untrace stream event handlers and inner protocol helpers (#53232 )	2026-10-04 19:43:29 -05:00
Aiden Cline	238d4cf5ca	refactor(ai): simplify sseFraming and untrace inner request-lowering helpers (#53072 )	2026-10-04 16:27:06 -05:00
Kit Langton	3e77d5c170	fix(client): preserve service on protocol-only reconnect mismatch (#50825 )	2026-10-04 13:30:43 -07:00
Kit Langton	eaf80d99e5	chore(app): clear lint warnings in GUI files touched by the Effect upgrade (#53098 )	2026-10-04 12:04:16 -07:00
opencode-agent[bot]	0a46301e36	chore(core): refresh bundled models.dev snapshot	2026-10-04 13:59:27 +00:00
Shoubhit Dash	c789aa16d1	refactor(ai): remove unused test code (#53126 )	2026-10-04 17:07:07 +05:30
Shoubhit Dash	a515e3bf4b	refactor(ai): delete unregistered recording cassettes (#53127 )	2026-10-04 17:06:42 +05:30
Shoubhit Dash	8380c864bf	feat(plugin): add select dialog search and actions (#53009 )	2026-10-04 16:10:27 +05:30
Shoubhit Dash	247eb5cc9a	fix(tui): allow plugin keymaps during setup (#53010 )	2026-10-04 15:46:34 +05:30
Luke Parker	ecfa884ff8	feat(session-ui): show model variant in message meta (#53112 )	2026-10-04 08:21:24 +00:00
Luke Parker	0d536d2d7d	fix(gui-extensions): avoid startup round trip and keep renamed enable state (#53077 )	2026-10-04 17:40:36 +10:00
Luke Parker	715de7af15	fix(gui-extensions): fix stale details, browser cleanup, update checks and panel state (#53075 )	2026-10-04 17:21:04 +10:00
Luke Parker	077444b94b	fix(app): keep side panel tabs when a session moves (#53081 )	2026-10-04 16:59:52 +10:00
Luke Parker	5589ca43f1	refactor(gui-extensions): tighten the SDK surface (#53078 )	2026-10-04 16:59:43 +10:00
Luke Parker	453dd2ad01	fix(app): load Windows-path markdown images (#53100 )	2026-10-04 06:49:36 +00:00
Luke Parker	44579a5d98	test(app): mock session wait and parse e2e mock payloads (#53095 )	2026-10-04 16:32:34 +10:00
Luke Parker	f8cafd8362	fix(app): stop the browser address bar looking bold when selected (#53087 )	2026-10-04 16:23:08 +10:00
Kit Langton	9155b7b791	fix(app): load component-test modules at the URLs Vite imports them by (#53091 )	2026-10-04 16:06:48 +10:00
Kit Langton	9c66a0acb0	refactor(tui): remove unused plugin theme registration (#52992 )	2026-10-03 21:50:55 -07:00
Kit Langton	ee730bdd91	refactor(tui): remove unused V1 syntax theme generation (#52987 )	2026-10-03 21:43:07 -07:00
Kit Langton	cfbdefa041	refactor(tui): trim unused package exports (#52988 )	2026-10-03 21:43:03 -07:00