fix(app): keep active tools in existing groups (#45462)

Wait for bounded plugin readiness in the generation location before resolving explicit or default models. Add deterministic cold-first-request regressions through the embedded SDK.

.changeset/rename-undo.md

@@ -0,0 +1,5 @@
+---
+"@opencode-ai/core": patch
+---
+
+Include both paths of renamed files in new snapshot change lists so undo restores the original file instead of only deleting the renamed file.

.changeset/shell-scanner-compatibility.md

@@ -0,0 +1,10 @@
+---
+"@opencode-ai/core": patch
+---
+
+Make the experimental portable shell scanner authoritative, with no Tree-sitter
+fallback. Scan common Bash and PowerShell control flow, heredocs, functions,
+expressions, quoting, and substitutions natively. Preserve existing redirect and
+declaration permission matching, and make PowerShell saved approvals cover the
+original command spelling. Parser failures remain visible without changing the
+permission engine. The default Tree-sitter path is unchanged.

.github/workflows/test.yml

@@ -237,9 +237,9 @@ jobs:
         working-directory: packages/app
         run: bunx playwright install chromium
 
-      - name: Run app e2e tests
+      - name: Run app e2e tests against production build
         if: env.E2E_ENABLED == 'true'
-        run: bun --cwd packages/app test:e2e:local
+        run: bun --cwd packages/app test:e2e:built
         env:
           CI: true
         timeout-minutes: 30

bun.lock

@@ -125,7 +125,7 @@
         "@effect/platform-node": "catalog:",
         "@opencode-ai/client": "workspace:*",
         "@opencode-ai/plugin": "workspace:*",
-        "@opencode-ai/pty": "0.1.10",
+        "@opencode-ai/pty": "0.1.12",
         "@opencode-ai/schema": "workspace:*",
         "@opencode-ai/server": "workspace:*",
         "@opencode-ai/tui": "workspace:*",
@@ -364,7 +364,7 @@
         "@opencode-ai/ai": "workspace:*",
         "@opencode-ai/codemode": "workspace:*",
         "@opencode-ai/plugin": "workspace:*",
-        "@opencode-ai/pty": "0.1.10",
+        "@opencode-ai/pty": "0.1.12",
         "@opencode-ai/schema": "workspace:*",
         "@opencode-ai/util": "workspace:*",
         "@parcel/watcher": "2.5.1",
@@ -553,6 +553,20 @@
         "@typescript/native-preview": "catalog:",
       },
     },
+    "packages/latex": {
+      "name": "@opencode-ai/latex",
+      "version": "0.0.0",
+      "dependencies": {
+        "@opencode-ai/plugin": "workspace:*",
+        "@opentui/core": "catalog:",
+        "string-width": "catalog:",
+      },
+      "devDependencies": {
+        "@tsconfig/bun": "catalog:",
+        "@types/bun": "catalog:",
+        "@typescript/native-preview": "catalog:",
+      },
+    },
     "packages/merman": {
       "name": "@opencode-ai/merman",
       "version": "0.0.0",
@@ -879,6 +893,7 @@
       "dependencies": {
         "@opencode-ai/client": "workspace:*",
         "@opencode-ai/core": "workspace:*",
+        "@opencode-ai/latex": "workspace:*",
         "@opencode-ai/merman": "workspace:*",
         "@opencode-ai/plugin": "workspace:*",
         "@opencode-ai/schema": "workspace:*",
@@ -2150,6 +2165,8 @@
 
     "@opencode-ai/httpapi-codegen": ["@opencode-ai/httpapi-codegen@workspace:packages/httpapi-codegen"],
 
+    "@opencode-ai/latex": ["@opencode-ai/latex@workspace:packages/latex"],
+
     "@opencode-ai/merman": ["@opencode-ai/merman@workspace:packages/merman"],
 
     "@opencode-ai/plugin": ["@opencode-ai/plugin@workspace:packages/plugin"],
@@ -2158,19 +2175,19 @@
 
     "@opencode-ai/protocol": ["@opencode-ai/protocol@workspace:packages/protocol"],
 
-    "@opencode-ai/pty": ["@opencode-ai/pty@0.1.10", "", { "optionalDependencies": { "@opencode-ai/pty-darwin-arm64": "0.1.10", "@opencode-ai/pty-darwin-x64": "0.1.10", "@opencode-ai/pty-linux-arm64-gnu": "0.1.10", "@opencode-ai/pty-linux-arm64-musl": "0.1.10", "@opencode-ai/pty-linux-x64-gnu": "0.1.10", "@opencode-ai/pty-linux-x64-musl": "0.1.10" }, "bin": { "opencode-pty": "bin/opencode-pty.js" } }, "sha512-cEJT1ADtmnb+df2wrlUcsGny6Q7pTe9Sa7keISzCO0xN1FrL1aS6+eleBPpDimHjgM/sXqvLwJv0UiAeiAvgxQ=="],
+    "@opencode-ai/pty": ["@opencode-ai/pty@0.1.12", "", { "optionalDependencies": { "@opencode-ai/pty-darwin-arm64": "0.1.12", "@opencode-ai/pty-darwin-x64": "0.1.12", "@opencode-ai/pty-linux-arm64-gnu": "0.1.12", "@opencode-ai/pty-linux-arm64-musl": "0.1.12", "@opencode-ai/pty-linux-x64-gnu": "0.1.12", "@opencode-ai/pty-linux-x64-musl": "0.1.12" }, "bin": { "opencode-pty": "bin/opencode-pty.js" } }, "sha512-dl4FyJUhTXThsWYY8txG/8/nwN7dE0M5Sic9r4L9f2pvtJnbR5zrCrPoiPIBIxZle1wVks1dhz4z/CfqLf5sCg=="],
 
-    "@opencode-ai/pty-darwin-arm64": ["@opencode-ai/pty-darwin-arm64@0.1.10", "", { "os": "darwin", "cpu": "arm64" }, "sha512-j7aszDFRwCIazGUT9eIy4PZwh4rltjvRmoicPRTK3kONN3v0MMflstkmAFDYYpqDPTNh3qJ6xkQmB+DugEbhAg=="],
+    "@opencode-ai/pty-darwin-arm64": ["@opencode-ai/pty-darwin-arm64@0.1.12", "", { "os": "darwin", "cpu": "arm64" }, "sha512-tMvoriq3VegVlj1uEglc6qE0M7VXy61nyf9Si7tTO7xa8JiyxuFJSXOZ1pGeErDu+pe24hvTyVOR+gkdew8w9g=="],
 
-    "@opencode-ai/pty-darwin-x64": ["@opencode-ai/pty-darwin-x64@0.1.10", "", { "os": "darwin", "cpu": "x64" }, "sha512-UAMP/E4lo9RGQF7xrfIwpW2ZEemj308rCogJy14ruKYJt5MwHeGNTynGiHE/1JlDLRy+21wV50jpugADgT71ag=="],
+    "@opencode-ai/pty-darwin-x64": ["@opencode-ai/pty-darwin-x64@0.1.12", "", { "os": "darwin", "cpu": "x64" }, "sha512-Sn5vMLL5giHOhx7J5H6zwDp4YjjXorY+QV0IEYY+SCT4wQfRBliokIyj23pRl6P2RK3u9bDLXJHDNMfDVZ2Rxg=="],
 
-    "@opencode-ai/pty-linux-arm64-gnu": ["@opencode-ai/pty-linux-arm64-gnu@0.1.10", "", { "os": "linux", "cpu": "arm64" }, "sha512-lTPlZNQ66koFHZqoPmvvq0SetlepKVQYgnLryhlVfYtcryWDJM7gV4+P66V12RwqWQTjt2u8j12mtg3axSKg2w=="],
+    "@opencode-ai/pty-linux-arm64-gnu": ["@opencode-ai/pty-linux-arm64-gnu@0.1.12", "", { "os": "linux", "cpu": "arm64" }, "sha512-HbnlKZy052l7G527wK0+05EXaUpZ4ykVAmNBEzqWCoi4TeQj2+Nr9kJ9trx9o1KrVcT4Ki58CCvN5QOls6Z0yQ=="],
 
-    "@opencode-ai/pty-linux-arm64-musl": ["@opencode-ai/pty-linux-arm64-musl@0.1.10", "", { "os": "linux", "cpu": "arm64" }, "sha512-IDmWHRylMR/ZfMw9/AAktO/Edi4TITPC+Tq7Xx3JZHsDgSba3QdyE11uNL0zM1myTGdk6Yrt4rpdAzaItPnDjw=="],
+    "@opencode-ai/pty-linux-arm64-musl": ["@opencode-ai/pty-linux-arm64-musl@0.1.12", "", { "os": "linux", "cpu": "arm64" }, "sha512-2nTN7ggu1h9XgjNcoQMYjP5sirfYnAskpdFCOqjokLqhytX/IMMmkRTQs+foaEaPz0dAIQD3DQplR2jZIgxp1w=="],
 
-    "@opencode-ai/pty-linux-x64-gnu": ["@opencode-ai/pty-linux-x64-gnu@0.1.10", "", { "os": "linux", "cpu": "x64" }, "sha512-Q1yob0/8X2JoJZzFmNKUc32XDRAe0avKQ8PLKkpJr30qWXSrGmhltgcDmn94Q70zW9Ght9on84T7cmge9brvdQ=="],
+    "@opencode-ai/pty-linux-x64-gnu": ["@opencode-ai/pty-linux-x64-gnu@0.1.12", "", { "os": "linux", "cpu": "x64" }, "sha512-FnD5ndnObTQKAoaVvxLKi5W+r3/+dsaMsobz6uK0B9hlmffXxY5CQ6HQyUU/h3aIKLWXxho5XYkA2b9yrp8/gA=="],
 
-    "@opencode-ai/pty-linux-x64-musl": ["@opencode-ai/pty-linux-x64-musl@0.1.10", "", { "os": "linux", "cpu": "x64" }, "sha512-7RLHWQxX/wfUKJJP2ZMMtkXaPsrgoMNKzE6PL/LbnYbMBtkqfld9EDcMv1RFZ0CqjNFgI0Hg4eRk6x+ZNc/wyQ=="],
+    "@opencode-ai/pty-linux-x64-musl": ["@opencode-ai/pty-linux-x64-musl@0.1.12", "", { "os": "linux", "cpu": "x64" }, "sha512-prkrNu6uvjqoffxdGiDHSU5C0Y+kCSfv+lslu7dfRPgPKenVELNpRTAbOduyrWPac2vGt8j5NM61icJyodbJmA=="],
 
     "@opencode-ai/schema": ["@opencode-ai/schema@workspace:packages/schema"],
 

nix/hashes.json

@@ -1,8 +1,8 @@
 {
   "nodeModules": {
-    "x86_64-linux": "sha256-XHUy+Hk+RHUHREt4x0HfSzr3RlEvgBd4H/fV0rlXw2M=",
-    "aarch64-linux": "sha256-/gIaM62uV2X6KCnkSi6QjyT7t7uJ2L7u7CxXxPQYK+w=",
-    "aarch64-darwin": "sha256-PWG6ALh6kG7mnC6AzEuIAU54BEQ4IB+SyyQFGb/s+Dc=",
-    "x86_64-darwin": "sha256-TcgRDHG4CAT+XoCi0JNansONjg06ZPRmeLRsqmdJ4B4="
+    "x86_64-linux": "sha256-iYdVrLtyKmjlyypisF9SqzgyriWT90kSCh3crxw9AKU=",
+    "aarch64-linux": "sha256-BV2t4w5ujArbtSC/Qfm3gLzevQW9A6hMgOyPVp94g/o=",
+    "aarch64-darwin": "sha256-EwMq7zaxzzcsmH0Pjqu4ftGdcM8Lna8mvHgKzRcVI8g=",
+    "x86_64-darwin": "sha256-PokzxlkQy6JvHADF2ZMIIDI1u9ZjSNNedpmR9gvHS5c="
   }
 }

packages/ai/src/protocols/anthropic-messages.ts

@@ -406,6 +406,7 @@ const AnthropicEvent = Schema.Struct({
 type AnthropicEvent = Schema.Schema.Type<typeof AnthropicEvent>
 
 interface ParserState {
+  readonly providerMetadataKey: string
   readonly tools: ToolStream.State<number>
   readonly reasoningSignatures: Readonly<Record<number, string>>
   readonly usage?: Usage
@@ -440,18 +441,18 @@ const cacheControl = (breakpoints: Cache.Breakpoints, cache: CacheHint | undefin
   return Cache.ttlBucket(cache.ttlSeconds) === "1h" ? EPHEMERAL_1H : EPHEMERAL_5M
 }
 
-const anthropicMetadata = (metadata: Record<string, unknown>): ProviderMetadata => ({ anthropic: metadata })
+const providerMetadata = (key: string, metadata: Record<string, unknown>): ProviderMetadata => ({ [key]: metadata })
 
-const signatureFromMetadata = (metadata: ProviderMetadata | undefined): string | undefined => {
-  const anthropic = metadata?.anthropic
-  if (!ProviderShared.isRecord(anthropic)) return undefined
-  return typeof anthropic.signature === "string" ? anthropic.signature : undefined
+const signatureFromMetadata = (metadata: ProviderMetadata | undefined, key: string): string | undefined => {
+  const provider = metadata?.[key]
+  if (!ProviderShared.isRecord(provider)) return undefined
+  return typeof provider.signature === "string" ? provider.signature : undefined
 }
 
-const redactedDataFromMetadata = (metadata: ProviderMetadata | undefined): string | undefined => {
-  const anthropic = metadata?.anthropic
-  if (!ProviderShared.isRecord(anthropic)) return undefined
-  return typeof anthropic.redactedData === "string" ? anthropic.redactedData : undefined
+const redactedDataFromMetadata = (metadata: ProviderMetadata | undefined, key: string): string | undefined => {
+  const provider = metadata?.[key]
+  if (!ProviderShared.isRecord(provider)) return undefined
+  return typeof provider.redactedData === "string" ? provider.redactedData : undefined
 }
 
 const lowerTool = (breakpoints: Cache.Breakpoints, tool: ToolDefinition, inputSchema: JsonSchema): AnthropicTool => ({
@@ -511,13 +512,16 @@ const serverToolResultType = (name: string): AnthropicServerToolResultType | und
   return undefined
 }
 
-const lowerServerToolResult = Effect.fn("AnthropicMessages.lowerServerToolResult")(function* (part: ToolResultPart) {
+const lowerServerToolResult = Effect.fn("AnthropicMessages.lowerServerToolResult")(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}`)
   // Prefer the provider-owned replay payload; fall back to the result value for
   // histories constructed directly from provider events.
-  const payload = part.providerMetadata?.anthropic?.["result"] ?? part.result.value
+  const payload = part.providerMetadata?.[providerMetadataKey]?.["result"] ?? part.result.value
   return {
     type: wireType,
     tool_use_id: scrubToolCallID(part.id),
@@ -804,6 +808,7 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
   breakpoints: Cache.Breakpoints,
 ) {
   const messages: AnthropicMessage[] = []
+  const providerMetadataKey = request.model.route.providerMetadataKey ?? String(request.model.provider)
 
   for (const [index, message] of request.messages.entries()) {
     if (message.role === "system") {
@@ -849,8 +854,8 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
         if (part.type === "reasoning") {
           // A signature marks visible thinking; only signature-less parts carrying
           // redactedData round-trip as opaque redacted_thinking blocks.
-          const signature = part.encrypted ?? signatureFromMetadata(part.providerMetadata)
-          const redactedData = redactedDataFromMetadata(part.providerMetadata)
+          const signature = part.encrypted ?? signatureFromMetadata(part.providerMetadata, providerMetadataKey)
+          const redactedData = redactedDataFromMetadata(part.providerMetadata, providerMetadataKey)
           if (signature === undefined && redactedData !== undefined) {
             content.push({ type: "redacted_thinking", data: redactedData })
             continue
@@ -879,7 +884,7 @@ const lowerMessages = Effect.fn("AnthropicMessages.lowerMessages")(function* (
           continue
         }
         if (part.type === "tool-result" && part.providerExecuted) {
-          content.push(yield* lowerServerToolResult(part))
+          content.push(yield* lowerServerToolResult(part, providerMetadataKey))
           continue
         }
         return yield* invalid(
@@ -1069,7 +1074,7 @@ const mapFinishReason = (reason: string | null | undefined): FinishReason => {
 // inclusive `inputTokens` the rest of the contract expects. Extended
 // thinking tokens are included in `output_tokens`; newer responses also
 // expose that subset through `output_tokens_details.thinking_tokens`.
-const mapUsage = (usage: AnthropicUsage | undefined): Usage | undefined => {
+const mapUsage = (usage: AnthropicUsage | undefined, providerMetadataKey: string): Usage | undefined => {
   if (!usage) return undefined
   const nonCached = usage.input_tokens ?? undefined
   const cacheRead = usage.cache_read_input_tokens ?? undefined
@@ -1083,7 +1088,7 @@ const mapUsage = (usage: AnthropicUsage | undefined): Usage | undefined => {
     cacheWriteInputTokens: cacheWrite,
     reasoningTokens: usage.output_tokens_details?.thinking_tokens,
     totalTokens: ProviderShared.totalTokens(inputTokens, usage.output_tokens, undefined),
-    providerMetadata: { anthropic: usage },
+    providerMetadata: { [providerMetadataKey]: usage },
   })
 }
 
@@ -1092,7 +1097,7 @@ const mapUsage = (usage: AnthropicUsage | undefined): Usage | undefined => {
 // field prefers `right` when defined, falls back to `left`. `inputTokens` is
 // recomputed from the merged breakdown so the inclusive total stays
 // consistent with `nonCached + cacheRead + cacheWrite`.
-const mergeUsage = (left: Usage | undefined, right: Usage | undefined) => {
+const mergeUsage = (left: Usage | undefined, right: Usage | undefined, providerMetadataKey: string) => {
   if (!left) return right
   if (!right) return left
   const nonCachedInputTokens = right.nonCachedInputTokens ?? left.nonCachedInputTokens
@@ -1110,7 +1115,9 @@ const mergeUsage = (left: Usage | undefined, right: Usage | undefined) => {
     reasoningTokens,
     totalTokens: ProviderShared.totalTokens(inputTokens, outputTokens, undefined),
     providerMetadata: {
-      anthropic: mergeJsonRecords(left.providerMetadata?.["anthropic"], right.providerMetadata?.["anthropic"]) ?? {},
+      [providerMetadataKey]:
+        mergeJsonRecords(left.providerMetadata?.[providerMetadataKey], right.providerMetadata?.[providerMetadataKey]) ??
+        {},
     },
   })
 }
@@ -1128,7 +1135,7 @@ const SERVER_TOOL_RESULT_NAMES: Record<AnthropicServerToolResultType, string> =
 
 const isServerToolResultType = (type: string): type is AnthropicServerToolResultType => type in SERVER_TOOL_RESULT_NAMES
 
-const serverToolResultEvent = (block: AnthropicStreamBlock): LLMEvent | undefined => {
+const serverToolResultEvent = (block: AnthropicStreamBlock, providerMetadataKey: string): LLMEvent | undefined => {
   if (!block.type || !isServerToolResultType(block.type)) return undefined
   const errorPayload =
     typeof block.content === "object" && block.content !== null && "type" in block.content
@@ -1142,7 +1149,7 @@ const serverToolResultEvent = (block: AnthropicStreamBlock): LLMEvent | undefine
     providerExecuted: true,
     // The complete payload is irreducible provider replay state: subsequent
     // stateless requests must round-trip the typed result block verbatim.
-    providerMetadata: anthropicMetadata({ blockType: block.type, result: block.content }),
+    providerMetadata: providerMetadata(providerMetadataKey, { blockType: block.type, result: block.content }),
   })
 }
 
@@ -1151,8 +1158,8 @@ type StepResult = readonly [ParserState, ReadonlyArray<LLMEvent>]
 const NO_EVENTS: StepResult["1"] = []
 
 const onMessageStart = (state: ParserState, event: AnthropicEvent): StepResult => {
-  const usage = mapUsage(event.message?.usage)
-  return [usage ? { ...state, usage: mergeUsage(state.usage, usage) } : state, NO_EVENTS]
+  const usage = mapUsage(event.message?.usage, state.providerMetadataKey)
+  return [usage ? { ...state, usage: mergeUsage(state.usage, usage, state.providerMetadataKey) } : state, NO_EVENTS]
 }
 
 const onContentBlockStart = (
@@ -1204,14 +1211,16 @@ const onContentBlockStart = (
   if (block.type === "thinking" && block.thinking !== undefined) {
     const events: LLMEvent[] = []
     const id = `reasoning-${event.index ?? 0}`
-    const providerMetadata =
-      block.signature === undefined ? undefined : anthropicMetadata({ signature: block.signature })
-    const lifecycle = Lifecycle.reasoningStart(state.lifecycle, events, id, providerMetadata)
+    const metadata =
+      block.signature === undefined
+        ? undefined
+        : providerMetadata(state.providerMetadataKey, { signature: block.signature })
+    const lifecycle = Lifecycle.reasoningStart(state.lifecycle, events, id, metadata)
     return [
       {
         ...state,
         lifecycle: block.thinking
-          ? Lifecycle.reasoningDelta(lifecycle, events, id, block.thinking, providerMetadata)
+          ? Lifecycle.reasoningDelta(lifecycle, events, id, block.thinking, metadata)
           : lifecycle,
         reasoningSignatures:
           event.index === undefined || block.signature === undefined
@@ -1234,14 +1243,14 @@ const onContentBlockStart = (
           state.lifecycle,
           events,
           `reasoning-${event.index ?? 0}`,
-          anthropicMetadata({ redactedData: block.data }),
+          providerMetadata(state.providerMetadataKey, { redactedData: block.data }),
         ),
       },
       events,
     ]
   }
 
-  const result = serverToolResultEvent(block)
+  const result = serverToolResultEvent(block, state.providerMetadataKey)
   if (!result) return [state, NO_EVENTS]
   const events: LLMEvent[] = []
   return [{ ...state, lifecycle: Lifecycle.stepStart(state.lifecycle, events) }, [...events, result]]
@@ -1321,7 +1330,7 @@ const onContentBlockStop = Effect.fn("AnthropicMessages.onContentBlockStop")(fun
         Lifecycle.textEnd(state.lifecycle, events, `text-${event.index}`),
         events,
         `reasoning-${event.index}`,
-        signature === undefined ? undefined : anthropicMetadata({ signature }),
+        signature === undefined ? undefined : providerMetadata(state.providerMetadataKey, { signature }),
       )
   events.push(...resultEvents)
   const reasoningSignatures = { ...state.reasoningSignatures }
@@ -1333,7 +1342,7 @@ const onMessageDelta = (
   state: ParserState,
   event: AnthropicEvent & { readonly delta?: AnthropicStreamDelta },
 ): StepResult => {
-  const usage = mergeUsage(state.usage, mapUsage(event.usage))
+  const usage = mergeUsage(state.usage, mapUsage(event.usage, state.providerMetadataKey), state.providerMetadataKey)
   return [
     {
       ...state,
@@ -1346,7 +1355,7 @@ const onMessageDelta = (
         providerMetadata:
           event.delta?.stop_sequence === null || event.delta?.stop_sequence === undefined
             ? undefined
-            : anthropicMetadata({ stopSequence: event.delta.stop_sequence }),
+            : providerMetadata(state.providerMetadataKey, { stopSequence: event.delta.stop_sequence }),
       },
     },
     NO_EVENTS,
@@ -1472,7 +1481,8 @@ export const protocol = Protocol.make({
   },
   stream: {
     event: Protocol.jsonEvent(AnthropicEvent),
-    initial: () => ({
+    initial: (request) => ({
+      providerMetadataKey: request.model.route.providerMetadataKey ?? String(request.model.provider),
       tools: ToolStream.empty<number>(),
       reasoningSignatures: {},
       lifecycle: Lifecycle.initial(),

packages/ai/src/protocols/bedrock-converse.ts

@@ -258,19 +258,21 @@ const lowerToolChoice = (toolChoice: NonNullable<LLMRequest["toolChoice"]>) =>
     tool: (name) => ({ tool: { name } }) as const,
   })
 
-const bedrockMetadata = (metadata: Record<string, unknown>): ProviderMetadata => ({ bedrock: metadata })
+const providerMetadata = (key: string, metadata: Record<string, unknown>): ProviderMetadata => ({ [key]: metadata })
 
-const reasoningSignature = (part: ReasoningPart) => {
-  const bedrock = part.providerMetadata?.bedrock
+const reasoningSignature = (part: ReasoningPart, providerMetadataKey: string) => {
+  const metadata = part.providerMetadata?.[providerMetadataKey]
   return (
     part.encrypted ??
-    (ProviderShared.isRecord(bedrock) && typeof bedrock.signature === "string" ? bedrock.signature : undefined)
+    (ProviderShared.isRecord(metadata) && typeof metadata.signature === "string" ? metadata.signature : undefined)
   )
 }
 
-const reasoningRedactedData = (part: ReasoningPart) => {
-  const bedrock = part.providerMetadata?.bedrock
-  return ProviderShared.isRecord(bedrock) && typeof bedrock.redactedData === "string" ? bedrock.redactedData : undefined
+const reasoningRedactedData = (part: ReasoningPart, providerMetadataKey: string) => {
+  const metadata = part.providerMetadata?.[providerMetadataKey]
+  return ProviderShared.isRecord(metadata) && typeof metadata.redactedData === "string"
+    ? metadata.redactedData
+    : undefined
 }
 
 const lowerToolCall = (part: ToolCallPart): BedrockToolUseBlock => ({
@@ -318,6 +320,7 @@ const lowerMessages = Effect.fn("BedrockConverse.lowerMessages")(function* (
   breakpoints: BedrockCache.Breakpoints,
 ) {
   const messages: BedrockMessage[] = []
+  const providerMetadataKey = request.model.route.providerMetadataKey ?? String(request.model.provider)
 
   for (const message of request.messages) {
     if (message.role === "system") {
@@ -365,8 +368,8 @@ const lowerMessages = Effect.fn("BedrockConverse.lowerMessages")(function* (
           continue
         }
         if (part.type === "reasoning") {
-          const signature = reasoningSignature(part)
-          const redactedData = reasoningRedactedData(part)
+          const signature = reasoningSignature(part, providerMetadataKey)
+          const redactedData = reasoningRedactedData(part, providerMetadataKey)
           if (signature === undefined && redactedData !== undefined) {
             content.push({ reasoningContent: { redactedContent: redactedData } })
             continue
@@ -466,7 +469,7 @@ const mapFinishReason = (reason: string): FinishReason => {
 
 // AWS reports inputTokens separately from cache reads and writes.
 // Bedrock does not break reasoning out of outputTokens for current models.
-const mapUsage = (usage: BedrockUsageSchema | undefined): Usage | undefined => {
+const mapUsage = (usage: BedrockUsageSchema | undefined, providerMetadataKey: string): Usage | undefined => {
   if (!usage) return undefined
   const inputTokens = ProviderShared.sumTokens(
     usage.inputTokens,
@@ -480,11 +483,12 @@ const mapUsage = (usage: BedrockUsageSchema | undefined): Usage | undefined => {
     cacheReadInputTokens: usage.cacheReadInputTokens,
     cacheWriteInputTokens: usage.cacheWriteInputTokens,
     totalTokens: ProviderShared.totalTokens(inputTokens, usage.outputTokens, usage.totalTokens),
-    providerMetadata: { bedrock: usage },
+    providerMetadata: { [providerMetadataKey]: usage },
   })
 }
 
 interface ParserState {
+  readonly providerMetadataKey: string
   readonly tools: ToolStream.State<number>
   // Bedrock splits the finish into `messageStop` (carries `stopReason`) and
   // `metadata` (carries usage). Hold the terminal event in state so `onHalt`
@@ -541,20 +545,14 @@ const step = (state: ParserState, event: BedrockEvent) =>
       const reasoning = event.contentBlockDelta.delta.reasoningContent
       const events: LLMEvent[] = []
       const redactedData = reasoning.redactedContent ?? reasoning.data
-      const providerMetadata = reasoning.signature
-        ? bedrockMetadata({ signature: reasoning.signature })
+      const metadata = reasoning.signature
+        ? providerMetadata(state.providerMetadataKey, { signature: reasoning.signature })
         : redactedData !== undefined
-          ? bedrockMetadata({ redactedData })
+          ? providerMetadata(state.providerMetadataKey, { redactedData })
           : undefined
       const lifecycle =
-        reasoning.text !== undefined || providerMetadata !== undefined
-          ? Lifecycle.reasoningDelta(
-              state.lifecycle,
-              events,
-              `reasoning-${index}`,
-              reasoning.text ?? "",
-              providerMetadata,
-            )
+        reasoning.text !== undefined || metadata !== undefined
+          ? Lifecycle.reasoningDelta(state.lifecycle, events, `reasoning-${index}`, reasoning.text ?? "", metadata)
           : state.lifecycle
       return [
         {
@@ -596,7 +594,7 @@ const step = (state: ParserState, event: BedrockEvent) =>
             events,
             `reasoning-${index}`,
             state.reasoningSignatures[index]
-              ? bedrockMetadata({ signature: state.reasoningSignatures[index] })
+              ? providerMetadata(state.providerMetadataKey, { signature: state.reasoningSignatures[index] })
               : undefined,
           )
       events.push(...resultEvents)
@@ -633,7 +631,7 @@ const step = (state: ParserState, event: BedrockEvent) =>
     }
 
     if (event.metadata) {
-      const usage = mapUsage(event.metadata.usage) ?? state.pendingFinish?.usage
+      const usage = mapUsage(event.metadata.usage, state.providerMetadataKey) ?? state.pendingFinish?.usage
       return [
         {
           ...state,
@@ -698,7 +696,8 @@ export const protocol = Protocol.make({
   },
   stream: {
     event: BedrockEvent,
-    initial: () => ({
+    initial: (request) => ({
+      providerMetadataKey: request.model.route.providerMetadataKey ?? String(request.model.provider),
       tools: ToolStream.empty<number>(),
       pendingFinish: undefined,
       hasToolCalls: false,

packages/ai/src/protocols/gemini.ts

@@ -229,6 +229,7 @@ type GeminiEvent = Schema.Schema.Type<typeof GeminiEvent>
 
 interface ParserState {
   readonly route: string
+  readonly providerMetadataKey: string
   readonly finishReason?: string
   readonly hasToolCalls: boolean
   readonly promptFeedback?: GeminiPromptFeedback
@@ -285,22 +286,23 @@ const lowerUserPart = Effect.fn("Gemini.lowerUserPart")(function* (part: TextPar
   return { inlineData: { mimeType: media.mime, data: media.base64 } }
 })
 
-const googleMetadata = (metadata: Record<string, unknown>): ProviderMetadata => ({ google: metadata })
+const providerMetadata = (key: string, metadata: Record<string, unknown>): ProviderMetadata => ({ [key]: metadata })
 
-const thoughtSignature = (providerMetadata: ProviderMetadata | undefined) => {
-  const google = providerMetadata?.google
-  return ProviderShared.isRecord(google) && typeof google.thoughtSignature === "string"
-    ? google.thoughtSignature
+const thoughtSignature = (metadata: ProviderMetadata | undefined, key: string) => {
+  const value = metadata?.[key]
+  return ProviderShared.isRecord(value) && typeof value.thoughtSignature === "string"
+    ? value.thoughtSignature
     : undefined
 }
 
-const lowerToolCall = (part: ToolCallPart, omitIds: boolean) => ({
+const lowerToolCall = (part: ToolCallPart, omitIds: boolean, metadataKey: string) => ({
   functionCall: { ...(omitIds ? {} : { id: part.id }), name: part.name, args: part.input },
-  thoughtSignature: thoughtSignature(part.providerMetadata),
+  thoughtSignature: thoughtSignature(part.providerMetadata, metadataKey),
 })
 
 const lowerMessages = Effect.fn("Gemini.lowerMessages")(function* (request: LLMRequest) {
   const contents: GeminiContent[] = []
+  const metadataKey = request.model.route.providerMetadataKey ?? String(request.model.provider)
   const omitCallIds = omitsFunctionCallIds(request.model.id)
   const legacyToolMedia = routesLegacyToolMedia(request.model.id)
   let pendingMedia: GeminiInlineDataPart[] | undefined
@@ -342,15 +344,19 @@ const lowerMessages = Effect.fn("Gemini.lowerMessages")(function* (request: LLMR
         if (!ProviderShared.supportsContent(part, ["text", "reasoning", "tool-call"]))
           return yield* ProviderShared.unsupportedContent("Gemini", "assistant", ["text", "reasoning", "tool-call"])
         if (part.type === "text") {
-          parts.push({ text: part.text, thoughtSignature: thoughtSignature(part.providerMetadata) })
+          parts.push({ text: part.text, thoughtSignature: thoughtSignature(part.providerMetadata, metadataKey) })
           continue
         }
         if (part.type === "reasoning") {
-          parts.push({ text: part.text, thought: true, thoughtSignature: thoughtSignature(part.providerMetadata) })
+          parts.push({
+            text: part.text,
+            thought: true,
+            thoughtSignature: thoughtSignature(part.providerMetadata, metadataKey),
+          })
           continue
         }
         if (part.type === "tool-call") {
-          const lowered = lowerToolCall(part, omitCallIds)
+          const lowered = lowerToolCall(part, omitCallIds, metadataKey)
           const signature = lowered.thoughtSignature
           parts.push({
             ...lowered,
@@ -498,7 +504,7 @@ const fromRequest = Effect.fn("Gemini.fromRequest")(function* (request: LLMReque
 // `cachedContentTokenCount` subset. `candidatesTokenCount` is *exclusive*
 // of `thoughtsTokenCount` — visible-only, not a total — so we sum the two
 // to produce the inclusive `outputTokens` the rest of the contract expects.
-const mapUsage = (usage: GeminiUsage | undefined) => {
+const mapUsage = (usage: GeminiUsage | undefined, metadataKey: string) => {
   if (!usage) return undefined
   // Explicit provider nulls decode as `null`; normalize to `undefined` so the
   // token arithmetic below treats them like absent counts.
@@ -519,7 +525,7 @@ const mapUsage = (usage: GeminiUsage | undefined) => {
     cacheReadInputTokens: cached,
     reasoningTokens: thoughts,
     totalTokens: ProviderShared.totalTokens(promptTokens, outputTokens, usage.totalTokenCount ?? undefined),
-    providerMetadata: { google: usage },
+    providerMetadata: providerMetadata(metadataKey, usage),
   })
 }
 
@@ -567,14 +573,14 @@ const finish = (state: ParserState): ReadonlyArray<LLMEvent> => {
       lifecycle,
       events,
       "reasoning-0",
-      googleMetadata({ thoughtSignature: state.reasoningSignature }),
+      providerMetadata(state.providerMetadataKey, { thoughtSignature: state.reasoningSignature }),
     )
   if (state.textSignature !== undefined)
     lifecycle = Lifecycle.textEnd(
       lifecycle,
       events,
       "text-0",
-      googleMetadata({ thoughtSignature: state.textSignature }),
+      providerMetadata(state.providerMetadataKey, { thoughtSignature: state.textSignature }),
     )
   Lifecycle.finish(lifecycle, events, {
     reason: {
@@ -584,7 +590,9 @@ const finish = (state: ParserState): ReadonlyArray<LLMEvent> => {
     },
     usage: state.usage,
     providerMetadata:
-      state.promptFeedback === undefined ? undefined : googleMetadata({ promptFeedback: state.promptFeedback }),
+      state.promptFeedback === undefined
+        ? undefined
+        : providerMetadata(state.providerMetadataKey, { promptFeedback: state.promptFeedback }),
   })
   return events
 }
@@ -593,7 +601,9 @@ const step = (state: ParserState, event: GeminiEvent) => {
   const nextState = {
     ...state,
     promptFeedback: event.promptFeedback ?? state.promptFeedback,
-    usage: event.usageMetadata ? (mapUsage(event.usageMetadata) ?? state.usage) : state.usage,
+    usage: event.usageMetadata
+      ? (mapUsage(event.usageMetadata, state.providerMetadataKey) ?? state.usage)
+      : state.usage,
   }
   const candidate = event.candidates?.[0]
   if (!candidate?.content)
@@ -637,7 +647,7 @@ const step = (state: ParserState, event: GeminiEvent) => {
           events,
           "reasoning-0",
           part.text,
-          signature ? googleMetadata({ thoughtSignature: signature }) : undefined,
+          signature ? providerMetadata(state.providerMetadataKey, { thoughtSignature: signature }) : undefined,
         )
         continue
       }
@@ -645,14 +655,16 @@ const step = (state: ParserState, event: GeminiEvent) => {
         lifecycle,
         events,
         "reasoning-0",
-        reasoningSignature ? googleMetadata({ thoughtSignature: reasoningSignature }) : undefined,
+        reasoningSignature
+          ? providerMetadata(state.providerMetadataKey, { thoughtSignature: reasoningSignature })
+          : undefined,
       )
       lifecycle = Lifecycle.textDelta(
         lifecycle,
         events,
         "text-0",
         part.text,
-        textSignature ? googleMetadata({ thoughtSignature: textSignature }) : undefined,
+        textSignature ? providerMetadata(state.providerMetadataKey, { thoughtSignature: textSignature }) : undefined,
       )
       textSignature = undefined
       continue
@@ -672,7 +684,9 @@ const step = (state: ParserState, event: GeminiEvent) => {
         lifecycle,
         events,
         "reasoning-0",
-        reasoningSignature ? googleMetadata({ thoughtSignature: reasoningSignature }) : undefined,
+        reasoningSignature
+          ? providerMetadata(state.providerMetadataKey, { thoughtSignature: reasoningSignature })
+          : undefined,
       )
       lifecycle = Lifecycle.stepStart(lifecycle, events)
       events.push(
@@ -681,7 +695,7 @@ const step = (state: ParserState, event: GeminiEvent) => {
           name: part.functionCall.name,
           input,
           providerMetadata: part.thoughtSignature
-            ? googleMetadata({ thoughtSignature: part.thoughtSignature })
+            ? providerMetadata(state.providerMetadataKey, { thoughtSignature: part.thoughtSignature })
             : undefined,
         }),
       )
@@ -720,6 +734,7 @@ export const protocol = Protocol.make({
     event: Protocol.jsonEvent(GeminiEvent),
     initial: (request) => ({
       route: `${request.model.provider}/${request.model.route.id}`,
+      providerMetadataKey: request.model.route.providerMetadataKey ?? String(request.model.provider),
       hasToolCalls: false,
       lifecycle: Lifecycle.initial(),
     }),

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

@@ -253,6 +253,7 @@ interface PendingToolDelta {
 }
 
 export interface ParserState {
+  readonly providerMetadataKey: string
   readonly tools: ToolStream.State<number>
   readonly pendingTools: Partial<Record<number, PendingToolDelta>>
   readonly toolCallEvents: ReadonlyArray<LLMEvent>
@@ -324,17 +325,18 @@ const lowerMedia = Effect.fn("OpenAIChat.lowerMedia")(function* (part: MediaPart
 const openAICompatibleReasoningContent = (native: unknown) =>
   isRecord(native) && typeof native.reasoning_content === "string" ? native.reasoning_content : undefined
 
-const reasoningField = (part: ReasoningPart) => {
-  const field = part.providerMetadata?.openai?.reasoningField
+const reasoningField = (part: ReasoningPart, providerMetadataKey: string) => {
+  const field = part.providerMetadata?.[providerMetadataKey]?.reasoningField
   return typeof field === "string" ? field : undefined
 }
 
-const reasoningDetails = (parts: ReadonlyArray<ReasoningPart>, native: unknown) => {
+const reasoningDetails = (parts: ReadonlyArray<ReasoningPart>, native: unknown, providerMetadataKey: string) => {
   const observed = parts.flatMap((part) => {
-    const details = part.providerMetadata?.openai?.reasoningDetails
+    const details = part.providerMetadata?.[providerMetadataKey]?.reasoningDetails
     return Array.isArray(details) ? details : []
   })
-  if (parts.some((part) => Array.isArray(part.providerMetadata?.openai?.reasoningDetails))) return observed
+  if (parts.some((part) => Array.isArray(part.providerMetadata?.[providerMetadataKey]?.reasoningDetails)))
+    return observed
   if (isRecord(native) && Array.isArray(native.reasoning_details)) return native.reasoning_details
 }
 
@@ -366,7 +368,7 @@ const lowerAssistantMessage = Effect.fn("OpenAIChat.lowerAssistantMessage")(func
   message: OpenAIChatRequestMessage,
   configuredField: string | undefined,
   requireReasoning: boolean,
-  options: LoweringOptions,
+  options: LoweringOptions & { readonly providerMetadataKey: string },
 ) {
   const content: TextPart[] = []
   const reasoning: ReasoningPart[] = []
@@ -388,10 +390,14 @@ const lowerAssistantMessage = Effect.fn("OpenAIChat.lowerAssistantMessage")(func
     }
   }
   const text = reasoning.map((part) => part.text).join("")
-  const details = reasoningDetails(reasoning, message.native?.openaiCompatible)
-  const observedField = reasoning.map(reasoningField).find((value) => value !== undefined)
+  const details = reasoningDetails(reasoning, message.native?.openaiCompatible, options.providerMetadataKey)
+  const observedField = reasoning
+    .map((part) => reasoningField(part, options.providerMetadataKey))
+    .find((value) => value !== undefined)
   const nativeReasoning = openAICompatibleReasoningContent(message.native?.openaiCompatible)
-  const fullyStructured = reasoning.every((part) => Array.isArray(part.providerMetadata?.openai?.reasoningDetails))
+  const fullyStructured = reasoning.every((part) =>
+    Array.isArray(part.providerMetadata?.[options.providerMetadataKey]?.reasoningDetails),
+  )
   const field = (() => {
     if (configuredField !== undefined && (requireReasoning || reasoning.length > 0 || nativeReasoning !== undefined))
       return configuredField
@@ -459,7 +465,7 @@ const lowerMessage = Effect.fn("OpenAIChat.lowerMessage")(function* (
   message: OpenAIChatRequestMessage,
   reasoningField: string | undefined,
   requireReasoning: boolean,
-  options: LoweringOptions,
+  options: LoweringOptions & { readonly providerMetadataKey: string },
 ) {
   if (message.role === "user") return [yield* lowerUserMessage(message, options)]
   if (message.role === "assistant")
@@ -495,6 +501,7 @@ const lowerMessages = Effect.fn("OpenAIChat.lowerMessages")(function* (request:
   const mistral = ["mistral", "devstral", "codestral", "pixtral", "mixtral"].some((family) => modelID.includes(family))
   const lowering = {
     ...options,
+    providerMetadataKey: request.model.route.providerMetadataKey ?? String(request.model.provider),
     toolCallID: (id: string) => {
       if (mistral)
         return id
@@ -820,7 +827,7 @@ const mapFinishReason = Effect.fn("OpenAIChat.mapFinishReason")(function* (event
 // Providers differ on cache-hit location: OpenAI uses
 // `prompt_tokens_details.cached_tokens`, DeepSeek uses
 // `prompt_cache_hit_tokens`, and Zai uses top-level `cached_tokens`.
-const mapUsage = (usage: OpenAIChatEvent["usage"]): Usage | undefined => {
+const mapUsage = (usage: OpenAIChatEvent["usage"], providerMetadataKey: string): Usage | undefined => {
   if (!usage) return undefined
   const input = usage.prompt_tokens ?? undefined
   const output = usage.completion_tokens ?? undefined
@@ -839,7 +846,7 @@ const mapUsage = (usage: OpenAIChatEvent["usage"]): Usage | undefined => {
     cacheWriteInputTokens: cacheWrite,
     reasoningTokens: reasoning,
     totalTokens: ProviderShared.totalTokens(input, output, usage.total_tokens ?? undefined),
-    providerMetadata: { openai: usage },
+    providerMetadata: { [providerMetadataKey]: usage },
   })
 }
 
@@ -913,8 +920,12 @@ const conflictingReasoningTextDetails = (previous: Record<string, unknown>, curr
 const conflictingDetailValue = (previous: unknown, current: unknown) =>
   previous !== undefined && previous !== null && current !== undefined && current !== null && previous !== current
 
-const reasoningMetadata = (field: ParserState["reasoningField"], details?: ReadonlyArray<unknown>) => ({
-  openai: {
+const reasoningMetadata = (
+  providerMetadataKey: string,
+  field: ParserState["reasoningField"],
+  details?: ReadonlyArray<unknown>,
+) => ({
+  [providerMetadataKey]: {
     ...(field ? { reasoningField: field } : {}),
     ...(details ? { reasoningDetails: details } : {}),
   },
@@ -941,7 +952,10 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
     // Moonshot (and a few other OpenAI-compatible providers) attach usage to
     // `choice.usage` instead of the top-level `usage` field.
     const choiceUsage = (choice as unknown as { usage?: OpenAIChatEvent["usage"] })?.usage
-    const usage = mapUsage(event.usage) ?? (choiceUsage ? mapUsage(choiceUsage) : undefined) ?? state.usage
+    const usage =
+      mapUsage(event.usage, state.providerMetadataKey) ??
+      (choiceUsage ? mapUsage(choiceUsage, state.providerMetadataKey) : undefined) ??
+      state.usage
     const rawFinishReason = choice?.finish_reason
     const finishReason = rawFinishReason
       ? {
@@ -979,7 +993,7 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
     const detailDelta = Array.isArray(delta?.reasoning_details) ? delta.reasoning_details : undefined
     if (detailDelta !== undefined) appendReasoningDetails(state.reasoningDetails, detailDelta)
     const reasoningDetailsObserved = state.reasoningDetailsObserved || detailDelta !== undefined
-    const deltaMetadata = reasoningMetadata(reasoningField)
+    const deltaMetadata = reasoningMetadata(state.providerMetadataKey, reasoningField)
     const text = detailDelta?.length ? (detailText(detailDelta) ?? reasoning?.text) : reasoning?.text
     if (text !== undefined) lifecycle = Lifecycle.reasoningDelta(lifecycle, events, "reasoning-0", text, deltaMetadata)
     else if (
@@ -995,7 +1009,11 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
         lifecycle,
         events,
         "reasoning-0",
-        reasoningMetadata(reasoningField, reasoningDetailsObserved ? state.reasoningDetails : undefined),
+        reasoningMetadata(
+          state.providerMetadataKey,
+          reasoningField,
+          reasoningDetailsObserved ? state.reasoningDetails : undefined,
+        ),
       )
       lifecycle = Lifecycle.textDelta(lifecycle, events, "text-0", delta.content)
     }
@@ -1005,7 +1023,11 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
         lifecycle,
         events,
         "reasoning-0",
-        reasoningMetadata(reasoningField, reasoningDetailsObserved ? state.reasoningDetails : undefined),
+        reasoningMetadata(
+          state.providerMetadataKey,
+          reasoningField,
+          reasoningDetailsObserved ? state.reasoningDetails : undefined,
+        ),
       )
       lifecycle = Lifecycle.textDelta(lifecycle, events, "text-0", delta.refusal)
     }
@@ -1066,6 +1088,7 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
 
     return [
       {
+        providerMetadataKey: state.providerMetadataKey,
         tools: finished?.tools ?? tools,
         pendingTools,
         toolCallEvents: finished?.events ?? state.toolCallEvents,
@@ -1109,12 +1132,18 @@ const finishEvents = Effect.fn("OpenAIChat.finishEvents")(function* (state: Pars
       }
     : { normalized: hasToolCalls ? ("tool-calls" as const) : ("stop" as const) }
   const metadata = reasoningMetadata(
+    state.providerMetadataKey,
     state.reasoningField,
     state.reasoningDetailsObserved ? state.reasoningDetails : undefined,
   )
   const started =
     state.reasoningDetailsObserved && !state.reasoningEmitted
-      ? Lifecycle.reasoningStart(state.lifecycle, events, "reasoning-0", reasoningMetadata(state.reasoningField))
+      ? Lifecycle.reasoningStart(
+          state.lifecycle,
+          events,
+          "reasoning-0",
+          reasoningMetadata(state.providerMetadataKey, state.reasoningField),
+        )
       : state.lifecycle
   const ended = Lifecycle.reasoningEnd(started, events, "reasoning-0", metadata)
   const lifecycle = toolCallEvents.length ? Lifecycle.stepStart(ended, events) : ended
@@ -1141,6 +1170,7 @@ export const protocol = Protocol.make({
   stream: {
     event: Protocol.jsonEvent(OpenAIChatEvent),
     initial: (request) => ({
+      providerMetadataKey: request.model.route.providerMetadataKey ?? String(request.model.provider),
       tools: ToolStream.empty<number>(),
       pendingTools: {},
       toolCallEvents: [],

packages/ai/src/providers/amazon-bedrock-mantle.ts

@@ -23,13 +23,14 @@ export interface Settings extends ProviderPackage.Settings {
   readonly baseURL?: string
   readonly credentials?: Credentials
   readonly region?: string
+  readonly topP?: number
   readonly providerOptions?: OpenAIProviderOptionsInput
 }
 
 const responsesRoute = Route.make({
   id: "bedrock-mantle-responses",
   provider: id,
-  providerMetadataKey: OpenAIResponses.route.providerMetadataKey,
+  providerMetadataKey: "mantle",
   protocol: OpenAIResponses.protocol,
   endpoint: OpenAIResponses.route.endpoint,
   auth: OpenAIResponses.route.auth,
@@ -40,6 +41,7 @@ const responsesRoute = Route.make({
 const chatRoute = OpenAIChat.route.with({
   id: "bedrock-mantle-chat",
   provider: id,
+  providerMetadataKey: "mantle",
 })
 
 export const routes = [responsesRoute, chatRoute]
@@ -76,7 +78,7 @@ export const configure = (input: Config = {}) => {
 
   return {
     id,
-    model: chat,
+    model: responses,
     chat,
     responses,
     configure,
@@ -94,6 +96,7 @@ const config = (settings: Settings): Config => {
     apiKey: settings.auth === "sigv4" ? undefined : settings.apiKey,
     baseURL: settings.baseURL,
     credentials: settings.credentials,
+    generation: settings.topP === undefined ? undefined : { topP: settings.topP },
     headers: settings.headers === undefined ? undefined : { ...settings.headers },
     http: settings.body === undefined ? undefined : { body: { ...settings.body } },
     providerOptions: settings.providerOptions,
@@ -109,4 +112,4 @@ export const responsesModel: ProviderPackage.Definition<Settings, OpenAIProvider
   modelID,
   settings,
 ) => configure(config(settings)).responses(modelID)
-export const model = chatModel
+export const model = responsesModel

packages/ai/src/providers/amazon-bedrock.ts

@@ -35,6 +35,7 @@ const configuredRoute = (input: Config) => {
   return BedrockConverse.route.with({
     ...rest,
     provider: id,
+    providerMetadataKey: "bedrock",
     endpoint: { baseURL: baseURL ?? bedrockBaseURL(resolvedRegion) },
     auth: apiKey === undefined ? BedrockConverse.sigV4Auth(credentials) : Auth.bearer(apiKey),
   })

packages/ai/src/providers/amazon-bedrock/mantle.ts

@@ -1,2 +1,2 @@
-export { chatModel as model } from "../amazon-bedrock-mantle.js"
+export { responsesModel as model } from "../amazon-bedrock-mantle.js"
 export type { Settings } from "../amazon-bedrock-mantle.js"

packages/ai/src/providers/google-vertex-chat.ts

@@ -27,6 +27,7 @@ export interface Settings extends ProviderPackage.Settings {
 const route = OpenAICompatibleChat.route.with({
   id: "google-vertex-chat",
   provider: id,
+  providerMetadataKey: "vertex",
 })
 
 export const routes = [route]

packages/ai/src/providers/google-vertex-responses.ts

@@ -27,6 +27,7 @@ export interface Settings extends ProviderPackage.Settings {
 const route = OpenAICompatibleResponses.route.with({
   id: "google-vertex-responses",
   provider: id,
+  providerMetadataKey: "vertex",
   providerOptions: { store: false },
 })
 

packages/ai/src/providers/google-vertex.ts

@@ -68,7 +68,7 @@ const protocol = {
 const route = Route.make({
   id: "google-vertex-gemini",
   provider: id,
-  providerMetadataKey: "google",
+  providerMetadataKey: "vertex",
   protocol,
   endpoint: Endpoint.path(({ request }) => {
     const model = String(request.model.id)

packages/ai/src/providers/openrouter.ts

@@ -164,6 +164,7 @@ const bodyOptions = (input: unknown) => {
 export const route = Route.make({
   id: ADAPTER,
   provider: profile.provider,
+  providerMetadataKey: "openrouter",
   protocol,
   endpoint: Endpoint.path("/chat/completions", { baseURL: profile.baseURL }),
   framing: Framing.sse,

packages/ai/src/route/client.ts

@@ -89,6 +89,7 @@ export interface RouteDefaultsInput {
 export interface RoutePatch<Body, Prepared> extends RouteDefaultsInput {
   readonly id?: string
   readonly provider?: string | ProviderID
+  readonly providerMetadataKey?: string
   readonly auth?: Auth.Definition
   readonly transport?: Transport<Body, Prepared, unknown>
   readonly endpoint?: EndpointPatch<Body>
@@ -289,11 +290,16 @@ function makeFromTransport<Body, Prepared, Frame, Event, State>(
       defaults: routeInput.defaults ?? {},
       body: protocol.body,
       with: (patch: RoutePatch<Body, Prepared>) => {
-        const { id, provider, auth, transport, endpoint, ...defaults } = patch
+        const { id, provider, providerMetadataKey, auth, transport, endpoint, ...defaults } = patch
         return build({
           ...routeInput,
           id: id ?? routeInput.id,
           provider: provider ?? routeInput.provider,
+          providerMetadataKey:
+            providerMetadataKey ??
+            (provider !== undefined && String(provider) !== String(routeInput.provider)
+              ? String(provider)
+              : routeInput.providerMetadataKey),
           auth: auth ?? routeInput.auth,
           endpoint: endpoint ? Endpoint.merge(routeInput.endpoint, endpoint) : routeInput.endpoint,
           transport: (transport as Transport<Body, Prepared, Frame> | undefined) ?? routeInput.transport,

packages/ai/src/route/executor.ts

@@ -40,17 +40,6 @@ const headerDetails = (headers: Headers.Headers) =>
 const normalizedHeaders = (headers: Headers.Headers) =>
   Object.fromEntries(Object.entries(headers).map(([key, value]) => [key.toLowerCase(), value]))
 
-const requestId = (headers: Record<string, string>) => {
-  return (
-    headers["x-request-id"] ??
-    headers["request-id"] ??
-    headers["x-amzn-requestid"] ??
-    headers["x-amz-request-id"] ??
-    headers["x-goog-request-id"] ??
-    headers["cf-ray"]
-  )
-}
-
 const retryAfterMs = (headers: Record<string, string>) => {
   const millis = Number(headers["retry-after-ms"])
   if (Number.isFinite(millis)) return Math.max(0, millis)
@@ -147,14 +136,12 @@ const responseHttp = (input: {
   readonly request: HttpClientRequest.HttpClientRequest
   readonly response: HttpClientResponse.HttpClientResponse
   readonly body: ReturnType<typeof responseBody>
-  readonly requestId?: string | undefined
   readonly rateLimit?: HttpRateLimitDetails | undefined
 }) =>
   new HttpContext({
     request: requestDetails(input.request),
     response: responseDetails(input.response),
     ...input.body,
-    requestId: input.requestId,
     rateLimit: input.rateLimit,
   })
 
@@ -179,7 +166,6 @@ const statusError =
             request,
             response,
             body: details,
-            requestId: requestId(headers),
             rateLimit,
           }),
         }),
@@ -216,7 +202,6 @@ export const classifyHttpFailure = (input: {
           ? undefined
           : new HttpResponseDetails({ status: input.status, headers: headerDetails(Headers.fromInput(headers)) }),
       ...details,
-      requestId: requestId(headers),
       rateLimit,
     }),
   })

packages/ai/src/schema/errors.ts

@@ -29,7 +29,6 @@ export class HttpContext extends Schema.Class<HttpContext>("AI.HttpContext")({
   response: Schema.optional(HttpResponseDetails),
   body: Schema.optional(Schema.String),
   bodyTruncated: Schema.optional(Schema.Boolean),
-  requestId: Schema.optional(Schema.String),
   rateLimit: Schema.optional(HttpRateLimitDetails),
 }) {}
 

packages/ai/test/executor.test.ts

@@ -327,7 +327,6 @@ describe("RequestExecutor", () => {
           retryAfterMs: 0,
           rateLimit: { retryAfterMs: 0 },
           http: {
-            requestId: "req_123",
             request: {
               method: "POST",
               url: "https://provider.test/v1/chat?api_key=secret&key=secret&debug=1",

packages/ai/test/provider/anthropic-messages.test.ts

@@ -2,7 +2,7 @@ import { describe, expect } from "bun:test"
 import { Effect } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { CacheHint, LLM, AIError, LLMRequest, Message, ToolCallPart, ToolDefinition, Usage } from "../../src/index.js"
-import { Auth, LLMClient } from "../../src/route.js"
+import { Auth, Endpoint, LLMClient, Route } from "../../src/route.js"
 import { compileRequest } from "../../src/route/client.js"
 import * as AnthropicMessages from "../../src/protocols/anthropic-messages.js"
 import { GoogleVertexMessages } from "../../src/providers.js"
@@ -810,6 +810,99 @@ describe("Anthropic Messages route", () => {
     }),
   )
 
+  it.effect("round-trips compatible provider metadata in its own namespace", () =>
+    Effect.gen(function* () {
+      const compatible = Route.make({
+        id: "custom-anthropic-messages",
+        provider: "custom-anthropic",
+        protocol: AnthropicMessages.protocol,
+        endpoint: Endpoint.path("/messages", { baseURL: "https://compatible.test/v1" }),
+        auth: Auth.header("x-api-key", "test"),
+        framing: AnthropicMessages.framing,
+      }).model({ id: "custom-model" })
+      const result = [
+        {
+          type: "web_search_result",
+          url: "https://example.com",
+          citations: [{ type: "web_search_result_location", cited_text: "Example" }],
+        },
+      ]
+      const response = yield* LLMClient.generate(LLM.request({ model: compatible, prompt: "Search." })).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              { type: "message_start", message: { usage: { input_tokens: 5, custom_start: true } } },
+              { type: "content_block_start", index: 0, content_block: { type: "thinking", thinking: "Thinking." } },
+              { type: "content_block_delta", index: 0, delta: { type: "signature_delta", signature: "custom_sig" } },
+              { type: "content_block_stop", index: 0 },
+              {
+                type: "content_block_start",
+                index: 1,
+                content_block: { type: "redacted_thinking", data: "custom_redacted" },
+              },
+              { type: "content_block_stop", index: 1 },
+              {
+                type: "content_block_start",
+                index: 2,
+                content_block: {
+                  type: "server_tool_use",
+                  id: "custom_tool",
+                  name: "web_search",
+                  input: { query: "example" },
+                },
+              },
+              { type: "content_block_stop", index: 2 },
+              {
+                type: "content_block_start",
+                index: 3,
+                content_block: { type: "web_search_tool_result", tool_use_id: "custom_tool", content: result },
+              },
+              { type: "content_block_stop", index: 3 },
+              {
+                type: "message_delta",
+                delta: { stop_reason: "end_turn", stop_sequence: "custom_stop" },
+                usage: { output_tokens: 2, custom_terminal: true },
+              },
+              { type: "message_stop" },
+            ),
+          ),
+        ),
+      )
+
+      expect(response.message.content).toMatchObject([
+        { type: "reasoning", text: "Thinking.", providerMetadata: { "custom-anthropic": { signature: "custom_sig" } } },
+        { type: "reasoning", text: "", providerMetadata: { "custom-anthropic": { redactedData: "custom_redacted" } } },
+        { type: "tool-call", id: "custom_tool", providerExecuted: true },
+        {
+          type: "tool-result",
+          providerExecuted: true,
+          providerMetadata: { "custom-anthropic": { blockType: "web_search_tool_result", result } },
+        },
+      ])
+      expect(response.usage?.providerMetadata).toEqual({
+        "custom-anthropic": { input_tokens: 5, custom_start: true, output_tokens: 2, custom_terminal: true },
+      })
+      expect(response.events.at(-1)).toMatchObject({
+        providerMetadata: { "custom-anthropic": { stopSequence: "custom_stop" } },
+      })
+
+      const prepared = yield* compileRequest(
+        LLM.request({ model: compatible, messages: [response.message], cache: "none" }),
+      )
+      expect(prepared.body.messages).toEqual([
+        {
+          role: "assistant",
+          content: [
+            { type: "thinking", thinking: "Thinking.", signature: "custom_sig" },
+            { type: "redacted_thinking", data: "custom_redacted" },
+            { type: "server_tool_use", id: "custom_tool", name: "web_search", input: { query: "example" } },
+            { type: "web_search_tool_result", tool_use_id: "custom_tool", content: result },
+          ],
+        },
+      ])
+    }),
+  )
+
   it.effect("parses text, reasoning, and usage stream fixtures", () =>
     Effect.gen(function* () {
       const body = sseEvents(

packages/ai/test/provider/bedrock-converse.test.ts

@@ -569,6 +569,57 @@ describe("Bedrock Converse route", () => {
     }),
   )
 
+  it.effect("round-trips reassigned provider reasoning and usage metadata in its own namespace", () =>
+    Effect.gen(function* () {
+      const compatible = model.route.with({ provider: "custom-bedrock" }).model({ id: model.id })
+      const redactedData = "cmVkYWN0ZWQtdGhpbmtpbmc="
+      const response = yield* LLMClient.generate(LLMRequest.update(baseRequest, { model: compatible })).pipe(
+        Effect.provide(
+          fixedBytes(
+            eventStreamBody(
+              ["messageStart", { role: "assistant" }],
+              ["contentBlockDelta", { contentBlockIndex: 0, delta: { reasoningContent: { text: "Let me think." } } }],
+              ["contentBlockDelta", { contentBlockIndex: 0, delta: { reasoningContent: { signature: "custom_sig" } } }],
+              ["contentBlockStop", { contentBlockIndex: 0 }],
+              [
+                "contentBlockDelta",
+                { contentBlockIndex: 1, delta: { reasoningContent: { redactedContent: redactedData } } },
+              ],
+              ["contentBlockStop", { contentBlockIndex: 1 }],
+              ["messageStop", { stopReason: "end_turn" }],
+              ["metadata", { usage: { inputTokens: 5, outputTokens: 2, totalTokens: 7 } }],
+            ),
+          ),
+        ),
+      )
+
+      expect(response.message.content).toEqual([
+        {
+          type: "reasoning",
+          text: "Let me think.",
+          providerMetadata: { "custom-bedrock": { signature: "custom_sig" } },
+        },
+        { type: "reasoning", text: "", providerMetadata: { "custom-bedrock": { redactedData } } },
+      ])
+      expect(response.usage?.providerMetadata).toEqual({
+        "custom-bedrock": { inputTokens: 5, outputTokens: 2, totalTokens: 7 },
+      })
+
+      const prepared = yield* compileRequest(
+        LLM.request({ model: compatible, messages: [response.message], cache: "none" }),
+      )
+      expect(prepared.body.messages).toEqual([
+        {
+          role: "assistant",
+          content: [
+            { reasoningContent: { reasoningText: { text: "Let me think.", signature: "custom_sig" } } },
+            { reasoningContent: { redactedContent: redactedData } },
+          ],
+        },
+      ])
+    }),
+  )
+
   it.effect("preserves reasoning signatures when contentBlockStop is missing", () =>
     Effect.gen(function* () {
       const response = yield* LLMClient.generate(baseRequest).pipe(

packages/ai/test/provider/bedrock-mantle.test.ts

@@ -3,6 +3,7 @@ import { Effect } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { LLM, Message } from "../../src/index.js"
 import { AmazonBedrockMantle } from "../../src/providers.js"
+import { model } from "../../src/providers/amazon-bedrock/mantle.js"
 import { OpenAIResponses } from "../../src/protocols/openai-responses.js"
 import { compileRequest, LLMClient } from "../../src/route/client.js"
 import { it } from "../lib/effect.js"
@@ -17,13 +18,16 @@ const credentials = {
 }
 
 describe("Amazon Bedrock Mantle provider", () => {
-  it.effect("uses Chat by default and exposes Responses", () =>
+  it.effect("uses Responses by default and exposes Chat explicitly", () =>
     Effect.gen(function* () {
       const provider = AmazonBedrockMantle.configure({ credentials })
-      expect(provider.responses("openai.gpt-oss-120b").route.transport).toBe(OpenAIResponses.httpTransport)
-      const chat = yield* compileRequest(LLM.request({ model: provider.model("openai.gpt-oss-120b"), prompt: "Hi" }))
+      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(OpenAIResponses.httpTransport)
+      const chat = yield* compileRequest(LLM.request({ model: provider.chat("openai.gpt-oss-120b"), prompt: "Hi" }))
       const responses = yield* compileRequest(
-        LLM.request({ model: provider.responses("openai.gpt-oss-120b"), prompt: "Hi" }),
+        LLM.request({ model: provider.model("openai.gpt-oss-120b"), prompt: "Hi" }),
       )
 
       expect(chat).toMatchObject({
@@ -36,6 +40,23 @@ describe("Amazon Bedrock Mantle provider", () => {
         protocol: "openai-responses",
         body: { model: "openai.gpt-oss-120b", store: false },
       })
+      expect(provider.model("openai.gpt-oss-120b").route.providerMetadataKey).toBe("mantle")
+      expect(provider.chat("openai.gpt-oss-120b").route.providerMetadataKey).toBe("mantle")
+    }),
+  )
+
+  it.effect("preserves configured top-p generation defaults for Chat 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 responses = yield* compileRequest(
+        LLM.request({ model: AmazonBedrockMantle.responsesModel("openai.gpt-oss-120b", settings), prompt: "Hi" }),
+      )
+
+      expect(chat.body.top_p).toBe(0.8)
+      expect(responses.body.top_p).toBe(0.8)
     }),
   )
 
@@ -107,6 +128,9 @@ describe("Amazon Bedrock Mantle provider", () => {
         LLM.request({ model, messages: [response.message, Message.user("Continue.")] }),
       )
 
+      expect(response.message.content.find((part) => part.type === "reasoning")?.providerMetadata).toEqual({
+        mantle: { itemId: "msg_95d4d0af4350432a", reasoningEncryptedContent: "mantle-state" },
+      })
       expect(prepared.body.input).toEqual([
         {
           type: "reasoning",

packages/ai/test/provider/cloudflare.test.ts

@@ -126,7 +126,7 @@ describe("Cloudflare", () => {
       expect(response.reasoning).toBe("Thinking")
       expect(response.events.filter(LLMEvent.is.reasoningDelta)).toHaveLength(2)
       expect(response.message.content.find((part) => part.type === "reasoning")?.providerMetadata).toEqual({
-        openai: { reasoningField: "reasoning", reasoningDetails: merged },
+        "cloudflare-ai-gateway": { reasoningField: "reasoning", reasoningDetails: merged },
       })
 
       const replay = yield* compileRequest(LLM.request({ model, messages: [response.message] }))

packages/ai/test/provider/google-vertex.test.ts

@@ -6,7 +6,7 @@ import { GoogleVertex, GoogleVertexChat, GoogleVertexMessages, GoogleVertexRespo
 import { LLMClient } from "../../src/route.js"
 import { compileRequest } from "../../src/route/client.js"
 import { it } from "../lib/effect.js"
-import { dynamicResponse } from "../lib/http.js"
+import { dynamicResponse, fixedResponse } from "../lib/http.js"
 import { deltaChunk, finishChunk } from "../lib/openai-chunks.js"
 import { sseEvents } from "../lib/sse.js"
 
@@ -89,7 +89,7 @@ describe("Google Vertex providers", () => {
                 id: "call_1",
                 name: "lookup",
                 input: { query: "weather" },
-                providerMetadata: { google: { functionCallId: "provider_call_1" } },
+                providerMetadata: { vertex: { functionCallId: "provider_call_1" } },
               }),
             ]),
             Message.tool({
@@ -97,7 +97,7 @@ describe("Google Vertex providers", () => {
               name: "lookup",
               result: "sunny",
               resultType: "text",
-              providerMetadata: { google: { functionCallId: "provider_call_1" } },
+              providerMetadata: { vertex: { functionCallId: "provider_call_1" } },
             }),
           ],
         }),
@@ -122,6 +122,91 @@ describe("Google Vertex providers", () => {
     }),
   )
 
+  it.effect("round-trips Vertex Gemini metadata through signed content, tool calls, and usage", () =>
+    Effect.gen(function* () {
+      const model = GoogleVertex.configure({
+        accessToken: "vertex-token",
+        project: "vertex-project",
+      }).model("gemini-3.5-flash")
+      const response = yield* LLMClient.generate(LLM.request({ model, prompt: "Check the weather." })).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents({
+              candidates: [
+                {
+                  content: {
+                    role: "model",
+                    parts: [
+                      { text: "Thinking.", thought: true, thoughtSignature: "reasoning_sig" },
+                      { text: "Checking.", thoughtSignature: "text_sig" },
+                      {
+                        functionCall: { id: "provider_call_1", name: "lookup", args: { query: "weather" } },
+                        thoughtSignature: "tool_sig",
+                      },
+                    ],
+                  },
+                  finishReason: "STOP",
+                },
+              ],
+              promptFeedback: { blockReasonMessage: "Reviewed" },
+              usageMetadata: { promptTokenCount: 5, candidatesTokenCount: 2, thoughtsTokenCount: 1 },
+            }),
+          ),
+        ),
+      )
+      const reasoning = response.events.find((event) => event.type === "reasoning-end")
+      const text = response.events.find((event) => event.type === "text-delta")
+      const toolCall = response.toolCalls[0]
+
+      expect(reasoning?.providerMetadata).toEqual({ vertex: { thoughtSignature: "reasoning_sig" } })
+      expect(text?.providerMetadata).toEqual({ vertex: { thoughtSignature: "text_sig" } })
+      expect(toolCall).toMatchObject({
+        id: "provider_call_1",
+        providerMetadata: { vertex: { thoughtSignature: "tool_sig" } },
+      })
+      expect(response.usage?.providerMetadata).toEqual({
+        vertex: { promptTokenCount: 5, candidatesTokenCount: 2, thoughtsTokenCount: 1 },
+      })
+      expect(response.events.at(-1)?.providerMetadata).toEqual({
+        vertex: { promptFeedback: { blockReasonMessage: "Reviewed" } },
+      })
+
+      const prepared = yield* compileRequest(
+        LLM.request({
+          model,
+          messages: [
+            Message.assistant([
+              { type: "reasoning", text: "Thinking.", providerMetadata: reasoning?.providerMetadata },
+              { type: "text", text: "Checking.", providerMetadata: text?.providerMetadata },
+              ToolCallPart.make({
+                id: toolCall.id,
+                name: toolCall.name,
+                input: toolCall.input,
+                providerMetadata: toolCall.providerMetadata,
+              }),
+            ]),
+            Message.tool({ id: toolCall.id, name: toolCall.name, result: "sunny", resultType: "text" }),
+          ],
+        }),
+      )
+
+      expect(prepared.body.contents).toEqual([
+        {
+          role: "model",
+          parts: [
+            { text: "Thinking.", thought: true, thoughtSignature: "reasoning_sig" },
+            { text: "Checking.", thoughtSignature: "text_sig" },
+            { functionCall: { name: "lookup", args: { query: "weather" } }, thoughtSignature: "tool_sig" },
+          ],
+        },
+        {
+          role: "user",
+          parts: [{ functionResponse: { name: "lookup", response: { name: "lookup", content: "sunny" } } }],
+        },
+      ])
+    }),
+  )
+
   it.effect("projects Anthropic Messages onto the Vertex raw-predict API", () =>
     Effect.gen(function* () {
       const model = GoogleVertexMessages.configure({

packages/ai/test/provider/native-providers.test.ts

@@ -2,13 +2,80 @@ import { describe, expect } from "bun:test"
 import { ConfigProvider, Effect } from "effect"
 import { HttpClientRequest } from "effect/unstable/http"
 import { LLM, Message, ToolDefinition } from "../../src/index.js"
-import { Cerebras, DeepInfra, Groq, TogetherAI } from "../../src/providers/index.js"
+import {
+  AmazonBedrock,
+  AmazonBedrockMantle,
+  Anthropic,
+  AnthropicCompatible,
+  Azure,
+  Cerebras,
+  CloudflareAIGateway,
+  CloudflareWorkersAI,
+  DeepInfra,
+  Google,
+  GoogleVertex,
+  GoogleVertexChat,
+  GoogleVertexMessages,
+  GoogleVertexResponses,
+  Groq,
+  OpenAI,
+  OpenAICompatible,
+  OpenAICompatibleResponses,
+  OpenRouter,
+  TogetherAI,
+  XAI,
+} from "../../src/providers/index.js"
 import { compileRequest } from "../../src/route/client.js"
 import { it } from "../lib/effect.js"
 import { dynamicResponse } from "../lib/http.js"
 import { sseEvents } from "../lib/sse.js"
 
 describe("native OpenAI-compatible providers", () => {
+  it.effect("assigns provider-owned metadata namespaces across native routes", () =>
+    Effect.gen(function* () {
+      const vertex = { project: "project", accessToken: "token" }
+      const providers = [
+        [OpenAI.configure({ apiKey: "test" }).chat("model"), "openai"],
+        [OpenAI.configure({ apiKey: "test" }).responses("model"), "openai"],
+        [Azure.configure({ resourceName: "resource", apiKey: "test" }).chat("model"), "azure"],
+        [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" }).responses("model"), "mantle"],
+        [Google.configure({ apiKey: "test" }).model("model"), "google"],
+        [GoogleVertex.configure(vertex).model("model"), "vertex"],
+        [GoogleVertexChat.configure(vertex).model("model"), "vertex"],
+        [GoogleVertexResponses.configure(vertex).model("model"), "vertex"],
+        [GoogleVertexMessages.configure(vertex).model("model"), "anthropic"],
+        [Anthropic.configure({ apiKey: "test" }).model("model"), "anthropic"],
+        [
+          AnthropicCompatible.configure({ baseURL: "https://example.test/v1", provider: "minimax" }).model("model"),
+          "minimax",
+        ],
+        [
+          OpenAICompatible.configure({ baseURL: "https://example.test/v1", provider: "custom" }).model("model"),
+          "custom",
+        ],
+        [
+          OpenAICompatibleResponses.configure({ baseURL: "https://example.test/v1", provider: "custom" }).model(
+            "model",
+          ),
+          "custom",
+        ],
+        [Cerebras.configure({ apiKey: "test" }).model("model"), "cerebras"],
+        [DeepInfra.configure({ apiKey: "test" }).model("model"), "deepinfra"],
+        [TogetherAI.configure({ apiKey: "test" }).model("model"), "togetherai"],
+        [CloudflareAIGateway.configure({ accountId: "account" }).model("model"), "cloudflare-ai-gateway"],
+        [CloudflareWorkersAI.configure({ accountId: "account" }).model("model"), "cloudflare-workers-ai"],
+        [OpenRouter.configure({ apiKey: "test" }).model("model"), "openrouter"],
+        [XAI.configure({ apiKey: "test" }).chat("model"), "xai"],
+        [XAI.configure({ apiKey: "test" }).responses("model"), "xai"],
+      ] as const
+
+      for (const [model, key] of providers) expect(model.route.providerMetadataKey).toBe(key)
+    }),
+  )
+
   it.effect("preserves native Together AI and Cerebras provider and route identities", () =>
     Effect.gen(function* () {
       const together = TogetherAI.configure({ apiKey: "fixture" }).model("meta-llama/Llama-3.3-70B")

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

@@ -68,11 +68,13 @@ for (const item of cases) {
           expect(response.text.replaceAll(",", "").trim()).toBe("37887")
           expect(response.reasoning.length).toBeGreaterThan(0)
           expect(response.events.some(LLMEvent.is.reasoningDelta)).toBe(true)
-          const metadata = response.message.content.find((part) => part.type === "reasoning")?.providerMetadata
-          expect(metadata?.openai?.reasoningField).toBe(item.structured ? "reasoning" : "reasoning_content")
-          expect(Array.isArray(metadata?.openai?.reasoningDetails)).toBe(item.structured)
+          const metadata = response.message.content.find((part) => part.type === "reasoning")?.providerMetadata?.[
+            item.model.route.providerMetadataKey ?? String(item.model.provider)
+          ]
+          expect(metadata?.reasoningField).toBe(item.structured ? "reasoning" : "reasoning_content")
+          expect(Array.isArray(metadata?.reasoningDetails)).toBe(item.structured)
           if (!item.structured) return
-          const details = metadata?.openai?.reasoningDetails
+          const details = metadata?.reasoningDetails
           if (!Array.isArray(details)) return
           expect(
             details.some(
@@ -126,7 +128,11 @@ for (const item of cases) {
           ).toMatch(/^Paris is sunny\.?$/)
           const details = events
             .filter(LLMEvent.is.reasoningEnd)
-            .map((event) => event.providerMetadata?.openai?.reasoningDetails)
+            .map(
+              (event) =>
+                event.providerMetadata?.[item.model.route.providerMetadataKey ?? String(item.model.provider)]
+                  ?.reasoningDetails,
+            )
             .find(Array.isArray)
           expect(Array.isArray(details)).toBe(item.structured)
           if (!item.structured || !Array.isArray(details)) return

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

@@ -903,6 +903,70 @@ describe("OpenAI Chat route", () => {
     }),
   )
 
+  it.effect("uses the configured provider metadata namespace for reasoning and usage", () =>
+    Effect.gen(function* () {
+      const selected = LanguageModel.update(model, {
+        route: { ...model.route, providerMetadataKey: "vendor" },
+      })
+      const details = [{ type: "reasoning.text", text: "thinking", signature: "signed" }]
+      const response = yield* LLMClient.generate(LLMRequest.update(request, { model: selected })).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              { choices: [{ delta: { reasoning: "thinking", reasoning_details: details } }] },
+              deltaChunk({ content: "Hello" }),
+              deltaChunk({}, "stop"),
+              usageChunk({ prompt_tokens: 5, completion_tokens: 2, total_tokens: 7 }),
+            ),
+          ),
+        ),
+      )
+
+      expect(response.message.content.find((part) => part.type === "reasoning")?.providerMetadata).toEqual({
+        vendor: { reasoningField: "reasoning", reasoningDetails: details },
+      })
+      expect(response.usage?.providerMetadata).toEqual({
+        vendor: { prompt_tokens: 5, completion_tokens: 2, total_tokens: 7 },
+      })
+
+      const replay = yield* compileRequest(LLM.request({ model: selected, messages: [response.message] }))
+      expect(replay.body.messages).toEqual([
+        { role: "assistant", content: "Hello", reasoning: "thinking", reasoning_details: details },
+      ])
+    }),
+  )
+
+  it.effect("falls back to the selected provider for the metadata namespace", () =>
+    Effect.gen(function* () {
+      const compatible = model.route.with({ provider: "deepseek" }).model({ id: "deepseek-chat" })
+      const selected = LanguageModel.update(compatible, {
+        route: { ...compatible.route, providerMetadataKey: undefined },
+      })
+      const response = yield* LLMClient.generate(LLMRequest.update(request, { model: selected })).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              deltaChunk({ reasoning_content: "thinking" }),
+              deltaChunk({ content: "Hello" }),
+              deltaChunk({}, "stop"),
+              usageChunk({ prompt_tokens: 5, completion_tokens: 2, total_tokens: 7 }),
+            ),
+          ),
+        ),
+      )
+
+      expect(response.message.content.find((part) => part.type === "reasoning")?.providerMetadata).toEqual({
+        deepseek: { reasoningField: "reasoning_content" },
+      })
+      expect(response.usage?.providerMetadata).toEqual({
+        deepseek: { prompt_tokens: 5, completion_tokens: 2, total_tokens: 7 },
+      })
+
+      const replay = yield* compileRequest(LLM.request({ model: selected, messages: [response.message] }))
+      expect(replay.body.messages).toEqual([{ role: "assistant", content: "Hello", reasoning_content: "thinking" }])
+    }),
+  )
+
   it.effect("parses and replays a configured custom reasoning field", () =>
     Effect.gen(function* () {
       const custom = LanguageModel.update(model, { compatibility: { reasoningField: "vendor_reasoning" } })

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

@@ -437,7 +437,7 @@ describe("OpenAI-compatible Chat route", () => {
         outputTokens: undefined,
         totalTokens: undefined,
         providerMetadata: {
-          openai: {
+          deepseek: {
             prompt_tokens: null,
             completion_tokens: null,
             total_tokens: null,

packages/ai/test/provider/openai-compatible-responses.test.ts

@@ -195,19 +195,19 @@ describe("Open Responses-compatible route", () => {
           model,
           messages: [
             Message.assistant([
-              { type: "text", text: "Kept.", providerMetadata: { openresponses: { itemId: "history_1" } } },
+              { type: "text", text: "Kept.", providerMetadata: { "openai-compatible": { itemId: "history_1" } } },
               {
                 type: "text",
                 text: "Long.",
-                providerMetadata: { openresponses: { itemId: `history_${"a".repeat(64)}` } },
+                providerMetadata: { "openai-compatible": { itemId: `history_${"a".repeat(64)}` } },
               },
               {
                 type: "text",
                 text: "Opaque.",
-                providerMetadata: { openresponses: { itemId: "provider_value/with+symbols" } },
+                providerMetadata: { "openai-compatible": { itemId: "provider_value/with+symbols" } },
               },
-              { type: "text", text: "No suffix.", providerMetadata: { openresponses: { itemId: "msg_" } } },
-              { type: "text", text: "No prefix.", providerMetadata: { openresponses: { itemId: "_item" } } },
+              { type: "text", text: "No suffix.", providerMetadata: { "openai-compatible": { itemId: "msg_" } } },
+              { type: "text", text: "No prefix.", providerMetadata: { "openai-compatible": { itemId: "_item" } } },
             ]),
           ],
         }),
@@ -267,7 +267,7 @@ describe("Open Responses-compatible route", () => {
               name: item.type,
               result: { type: "json", value: item },
               providerExecuted: true,
-              providerMetadata: { openresponses: { itemId: item.id } },
+              providerMetadata: { example: { itemId: item.id } },
             }),
           ),
         }),
@@ -302,7 +302,7 @@ describe("Open Responses-compatible route", () => {
       )
 
       expect(response.message.content).toEqual([
-        { type: "text", text: "Indexed", providerMetadata: { openresponses: { itemId: "msg_1" } } },
+        { type: "text", text: "Indexed", providerMetadata: { "openai-compatible": { itemId: "msg_1" } } },
       ])
     }),
   )
@@ -368,7 +368,7 @@ describe("Open Responses-compatible route", () => {
                 ),
               )
 
-              const metadata = { openresponses: { itemId: routing.id } }
+              const metadata = { "openai-compatible": { itemId: routing.id } }
               if (fixture.item.type === "function_call") {
                 expect(response.toolCalls).toEqual([
                   expect.objectContaining({
@@ -386,7 +386,7 @@ describe("Open Responses-compatible route", () => {
                     type: "reasoning",
                     text: "Preserved",
                     providerMetadata: {
-                      openresponses: { itemId: routing.id, reasoningEncryptedContent: "encrypted-state" },
+                      "openai-compatible": { itemId: routing.id, reasoningEncryptedContent: "encrypted-state" },
                     },
                   },
                 ])
@@ -438,22 +438,26 @@ describe("Open Responses-compatible route", () => {
             {
               type: "reasoning",
               text: "First.",
-              providerMetadata: { openresponses: { itemId: routing.id } },
+              providerMetadata: { "openai-compatible": { itemId: routing.id } },
             },
             {
               type: "reasoning",
               text: "Second.",
-              providerMetadata: { openresponses: { itemId: routing.id, reasoningEncryptedContent: "final-state" } },
+              providerMetadata: {
+                "openai-compatible": { itemId: routing.id, reasoningEncryptedContent: "final-state" },
+              },
             },
           ])
           expect(response.events.filter(LLMEvent.is.reasoningEnd)).toEqual([
             expect.objectContaining({
               id: `${routing.id}:0`,
-              providerMetadata: { openresponses: { itemId: routing.id } },
+              providerMetadata: { "openai-compatible": { itemId: routing.id } },
             }),
             expect.objectContaining({
               id: `${routing.id}:1`,
-              providerMetadata: { openresponses: { itemId: routing.id, reasoningEncryptedContent: "final-state" } },
+              providerMetadata: {
+                "openai-compatible": { itemId: routing.id, reasoningEncryptedContent: "final-state" },
+              },
             }),
           ])
         }),
@@ -483,7 +487,7 @@ describe("Open Responses-compatible route", () => {
             id: "call_1",
             name: "lookup",
             input: { query: "complete" },
-            providerMetadata: { openresponses: { itemId: "" } },
+            providerMetadata: { "openai-compatible": { itemId: "" } },
           }),
         ])
       }),
@@ -510,7 +514,7 @@ describe("Open Responses-compatible route", () => {
         )
 
         expect(response.message.content).toEqual([
-          { type: "text", text: "Before after", providerMetadata: { openresponses: { itemId: "msg_1" } } },
+          { type: "text", text: "Before after", providerMetadata: { "openai-compatible": { itemId: "msg_1" } } },
         ])
         expect(response.events.map((event) => event.type)).toEqual([
           "step-start",
@@ -662,7 +666,7 @@ describe("Open Responses-compatible route", () => {
 
       expect(response.events.find(LLMEvent.is.toolCall)).toMatchObject({
         input: { query: "complete" },
-        providerMetadata: { openresponses: { itemId: "item_1" } },
+        providerMetadata: { example: { itemId: "item_1" } },
       })
     }),
   )
@@ -694,7 +698,7 @@ describe("Open Responses-compatible route", () => {
       )
 
       expect(response.events.find((event) => event.type === "reasoning-end")).toMatchObject({
-        providerMetadata: { openresponses: { itemId: "rs_raw", reasoningEncryptedContent: "raw-state" } },
+        providerMetadata: { "openai-compatible": { itemId: "rs_raw", reasoningEncryptedContent: "raw-state" } },
       })
     }),
   )
@@ -743,7 +747,7 @@ describe("Open Responses-compatible route", () => {
             Message.assistant({
               type: "text",
               text: "Unclassified.",
-              providerMetadata: { openresponses: { phase: null } },
+              providerMetadata: { "openai-compatible": { phase: null } },
             }),
           ],
         }),
@@ -802,7 +806,7 @@ describe("Open Responses-compatible route", () => {
         {
           type: "text",
           text: "I can't help with that.",
-          providerMetadata: { openresponses: { itemId: "msg_refusal" } },
+          providerMetadata: { example: { itemId: "msg_refusal" } },
         },
       ])
 
@@ -891,7 +895,7 @@ describe("Open Responses-compatible route", () => {
 
       expect(response.toolCalls).toEqual([])
       expect(response.events.find(LLMEvent.is.finish)).toMatchObject({
-        providerMetadata: { openresponses: { responseId: "resp_1" } },
+        providerMetadata: { example: { responseId: "resp_1" } },
       })
     }),
   )

packages/ai/test/provider/openrouter.test.ts

@@ -295,7 +295,7 @@ describe("OpenRouter", () => {
               {
                 type: "reasoning",
                 text: "Thinking",
-                providerMetadata: { openai: { reasoningField: "reasoning", reasoningDetails: details } },
+                providerMetadata: { openrouter: { reasoningField: "reasoning", reasoningDetails: details } },
               },
             ]),
           ],
@@ -328,7 +328,7 @@ describe("OpenRouter", () => {
             Message.assistant({
               type: "reasoning",
               text: "Thinking",
-              providerMetadata: { openai: { reasoningField: "reasoning", reasoningDetails: details } },
+              providerMetadata: { openrouter: { reasoningField: "reasoning", reasoningDetails: details } },
             }),
           ],
         }),
@@ -354,7 +354,7 @@ describe("OpenRouter", () => {
             Message.assistant({
               type: "reasoning",
               text: "AB",
-              providerMetadata: { openai: { reasoningField: "reasoning", reasoningDetails: details } },
+              providerMetadata: { openrouter: { reasoningField: "reasoning", reasoningDetails: details } },
             }),
           ],
         }),

packages/ai/test/route.test.ts

@@ -40,4 +40,13 @@ describe("Route.with", () => {
       "x-patch": "patch",
     })
   })
+
+  test("assigns metadata ownership to a replacement provider and preserves explicit overrides", () => {
+    const route = OpenAIChat.route.with({ provider: "azure" })
+    const overridden = route.with({ providerMetadataKey: "custom-azure" }).with({ headers: { "x-test": "value" } })
+
+    expect(route.providerMetadataKey).toBe("azure")
+    expect(overridden.providerMetadataKey).toBe("custom-azure")
+    expect(overridden.defaults).not.toHaveProperty("providerMetadataKey")
+  })
 })

packages/app/README.md

@@ -31,7 +31,7 @@ Your app is ready to be deployed!
 
 ## E2E Testing
 
-Playwright starts the Vite dev server automatically via `webServer`, and UI tests expect an opencode backend at `localhost:4096` by default.
+Locally, Playwright starts the Vite dev server automatically via `webServer`, or reuses one already running at the configured address. The browser suite uses isolated API fixtures rather than a live opencode backend.
 
 ```bash
 bunx playwright install chromium
@@ -39,11 +39,35 @@ bun run test:e2e:local
 bun run test:e2e:local -- --grep "settings"
 ```
 
+CI builds the app once and runs the same suite against Vite preview, serving production assets from `dist`. Managed built runs never reuse an existing server, so a running dev server cannot silently replace the production build. To run this mode locally:
+
+```bash
+bun run test:e2e:built
+bun run test:e2e:built -- --grep "settings"
+```
+
+To test an already-running dev server without starting or building a server:
+
+```bash
+PLAYWRIGHT_BASE_URL=http://127.0.0.1:4444 bun run test:e2e
+```
+
+For an already-running production build, also set `PLAYWRIGHT_BUILD=1` so the fixture API uses the app's origin:
+
+```bash
+PLAYWRIGHT_BUILD=1 PLAYWRIGHT_BASE_URL=http://127.0.0.1:4444 bun run test:e2e
+```
+
+External targets must use HTTP because fixture URLs use HTTP. `PLAYWRIGHT_BASE_URL` skips server startup and building in either mode.
+
+Compiled CLI startup and service lifecycle coverage runs separately in CI via `packages/cli/script/service-smoke.ts`.
+
 Environment options:
 
-- `PLAYWRIGHT_SERVER_HOST` / `PLAYWRIGHT_SERVER_PORT` (backend address, default: `localhost:4096`)
-- `PLAYWRIGHT_PORT` (Vite dev server port, default: `3000`)
-- `PLAYWRIGHT_BASE_URL` (override base URL, default: `http://localhost:<PLAYWRIGHT_PORT>`)
+- `PLAYWRIGHT_BUILD=1` (build and preview locally; always enabled when `CI` is set)
+- `PLAYWRIGHT_SERVER_HOST` / `PLAYWRIGHT_SERVER_PORT` (dev fixture API address, default: `127.0.0.1:4096`; built runs use the app's origin, matching production)
+- `PLAYWRIGHT_PORT` (managed dev or preview server port, default: `3000`)
+- `PLAYWRIGHT_BASE_URL` (use an externally managed app instead of starting a server; otherwise defaults to `http://127.0.0.1:<PLAYWRIGHT_PORT>`)
 
 ## Deployment
 

packages/app/e2e/performance/README.md

@@ -44,6 +44,7 @@ The suite contains:
 - single-session tab close timing through stable home restoration
 - cached session repaint and mutation tracing
 - streaming timeline throughput, RAF-gap, long-task, geometry, and remount diagnostics
+- retained renderer heap with a large model catalog across repeated session navigation
 
 All benchmarks import the shared `benchmark` fixture. Pages created through Playwright's `page` fixture automatically capture main-frame navigation history and emit a Chrome trace when `OPENCODE_PERFORMANCE_TRACE_DIR` is set. Benchmarks that need isolated browser contexts use `withBenchmarkPage`, which owns the context and the same diagnostics lifecycle.
 
@@ -78,6 +79,26 @@ Benchmarks do not assert machine-dependent performance budgets. Streaming proces
 
 Committed smoke and regression tests continue to own correctness coverage for pagination, tab paint, context resize, collapse state, and composer spacing.
 
+Tab-switch timing starts at `mousedown`, when mouse-selected tabs actually navigate, with a `click` fallback for keyboard activation. The probe excludes hidden/transparent content and intersects answers with their virtual-row clip and viewport. The tab workload requires the destination's final answer to be visible with Markdown ready. These results are not directly comparable to older click-start, geometry-only measurements. `stableObservedMs` includes confirmation across three correct samples; `firstCorrectObservedMs` is the first sample meeting all content and geometry checks. Neither is a compositor presentation timestamp.
+
+Each tab scenario reports one sample, including its raw observations. Use Playwright's `--repeat-each=5` for repeated measurements. Cached scenarios warm the destination at the same panel width before leaving it; a separate resized scenario validates reuse after opening the review pane changes that width.
+
+```sh
+bunx playwright test --config e2e/performance/playwright.config.ts \
+  timeline/session-tab-switch-benchmark.spec.ts --repeat-each=5
+```
+
+## Retained renderer memory
+
+Run the catalog workload against the production app bundle:
+
+```sh
+bunx playwright test --config e2e/performance/playwright.config.ts \
+  timeline/provider-memory-benchmark.spec.ts --repeat-each=3
+```
+
+`PROVIDER_MEMORY_MODELS` defaults to 1,200 and `PROVIDER_MEMORY_SWITCHES` defaults to 10. Each sample records Chromium's `Runtime.getHeapUsage` and `Memory.getDOMCounters` after an explicit garbage collection. This measures retained state, not allocation peaks or normal GC timing. It does not include worker heaps, the Electron main/GPU processes, or the OpenCode server, and must not be reported as total desktop RAM. Use identical model counts and navigation sequences for before/after comparisons.
+
 ## Chrome traces
 
 Set `OPENCODE_PERFORMANCE_TRACE_DIR` to emit a standard Chrome DevTools trace for every benchmark page automatically:

packages/app/e2e/performance/playwright.config.ts

@@ -1,7 +1,7 @@
 import config from "../../playwright.config"
 
 const port = Number(process.env.PLAYWRIGHT_PORT ?? 3000)
-process.env.PLAYWRIGHT_SERVER_PORT = String(port)
+process.env.PLAYWRIGHT_SERVER_PORT = new URL(process.env.PLAYWRIGHT_BASE_URL ?? `http://127.0.0.1:${port}`).port || "80"
 process.env.OPENCODE_PERFORMANCE_RUN_ID ??= `${new Date().toISOString().replace(/[:.]/g, "-")}-${process.pid}`
 
 export default {
@@ -12,9 +12,11 @@ export default {
   fullyParallel: false,
   workers: 1,
   reporter: [["html", { outputFolder: "../playwright-report/performance", open: "never" }], ["line"]],
-  webServer: {
-    ...config.webServer,
-    command: `bun run build && bun run serve -- --host 0.0.0.0 --port ${port} --strictPort`,
-    reuseExistingServer: false,
-  },
+  webServer: config.webServer
+    ? {
+        ...config.webServer,
+        command: `bun run build && bun run serve -- --host 0.0.0.0 --port ${port} --strictPort`,
+        reuseExistingServer: false,
+      }
+    : undefined,
 }

packages/app/e2e/performance/timeline-stability/scroll-interaction.spec.ts

@@ -126,13 +126,19 @@ test("keeps moving upward while drag-selecting above the timeline", async ({ pag
       )
     })
   })
-  const textBox = await text.boundingBox()
+  const textBox = await text.evaluate((element) => {
+    const range = document.createRange()
+    range.selectNodeContents(element)
+    const rect = range.getClientRects()[0]
+    return rect ? { x: rect.x, y: rect.y, width: rect.width, height: rect.height } : null
+  })
   const scrollBox = await scroller.boundingBox()
   expect(textBox).not.toBeNull()
   expect(scrollBox).not.toBeNull()
   if (!textBox || !scrollBox) return
 
-  await page.mouse.move(textBox.x + textBox.width - 10, textBox.y + textBox.height / 2)
+  // Start on a text line, not the empty right edge or gap between wrapped lines.
+  await page.mouse.move(textBox.x + Math.min(20, textBox.width / 2), textBox.y + textBox.height / 2)
   await page.mouse.down()
   await page.mouse.move(textBox.x + 20, scrollBox.y - 120, { steps: 30 })
 
@@ -195,6 +201,45 @@ test("does not pull a keyboard-scrolled user during shell remeasurement", async
   await reportVisualStability(testInfo, "keyboard-during-resize", trace, anchorPlan(regions))
 })
 
+test("keeps an older answer selected while scrolling within the interaction buffer", async ({ page }) => {
+  await setupTimeline(page, {
+    messages: history(80),
+    viewport: { width: 1400, height: 700 },
+    reducedMotion: true,
+  })
+  const scroller = page.locator(".scroll-view__viewport", { has: page.locator("[data-timeline-row]") })
+  const answer = page.getByText("History 78.", { exact: false })
+  await expect(answer).toBeVisible()
+  await expect
+    .poll(() =>
+      answer.evaluate((element) => element.closest('[data-component="markdown"]')?.hasAttribute("data-markdown-ready")),
+    )
+    .toBe(true)
+  const textBox = await answer.evaluate((element) => {
+    const range = document.createRange()
+    range.selectNodeContents(element)
+    const rect = range.getClientRects()[0]
+    return { x: rect.x, y: rect.y, width: rect.width, height: rect.height }
+  })
+  const scrollBox = await scroller.boundingBox()
+  expect(scrollBox).not.toBeNull()
+  if (!scrollBox) return
+  await page.mouse.move(textBox.x + Math.min(180, textBox.width - 2), textBox.y + textBox.height / 2)
+  await page.mouse.down()
+  await page.mouse.move(textBox.x + 2, textBox.y + textBox.height / 2, { steps: 30 })
+  await page.mouse.up()
+  await expect.poll(() => page.evaluate(() => window.getSelection()?.toString())).toContain("History 78.")
+  await page.mouse.move(scrollBox.x + scrollBox.width / 2, scrollBox.y + scrollBox.height / 2)
+  await page.mouse.wheel(0, -450)
+  await expect
+    .poll(() => scroller.evaluate((element) => element.scrollHeight - element.clientHeight - element.scrollTop))
+    .toBeGreaterThan(400)
+  await expect(answer).toHaveCount(1)
+  await expect.poll(() => page.evaluate(() => window.getSelection()?.toString())).toContain("History 78.")
+  await page.getByRole("heading", { name: "Timeline visual stability" }).click()
+  await expect.poll(() => page.evaluate(() => window.getSelection()?.isCollapsed)).toBe(true)
+})
+
 test("tracks keyboard scrolling from a focused timeline descendant", async ({ page }, testInfo) => {
   const shellID = "prt_descendant_keyboard_01_shell"
   const timeline = await setupTimeline(page, {
@@ -259,12 +304,16 @@ test("does not claim keyboard scrolling owned by a nested scrollable", async ({
   const before = await scroller.evaluate((element) => element.scrollTop)
   const nestedBefore = await nested.evaluate((element) => element.scrollTop)
   await nested.press("PageUp")
-  await page.waitForTimeout(300)
+  await expect.poll(() => nested.evaluate((element) => element.scrollTop)).toBeLessThan(nestedBefore)
   expect(await scroller.evaluate((element) => element.scrollTop)).toBe(before)
-  expect(await nested.evaluate((element) => element.scrollTop)).toBeLessThan(nestedBefore)
 
-  await nested.evaluate((element) => (element.scrollTop = 0))
-  await scroller.evaluate((element) => (element.scrollTop = Math.min(300, element.scrollHeight - element.clientHeight)))
+  await nested.evaluate((element) => element.scrollTo({ top: 0, behavior: "instant" }))
+  await expect.poll(() => nested.evaluate((element) => element.scrollTop)).toBe(0)
+  await scroller.evaluate((element) => {
+    element.dispatchEvent(new WheelEvent("wheel", { bubbles: true, cancelable: true, deltaY: -1 }))
+    element.scrollTo({ top: Math.min(300, element.scrollHeight - element.clientHeight), behavior: "instant" })
+  })
+  await expect.poll(() => scroller.evaluate((element) => element.scrollTop)).toBeLessThan(500)
   const boundaryBefore = await scroller.evaluate((element) => element.scrollTop)
   expect(boundaryBefore).toBeGreaterThan(0)
   await nested.press("PageUp")

packages/app/e2e/performance/timeline/provider-memory-benchmark.spec.ts

@@ -0,0 +1,98 @@
+import { benchmark, expect } from "../benchmark"
+import { mockOpenCodeServer } from "../../utils/mock-server"
+import { expectSessionTitle } from "../../utils/waits"
+import { fixture, pageMessages } from "./session-timeline-stress.fixture"
+import { installStressSessionTabs, installTimelineSettings, stressSessionHref } from "./timeline-test-helpers"
+import { waitForStableTimeline } from "./session-tab-switch-probe"
+import type { CatalogUpdated } from "@opencode-ai/client/promise"
+
+benchmark("measures retained renderer memory with a large model catalog", async ({ page, report }) => {
+  benchmark.setTimeout(120_000)
+  const count = Number(process.env.PROVIDER_MEMORY_MODELS ?? 1200)
+  const switches = Number(process.env.PROVIDER_MEMORY_SWITCHES ?? 10)
+  const provider = fixture.provider.all[0]
+  const selected = { ...provider.models["claude-opus-4-6"] }
+  await mockOpenCodeServer(page, {
+    directory: fixture.directory,
+    project: fixture.project,
+    sessions: fixture.sessions,
+    pageMessages,
+    provider: {
+      ...fixture.provider,
+      all: [
+        {
+          ...provider,
+          models: {
+            [selected.id]: selected,
+            ...Object.fromEntries(
+              Array.from({ length: count - 1 }, (_, index) => {
+                const id = `catalog-model-${index}`
+                return [
+                  id,
+                  {
+                    id,
+                    name: `Catalog model ${index}`,
+                    cost: { input: 1, output: 2 },
+                    limit: { context: 200_000, output: 8192 },
+                    variants: { high: { reasoningEffort: "high" } },
+                  },
+                ]
+              }),
+            ),
+          },
+        },
+      ],
+    },
+  })
+  await installTimelineSettings(page)
+  await installStressSessionTabs(page)
+  await page.goto(stressSessionHref(fixture.sourceID))
+  await expectSessionTitle(page, fixture.expected.sourceTitle)
+  await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
+  await expect(page.locator('[data-action="composer-model"]')).toContainText("Claude Opus 4.6")
+  const cdp = await page.context().newCDPSession(page)
+  const samples = []
+  for (let index = 0; index <= switches; index++) {
+    if (index > 0) {
+      const target = index % 2 === 1
+      const id = target ? fixture.targetID : fixture.sourceID
+      await page.locator(`[data-slot="titlebar-tabs"] a[href="${stressSessionHref(id)}"]`).click()
+      await expectSessionTitle(page, target ? fixture.expected.targetTitle : fixture.expected.sourceTitle)
+      await waitForStableTimeline(
+        page,
+        (target ? fixture.expected.targetMessageIDs : fixture.expected.sourceMessageIDs).at(-1)!,
+      )
+      await expect(page.locator('[data-action="composer-model"]')).toContainText("Claude Opus 4.6")
+    }
+    // GC is an explicit retained-heap measurement, not an application optimization or readiness wait.
+    await cdp.send("HeapProfiler.collectGarbage")
+    samples.push({
+      switches: index,
+      heap: await cdp.send("Runtime.getHeapUsage"),
+      dom: await cdp.send("Memory.getDOMCounters"),
+    })
+  }
+  expect(samples).toHaveLength(switches + 1)
+  expect(samples.every((sample) => sample.heap.usedSize > 0)).toBe(true)
+  selected.name = "Updated catalog model"
+  await page.evaluate(
+    (event) => {
+      const host = window as Window & { __mockServerStream?: { push: (events: CatalogUpdated[]) => void } }
+      if (!host.__mockServerStream) throw new Error("Missing fixture event stream")
+      host.__mockServerStream.push([event])
+    },
+    {
+      id: "evt_catalog_refresh",
+      created: Date.now(),
+      type: "catalog.updated",
+      location: { directory: fixture.directory },
+      data: {},
+    } satisfies CatalogUpdated,
+  )
+  await expect(page.locator('[data-action="composer-model"]')).toContainText(selected.name)
+  report(
+    { samples },
+    { models: count, switches, gc: "explicit", scope: "renderer main isolate; not total desktop RAM" },
+  )
+  await cdp.detach()
+})

packages/app/e2e/performance/timeline/session-tab-switch-benchmark.spec.ts

@@ -11,115 +11,73 @@ import {
 } from "./timeline-test-helpers"
 import { measureSessionSwitch, waitForStableTimeline } from "./session-tab-switch-probe"
 
-type Result = Awaited<ReturnType<typeof measureSessionSwitch>>
+const scenarios = [
+  { cached: false, review: false, resized: false },
+  { cached: false, review: true, resized: false },
+  { cached: true, review: false, resized: false },
+  { cached: true, review: true, resized: false },
+  { cached: true, review: true, resized: true },
+]
 
-benchmark(
-  "benchmarks session tab switching with and without the review pane",
-  async ({ browser, report }, testInfo) => {
-    benchmark.setTimeout(360_000)
-    const runs = Number(process.env.SESSION_TAB_SWITCH_RUNS ?? 5)
-    const results = {
-      closed: { cold: [] as Result[], hot: [] as Result[] },
-      open: { cold: [] as Result[], hot: [] as Result[] },
-    }
-    for (const reviewPane of ["closed", "open"] as const) {
-      for (const mode of ["cold", "hot"] as const) {
-        for (let run = 0; run < runs; run++) {
-          results[reviewPane][mode].push(
-            await withBenchmarkPage(
-              browser,
-              `session-tab-switch-${reviewPane}-${mode}-${run}`,
-              (page) => trial(page, mode, reviewPane),
-              testInfo,
-            ),
-          )
+scenarios.forEach((scenario) => {
+  const name = `tab switch: ${scenario.cached ? "cached" : "unmounted"}, review ${scenario.review ? "open" : "closed"}${scenario.resized ? ", resized" : ""}`
+  benchmark(name, async ({ browser, report }, testInfo) => {
+    const result = await withBenchmarkPage(
+      browser,
+      name,
+      async (page) => {
+        await mockStressTimeline(page, { vcsDiff: createReviewDiffs() })
+        await installTimelineSettings(page)
+        await installStressSessionTabs(page)
+        await page.goto(stressSessionHref(fixture.sourceID))
+        await expectSessionTitle(page, fixture.expected.sourceTitle)
+        await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
+        if (scenario.review && !scenario.resized) await openReviewPane(page)
+        if (scenario.cached) {
+          await switchSession(page, fixture.targetID, fixture.expected.targetTitle)
+          const answer = page.locator(`[data-timeline-part-id="${fixture.expected.targetPartIDs.at(-1)}"]`)
+          await expect(answer.locator('[data-component="markdown"]')).toHaveAttribute("data-markdown-ready", "")
+          await expect
+            .poll(() =>
+              answer.evaluate((element) => element.checkVisibility({ checkOpacity: true, checkVisibilityCSS: true })),
+            )
+            .toBe(true)
+          await waitForStableTimeline(page, fixture.expected.targetMessageIDs.at(-1)!)
+          await switchSession(page, fixture.sourceID, fixture.expected.sourceTitle)
         }
-      }
-    }
-    report({ results, summary: summarizeReviewPane(results) }, { runs, reviewDiffs: createReviewDiffs().length })
-  },
-)
+        if (scenario.resized) await openReviewPane(page)
+        await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
 
-async function trial(page: Page, mode: "cold" | "hot", reviewPane: "closed" | "open") {
-  const reviewDiffs = createReviewDiffs()
-  await mockStressTimeline(page, { vcsDiff: reviewDiffs })
-  await installTimelineSettings(page)
-  await installStressSessionTabs(page)
-  if (mode === "hot") {
-    await page.goto(stressSessionHref(fixture.targetID))
-    await expectSessionTitle(page, fixture.expected.targetTitle)
-    await waitForStableTimeline(page, fixture.expected.targetMessageIDs.at(-1)!)
-    await switchSession(page, fixture.sourceID, fixture.expected.sourceTitle)
-  } else {
-    await page.goto(stressSessionHref(fixture.sourceID))
-    await expectSessionTitle(page, fixture.expected.sourceTitle)
-  }
-  await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
-  if (reviewPane === "open") {
-    await openReviewPane(page)
-    await waitForStableTimeline(page, fixture.expected.sourceMessageIDs.at(-1)!)
-  }
-
-  const destinationIDs = fixture.messages[fixture.targetID].map((message) => message.id)
-  const sourceIDs = fixture.messages[fixture.sourceID].map((message) => message.id)
-  const lastID = fixture.expected.targetMessageIDs.at(-1)!
-  const href = stressSessionHref(fixture.targetID)
-  const result = await measureSessionSwitch(page, {
-    destinationIDs,
-    sourceIDs,
-    lastID,
-    href,
-    switch: () => switchSession(page, fixture.targetID, fixture.expected.targetTitle),
-  })
-  return result
-}
-
-function summarize(results: Record<"cold" | "hot", Result[]>) {
-  const stats = (values: (number | null)[]) => {
-    const sorted = values.filter((value): value is number => value !== null).sort((a, b) => a - b)
-    return {
-      min: sorted[0] ?? null,
-      median: sorted[Math.floor(sorted.length / 2)] ?? null,
-      max: sorted.at(-1) ?? null,
-      missing: values.length - sorted.length,
-    }
-  }
-  return Object.fromEntries(
-    Object.entries(results).map(([mode, values]) => [
-      mode,
-      {
-        firstDestinationObservedMs: stats(values.map((value) => value.firstDestinationObservedMs)),
-        firstCorrectObservedMs: stats(values.map((value) => value.firstCorrectObservedMs)),
-        stableObservedMs: stats(values.map((value) => value.stableObservedMs)),
+        return measureSessionSwitch(page, {
+          destinationIDs: fixture.messages[fixture.targetID].map((message) => message.id),
+          sourceIDs: fixture.messages[fixture.sourceID].map((message) => message.id),
+          lastID: fixture.expected.targetMessageIDs.at(-1)!,
+          requiredPartID: fixture.expected.targetPartIDs.at(-1),
+          href: stressSessionHref(fixture.targetID),
+          switch: () => switchSession(page, fixture.targetID, fixture.expected.targetTitle),
+        })
       },
-    ]),
-  )
-}
-
-function summarizeReviewPane(results: Record<"closed" | "open", Record<"cold" | "hot", Result[]>>) {
-  return Object.fromEntries(
-    Object.entries(results).map(([reviewPane, values]) => [
-      reviewPane,
-      summarize(values as Record<"cold" | "hot", Result[]>),
-    ]),
-  )
-}
+      testInfo,
+    )
+    expect(result.unknownSamples).toBe(0)
+    expect(result.wrongDestinationSamples).toBe(0)
+    if (scenario.cached) expect(result.blankSamples).toBe(0)
+    report(result, { ...scenario, inputEvent: "mousedown", requireReadyAnswer: true })
+  })
+})
 
 async function switchSession(page: Page, sessionID: string, title: string) {
-  const href = stressSessionHref(sessionID)
-  const tab = page.locator(`[data-slot="titlebar-tabs"] a[href="${href}"]`).first()
-  await expect(tab).toBeVisible()
+  const tab = page.locator(`[data-slot="titlebar-tabs"] a[href="${stressSessionHref(sessionID)}"]`)
+  await expect(tab).toHaveCount(1)
   await tab.click()
   await expectSessionTitle(page, title)
 }
 
 async function openReviewPane(page: Page) {
   await page.getByRole("button", { name: "Toggle review" }).click()
-  const panel = page.locator("#review-panel")
-  await expect(panel).toBeVisible()
+  await expect(page.locator("#review-panel")).toBeVisible()
   await page.waitForFunction(() => {
-    const panel = document.querySelector<HTMLElement>("#review-panel")
-    const text = panel?.textContent ?? ""
+    const text = document.querySelector("#review-panel")?.textContent ?? ""
     return text.includes("generated-000.ts") && text.includes("+3")
   })
 }

packages/app/e2e/performance/timeline/session-tab-switch-metrics.ts

@@ -20,9 +20,10 @@ export function classifySessionSwitch(samples: SessionSwitchSample[]) {
   const firstCorrect = samples.findIndex(isCorrectDestination)
   const stable = samples.findIndex((_, index) => isStableSessionSwitch(samples.slice(index, index + 3)))
   return {
+    samples,
     firstDestinationObservedMs: samples[firstDestination]?.observedAtMs ?? null,
     firstCorrectObservedMs: samples[firstCorrect]?.observedAtMs ?? null,
-    stableObservedMs: samples[stable + 2]?.observedAtMs ?? null,
+    stableObservedMs: stable < 0 ? null : samples[stable + 2].observedAtMs,
     wrongDestinationSamples: samples
       .slice(firstDestination)
       .filter((sample) => sample.destination.length > 0 && !sample.last).length,

packages/app/e2e/performance/timeline/session-tab-switch-probe.spec.ts

@@ -0,0 +1,67 @@
+import { benchmark, expect } from "../benchmark"
+import { measureSessionSwitch } from "./session-tab-switch-probe"
+import type { SessionSwitchSample } from "./session-tab-switch-metrics"
+
+benchmark("starts at mousedown and excludes hidden or unfinished destination content", async ({ page, report }) => {
+  await page.setContent(`
+    <a href="/session/destination">Destination</a>
+    <div class="scroll-view__viewport" style="height:200px;overflow:auto">
+      <div data-timeline-row="message" data-timeline-key="row" data-message-id="source">
+        <div data-timeline-part-id="answer"><div data-component="markdown">Destination answer</div></div>
+      </div>
+    </div>
+  `)
+  await page.evaluate(() => {
+    document.querySelector("a")!.addEventListener("mousedown", () => {
+      const row = document.querySelector<HTMLElement>("[data-message-id]")!
+      row.dataset.messageId = "destination"
+      row.style.visibility = "hidden"
+    })
+  })
+  const result = await measureSessionSwitch(page, {
+    destinationIDs: ["destination"],
+    sourceIDs: ["source"],
+    lastID: "destination",
+    requiredPartID: "answer",
+    requireBottomAnchor: false,
+    href: "/session/destination",
+    switch: async () => {
+      // No click is dispatched: the probe must observe the event that activates tabs.
+      await page.getByRole("link", { name: "Destination" }).dispatchEvent("mousedown", { button: 0 })
+      await page.waitForFunction(() => {
+        const host = window as Window & { __sessionSwitchProbe?: { samples: SessionSwitchSample[] } }
+        return host.__sessionSwitchProbe?.samples.some((sample) => !sample.hasVisibleRows)
+      })
+      await page.locator("[data-message-id]").evaluate((row) => row.style.removeProperty("visibility"))
+      await page.waitForFunction(() => {
+        const host = window as Window & { __sessionSwitchProbe?: { samples: SessionSwitchSample[] } }
+        return host.__sessionSwitchProbe?.samples.some(
+          (sample) => sample.destination.length > 0 && sample.requiredPartVisible === false,
+        )
+      })
+      const beforeClip = await page.evaluate(() => {
+        const row = document.querySelector<HTMLElement>("[data-timeline-key]")!
+        row.style.cssText = "height:10px;position:relative;overflow:clip"
+        const answer = row.querySelector<HTMLElement>("[data-timeline-part-id]")!
+        answer.style.cssText = "position:absolute;top:30px;width:150px"
+        answer.querySelector('[data-component="markdown"]')!.setAttribute("data-markdown-ready", "")
+        return (
+          (window as Window & { __sessionSwitchProbe?: { samples: SessionSwitchSample[] } }).__sessionSwitchProbe
+            ?.samples.length ?? 0
+        )
+      })
+      await page.waitForFunction((count) => {
+        const host = window as Window & { __sessionSwitchProbe?: { samples: SessionSwitchSample[] } }
+        return host.__sessionSwitchProbe?.samples.slice(count).some((sample) => sample.requiredPartVisible === false)
+      }, beforeClip)
+      await page.locator("[data-timeline-key]").evaluate((row) => {
+        row.style.height = "100px"
+      })
+    },
+  })
+  expect(result.blankSamples).toBeGreaterThan(0)
+  expect(result.firstCorrectObservedMs).not.toBeNull()
+  expect(result.stableObservedMs).not.toBeNull()
+  expect(result.firstCorrectObservedMs).toBeGreaterThan(result.firstDestinationObservedMs!)
+  report(result)
+})

packages/app/e2e/performance/timeline/session-tab-switch-probe.ts

@@ -25,7 +25,7 @@ async function installSessionSwitchProbe(
     let running = true
     const reviewLevels: Record<string, string> = {
       panel: "#review-panel",
-    tabs: '#review-panel [data-component="tabs"]',
+      tabs: '#review-panel [data-component="tabs"]',
       body: '#review-panel [data-slot="session-review-v2-body"]',
       review: '#review-panel [data-component="session-review-v2"]',
       preview: '#review-panel [data-slot="session-review-v2-preview"]',
@@ -37,7 +37,6 @@ async function installSessionSwitchProbe(
       if (!running || started === undefined) return
       setTimeout(() => {
         if (!running || started === undefined) return
-        const observedAtMs = performance.now() - started
         const reviewPanel = document.querySelector<HTMLElement>("#review-panel")
         const reviewFile = reviewPanel?.querySelector('[data-component="file"][data-mode="diff"]')
         const initialReviewFile = initialReviewNodes.file
@@ -63,26 +62,30 @@ async function installSessionSwitchProbe(
         )
         if (root) {
           const view = root.getBoundingClientRect()
-          const visible = [...root.querySelectorAll<HTMLElement>("[data-message-id]")]
-            .filter((element) => {
-              const rect = element.getBoundingClientRect()
-              return rect.bottom > view.top && rect.top < view.bottom
-            })
-            .map((element) => element.dataset.messageId!)
-          const hasVisibleRows = [...root.querySelectorAll<HTMLElement>("[data-timeline-key]")].some((element) => {
+          const inViewport = (element: HTMLElement) => {
+            if (!element.checkVisibility({ checkOpacity: true, checkVisibilityCSS: true })) return false
             const rect = element.getBoundingClientRect()
-            return rect.bottom > view.top && rect.top < view.bottom
-          })
+            const clip = element.closest<HTMLElement>("[data-timeline-key]")?.getBoundingClientRect() ?? view
+            return (
+              Math.min(rect.bottom, clip.bottom, view.bottom) > Math.max(rect.top, clip.top, view.top) &&
+              Math.min(rect.right, clip.right, view.right) > Math.max(rect.left, clip.left, view.left)
+            )
+          }
+          const visible = [...root.querySelectorAll<HTMLElement>("[data-message-id]")]
+            .filter(inViewport)
+            .map((element) => element.dataset.messageId!)
+          const hasVisibleRows = [...root.querySelectorAll<HTMLElement>("[data-timeline-key]")].some(inViewport)
           const requiredPartVisible = requiredPartID
             ? [...root.querySelectorAll<HTMLElement>("[data-timeline-part-id]")].some((element) => {
                 if (element.dataset.timelinePartId !== requiredPartID) return false
-                const rect = element.getBoundingClientRect()
-                return rect.width > 0 && rect.height > 0 && rect.bottom > view.top && rect.top < view.bottom
+                if (!element.textContent?.trim()) return false
+                if (element.querySelector('[data-component="markdown"]:not([data-markdown-ready])')) return false
+                return inViewport(element)
               })
             : undefined
           const spacer = root.querySelector<HTMLElement>('[data-timeline-row="bottom-spacer"]')?.getBoundingClientRect()
           samples.push({
-            observedAtMs,
+            observedAtMs: performance.now() - started,
             destination: visible.filter((id) => destination.has(id)),
             source: visible.filter((id) => source.has(id)),
             hasVisibleRows,
@@ -94,7 +97,7 @@ async function installSessionSwitchProbe(
           })
         } else {
           samples.push({
-            observedAtMs,
+            observedAtMs: performance.now() - started,
             destination: [],
             source: [],
             hasVisibleRows: false,
@@ -107,23 +110,25 @@ async function installSessionSwitchProbe(
         requestAnimationFrame(sample)
       }, 0)
     }
-    document.addEventListener(
-      "click",
-      (event) => {
-        const link = event.target instanceof Element ? event.target.closest("a") : undefined
-        if (link?.getAttribute("href") !== href) return
-        started = performance.now()
-        for (const [name, selector] of Object.entries(reviewLevels)) {
-          initialReviewNodes[name] = document.querySelector(selector)
-        }
-        requestAnimationFrame(sample)
-      },
-      { capture: true, once: true },
-    )
+    const start = (event: MouseEvent) => {
+      if (started !== undefined || event.button !== 0) return
+      const link = event.target instanceof Element ? event.target.closest("a") : undefined
+      if (link?.getAttribute("href") !== href) return
+      started = performance.now()
+      for (const [name, selector] of Object.entries(reviewLevels)) {
+        initialReviewNodes[name] = document.querySelector(selector)
+      }
+      requestAnimationFrame(sample)
+    }
+    // Tabs activate on mousedown; click alone misses the synchronous navigation work.
+    document.addEventListener("mousedown", start, true)
+    document.addEventListener("click", start, true)
     ;(window as Window & { __sessionSwitchProbe?: SessionSwitchProbe }).__sessionSwitchProbe = {
       samples,
       stop: () => {
         running = false
+        document.removeEventListener("mousedown", start, true)
+        document.removeEventListener("click", start, true)
       },
     }
   }, input)

packages/app/e2e/performance/unit/session-tab-switch-metrics.test.ts

@@ -53,6 +53,15 @@ test("reports missing correctness without throwing", () => {
   expect(result.stableObservedMs).toBeNull()
 })
 
+test("does not report stability for only two correct samples", () => {
+  const result = classifySessionSwitch([
+    { observedAtMs: 16, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 },
+    { observedAtMs: 32, destination: ["destination"], source: [], hasVisibleRows: true, last: true, bottomErrorPx: 0 },
+  ])
+  expect(result.firstCorrectObservedMs).toBe(16)
+  expect(result.stableObservedMs).toBeNull()
+})
+
 test("requires an explicitly tracked part to be visible", () => {
   const result = classifySessionSwitch([
     {

packages/app/e2e/regression/cross-server-tab-close.spec.ts

@@ -3,7 +3,7 @@ import { base64Encode } from "@opencode-ai/util/encode"
 import { currentSession } from "../utils/mock-server"
 import { installSseTransport } from "../utils/sse-transport"
 
-const serverA = "http://127.0.0.1:4096"
+const serverA = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
 const serverB = "http://127.0.0.1:4097"
 const sessionA = session("ses_server_a", "C:/server-a", "Server A session")
 const sessionB = session("ses_server_b", "/home/server-b", "Server B session")
@@ -12,17 +12,17 @@ test("closing the active server's last tab opens the remaining server tab", asyn
   const requests: string[] = []
   await mockServers(page, requests)
   await page.addInitScript(
-    ({ serverB, sessionA, sessionB }) => {
+    ({ serverA, serverB, sessionA, sessionB }) => {
       localStorage.setItem("opencode.global.dat:server", JSON.stringify({ list: [serverB] }))
       localStorage.setItem(
         "opencode.window.browser.dat:tabs",
         JSON.stringify([
-          { type: "session", server: "http://127.0.0.1:4096", sessionId: sessionA },
+          { type: "session", server: serverA, sessionId: sessionA },
           { type: "session", server: serverB, sessionId: sessionB },
         ]),
       )
     },
-    { serverB, sessionA: sessionA.id, sessionB: sessionB.id },
+    { serverA, serverB, sessionA: sessionA.id, sessionB: sessionB.id },
   )
 
   const hrefA = `/server/${base64Encode(serverA)}/session/${sessionA.id}`
@@ -55,7 +55,7 @@ function session(id: string, directory: string, title: string) {
 async function mockServers(page: Page, requests: string[]) {
   await installSseTransport(page, { server: serverA })
   await installSseTransport(page, { server: serverB })
-  await page.route("**/*", async (route) => {
+  await page.route("**/api/**", async (route) => {
     const url = new URL(route.request().url())
     if (url.origin !== serverA && url.origin !== serverB) return route.fallback()
     requests.push(url.toString())

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

@@ -0,0 +1,103 @@
+import { expect, test } from "@playwright/test"
+import { base64Encode } from "@opencode-ai/util/encode"
+import { mockOpenCodeServer } from "../utils/mock-server"
+
+const directory = "C:/Projects/extensions-demo"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+const session = {
+  id: "ses_project_extensions",
+  title: "Existing session",
+  directory,
+  projectID: "proj_extensions_demo",
+  time: { created: 1700000000000, updated: 1700000000000 },
+}
+
+test.use({ viewport: { width: 1440, height: 1000 }, colorScheme: "dark" })
+
+test("project Extensions stays inside settings while plugins load", async ({ page }) => {
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: session.projectID,
+      canonical: directory,
+      name: "Extensions demo",
+      vcs: "git",
+      time: session.time,
+      sandboxes: [],
+    },
+    provider: { all: [], connected: [], default: {} },
+    sessions: [session],
+    pageMessages: () => ({ items: [] }),
+  })
+  await page.addInitScript(
+    ({ server, sessionID, directory }) => {
+      localStorage.setItem(
+        "opencode.global.dat:server",
+        JSON.stringify({ projects: { local: [{ worktree: directory, expanded: true }] } }),
+      )
+      localStorage.setItem(
+        "opencode.window.browser.dat:tabs",
+        JSON.stringify([{ type: "session", server, sessionId: sessionID }]),
+      )
+    },
+    { server, sessionID: session.id, directory },
+  )
+  const href = `/server/${base64Encode(server)}/session/${session.id}`
+  await page.goto(href)
+  await expect(page.getByRole("heading", { name: session.title, exact: true })).toBeVisible()
+  await page.keyboard.press("Control+,")
+  const settings = page.getByTestId("settings-screen")
+  await settings.getByRole("tab", { name: "Projects", exact: true }).click()
+  await settings.getByText("Extensions demo", { exact: true }).click()
+  const dialog = page.getByRole("dialog")
+  await expect(dialog.getByRole("textbox", { name: "Name", exact: true })).toBeFocused()
+
+  const globalPlugins = Promise.withResolvers<void>()
+  const projectPlugins = Promise.withResolvers<void>()
+  await page.route(
+    (url) => url.pathname === "/api/plugin",
+    async (route) => {
+      const project = new URL(route.request().url()).searchParams.get("location[directory]")
+      await (project ? projectPlugins : globalPlugins).promise
+      await route.fulfill({
+        json: {
+          location: project ? { directory: project } : {},
+          data: (project ? ["shared-plugin", "project-plugin"] : ["shared-plugin"]).map((id) => ({
+            id,
+            source: { type: "package", package: id },
+            status: "active",
+            tui: false,
+          })),
+        },
+      })
+    },
+  )
+  const requested = page.waitForRequest((request) => {
+    const url = new URL(request.url())
+    return url.pathname === "/api/plugin" && url.searchParams.get("location[directory]") === directory
+  })
+  await dialog.getByRole("tab", { name: "Extensions", exact: true }).click()
+  await requested
+  await expect(page).toHaveURL(href)
+  await expect(dialog.getByRole("heading", { name: "Extensions", exact: true })).toBeVisible()
+  await expect(settings).toBeVisible()
+  await expect(page.getByRole("heading", { name: session.title, exact: true, includeHidden: true })).toBeHidden()
+  await dialog.getByRole("tab", { name: "Plugins", exact: true }).click()
+  await expect(dialog.getByRole("tab", { name: "Plugins", exact: true })).toHaveAttribute("aria-selected", "true")
+
+  globalPlugins.resolve()
+  await dialog.getByRole("tab", { name: "Scripts", exact: true }).click()
+  await expect(dialog.getByRole("heading", { name: "Scripts", exact: true })).toBeVisible()
+  await dialog.getByRole("tab", { name: "Extensions", exact: true }).click()
+  projectPlugins.resolve()
+  await dialog.getByRole("tab", { name: "Plugins", exact: true }).click()
+  await expect(dialog.getByText("project-plugin", { exact: true })).toBeVisible()
+  await dialog.getByRole("button", { name: "Shared with all projects 1", exact: true }).click()
+  await expect(dialog.getByText("shared-plugin", { exact: true })).toBeVisible()
+  await expect(page).toHaveURL(href)
+
+  await page.keyboard.press("Escape")
+  await expect(dialog).toBeHidden()
+  await expect(settings.getByRole("tab", { name: "Projects", exact: true })).toHaveAttribute("aria-selected", "true")
+  await expect(page.getByRole("heading", { name: session.title, exact: true, includeHidden: true })).toBeHidden()
+})

packages/app/e2e/regression/remote-session-settings.spec.ts

@@ -3,7 +3,7 @@ import { expect, test, type Page, type Route } from "@playwright/test"
 import { installSseTransport } from "../utils/sse-transport"
 import { currentSession } from "../utils/mock-server"
 
-const serverA = `http://127.0.0.1:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
+const serverA = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
 const serverB = "http://127.0.0.1:4097"
 const directoryA = "C:/server-a"
 const directoryB = "/home/server-b"
@@ -308,7 +308,7 @@ async function mockServers(
   permissionResponses: PermissionResponse[] = [],
   options: MockServerOptions = {},
 ) {
-  await page.route("**/*", async (route) => {
+  await page.route("**/api/**", async (route) => {
     const url = new URL(route.request().url())
     if (url.origin !== serverA && url.origin !== serverB) return route.fallback()
     const remote = url.origin === serverB

packages/app/e2e/regression/remote-tab-busy.spec.ts

@@ -2,7 +2,7 @@ import { expect, test, type Page, type Route } from "@playwright/test"
 import { base64Encode } from "@opencode-ai/util/encode"
 import { currentSession } from "../utils/mock-server"
 
-const serverA = "http://127.0.0.1:4096"
+const serverA = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
 const serverB = "http://127.0.0.1:4097"
 const sessionA = session("ses_server_a", "C:/server-a", "Server A session")
 const sessionB = session("ses_server_b", "/home/server-b", "Server B session")
@@ -51,7 +51,7 @@ function session(id: string, directory: string, title: string) {
 }
 
 async function mockServers(page: Page) {
-  await page.route("**/*", async (route) => {
+  await page.route("**/api/**", async (route) => {
     const url = new URL(route.request().url())
     if (url.origin !== serverA && url.origin !== serverB) return route.fallback()
     const current = url.origin === serverA ? sessionA : sessionB

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

@@ -1,5 +1,5 @@
 import { expect, test, type Page } from "@playwright/test"
-import type { OpenCodeEvent } from "@opencode-ai/client/promise"
+import type { OpenCodeEvent, SessionMessageInfo } from "@opencode-ai/client/promise"
 import { base64Encode } from "@opencode-ai/util/encode"
 import { mockOpenCodeServer } from "../utils/mock-server"
 import { expectAppVisible } from "../utils/waits"
@@ -18,7 +18,7 @@ type InboxRow = {
   delivery: "steer" | "queue"
 }
 
-function createQueueMock(seed: string[]) {
+function createQueueMock(seed: string[], messages: SessionMessageInfo[] = []) {
   const rows: InboxRow[] = seed.map((text, index) => ({
     id: `inb_seed_${index + 1}`,
     sessionID,
@@ -32,13 +32,16 @@ function createQueueMock(seed: string[]) {
   const changes: { inboxID: string; action: "cancel" | "steer" }[] = []
   const log: string[] = []
   let sequence = 0
-  const emit = (type: OpenCodeEvent["type"], data: OpenCodeEvent["data"]) => {
+  const emit = <Type extends OpenCodeEvent["type"]>(
+    type: Type,
+    data: Extract<OpenCodeEvent, { type: Type }>["data"],
+  ) => {
     sequence += 1
     events.push({
       id: `evt_queue_${sequence}`,
       type,
       created: Date.now(),
-      durable: { aggregateID: sessionID, seq: sequence, version: 1 },
+      durable: { aggregateID: sessionID, seq: sequence, version: type === "session.tool.success" ? 2 : 1 },
       data,
     } as OpenCodeEvent)
   }
@@ -47,6 +50,8 @@ function createQueueMock(seed: string[]) {
     prompts,
     changes,
     log,
+    messages,
+    emit,
     events: () => events.splice(0),
     onPrompt: (input: { sessionID: string; body: Record<string, unknown> }) => {
       prompts.push(input.body)
@@ -126,10 +131,11 @@ async function openSession(page: Page, mock: ReturnType<typeof createQueueMock>,
         directory,
         title: "Session queue regression",
         version: "dev",
+        model: { id: "queue-model", providerID: "opencode" },
         time: { created: 1700000000000, updated: 1700000000000 },
       },
     ],
-    pageMessages: () => ({ items: [] }),
+    pageMessages: () => ({ items: mock.messages }),
     sessionStatus: () => ({ [sessionID]: { type: "running" } }),
     inbox: () => mock.rows.map((row) => ({ ...row, payload: { ...row.payload } })),
     onPrompt: mock.onPrompt,
@@ -227,3 +233,130 @@ test("editing restores the existing draft and replaces only the original queue p
   expect(mock.changes.map((change) => change.action)).toEqual(["cancel", "cancel", "cancel"])
   expect(mock.log[0]).toBe("prompt:queue")
 })
+
+for (const delivery of ["steer", "queue"] as const) {
+  test(`keeps finished tools above a pending ${delivery === "queue" ? "queue-to-steer" : "steer"} follow-up`, async ({
+    page,
+  }, testInfo) => {
+    const model = { id: "queue-model", providerID: "opencode" }
+    const userID = "msg_queue_initial_user"
+    const assistantID = "msg_queue_continued_assistant"
+    const followUp = "U2: Also check the retry path."
+    const mock = createQueueMock(
+      [],
+      [
+        { id: userID, type: "user", text: "U1: Inspect the queue ordering.", time: { created: 1700000000000 } },
+        {
+          id: "msg_queue_initial_assistant",
+          type: "assistant",
+          agent: "build",
+          model,
+          content: [{ type: "text", text: "A1: I will inspect the current implementation." }],
+          finish: "tool-calls",
+          time: { created: 1700000000001, completed: 1700000000002 },
+        },
+      ],
+    )
+    const view = await openSession(page, mock, delivery)
+    const transcript = page.locator("[data-timeline-virtual-content]")
+    const thinking = transcript.locator('[data-timeline-row="Thinking"]')
+    await expect(transcript.getByText("A1: I will inspect the current implementation.", { exact: true })).toBeVisible()
+    await expect(thinking).toBeVisible()
+    await expect(view.input).toBeEditable()
+    await view.input.fill(followUp)
+    await view.input.press("Enter")
+    await expect.poll(() => mock.rows.map((row) => row.delivery)).toEqual([delivery])
+    await expect(view.input).toHaveText("")
+
+    const inboxID = mock.rows[0].id
+    const pending = transcript.locator(`[data-timeline-row="UserMessage"][data-message-id="${inboxID}"]`)
+    if (delivery === "queue") {
+      const queued = view.rows.filter({ hasText: followUp })
+      await expect(queued).toBeVisible()
+      await expect(pending).toHaveCount(0)
+      await queued.hover()
+      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)
+
+    // The next assistant step still belongs to U1: U2 has been admitted, not delivered.
+    mock.emit("session.step.started", { sessionID, assistantMessageID: assistantID, agent: "build", model })
+    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" } },
+    ]) {
+      const ref = { sessionID, assistantMessageID: assistantID, id: tool.id }
+      mock.emit("session.tool.input.started", { ...ref, name: tool.name })
+      mock.emit("session.tool.input.ended", { ...ref, text: JSON.stringify(tool.input) })
+      mock.emit("session.tool.called", { ...ref, input: tool.input, executed: true })
+      mock.emit("session.tool.success", {
+        ...ref,
+        content: [{ type: "text", text: "Inspection complete." }],
+        executed: true,
+      })
+    }
+    mock.emit("session.step.ended", {
+      sessionID,
+      assistantMessageID: assistantID,
+      finish: "tool-calls",
+      cost: 0,
+      tokens: { input: 100, output: 20, reasoning: 0, cache: { read: 0, write: 0 } },
+    })
+    const tools = page.locator('[data-timeline-part-ids="tool_queue_read,tool_queue_grep"]')
+    await expect(tools).toBeVisible()
+    await expect(tools).toContainText(/Used\s*Read, Grep/)
+    await expect(tools.locator('[data-component="tag"]')).toHaveText("2")
+    await expect(thinking).toBeVisible()
+    await expect(pending).toBeVisible()
+    expect(mock.rows.map((row) => ({ id: row.id, delivery: row.delivery }))).toEqual([
+      { id: inboxID, delivery: "steer" },
+    ])
+    await transcript.screenshot({ path: testInfo.outputPath("pending-steer.png") })
+
+    // Soft assertions let delivery run too, even when the pending ordering regresses.
+    await expect
+      .soft(tools.or(thinking).or(pending))
+      .toHaveText([/Used\s*Read, Grep/, /Thinking/, /U2: Also check the retry path\./])
+    await expect
+      .soft(transcript.locator('[data-timeline-row="AssistantPart"]').filter({ has: tools }))
+      .toHaveAttribute("data-message-id", userID)
+    await expect
+      .configure({ soft: true })
+      .poll(async () => {
+        const boxes = await Promise.all([tools.boundingBox(), thinking.boundingBox(), pending.boundingBox()])
+        return (
+          boxes.every((box) => box !== null) &&
+          boxes[0]!.y + boxes[0]!.height <= boxes[1]!.y &&
+          boxes[1]!.y + boxes[1]!.height <= boxes[2]!.y
+        )
+      })
+      .toBe(true)
+
+    mock.rows.splice(0, 1)
+    mock.emit("session.inbox.delivered", { sessionID, inboxID })
+    await expect(thinking).toHaveAttribute("data-message-id", inboxID)
+    await expect(pending).toHaveCount(1)
+    await expect(transcript.locator('[data-timeline-row="UserMessage"]')).toHaveCount(2)
+    await expect(transcript.locator('[data-timeline-row="AssistantPart"]').filter({ has: tools })).toHaveAttribute(
+      "data-message-id",
+      userID,
+    )
+
+    const later = { sessionID, assistantMessageID: "msg_queue_follow_up_assistant" }
+    mock.emit("session.step.started", { ...later, agent: "build", model })
+    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(tools.or(pending).or(response).or(thinking)).toHaveText([
+      /Used\s*Read, Grep/,
+      /U2: Also check the retry path\./,
+      /A3: Now checking the retry path for U2\./,
+      /Thinking/,
+    ])
+  })
+}

packages/app/e2e/regression/session-timeline-notices.spec.ts

@@ -208,6 +208,56 @@ test("navigates from a running subagent card and hides background controls in th
   await expect(page.getByText(/move running work to the background/i)).toHaveCount(0)
 })
 
+for (const name of ["shell", "subagent"] as const) {
+  test(`keeps the background shortcut available for a grouped running ${name}`, async ({ page }) => {
+    const message = assistant(false, true)
+    await setupTimeline(page, {
+      sessionMessages: [
+        user,
+        {
+          ...message,
+          content: [
+            {
+              type: "tool",
+              id: "call_read",
+              name: "read",
+              state: {
+                status: "completed",
+                input: { path: "src/example.ts" },
+                content: [{ type: "text", text: "export const example = true" }],
+                metadata: {},
+              },
+              time: { created: 1, completed: 2 },
+            },
+            {
+              type: "tool",
+              id: "call_running",
+              name,
+              state: {
+                status: "running",
+                input:
+                  name === "shell" ? { command: "echo checking" } : { agent: "general", description: "Inspect code" },
+                metadata: {},
+              },
+              time: { created: 3 },
+            },
+          ],
+        },
+      ],
+    })
+    const group = page.locator('[data-timeline-part-ids="call_read,call_running"]')
+    await expect(group).toBeVisible()
+    await expect(group.locator('[data-slot="collapsible-trigger"]')).toHaveAttribute("aria-expanded", "false")
+    await expect(page.locator('[data-component="session-background-hint"]')).toBeVisible()
+    const request = page.waitForRequest(
+      (request) =>
+        request.method() === "POST" && new URL(request.url()).pathname === `/api/session/${sessionID}/background`,
+    )
+    await page.keyboard.press("Control+b")
+    await request
+  })
+}
+
 test("shows a badge for active background work", async ({ page }) => {
   const childID = "ses_background_child"
   await setupTimeline(page, {

packages/app/e2e/regression/session-timeline-reducer-projection.spec.ts

@@ -44,7 +44,7 @@ test("expands a mixed collapsed tool stack without expanding its individual call
   const group = page.locator(
     '[data-timeline-part-ids="prt_stack_shell_1,prt_stack_explore,prt_stack_patch,prt_stack_shell_2"]',
   )
-  const summary = group.getByRole("button", { name: "Used Shell, Explore, Patch" })
+  const summary = group.getByRole("button", { name: "Used Shell, Agent, Patch" })
   await expect(summary).toHaveAttribute("aria-expanded", "false")
   await expect(summary).toHaveCSS("height", "28px")
   await expect(group.locator('[data-component="tag"]')).toHaveText("4")

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

@@ -0,0 +1,121 @@
+import { expect, test } from "@playwright/test"
+import { mockOpenCodeServer } from "../utils/mock-server"
+
+const directory = "C:/Projects/settings-demo"
+const sandboxes = Array.from({ length: 12 }, (_, index) => `${directory}/workspace-${index + 1}`)
+
+test.use({ viewport: { width: 1440, height: 1000 }, colorScheme: "dark" })
+
+test.beforeEach(async ({ page }) => {
+  await mockOpenCodeServer(page, {
+    directory,
+    project: {
+      id: "proj_settings_demo",
+      canonical: directory,
+      name: "Settings demo",
+      vcs: "git",
+      time: { created: 1700000000000, updated: 1700000000000 },
+      sandboxes,
+    },
+    provider: { all: [], connected: [], default: {} },
+    sessions: sandboxes.map((directory, index) => ({
+      id: `ses_settings_${index + 1}`,
+      title: `Workspace ${index + 1} session`,
+      directory,
+      projectID: "proj_settings_demo",
+      time: { created: 1700000000000, updated: 1700000000000 },
+    })),
+    pageMessages: () => ({ items: [] }),
+  })
+  await page.goto("/")
+  await page.getByRole("button", { name: "Settings", exact: true }).click()
+  await expect(page.getByTestId("settings-screen").getByRole("tab", { name: "Preferences" })).toBeVisible()
+})
+
+test("workspaces opens without waiting for inventory or sessions", async ({ page }) => {
+  const inventory = Promise.withResolvers<void>()
+  const sessions = Promise.withResolvers<void>()
+  await page.route("**/api/worktree/*", async (route) => {
+    await inventory.promise
+    await route.fallback()
+  })
+  await page.route("**/api/session?*", async (route) => {
+    if (new URL(route.request().url()).searchParams.has("directory")) await sessions.promise
+    await route.fallback()
+  })
+  const settings = page.getByTestId("settings-screen")
+  const requested = page.waitForRequest((request) => new URL(request.url()).pathname.startsWith("/api/worktree/"))
+  await settings.getByRole("tab", { name: "Workspaces", exact: true }).click()
+  await requested
+  await expect(settings.getByRole("heading", { name: "Workspaces", exact: true })).toBeVisible()
+  await expect(settings.getByRole("button", { name: "Back to app" })).toBeVisible()
+  await expect(settings.getByText("No workspaces", { exact: true })).toHaveCount(0)
+
+  inventory.resolve()
+  await expect(settings.getByText(sandboxes[0], { exact: true })).toBeVisible()
+  await expect(settings.getByText("12 workspaces", { exact: true })).toBeVisible()
+  sessions.resolve()
+  await expect(settings.getByText("Workspace 1 session", { exact: true })).toBeVisible()
+
+  const refresh = Promise.withResolvers<void>()
+  await page.route("**/api/worktree/*", async (route) => {
+    await refresh.promise
+    await route.fallback()
+  })
+  await settings.getByRole("tab", { name: "Preferences", exact: true }).click()
+  await settings.getByRole("tab", { name: "Workspaces", exact: true }).click()
+  await expect(settings.getByText("Workspace 1 session", { exact: true })).toBeVisible()
+  refresh.resolve()
+})
+
+test("extensions opens without waiting for MCPs or plugins", async ({ page }) => {
+  const mcps = Promise.withResolvers<void>()
+  const plugins = Promise.withResolvers<void>()
+  await page.route("**/api/mcp", async (route) => {
+    await mcps.promise
+    await route.fulfill({
+      json: { location: { directory }, data: [{ name: "demo-mcp", status: { status: "connected" } }] },
+    })
+  })
+  await page.route("**/api/plugin", async (route) => {
+    await plugins.promise
+    await route.fulfill({
+      json: {
+        location: { directory },
+        data: [
+          { id: "demo-plugin", source: { type: "package", package: "demo-plugin" }, status: "active", tui: false },
+        ],
+      },
+    })
+  })
+  const settings = page.getByTestId("settings-screen")
+  const requested = page.waitForRequest((request) => new URL(request.url()).pathname === "/api/mcp")
+  await settings.getByRole("tab", { name: "Extensions", exact: true }).click()
+  await requested
+  await expect(settings.getByRole("heading", { name: "Extensions", exact: true })).toBeVisible()
+  await expect(settings.getByRole("button", { name: "Back to app" })).toBeVisible()
+  await settings.getByRole("tab", { name: "Plugins", exact: true }).click()
+  await expect(settings.getByRole("tab", { name: "Plugins", exact: true })).toHaveAttribute("aria-selected", "true")
+  plugins.resolve()
+  await expect(settings.getByText("demo-plugin", { exact: true })).toBeVisible()
+  mcps.resolve()
+  await settings.getByRole("tab", { name: "MCPs", exact: true }).click()
+  await expect(settings.getByRole("switch", { name: "demo-mcp" })).toBeChecked()
+})
+
+test("workspace inventory uses the settings panel scroll area", async ({ page }) => {
+  const settings = page.getByTestId("settings-screen")
+  await settings.getByRole("tab", { name: "Workspaces", exact: true }).click()
+  await expect(settings.getByText("Workspace 1 session", { exact: true })).toBeVisible()
+  const list = settings.locator('[data-component="settings-list"]')
+  await expect(list).toHaveCSS("max-height", "none")
+  await expect(list).toHaveCSS("overflow-y", "visible")
+  await settings.getByText("Workspace 12 session", { exact: true }).scrollIntoViewIfNeeded()
+  await expect(settings.getByText("Workspace 12 session", { exact: true })).toBeInViewport()
+  await expect(settings.getByRole("button", { name: "Back to app" })).toBeInViewport()
+  await page.setViewportSize({ width: 390, height: 844 })
+  await expect(list).toHaveCSS("max-height", "none")
+  await expect(list).toHaveCSS("overflow-y", "visible")
+  await settings.getByText("Workspace 12 session", { exact: true }).scrollIntoViewIfNeeded()
+  await expect(settings.getByText("Workspace 12 session", { exact: true })).toBeInViewport()
+})

packages/app/e2e/regression/subagent-child-navigation.spec.ts

@@ -52,7 +52,7 @@ test("shows parent lineage while the child timeline loads", async ({ page }) =>
 
   await page.goto(sessionHref(parentID))
   await expectSessionTitle(page, parentTitle)
-  await page.getByRole("button", { name: "Used Explore" }).click()
+  await page.getByRole("button", { name: "Used Agent" }).click()
   await page.locator(`a[href="${sessionHref(childID)}"]`).click()
   await Promise.all([requested.promise, expect(page).toHaveURL(sessionHref(childID))])
   await Promise.all([
@@ -77,7 +77,7 @@ test("keeps the parent visible while the child session resolves", async ({ page
   await page.goto(sessionHref(parentID))
   await expectSessionTitle(page, parentTitle)
 
-  await page.getByRole("button", { name: "Used Explore" }).click()
+  await page.getByRole("button", { name: "Used Agent" }).click()
   await page.locator(`a[href="${sessionHref(childID)}"]`).click()
   await requested.promise
   await Promise.all([expect(page).toHaveURL(sessionHref(parentID)), expectSessionTitle(page, parentTitle)]).finally(
@@ -195,7 +195,7 @@ async function setup(page: Page, events?: () => OpenCodeEvent[]) {
 async function openChildFromParent(page: Page) {
   await page.goto(sessionHref(parentID))
   await expectSessionTitle(page, parentTitle)
-  await page.getByRole("button", { name: "Used Explore" }).click()
+  await page.getByRole("button", { name: "Used Agent" }).click()
 
   const card = page.locator(`a[href="${sessionHref(childID)}"]`)
   await expect(card).toBeVisible()

packages/app/e2e/regression/tab-navigate-mousedown.spec.ts

@@ -2,7 +2,7 @@ import { expect, test, type Page, type Route } from "@playwright/test"
 import { base64Encode } from "@opencode-ai/util/encode"
 import { currentSession } from "../utils/mock-server"
 
-const server = "http://127.0.0.1:4096"
+const server = `http://${process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"}:${process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"}`
 const sessionA = session("ses_tab_a", "Tab A session")
 const sessionB = session("ses_tab_b", "Tab B session")
 const sessionC = session("ses_tab_c", "Tab C session")
@@ -238,7 +238,7 @@ function session(id: string, title: string) {
 
 async function mockServer(page: Page) {
   const sessions = [sessionA, sessionB, sessionC]
-  await page.route("**/*", async (route) => {
+  await page.route("**/api/**", async (route) => {
     const url = new URL(route.request().url())
     if (url.origin !== server) return route.fallback()
     if (url.pathname === `/api/session/${unresolvedSessionID}`) return new Promise(() => {})

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

@@ -144,12 +144,14 @@ export async function mockOpenCodeServer(page: Page, config: MockServerConfig) {
   )
   page.on("close", () => void transport.dispose())
 
-  await page.route("**/*", async (route) => {
+  await page.route("**/api/**", async (route) => {
     const url = new URL(route.request().url())
     const appPort = new URL(
       process.env.PLAYWRIGHT_BASE_URL ?? `http://127.0.0.1:${process.env.PLAYWRIGHT_PORT ?? "3000"}`,
     ).port
     if (url.origin !== server && url.port !== appPort) return route.fallback()
+    // Production serves the UI and API from one origin; leave app assets to Vite.
+    if (!url.pathname.startsWith("/api/")) return route.fallback()
     if (route.request().method() === "OPTIONS") {
       return route.fulfill({ status: 204, headers: corsHeaders })
     }

packages/app/package.json

@@ -25,6 +25,7 @@
     "test:browser": "bun test --conditions=browser --preload ./happydom.ts ./test-browser",
     "test:unit:watch": "bun test --conditions=solid --watch --preload ./happydom.ts ./src",
     "test:e2e": "playwright test",
+    "test:e2e:built": "PLAYWRIGHT_BUILD=1 playwright test",
     "test:e2e:local": "playwright test",
     "test:components": "playwright test --config playwright.components.config.ts",
     "test:components:ui": "playwright test --config playwright.components.config.ts --ui",

packages/app/playwright.config.ts

@@ -2,10 +2,19 @@ import { defineConfig, devices } from "@playwright/test"
 
 const port = Number(process.env.PLAYWRIGHT_PORT ?? 3000)
 const baseURL = process.env.PLAYWRIGHT_BASE_URL ?? `http://127.0.0.1:${port}`
+const url = new URL(baseURL)
+if (url.protocol !== "http:") throw new Error("E2E fixtures require an http:// app URL")
+const built = !!process.env.CI || process.env.PLAYWRIGHT_BUILD === "1"
+// Production connects to its own origin, so fixture URLs must match the preview server.
+if (built) {
+  process.env.PLAYWRIGHT_SERVER_HOST = url.hostname
+  process.env.PLAYWRIGHT_SERVER_PORT = url.port || "80"
+}
 const serverHost = process.env.PLAYWRIGHT_SERVER_HOST ?? "127.0.0.1"
 const serverPort = process.env.PLAYWRIGHT_SERVER_PORT ?? "4096"
-const command = `bun run dev -- --host 0.0.0.0 --port ${port}`
-const reuse = !process.env.CI
+const command = built
+  ? `bun run build && bun run serve -- --host 127.0.0.1 --port ${port} --strictPort`
+  : `bun run dev -- --host 127.0.0.1 --port ${port} --strictPort`
 const workers = Number(process.env.PLAYWRIGHT_WORKERS ?? (process.env.CI ? 5 : 0)) || undefined
 export default defineConfig({
   testDir: "./e2e",
@@ -23,16 +32,18 @@ export default defineConfig({
   retries: process.env.CI ? 2 : 0,
   workers,
   reporter: [["html", { outputFolder: "e2e/playwright-report", open: "never" }], ["line"]],
-  webServer: {
-    command,
-    url: baseURL,
-    reuseExistingServer: reuse,
-    timeout: 120_000,
-    env: {
-      VITE_OPENCODE_SERVER_HOST: serverHost,
-      VITE_OPENCODE_SERVER_PORT: serverPort,
-    },
-  },
+  webServer: process.env.PLAYWRIGHT_BASE_URL
+    ? undefined
+    : {
+        command,
+        url: baseURL,
+        reuseExistingServer: !built,
+        timeout: 120_000,
+        env: {
+          VITE_OPENCODE_SERVER_HOST: serverHost,
+          VITE_OPENCODE_SERVER_PORT: serverPort,
+        },
+      },
   use: {
     baseURL,
     trace: "on-first-retry",

packages/app/src/home/route.tsx

@@ -17,7 +17,7 @@ export function Home() {
   return (
     <div
       class={`
-        m-2 min-h-0 flex-1 self-stretch overflow-hidden rounded-[10px]
+        mx-2 mb-2 mt-[var(--shell-top-inset,8px)] min-h-0 flex-1 self-stretch overflow-hidden rounded-[10px]
         bg-v2-background-bg-base shadow-[var(--v2-elevation-raised)]
       `}
     >

packages/app/src/new-session/screen.tsx

@@ -73,7 +73,7 @@ export default function NewSessionPage(props: { draftId: string }) {
     <div class="relative size-full overflow-hidden flex flex-col">
       {suspendUntilPromptReady()}
       <NewSessionStatus visible={settings.visibility.status()} />
-      <div class="flex-1 min-h-0 flex flex-col gap-2 p-2">
+      <div class="flex-1 min-h-0 flex flex-col gap-2 px-2 pb-2 pt-[var(--shell-top-inset,8px)]">
         <NewSessionView composer={model} project={project} workspace={workspace} />
       </div>
     </div>

packages/app/src/runtime/server/global-sync/utils.ts

@@ -1,10 +1,16 @@
 import type { AgentListOutput, ModelListOutput, ProviderListOutput } from "@opencode-ai/client/promise"
 import type { Agent, Project, Provider, ProviderListResponse } from "@/runtime/server/types"
 import type { Project as CurrentProject } from "@opencode-ai/client/promise"
+import { unwrap } from "solid-js/store"
 export { pathKey as directoryKey, type PathKey as DirectoryKey } from "@/workspaces/path-key"
 
 export const cmp = (a: string, b: string) => (a < b ? -1 : a > b ? 1 : 0)
 
+const providerCatalogs = new WeakMap<
+  ProviderListOutput["data"],
+  WeakMap<ModelListOutput["data"], ProviderListResponse>
+>()
+
 export function normalizeAgentList(input: AgentListOutput["data"] | Agent[]): Agent[] {
   if (input.every((agent) => !("request" in agent))) return input as Agent[]
   return (input as AgentListOutput["data"]).map((agent) => ({
@@ -30,12 +36,16 @@ export function normalizeAgentList(input: AgentListOutput["data"] | Agent[]): Ag
 }
 
 export function normalizeProviderList(
-  providers: ProviderListOutput["data"] | ProviderListResponse,
-  models?: ModelListOutput["data"],
+  input: ProviderListOutput["data"] | ProviderListResponse,
+  catalog?: ModelListOutput["data"],
 ): ProviderListResponse {
-  if (!Array.isArray(providers)) {
-    return providers
-  }
+  if (!Array.isArray(input)) return input
+  // Client sync replaces whole catalog lists. Track those reads at the caller,
+  // not every model field, and share conversions without retaining old lists.
+  const providers = unwrap(input)
+  const models = unwrap(catalog)
+  const cached = models && providerCatalogs.get(providers)?.get(models)
+  if (cached) return cached
   const all = new Map<string, Provider>()
 
   for (const provider of providers) {
@@ -101,7 +111,7 @@ export function normalizeProviderList(
     }
   }
 
-  return {
+  const result = {
     all,
     connected: providers.map((provider) => provider.id),
     default: Object.fromEntries(
@@ -111,6 +121,12 @@ export function normalizeProviderList(
       }),
     ),
   }
+  if (models) {
+    const cache = providerCatalogs.get(providers) ?? new WeakMap<ModelListOutput["data"], ProviderListResponse>()
+    cache.set(models, result)
+    providerCatalogs.set(providers, cache)
+  }
+  return result
 }
 
 export function normalizeProjectInfo(project: Project | CurrentProject): Project {

packages/app/src/session/route.tsx

@@ -44,9 +44,7 @@ function TargetSessionSettingsCommand() {
   return null
 }
 
-function SessionRouteErrorBoundary(
-  props: ParentProps<{ sessionID?: string; serverKey?: ServerConnection.Key }>,
-) {
+function SessionRouteErrorBoundary(props: ParentProps<{ sessionID?: string; serverKey?: ServerConnection.Key }>) {
   return (
     <ErrorBoundary
       fallback={(error) => (
@@ -106,7 +104,7 @@ function PendingSessionState(props: { sessionID: string }) {
 
 function SessionStatePanel(props: ParentProps) {
   return (
-    <div class="flex min-h-0 flex-1 p-2">
+    <div class="flex min-h-0 flex-1 px-2 pb-2 pt-[var(--shell-top-inset,8px)]">
       <SessionPanelFrame raised>{props.children}</SessionPanelFrame>
     </div>
   )

packages/app/src/session/screen-layout.ts

@@ -8,7 +8,7 @@ import type { SessionModel } from "./model"
 import { sessionPanelLayout } from "./session-panel-layout"
 import { clampSessionPanelWidth, sessionPanelWidthMax } from "./session-panel-width"
 
-export function createSessionScreenLayout(session: SessionModel, serverScope: string) {
+export function createSessionScreenLayout(session: SessionModel) {
   const layout = useLayout()
   const settings = useSettings()
   const size = createSizing()
@@ -92,7 +92,6 @@ export function createSessionScreenLayout(session: SessionModel, serverScope: st
     centered: createMemo(() => session.isDesktop()),
     files: { open: fileTreeOpen },
     panel: {
-      key: createMemo(() => (session.identity.params.id ? `${serverScope}\0${session.identity.params.id}` : undefined)),
       max: panelMax,
       ref: (element: HTMLDivElement) => {
         row = element

packages/app/src/session/screen.tsx

@@ -4,7 +4,6 @@ import createPresence from "solid-presence"
 import { ResizeHandle } from "@opencode-ai/ui/resize-handle"
 import { SessionHeader } from "@/session/header/session-header"
 import { useLayout } from "@/shell/state/layout"
-import { useServerSDK } from "@/runtime/server/client"
 import { useSettings } from "@/settings/model"
 import { MessageTimeline } from "@/session/timeline/message-timeline"
 import type { SessionModel } from "@/session/model"
@@ -23,10 +22,9 @@ import { SessionIdentityHeader } from "./session-identity-header"
 export function SessionScreen(props: { session: SessionModel }) {
   const session = props.session
   const layout = useLayout()
-  const serverSDK = useServerSDK()
   const settings = useSettings()
   const isDesktop = session.isDesktop
-  const screen = createSessionScreenLayout(session, serverSDK.scope)
+  const screen = createSessionScreenLayout(session)
   const timeline = createSessionTimelineInteraction(session)
   const messagesReady = timeline.ready
   const [store, setStore] = createStore({
@@ -164,7 +162,7 @@ export function SessionScreen(props: { session: SessionModel }) {
   return (
     <>
       <SessionHeader />
-      <div class="flex-1 min-h-0 flex flex-col gap-2 p-2">
+      <div class="flex-1 min-h-0 flex flex-col gap-2 px-2 pb-2 pt-[var(--shell-top-inset,8px)]">
         <div ref={screen.panel.ref} class="relative flex-1 min-h-0 flex flex-col md:flex-row gap-2">
           <div
             classList={{
@@ -177,12 +175,10 @@ export function SessionScreen(props: { session: SessionModel }) {
               width: screen.panel.width(),
             }}
           >
-            <Show when={screen.panel.key()} keyed>
-              {(_) => (
-                <SessionPanelFrame raised={!!session.identity.params.id}>
-                  <ErrorBoundary fallback={sessionErrorFallback}>{sessionPanelContent()}</ErrorBoundary>
-                </SessionPanelFrame>
-              )}
+            <Show when={!!session.identity.params.id}>
+              <SessionPanelFrame raised>
+                <ErrorBoundary fallback={sessionErrorFallback}>{sessionPanelContent()}</ErrorBoundary>
+              </SessionPanelFrame>
             </Show>
 
             <Show when={screen.panel.resizable()}>

packages/app/src/session/session-frame.tsx

@@ -2,7 +2,10 @@ import type { ParentProps } from "solid-js"
 
 export function SessionRouteFrame(props: ParentProps<{ padded?: boolean }>) {
   return (
-    <div class="relative flex size-full flex-col overflow-hidden" classList={{ "p-2": props.padded }}>
+    <div
+      class="relative flex size-full flex-col overflow-hidden"
+      classList={{ "px-2 pb-2 pt-[var(--shell-top-inset,8px)]": props.padded }}
+    >
       {props.children}
     </div>
   )

packages/app/src/session/timeline/controller-projection.test.ts

@@ -1,6 +1,8 @@
 import { describe, expect, test } from "bun:test"
 import type { SessionInboxInfo, SessionMessageInfo } from "@opencode-ai/client/promise"
+import { createRoot } from "solid-js"
 import { applyTimelineMessageHandoff, visibleTimelineMessages } from "./controller-projection"
+import { createTimelineProjection } from "./projection"
 
 const messages = [
   { id: "msg_1", type: "user", text: "first", time: { created: 1 } },
@@ -17,6 +19,105 @@ const messages = [
 ] satisfies SessionMessageInfo[]
 
 describe("visibleTimelineMessages", () => {
+  const steer = {
+    id: "msg_3",
+    sessionID: "ses_1",
+    timeCreated: 3,
+    type: "user",
+    delivery: "steer",
+    payload: { text: "queued" },
+  } satisfies SessionInboxInfo
+  const work = {
+    id: "msg_5",
+    type: "assistant",
+    agent: "build",
+    model: { id: "model", providerID: "provider" },
+    content: [
+      {
+        type: "tool",
+        id: "tool_read",
+        name: "read",
+        state: {
+          status: "completed",
+          input: { filePath: "src/example.ts" },
+          content: [{ type: "text", text: "export const example = true" }],
+          metadata: {},
+        },
+        time: { created: 5, completed: 6 },
+      },
+    ],
+    time: { created: 5, completed: 6 },
+  } satisfies SessionMessageInfo
+
+  test("keeps work and thinking above an undelivered steer", () => {
+    const source = [...messages.slice(0, 3), work]
+    const visible = visibleTimelineMessages(source, [steer])
+    expect(visible.map((message) => message.id)).toEqual(["msg_1", "msg_2", "msg_5", "msg_3"])
+    expect(source.map((message) => message.id)).toEqual(["msg_1", "msg_2", "msg_3", "msg_5"])
+    expect(visible[2]).toBe(work)
+
+    createRoot((dispose) => {
+      const projection = createTimelineProjection({
+        sessionMessages: () => visible,
+        status: () => ({ type: "busy" }),
+        showReasoningSummaries: () => false,
+        shellToolDefaultOpen: () => false,
+        editToolDefaultOpen: () => false,
+        pendingUserMessageIDs: () => new Set([steer.id]),
+      })
+      expect(projection.activeMessageID()).toBe("msg_1")
+      expect(projection.rows().map((row) => [row._tag, row.userMessageID])).toEqual([
+        ["UserMessage", "msg_1"],
+        ["AssistantPart", "msg_1"],
+        ["Thinking", "msg_1"],
+        ["TurnGap", "msg_3"],
+        ["UserMessage", "msg_3"],
+      ])
+      expect(
+        projection
+          .assistantMessagesByParent()
+          .get("msg_1")
+          ?.map((message) => message.id),
+      ).toEqual(["msg_2", "msg_5"])
+      expect(projection.assistantMessagesByParent().has(steer.id)).toBe(false)
+      dispose()
+    })
+  })
+
+  test("moves a queued input after existing work when changed to steer", () => {
+    const source = [...messages.slice(0, 3), work]
+    expect(visibleTimelineMessages(source, [{ ...steer, delivery: "queue" }]).map((message) => message.id)).toEqual([
+      "msg_1",
+      "msg_2",
+      "msg_5",
+    ])
+    expect(visibleTimelineMessages(source, [steer]).map((message) => message.id)).toEqual([
+      "msg_1",
+      "msg_2",
+      "msg_5",
+      "msg_3",
+    ])
+    const delivered = [messages[0], messages[1], work, messages[2]]
+    expect(visibleTimelineMessages(delivered, [])).toBe(delivered)
+  })
+
+  test("preserves steer order and excludes reverted steers", () => {
+    const source = [...messages, work]
+    const pending = [steer, { ...steer, id: "msg_4" }]
+    expect(visibleTimelineMessages(source, pending).map((message) => message.id)).toEqual([
+      "msg_1",
+      "msg_2",
+      "msg_5",
+      "msg_3",
+      "msg_4",
+    ])
+    expect(visibleTimelineMessages(source, pending, "msg_4").map((message) => message.id)).toEqual([
+      "msg_1",
+      "msg_2",
+      "msg_3",
+    ])
+  })
+
   test("hides queued inputs until delivery", () => {
     const pending = [
       {

packages/app/src/session/timeline/controller-projection.ts

@@ -17,8 +17,19 @@ export function visibleTimelineMessages(
   const queued = new Set(
     pending.flatMap((item) => (item.type === "user" && item.delivery === "queue" ? [item.id] : [])),
   )
-  if (queued.size === 0 && !revertMessageID) return messages
-  return messages.filter((message) => !queued.has(message.id) && (!revertMessageID || message.id < revertMessageID))
+  const steers = new Set(
+    pending.flatMap((item) => (item.type === "user" && item.delivery === "steer" ? [item.id] : [])),
+  )
+  if (queued.size === 0 && steers.size === 0 && !revertMessageID) return messages
+  const visible = messages.filter(
+    (message) => !queued.has(message.id) && (!revertMessageID || message.id < revertMessageID),
+  )
+  if (steers.size === 0) return visible
+  // Pending steers do not own assistant work until they are delivered.
+  return [
+    ...visible.filter((message) => !steers.has(message.id)),
+    ...visible.filter((message) => steers.has(message.id)),
+  ]
 }
 
 export function timelineChildTitle(input: {

packages/app/src/session/timeline/message-timeline.tsx

@@ -349,8 +349,7 @@ function MessageTimelineView(
       : projects.find((item) => containsDirectory(item.worktree, sessionDirectory()))
   })
   const workspaceSession = createMemo(() => isWorkspaceDirectory(project(), sessionDirectory()))
-  const showProjectIcon = () =>
-    import.meta.env.VITE_OPENCODE_CHANNEL !== "prod" && settings.general.showProjectIcon()
+  const showProjectIcon = () => import.meta.env.VITE_OPENCODE_CHANNEL !== "prod" && settings.general.showProjectIcon()
   const avatarProject = createMemo(() => {
     if (!showProjectIcon()) return
     const session = props.session.data.info()
@@ -469,19 +468,18 @@ function MessageTimelineView(
   })
   const backgroundHintPartID = createMemo(() => {
     const blocking = new Set(props.background.blocking().map((task) => task.partID))
-    const row = projection
+    if (blocking.size === 0) return
+    return projection
       .rows()
-      .findLast(
-        (row) => row._tag === "AssistantPart" && row.group.type === "part" && blocking.has(row.group.ref.partID),
+      .flatMap((row) =>
+        row._tag === "AssistantPart" ? (row.group.type === "part" ? [row.group.ref] : row.group.refs) : [],
       )
-    if (row?._tag !== "AssistantPart" || row.group.type !== "part") return
-    return row.group.ref.partID
+      .findLast((ref) => blocking.has(ref.partID))?.partID
   })
   const [backgroundHintRef, setBackgroundHintRef] = createSignal<HTMLDivElement>()
   const backgroundHintPresence = createAnimatedPresence(backgroundHintPartID, () => backgroundHintRef() ?? null)
   return (
     <VirtualizedTimeline
-      workspaceSession={workspaceSession}
       bottomSpacer={
         <Show when={backgroundHintPresence.present()}>
           <div

packages/app/src/session/timeline/virtualizer.tsx

@@ -1,8 +1,15 @@
-import { createVirtualizer, defaultRangeExtractor, elementScroll, type VirtualItem } from "@tanstack/solid-virtual"
+import {
+  createVirtualizer,
+  defaultRangeExtractor,
+  elementScroll,
+  type Range,
+  type VirtualItem,
+} from "@tanstack/solid-virtual"
 import { isScrollKeyTarget, scrollKey, scrollKeyOwner, ScrollView } from "@opencode-ai/ui/scroll-view"
 import { TimelineRow } from "@opencode-ai/session-ui/timeline/projection"
 import { useLanguage } from "@/runtime/i18n/language"
 import {
+  batch,
   createEffect,
   createMemo,
   createSignal,
@@ -55,7 +62,6 @@ type Input = {
 type ViewProps = {
   header: JSX.Element
   bottomSpacer?: JSX.Element
-  workspaceSession: Accessor<boolean>
   deferred: (row: TimelineRow.TimelineRow) => boolean
   renderRow: (row: Accessor<TimelineRow.TimelineRow>, onSizeChange?: () => void) => JSX.Element
 }
@@ -68,11 +74,12 @@ export function createTimelineVirtualizer(input: Input) {
   const coldBottomMount = !initialMeasurements?.length && input.pinned()
   const [listRoot, setListRoot] = createSignal<HTMLDivElement>()
   const [toolOpen, setToolOpen] = createStore<Record<string, boolean | undefined>>(cached?.toolOpen ?? {})
-  const [renderOverscan, setRenderOverscan] = createSignal(initialMeasurements?.length || coldBottomMount ? 6 : 20)
+  const [overscan, setOverscan] = createSignal(2)
   const rows = input.projection.rows
   const rowByKey = input.projection.rowByKey
   const knownKeys = new Set(rows().map(TimelineRow.key))
   const addedKeys = new Set<string>()
+  const measuredElements = new WeakSet<Element>()
   let touchStart: number | undefined
   let pointerHeld = false
   let maxScroll = 0
@@ -92,14 +99,19 @@ export function createTimelineVirtualizer(input: Input) {
     initialOffset: () => (input.pinned() ? Number.MAX_SAFE_INTEGER : 0),
     initialMeasurementsCache: initialMeasurements,
     estimateSize: () => fallbackItemSize,
-    // Do not replace this with TanStack's default measurer: without a ResizeObserver entry,
-    // it returns the cached height instead of reading the element (TanStack/virtual#1183).
-    // Restored sessions, deferred tools, and rewrapped content can then keep stale heights;
-    // our fixed-height, overflow-clipped rows will hide their content. Keep observer entries
-    // on the cheap precomputed path, but make explicit measurements read the real height.
-    measureElement: (element, entry) => {
+    // A newly observed element gets a real ResizeObserver box before paint. Reuse
+    // its snapshot on attachment, but later explicit measurements must read layout
+    // so deferred/rewrapped content cannot keep stale, clipped heights (TanStack/virtual#1183).
+    measureElement: (element, entry, instance) => {
+      const initial = !measuredElements.has(element)
+      measuredElements.add(element)
       const box = entry?.borderBoxSize[0]
-      return box ? Math.round(box.blockSize) : element.offsetHeight
+      if (box) return Math.round(box.blockSize)
+      if (initial) {
+        const size = instance.itemSizeCache.get(instance.options.getItemKey(instance.indexFromElement(element)))
+        if (size !== undefined) return size
+      }
+      return element.offsetHeight
     },
     scrollToFn: (offset, options, instance) => {
       if (virtualContent) virtualContent.style.height = `${instance.getTotalSize()}px`
@@ -131,41 +143,59 @@ export function createTimelineVirtualizer(input: Input) {
       return input.showHeader() ? 64 : 0
     },
     paddingEnd: 64,
-    rangeExtractor: (range) => {
+    get rangeExtractor() {
       const id = input.projection.activeMessageID()
       const active = id ? (input.projection.messageLastRowIndex().get(id) ?? -1) : -1
-      const indexes = defaultRangeExtractor({ ...range, overscan: renderOverscan() })
-      return filterVirtualIndexes(
-        [...new Set([...indexes, ...(active < 0 ? [] : [active])])].sort((a, b) => a - b),
-        range.count,
-      )
+      const buffer = overscan()
+      return (range: Range) => {
+        const indexes = defaultRangeExtractor({ ...range, overscan: buffer })
+        return filterVirtualIndexes(
+          [...new Set([...indexes, ...(active < 0 ? [] : [active])])].sort((a, b) => a - b),
+          range.count,
+        )
+      }
     },
   })
   const resizeItem = virtualizer.resizeItem
-  let resizeAnchorScheduled = false
-  // Rows measure asynchronously, so the last row can still hold its estimate when TanStack
-  // reconciles the end. Coalesce one correction per measurement batch, before paint.
-  const anchorResizedBottom = () => {
-    if (resizeAnchorScheduled) return
-    resizeAnchorScheduled = true
+  const pendingSizes = new Map<number, { key: string; size: number }>()
+  let resizeScheduled = false
+  // Read the whole measurement delivery before committing reactive row sizes.
+  // Otherwise each row can render and force layout before the next is measured.
+  virtualizer.resizeItem = (index, size) => {
+    const row = rows()[index]
+    if (!row) return
+    const key = TimelineRow.key(row)
+    if (virtualizer.itemSizeCache.get(key) === size) {
+      pendingSizes.delete(index)
+      return
+    }
+    pendingSizes.set(index, { key, size })
+    if (resizeScheduled) return
+    resizeScheduled = true
     queueMicrotask(() => {
-      resizeAnchorScheduled = false
+      resizeScheduled = false
+      if (!pendingSizes.size) return
+      const sizes = [...pendingSizes]
+      pendingSizes.clear()
+      batch(() => {
+        sizes.forEach(([index, value]) => {
+          const row = rows()[index]
+          if (row && TimelineRow.key(row) === value.key) resizeItem(index, value.size)
+        })
+      })
       if (!input.pinned()) return
-      virtualizer.scrollToEnd()
+      const root = listRoot()
+      // Reopening a settled scroll-to-end operation can fight subsequent keyboard scrolling.
+      if (root && Math.abs(root.scrollHeight - root.clientHeight - root.scrollTop) > endEpsilon)
+        virtualizer.scrollToEnd()
     })
   }
-  virtualizer.resizeItem = (index, size) => {
-    resizeItem(index, size)
-    if (listRoot() && input.pinned()) anchorResizedBottom()
-  }
+  onCleanup(() => pendingSizes.clear())
   virtualizer.shouldAdjustScrollPositionOnItemSizeChange = (item, _delta, instance) => {
     // Prepended rows can resize more than once as deferred content mounts. Keep
     // compensating while they remain entirely above the visible content fold.
     if (addedKeys.has(String(item.key)))
-      return (
-        item.end <=
-        (instance.scrollOffset ?? 0) + instance.scrollAdjustments + instance.options.scrollMargin
-      )
+      return item.end <= (instance.scrollOffset ?? 0) + instance.scrollAdjustments + instance.options.scrollMargin
     const first = instance.range?.startIndex
     return first !== undefined && item.index < first
   }
@@ -186,50 +216,41 @@ export function createTimelineVirtualizer(input: Input) {
     })
   })
 
+  let settleFrame: number | undefined
   let overscanFrame: number | undefined
+  let overscanTimer: number | undefined
+  const expandOverscan = () => {
+    overscanFrame = requestAnimationFrame(() => {
+      overscanFrame = undefined
+      // Let the visible rows paint before building the normal interaction buffer.
+      overscanTimer = window.setTimeout(() => {
+        overscanTimer = undefined
+        setOverscan(20)
+      }, 0)
+    })
+  }
   const pendingMeasurements = () =>
     virtualizer.getVirtualItems().some((item) => !virtualizer.itemSizeCache.has(item.key))
   const settleColdBottom = () => {
     if (input.pinned()) virtualizer.scrollToEnd()
     if (virtualContent?.querySelector(pendingMarkdown) || pendingMeasurements()) {
-      overscanFrame = requestAnimationFrame(settleColdBottom)
+      settleFrame = requestAnimationFrame(settleColdBottom)
       return
     }
-    overscanFrame = requestAnimationFrame(() => {
+    settleFrame = requestAnimationFrame(() => {
       if (input.pinned()) virtualizer.scrollToEnd()
       if (virtualContent?.querySelector(pendingMarkdown) || pendingMeasurements()) {
         settleColdBottom()
         return
       }
-      overscanFrame = undefined
-      const content = virtualContent
-      if (!content) return
-      if (window.matchMedia("(prefers-reduced-motion: reduce)").matches) {
-        content.style.removeProperty("visibility")
-        return
-      }
-      const animation = ["animate-in", "fade-in", "duration-150"]
-      const clearAnimation = (event: AnimationEvent) => {
-        if (event.target !== content) return
-        content.removeEventListener("animationend", clearAnimation)
-        content.removeEventListener("animationcancel", clearAnimation)
-        content.classList.remove(...animation)
-      }
-      content.addEventListener("animationend", clearAnimation)
-      content.addEventListener("animationcancel", clearAnimation)
-      content.classList.add(...animation)
-      content.style.removeProperty("visibility")
+      settleFrame = undefined
+      virtualContent?.style.removeProperty("visibility")
+      expandOverscan()
     })
   }
   onMount(() => {
-    overscanFrame = requestAnimationFrame(() => {
-      if (renderOverscan() < 20) setRenderOverscan(20)
-      if (!coldBottomMount) {
-        overscanFrame = undefined
-        return
-      }
-      settleColdBottom()
-    })
+    if (coldBottomMount) settleFrame = requestAnimationFrame(settleColdBottom)
+    if (!coldBottomMount) expandOverscan()
   })
 
   let measuredSessionKey = input.sessionKey()
@@ -256,11 +277,13 @@ export function createTimelineVirtualizer(input: Input) {
   const handleListWheel = (event: WheelEvent & { currentTarget: HTMLDivElement }) => {
     input.onUserScroll(event.target)
     if (event.deltaY < 0) input.onUnpin()
+    setOverscan(20)
   }
 
   const handleListTouchStart = (event: TouchEvent) => {
     input.onUserScroll(event.target)
     touchStart = event.touches[0]?.clientY
+    setOverscan(20)
   }
 
   const handleListTouchMove = (event: TouchEvent & { currentTarget: HTMLDivElement }) => {
@@ -277,14 +300,19 @@ export function createTimelineVirtualizer(input: Input) {
   const handleListPointerDown = (event: PointerEvent & { currentTarget: HTMLDivElement }) => {
     input.onUserScroll(event.target)
     pointerHeld = true
-    const release = () => {
-      pointerHeld = false
-      window.removeEventListener("pointerup", release)
-      window.removeEventListener("pointercancel", release)
-    }
-    window.addEventListener("pointerup", release)
-    window.addEventListener("pointercancel", release)
+    setOverscan(20)
   }
+  const releasePointer = () => {
+    pointerHeld = false
+  }
+  onMount(() => {
+    window.addEventListener("pointerup", releasePointer)
+    window.addEventListener("pointercancel", releasePointer)
+  })
+  onCleanup(() => {
+    window.removeEventListener("pointerup", releasePointer)
+    window.removeEventListener("pointercancel", releasePointer)
+  })
 
   const handleListKeyDown = (event: KeyboardEvent & { currentTarget: HTMLDivElement }) => {
     const key = scrollKey(event)
@@ -293,6 +321,7 @@ export function createTimelineVirtualizer(input: Input) {
     if (scrollKeyOwner(event.currentTarget, event.target, key) !== event.currentTarget) return
     input.onUserScroll(event.currentTarget)
     if (upwardKeys.has(key)) input.onUnpin()
+    setOverscan(20)
   }
 
   // Following resumes by arriving at the end, either by scrolling there or by content shrinking
@@ -371,7 +400,7 @@ export function createTimelineVirtualizer(input: Input) {
     }
 
     return (
-      <div class="relative w-full h-full min-w-0" data-workspace-session={props.workspaceSession() ? "" : undefined}>
+      <div class="relative w-full h-full min-w-0">
         <div
           class="absolute left-1/2 -translate-x-1/2 z-[60] pointer-events-none transition-all duration-200 ease-out"
           classList={{
@@ -415,7 +444,6 @@ export function createTimelineVirtualizer(input: Input) {
           <Show when={input.showHeader()}>{props.header}</Show>
           <div
             data-timeline-virtual-content
-            class="motion-reduce:animate-none"
             ref={(element) => {
               virtualContent = element
               input.setContentRef(element)
@@ -447,7 +475,9 @@ export function createTimelineVirtualizer(input: Input) {
     cache.delete(ownerSessionKey)
     cache.set(ownerSessionKey, { measurements: virtualizer.takeSnapshot(), toolOpen: { ...toolOpen } })
     while (cache.size > 16) cache.delete(cache.keys().next().value!)
+    if (settleFrame !== undefined) cancelAnimationFrame(settleFrame)
     if (overscanFrame !== undefined) cancelAnimationFrame(overscanFrame)
+    if (overscanTimer !== undefined) window.clearTimeout(overscanTimer)
     input.setScrollRef(undefined)
     input.setRevealMessage?.(() => {})
     input.setScrollToEnd?.(() => {})

packages/app/src/settings/providers/extensions.tsx

@@ -27,6 +27,7 @@ export const SettingsExtensions: Component = () => {
   const [mcpList, { refetch: refetchMcp }] = createResource(
     () => serverSdk.connection.status() === "connected",
     () => serverSdk.api.mcp.list().then((result) => result.data),
+    { initialValue: [] },
   )
   const toggleMcp = useMcpToggle(() => undefined, refetchMcp)
   const mcps = createMemo<McpRowItem[]>(() => {
@@ -44,6 +45,7 @@ export const SettingsExtensions: Component = () => {
   const [pluginList] = createResource(
     () => serverSdk.connection.status() === "connected",
     () => serverSdk.api.plugin.list().then((result) => result.data),
+    { initialValue: [] },
   )
   const plugins = createMemo<PluginRowItem[]>(() => pluginLabels(pluginList.latest ?? []).map((name) => ({ name })))
 

packages/app/src/settings/settings.css

@@ -885,8 +885,6 @@
   display: flex;
   flex-direction: column;
   gap: 0;
-  max-height: 480px;
-  overflow-y: auto;
   padding: 20px;
   border-radius: 6px;
   background-color: var(--v2-background-bg-base);
@@ -1048,8 +1046,6 @@
   }
 
   .settings-workspaces-inventory [data-component="settings-list"] {
-    max-height: none;
-    overflow-y: visible;
     padding: 14px;
   }
 
@@ -1082,8 +1078,6 @@
   }
 
   .settings-workspaces-inventory [data-component="settings-list"] {
-    max-height: none;
-    overflow-y: visible;
     padding: 14px;
   }
 

packages/app/src/settings/workspaces/project-extensions.tsx

@@ -97,10 +97,12 @@ export const ProjectSettingsExtensions: Component = () => {
   const [globalPluginList] = createResource(
     () => serverSDK.connection.status() === "connected",
     () => serverSDK.api.plugin.list().then((result) => result.data),
+    { initialValue: [] },
   )
   const [projectPluginList] = createResource(
     () => (serverSDK.connection.status() === "connected" ? directorySDK().directory : undefined),
     (directory) => serverSDK.api.plugin.list({ location: { directory } }).then((result) => result.data),
+    { initialValue: [] },
   )
   const globalPlugins = createMemo(() => pluginLabels(globalPluginList.latest ?? []))
   const projectPlugins = createMemo(() => {

packages/app/src/settings/workspaces/workspaces.tsx

@@ -60,6 +60,7 @@ export const SettingsWorkspaces: Component<{ activeDirectory?: string }> = (prop
 
   const projectQuery = useQuery(() => ({
     queryKey: [serverSDK.scope, "settings-workspace-projects"] as const,
+    enabled: serverSDK.connection.status() === "connected",
     queryFn: async () =>
       Promise.all(
         (await serverSDK.api.project.list()).map(async (project) => {
@@ -71,10 +72,9 @@ export const SettingsWorkspaces: Component<{ activeDirectory?: string }> = (prop
       ),
     refetchOnMount: "always",
   }))
-  const workspaces = createMemo(() => workspaceInventory(projectQuery.data ?? []))
-  const projects = createMemo(() =>
-    (projectQuery.data ?? []).filter((project) => managedWorkspaceDirectories(project).length > 0),
-  )
+  const inventory = createMemo(() => (projectQuery.isPending ? [] : (projectQuery.data ?? [])))
+  const workspaces = createMemo(() => workspaceInventory(inventory()))
+  const projects = createMemo(() => inventory().filter((project) => managedWorkspaceDirectories(project).length > 0))
   const projectName = (project: Project) => project.name || getFilename(project.worktree)
   const projectOptions = createMemo(() => [
     { id: "all", label: language.t("settings.workspaces.filter.all") },
@@ -110,18 +110,18 @@ export const SettingsWorkspaces: Component<{ activeDirectory?: string }> = (prop
       workspaceDirectories().map((directory) => String(pathKey(directory))),
     ] as const,
     queryFn: () => loadSessions(workspaceDirectories()),
-    enabled: workspaceDirectories().length > 0,
+    enabled: serverSDK.connection.status() === "connected" && workspaceDirectories().length > 0,
     refetchOnMount: "always",
   }))
-  const sessionsByWorkspace = createMemo(
-    () =>
-      new Map(
-        workspaces().map((workspace) => [
-          pathKey(workspace.directory),
-          sessionQuery.data ? sessionsForWorkspace(sessionQuery.data, workspace.directory) : [],
-        ]),
-      ),
-  )
+  const sessionsByWorkspace = createMemo(() => {
+    const sessions = sessionQuery.isPending ? [] : (sessionQuery.data ?? [])
+    return new Map(
+      workspaces().map((workspace) => [
+        pathKey(workspace.directory),
+        sessionsForWorkspace(sessions, workspace.directory),
+      ]),
+    )
+  })
   const workspaceSessions = (workspace: Workspace) => sessionsByWorkspace().get(pathKey(workspace.directory)) ?? []
   const sessionCount = (workspace: Workspace) => {
     if (sessionQuery.isPending) return language.t("session.messages.loading")
@@ -279,7 +279,9 @@ export const SettingsWorkspaces: Component<{ activeDirectory?: string }> = (prop
       <div class="settings-tab-body settings-workspaces">
         <div class="settings-workspaces-toolbar">
           <span class="settings-workspaces-count">
-            {language.plural("settings.workspaces.count", filtered().length)}
+            <Show when={!projectQuery.isPending && !projectQuery.isError}>
+              {language.plural("settings.workspaces.count", filtered().length)}
+            </Show>
           </span>
           <div class="settings-workspaces-toolbar-actions">
             <Show when={projects().length > 1}>
@@ -332,7 +334,17 @@ export const SettingsWorkspaces: Component<{ activeDirectory?: string }> = (prop
         <div class="settings-workspaces-inventory">
           <Show
             when={filtered().length > 0}
-            fallback={<div class="settings-workspaces-empty">{language.t("settings.workspaces.empty")}</div>}
+            fallback={
+              <div class="settings-workspaces-empty">
+                {language.t(
+                  projectQuery.isPending
+                    ? "common.loading"
+                    : projectQuery.isError
+                      ? "common.requestFailed"
+                      : "settings.workspaces.empty",
+                )}
+              </div>
+            }
           >
             <SettingsList>
               <For each={filtered()}>

packages/app/src/shell/routes/routes.tsx

@@ -36,7 +36,7 @@ export function AppRoutes() {
           <SessionRouteFrame>
             <Suspense
               fallback={
-                <div class="flex min-h-0 flex-1 p-2">
+                <div class="flex min-h-0 flex-1 px-2 pb-2 pt-[var(--shell-top-inset,8px)]">
                   <SessionPanelFrame raised />
                 </div>
               }

packages/app/src/shell/shell.tsx

@@ -43,6 +43,13 @@ export default function Layout(props: ParentProps) {
         style={{
           "padding-top": "env(safe-area-inset-top, 0px)",
           "padding-bottom": "env(safe-area-inset-bottom, 0px)",
+          // The native Windows titlebar already includes the gap above the content panels.
+          "--shell-top-inset":
+            platform.platform === "desktop" &&
+            platform.os === "windows" &&
+            !(mobile() && preferences.general.mobileTitlebarPosition() === "bottom")
+              ? "0px"
+              : "8px",
         }}
       >
         <Titlebar
@@ -59,7 +66,7 @@ export default function Layout(props: ParentProps) {
             <aside
               ref={(element) => setState("tabsMount", element)}
               data-slot="vertical-tabs-sidebar"
-              class="relative flex min-h-0 shrink-0 flex-col bg-v2-background-bg-deep px-2.5 py-2"
+              class="relative flex min-h-0 shrink-0 flex-col bg-v2-background-bg-deep px-2.5 pb-2 pt-[var(--shell-top-inset,8px)]"
               style={{ width: `${state.tabsWidth}px` }}
             >
               <ResizeHandle

packages/app/src/shell/titlebar/titlebar.tsx

@@ -27,6 +27,7 @@ import { newTabTooltipKeybind } from "@/shell/commands/tooltip-keybind"
 import { TitlebarRightMount } from "@/shell/titlebar/right-slot"
 
 const titlebarHeight = 36
+const windowsTitlebarHeight = 44 // Includes the content inset; matches the native Windows overlay.
 const minTitlebarZoom = 0.25
 const windowsControlsBaseWidth = 138 // 3 native Windows caption buttons at 46px each.
 const macTrafficLightsBaseWidth = 84
@@ -59,7 +60,7 @@ export function Titlebar(props: {
   const titlebarZoom = () => (windows() ? Math.max(zoom(), minTitlebarZoom) : zoom())
   const minHeight = () => {
     if (mac()) return `${titlebarHeight / zoom()}px`
-    if (windows()) return `env(titlebar-area-height, ${titlebarHeight / Math.min(titlebarZoom(), 1)}px)`
+    if (windows()) return `env(titlebar-area-height, ${windowsTitlebarHeight / Math.min(titlebarZoom(), 1)}px)`
     return undefined
   }
   const windowsControlsWidth = () => `${windowsControlsBaseWidth / Math.max(titlebarZoom(), 1)}px`

packages/app/test-browser/playwright-config.test.ts

@@ -0,0 +1,70 @@
+import { expect, test } from "bun:test"
+import path from "node:path"
+
+test.each([
+  { name: "local development", ci: "", build: "", built: false },
+  { name: "local production build", ci: "", build: "1", built: true },
+  { name: "CI production build", ci: "true", build: "", built: true },
+  { name: "CI cannot opt into development", ci: "true", build: "0", built: true },
+])("Playwright uses $name", ({ ci, build, built }) => {
+  const result = Bun.spawnSync({
+    cmd: [process.execPath, "-e", 'import config from "./playwright.config.ts"; console.log(JSON.stringify(config))'],
+    cwd: path.resolve(import.meta.dirname, ".."),
+    env: {
+      ...process.env,
+      CI: ci,
+      PLAYWRIGHT_BUILD: build,
+      PLAYWRIGHT_BASE_URL: undefined,
+      PLAYWRIGHT_PORT: "4321",
+      PLAYWRIGHT_SERVER_HOST: "127.0.0.2",
+      PLAYWRIGHT_SERVER_PORT: "4322",
+    },
+  })
+  expect(result.exitCode).toBe(0)
+  const config = JSON.parse(result.stdout.toString())
+  expect(config.use.baseURL).toBe("http://127.0.0.1:4321")
+  expect(config.webServer.url).toBe(config.use.baseURL)
+  expect(config.webServer.command).toBe(
+    built
+      ? "bun run build && bun run serve -- --host 127.0.0.1 --port 4321 --strictPort"
+      : "bun run dev -- --host 127.0.0.1 --port 4321 --strictPort",
+  )
+  expect(config.webServer.reuseExistingServer).toBe(!built)
+  expect(config.webServer.env).toEqual({
+    VITE_OPENCODE_SERVER_HOST: built ? "127.0.0.1" : "127.0.0.2",
+    VITE_OPENCODE_SERVER_PORT: built ? "4321" : "4322",
+  })
+})
+
+test.each([
+  "./playwright.config.ts",
+  "./e2e/performance/playwright.config.ts",
+  "./e2e/performance/playwright.uncapped.config.ts",
+  "./e2e/performance/timeline-stability/playwright.config.ts",
+])("%s leaves an explicit external app unmanaged", (file) => {
+  const result = Bun.spawnSync({
+    cmd: [
+      process.execPath,
+      "-e",
+      `import config from ${JSON.stringify(file)}; console.log(JSON.stringify({ ...config, fixtureHost: process.env.PLAYWRIGHT_SERVER_HOST, fixturePort: process.env.PLAYWRIGHT_SERVER_PORT }))`,
+    ],
+    cwd: path.resolve(import.meta.dirname, ".."),
+    env: { ...process.env, CI: "true", PLAYWRIGHT_BASE_URL: "http://127.0.0.1:4444" },
+  })
+  expect(result.exitCode).toBe(0)
+  const config = JSON.parse(result.stdout.toString())
+  expect(config.webServer).toBeUndefined()
+  expect(config.use.baseURL).toBe("http://127.0.0.1:4444")
+  expect(config.fixtureHost).toBe("127.0.0.1")
+  expect(config.fixturePort).toBe("4444")
+})
+
+test("Playwright rejects HTTPS targets unsupported by the API fixtures", () => {
+  const result = Bun.spawnSync({
+    cmd: [process.execPath, "-e", 'import "./playwright.config.ts"'],
+    cwd: path.resolve(import.meta.dirname, ".."),
+    env: { ...process.env, CI: "true", PLAYWRIGHT_BASE_URL: "https://e2e.example.com" },
+  })
+  expect(result.exitCode).not.toBe(0)
+  expect(result.stderr.toString()).toContain("E2E fixtures require an http:// app URL")
+})

packages/app/test-browser/provider-catalog.test.ts

@@ -0,0 +1,52 @@
+import { expect, test } from "bun:test"
+import { createMemo, createRoot } from "solid-js"
+import { createStore } from "solid-js/store"
+import { normalizeProviderList } from "@/runtime/server/global-sync/utils"
+
+test("preserves an already normalized reactive catalog", () => {
+  const [store] = createStore({ catalog: { all: new Map<string, never>(), connected: [], default: {} } })
+  expect(normalizeProviderList(store.catalog)).toBe(store.catalog)
+})
+
+test("shares catalog snapshots and reacts to replacement lists", () => {
+  createRoot((dispose) => {
+    const provider = { id: "openai", name: "OpenAI", package: "@ai-sdk/openai", activation: "enabled" as const }
+    const model = {
+      id: "gpt-5",
+      modelID: "gpt-5",
+      providerID: "openai",
+      name: "GPT-5",
+      settings: {},
+      headers: {},
+      capabilities: { tools: true, input: ["text" as const], output: ["text" as const] },
+      variants: [],
+      time: { released: 1 },
+      cost: [],
+      status: "active" as const,
+      enabled: true,
+      limit: { context: 128_000, output: 8192 },
+    }
+    const [store, setStore] = createStore({ providers: [provider], models: [model] })
+    const first = createMemo(() => normalizeProviderList(store.providers, store.models))
+    const second = createMemo(() => normalizeProviderList(store.providers, store.models))
+    expect(first()).toBe(second())
+    const initial = first()
+    setStore("models", [{ ...model, name: "Renamed", limit: { context: 256_000, output: 16384 } }])
+    expect(first()).not.toBe(initial)
+    expect(first()).toBe(second())
+    expect(first().all.get("openai")?.models[model.id]).toMatchObject({
+      name: "Renamed",
+      limit: { context: 256_000, output: 16384 },
+    })
+    const renamed = first()
+    setStore("providers", [{ ...provider, name: "Custom OpenAI" }])
+    expect(first()).not.toBe(renamed)
+    expect(first()).toBe(second())
+    expect(first().all.get("openai")?.name).toBe("Custom OpenAI")
+    expect(normalizeProviderList(store.providers).all.get("openai")?.models).toEqual({})
+    setStore("models", [])
+    expect(first().all.get("openai")?.models).toEqual({})
+    expect(first().default).toEqual({})
+    dispose()
+  })
+})

packages/cli/package.json

@@ -27,7 +27,7 @@
     "@effect/platform-node": "catalog:",
     "@opencode-ai/client": "workspace:*",
     "@opencode-ai/plugin": "workspace:*",
-    "@opencode-ai/pty": "0.1.10",
+    "@opencode-ai/pty": "0.1.12",
     "@opencode-ai/schema": "workspace:*",
     "@opencode-ai/server": "workspace:*",
     "@opencode-ai/tui": "workspace:*",

packages/core/package.json

@@ -118,7 +118,7 @@
     "@ff-labs/fff-node": "0.10.5",
     "@opencode-ai/codemode": "workspace:*",
     "@opencode-ai/ai": "workspace:*",
-    "@opencode-ai/pty": "0.1.10",
+    "@opencode-ai/pty": "0.1.12",
     "@opencode-ai/schema": "workspace:*",
     "@opencode-ai/plugin": "workspace:*",
     "@opencode-ai/util": "workspace:*",

packages/core/src/bus.ts

@@ -11,6 +11,9 @@ import { KeyedMutex } from "./effect/keyed-mutex.js"
 import { makeGlobalNode } from "@opencode-ai/util/effect/app-node"
 import { isDeepStrictEqual } from "node:util"
 import { Durable } from "@opencode-ai/schema/durable-event-manifest"
+import { SessionEvent } from "@opencode-ai/schema/session-event"
+import type { SessionID } from "@opencode-ai/schema/session-id"
+import { AbsolutePath } from "@opencode-ai/schema/schema"
 
 export type Subscriber<D extends Event.Definition = Event.Definition> = (event: Event.Payload<D>) => Effect.Effect<void>
 export type Unsubscribe = Effect.Effect<void>
@@ -119,6 +122,9 @@ export interface Subscribe {
   /**
    * Volatile live channel: every event published from now on, nothing before or
    * across a disconnect. Consumers that need reliability combine it with `log`.
+   * With an ambient Location, delivery is restricted to that Location and global
+   * events. Unlocated Session events use the Session's owner at publication time.
+   * Session moves reach both the old and new Location, without changing the event.
    */
   (): Stream.Stream<Event.Payload>
   <D extends Event.Definition>(definition: D): Stream.Stream<Event.Payload<D>>
@@ -183,6 +189,7 @@ export function configured(options?: Options) {
         // Deferred import: a static one would close the module cycle
         // bus → location → project → bus and hit the node bindings in TDZ.
         const { Location } = yield* Effect.promise(() => import("./location.js"))
+        const { SessionTable } = yield* Effect.promise(() => import("./session/sql.js"))
         const pubsub = {
           live: yield* PubSub.unbounded<Event.Payload>(),
           durable: new Map<string, Set<PubSub.PubSub<void>>>(),
@@ -194,6 +201,64 @@ export function configured(options?: Options) {
         const { db } = yield* Database.Service
         const logReadPageSize = options?.logReadPageSize ?? 512
         const persist = options?.persist ?? false
+        const sessions = new Map<SessionID, Location.Ref>()
+        // Keep routing separate from the public event, and retain its snapshot
+        // while a slow subscriber drains events queued before a move or deletion.
+        const routes = new WeakMap<Event.Payload, readonly Location.Ref[]>()
+
+        const isSessionEvent = (event: Event.Payload): event is SessionEvent.Event =>
+          Object.hasOwn(SessionEvent.All.cases, event.type)
+
+        const prepareRoutes = Effect.fnUntraced(function* (events: readonly Event.Payload[]) {
+          const updates = new Map<SessionID, Location.Ref | undefined>()
+          const resolved = new Map<Event.Payload, readonly Location.Ref[]>()
+          for (const event of events) {
+            if (!isSessionEvent(event)) continue
+            const id = event.data.sessionID
+            if (event.type === "session.created") {
+              updates.set(id, event.data.location)
+              resolved.set(event, [event.location ?? event.data.location])
+              continue
+            }
+            if (event.location && event.type !== "session.forked" && event.type !== "session.moved") {
+              if (event.type === "session.deleted") updates.set(id, undefined)
+              continue
+            }
+            const owner = event.type === "session.forked" ? event.data.parentID : id
+            let ref = updates.has(owner) ? updates.get(owner) : sessions.get(owner)
+            if (!ref && !updates.has(owner)) {
+              const row = yield* db
+                .select({ directory: SessionTable.directory, workspaceID: SessionTable.workspace_id })
+                .from(SessionTable)
+                .where(eq(SessionTable.id, owner))
+                .get()
+                .pipe(Effect.orDie)
+              ref = row
+                ? { directory: AbsolutePath.make(row.directory), workspaceID: row.workspaceID ?? undefined }
+                : undefined
+              updates.set(owner, ref)
+            }
+            if (event.type === "session.moved") {
+              // Both owners need the transition, even if the producer supplied
+              // an envelope location. Later events use only the destination.
+              updates.set(id, event.data.location)
+              resolved.set(event, ref ? [ref, event.data.location] : [event.data.location])
+              continue
+            }
+            if (event.type === "session.forked") updates.set(id, ref)
+            resolved.set(event, event.location ? [event.location] : ref ? [ref] : [])
+            if (event.type === "session.deleted") updates.set(id, undefined)
+          }
+          // Apply only after the projection transaction commits. A failed move
+          // must not redirect events away from the Session's actual location.
+          return () => {
+            for (const [id, ref] of updates) {
+              if (ref) sessions.set(id, ref)
+              else sessions.delete(id)
+            }
+            for (const [event, ref] of resolved) routes.set(event, ref)
+          }
+        })
 
         const getOrCreate = (definition: Event.Definition) =>
           Effect.gen(function* () {
@@ -335,6 +400,7 @@ export function configured(options?: Options) {
                               ...event,
                               durable: { aggregateID, seq, version: durable.version },
                             } as Event.Payload
+                            const route = yield* prepareRoutes([committed])
                             for (const projector of list) {
                               yield* projector(committed)
                             }
@@ -366,12 +432,13 @@ export function configured(options?: Options) {
                                 ])
                                 .run()
                                 .pipe(Effect.orDie)
-                            return { aggregateID, seq }
+                            return { aggregateID, seq, event: committed, route }
                           }),
                         { behavior: "immediate" },
                       )
                       .pipe(Effect.orDie)
                     if (committed) {
+                      committed.route()
                       yield* Effect.forEach(
                         pubsub.durable.get(committed.aggregateID) ?? [],
                         (wake) => PubSub.publish(wake, undefined),
@@ -409,15 +476,14 @@ export function configured(options?: Options) {
                 Effect.gen(function* () {
                   const committed = yield* commitDurableEvent(definition, event as Event.Payload, undefined, commit)
                   if (!committed) return event
-                  event = {
-                    ...event,
-                    durable: envelope(committed.aggregateID, committed.seq, definition.durable.version),
-                  }
+                  event = committed.event as Event.Payload<D>
                   yield* notify(event as Event.Payload, true)
                   return event
                 }),
               )
             }
+            const route = yield* prepareRoutes([event as Event.Payload])
+            route()
             yield* notify(event as Event.Payload, false)
             return event
           })
@@ -527,7 +593,11 @@ export function configured(options?: Options) {
                             .pipe(Effect.orDie)
                           const firstSeq = (row?.seq ?? -1) + 1
                           const finalSeq = firstSeq + payloads.length - 1
-                          const result = new Array<Event.Payload>()
+                          const queued = payloads.map((item, index) => ({
+                            ...item.event,
+                            durable: envelope(aggregateID, firstSeq + index, item.definition.durable.version),
+                          }))
+                          const route = yield* prepareRoutes(queued)
                           const rows = new Array<typeof EventTable.$inferInsert>()
                           const ids = new Set<Event.ID>()
                           for (const [index, item] of payloads.entries()) {
@@ -559,10 +629,7 @@ export function configured(options?: Options) {
                                   }),
                                 )
                             }
-                            const event = {
-                              ...item.event,
-                              durable: envelope(aggregateID, seq, item.definition.durable.version),
-                            } as Event.Payload
+                            const event = queued[index]
                             for (const projector of projectors.get(
                               versionedType(item.definition.type, item.definition.durable.version),
                             ) ?? []) {
@@ -578,7 +645,6 @@ export function configured(options?: Options) {
                                 type: versionedType(item.definition.type, item.definition.durable.version),
                                 data: encoded,
                               })
-                            result.push(event)
                           }
                           yield* db
                             .insert(EventSequenceTable)
@@ -587,11 +653,12 @@ export function configured(options?: Options) {
                             .run()
                             .pipe(Effect.orDie)
                           if (persist) yield* db.insert(EventTable).values(rows).run().pipe(Effect.orDie)
-                          return result
+                          return { events: queued, route }
                         }),
                       { behavior: "immediate" },
                     )
                     .pipe(Effect.orDie)
+                  committed.route()
                   yield* Effect.forEach(
                     pubsub.durable.get(aggregateID) ?? [],
                     (wake) => PubSub.publish(wake, undefined),
@@ -599,8 +666,8 @@ export function configured(options?: Options) {
                       discard: true,
                     },
                   )
-                  yield* Effect.forEach(committed, (event) => notify(event, true), { discard: true })
-                  return committed as PublishResult<I>
+                  yield* Effect.forEach(committed.events, (event) => notify(event, true), { discard: true })
+                  return committed.events as PublishResult<I>
                 }),
               ),
             )
@@ -632,13 +699,7 @@ export function configured(options?: Options) {
                   strictOwner: options?.strictOwner,
                 })
                 if (committed && options?.publish) {
-                  yield* notify(
-                    {
-                      ...payload,
-                      durable: envelope(committed.aggregateID, committed.seq, definition.durable.version),
-                    },
-                    true,
-                  )
+                  yield* notify(committed.event, true)
                 }
               }),
             )
@@ -653,7 +714,10 @@ export function configured(options?: Options) {
                 yield* db.delete(EventTable).where(eq(EventTable.aggregate_id, aggregateID)).run()
               }),
             )
-            .pipe(Effect.orDie)
+            .pipe(
+              Effect.tap(() => Effect.sync(() => sessions.delete(aggregateID as SessionID))),
+              Effect.orDie,
+            )
         }
 
         function claim(aggregateID: string, ownerID: string) {
@@ -671,15 +735,17 @@ export function configured(options?: Options) {
               Effect.map((location) =>
                 Option.match(location, {
                   onNone: () => stream,
-                  onSome: (location) =>
-                    stream.pipe(
-                      Stream.filter(
-                        (event) =>
-                          !event.location ||
-                          (event.location.directory === location.directory &&
-                            event.location.workspaceID === location.workspaceID),
-                      ),
-                    ),
+                  onSome: (location) => {
+                    const matches = (ref: Location.Ref) =>
+                      ref.directory === location.directory && ref.workspaceID === location.workspaceID
+                    return stream.pipe(
+                      Stream.filter((event) => {
+                        const refs = routes.get(event)
+                        if (refs) return refs.some(matches)
+                        return !event.location || matches(event.location)
+                      }),
+                    )
+                  },
                 }),
               ),
             ),

packages/core/src/git.ts

@@ -507,9 +507,11 @@ const layer = Layer.effect(
       from: TreeID
       to: TreeID
     }) {
+      // Undo needs both paths of a rename, not only its destination.
       return (yield* repositoryOperation("list_files", input.repository, [
         "diff",
         "--name-only",
+        "--no-renames",
         "-z",
         input.from,
         input.to,

packages/core/src/mcp/client.ts

@@ -207,7 +207,10 @@ export const connect = Effect.fnUntraced(function* (
     }
     if (!URL.canParse(config.url))
       return yield* new ConnectError({ server, message: `Invalid MCP URL for "${server}"` })
-    return new StreamableHTTPClientTransport(new URL(config.url), {
+    // Prefer raw tools for our Code Mode without changing the configured URL used for OAuth identity.
+    const url = new URL(config.url)
+    if (config.codemode !== false && !url.searchParams.has("codemode")) url.searchParams.set("codemode", "false")
+    return new StreamableHTTPClientTransport(url, {
       requestInit: config.headers ? { headers: config.headers } : undefined,
       authProvider,
     })

packages/core/src/plugin/host.ts

@@ -73,6 +73,7 @@ export const make = Effect.fn("PluginHost.make")(function* (plugin: Interface, p
 
   return {
     app,
+    location: locationInfo(),
     options: {},
     agent: {
       get: (input) => {
@@ -288,26 +289,6 @@ export const make = Effect.fn("PluginHost.make")(function* (plugin: Interface, p
         if (ref && !isCurrentLocation(ref)) return runtime.location.mcp.list(ref)
         return response(mcp.servers())
       },
-      add: (input) => {
-        const ref = locationRef(input)
-        if (ref && !isCurrentLocation(ref)) return runtime.location.mcp.add(ref, input.server, input.config)
-        return mcp.add(input.server, input.config)
-      },
-      remove: (input) => {
-        const ref = locationRef(input)
-        if (ref && !isCurrentLocation(ref)) return runtime.location.mcp.remove(ref, input.server)
-        return mcp.remove(input.server)
-      },
-      connect: (input) => {
-        const ref = locationRef(input)
-        if (ref && !isCurrentLocation(ref)) return runtime.location.mcp.connect(ref, input.server)
-        return mcp.connect(input.server)
-      },
-      disconnect: (input) => {
-        const ref = locationRef(input)
-        if (ref && !isCurrentLocation(ref)) return runtime.location.mcp.disconnect(ref, input.server)
-        return mcp.disconnect(input.server)
-      },
       reload: mcp.reload,
       transform: (callback) =>
         mcp.transform((draft) => {
@@ -377,14 +358,8 @@ export const make = Effect.fn("PluginHost.make")(function* (plugin: Interface, p
       hook: (name, callback) => hooks.register("shell", name, callback),
     },
     tool: {
-      transform: (callback) =>
-        tools
-          .transform((draft) =>
-            callback({
-              add: (tool) => draft.add(tool),
-            }),
-          )
-          .pipe(Effect.as({ dispose: Effect.void })),
+      transform: tools.transform,
+      reload: tools.reload,
       hook: (name, callback) => hooks.register("tool", name, callback),
     },
     vcs: {

packages/core/src/plugin/mcp-codemode-exclusion.ts

@@ -4,7 +4,7 @@ import { define } from "@opencode-ai/plugin/effect/plugin"
 import { Effect } from "effect"
 
 // These servers provide Code Mode, so expose them directly instead of nesting them inside OpenCode Code Mode.
-const urls = [/^https:\/\/mcp\.cloudflare\.com\/mcp$/, /^https:\/\/executor\.sh\/[^/]+\/mcp$/]
+const urls = [/^https:\/\/executor\.sh\/[^/]+\/mcp$/]
 
 export const Plugin = define({
   id: "opencode.mcp.codemode.exclusion",

packages/core/src/plugin/runtime.ts

@@ -2,7 +2,6 @@ export * as PluginRuntime from "./runtime.js"
 
 import { Context, Effect, Layer } from "effect"
 import { Agent } from "../agent.js"
-import { Mcp } from "@opencode-ai/schema/mcp"
 import { makeGlobalNode } from "@opencode-ai/util/effect/app-node"
 import { Job } from "../job.js"
 import { Location } from "../location.js"
@@ -40,10 +39,6 @@ export interface Interface {
       readonly list: (
         ref: Location.Ref,
       ) => Effect.Effect<{ readonly location: Location.Info; readonly data: MCP.ServerInfo[] }, unknown>
-      readonly add: (ref: Location.Ref, server: string, config: Mcp.ServerConfig) => Effect.Effect<void, unknown>
-      readonly remove: (ref: Location.Ref, server: string) => Effect.Effect<void, unknown>
-      readonly connect: (ref: Location.Ref, server: string) => Effect.Effect<void, unknown>
-      readonly disconnect: (ref: Location.Ref, server: string) => Effect.Effect<void, unknown>
     }
   }
 }
@@ -101,10 +96,6 @@ export const layerWithCell = (cell: Cell) =>
         },
         mcp: {
           list: (ref) => require(cell, (runtime) => runtime.location.mcp.list(ref)),
-          add: (ref, server, config) => require(cell, (runtime) => runtime.location.mcp.add(ref, server, config)),
-          remove: (ref, server) => require(cell, (runtime) => runtime.location.mcp.remove(ref, server)),
-          connect: (ref, server) => require(cell, (runtime) => runtime.location.mcp.connect(ref, server)),
-          disconnect: (ref, server) => require(cell, (runtime) => runtime.location.mcp.disconnect(ref, server)),
         },
       },
     }),
@@ -149,14 +140,6 @@ export const providerLayerWithCell = (cell: Cell) =>
                   data: yield* mcp.servers(),
                 }
               }).pipe(Effect.provide(locations.get(ref))),
-            add: (ref, server, config) =>
-              MCP.Service.use((mcp) => mcp.add(server, config)).pipe(Effect.provide(locations.get(ref))),
-            remove: (ref, server) =>
-              MCP.Service.use((mcp) => mcp.remove(server)).pipe(Effect.provide(locations.get(ref))),
-            connect: (ref, server) =>
-              MCP.Service.use((mcp) => mcp.connect(server)).pipe(Effect.provide(locations.get(ref))),
-            disconnect: (ref, server) =>
-              MCP.Service.use((mcp) => mcp.disconnect(server)).pipe(Effect.provide(locations.get(ref))),
           },
         },
       }

packages/core/src/session/compaction.ts

@@ -8,9 +8,10 @@ import { Bus } from "../bus.js"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { llmClient } from "../effect/app-node-platform.js"
 import { SessionEvent } from "./event.js"
+import type { SessionContext } from "./context.js"
 import type { SessionMessage } from "./message.js"
-import { SessionModelRequest } from "./model-request.js"
-import { SessionRunnerModel } from "./runner/model.js"
+import type { SessionModelRequest } from "./model-request.js"
+import type { SessionRunnerModel } from "./runner/model.js"
 import { SessionSchema } from "./schema.js"
 import { toSessionError } from "./to-session-error.js"
 import { Token } from "../util/token.js"
@@ -69,14 +70,13 @@ type Dependencies = {
   readonly llm: {
     readonly stream: (request: LLMRequest, options?: StreamOptions) => Stream.Stream<LLMEvent, AIError>
   }
-  readonly models: SessionRunnerModel.Interface
-  readonly modelRequests: SessionModelRequest.Interface
 }
 
 export type AutoInput = {
   readonly session: SessionSchema.Info
   readonly messages: readonly SessionMessage.Info[]
   readonly resolved: SessionRunnerModel.Resolved
+  readonly prepare: SessionModelRequest.Interface["prepare"]
 }
 
 type RequiredInput = Pick<AutoInput, "messages" | "resolved">
@@ -86,6 +86,9 @@ export type ManualInput = {
   readonly messages: readonly SessionMessage.Info[]
   readonly inputID: SessionMessage.ID
   readonly started?: boolean
+  /** Invoked after content planning, not when the caller captures the operation. */
+  readonly resolveModel: SessionContext.Interface["resolveModel"]
+  readonly prepare: SessionModelRequest.Interface["prepare"]
 }
 
 type Plan = {
@@ -96,6 +99,7 @@ type Plan = {
   readonly recent: string
   readonly inputID?: SessionMessage.ID
   readonly started?: boolean
+  readonly prepare: SessionModelRequest.Interface["prepare"]
 }
 
 export type Outcome =
@@ -278,7 +282,7 @@ const make = (dependencies: Dependencies) => {
           })
         : Effect.void,
     )
-    const prepared = yield* dependencies.modelRequests.prepare({
+    const prepared = yield* plan.prepare({
       scope: { session: plan.session, agentID: Agent.ID.make("compaction"), model: plan.resolved },
       transcript: { system: [], messages: [Message.user(plan.prompt)] },
       contextHooks: false,
@@ -348,6 +352,7 @@ const make = (dependencies: Dependencies) => {
       return yield* execute({
         session: input.session,
         resolved: input.resolved,
+        prepare: input.prepare,
         reason: "auto",
         ...content,
       })
@@ -387,7 +392,7 @@ const make = (dependencies: Dependencies) => {
         error: { type: "compaction.unavailable", message: "Nothing to compact yet" },
         inputID: input.inputID,
       })
-    const resolved = yield* dependencies.models.resolve(input.session).pipe(
+    const resolved = yield* input.resolveModel(input.session).pipe(
       Effect.catch((cause) =>
         failed({
           sessionID: input.session.id,
@@ -401,6 +406,7 @@ const make = (dependencies: Dependencies) => {
     return yield* execute({
       session: input.session,
       resolved,
+      prepare: input.prepare,
       reason: "manual",
       inputID: input.inputID,
       started: input.started,
@@ -422,14 +428,12 @@ export const layer = Layer.effect(
   Effect.gen(function* () {
     const bus = yield* Bus.Service
     const llm = yield* LLMClient.Service
-    const models = yield* SessionRunnerModel.Service
-    const modelRequests = yield* SessionModelRequest.Service
-    return make({ bus, llm, models, modelRequests })
+    return make({ bus, llm })
   }),
 )
 
 export const node = makeLocationNode({
   service: Service,
   layer,
-  deps: [Bus.node, llmClient, SessionRunnerModel.node, SessionModelRequest.node],
+  deps: [Bus.node, llmClient],
 })

packages/core/src/session/context.ts

@@ -2,6 +2,7 @@ export * as SessionContext from "./context.js"
 
 import { Context, Effect, Layer } from "effect"
 import { Agent } from "../agent.js"
+import { Catalog } from "../catalog.js"
 import { CodeModeInstructions } from "../codemode/instructions.js"
 import { Database } from "../database/database.js"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
@@ -11,6 +12,7 @@ import { InstructionBuiltIns } from "../instructions/builtins.js"
 import { Location } from "../location.js"
 import { McpInstructions } from "../mcp/instructions.js"
 import { McpTool } from "../tool/mcp.js"
+import { Model } from "../model.js"
 import { PluginSupervisor } from "../plugin/supervisor.js"
 import { ReferenceInstructions } from "../reference/instructions.js"
 import { SkillInstructions } from "../skill/instructions.js"
@@ -19,6 +21,7 @@ import { AgentNotFoundError } from "./error.js"
 import { SessionHistory } from "./history.js"
 import { InstructionEntry } from "./instruction-entry.js"
 import { SessionMessage } from "./message.js"
+import { SessionModelRequest } from "./model-request.js"
 import { SessionRunnerModel } from "./runner/model.js"
 import { SessionSchema } from "./schema.js"
 import { SessionStore } from "./store.js"
@@ -42,14 +45,27 @@ export interface Loaded {
 /**
  * Resolves model-request state in two phases: `select` fixes the Session,
  * agent, instruction sources, and tool snapshot; `load` adds the model and
- * active history for that selection. This module does not build or execute the
- * model request.
+ * active history for that selection. Auxiliary operations resolve only the
+ * capabilities they need; request preparation stays separate from selection.
  */
 export interface Interface {
   /** Selects the Session, agent, instructions, and tools used by subsequent work. */
   readonly select: (sessionID: SessionSchema.ID) => Effect.Effect<Selection, AgentNotFoundError>
   /** Resolves the model and active history for that selection. */
   readonly load: (selection: Selection) => Effect.Effect<Loaded, SessionRunnerModel.Error>
+  readonly resolveModel: (
+    session: SessionSchema.Info,
+  ) => Effect.Effect<SessionRunnerModel.Resolved, SessionRunnerModel.Error>
+  /** Selects auxiliary title capabilities without instruction or tool preflight. */
+  readonly selectTitle: (session: SessionSchema.Info) => Effect.Effect<
+    | {
+        readonly agent: Agent.Info
+        readonly primary: SessionRunnerModel.Resolved | undefined
+        readonly selected: SessionRunnerModel.Resolved
+      }
+    | undefined
+  >
+  readonly prepare: SessionModelRequest.Interface["prepare"]
 }
 
 /** Location-scoped model-context loader for durable Session Steps. */
@@ -60,6 +76,7 @@ const layer = Layer.effect(
   Effect.gen(function* () {
     const agents = yield* Agent.Service
     const builtins = yield* InstructionBuiltIns.Service
+    const catalog = yield* Catalog.Service
     const db = (yield* Database.Service).db
     const discovery = yield* InstructionDiscovery.Service
     const entries = yield* InstructionEntry.Service
@@ -67,12 +84,41 @@ const layer = Layer.effect(
     const mcpInstructions = yield* McpInstructions.Service
     const mcpTools = yield* McpTool.Service
     const models = yield* SessionRunnerModel.Service
+    const modelRequests = yield* SessionModelRequest.Service
     const plugins = yield* PluginSupervisor.Service
     const referenceInstructions = yield* ReferenceInstructions.Service
     const skillInstructions = yield* SkillInstructions.Service
     const store = yield* SessionStore.Service
     const registry = yield* Tool.Service
 
+    const resolveModel = (session: SessionSchema.Info) => models.resolve(session, catalog.model.available)
+
+    const selectTitle = Effect.fn("SessionContext.selectTitle")(function* (session: SessionSchema.Info) {
+      const agent = yield* agents.get(Agent.ID.make("title"))
+      if (!agent) return
+      const primary = yield* resolveModel(session).pipe(Effect.orElseSucceed(() => undefined))
+      const info = yield* Effect.gen(function* () {
+        if (agent.model) return yield* catalog.model.get(agent.model.providerID, agent.model.id)
+        if (!primary) return
+        return yield* catalog.model.small(primary.ref.providerID)
+      })
+      const variant =
+        agent.model?.variant ?? MINIMAL_REASONING_VARIANTS.find((id) => info?.variants.some((item) => item.id === id))
+      const preferred =
+        info &&
+        (yield* resolveModel({
+          ...session,
+          model: Model.Ref.make({
+            providerID: info.providerID,
+            id: info.id,
+            ...(variant ? { variant } : {}),
+          }),
+        }).pipe(Effect.orElseSucceed(() => undefined)))
+      const selected = preferred ?? primary
+      if (!selected) return
+      return { agent, primary, selected }
+    })
+
     const select = Effect.fn("SessionContext.select")(function* (sessionID: SessionSchema.ID) {
       const session = yield* store.get(sessionID)
       if (!session) return yield* Effect.die(new Error(`Session not found: ${sessionID}`))
@@ -112,7 +158,7 @@ const layer = Layer.effect(
     })
 
     const load = Effect.fn("SessionContext.load")(function* (selection: Selection) {
-      const model = yield* models.resolve(selection.session)
+      const model = yield* resolveModel(selection.session)
       const history = yield* SessionHistory.entriesForRunner(db, selection.session.id, selection.instructions)
       return {
         session: selection.session,
@@ -124,15 +170,19 @@ const layer = Layer.effect(
       }
     })
 
-    return Service.of({ select, load })
+    return Service.of({ select, load, resolveModel, selectTitle, prepare: modelRequests.prepare })
   }),
 )
 
+/** Variant IDs that minimize reasoning output, in preference order. */
+const MINIMAL_REASONING_VARIANTS = ["none", "minimal", "low"].map((id) => Model.VariantID.make(id))
+
 export const node = makeLocationNode({
   service: Service,
   layer,
   deps: [
     Agent.node,
+    Catalog.node,
     Database.node,
     InstructionBuiltIns.node,
     InstructionDiscovery.node,
@@ -143,6 +193,7 @@ export const node = makeLocationNode({
     PluginSupervisor.node,
     ReferenceInstructions.node,
     SessionRunnerModel.node,
+    SessionModelRequest.node,
     SessionStore.node,
     SkillInstructions.node,
     Tool.node,

packages/core/src/session/generate-node.ts

@@ -9,7 +9,6 @@ import { SessionContext } from "./context.js"
 import { SessionGenerate } from "./generate.js"
 import { SessionHistory } from "./history.js"
 import { SessionModelRequest } from "./model-request.js"
-import { SessionRunnerModel } from "./runner/model.js"
 
 export const layer = Layer.effect(
   SessionGenerate.Service,
@@ -17,13 +16,11 @@ export const layer = Layer.effect(
     const context = yield* SessionContext.Service
     const database = yield* Database.Service
     const llm = yield* LLMClient.Service
-    const models = yield* SessionRunnerModel.Service
-    const modelRequests = yield* SessionModelRequest.Service
 
     return SessionGenerate.Service.of({
       generate: Effect.fn("SessionGenerate.generate")(function* (input) {
         const selection = yield* context.select(input.sessionID)
-        const model = yield* models.resolve(selection.session)
+        const model = yield* context.resolveModel(selection.session)
         const history = yield* SessionHistory.preview(database.db, selection.session.id, selection.instructions)
         const transcript = SessionModelRequest.baseTranscript({
           agent: selection.agent.info,
@@ -32,7 +29,7 @@ export const layer = Layer.effect(
           initial: history.initial,
           messages: history.messages,
         })
-        const prepared = yield* modelRequests.prepare({
+        const prepared = yield* context.prepare({
           scope: { session: selection.session, agentID: selection.agent.id, model, tools: selection.tools },
           transcript: {
             system: transcript.system,
@@ -59,5 +56,5 @@ export const layer = Layer.effect(
 export const node = makeLocationNode({
   service: SessionGenerate.Service,
   layer,
-  deps: [SessionContext.node, Database.node, SessionModelRequest.node, SessionRunnerModel.node, llmClient],
+  deps: [SessionContext.node, Database.node, llmClient],
 })

packages/core/src/session/runner/llm.ts

@@ -36,7 +36,6 @@ const layer = Layer.effect(
     const bus = yield* Bus.Service
     const store = yield* SessionStore.Service
     const context = yield* SessionContext.Service
-    const modelRequests = yield* SessionModelRequest.Service
     const modelTransport = yield* SessionModelTransport.Service
     const db = (yield* Database.Service).db
     const compaction = yield* SessionCompaction.Service
@@ -142,6 +141,8 @@ const layer = Layer.effect(
                   Effect.gen(function* () {
                     return yield* compaction.compactManual({
                       session,
+                      resolveModel: context.resolveModel,
+                      prepare: context.prepare,
                       messages: yield* store.context(sessionID),
                       inputID: pending.id,
                       started: true,
@@ -215,7 +216,12 @@ const layer = Layer.effect(
         // Reuse boundary preparation once; retries refresh context without delivering more input.
         const loaded = initial ?? (yield* prepareContext(sessionID).pipe(Effect.flatMap(context.load)))
         initial = undefined
-        const compactionInput = { session: loaded.session, messages: loaded.messages, resolved: loaded.model }
+        const compactionInput = {
+          session: loaded.session,
+          messages: loaded.messages,
+          resolved: loaded.model,
+          prepare: context.prepare,
+        }
         if (compaction.required(compactionInput)) {
           const compacted = yield* compaction.compact(compactionInput)
           if (compacted.status !== "completed") return yield* new StepFailedError({ error: compacted.error })
@@ -230,7 +236,7 @@ const layer = Layer.effect(
           initial: loaded.initial,
           messages: loaded.messages,
         })
-        const prepared = yield* modelRequests.prepare({
+        const prepared = yield* context.prepare({
           scope: { session: loaded.session, agentID: loaded.agent.id, model: loaded.model, tools: loaded.tools },
           transcript: {
             system: transcript.system,
@@ -319,7 +325,6 @@ export const node = makeLocationNode({
     Bus.node,
     llmClient,
     SessionContext.node,
-    SessionModelRequest.node,
     SessionModelTransport.node,
     SessionStore.node,
     SessionCompaction.node,

packages/core/src/session/runner/model.ts

@@ -3,7 +3,6 @@ export * as SessionRunnerModel from "./model.js"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { LanguageModel } from "@opencode-ai/ai"
 import { Context, Effect, Layer, Schema } from "effect"
-import { Catalog } from "../../catalog.js"
 import { ModelResolver } from "../../model-resolver.js"
 import { Capabilities, ID, Info, Ref, VariantID } from "../../model.js"
 import { Provider } from "../../provider.js"
@@ -41,7 +40,11 @@ export type Error = ModelNotSelectedError | ModelUnavailableError | ModelResolve
 export type Resolved = ModelResolver.Resolved
 
 export interface Interface {
-  readonly resolve: (session: SessionSchema.Info) => Effect.Effect<Resolved, Error>
+  /** Availability is sampled lazily for each explicitly selected model resolution. */
+  readonly resolve: (
+    session: SessionSchema.Info,
+    available: () => Effect.Effect<ReadonlyArray<Info>>,
+  ) => Effect.Effect<Resolved, Error>
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/SessionRunnerModel") {}
@@ -70,17 +73,16 @@ export const resolved = (
 const layer = Layer.effect(
   Service,
   Effect.gen(function* () {
-    const catalog = yield* Catalog.Service
     const resolver = yield* ModelResolver.Service
     return Service.of({
-      resolve: Effect.fn("SessionRunnerModel.resolve")(function* (session) {
+      resolve: Effect.fn("SessionRunnerModel.resolve")(function* (session, available) {
         // Location plugins populate and filter the catalog asynchronously during layer startup.
         if (!session.model) {
           const resolved = yield* resolver.resolve()
           if (resolved) return resolved
           return yield* new ModelNotSelectedError({ sessionID: session.id })
         }
-        const selected = (yield* catalog.model.available()).find(
+        const selected = (yield* available()).find(
           (model) => model.providerID === session.model?.providerID && model.id === session.model.id,
         )
         if (!selected)
@@ -94,4 +96,4 @@ const layer = Layer.effect(
   }),
 )
 
-export const node = makeLocationNode({ service: Service, layer, deps: [Catalog.node, ModelResolver.node] })
+export const node = makeLocationNode({ service: Service, layer, deps: [ModelResolver.node] })

packages/core/src/session/runner/to-llm-message.ts

@@ -157,6 +157,7 @@ const assistant = (message: SessionMessage.Assistant, model: Model.Ref, provider
           providerMetadata: reuseProviderMetadata ? providerMetadata(providerMetadataKey, item.state) : undefined,
         },
       ]
+    // Let the destination adapter handle readable reasoning after a model/provider switch.
     if (item.type === "reasoning")
       return reuseProviderMetadata
         ? [
@@ -167,7 +168,7 @@ const assistant = (message: SessionMessage.Assistant, model: Model.Ref, provider
             },
           ]
         : item.text.length > 0
-          ? [{ type: "text", text: item.text }]
+          ? [{ type: message.error === undefined ? "reasoning" : "text", text: item.text }]
           : []
     // Call-side metadata is model-scoped proof of generation (Gemini thought
     // signatures, OpenAI encrypted reasoning): only the producing model may

packages/core/src/session/title.ts

@@ -4,18 +4,16 @@ import { isDeepStrictEqual } from "node:util"
 import { LLMClient, AIError, LLMEvent, Message, SystemPart, type LLMRequest } from "@opencode-ai/ai"
 import type { StreamOptions } from "@opencode-ai/ai/route"
 import { Context, DateTime, Effect, Layer, Stream } from "effect"
-import { Agent } from "../agent.js"
-import { Catalog } from "../catalog.js"
+import type { Agent } from "../agent.js"
 import { Database } from "../database/database.js"
 import { Bus } from "../bus.js"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { isExactRootFallback } from "@opencode-ai/util/session-title-fallback"
 import { llmClient } from "../effect/app-node-platform.js"
-import { Model } from "../model.js"
+import { SessionContext } from "./context.js"
 import { SessionEvent } from "./event.js"
 import { SessionHistory } from "./history.js"
-import { SessionModelRequest } from "./model-request.js"
-import { SessionRunnerModel } from "./runner/model.js"
+import type { SessionRunnerModel } from "./runner/model.js"
 import { SessionSchema } from "./schema.js"
 import { SessionUsage } from "./usage.js"
 import { SessionStore } from "./store.js"
@@ -30,10 +28,7 @@ type Dependencies = {
   readonly llm: {
     readonly stream: (request: LLMRequest, options?: StreamOptions) => Stream.Stream<LLMEvent, AIError>
   }
-  readonly agents: Agent.Interface
-  readonly catalog: Catalog.Interface
-  readonly models: SessionRunnerModel.Interface
-  readonly modelRequests: SessionModelRequest.Interface
+  readonly context: SessionContext.Interface
   readonly store: SessionStore.Interface
 }
 
@@ -72,7 +67,7 @@ const attempt = Effect.fn("SessionTitle.attempt")(function* (
         })
       : Effect.void,
   )
-  const prepared = yield* dependencies.modelRequests.prepare({
+  const prepared = yield* dependencies.context.prepare({
     scope: { session: input.session, agentID: input.agent.id, model: input.model },
     transcript: {
       system: input.agent.system ? [SystemPart.make(input.agent.system)] : [],
@@ -106,9 +101,6 @@ const attempt = Effect.fn("SessionTitle.attempt")(function* (
     .find((line) => line.length > 0)
 })
 
-/** Variant IDs that minimize reasoning output, in preference order. */
-const MINIMAL_REASONING_VARIANTS = ["none", "minimal", "low"].map((id) => Model.VariantID.make(id))
-
 const make = (dependencies: Dependencies) => {
   const generate = Effect.fn("SessionTitle.generate")(function* (
     db: Database.Interface["db"],
@@ -140,34 +132,12 @@ const make = (dependencies: Dependencies) => {
           Effect.orElseSucceed(() => firstUser.text),
         )
       : firstUser.text
-    const agent = yield* dependencies.agents.get(Agent.ID.make("title"))
-    if (!agent) return
-    const primary = yield* dependencies.models.resolve(session).pipe(Effect.orElseSucceed(() => undefined))
-    const info = yield* Effect.gen(function* () {
-      if (agent.model) return yield* dependencies.catalog.model.get(agent.model.providerID, agent.model.id)
-      if (!primary) return
-      return yield* dependencies.catalog.model.small(primary.ref.providerID)
-    })
-    const variant =
-      agent.model?.variant ?? MINIMAL_REASONING_VARIANTS.find((id) => info?.variants.some((item) => item.id === id))
-    const preferred =
-      info &&
-      (yield* dependencies.models
-        .resolve({
-          ...session,
-          model: Model.Ref.make({
-            providerID: info.providerID,
-            id: info.id,
-            ...(variant ? { variant } : {}),
-          }),
-        })
-        .pipe(Effect.orElseSucceed(() => undefined)))
-    const selected = preferred ?? primary
-    if (!selected) return
+    const selection = yield* dependencies.context.selectTitle(session)
+    if (!selection) return
     const title =
-      (yield* attempt(dependencies, { session, agent, text, model: selected })) ??
-      (primary && !isDeepStrictEqual(selected.ref, primary.ref)
-        ? yield* attempt(dependencies, { session, agent, text, model: primary })
+      (yield* attempt(dependencies, { session, agent: selection.agent, text, model: selection.selected })) ??
+      (selection.primary && !isDeepStrictEqual(selection.selected.ref, selection.primary.ref)
+        ? yield* attempt(dependencies, { session, agent: selection.agent, text, model: selection.primary })
         : undefined)
     if (!title) return
     const expectedSequence = (yield* Bus.latestSequence(db, sessionID)) + 1
@@ -192,13 +162,10 @@ export const layer = Layer.effect(
   Effect.gen(function* () {
     const bus = yield* Bus.Service
     const llm = yield* LLMClient.Service
-    const agents = yield* Agent.Service
-    const catalog = yield* Catalog.Service
-    const models = yield* SessionRunnerModel.Service
-    const modelRequests = yield* SessionModelRequest.Service
+    const context = yield* SessionContext.Service
     const store = yield* SessionStore.Service
     const database = yield* Database.Service
-    const title = make({ bus, llm, agents, catalog, models, modelRequests, store })
+    const title = make({ bus, llm, context, store })
     return Service.of({
       generate: (sessionID) => title.generate(database.db, sessionID),
     })
@@ -208,14 +175,5 @@ export const layer = Layer.effect(
 export const node = makeLocationNode({
   service: Service,
   layer,
-  deps: [
-    Bus.node,
-    llmClient,
-    Agent.node,
-    Catalog.node,
-    SessionRunnerModel.node,
-    SessionModelRequest.node,
-    SessionStore.node,
-    Database.node,
-  ],
+  deps: [Bus.node, llmClient, SessionContext.node, SessionStore.node, Database.node],
 })

packages/core/src/shell/parse.ts

@@ -7,12 +7,17 @@ import path from "path"
 import type { Node } from "web-tree-sitter"
 import { shellParserWasm } from "#shell-parser-wasm"
 import { ShellSelect } from "./select.js"
+import { Wildcard } from "../util/wildcard.js"
 
 type Part = { type: string; text: string }
-type SourceToken = { raw: string; value: string }
 const CWD = new Set(["cd", "chdir", "popd", "pushd", "push-location", "set-location"])
 const POWERSHELL_PATH_FLAGS = new Set(["-literalpath", "-path"])
 
+export type Result = {
+  commands: Array<{ resource: string; save: string }>
+  directories: string[]
+}
+
 const ARITY: Record<string, number> = {
   cat: 1,
   cd: 1,
@@ -152,6 +157,7 @@ const ARITY: Record<string, number> = {
   "yarn dlx": 3,
   "yarn run": 3,
 }
+const PREFIX_LENGTH = Math.max(...Object.values(ARITY))
 
 export const scan = Effect.fnUntraced(function* (
   command: string,
@@ -159,7 +165,7 @@ export const scan = Effect.fnUntraced(function* (
   cwd: string,
   options?: { portable?: boolean },
 ) {
-  if (options?.portable) return yield* Effect.promise(() => scanPortable(command, shell, cwd))
+  if (options?.portable) return yield* scanPortable(command, shell, cwd)
   return yield* scanLegacy(command, shell, cwd)
 })
 
@@ -197,416 +203,65 @@ const scanLegacy = Effect.fnUntraced(function* (command: string, shell: string,
   )
 })
 
-async function scanPortable(command: string, shell: string, cwd: string) {
-  const { ShellScan } = await import("./scan.js")
+export const scanPortable = Effect.fnUntraced(function* (command: string, shell: string, cwd: string) {
+  const { ShellScan } = yield* Effect.tryPromise({
+    try: () => import("./scan.js"),
+    catch: (cause) => new Error(`Portable shell scanner failed to load: ${cause}`, { cause }),
+  })
   const powershell = ShellSelect.ps(shell)
   const result = powershell ? ShellScan.scanPowerShell(command) : ShellScan.scan(command)
-  if (result.kind === "opaque") return { commands: [{ resource: command, save: command }], directories: [] }
-  const carriage = powershell ? command.search(/\r(?!\n)/) : -1
-  if (carriage >= 0) return { commands: [], directories: [] }
+  if (result.kind === "opaque")
+    return yield* Effect.fail(new Error(`Portable shell scanner cannot analyze command: ${result.reason}`))
 
-  const parsed = result.commands.reduce(
-    (output, item) => {
-      const index = item[ShellScan.Nested] ? -1 : command.indexOf(item.resource, output.cursor)
-      const offset = item[ShellScan.Nested]
-        ? command.lastIndexOf(item.resource, output.cursor - 1)
-        : index < 0
-          ? command.indexOf(item.resource)
-          : index
-      if (index >= 0) output.cursor = index + item.resource.length
-      const before = command.slice(0, Math.max(0, offset))
-      const name = powershell ? item.words[0]?.toLowerCase() : item.words[0]
-      if (!name) return output
-      if (powershell && name === "<") return output
-      if (
-        powershell &&
-        name === "foreach-object" &&
-        item.words.some((word) => word.startsWith("{")) &&
-        !/\|\s*$/.test(before)
+  const output: Result = { commands: [], directories: [] }
+  for (const item of result.commands) {
+    // The legacy command walk skips declarations, not the substitutions within them.
+    if (item.declaration) continue
+    const words = item.redirectWordCount === undefined ? item.rawWords : item.rawWords.slice(0, item.redirectWordCount)
+    // The shipped PowerShell grammar treats bare statement-head foreach prefixes as control flow.
+    if (powershell && item.statementHead && /^foreach(?:-|$)/i.test(words[0] ?? "")) continue
+    const name = powershell ? words[0]?.toLowerCase() : words[0]
+    if (CWD.has(name)) {
+      output.directories.push(
+        ...directoryArgs(
+          words.flatMap((text): Part[] => {
+            const parameter = powershell ? /^(-(?:literalpath|path)):(.*)$/i.exec(text) : undefined
+            if (parameter)
+              return [
+                { type: "command_parameter", text: parameter[1] },
+                { type: "word", text: parameter[2] },
+              ]
+            return [{ type: powershell && text.startsWith("-") ? "command_parameter" : "word", text }]
+          }),
+          powershell,
+          cwd,
+          shell,
+        ),
       )
-        return output
-      const tokens = powershell ? powerShellSourceTokens(item.resource) : sourceTokens(item.resource)
-      const sourceHead = powershell ? item.words[0] : tokens.find((token) => token.value === item.words[0])?.raw
-      if (CWD.has(name) && (powershell || sourceHead === item.words[0])) {
-        output.directories.push(...portableDirectoryArgs(item.words, tokens, powershell, cwd, shell))
-        return output
-      }
-      const save = powershell ? powerShellSourcePrefix(tokens, item.words) : bashSourcePrefix(tokens, item.words)
-      output.commands.push({
-        resource: powershell ? item.resource : bashResource(item.resource, before),
-        save: `${save} *`,
-      })
-      return output
-    },
-    {
-      commands: [] as Array<{ resource: string; save: string }>,
-      directories: [] as string[],
-      cursor: 0,
-    },
-  )
-  return { commands: parsed.commands, directories: parsed.directories }
-}
-
-function bashResource(resource: string, before: string) {
-  if (!/(?:&&|\|\||\|&)\s*$|\|\s*$/.test(before)) return resource
-  const redirect = bashRedirect(resource)
-  return redirect < 0 ? resource : resource.slice(0, redirect).replace(/\d+$/, "").trim()
-}
-
-function bashRedirect(resource: string) {
-  let quote: "single" | "double" | undefined
-  for (let index = 0; index < resource.length; index++) {
-    const char = resource[index]
-    if (quote === "single") {
-      if (char === "'") quote = undefined
       continue
     }
-    if (char === "\\") {
-      index++
-      continue
-    }
-    if (char === '"') {
-      quote = quote === "double" ? undefined : "double"
-      continue
-    }
-    if (quote === "double") {
-      if (char === "$" && resource[index + 1] === "(") index = bashParenthesizedEnd(resource, index + 1)
-      else if (char === "`") index = bashBacktickEnd(resource, index)
-      continue
-    }
-    if (char === "'") {
-      quote = "single"
-      continue
-    }
-    if ((char === "$" || char === "<" || char === ">") && resource[index + 1] === "(") {
-      index = bashParenthesizedEnd(resource, index + 1)
-      continue
-    }
-    if (char === "`") {
-      index = bashBacktickEnd(resource, index)
-      continue
-    }
-    if (char === "<" || char === ">" || (char === "&" && resource[index + 1] === ">")) return index
+    const selected = prefix(words.slice(0, PREFIX_LENGTH))
+    const conventional = `${selected.join(" ")} *`
+    const end = item.wordEnds?.[selected.length - 1]
+    // Keep existing grants stable unless normalized spacing loses the original source boundary.
+    const save =
+      !powershell || end === undefined || Wildcard.match(item.resource, conventional)
+        ? conventional
+        : (() => {
+            const boundary =
+              item.wordEnds?.find(
+                (value) => value >= end && (value >= item.resource.length || /\s/.test(item.resource[value])),
+              ) ?? end
+            const separator = /^\s+(?:`(?:\r\n|\r|\n)\s*)?/.exec(item.resource.slice(boundary))?.[0]
+            return `${item.resource.slice(0, boundary)}${separator ?? " "}*`
+          })()
+    output.commands.push({
+      resource: item.resource,
+      save,
+    })
   }
-  return -1
-}
-
-function bashParenthesizedEnd(resource: string, start: number) {
-  let level = 1
-  let quote: "single" | "double" | undefined
-  for (let index = start + 1; index < resource.length; index++) {
-    const char = resource[index]
-    if (quote === "single") {
-      if (char === "'") quote = undefined
-      continue
-    }
-    if (char === "\\") {
-      index++
-      continue
-    }
-    if (char === '"') {
-      quote = quote === "double" ? undefined : "double"
-      continue
-    }
-    if (quote === "double") continue
-    if (char === "'") {
-      quote = "single"
-      continue
-    }
-    if (char === "(") level++
-    if (char === ")" && --level === 0) return index
-  }
-  return resource.length - 1
-}
-
-function bashBacktickEnd(resource: string, start: number) {
-  for (let index = start + 1; index < resource.length; index++) {
-    if (resource[index] === "\\") index++
-    else if (resource[index] === "`") return index
-  }
-  return resource.length - 1
-}
-
-function portableDirectoryArgs(
-  command: string[],
-  tokens: SourceToken[],
-  powershell: boolean,
-  cwd: string,
-  shell: string,
-) {
-  if (!powershell) {
-    const start = tokens.findIndex((token) => token.value === command[0])
-    if (start < 0) return []
-    return directoryArgs(
-      tokens.slice(start).map((token) => ({ type: "word", text: token.raw })),
-      false,
-      cwd,
-      shell,
-    )
-  }
-
-  const start = tokens.findIndex((token) => token.value.toLowerCase() === command[0]?.toLowerCase())
-  if (start < 0) return []
-  const directories: string[] = []
-  let expectsPath = false
-  for (const part of tokens.slice(start + 1).map((token) => token.raw)) {
-    if (expectsPath) {
-      const value = directoryArgument(part, true, cwd, shell)
-      if (value) directories.push(value)
-      expectsPath = false
-      continue
-    }
-    if (part.startsWith("-")) {
-      expectsPath = POWERSHELL_PATH_FLAGS.has(part.toLowerCase())
-      continue
-    }
-    const value = directoryArgument(part, true, cwd, shell)
-    if (value) directories.push(value)
-  }
-  return directories
-}
-
-function sourceTokens(resource: string) {
-  const tokens: SourceToken[] = []
-  let raw = ""
-  let value = ""
-  let quote: "single" | "double" | "backtick" | undefined
-  let substitution = 0
-  let redirect = false
-
-  const finish = () => {
-    if (!raw) return
-    if (!redirect) tokens.push({ raw, value })
-    raw = ""
-    value = ""
-    redirect = false
-  }
-
-  for (let index = 0; index < resource.length; index++) {
-    const char = resource[index]
-    if (quote === "single") {
-      raw += char
-      if (char === "'") quote = undefined
-      else value += char
-      continue
-    }
-    if (quote === "double") {
-      raw += char
-      if (char === '"') quote = undefined
-      else if (char === "\\" && index + 1 < resource.length) {
-        const next = resource[index + 1]
-        if ('$`"\\\n'.includes(next)) {
-          raw += resource[++index]
-          if (next !== "\n") value += next
-        } else value += char
-      } else value += char
-      continue
-    }
-    if (quote === "backtick") {
-      raw += char
-      value += char
-      if (char === "`" && resource[index - 1] !== "\\") quote = undefined
-      continue
-    }
-    if (char === "'") {
-      raw += char
-      quote = "single"
-      continue
-    }
-    if (char === '"') {
-      raw += char
-      quote = "double"
-      continue
-    }
-    if (char === "`") {
-      raw += char
-      value += char
-      quote = "backtick"
-      continue
-    }
-    if (char === "\\" && index + 1 < resource.length) {
-      if (resource[index + 1] === "\n") {
-        finish()
-        index++
-        continue
-      }
-      if (!raw && /\s/.test(resource[index + 1])) {
-        index++
-        continue
-      }
-      raw += char + resource[++index]
-      value += resource[index]
-      continue
-    }
-    if ((char === "<" || char === ">") && resource[index + 1] === "(") {
-      const end = bashParenthesizedEnd(resource, index + 1)
-      if (raw) {
-        raw += resource.slice(index, end + 1)
-        value += resource.slice(index, end + 1)
-      }
-      index = end
-      continue
-    }
-    if (char === "$" && resource[index + 1] === "(") substitution++
-    if (char === ")" && substitution > 0) substitution--
-    if (substitution === 0 && /\s/.test(char)) {
-      finish()
-      continue
-    }
-    if (substitution === 0 && (char === "<" || char === ">" || (char === "&" && resource[index + 1] === ">"))) {
-      if (/^\d+$/.test(value)) {
-        raw = ""
-        value = ""
-      } else finish()
-      redirect = true
-      if (char === "&") index++
-      while (/[<>&|]/.test(resource[index + 1] ?? "")) index++
-      continue
-    }
-    raw += char
-    value += char
-  }
-  finish()
-
-  return tokens
-}
-
-function bashSourcePrefix(tokens: SourceToken[], words: string[]) {
-  const start = tokens.findIndex((token) => token.value === words[0])
-  if (start < 0) {
-    const command = tokens.findIndex((token) => !/^[A-Za-z_][A-Za-z0-9_]*\+?=/.test(token.raw))
-    return prefix(tokens.slice(Math.max(0, command)).map((token) => token.raw)).join(" ")
-  }
-  const source = tokens
-    .slice(start)
-    .map((token) => token.raw)
-    .filter((token) => !/^\$\([\s\S]*\)$/.test(token) && !/^`[\s\S]*`$/.test(token))
-  return prefix(source).join(" ")
-}
-
-function powerShellSourcePrefix(tokens: SourceToken[], words: string[]) {
-  const start = tokens.findIndex((token) => token.value.toLowerCase() === words[0]?.toLowerCase())
-  if (start < 0) return prefix(words).join(" ")
-  return prefix(tokens.slice(start).map((token) => token.raw)).join(" ")
-}
-
-function powerShellSourceTokens(resource: string) {
-  const tokens: SourceToken[] = []
-  let raw = ""
-  let value = ""
-  let quote: "single" | "double" | undefined
-  let redirect = false
-
-  const finish = () => {
-    if (!raw) return
-    if (!redirect) tokens.push({ raw, value })
-    raw = ""
-    value = ""
-    redirect = false
-  }
-
-  for (let index = 0; index < resource.length; index++) {
-    const char = resource[index]
-    if (quote === "single") {
-      raw += char
-      if (char === "'" && resource[index + 1] === "'") {
-        raw += resource[++index]
-        value += "'"
-      } else if (char === "'") quote = undefined
-      else value += char
-      continue
-    }
-    if (quote === "double") {
-      raw += char
-      if (char === '"') quote = undefined
-      else if (char === "`" && index + 1 < resource.length) {
-        raw += resource[++index]
-        value += resource[index]
-      } else value += char
-      continue
-    }
-    if (char === "'") {
-      raw += char
-      quote = "single"
-      continue
-    }
-    if (char === '"') {
-      raw += char
-      quote = "double"
-      continue
-    }
-    if (char === "`" && index + 1 < resource.length) {
-      raw += char + resource[++index]
-      if (resource[index] !== "\n" && resource[index] !== "\r") value += resource[index]
-      continue
-    }
-    if (char === "{" && !raw) {
-      const end = powerShellBracedEnd(resource, index)
-      raw = resource.slice(index, end + 1)
-      value = raw
-      index = end
-      continue
-    }
-    if (/\s/.test(char)) {
-      finish()
-      continue
-    }
-    if (char === ">") {
-      if (resource[index + 1] && !/[\s>&]/.test(resource[index + 1])) {
-        raw += char
-        value += char
-        continue
-      }
-      if (/^\d+$/.test(value)) {
-        raw = ""
-        value = ""
-      } else if (raw === "*") {
-        raw = ""
-        value = ""
-      } else finish()
-      redirect = true
-      while (/[>&\d]/.test(resource[index + 1] ?? "")) index++
-      continue
-    }
-    if ((char === "&" || char === ".") && !raw && tokens.length === 0) continue
-    raw += char
-    value += char
-  }
-  finish()
-  return tokens
-}
-
-function powerShellBracedEnd(resource: string, start: number) {
-  let level = 1
-  let quote: "single" | "double" | undefined
-  for (let index = start + 1; index < resource.length; index++) {
-    const char = resource[index]
-    if (char === "`" && quote !== "single") {
-      index++
-      continue
-    }
-    if (quote === "single") {
-      if (char === "'" && resource[index + 1] === "'") index++
-      else if (char === "'") quote = undefined
-      continue
-    }
-    if (quote === "double") {
-      if (char === '"') quote = undefined
-      continue
-    }
-    if (char === "'") {
-      quote = "single"
-      continue
-    }
-    if (char === '"') {
-      quote = "double"
-      continue
-    }
-    if (char === "{") level++
-    if (char === "}" && --level === 0) return index
-  }
-  return resource.length - 1
-}
+  return output
+})
 
 function parts(node: Node) {
   return Array.from({ length: node.childCount }).flatMap((_, index): Part[] => {

packages/core/src/tool.ts

@@ -4,7 +4,7 @@ export type { Context, Metadata, Options, Result } from "@opencode-ai/schema/too
 
 import { ToolDefinition, type ToolCall } from "@opencode-ai/ai"
 import { Tool } from "@opencode-ai/schema/tool"
-import { Context, Effect, Layer, Schema, SchemaIssue, Scope, Semaphore } from "effect"
+import { Context, Effect, Layer, Result, Schema, SchemaIssue, Types } from "effect"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import type { Agent } from "./agent.js"
 import { CodeModeCatalog } from "./codemode/catalog.js"
@@ -14,6 +14,7 @@ import { Permission } from "./permission.js"
 import { PluginHooks } from "./plugin/hooks.js"
 import { SessionMessage } from "./session/message.js"
 import { SessionSchema } from "./session/schema.js"
+import { State } from "./state.js"
 import { definition, execute, normalizeContent } from "./tool/runtime.js"
 import { Wildcard } from "./util/wildcard.js"
 
@@ -22,10 +23,20 @@ export class RegistrationError extends Schema.TaggedError<RegistrationError>()("
   message: Schema.String,
 }) {}
 
-export interface Interface {
-  readonly transform: (
-    callback: (draft: { readonly add: (tool: Tool.Info) => void }) => void,
-  ) => Effect.Effect<void, never, Scope.Scope>
+export interface Draft {
+  readonly list: () => readonly (Tool.Info & { readonly id: string })[]
+  readonly get: (id: string) => (Tool.Info & { readonly id: string }) | undefined
+  readonly add: (tool: Tool.Info) => void
+  readonly update: (id: string, update: (tool: Types.Mutable<Tool.Info>) => void) => void
+  readonly remove: (id: string) => void
+}
+
+type Data = {
+  tools: Map<string, Tool.Info & { readonly id: string }>
+  errors: { tool: Tool.Info; error: RegistrationError }[]
+}
+
+export interface Interface extends State.Transformable<Draft> {
   readonly snapshot: (permissions?: Permission.Ruleset) => Effect.Effect<Snapshot>
 }
 
@@ -79,9 +90,6 @@ const layer = Layer.effect(
       ]
     })
 
-    const local = new Map<string, Array<{ readonly token: object; readonly tool: Tool.Info }>>()
-    const lock = Semaphore.makeUnsafe(1)
-
     const executeTool = Effect.fn("Tool.execute")(function* (
       tool: Tool.Info,
       name: string,
@@ -137,112 +145,106 @@ const layer = Layer.effect(
       }
     })
 
-    const transform: Interface["transform"] = Effect.fn("Tool.transform")(function* (callback) {
-      const tools: Array<Tool.Info> = []
-      yield* Effect.sync(() => callback({ add: (tool) => tools.push(tool) }))
-      const valid = yield* Effect.filter(normalizedEntries(tools), (entry) =>
-        Effect.gen(function* () {
-          if (entry.tool.options?.namespace !== undefined) yield* validateNamespace(entry.tool.options.namespace)
-          yield* validateName(normalizedName(entry.tool))
-          if (entry.tool.options?.codemode === false && entry.key === "execute")
-            return yield* new RegistrationError({
-              name: entry.key,
-              message: 'Tool name "execute" is reserved for CodeMode',
-            })
-          yield* Effect.try({
-            try: () => ToolDefinition.make(definition(entry.tool)),
-            catch: (error) =>
-              new RegistrationError({
-                name: entry.key,
-                message: `Invalid tool definition ${entry.key}: ${schemaMakeError(error)}`,
-              }),
-          })
-          return true
-        }).pipe(Effect.catchTag("Tool.RegistrationError", (error) => skipRegistration(entry.tool, error))),
-      )
-      // Reject every ambiguous entry rather than choosing a winner.
-      const entries = yield* Effect.filter(valid, (entry) => {
-        if (!valid.some((candidate) => candidate !== entry && candidate.key === entry.key)) return Effect.succeed(true)
-        return skipRegistration(
-          entry.tool,
-          new RegistrationError({ name: entry.key, message: `Duplicate normalized tool name: ${entry.key}` }),
-        )
-      })
-      if (entries.length === 0) return
-      yield* Effect.uninterruptible(
-        lock.withPermit(
-          Effect.gen(function* () {
-            const token = {}
-            for (const entry of entries)
-              local.set(entry.key, [...(local.get(entry.key) ?? []), { token, tool: entry.tool }])
-            yield* Effect.addFinalizer(() =>
-              lock.withPermit(
-                Effect.sync(() => {
-                  for (const entry of entries) {
-                    const remaining = local.get(entry.key)?.filter((item) => item.token !== token) ?? []
-                    if (remaining.length > 0) local.set(entry.key, remaining)
-                    else local.delete(entry.key)
-                  }
-                }),
-              ),
-            )
-          }),
+    const state: State.Interface<Data, Draft> = State.create<Data, Draft>({
+      name: "tool",
+      initial: () => ({
+        tools: new Map(),
+        errors: [],
+      }),
+      draft: (draft) => ({
+        list: () => Array.from(draft.tools.values()),
+        get: (id) => draft.tools.get(id),
+        add: (tool) => {
+          const error = registrationError(tool)
+          if (error) {
+            draft.errors.push({ tool, error })
+            return
+          }
+          const id = effectiveName(tool)
+          draft.tools.set(id, { ...tool, id, options: tool.options && { ...tool.options } })
+        },
+        update: (id, update) => {
+          const current = draft.tools.get(id)
+          if (!current) return
+          const tool = { ...current, options: current.options && { ...current.options } }
+          update(tool)
+          tool.name = current.name
+          tool.id = id
+          if (tool.options?.namespace !== current.options?.namespace)
+            tool.options = { ...tool.options, namespace: current.options?.namespace }
+          const error = registrationError(tool)
+          if (error) {
+            draft.errors.push({ tool, error })
+            return
+          }
+          draft.tools.set(id, tool)
+        },
+        remove: (id) => {
+          draft.tools.delete(id)
+        },
+      }),
+      finalize: () =>
+        Effect.forEach(
+          state.get().errors,
+          ({ tool, error }) =>
+            Effect.logError("Skipping invalid tool registration", {
+              name: tool.name,
+              namespace: tool.options?.namespace,
+              error: error.message,
+            }),
+          { discard: true },
         ),
-      )
     })
 
     return Service.of({
-      transform,
+      transform: state.transform,
+      reload: state.reload,
       snapshot: Effect.fn("Tool.snapshot")((permissions) =>
-        lock.withPermit(
-          Effect.gen(function* () {
-            const active = new Map<string, Tool.Info>()
-            const rules = permissions ?? []
-            for (const [name, entries] of local) {
-              const tool = entries.at(-1)?.tool
-              if (!tool) continue
-              if (whollyDisabled(tool.options?.permission ?? name, rules)) continue
-              active.set(name, tool)
-            }
-            const direct = new Map(Array.from(active).filter(([, tool]) => tool.options?.codemode === false))
-            const codemode = new Map(Array.from(active).filter(([, tool]) => tool.options?.codemode !== false))
-            const executeRule = rules.findLast((rule) => Wildcard.match("execute", rule.action))
-            const codemodeEnabled = executeRule?.resource !== "*" || executeRule.effect !== "deny"
-            const codemodeTool = codemodeEnabled
-              ? CodeModeTool.create(codemode, (name, tool, input, context) => executeTool(tool, name, input, context))
-              : undefined
-            const codeModeCatalog = codemodeEnabled ? CodeModeTool.catalog(codemode) : undefined
-            return {
-              ...(codeModeCatalog === undefined ? {} : { codeModeCatalog }),
-              definitions: [
-                ...Array.from(direct)
-                  .sort(([left], [right]) => (left < right ? -1 : left > right ? 1 : 0))
-                  .map(([, tool]) => definition(tool)),
-                ...(codemodeTool ? [definition(codemodeTool)] : []),
-              ],
-              execute: (input: {
-                readonly sessionID: SessionSchema.ID
-                readonly agent: Agent.ID
-                readonly messageID: SessionMessage.ID
-                readonly call: ToolCall
-                readonly progress?: (update: Tool.Metadata) => Effect.Effect<void>
-              }) => {
-                const context: Tool.Context = {
-                  sessionID: input.sessionID,
-                  agent: input.agent,
-                  messageID: input.messageID,
-                  id: Tool.CallID.make(input.call.id),
-                  progress: input.progress ?? (() => Effect.void),
-                }
-                if (input.call.name === "execute" && codemodeTool)
-                  return executeTool(codemodeTool, input.call.name, input.call.input, context)
-                const tool = direct.get(input.call.name)
-                if (tool) return executeTool(tool, input.call.name, input.call.input, context)
-                return new Tool.Error({ message: `Unknown tool: ${input.call.name}` })
-              },
-            }
-          }),
-        ),
+        Effect.sync(() => {
+          const active = new Map<string, Tool.Info>()
+          const rules = permissions ?? []
+          for (const [name, tool] of state.get().tools) {
+            if (whollyDisabled(tool.options?.permission ?? name, rules)) continue
+            active.set(name, tool)
+          }
+          const direct = new Map(Array.from(active).filter(([, tool]) => tool.options?.codemode === false))
+          const codemode = new Map(Array.from(active).filter(([, tool]) => tool.options?.codemode !== false))
+          const executeRule = rules.findLast((rule) => Wildcard.match("execute", rule.action))
+          const codemodeEnabled = executeRule?.resource !== "*" || executeRule.effect !== "deny"
+          const codemodeTool = codemodeEnabled
+            ? CodeModeTool.create(codemode, (name, tool, input, context) => executeTool(tool, name, input, context))
+            : undefined
+          const codeModeCatalog = codemodeEnabled ? CodeModeTool.catalog(codemode) : undefined
+          return {
+            ...(codeModeCatalog === undefined ? {} : { codeModeCatalog }),
+            definitions: [
+              ...Array.from(direct)
+                .sort(([left], [right]) => (left < right ? -1 : left > right ? 1 : 0))
+                .map(([, tool]) => definition(tool)),
+              ...(codemodeTool ? [definition(codemodeTool)] : []),
+            ],
+            execute: (input: {
+              readonly sessionID: SessionSchema.ID
+              readonly agent: Agent.ID
+              readonly messageID: SessionMessage.ID
+              readonly call: ToolCall
+              readonly progress?: (update: Tool.Metadata) => Effect.Effect<void>
+            }) => {
+              const context: Tool.Context = {
+                sessionID: input.sessionID,
+                agent: input.agent,
+                messageID: input.messageID,
+                id: Tool.CallID.make(input.call.id),
+                progress: input.progress ?? (() => Effect.void),
+              }
+              if (input.call.name === "execute" && codemodeTool)
+                return executeTool(codemodeTool, input.call.name, input.call.input, context)
+              const tool = direct.get(input.call.name)
+              if (tool) return executeTool(tool, input.call.name, input.call.input, context)
+              return new Tool.Error({ message: `Unknown tool: ${input.call.name}` })
+            },
+          }
+        }),
       ),
     })
   }),
@@ -260,27 +262,22 @@ function schemaMakeError(error: unknown) {
   return error instanceof Error ? error.message : String(error)
 }
 
-const skipRegistration = (tool: Tool.Info, error: RegistrationError) =>
-  Effect.logError("Skipping invalid tool registration", {
-    name: tool.name,
-    namespace: tool.options?.namespace,
-    error: error.message,
-  }).pipe(Effect.as(false))
-
-const validateName = (name: string) =>
-  /^[A-Za-z0-9_-]{1,64}$/.test(name)
-    ? Effect.void
-    : Effect.fail(new RegistrationError({ name, message: `Invalid tool name: ${name}` }))
-
-const validateNamespace = (namespace: string) =>
-  namespace.split(".").every((segment) => /^[A-Za-z0-9_-]{1,64}$/.test(segment))
-    ? Effect.void
-    : Effect.fail(
-        new RegistrationError({
-          name: namespace,
-          message: `Invalid tool namespace: ${JSON.stringify(namespace)}`,
-        }),
-      )
+function registrationError(tool: Tool.Info) {
+  const namespace = tool.options?.namespace
+  if (namespace !== undefined && !namespace.split(".").every((segment) => /^[A-Za-z0-9_-]{1,64}$/.test(segment)))
+    return new RegistrationError({ name: namespace, message: `Invalid tool namespace: ${JSON.stringify(namespace)}` })
+  const name = normalizedName(tool)
+  if (!/^[A-Za-z0-9_-]{1,64}$/.test(name)) return new RegistrationError({ name, message: `Invalid tool name: ${name}` })
+  const id = effectiveName(tool)
+  if (tool.options?.codemode === false && id === "execute")
+    return new RegistrationError({ name: id, message: 'Tool name "execute" is reserved for CodeMode' })
+  const result = Result.try({
+    try: () => ToolDefinition.make(definition(tool)),
+    catch: (error) =>
+      new RegistrationError({ name: id, message: `Invalid tool definition ${id}: ${schemaMakeError(error)}` }),
+  })
+  return Result.isFailure(result) ? result.failure : undefined
+}
 
 const normalizedName = (tool: Tool.Info) => tool.name.replace(/[^a-zA-Z0-9_-]/g, "_")
 
@@ -289,12 +286,6 @@ const effectiveName = (tool: Tool.Info) =>
     ? normalizedName(tool)
     : `${tool.options.namespace.replaceAll(".", "_")}_${normalizedName(tool)}`
 
-const normalizedEntries = (tools: ReadonlyArray<Tool.Info>) =>
-  tools.map((tool) => ({
-    key: effectiveName(tool),
-    tool,
-  }))
-
 export const node = makeLocationNode({
   service: Service,
   layer,

packages/core/src/tool/AGENTS.md

@@ -30,17 +30,20 @@ Leaves own resolution, permission, and side-effect ordering. Translate only expe
 
 ## Registration
 
-Built-ins, plugins, and MCP install tools through `ToolRegistry.Service.transform`, adding complete tool objects to the draft. A tool may provide a namespace, which flattens direct model names to `<namespace>_<tool>`, and defaults into CodeMode (`codemode` defaults true; `codemode: false` keeps the tool on the provider's native tool list).
+Built-ins, plugins, and MCP install tools through `Tool.Service.transform`, adding complete tool objects to the draft. A tool may provide a namespace, which flattens direct model names to `<namespace>_<tool>`, and defaults into CodeMode (`codemode` defaults true; `codemode: false` keeps the tool on the provider's native tool list).
 
-Registrations are scoped:
+The service uses shared `State` to replay synchronous transforms in registration order against a fresh draft. `Tool.Service.reload()` rebuilds from captured source data without changing registration precedence. Registrations are scoped and return a real, idempotent `dispose` Effect:
 
-- The latest active same-placement registration wins.
-- Closing any registration removes only that registration and reveals the next active one.
-- Each model request captures the effective tools it advertises; later registration changes affect later requests.
+- The latest valid active registration for the same effective name wins.
+- `update` and `remove` target effective names and do nothing for missing tools. Updates preserve the name and namespace; invalid updates leave the previous definition intact. Creating a tool requires `add`.
+- Disposing a registration or closing its scope removes only its transform and rebuilds from the remaining transforms, revealing any earlier definition it overrode.
+- Each model request captures the effective definitions and executors it advertises; later reloads and disposal affect later snapshots. Captured executors may still reference mutable producer-owned state.
+
+MCP owns one stable tool transform that reads its latest discovered tools. Tool-list changes update that source and reload the tool state instead of re-registering at the end of the transform order. MCP refresh therefore preserves the precedence of later plugin overrides.
 
 Type safety ends at registration. The registry validates model input and declared output at runtime and should not carry producer schema generics through storage or execution.
 
-`ToolRegistry.Service` is Location-scoped. Do not make the registry process-global or construct a separate application-tool service for each Location.
+`Tool.Service` is Location-scoped. Do not make the registry process-global or construct a separate application-tool service for each Location.
 
 ## Permissions
 
@@ -56,4 +59,4 @@ Producer capture limits remain local to producers. For example, Bash keeps `AppP
 
 ## Current Gaps
 
-- MCP and future Session-scoped registrations still need an explicit canonical registration design.
+- Future Session-scoped registrations still need an explicit canonical registration design.

packages/core/src/tool/mcp.ts

@@ -2,7 +2,7 @@ export * as McpTool from "./mcp.js"
 
 import { ToolFailure } from "@opencode-ai/ai"
 import { McpEvent } from "@opencode-ai/schema/mcp-event"
-import { Context, Effect, Exit, Fiber, type JsonSchema, Layer, Scope, Semaphore, Stream } from "effect"
+import { Context, Effect, Fiber, type JsonSchema, Layer, Semaphore, Stream } from "effect"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { Bus } from "../bus.js"
 
@@ -30,18 +30,15 @@ export const layer = Layer.effect(
     const tools = yield* Tool.Service
     const bus = yield* Bus.Service
     const permission = yield* Permission.Service
-    const scope = yield* Scope.Scope
     const lock = Semaphore.makeUnsafe(1)
-    let current: Scope.Closeable | undefined
+    let discovered: MCP.Tool[] = []
 
-    // Register the current tool set under a fresh child scope, then close the previous one so the
-    // registry never has a gap where MCP tools disappear mid-swap.
-    const reconcile = lock.withPermit(
-      Effect.gen(function* () {
-        const discovered = yield* mcp.tools()
-        const next = yield* Scope.fork(scope)
-        yield* tools
-          .transform((draft) => {
+    // Register once after initial discovery; only subsequent updates need a debounced reload.
+    const initial = yield* lock
+      .withPermit(
+        Effect.gen(function* () {
+          discovered = yield* mcp.tools()
+          yield* tools.transform((draft) => {
             for (const tool of discovered) {
               const schema = (tool.inputSchema ?? {}) as JsonSchema.JsonSchema
               draft.add({
@@ -115,15 +112,19 @@ export const layer = Layer.effect(
               })
             }
           })
-          .pipe(Scope.provide(next))
-        if (current) yield* Scope.close(current, Exit.void)
-        current = next
+        }),
+      )
+      .pipe(Effect.forkScoped)
+    const reconcile = lock.withPermit(
+      Effect.gen(function* () {
+        discovered = yield* mcp.tools()
+        yield* tools.reload()
       }),
     )
 
-    const initial = yield* reconcile.pipe(Effect.forkScoped)
     yield* bus.subscribe(McpEvent.ToolsChanged).pipe(
-      Stream.runForEach(() => reconcile),
+      // Each read loads the whole catalog, so queued notifications need only one refresh.
+      Stream.runForEachArray(() => reconcile),
       Effect.forkScoped({ startImmediately: true }),
     )
     return Service.of({ flush: Effect.asVoid(Fiber.await(initial)) })

packages/core/test/aisdk-native.test.ts

@@ -222,9 +222,11 @@ describe("AISDKNative", () => {
       },
       headers: { "x-test": "value" },
     })
-    expect(map("@ai-sdk/amazon-bedrock/mantle", settings, "openai.gpt-oss-safeguard-20b")?.package).toBe(
-      "@opencode-ai/ai/providers/amazon-bedrock/mantle/chat",
-    )
+    for (const modelID of ["openai.gpt-oss-safeguard-20b", "openai.gpt-oss-safeguard-120b"]) {
+      expect(map("@ai-sdk/amazon-bedrock/mantle", settings, modelID)?.package).toBe(
+        "@opencode-ai/ai/providers/amazon-bedrock/mantle/chat",
+      )
+    }
     expect(
       map(
         "@ai-sdk/amazon-bedrock/mantle",

packages/core/test/bus-session-routing.test.ts

@@ -0,0 +1,336 @@
+import { describe, expect } from "bun:test"
+import { Deferred, Effect, Exit, Fiber, Stream } from "effect"
+import { eq } from "drizzle-orm"
+import { Bus } from "@opencode-ai/core/bus"
+import { Database } from "@opencode-ai/core/database/database"
+import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
+import { Location } from "@opencode-ai/core/location"
+import { ProjectTable } from "@opencode-ai/core/project/sql"
+import { SessionProjector } from "@opencode-ai/core/session/projector"
+import { SessionMessageTable, SessionTable } from "@opencode-ai/core/session/sql"
+import { Event } from "@opencode-ai/schema/event"
+import { Project } from "@opencode-ai/schema/project"
+import { AbsolutePath } from "@opencode-ai/schema/schema"
+import { SessionID } from "@opencode-ai/schema/session-id"
+import { SessionEvent } from "@opencode-ai/schema/session-event"
+import { SessionMessage } from "@opencode-ai/schema/session-message"
+import { WorkspaceID } from "@opencode-ai/schema/workspace-id"
+import { LayerNode } from "@opencode-ai/util/effect/layer-node"
+import { location } from "./fixture/location"
+import { testEffect } from "./lib/effect"
+
+const it = testEffect(
+  AppNodeBuilder.build(LayerNode.group([Database.node, Bus.node, SessionProjector.node]), [
+    [Bus.node, Bus.configured({ persist: true })],
+  ]),
+)
+const a = Location.Ref.make({ directory: AbsolutePath.make("/a") })
+const b = Location.Ref.make({ directory: AbsolutePath.make("/b") })
+const otherWorkspace = Location.Ref.make({ directory: a.directory, workspaceID: WorkspaceID.make("wrk_other") })
+const id = SessionID.make("ses_routing")
+const Done = Bus.ephemeral({ type: "test.routing.done", schema: {} })
+const Global = Bus.ephemeral({ type: "test.routing.global", schema: { sessionID: SessionID } })
+
+const seed = Effect.fn(function* (ref: Location.Ref = a) {
+  const database = yield* Database.Service
+  yield* database.db.insert(ProjectTable).values({ id: Project.ID.global, worktree: a.directory, sandboxes: [] }).run()
+  yield* database.db
+    .insert(SessionTable)
+    .values({
+      id,
+      project_id: Project.ID.global,
+      directory: ref.directory,
+      workspace_id: ref.workspaceID,
+      slug: "routing",
+      version: "test",
+    })
+    .run()
+})
+
+const watch = (bus: Bus.Interface, ref?: Location.Ref, gate?: Deferred.Deferred<void>) => {
+  const collect = bus.subscribe().pipe(
+    Stream.takeUntil((event) => event.type === Done.type),
+    Stream.mapEffect((event) => (gate ? Deferred.await(gate).pipe(Effect.as(event)) : Effect.succeed(event))),
+    Stream.runCollect,
+  )
+  return (ref ? collect.pipe(Effect.provideService(Location.Service, location(ref))) : collect).pipe(
+    Effect.forkScoped({ startImmediately: true }),
+  )
+}
+
+const delta = (bus: Bus.Interface) =>
+  bus.publish(SessionEvent.Text.Delta, {
+    sessionID: id,
+    assistantMessageID: SessionMessage.ID.make("msg_routing"),
+    ordinal: 0,
+    delta: "text",
+  })
+
+describe("Bus Session routing", () => {
+  it.effect("delivers workspace-only moves to both owners without duplicating same-location moves", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      const first = yield* watch(bus, a)
+      const second = yield* watch(bus, otherWorkspace)
+      const moved = yield* bus.publish(
+        SessionEvent.Moved,
+        { sessionID: id, location: otherWorkspace, projectID: Project.ID.global },
+        { location: a },
+      )
+      const after = yield* delta(bus)
+      const same = yield* bus.publish(SessionEvent.Moved, {
+        sessionID: id,
+        location: otherWorkspace,
+        projectID: Project.ID.global,
+      })
+      const done = yield* bus.publish(Done, {})
+      expect(Array.from(yield* Fiber.join(first))).toEqual([moved, done])
+      expect(Array.from(yield* Fiber.join(second))).toEqual([moved, after, same, done])
+      expect(moved.location).toEqual(a)
+    }),
+  )
+
+  it.effect("routes forks through their parent before the child exists", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      const database = yield* Database.Service
+      yield* bus.publish(SessionEvent.Synthetic, { sessionID: id, text: "Fork boundary" })
+      const boundary = yield* database.db
+        .select({ id: SessionMessageTable.id })
+        .from(SessionMessageTable)
+        .where(eq(SessionMessageTable.session_id, id))
+        .get()
+      if (!boundary) return yield* Effect.die("Missing fork boundary")
+
+      yield* Effect.forEach(["publish", "batch", "replay"] as const, (mode) =>
+        Effect.gen(function* () {
+          const child = SessionID.create()
+          const first = yield* watch(bus, a)
+          const second = yield* watch(bus, b)
+          const payload = {
+            sessionID: child,
+            parentID: id,
+            boundary: { type: "before" as const, messageID: boundary.id },
+          }
+          const eventID = Event.ID.create()
+          if (mode === "publish") yield* bus.publish(SessionEvent.Forked, payload, { id: eventID })
+          if (mode === "batch") yield* bus.publishAll([[SessionEvent.Forked, payload, { id: eventID }]])
+          if (mode === "replay")
+            yield* bus.replay(
+              {
+                id: eventID,
+                type: Bus.versionedType(SessionEvent.Forked.type, 2),
+                seq: 0,
+                aggregateID: child,
+                data: payload,
+              },
+              { publish: true },
+            )
+          const after = yield* bus.publish(SessionEvent.Execution.Succeeded, { sessionID: child })
+          const done = yield* bus.publish(Done, {})
+          expect(Array.from(yield* Fiber.join(first)).map((event) => event.id)).toEqual([eventID, after.id, done.id])
+          expect(Array.from(yield* Fiber.join(second))).toEqual([done])
+        }),
+      )
+    }),
+  )
+
+  it.effect("routes existing Sessions without changing public events or global delivery", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      const first = yield* watch(bus, a)
+      const second = yield* watch(bus, b)
+      const workspace = yield* watch(bus, otherWorkspace)
+      const global = yield* watch(bus)
+      const listened: Event.Payload[] = []
+      yield* bus.listen((event) =>
+        Effect.sync(() => {
+          listened.push(event)
+        }),
+      )
+
+      const renamed = yield* bus.publish(SessionEvent.Renamed, { sessionID: id, title: "first" })
+      const text = yield* delta(bus)
+      const broadcast = yield* bus.publish(Global, { sessionID: id })
+      const explicit = yield* bus.publish(SessionEvent.Execution.Succeeded, { sessionID: id }, { location: b })
+      const done = yield* bus.publish(Done, {})
+
+      expect(Array.from(yield* Fiber.join(first))).toEqual([renamed, text, broadcast, done])
+      expect(Array.from(yield* Fiber.join(second))).toEqual([broadcast, explicit, done])
+      expect(Array.from(yield* Fiber.join(workspace))).toEqual([broadcast, done])
+      expect(Array.from(yield* Fiber.join(global))).toEqual([renamed, text, broadcast, explicit, done])
+      expect(listened).toEqual([renamed, text, broadcast, explicit, done])
+      expect(renamed).not.toHaveProperty("location")
+      expect(text).not.toHaveProperty("location")
+      expect(JSON.parse(JSON.stringify(renamed))).not.toHaveProperty("location")
+      const history = yield* bus.log({ aggregateID: id }).pipe(Stream.runCollect)
+      expect(
+        Array.from(history)
+          .filter((event): event is Event.Payload => !Bus.isSynced(event))
+          .every((event) => !event.location),
+      ).toBe(true)
+    }),
+  )
+
+  it.effect("applies the same routing to typed and multi-type subscriptions", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      const typed = yield* bus
+        .subscribe(SessionEvent.Renamed)
+        .pipe(
+          Stream.take(1),
+          Stream.runCollect,
+          Effect.provideService(Location.Service, location(b)),
+          Effect.forkScoped({ startImmediately: true }),
+        )
+      const multiple = yield* bus.subscribe([SessionEvent.Renamed, Done]).pipe(
+        Stream.takeUntil((event) => event.type === Done.type),
+        Stream.runCollect,
+        Effect.provideService(Location.Service, location(b)),
+        Effect.forkScoped({ startImmediately: true }),
+      )
+      yield* bus.publish(SessionEvent.Renamed, { sessionID: id, title: "wrong location" })
+      yield* bus.publish(SessionEvent.Moved, { sessionID: id, location: b, projectID: Project.ID.global })
+      const expected = yield* bus.publish(SessionEvent.Renamed, { sessionID: id, title: "destination" })
+      const done = yield* bus.publish(Done, {})
+      expect(Array.from(yield* Fiber.join(typed))).toEqual([expected])
+      expect(Array.from(yield* Fiber.join(multiple))).toEqual([expected, done])
+    }),
+  )
+
+  it.effect("snapshots routing across creation and moves for slow subscribers", () =>
+    Effect.gen(function* () {
+      const database = yield* Database.Service
+      yield* database.db
+        .insert(ProjectTable)
+        .values({ id: Project.ID.global, worktree: a.directory, sandboxes: [] })
+        .run()
+      const bus = yield* Bus.Service
+      const gate = yield* Deferred.make<void>()
+      const first = yield* watch(bus, a, gate)
+      const second = yield* watch(bus, b, gate)
+      const created = yield* bus.publish(SessionEvent.Created, {
+        sessionID: id,
+        location: a,
+        projectID: Project.ID.global,
+        slug: "routing",
+        version: "test",
+      })
+      const before = yield* bus.publish(SessionEvent.Renamed, { sessionID: id, title: "before" })
+      const moved = yield* bus.publish(SessionEvent.Moved, { sessionID: id, location: b, projectID: Project.ID.global })
+      const after = yield* delta(bus)
+      const done = yield* bus.publish(Done, {})
+      yield* Deferred.succeed(gate, undefined)
+
+      expect(Array.from(yield* Fiber.join(first))).toEqual([created, before, moved, done])
+      expect(Array.from(yield* Fiber.join(second))).toEqual([moved, after, done])
+      expect(moved).not.toHaveProperty("location")
+    }),
+  )
+
+  it.effect("routes a cold Session deletion before its projector removes ownership", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      const first = yield* watch(bus, a)
+      const second = yield* watch(bus, b)
+      const global = yield* watch(bus)
+      const deleted = yield* bus.publish(SessionEvent.Deleted, { sessionID: id })
+      const missing = yield* delta(bus)
+      const done = yield* bus.publish(Done, {})
+
+      const database = yield* Database.Service
+      expect(yield* database.db.select().from(SessionTable).where(eq(SessionTable.id, id)).get()).toBeUndefined()
+      expect(Array.from(yield* Fiber.join(first))).toEqual([deleted, done])
+      expect(Array.from(yield* Fiber.join(second))).toEqual([done])
+      expect(Array.from(yield* Fiber.join(global))).toEqual([deleted, missing, done])
+    }),
+  )
+
+  it.effect("preserves routing through a batch that moves and deletes a Session", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      const gate = yield* Deferred.make<void>()
+      const first = yield* watch(bus, a, gate)
+      const second = yield* watch(bus, b, gate)
+      const events = yield* bus.publishAll([
+        [SessionEvent.Renamed, { sessionID: id, title: "before" }],
+        [SessionEvent.Moved, { sessionID: id, location: b, projectID: Project.ID.global }],
+        [SessionEvent.Renamed, { sessionID: id, title: "after" }],
+        [SessionEvent.Deleted, { sessionID: id }],
+      ])
+      const done = yield* bus.publish(Done, {})
+      yield* Deferred.succeed(gate, undefined)
+      expect(Array.from(yield* Fiber.join(first))).toEqual([events[0], events[1], done])
+      expect(Array.from(yield* Fiber.join(second))).toEqual([events[1], events[2], events[3], done])
+    }),
+  )
+
+  it.effect("does not change ownership when single or batched moves roll back", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      const first = yield* watch(bus, a)
+      const second = yield* watch(bus, b)
+      const before = yield* delta(bus)
+      const single = yield* bus
+        .publish(
+          SessionEvent.Moved,
+          { sessionID: id, location: b, projectID: Project.ID.global },
+          { commit: () => Effect.die("rollback") },
+        )
+        .pipe(Effect.exit)
+      const batch = yield* bus
+        .publishAll([
+          [SessionEvent.Moved, { sessionID: id, location: b, projectID: Project.ID.global }],
+          [SessionEvent.Renamed, { sessionID: id, title: "rollback" }, { commit: () => Effect.die("rollback") }],
+        ])
+        .pipe(Effect.exit)
+      const after = yield* delta(bus)
+      const done = yield* bus.publish(Done, {})
+      expect(Exit.isFailure(single)).toBe(true)
+      expect(Exit.isFailure(batch)).toBe(true)
+      expect(Array.from(yield* Fiber.join(first))).toEqual([before, after, done])
+      expect(Array.from(yield* Fiber.join(second))).toEqual([done])
+    }),
+  )
+
+  it.effect("updates cached ownership on silent replay and filters published replay", () =>
+    Effect.gen(function* () {
+      yield* seed()
+      const bus = yield* Bus.Service
+      yield* delta(bus)
+      const first = yield* watch(bus, a)
+      const second = yield* watch(bus, b)
+      yield* bus.replay({
+        id: Event.ID.create(),
+        type: Bus.versionedType(SessionEvent.Moved.type, 1),
+        seq: 0,
+        aggregateID: id,
+        data: { sessionID: id, location: b, projectID: Project.ID.global },
+      })
+      const after = yield* delta(bus)
+      const replayID = Event.ID.create()
+      yield* bus.replay(
+        {
+          id: replayID,
+          type: Bus.versionedType(SessionEvent.Renamed.type, 1),
+          seq: 1,
+          aggregateID: id,
+          data: { sessionID: id, title: "replayed" },
+        },
+        { publish: true },
+      )
+      const done = yield* bus.publish(Done, {})
+      expect(Array.from(yield* Fiber.join(first))).toEqual([done])
+      const received = Array.from(yield* Fiber.join(second))
+      expect(received.map((event) => event.id)).toEqual([after.id, replayID, done.id])
+      expect(received[1]).not.toHaveProperty("location")
+    }),
+  )
+})

packages/core/test/config/compaction.test.ts

@@ -9,6 +9,7 @@ import { llmClient } from "@opencode-ai/core/effect/app-node-platform"
 import { SessionCompaction } from "@opencode-ai/core/session/compaction"
 import { SessionEvent } from "@opencode-ai/core/session/event"
 import { SessionMessage } from "@opencode-ai/core/session/message"
+import { SessionModelRequest } from "@opencode-ai/core/session/model-request"
 import { SessionRunnerModel } from "@opencode-ai/core/session/runner/model"
 import { Session } from "@opencode-ai/core/session"
 import { Agent } from "@opencode-ai/core/agent"
@@ -38,19 +39,13 @@ const config = Config.testLayer()
 const it = testEffect(
   Layer.merge(
     config,
-    AppNodeBuilder.build(LayerNode.group([SessionCompaction.node, Config.node, Bus.node]), [
+    AppNodeBuilder.build(LayerNode.group([SessionCompaction.node, SessionModelRequest.node, Config.node, Bus.node]), [
       [
         llmClient,
         Layer.mock(LLMClient.Service)({
           stream: () => Stream.make(LLMEvent.textDelta({ id: "summary", text: "summary" })),
         }),
       ],
-      [
-        SessionRunnerModel.node,
-        Layer.mock(SessionRunnerModel.Service)({
-          resolve: () => Effect.succeed(resolved),
-        }),
-      ],
       [Config.node, config],
     ]),
   ),
@@ -59,6 +54,7 @@ describe("ConfigCompactionPlugin.Plugin", () => {
   it.live("merges settings and reloads changed config", () =>
     Effect.gen(function* () {
       const compaction = yield* SessionCompaction.Service
+      const modelRequests = yield* SessionModelRequest.Service
       const config = yield* Config.Test
       const bus = yield* Bus.Service
       yield* config.setEntries([
@@ -85,6 +81,8 @@ describe("ConfigCompactionPlugin.Plugin", () => {
       expect(
         yield* compaction.compactManual({
           session,
+          resolveModel: () => Effect.succeed(resolved),
+          prepare: modelRequests.prepare,
           messages: [
             {
               id: SessionMessage.ID.create(),

packages/core/test/git.test.ts

@@ -131,6 +131,37 @@ describe("Git worktrees", () => {
 })
 
 describe("Git trees", () => {
+  it.live("lists both sides of a rename as separate file changes", () =>
+    Effect.gen(function* () {
+      const root = yield* Effect.acquireRelease(
+        Effect.promise(() => tmpdir()),
+        (dir) => Effect.promise(() => dir[Symbol.asyncDispose]()),
+      )
+      yield* Effect.promise(async () => {
+        await initRepo(root.path)
+        await $`git config diff.renames true`.cwd(root.path).quiet()
+        await Bun.write(path.join(root.path, "old name.txt"), "Preserve this content.\n")
+      })
+      const git = yield* Git.Service
+      const repository = yield* git.repo.discover(AbsolutePath.make(root.path))
+      if (!repository) throw new Error("Repository not found")
+      const before = yield* git.tree.capture({ repository, scopes: [RelativePath.make(".")] })
+      yield* Effect.promise(() => fs.rename(path.join(root.path, "old name.txt"), path.join(root.path, "new name.txt")))
+      const after = yield* git.tree.capture({ repository, scopes: [RelativePath.make(".")] })
+
+      expect(yield* git.tree.files({ repository, from: before, to: after })).toEqual([
+        RelativePath.make("new name.txt"),
+        RelativePath.make("old name.txt"),
+      ])
+      expect(
+        (yield* git.tree.diff({ repository, from: before, to: after })).map((file) => [file.file, file.status]),
+      ).toEqual([
+        ["new name.txt", "added"],
+        ["old name.txt", "deleted"],
+      ])
+    }),
+  )
+
   it.live("captures, compares, previews, and restores scoped trees", () =>
     Effect.gen(function* () {
       const root = yield* Effect.acquireRelease(

packages/core/test/lib/tool.ts

@@ -64,10 +64,8 @@ export const registerToolPlugin = <R>(
         hook: () => Effect.succeed({ dispose: Effect.void }),
       },
       tool: {
-        transform: (callback) =>
-          tools
-            .transform((draft) => callback({ add: (tool) => draft.add(tool) }))
-            .pipe(Effect.orDie, Effect.as({ dispose: Effect.void })),
+        transform: tools.transform,
+        reload: tools.reload,
         hook: () => Effect.die("registerToolPlugin does not support tool hooks"),
       },
     })