fix(ai): keep chat reasoning in one lifecycle

bun.lock

@@ -966,7 +966,6 @@
         "mime-types": "3.0.2",
         "minimatch": "10.2.5",
         "npm-package-arg": "13.0.2",
-        "pacote": "21.5.1",
         "resolve.exports": "catalog:",
       },
       "devDependencies": {
@@ -976,7 +975,6 @@
         "@types/node": "catalog:",
         "@types/npm-package-arg": "6.1.4",
         "@types/npmcli__arborist": "6.3.3",
-        "@types/pacote": "11.1.8",
         "@typescript/native-preview": "catalog:",
       },
     },
@@ -5814,7 +5812,7 @@
 
     "y18n": ["y18n@5.0.8", "", {}, "sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA=="],
 
-    "yallist": ["yallist@5.0.0", "", {}, "sha512-YgvUTfwqyc7UXVMrB+SImsVYSmTS8X/tSrtdNZMImM+n7+QTriRXyXim0mBrTXNeqzVF0KWGgHPeiyViFFrNDw=="],
+    "yallist": ["yallist@4.0.0", "", {}, "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="],
 
     "yaml": ["yaml@2.9.0", "", { "bin": { "yaml": "bin.mjs" } }, "sha512-2AvhNX3mb8zd6Zy7INTtSpl1F15HW6Wnqj0srWlkKLcpYl/gMIMJiyuGq2KeI2YFxUPjdlB+3Lc10seMLtL4cA=="],
 
@@ -6644,6 +6642,8 @@
 
     "svgo/commander": ["commander@11.1.0", "", {}, "sha512-yPVavfyCcRhmorC7rWlkHn15b4wDVgVmBA7kV4QVBsF7kv/9TKJAbAXVTxvTnwP8HHKjRCJDClKbciiYS7p0DQ=="],
 
+    "tar/yallist": ["yallist@5.0.0", "", {}, "sha512-YgvUTfwqyc7UXVMrB+SImsVYSmTS8X/tSrtdNZMImM+n7+QTriRXyXim0mBrTXNeqzVF0KWGgHPeiyViFFrNDw=="],
+
     "temp/rimraf": ["rimraf@2.6.3", "", { "dependencies": { "glob": "^7.1.3" }, "bin": { "rimraf": "./bin.js" } }, "sha512-mwqeW5XsA2qAejG46gYdENaxXjx9onRNCfn7L0duuP4hCuTIi/QO7PDK07KJfp1d+izWPrzEJDcSqBa0OZQriA=="],
 
     "tempy/type-fest": ["type-fest@0.16.0", "", {}, "sha512-eaBzG6MxNzEn9kiwvtre90cXaNLkmadMWa1zQMs3XORCXNbsH/OewwbxC5ia9dCxIxnTAsSxXJaa/p5y8DlvJg=="],
@@ -7450,12 +7450,6 @@
 
     "miniflare/sharp/@img/sharp-win32-x64": ["@img/sharp-win32-x64@0.33.5", "", { "os": "win32", "cpu": "x64" }, "sha512-MpY/o8/8kj+EcnxwvrP4aTJSWw/aZ7JIGR4aBeZkZw5B7/Jn+tY9/VNwtcoGmdT7GfggGIU4kygOMSbYnOrAbg=="],
 
-    "minipass-flush/minipass/yallist": ["yallist@4.0.0", "", {}, "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="],
-
-    "minipass-pipeline/minipass/yallist": ["yallist@4.0.0", "", {}, "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="],
-
-    "openid-client/lru-cache/yallist": ["yallist@4.0.0", "", {}, "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="],
-
     "p-locate/p-limit/yocto-queue": ["yocto-queue@0.1.0", "", {}, "sha512-rVksvsnNCdJ/ohGc6xgPwyN8eheCxsiLM8mxuE/t/mOVqJewPuO1miLpTHQiRgTKCLexL4MeAFVagts7HmNZ2Q=="],
 
     "pkg-dir/find-up/locate-path": ["locate-path@5.0.0", "", { "dependencies": { "p-locate": "^4.1.0" } }, "sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g=="],
@@ -8162,8 +8156,6 @@
 
     "app-builder-lib/@electron/get/fs-extra/universalify": ["universalify@0.1.2", "", {}, "sha512-rBJeI5CXAlmy1pV+617WB9J63U6XcazHHF2f2dbJix4XzpUF0RS3Zbj0FGIOCAva5P/d/GBOYaACQ1w+0azUkg=="],
 
-    "app-builder-lib/hosted-git-info/lru-cache/yallist": ["yallist@4.0.0", "", {}, "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="],
-
     "archiver-utils/glob/jackspeak/@isaacs/cliui": ["@isaacs/cliui@8.0.2", "", { "dependencies": { "string-width": "^5.1.2", "string-width-cjs": "npm:string-width@^4.2.0", "strip-ansi": "^7.0.1", "strip-ansi-cjs": "npm:strip-ansi@^6.0.1", "wrap-ansi": "^8.1.0", "wrap-ansi-cjs": "npm:wrap-ansi@^7.0.0" } }, "sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA=="],
 
     "archiver-utils/glob/minimatch/brace-expansion": ["brace-expansion@2.1.4", "", { "dependencies": { "balanced-match": "^1.0.0" } }, "sha512-hGfVzPxthbf3+2yjg/RBs60cB0FhqBS/zvdV/4wn4/BmN0bNMMHPc4V/BbFieqf1TKAGGAHnY4eSjajCl0f2Xg=="],

nix/hashes.json

@@ -1,8 +1,8 @@
 {
   "nodeModules": {
-    "x86_64-linux": "sha256-Fmwqp/fjTMX7gQW01Zgta51reLHp1S53GSQgBcJePrY=",
-    "aarch64-linux": "sha256-KLI6OIbvycMePKxt66nNKeILYJSEkufOIaSawZ/gotc=",
-    "aarch64-darwin": "sha256-go1wmrsHfYfJ3ukUIR/fveobyVba4E9G/rdsB/J2cQQ=",
-    "x86_64-darwin": "sha256-UnVYMijlG12k4RLFkTwf4Or0yXqFSwe1Ji6QCGufjzg="
+    "x86_64-linux": "sha256-EtUp4pHl9TyPtRrLGvk/X7kd2LuIxNxCpUwF5aLtzN4=",
+    "aarch64-linux": "sha256-m0j/pMZCguclR3/T9JmzCfi11YzmIvBFyR2bVhIO37Y=",
+    "aarch64-darwin": "sha256-nqefk68ZTUfNU15q1WkXaGsFzPNwOjCtMHpp6WrpNqM=",
+    "x86_64-darwin": "sha256-syD7hX62E4yCDV/wux1QKw4q/zZr24f99Y2mmzMJo6o="
   }
 }

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

@@ -496,6 +496,7 @@ const mapUsage = (usage: BedrockUsageSchema | undefined, providerMetadataKey: st
 interface ParserState {
   readonly providerMetadataKey: string
   readonly tools: ToolStream.State<number>
+  readonly finishedTools: ReadonlySet<number>
   // Bedrock splits the finish into `messageStop` (carries `stopReason`) and
   // `metadata` (carries usage). Hold the terminal event in state so `onHalt`
   // can emit exactly one finish after both chunks have had a chance to arrive.
@@ -574,6 +575,7 @@ const step = (state: ParserState, event: BedrockEvent) =>
 
     if (event.contentBlockDelta?.delta?.toolUse) {
       const index = event.contentBlockDelta.contentBlockIndex
+      if (state.finishedTools.has(index)) return [state, []] as const
       const result = ToolStream.appendExisting(
         ADAPTER,
         state.tools,
@@ -612,6 +614,7 @@ const step = (state: ParserState, event: BedrockEvent) =>
             state.hasToolCalls,
           lifecycle,
           tools: result.tools,
+          finishedTools: resultEvents.length > 0 ? new Set([...state.finishedTools, index]) : state.finishedTools,
           reasoningSignatures: Object.fromEntries(
             Object.entries(state.reasoningSignatures).filter(([key]) => key !== String(index)),
           ),
@@ -703,6 +706,7 @@ export const protocol = Protocol.make({
     initial: (request) => ({
       providerMetadataKey: request.model.route.providerMetadataKey ?? String(request.model.provider),
       tools: ToolStream.empty<number>(),
+      finishedTools: new Set<number>(),
       pendingFinish: undefined,
       hasToolCalls: false,
       lifecycle: Lifecycle.initial(),

packages/ai/src/protocols/open-responses.ts

@@ -391,17 +391,19 @@ export interface ParserState {
   readonly name: string
   readonly providerMetadataKey: string
   readonly tools: ToolStream.State<string>
+  // Call ids stay independent of item ids, which may be omitted or reused.
+  readonly completedTools: ReadonlySet<string>
   readonly hasFunctionCall: boolean
   readonly lifecycle: Lifecycle.State
   readonly outputItems: Readonly<Record<number, string>>
-  readonly messageItems: ReadonlySet<string>
-  readonly messagePhases: Readonly<Record<string, MessagePhase | null>>
+  readonly message: { readonly id: string; readonly phase: MessagePhase | null | undefined } | undefined
   readonly reasoningItems: Readonly<Record<string, ReasoningStreamItem>>
 }
 
 type ReasoningSummaryStatus = "active" | "can-conclude" | "concluded"
 
 interface ReasoningStreamItem {
+  readonly open: boolean
   readonly encryptedContent: string | null | undefined
   // Keyed by the wire protocol's numeric `summary_index`. JS object keys coerce to
   // strings, but typing the map as `Record<number, ...>` documents intent
@@ -826,16 +828,16 @@ const TERMINAL_TYPES = new Set(["error", "response.completed", "response.incompl
 export const terminal = (event: Event) => TERMINAL_TYPES.has(event.type)
 
 const onOutputTextDelta = (state: ParserState, event: Event, id: string): StepResult => {
-  if (!event.delta || !state.messageItems.has(id)) return [state, NO_EVENTS]
+  if (!event.delta || state.message?.id !== id) return [state, NO_EVENTS]
   const events: LLMEvent[] = []
-  const phase = state.messagePhases[id]
+  const phase = state.message.phase
   const metadata = providerMetadata(state, { itemId: id, ...(phase === undefined ? {} : { phase }) })
   const lifecycle = Lifecycle.textStart(state.lifecycle, events, id, metadata)
   return [{ ...state, lifecycle: Lifecycle.textDelta(lifecycle, events, id, event.delta) }, events]
 }
 
 const onOutputTextDone = (state: ParserState, event: Event, id: string): StepResult => {
-  if (state.messageItems.has(id)) {
+  if (state.message?.id === id) {
     if (state.lifecycle.text.has(id) || event.text === undefined) return [state, NO_EVENTS]
     return onOutputTextDelta(state, { ...event, delta: event.text }, id)
   }
@@ -846,18 +848,62 @@ const onOutputTextDone = (state: ParserState, event: Event, id: string): StepRes
 export const outputItemID = (state: ParserState, event: Event) =>
   event.output_index === undefined ? event.item_id : (state.outputItems[event.output_index] ?? event.item_id)
 
-export const onReasoningDelta = (state: ParserState, event: Event, itemID: string): StepResult => {
+const startReasoningSummaryPart = (state: ParserState, itemID: string, index: number): StepResult => {
   const item = state.reasoningItems[itemID]
-  if (!event.delta || !item) return [state, NO_EVENTS]
-  const index = event.summary_index ?? 0
+  if (!item?.open || index === 0 || item.summaryParts[index] !== undefined) return [state, NO_EVENTS]
+
   const events: LLMEvent[] = []
+  const lifecycle = Object.entries(item.summaryParts)
+    .filter((entry) => entry[1] !== "concluded")
+    .reduce(
+      (lifecycle, entry) =>
+        Lifecycle.reasoningEnd(lifecycle, events, `${itemID}:${entry[0]}`, providerMetadata(state, { itemId: itemID })),
+      state.lifecycle,
+    )
   return [
     {
       ...state,
-      lifecycle: Lifecycle.reasoningDelta(state.lifecycle, events, `${itemID}:${index}`, event.delta),
+      lifecycle: Lifecycle.reasoningStart(
+        lifecycle,
+        events,
+        `${itemID}:${index}`,
+        providerMetadata(state, { itemId: itemID, reasoningEncryptedContent: item.encryptedContent ?? null }),
+      ),
       reasoningItems: {
         ...state.reasoningItems,
-        [itemID]: { ...item, deltaIndexes: new Set([...item.deltaIndexes, index]) },
+        [itemID]: {
+          ...item,
+          summaryParts: {
+            ...Object.fromEntries(
+              Object.entries(item.summaryParts).map((entry) =>
+                entry[1] === "concluded" ? entry : [entry[0], "concluded" as const],
+              ),
+            ),
+            [index]: "active",
+          },
+        },
+      },
+    },
+    events,
+  ]
+}
+
+export const onReasoningDelta = (state: ParserState, event: Event, itemID: string): StepResult => {
+  const item = state.reasoningItems[itemID]
+  if (!event.delta || !item?.open) return [state, NO_EVENTS]
+  const index = event.summary_index ?? 0
+  if (item.summaryParts[index] === "concluded") return [state, NO_EVENTS]
+  const [started, emitted] = startReasoningSummaryPart(state, itemID, index)
+  const current = started.reasoningItems[itemID]
+  if (!current) return [started, emitted]
+  const events: LLMEvent[] = [...emitted]
+  return [
+    {
+      ...started,
+      lifecycle: Lifecycle.reasoningDelta(started.lifecycle, events, `${itemID}:${index}`, event.delta),
+      reasoningItems: {
+        ...started.reasoningItems,
+        [itemID]: { ...current, deltaIndexes: new Set([...current.deltaIndexes, index]) },
       },
     },
     events,
@@ -869,7 +915,7 @@ export const onReasoningDelta = (state: ParserState, event: Event, itemID: strin
 // as a single delta unless that summary index already streamed one.
 export const onReasoningDone = (state: ParserState, event: Event, itemID: string): StepResult => {
   const item = state.reasoningItems[itemID]
-  if (!item || typeof event.text !== "string") return [state, NO_EVENTS]
+  if (!item?.open || typeof event.text !== "string") return [state, NO_EVENTS]
   const index = event.summary_index ?? 0
   if (item.deltaIndexes.has(index)) return [state, NO_EVENTS]
   return onReasoningDelta(state, { ...event, delta: event.text }, itemID)
@@ -878,32 +924,48 @@ export const onReasoningDone = (state: ParserState, event: Event, itemID: string
 const reasoningMetadata = (state: ParserState, item: StreamItem & { id: string }) =>
   providerMetadata(state, { itemId: item.id, reasoningEncryptedContent: item.encrypted_content ?? null })
 
-// Responses APIs stream reasoning items in a stable order:
+// Responses APIs normally stream reasoning items in this order:
 //   `output_item.added` (reasoning) →
 //     `reasoning_summary_part.added` (index=0) →
 //     `reasoning_summary_text.delta` →
 //     `reasoning_summary_part.done` (index=0) →
 //     (repeat for index>0) →
 //   `output_item.done` (reasoning).
-// The handlers below rely on this ordering: `onOutputItemAdded` seeds the
-// per-item entry, `onReasoningSummaryPartAdded` for `summary_index === 0`
-// short-circuits when the entry already exists, and higher-index handlers
-// fold against the same entry. Behaviour for out-of-order events is
-// best-effort, not guaranteed.
+// `onOutputItemAdded` seeds the per-item entry, while each later part start is
+// also an implicit boundary for the previous part. This keeps the common event
+// lifecycle ordered when a compatible provider omits or delays a part-done event.
 const onOutputItemAdded = (state: ParserState, event: Event): StepResult => {
   const item = event.item
   if (item?.type === "message" && item.id !== undefined) {
+    const itemID = item.id
     const phase = messagePhase(item.phase)
+    // A new message closes earlier messages, including ones that never streamed.
+    const events: LLMEvent[] = []
+    const lifecycle = [...state.lifecycle.text]
+      .filter((id) => id !== itemID)
+      .reduce((lifecycle, id) => {
+        const openPhase = state.message?.id === id ? state.message.phase : undefined
+        return Lifecycle.textEnd(
+          lifecycle,
+          events,
+          id,
+          providerMetadata(state, { itemId: id, ...(openPhase === undefined ? {} : { phase: openPhase }) }),
+        )
+      }, state.lifecycle)
     return [
       {
         ...state,
-        messageItems: new Set([...state.messageItems, item.id]),
-        messagePhases: phase === undefined ? state.messagePhases : { ...state.messagePhases, [item.id]: phase },
+        lifecycle,
+        message: {
+          id: itemID,
+          phase: phase === undefined && state.message?.id === itemID ? state.message.phase : phase,
+        },
       },
-      NO_EVENTS,
+      events,
     ]
   }
   if (item && isReasoningItem(item)) {
+    if (state.reasoningItems[item.id] !== undefined) return [state, NO_EVENTS]
     const events: LLMEvent[] = []
     return [
       {
@@ -912,6 +974,7 @@ const onOutputItemAdded = (state: ParserState, event: Event): StepResult => {
         reasoningItems: {
           ...state.reasoningItems,
           [item.id]: {
+            open: true,
             encryptedContent: item.encrypted_content,
             summaryParts: { 0: "active" },
             deltaIndexes: new Set(),
@@ -923,6 +986,8 @@ const onOutputItemAdded = (state: ParserState, event: Event): StepResult => {
   }
   if (item?.type !== "function_call" || !item.call_id) return [state, NO_EVENTS]
   const id = item.id ?? item.call_id
+  if (Object.values(state.tools).some((tool) => tool?.id === item.call_id) || state.completedTools.has(item.call_id))
+    return [state, NO_EVENTS]
   const metadata = item.id !== undefined ? providerMetadata(state, { itemId: item.id }) : undefined
   const events: LLMEvent[] = []
   const lifecycle = Lifecycle.stepStart(state.lifecycle, events)
@@ -943,55 +1008,14 @@ const onOutputItemAdded = (state: ParserState, event: Event): StepResult => {
 
 const onReasoningSummaryPartAdded = (state: ParserState, event: Event): StepResult => {
   if (event.item_id === undefined || event.summary_index === undefined) return [state, NO_EVENTS]
-  const item = state.reasoningItems[event.item_id]
-  if (!item) return [state, NO_EVENTS]
-  if (event.summary_index === 0) return [state, NO_EVENTS]
-
-  const events: LLMEvent[] = []
-  const closed = Object.entries(item.summaryParts)
-    .filter((entry) => entry[1] === "can-conclude")
-    .reduce(
-      (lifecycle, entry) =>
-        Lifecycle.reasoningEnd(
-          lifecycle,
-          events,
-          `${event.item_id}:${entry[0]}`,
-          providerMetadata(state, { itemId: event.item_id }),
-        ),
-      state.lifecycle,
-    )
-  return [
-    {
-      ...state,
-      lifecycle: Lifecycle.reasoningStart(
-        closed,
-        events,
-        `${event.item_id}:${event.summary_index}`,
-        providerMetadata(state, { itemId: event.item_id, reasoningEncryptedContent: item.encryptedContent ?? null }),
-      ),
-      reasoningItems: {
-        ...state.reasoningItems,
-        [event.item_id]: {
-          ...item,
-          summaryParts: {
-            ...Object.fromEntries(
-              Object.entries(item.summaryParts).map((entry) =>
-                entry[1] === "can-conclude" ? [entry[0], "concluded" as const] : entry,
-              ),
-            ),
-            [event.summary_index]: "active",
-          },
-        },
-      },
-    },
-    events,
-  ]
+  return startReasoningSummaryPart(state, event.item_id, event.summary_index)
 }
 
 const onReasoningSummaryPartDone = (state: ParserState, event: Event): StepResult => {
   if (event.item_id === undefined || event.summary_index === undefined) return [state, NO_EVENTS]
   const item = state.reasoningItems[event.item_id]
-  if (!item) return [state, NO_EVENTS]
+  if (!item?.open) return [state, NO_EVENTS]
+  if (item.summaryParts[event.summary_index] !== "active") return [state, NO_EVENTS]
   return [
     {
       ...state,
@@ -1047,11 +1071,8 @@ const onOutputItemDone = Effect.fn("OpenResponses.onOutputItemDone")(function* (
 
   if (item.type === "message" && item.id !== undefined) {
     const itemPhase = messagePhase(item.phase)
-    const phase = itemPhase === undefined ? state.messagePhases[item.id] : itemPhase
+    const phase = itemPhase === undefined && state.message?.id === item.id ? state.message.phase : itemPhase
     const events: LLMEvent[] = []
-    const messageItems = new Set(state.messageItems)
-    messageItems.delete(item.id)
-    const { [item.id]: _phase, ...messagePhases } = state.messagePhases
     return [
       {
         ...state,
@@ -1061,8 +1082,7 @@ const onOutputItemDone = Effect.fn("OpenResponses.onOutputItemDone")(function* (
           item.id,
           providerMetadata(state, { itemId: item.id, ...(phase === undefined ? {} : { phase }) }),
         ),
-        messageItems,
-        messagePhases,
+        message: state.message?.id === item.id ? undefined : state.message,
       },
       events,
     ] satisfies StepResult
@@ -1070,20 +1090,36 @@ const onOutputItemDone = Effect.fn("OpenResponses.onOutputItemDone")(function* (
 
   if (item.type === "function_call") {
     if (!item.call_id || !item.name) return [state, NO_EVENTS] satisfies StepResult
-    const id = item.id ?? item.call_id
-    const tools = state.tools[id]
-      ? state.tools
-      : ToolStream.start(state.tools, id, {
-          id: item.call_id,
-          name: item.name,
-          providerMetadata: item.id !== undefined ? providerMetadata(state, { itemId: item.id }) : undefined,
-        })
+    const callID = item.call_id
+    if (state.completedTools.has(callID)) return [state, NO_EVENTS] satisfies StepResult
+    const metadata = item.id !== undefined ? providerMetadata(state, { itemId: item.id }) : undefined
+    const fallback = item.id ?? callID
+    // Match the pending tool by call id so item events that disagree on
+    // whether `item.id` is present still resolve the same call.
+    const registered =
+      state.tools[fallback] !== undefined
+        ? fallback
+        : Object.keys(state.tools).find((key) => state.tools[key]?.id === callID)
+    const id = registered ?? fallback
+    const tools =
+      registered !== undefined
+        ? state.tools
+        : ToolStream.start(state.tools, id, {
+            id: callID,
+            name: item.name,
+            providerMetadata: metadata,
+          })
     const result =
       item.arguments === undefined
         ? yield* ToolStream.finish(state.id, tools, id)
         : yield* ToolStream.finishWithInput(state.id, tools, id, item.arguments)
     const events: LLMEvent[] = []
-    const resultEvents = result.events ?? []
+    const finished = result.events ?? []
+    // A done-only call never streamed a start event, so open its lifecycle here.
+    const resultEvents =
+      registered !== undefined || finished.length === 0
+        ? finished
+        : [LLMEvent.toolInputStart({ id: callID, name: item.name, providerMetadata: metadata }), ...finished]
     const lifecycle = resultEvents.length ? Lifecycle.stepStart(state.lifecycle, events) : state.lifecycle
     events.push(...resultEvents)
     return [
@@ -1094,6 +1130,7 @@ const onOutputItemDone = Effect.fn("OpenResponses.onOutputItemDone")(function* (
           resultEvents.some((event) => LLMEvent.is.toolCall(event) || LLMEvent.is.toolInputError(event)) ||
           state.hasFunctionCall,
         tools: result.tools,
+        completedTools: new Set([...state.completedTools, callID]),
       },
       events,
     ] satisfies StepResult
@@ -1104,20 +1141,49 @@ const onOutputItemDone = Effect.fn("OpenResponses.onOutputItemDone")(function* (
     const metadata = reasoningMetadata(state, item)
     const reasoningItem = state.reasoningItems[item.id]
     if (reasoningItem) {
+      if (!reasoningItem.open) return [state, NO_EVENTS] satisfies StepResult
       const lifecycle = Object.entries(reasoningItem.summaryParts)
         .filter((entry) => entry[1] === "active" || entry[1] === "can-conclude")
         .reduce(
           (lifecycle, entry) => Lifecycle.reasoningEnd(lifecycle, events, `${item.id}:${entry[0]}`, metadata),
           state.lifecycle,
         )
-      const { [item.id]: _removed, ...reasoningItems } = state.reasoningItems
-      return [{ ...state, lifecycle, reasoningItems }, events] satisfies StepResult
+      return [
+        {
+          ...state,
+          lifecycle,
+          reasoningItems: {
+            ...state.reasoningItems,
+            [item.id]: {
+              ...reasoningItem,
+              open: false,
+              encryptedContent: item.encrypted_content ?? reasoningItem.encryptedContent,
+            },
+          },
+        },
+        events,
+      ] satisfies StepResult
     }
     if (!state.lifecycle.reasoning.has(item.id)) {
       const lifecycle = Lifecycle.stepStart(state.lifecycle, events)
       events.push(LLMEvent.reasoningStart({ id: item.id, providerMetadata: metadata }))
       events.push(LLMEvent.reasoningEnd({ id: item.id, providerMetadata: metadata }))
-      return [{ ...state, lifecycle }, events] satisfies StepResult
+      return [
+        {
+          ...state,
+          lifecycle,
+          reasoningItems: {
+            ...state.reasoningItems,
+            [item.id]: {
+              open: false,
+              encryptedContent: item.encrypted_content,
+              summaryParts: { 0: "concluded" },
+              deltaIndexes: new Set(),
+            },
+          },
+        },
+        events,
+      ] satisfies StepResult
     }
     return [
       { ...state, lifecycle: Lifecycle.reasoningEnd(state.lifecycle, events, item.id, metadata) },
@@ -1139,7 +1205,7 @@ const onResponseFinish = Effect.fn("OpenResponses.onResponseFinish")(function* (
             if (
               id === undefined ||
               ((item.type !== "function_call" || !current.tools[id]) &&
-                (item.type !== "reasoning" || !current.reasoningItems[id]))
+                (item.type !== "reasoning" || !current.reasoningItems[id]?.open))
             )
               return Effect.succeed([current, events] satisfies StepResult)
             return onOutputItemDone(current, { type: "response.output_item.done", item }).pipe(
@@ -1256,6 +1322,13 @@ export const step = (state: ParserState, input: Event) => {
   if (event.type === "response.output_item.added") {
     if (event.item?.type === "message" && event.item.id === undefined)
       return ProviderShared.eventError(state.id, `${event.type} message is missing id`)
+    if (
+      event.item &&
+      isReasoningItem(event.item) &&
+      state.reasoningItems[event.item.id] === undefined &&
+      state.lifecycle.reasoning.size > 0
+    )
+      return ProviderShared.eventError(state.id, `${event.type} started reasoning before the previous item ended`)
     const id = event.item?.id ?? (event.item?.type === "function_call" ? event.item.call_id : undefined)
     return Effect.succeed(
       onOutputItemAdded(
@@ -1305,10 +1378,10 @@ export const initial = (request: LLMRequest, extension: Extension = BASE): Parse
   providerMetadataKey: request.model.route.providerMetadataKey ?? "openresponses",
   hasFunctionCall: false,
   tools: ToolStream.empty<string>(),
+  completedTools: new Set<string>(),
   lifecycle: Lifecycle.initial(),
   outputItems: {},
-  messageItems: new Set<string>(),
-  messagePhases: {},
+  message: undefined,
   reasoningItems: {},
 })
 

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

@@ -3,6 +3,7 @@ import { Tool } from "@opencode-ai/schema/tool"
 import { Route } from "../route/client.js"
 import { Auth } from "../route/auth.js"
 import { Endpoint } from "../route/endpoint.js"
+import { Framing } from "../route/framing.js"
 import { HttpTransport } from "../route/transport/index.js"
 import { Protocol } from "../route/protocol.js"
 import {
@@ -245,6 +246,8 @@ export const OpenAIChatEvent = Schema.StructWithRest(
   [Schema.Record(Schema.String, Schema.Unknown)],
 )
 export type OpenAIChatEvent = Schema.Schema.Type<typeof OpenAIChatEvent>
+const DONE = "[DONE]" as const
+const OpenAIChatStreamEvent = Schema.Union([Schema.Literal(DONE), Protocol.jsonEvent(OpenAIChatEvent)])
 type OpenAIChatRequestMessage = LLMRequest["messages"][number]
 
 interface PendingToolDelta {
@@ -997,33 +1000,12 @@ const step = (state: ParserState, event: OpenAIChatEvent) =>
       lifecycle = Lifecycle.reasoningStart(lifecycle, events, "reasoning-0", deltaMetadata)
     const reasoningEmitted = state.reasoningEmitted || lifecycle.reasoning.has("reasoning-0")
 
-    if (delta?.content) {
-      lifecycle = Lifecycle.reasoningEnd(
-        lifecycle,
-        events,
-        "reasoning-0",
-        reasoningMetadata(
-          state.providerMetadataKey,
-          reasoningField,
-          reasoningDetailsObserved ? state.reasoningDetails : undefined,
-        ),
-      )
-      lifecycle = Lifecycle.textDelta(lifecycle, events, "text-0", delta.content)
-    }
+    // Reasoning is one response-wide channel: it stays open alongside text and
+    // refusal output so late reasoning deltas and details join the same block,
+    // and `finishEvents` closes it once with the complete metadata.
+    if (delta?.content) lifecycle = Lifecycle.textDelta(lifecycle, events, "text-0", delta.content)
 
-    if (delta?.refusal) {
-      lifecycle = Lifecycle.reasoningEnd(
-        lifecycle,
-        events,
-        "reasoning-0",
-        reasoningMetadata(
-          state.providerMetadataKey,
-          reasoningField,
-          reasoningDetailsObserved ? state.reasoningDetails : undefined,
-        ),
-      )
-      lifecycle = Lifecycle.textDelta(lifecycle, events, "text-0", delta.refusal)
-    }
+    if (delta?.refusal) lifecycle = Lifecycle.textDelta(lifecycle, events, "text-0", delta.refusal)
 
     // Compatible providers may omit indexes. Prefer durable identity, then use
     // batch position for parallel deltas or the latest call for sparse chunks.
@@ -1129,10 +1111,12 @@ const finishEvents = Effect.fn("OpenAIChat.finishEvents")(function* (state: Pars
           state.finishReason.normalized === "stop" && hasToolCalls ? "tool-calls" : state.finishReason.normalized,
       }
     : { normalized: hasToolCalls ? ("tool-calls" as const) : ("stop" as const) }
+  // Snapshot details at publish time so the emitted event never observes later
+  // mutation of the accumulated `reasoningDetails` array.
   const metadata = reasoningMetadata(
     state.providerMetadataKey,
     state.reasoningField,
-    state.reasoningDetailsObserved ? state.reasoningDetails : undefined,
+    state.reasoningDetailsObserved ? [...state.reasoningDetails] : undefined,
   )
   const started =
     state.reasoningDetailsObserved && !state.reasoningEmitted
@@ -1166,7 +1150,7 @@ export const protocol = Protocol.make({
     from: fromRequest,
   },
   stream: {
-    event: Protocol.jsonEvent(OpenAIChatEvent),
+    event: OpenAIChatStreamEvent,
     initial: (request) => ({
       providerMetadataKey: request.model.route.providerMetadataKey ?? String(request.model.provider),
       tools: ToolStream.empty<number>(),
@@ -1180,12 +1164,14 @@ export const protocol = Protocol.make({
       nextToolIndex: 0,
       requireFinishReason: request.model.compatibility?.requireFinishReason ?? true,
     }),
-    step,
+    step: (state: ParserState, event) => (event === DONE ? Effect.succeed([state, []] as const) : step(state, event)),
+    terminal: (event) => event === DONE,
     onHalt: finishEvents,
   },
 })
 
-export const httpTransport = HttpTransport.sseJson.with<OpenAIChatBody>()
+export const framing = Framing.sseWithDone
+export const httpTransport = HttpTransport.sseJson.with<OpenAIChatBody>().with({ framing })
 
 export const route = Route.make({
   id: ADAPTER,

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

@@ -1,6 +1,5 @@
 import { Route, type RouteRoutedLanguageModelInput } from "../route/client.js"
 import { Endpoint } from "../route/endpoint.js"
-import { Framing } from "../route/framing.js"
 import * as OpenAIChat from "./openai-chat.js"
 
 const ADAPTER = "openai-compatible-chat"
@@ -19,7 +18,7 @@ export const route = Route.make({
   providerMetadataKey: "openai",
   protocol: OpenAIChat.protocol,
   endpoint: Endpoint.path("/chat/completions"),
-  framing: Framing.sse,
+  framing: OpenAIChat.framing,
 })
 
 export * as OpenAICompatibleChat from "./openai-compatible-chat.js"

packages/ai/src/protocols/shared.ts

@@ -207,15 +207,16 @@ export const errorText = (error: unknown) => {
 
 /**
  * `framing` step for Server-Sent Events. Decodes UTF-8, runs the SSE channel
- * decoder, optionally filters named events, and drops empty / `[DONE]`
- * keep-alive events so the protocol event schema sees one JSON string per
- * element. Retry control events are ignored without interrupting the stream.
+ * decoder, optionally filters named events, and drops empty events. `[DONE]`
+ * is dropped by default or retained for protocols that use it as their stream
+ * boundary. Retry control events are ignored without interrupting the stream.
  * Decoder failures become provider output errors so the public error channel
  * stays `AIError`.
  */
 export const sseFraming = (
   bytes: Stream.Stream<Uint8Array, AIError>,
   events?: ReadonlySet<string>,
+  includeDone = false,
 ): Stream.Stream<string, AIError> =>
   bytes.pipe(
     Stream.decodeText(),
@@ -240,7 +241,7 @@ export const sseFraming = (
       (event) =>
         (events === undefined || events.has(event.event)) &&
         event.data.length > 0 &&
-        (event.data !== "[DONE]" || (events !== undefined && event.event !== "message")),
+        (event.data !== "[DONE]" || includeDone || (events !== undefined && event.event !== "message")),
     ),
     Stream.map((event) => event.data),
   )

packages/ai/src/protocols/utils/lifecycle.ts

@@ -62,22 +62,31 @@ export const reasoningEnd = (
   events: LLMEvent[],
   id: string,
   providerMetadata?: ProviderMetadata,
+  /** Authoritative complete value; replaces accumulated deltas when present. */
+  text?: string,
 ): State => {
   if (!state.reasoning.has(id)) return state
   const stepped = stepStart(state, events)
-  events.push(LLMEvent.reasoningEnd({ id, providerMetadata }))
+  events.push(LLMEvent.reasoningEnd({ id, text, providerMetadata }))
   const reasoning = new Set(stepped.reasoning)
   reasoning.delete(id)
   return { ...stepped, reasoning }
 }
 
-export const textEnd = (state: State, events: LLMEvent[], id: string, providerMetadata?: ProviderMetadata): State => {
+export const textEnd = (
+  state: State,
+  events: LLMEvent[],
+  id: string,
+  providerMetadata?: ProviderMetadata,
+  /** Authoritative complete value; replaces accumulated deltas when present. */
+  text?: string,
+): State => {
   if (!state.text.has(id)) return state
   const stepped = stepStart(state, events)
-  events.push(LLMEvent.textEnd({ id, providerMetadata }))
-  const text = new Set(stepped.text)
-  text.delete(id)
-  return { ...stepped, text }
+  events.push(LLMEvent.textEnd({ id, text, providerMetadata }))
+  const open = new Set(stepped.text)
+  open.delete(id)
+  return { ...stepped, text: open }
 }
 
 const closeOpenBlocks = (state: State, events: LLMEvent[]): State => {

packages/ai/src/provider-error.ts

@@ -37,6 +37,7 @@ const patterns = [
   /too large for model with \d+ maximum context length/i,
   /prompt has [\d,]+ tokens?, but the configured context size is [\d,]+ tokens?/i,
   /model_context_window_exceeded/i,
+  /range of input length should be/i,
   /too many tokens/i,
   /token limit exceeded/i,
   /request_too_large/i,
@@ -59,6 +60,7 @@ export const isContextOverflowFailure = (failure: unknown) =>
 
 const decodeJson = Schema.decodeUnknownOption(Schema.fromJsonString(Schema.Unknown))
 const QUOTA_CODES = new Set(["insufficient_quota", "usage_not_included", "billing_error"])
+const AUTH_CODES = new Set(["authentication_error", "permission_error"])
 const SERVER_CODES = new Set([
   "api_error",
   "internal_error",
@@ -74,7 +76,6 @@ const INVALID_REQUEST_CODES = new Set(["invalid_prompt", "invalid_request_error"
 const RATE_LIMIT_TEXT = /rate increased too quickly|rate[-_\s]?limit|too[_\s]?many[_\s]?requests/i
 const QUOTA_TEXT = /insufficient[-_\s]?quota|quota[-_\s]?exceeded/i
 const CONTENT_POLICY_TEXT = /content[-_\s]?policy|content_filter|safety/i
-const NETWORK_ERROR_TEXT = /network[-_\s]error/i
 
 export interface ProviderFailure {
   readonly message: string
@@ -90,8 +91,12 @@ export interface ProviderFailure {
   readonly rateLimit?: HttpRateLimitDetails | undefined
 }
 
-// Keep HTTP failures and provider-reported stream failures on one typed path so
-// session retry policy never needs provider-specific string matching.
+// Classification records affirmative evidence about a failure. Deterministic
+// failures need positive identification (a 4xx status, quota/auth/policy
+// signals); anything unrecognized stays UnknownProvider, which the session
+// retry policy treats as retry-eligible because transient failures arrive in
+// unpredictable shapes while deterministic rejections almost always carry a
+// status or known code.
 export function classifyProviderFailure(input: ProviderFailure): AIError["reason"] {
   const details = { message: input.message, body: input.rawBody, http: input.http, cause: input.cause }
   const body = input.rawBody ?? ""
@@ -116,46 +121,33 @@ export function classifyProviderFailure(input: ProviderFailure): AIError["reason
   if (CONTENT_POLICY_TEXT.test(text)) return new ContentPolicyError(details)
   if (codes.some((code) => QUOTA_CODES.has(code)) || (input.status === 429 && QUOTA_TEXT.test(text)))
     return new QuotaExceededError(details)
-  if (input.status === 401) return new AuthenticationError({ ...details, kind: "invalid" })
-  if (input.status === 403) return new AuthenticationError({ ...details, kind: "insufficient-permissions" })
-  if (codes.includes("authentication_error")) return new AuthenticationError({ ...details, kind: "invalid" })
-  if (codes.includes("permission_error"))
-    return new AuthenticationError({ ...details, kind: "insufficient-permissions" })
+  if (input.status === 401 || input.status === 403 || codes.some((code) => AUTH_CODES.has(code)))
+    return new AuthenticationError(details)
   if (
-    codes.some((code) => code.includes("rate_limit") || code === "too_many_requests" || code === "throttlingexception")
+    input.status === 429 ||
+    codes.some(
+      (code) => code.includes("rate_limit") || code === "too_many_requests" || code === "throttlingexception",
+    ) ||
+    RATE_LIMIT_TEXT.test(text)
   )
     return new RateLimitError({
       ...details,
       retryAfterMs: input.retryAfterMs,
       rateLimit: input.rateLimit,
     })
-  if (RATE_LIMIT_TEXT.test(text))
-    return new RateLimitError({
-      ...details,
-      retryAfterMs: input.retryAfterMs,
-      rateLimit: input.rateLimit,
-    })
-  if (NETWORK_ERROR_TEXT.test(text)) return new ProviderInternalError(details)
-  if (codes.some((code) => SERVER_CODES.has(code) || code.includes("exhausted") || code.includes("unavailable")))
-    return new ProviderInternalError({
-      ...details,
-      retryAfterMs: input.retryAfterMs,
-    })
-  if (input.status === 429) {
-    return new RateLimitError({
-      ...details,
-      retryAfterMs: input.retryAfterMs,
-      rateLimit: input.rateLimit,
-    })
-  }
-  if (input.status === 408 || input.status === 409 || (input.status !== undefined && input.status >= 500))
+  if (
+    input.status === 408 ||
+    input.status === 409 ||
+    (input.status !== undefined && input.status >= 500) ||
+    codes.some((code) => SERVER_CODES.has(code) || code.includes("exhausted") || code.includes("unavailable"))
+  )
     return new ProviderInternalError({
       ...details,
       retryAfterMs: input.retryAfterMs,
     })
   if (codes.some((code) => INVALID_REQUEST_CODES.has(code))) return new InvalidRequestError(details)
-  if (input.status === 400 || input.status === 404 || input.status === 413 || input.status === 422)
-    return new InvalidRequestError(details)
+  // Any remaining 4xx is a deterministic rejection of this request.
+  if (input.status !== undefined && input.status >= 400 && input.status < 500) return new InvalidRequestError(details)
   return new UnknownProviderError(details)
 }
 

packages/ai/src/providers/groq.ts

@@ -5,7 +5,6 @@ import { ProviderShared } from "../protocols/shared.js"
 import { AuthOptions, type ProviderAuthOption } from "../route/auth-options.js"
 import { Route, type RouteDefaultsInput } from "../route/client.js"
 import { Endpoint } from "../route/endpoint.js"
-import { Framing } from "../route/framing.js"
 import { Protocol } from "../route/protocol.js"
 import { ProviderID, type ModelID, type LLMRequest } from "../schema/index.js"
 import { profiles } from "./openai-compatible-profile.js"
@@ -75,7 +74,7 @@ export const route = Route.make({
   providerMetadataKey: "openai",
   protocol,
   endpoint: Endpoint.path("/chat/completions", { baseURL: profiles.groq.baseURL }),
-  framing: Framing.sse,
+  framing: OpenAIChat.framing,
 })
 
 export const configure = (input: LanguageModelOptions = {}) => {

packages/ai/src/providers/openrouter.ts

@@ -1,7 +1,6 @@
 import { Effect, Schema } from "effect"
 import { Route, type RouteDefaultsInput } from "../route/client.js"
 import { Endpoint } from "../route/endpoint.js"
-import { Framing } from "../route/framing.js"
 import { Protocol } from "../route/protocol.js"
 import { AuthOptions, type ProviderAuthOption } from "../route/auth-options.js"
 import { ProviderID, type CacheHint, type ModelID } from "../schema/index.js"
@@ -167,7 +166,7 @@ export const route = Route.make({
   providerMetadataKey: "openrouter",
   protocol,
   endpoint: Endpoint.path("/chat/completions", { baseURL: profile.baseURL }),
-  framing: Framing.sse,
+  framing: OpenAIChat.framing,
 })
 
 export const routes = [route]

packages/ai/src/route/auth.ts

@@ -139,7 +139,7 @@ const toAIError = (error: AuthError): AIError => {
     return new AIError({
       reason:
         error instanceof MissingCredentialError
-          ? new AuthenticationError({ message: error.message, cause: error, kind: "missing" })
+          ? new AuthenticationError({ message: error.message, cause: error })
           : new InvalidRequestError({ message: `Failed to resolve auth config: ${error.message}`, cause: error }),
     })
   }

packages/ai/src/route/framing.ts

@@ -8,8 +8,8 @@ import type { AIError } from "../schema/index.js"
  * `Framing` is the byte-stream-shaped seam between transport and protocol:
  *
  * - SSE (`Framing.sse`) — UTF-8 decode the body, run the SSE channel decoder,
- *   drop empty / `[DONE]` keep-alives. Each emitted frame is the JSON `data:`
- *   payload of one event.
+ *   and emit the `data:` payload of each non-empty event. The default drops
+ *   `[DONE]`; protocols that use it as a terminal select `sseWithDone`.
  * - AWS event stream — length-prefixed binary frames with CRC checksums.
  *   Each emitted frame is one parsed binary event record.
  *
@@ -26,6 +26,12 @@ export interface Definition<Frame> {
 /** Server-Sent Events framing. Used by every JSON-streaming HTTP provider. */
 export const sse: Definition<string> = { id: "sse", frame: ProviderShared.sseFraming }
 
+/** Server-Sent Events framing that retains the conventional `[DONE]` sentinel. */
+export const sseWithDone: Definition<string> = {
+  id: "sse",
+  frame: (bytes) => ProviderShared.sseFraming(bytes, undefined, true),
+}
+
 /** SSE framing restricted to protocol-recognized event names. */
 export const sseEvents = (events: ReadonlySet<string>): Definition<string> => ({
   id: "sse",

packages/ai/src/schema/errors.ts

@@ -44,10 +44,7 @@ export class NoRouteError extends Schema.TaggedError<NoRouteError>("AI.Error.NoR
 
 export class AuthenticationError extends Schema.TaggedError<AuthenticationError>("AI.Error.Authentication")(
   "Authentication",
-  {
-    ...ReasonFields,
-    kind: Schema.Literals(["missing", "invalid", "expired", "insufficient-permissions", "unknown"]),
-  },
+  ReasonFields,
 ) {}
 
 export class RateLimitError extends Schema.TaggedError<RateLimitError>("AI.Error.RateLimit")("RateLimit", {

packages/ai/src/schema/events.ts

@@ -112,6 +112,8 @@ export type TextDelta = Schema.Schema.Type<typeof TextDelta>
 export const TextEnd = Schema.Struct({
   type: Schema.tag("text-end"),
   id: ContentBlockID,
+  /** Authoritative complete value; replaces accumulated deltas when present. */
+  text: Schema.optional(Schema.String),
   providerMetadata: Schema.optional(ProviderMetadata),
 }).annotate({ identifier: "LLM.Event.TextEnd" })
 export type TextEnd = Schema.Schema.Type<typeof TextEnd>
@@ -134,6 +136,8 @@ export type ReasoningDelta = Schema.Schema.Type<typeof ReasoningDelta>
 export const ReasoningEnd = Schema.Struct({
   type: Schema.tag("reasoning-end"),
   id: ContentBlockID,
+  /** Authoritative complete value; replaces accumulated deltas when present. */
+  text: Schema.optional(Schema.String),
   providerMetadata: Schema.optional(ProviderMetadata),
 }).annotate({ identifier: "LLM.Event.ReasoningEnd" })
 export type ReasoningEnd = Schema.Schema.Type<typeof ReasoningEnd>
@@ -328,17 +332,32 @@ export const LLMEvent = Object.assign(llmEventTagged, {
 })
 export type LLMEvent = Schema.Schema.Type<typeof llmEventTagged>
 
+/** Joins deltas per fragment, letting an authoritative end value replace that fragment's accumulated deltas. */
+const joinFragments = <Delta extends { id: string; text: string }, End extends { id: string; text?: string }>(
+  events: ReadonlyArray<LLMEvent>,
+  isDelta: (event: LLMEvent) => event is Extract<LLMEvent, Delta>,
+  isEnd: (event: LLMEvent) => event is Extract<LLMEvent, End>,
+) => {
+  const order: string[] = []
+  const parts = new Map<string, string>()
+  for (const event of events) {
+    if (isDelta(event)) {
+      if (!parts.has(event.id)) order.push(event.id)
+      parts.set(event.id, (parts.get(event.id) ?? "") + event.text)
+    }
+    if (isEnd(event) && event.text !== undefined) {
+      if (!parts.has(event.id)) order.push(event.id)
+      parts.set(event.id, event.text)
+    }
+  }
+  return order.map((id) => parts.get(id)).join("")
+}
+
 const responseText = (events: ReadonlyArray<LLMEvent>) =>
-  events
-    .filter(LLMEvent.is.textDelta)
-    .map((event) => event.text)
-    .join("")
+  joinFragments(events, LLMEvent.is.textDelta, LLMEvent.is.textEnd)
 
 const responseReasoning = (events: ReadonlyArray<LLMEvent>) =>
-  events
-    .filter(LLMEvent.is.reasoningDelta)
-    .map((event) => event.text)
-    .join("")
+  joinFragments(events, LLMEvent.is.reasoningDelta, LLMEvent.is.reasoningEnd)
 
 const responseUsage = (events: ReadonlyArray<LLMEvent>) =>
   events.reduce<Usage | undefined>(
@@ -445,10 +464,11 @@ const reduceTextDelta = (state: ResponseState, event: TextDelta): ResponseState
 const reduceTextEnd = (state: ResponseState, event: TextEnd): ResponseState => {
   const current = state.textParts[event.id]
   if (!current) return state
+  const text = event.text ?? current.text
   const providerMetadata = event.providerMetadata ?? current.providerMetadata
   return {
-    ...replaceContent(state, current.contentIndex, textContent(current.text, providerMetadata)),
-    textParts: { ...state.textParts, [event.id]: { ...current, providerMetadata } },
+    ...replaceContent(state, current.contentIndex, textContent(text, providerMetadata)),
+    textParts: { ...state.textParts, [event.id]: { ...current, text, providerMetadata } },
   }
 }
 
@@ -478,10 +498,11 @@ const reduceReasoningDelta = (state: ResponseState, event: ReasoningDelta): Resp
 const reduceReasoningEnd = (state: ResponseState, event: ReasoningEnd): ResponseState => {
   const current = state.reasoningParts[event.id]
   if (!current) return state
+  const text = event.text ?? current.text
   const providerMetadata = event.providerMetadata ?? current.providerMetadata
   return {
-    ...replaceContent(state, current.contentIndex, reasoningContent(current.text, providerMetadata)),
-    reasoningParts: { ...state.reasoningParts, [event.id]: { ...current, providerMetadata } },
+    ...replaceContent(state, current.contentIndex, reasoningContent(text, providerMetadata)),
+    reasoningParts: { ...state.reasoningParts, [event.id]: { ...current, text, providerMetadata } },
   }
 }
 
@@ -579,12 +600,12 @@ export class LLMResponse extends Schema.Class<LLMResponse>("LLM.Response")({
   usage: Schema.optional(Usage),
   finishReason: FinishReasonDetails,
 }) {
-  /** Concatenated assistant text assembled from streamed `text-delta` events. */
+  /** Concatenated assistant text; each fragment's `text-end` value replaces its accumulated deltas when present. */
   get text() {
     return responseText(this.events)
   }
 
-  /** Concatenated reasoning text assembled from streamed `reasoning-delta` events. */
+  /** Concatenated reasoning text; each fragment's `reasoning-end` value replaces its accumulated deltas when present. */
   get reasoning() {
     return responseReasoning(this.events)
   }

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

@@ -11,6 +11,7 @@ describe("provider error classification", () => {
       "Input length 131393 exceeds the maximum allowed input length of 131040 tokens.",
       "The input (516368 tokens) is longer than the model's context length (262144 tokens).",
       "Prompt has 5,958,968 tokens, but the configured context size is 256,000 tokens",
+      "Range of input length should be [1, 129024]",
       "Too many tokens",
       "Token limit exceeded",
     ]
@@ -87,10 +88,12 @@ describe("provider error classification", () => {
     ])
   })
 
-  test("classifies network error text as provider internal", () => {
+  test("classifies any remaining 4xx status as an invalid request", () => {
     expect(
-      ["network error", "network-error", "network_error"].map((message) => classifyProviderFailure({ message })._tag),
-    ).toEqual(["ProviderInternal", "ProviderInternal", "ProviderInternal"])
+      [400, 402, 404, 418, 422, 451].map(
+        (status) => classifyProviderFailure({ message: `HTTP ${status}`, status })._tag,
+      ),
+    ).toEqual(Array(6).fill("InvalidRequest"))
   })
 
   test("classifies nested provider codes when a top-level code is also present", () => {
@@ -103,10 +106,12 @@ describe("provider error classification", () => {
     ).toEqual(["QuotaExceeded", "ProviderInternal", "InvalidRequest"])
   })
 
-  test("keeps unknown and malformed provider payloads non-retryable", () => {
+  test("leaves unrecognized failures unclassified for the retry default", () => {
     expect(classifyProviderFailure({ message: '{"error":{"message":"no_kv_space"}}' })._tag).toBe("UnknownProvider")
     expect(classifyProviderFailure({ message: '{"type":"error","error":{"code":123}}' })._tag).toBe("UnknownProvider")
     expect(classifyProviderFailure({ message: "not-json" })._tag).toBe("UnknownProvider")
+    expect(classifyProviderFailure({ message: "network error" })._tag).toBe("UnknownProvider")
+    expect(classifyProviderFailure({ message: "Provider returned error" })._tag).toBe("UnknownProvider")
   })
 })
 

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

@@ -491,6 +491,59 @@ describe("Bedrock Converse route", () => {
     }),
   )
 
+  it.effect("ignores late tool deltas after contentBlockStop", () =>
+    Effect.gen(function* () {
+      const body = eventStreamBody(
+        [
+          "contentBlockStart",
+          {
+            contentBlockIndex: 0,
+            start: { toolUse: { toolUseId: "tool_1", name: "lookup" } },
+          },
+        ],
+        ["contentBlockDelta", { contentBlockIndex: 0, delta: { toolUse: { input: '{"query":"weather"}' } } }],
+        ["contentBlockStop", { contentBlockIndex: 0 }],
+        ["contentBlockDelta", { contentBlockIndex: 0, delta: { toolUse: { input: '{"late":true}' } } }],
+        ["messageStop", { stopReason: "tool_use" }],
+      )
+      const response = yield* LLMClient.generate(baseRequest).pipe(Effect.provide(fixedBytes(body)))
+
+      expect(response.toolCalls).toEqual([
+        { type: "tool-call", id: "tool_1", name: "lookup", input: { query: "weather" } },
+      ])
+      expect(response.events.filter((event) => event.type === "tool-input-delta")).toEqual([
+        {
+          type: "tool-input-delta",
+          id: "tool_1",
+          name: "lookup",
+          text: '{"query":"weather"}',
+          input: { query: "weather" },
+        },
+      ])
+    }),
+  )
+
+  it.effect("rejects tool deltas without contentBlockStart", () =>
+    Effect.gen(function* () {
+      const error = yield* LLMClient.generate(baseRequest).pipe(
+        Effect.provide(
+          fixedBytes(
+            eventStreamBody(
+              ["contentBlockDelta", { contentBlockIndex: 0, delta: { toolUse: { input: "{}" } } }],
+              ["messageStop", { stopReason: "tool_use" }],
+            ),
+          ),
+        ),
+        Effect.flip,
+      )
+
+      expect(error).toMatchObject({
+        reason: { _tag: "InvalidProviderOutput" },
+        message: "Bedrock Converse tool delta is missing its tool call",
+      })
+    }),
+  )
+
   it.effect("recovers incomplete tool input at finalization", () =>
     Effect.gen(function* () {
       const body = eventStreamBody(

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

@@ -52,7 +52,7 @@ describe("provider error retention", () => {
           Effect.flip,
         )
         expect(error.message).toContain("Slow down")
-        expect(error.reason._tag).toBe(entry.name === "Gemini" ? "ProviderInternal" : "RateLimit")
+        expect(error.reason._tag).toBe("RateLimit")
         expect(error.reason.body).toBe(body)
         expect(error.reason.http).toMatchObject({ status: 200, headers: { "x-provider-trace": "trace-1" } })
         expect(error.reason.http?.url).toStartWith("https://provider.test/")

packages/ai/test/provider/open-responses-lifecycle.test.ts

@@ -0,0 +1,467 @@
+import { describe, expect } from "bun:test"
+import { Effect, Stream } from "effect"
+import { LLM, LLMEvent } from "../../src/index.js"
+import { OpenResponses } from "../../src/protocols/open-responses.js"
+import { configure } from "../../src/providers/openai-compatible-responses.js"
+import { LLMClient } from "../../src/route.js"
+import { it } from "../lib/effect.js"
+import { fixedResponse } from "../lib/http.js"
+import { sseEvents } from "../lib/sse.js"
+
+const request = LLM.request({
+  model: configure({ apiKey: "test-key", baseURL: "https://responses.example.test/v1" }).model("example-model"),
+  prompt: "Respond.",
+})
+const completed = { type: "response.completed", response: { id: "resp_1" } }
+
+const collect = (...input: OpenResponses.Event[]) =>
+  Effect.gen(function* () {
+    const events = yield* LLMClient.stream(request).pipe(
+      Stream.runCollect,
+      Effect.provide(fixedResponse(sseEvents(...input))),
+    )
+    expectLifecycle(
+      events,
+      input.some((event) => event.type === "response.completed"),
+    )
+    return events
+  })
+
+// Deliberately local to these basic-item fixtures, not a general stream validator.
+function expectLifecycle(events: ReadonlyArray<LLMEvent>, completed: boolean) {
+  const active = { text: new Set<string>(), reasoning: new Set<string>() }
+  const tools = new Map<string, "started" | "ended" | "called">()
+  events.forEach((event) => {
+    if (event.type === "text-start" || event.type === "reasoning-start") {
+      const blocks = event.type === "text-start" ? active.text : active.reasoning
+      expect(blocks.size).toBe(0)
+      blocks.add(event.id)
+    }
+    if (event.type === "text-delta" || event.type === "reasoning-delta") {
+      expect((event.type === "text-delta" ? active.text : active.reasoning).has(event.id)).toBe(true)
+    }
+    if (event.type === "text-end" || event.type === "reasoning-end") {
+      expect((event.type === "text-end" ? active.text : active.reasoning).delete(event.id)).toBe(true)
+    }
+    if (event.type === "tool-input-start") {
+      expect(tools.has(event.id)).toBe(false)
+      tools.set(event.id, "started")
+    }
+    if (event.type === "tool-input-delta") expect(tools.get(event.id)).toBe("started")
+    if (event.type === "tool-input-end") {
+      expect(tools.get(event.id)).toBe("started")
+      tools.set(event.id, "ended")
+    }
+    if (event.type === "tool-call") {
+      expect(tools.get(event.id)).toBe("ended")
+      tools.set(event.id, "called")
+    }
+    // Incomplete responses may leave pending tool inputs without a call.
+    if (event.type === "finish" && completed) {
+      expect(active.text.size).toBe(0)
+      expect(active.reasoning.size).toBe(0)
+      expect([...tools.values()].every((status) => status === "called")).toBe(true)
+    }
+  })
+  expect(events.filter(LLMEvent.is.stepStart)).toHaveLength(1)
+  expect(events[0]?.type).toBe("step-start")
+  expect(events.filter(LLMEvent.is.stepFinish)).toHaveLength(1)
+  expect(events.filter(LLMEvent.is.finish)).toHaveLength(1)
+  expect(events.slice(-2).map((event) => event.type)).toEqual(["step-finish", "finish"])
+}
+
+describe("Open Responses basic-item lifecycles", () => {
+  it.effect("closes implicit summary boundaries and ignores late events for completed reasoning", () =>
+    Effect.gen(function* () {
+      const item = { type: "reasoning", id: "rs_1", encrypted_content: "encrypted-state" }
+      const events = yield* collect(
+        { type: "response.output_item.added", output_index: 0, item: { ...item, encrypted_content: null } },
+        { type: "response.output_item.added", item: { ...item, encrypted_content: null } },
+        { type: "response.reasoning_summary_text.delta", item_id: "rs_1", summary_index: 0, delta: "First" },
+        { type: "response.reasoning_summary_part.added", item_id: "rs_1", summary_index: 1 },
+        { type: "response.reasoning_summary_part.done", item_id: "rs_1", summary_index: 0 },
+        { type: "response.reasoning_summary_text.done", item_id: "rs_1", summary_index: 1, text: "Second" },
+        // The third part omits both explicit summary boundaries.
+        {
+          type: "response.reasoning_summary_text.delta",
+          output_index: 0,
+          item_id: "wrong",
+          summary_index: 2,
+          delta: "Third",
+        },
+        { type: "response.output_item.done", item },
+        { type: "response.output_item.done", item },
+        { type: "response.output_item.added", item },
+        { type: "response.reasoning_summary_part.added", item_id: "rs_1", summary_index: 3 },
+        { type: "response.reasoning_summary_text.delta", item_id: "rs_1", summary_index: 3, delta: "late" },
+        { type: "response.reasoning_summary_text.done", item_id: "rs_1", summary_index: 2, text: "late final" },
+        { type: "response.reasoning_summary_part.done", item_id: "rs_1", summary_index: 3 },
+        completed,
+      )
+
+      expect(events.filter((event) => event.type.startsWith("reasoning-"))).toEqual([
+        {
+          type: "reasoning-start",
+          id: "rs_1:0",
+          providerMetadata: { "openai-compatible": { itemId: "rs_1", reasoningEncryptedContent: null } },
+        },
+        { type: "reasoning-delta", id: "rs_1:0", text: "First" },
+        { type: "reasoning-end", id: "rs_1:0", providerMetadata: { "openai-compatible": { itemId: "rs_1" } } },
+        {
+          type: "reasoning-start",
+          id: "rs_1:1",
+          providerMetadata: { "openai-compatible": { itemId: "rs_1", reasoningEncryptedContent: null } },
+        },
+        { type: "reasoning-delta", id: "rs_1:1", text: "Second" },
+        { type: "reasoning-end", id: "rs_1:1", providerMetadata: { "openai-compatible": { itemId: "rs_1" } } },
+        {
+          type: "reasoning-start",
+          id: "rs_1:2",
+          providerMetadata: { "openai-compatible": { itemId: "rs_1", reasoningEncryptedContent: null } },
+        },
+        { type: "reasoning-delta", id: "rs_1:2", text: "Third" },
+        {
+          type: "reasoning-end",
+          id: "rs_1:2",
+          providerMetadata: { "openai-compatible": { itemId: "rs_1", reasoningEncryptedContent: "encrypted-state" } },
+        },
+      ])
+    }),
+  )
+
+  it.effect("preserves done-only encrypted reasoning without replaying its summary or late events", () =>
+    Effect.gen(function* () {
+      const item = {
+        type: "reasoning",
+        id: "rs_1",
+        encrypted_content: "encrypted-state",
+        summary: [{ type: "summary_text", text: "Not streamed" }],
+      }
+      const events = yield* collect(
+        { type: "response.output_item.done", item },
+        { type: "response.output_item.done", item },
+        { type: "response.output_item.added", item },
+        { type: "response.reasoning_summary_text.delta", item_id: "rs_1", delta: "late" },
+        { type: "response.reasoning_summary_part.added", item_id: "rs_1", summary_index: 1 },
+        { type: "response.reasoning_summary_text.done", item_id: "rs_1", summary_index: 1, text: "late final" },
+        completed,
+        // Route termination must also prevent events after response completion.
+        { type: "response.output_item.added", item: { type: "reasoning", id: "rs_after" } },
+      )
+      expect(events.filter((event) => event.type.startsWith("reasoning-"))).toEqual([
+        {
+          type: "reasoning-start",
+          id: "rs_1",
+          providerMetadata: { "openai-compatible": { itemId: "rs_1", reasoningEncryptedContent: "encrypted-state" } },
+        },
+        {
+          type: "reasoning-end",
+          id: "rs_1",
+          providerMetadata: { "openai-compatible": { itemId: "rs_1", reasoningEncryptedContent: "encrypted-state" } },
+        },
+      ])
+    }),
+  )
+
+  it.effect("forgets never-streamed messages at implicit boundaries and preserves refusal phases", () =>
+    Effect.gen(function* () {
+      const events = yield* collect(
+        { type: "response.output_item.added", item: { type: "message", id: "msg_empty" } },
+        { type: "response.output_item.added", item: { type: "message", id: "msg_1", phase: "commentary" } },
+        { type: "response.output_text.done", item_id: "msg_1", text: "Checking" },
+        { type: "response.output_text.done", item_id: "msg_1", text: "Duplicate" },
+        { type: "response.output_item.added", item: { type: "message", id: "msg_2", phase: null } },
+        { type: "response.output_text.delta", item_id: "msg_empty", delta: "stale" },
+        { type: "response.output_text.done", item_id: "msg_empty", text: "stale final" },
+        { type: "response.output_text.delta", item_id: "msg_1", delta: "late" },
+        { type: "response.refusal.delta", item_id: "msg_2", delta: "Cannot help." },
+        { type: "response.refusal.done", item_id: "msg_2", refusal: "Cannot help." },
+        { type: "response.output_item.done", item: { type: "message", id: "msg_2", phase: "final_answer" } },
+        { type: "response.output_item.added", item: { type: "message", id: "msg_3", phase: null } },
+        { type: "response.refusal.done", item_id: "msg_3", refusal: "Done-only refusal." },
+        { type: "response.output_item.done", item: { type: "message", id: "msg_3" } },
+        completed,
+      )
+      expect(events.filter((event) => event.type.startsWith("text-"))).toEqual([
+        {
+          type: "text-start",
+          id: "msg_1",
+          providerMetadata: { "openai-compatible": { itemId: "msg_1", phase: "commentary" } },
+        },
+        { type: "text-delta", id: "msg_1", text: "Checking" },
+        {
+          type: "text-end",
+          id: "msg_1",
+          providerMetadata: { "openai-compatible": { itemId: "msg_1", phase: "commentary" } },
+        },
+        {
+          type: "text-start",
+          id: "msg_2",
+          providerMetadata: { "openai-compatible": { itemId: "msg_2", phase: null } },
+        },
+        { type: "text-delta", id: "msg_2", text: "Cannot help." },
+        {
+          type: "text-end",
+          id: "msg_2",
+          providerMetadata: { "openai-compatible": { itemId: "msg_2", phase: "final_answer" } },
+        },
+        {
+          type: "text-start",
+          id: "msg_3",
+          providerMetadata: { "openai-compatible": { itemId: "msg_3", phase: null } },
+        },
+        { type: "text-delta", id: "msg_3", text: "Done-only refusal." },
+        { type: "text-end", id: "msg_3", providerMetadata: { "openai-compatible": { itemId: "msg_3", phase: null } } },
+      ])
+    }),
+  )
+  it.effect("allows a message to be registered again without inheriting its previous phase", () =>
+    Effect.gen(function* () {
+      const events = yield* collect(
+        { type: "response.output_item.added", item: { type: "message", id: "msg_1", phase: "commentary" } },
+        { type: "response.output_text.delta", item_id: "msg_1", delta: "First" },
+        { type: "response.output_item.done", item: { type: "message", id: "msg_1" } },
+        { type: "response.output_item.added", item: { type: "message", id: "msg_1" } },
+        { type: "response.output_text.delta", item_id: "msg_1", delta: "Second" },
+        { type: "response.output_item.done", item: { type: "message", id: "msg_1" } },
+        completed,
+      )
+      expect(events.filter(LLMEvent.is.textEnd)).toEqual([
+        {
+          type: "text-end",
+          id: "msg_1",
+          providerMetadata: { "openai-compatible": { itemId: "msg_1", phase: "commentary" } },
+        },
+        { type: "text-end", id: "msg_1", providerMetadata: { "openai-compatible": { itemId: "msg_1" } } },
+      ])
+      expect(events.filter(LLMEvent.is.textDelta).map((event) => event.text)).toEqual(["First", "Second"])
+    }),
+  )
+  ;[undefined, "fc_1"].forEach((id) => {
+    it.effect(`opens and closes a done-only tool ${id === undefined ? "without" : "with"} an item id`, () =>
+      Effect.gen(function* () {
+        const item = {
+          type: "function_call",
+          ...(id === undefined ? {} : { id }),
+          call_id: "call_1",
+          name: "lookup",
+          arguments: '{"query":"weather"}',
+        }
+        const events = yield* collect(
+          { type: "response.output_item.done", item },
+          { type: "response.output_item.done", item: { ...item, id: "fc_1" } },
+          { type: "response.output_item.added", item },
+          completed,
+        )
+        const providerMetadata = id === undefined ? undefined : { "openai-compatible": { itemId: id } }
+        expect(events.filter((event) => event.type.startsWith("tool-"))).toEqual([
+          { type: "tool-input-start", id: "call_1", name: "lookup", providerMetadata },
+          { type: "tool-input-end", id: "call_1", name: "lookup", providerMetadata },
+          { type: "tool-call", id: "call_1", name: "lookup", input: { query: "weather" }, providerMetadata },
+        ])
+        expect(events.filter(LLMEvent.is.finish)).toEqual([
+          {
+            type: "finish",
+            reason: { normalized: "tool-calls", raw: undefined },
+            providerMetadata: { "openai-compatible": { responseId: "resp_1", serviceTier: undefined } },
+          },
+        ])
+      }),
+    )
+
+    it.effect(`deduplicates a pending call whose item id is ${id === undefined ? "introduced" : "omitted"} later`, () =>
+      Effect.gen(function* () {
+        const item = { type: "function_call", call_id: "call_1", name: "lookup" }
+        const first = { ...item, ...(id === undefined ? {} : { id }) }
+        const duplicate = { ...item, ...(id === undefined ? { id: "fc_1" } : {}) }
+        const events = yield* collect(
+          { type: "response.output_item.added", item: first },
+          { type: "response.function_call_arguments.delta", item_id: id ?? "call_1", delta: '{"query":"weather"}' },
+          { type: "response.output_item.added", item: duplicate },
+          { type: "response.output_item.done", item: duplicate },
+          { type: "response.output_item.done", item: first },
+          { type: "response.output_item.added", item: duplicate },
+          completed,
+        )
+        // Identity metadata comes from the first admission, not the duplicate.
+        const providerMetadata = id === undefined ? undefined : { "openai-compatible": { itemId: id } }
+        expect(events.filter((event) => event.type.startsWith("tool-"))).toEqual([
+          { type: "tool-input-start", id: "call_1", name: "lookup", providerMetadata },
+          {
+            type: "tool-input-delta",
+            id: "call_1",
+            name: "lookup",
+            text: '{"query":"weather"}',
+            input: { query: "weather" },
+          },
+          { type: "tool-input-end", id: "call_1", name: "lookup", providerMetadata },
+          { type: "tool-call", id: "call_1", name: "lookup", input: { query: "weather" }, providerMetadata },
+        ])
+      }),
+    )
+  })
+
+  it.effect("recovers pending items in completed output order with terminal encrypted metadata", () =>
+    Effect.gen(function* () {
+      const events = yield* collect(
+        {
+          type: "response.output_item.added",
+          item: { type: "function_call", id: "fc_1", call_id: "call_1", name: "lookup" },
+        },
+        { type: "response.function_call_arguments.delta", item_id: "fc_1", delta: '{"query":"draft"}' },
+        { type: "response.output_item.added", item: { type: "reasoning", id: "rs_1", encrypted_content: null } },
+        { type: "response.reasoning_summary_text.delta", item_id: "rs_1", delta: "Thinking" },
+        { type: "response.reasoning_summary_part.done", item_id: "rs_1", summary_index: 0 },
+        {
+          type: "response.completed",
+          response: {
+            id: "resp_1",
+            output: [
+              { type: "reasoning", id: "rs_1", encrypted_content: "terminal-state" },
+              { type: "function_call", id: "fc_1", call_id: "call_1", name: "lookup", arguments: '{"query":"final"}' },
+              { type: "function_call", id: "fc_unseen", call_id: "call_unseen", name: "lookup", arguments: "{}" },
+            ],
+          },
+        },
+      )
+      expect(events.slice(5, -2)).toEqual([
+        {
+          type: "reasoning-end",
+          id: "rs_1:0",
+          providerMetadata: { "openai-compatible": { itemId: "rs_1", reasoningEncryptedContent: "terminal-state" } },
+        },
+        {
+          type: "tool-input-end",
+          id: "call_1",
+          name: "lookup",
+          providerMetadata: { "openai-compatible": { itemId: "fc_1" } },
+        },
+        {
+          type: "tool-call",
+          id: "call_1",
+          name: "lookup",
+          input: { query: "final" },
+          providerMetadata: { "openai-compatible": { itemId: "fc_1" } },
+        },
+      ])
+    }),
+  )
+
+  it.effect("preserves call identity and pending order when an item id is reused", () =>
+    Effect.gen(function* () {
+      const first = { type: "function_call", id: "fc_1", call_id: "call_1", name: "lookup", arguments: "{}" }
+      const events = yield* collect(
+        { type: "response.output_item.added", item: first },
+        { type: "response.output_item.added", item: { ...first, id: "fc_2", call_id: "call_2" } },
+        { type: "response.output_item.done", item: first },
+        { type: "response.output_item.added", item: { ...first, call_id: "call_3" } },
+        { type: "response.output_item.done", item: first },
+        completed,
+      )
+      expect(events.filter(LLMEvent.is.toolCall).map((event) => event.id)).toEqual(["call_1", "call_2", "call_3"])
+    }),
+  )
+
+  it.effect("keeps text and reasoning identities separate even with empty item ids", () =>
+    Effect.gen(function* () {
+      const events = yield* collect(
+        { type: "response.output_item.added", item: { type: "reasoning", id: "" } },
+        { type: "response.output_item.added", item: { type: "message", id: "" } },
+        { type: "response.output_item.added", item: { type: "reasoning", id: "" } },
+        { type: "response.reasoning_summary_text.delta", item_id: "", delta: "Thinking" },
+        { type: "response.output_text.delta", item_id: "", delta: "Answer" },
+        { type: "response.output_item.done", item: { type: "reasoning", id: "", encrypted_content: "state" } },
+        { type: "response.output_item.done", item: { type: "message", id: "" } },
+        completed,
+      )
+      expect(events.filter(LLMEvent.is.reasoningDelta).map((event) => event.text)).toEqual(["Thinking"])
+      expect(events.filter(LLMEvent.is.textDelta).map((event) => event.text)).toEqual(["Answer"])
+      expect(events.filter(LLMEvent.is.reasoningEnd)).toEqual([
+        {
+          type: "reasoning-end",
+          id: ":0",
+          providerMetadata: { "openai-compatible": { itemId: "", reasoningEncryptedContent: "state" } },
+        },
+      ])
+    }),
+  )
+
+  it.effect("does not recover a completed tool from a tracked message with the same id", () =>
+    Effect.gen(function* () {
+      const events = yield* collect(
+        { type: "response.output_item.added", item: { type: "message", id: "item_1" } },
+        { type: "response.output_text.delta", item_id: "item_1", delta: "Answer" },
+        {
+          type: "response.completed",
+          response: {
+            id: "resp_1",
+            output: [{ type: "function_call", id: "item_1", call_id: "call_1", name: "lookup", arguments: "{}" }],
+          },
+        },
+      )
+      expect(events.filter(LLMEvent.is.toolCall)).toEqual([])
+      expect(events.filter(LLMEvent.is.finish).map((event) => event.reason.normalized)).toEqual(["stop"])
+    }),
+  )
+
+  it.effect("flushes pending calls and open text when completed output is absent", () =>
+    Effect.gen(function* () {
+      const events = yield* collect(
+        { type: "response.output_item.added", item: { type: "message", id: "msg_1", phase: "final_answer" } },
+        { type: "response.output_text.delta", item_id: "msg_1", delta: "Answer" },
+        {
+          type: "response.output_item.added",
+          item: { type: "function_call", call_id: "call_1", name: "lookup", arguments: "{}" },
+        },
+        completed,
+      )
+      // Generic terminal closure does not repeat the message's phase metadata.
+      expect(events.slice(4, -2)).toEqual([
+        { type: "tool-input-end", id: "call_1", name: "lookup" },
+        { type: "tool-call", id: "call_1", name: "lookup", input: {} },
+        { type: "text-end", id: "msg_1" },
+      ])
+    }),
+  )
+
+  it.effect("does not reconcile pending calls or terminal reasoning metadata on incomplete responses", () =>
+    Effect.gen(function* () {
+      const events = yield* collect(
+        { type: "response.output_item.added", item: { type: "reasoning", id: "rs_1", encrypted_content: null } },
+        { type: "response.reasoning_summary_text.delta", item_id: "rs_1", delta: "Partial" },
+        {
+          type: "response.output_item.added",
+          item: { type: "function_call", id: "fc_1", call_id: "call_1", name: "lookup" },
+        },
+        { type: "response.function_call_arguments.delta", item_id: "fc_1", delta: '{"query":' },
+        {
+          type: "response.incomplete",
+          response: {
+            id: "resp_1",
+            incomplete_details: { reason: "max_output_tokens" },
+            output: [
+              { type: "reasoning", id: "rs_1", encrypted_content: "not-reconciled" },
+              {
+                type: "function_call",
+                id: "fc_1",
+                call_id: "call_1",
+                name: "lookup",
+                arguments: '{"query":"not-reconciled"}',
+              },
+            ],
+          },
+        },
+      )
+      expect(events.filter(LLMEvent.is.toolInputEnd)).toEqual([])
+      expect(events.filter(LLMEvent.is.toolCall)).toEqual([])
+      expect(events.filter(LLMEvent.is.reasoningEnd)).toEqual([{ type: "reasoning-end", id: "rs_1:0" }])
+      expect(events.filter(LLMEvent.is.finish)).toEqual([
+        {
+          type: "finish",
+          reason: { normalized: "length", raw: "max_output_tokens" },
+          providerMetadata: { "openai-compatible": { responseId: "resp_1", serviceTier: undefined } },
+        },
+      ])
+    }),
+  )
+})

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

@@ -7,6 +7,7 @@ import {
   AIError,
   LLMEvent,
   LLMRequest,
+  LLMResponse,
   Message,
   LanguageModel,
   ToolCallPart,
@@ -807,6 +808,28 @@ describe("OpenAI Chat route", () => {
     }),
   )
 
+  it.effect("finishes at the done sentinel without waiting for response EOF", () =>
+    Effect.gen(function* () {
+      const stream = new ReadableStream<Uint8Array>({
+        start(controller) {
+          controller.enqueue(
+            new TextEncoder().encode(sseEvents(deltaChunk({ content: "Hello" }), deltaChunk({}, "stop"))),
+          )
+        },
+      })
+      const response = yield* LLMClient.generate(request).pipe(
+        Effect.provide(
+          fixedResponse(stream, {
+            headers: { "content-type": "text/event-stream" },
+          }),
+        ),
+      )
+
+      expect(response.text).toBe("Hello")
+      expect(response.events.at(-1)?.type).toBe("finish")
+    }),
+  )
+
   it.effect("preserves streamed refusals as ordinary assistant text", () =>
     Effect.gen(function* () {
       const response = yield* LLMClient.generate(request).pipe(
@@ -1127,7 +1150,7 @@ describe("OpenAI Chat route", () => {
     }),
   )
 
-  it.effect("preserves scalar reasoning after content starts", () =>
+  it.effect("preserves scalar reasoning after content starts in one lifecycle", () =>
     Effect.gen(function* () {
       const details = [{ type: "reasoning.text", text: "detail", format: "unknown", index: 0 }]
       const response = yield* LLMClient.generate(request).pipe(
@@ -1144,8 +1167,35 @@ describe("OpenAI Chat route", () => {
       )
 
       expect(response.reasoning).toBe("detailscalar")
-      expect(response.events.filter(LLMEvent.is.reasoningStart)).toHaveLength(2)
-      expect(response.events.filter(LLMEvent.is.reasoningEnd)).toHaveLength(2)
+      expect(response.events.filter(LLMEvent.is.reasoningStart)).toHaveLength(1)
+      expect(response.events.filter(LLMEvent.is.reasoningEnd)).toHaveLength(1)
+      expect(response.message.content.filter((part) => part.type === "reasoning")).toHaveLength(1)
+      expect(response.message.content.find((part) => part.type === "reasoning")?.providerMetadata).toEqual({
+        openai: { reasoningField: "reasoning", reasoningDetails: details },
+      })
+    }),
+  )
+
+  it.effect("keeps one reasoning lifecycle across many content chunks", () =>
+    Effect.gen(function* () {
+      const details = [{ type: "reasoning.text", text: "thinking", format: "anthropic-claude-v1", index: 0 }]
+      const response = yield* LLMClient.generate(request).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              { choices: [{ delta: { reasoning: "thinking", reasoning_details: details } }] },
+              ...Array.from({ length: 25 }, (_, index) => deltaChunk({ content: `chunk-${index} ` })),
+              deltaChunk({}, "stop"),
+            ),
+          ),
+        ),
+      )
+
+      expect(response.reasoning).toBe("thinking")
+      expect(response.text).toBe(Array.from({ length: 25 }, (_, index) => `chunk-${index} `).join(""))
+      expect(response.events.filter(LLMEvent.is.reasoningStart)).toHaveLength(1)
+      expect(response.events.filter(LLMEvent.is.reasoningEnd)).toHaveLength(1)
+      expect(response.message.content.filter((part) => part.type === "reasoning")).toHaveLength(1)
       expect(response.message.content.find((part) => part.type === "reasoning")?.providerMetadata).toEqual({
         openai: { reasoningField: "reasoning", reasoningDetails: details },
       })
@@ -1191,7 +1241,18 @@ describe("OpenAI Chat route", () => {
           index: 0,
         },
       ]
-      const response = yield* LLMClient.generate(request).pipe(
+      // Snapshot reasoning-end metadata as each event is published so the
+      // assertion cannot pass through later mutation of a shared array.
+      const publishedEndMetadata: unknown[] = []
+      const response = yield* LLMClient.stream(request).pipe(
+        Stream.tap((event) =>
+          Effect.sync(() => {
+            if (LLMEvent.is.reasoningEnd(event))
+              publishedEndMetadata.push(decodeJson(encodeJson(event.providerMetadata)))
+          }),
+        ),
+        Stream.runFold(LLMResponse.empty, LLMResponse.reduce),
+        Effect.map((state) => LLMResponse.complete(state)!),
         Effect.provide(
           fixedResponse(
             sseEvents(
@@ -1212,10 +1273,12 @@ describe("OpenAI Chat route", () => {
       expect(response.events.filter(LLMEvent.is.reasoningStart)).toHaveLength(1)
       expect(response.events.filter(LLMEvent.is.reasoningDelta)).toHaveLength(1)
       expect(response.events.filter(LLMEvent.is.reasoningEnd)).toHaveLength(1)
-      expect(response.events.filter(LLMEvent.is.reasoningEnd).at(-1)?.providerMetadata).toEqual({
-        openai: { reasoningField: "reasoning", reasoningDetails: merged },
-      })
-      expect(response.events.findIndex(LLMEvent.is.reasoningEnd)).toBeLessThan(
+      expect(publishedEndMetadata).toEqual([{ openai: { reasoningField: "reasoning", reasoningDetails: merged } }])
+      expect(response.events.findIndex(LLMEvent.is.reasoningStart)).toBeLessThan(
+        response.events.findIndex(LLMEvent.is.textStart),
+      )
+      // Reasoning stays open alongside text and closes once during finalization.
+      expect(response.events.findIndex(LLMEvent.is.reasoningEnd)).toBeGreaterThan(
         response.events.findIndex(LLMEvent.is.textStart),
       )
 

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

@@ -405,6 +405,19 @@ describe("OpenAI-compatible Chat route", () => {
     }),
   )
 
+  it.effect("ignores events after the done sentinel", () =>
+    Effect.gen(function* () {
+      const body = `${sseEvents(
+        deltaChunk({ content: "Hello" }),
+        deltaChunk({}, "stop"),
+      )}data: ${JSON.stringify(deltaChunk({ content: " late" }))}\n\n`
+      const response = yield* LLMClient.generate(request).pipe(Effect.provide(fixedResponse(body)))
+
+      expect(response.text).toBe("Hello")
+      expect(response.finishReason).toEqual({ normalized: "stop", raw: "stop" })
+    }),
+  )
+
   it.effect("accepts nullable usage and preserves provider fields", () =>
     Effect.gen(function* () {
       const response = yield* LLMClient.generate(request).pipe(

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

@@ -2750,6 +2750,227 @@ describe("OpenAI Responses route", () => {
     }),
   )
 
+  it.effect("concludes reasoning at implicit summary boundaries", () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(
+        LLMRequest.update(request, { providerOptions: { store: false } }),
+      ).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              {
+                type: "response.output_item.added",
+                item: { type: "reasoning", id: "rs_1", encrypted_content: null },
+              },
+              { type: "response.reasoning_summary_part.added", item_id: "rs_1", summary_index: 0 },
+              { type: "response.reasoning_summary_text.delta", item_id: "rs_1", summary_index: 0, delta: "First" },
+              // The next part is enough to conclude the previous one even when
+              // its done event is delayed.
+              { type: "response.reasoning_summary_part.added", item_id: "rs_1", summary_index: 1 },
+              { type: "response.reasoning_summary_part.done", item_id: "rs_1", summary_index: 0 },
+              { type: "response.reasoning_summary_text.delta", item_id: "rs_1", summary_index: 1, delta: "Second" },
+              { type: "response.reasoning_summary_part.done", item_id: "rs_1", summary_index: 1 },
+              // Some compatible providers begin the next part with its first delta.
+              { type: "response.reasoning_summary_text.delta", item_id: "rs_1", summary_index: 2, delta: "Third" },
+              {
+                type: "response.output_item.done",
+                item: { type: "reasoning", id: "rs_1", encrypted_content: "encrypted-state" },
+              },
+              { type: "response.completed", response: { id: "resp_1" } },
+            ),
+          ),
+        ),
+      )
+
+      expect(response.reasoning).toBe("FirstSecondThird")
+      expect(response.events.filter((event) => event.type.startsWith("reasoning-"))).toEqual([
+        {
+          type: "reasoning-start",
+          id: "rs_1:0",
+          providerMetadata: { openai: { itemId: "rs_1", reasoningEncryptedContent: null } },
+        },
+        { type: "reasoning-delta", id: "rs_1:0", text: "First", providerMetadata: undefined },
+        { type: "reasoning-end", id: "rs_1:0", providerMetadata: { openai: { itemId: "rs_1" } } },
+        {
+          type: "reasoning-start",
+          id: "rs_1:1",
+          providerMetadata: { openai: { itemId: "rs_1", reasoningEncryptedContent: null } },
+        },
+        { type: "reasoning-delta", id: "rs_1:1", text: "Second", providerMetadata: undefined },
+        {
+          type: "reasoning-end",
+          id: "rs_1:1",
+          providerMetadata: { openai: { itemId: "rs_1" } },
+        },
+        {
+          type: "reasoning-start",
+          id: "rs_1:2",
+          providerMetadata: { openai: { itemId: "rs_1", reasoningEncryptedContent: null } },
+        },
+        { type: "reasoning-delta", id: "rs_1:2", text: "Third", providerMetadata: undefined },
+        {
+          type: "reasoning-end",
+          id: "rs_1:2",
+          providerMetadata: { openai: { itemId: "rs_1", reasoningEncryptedContent: "encrypted-state" } },
+        },
+      ])
+    }),
+  )
+
+  it.effect("rejects a reasoning item that starts before the previous item ends", () =>
+    Effect.gen(function* () {
+      const error = yield* LLMClient.generate(request).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              { type: "response.output_item.added", item: { type: "reasoning", id: "rs_1" } },
+              { type: "response.reasoning_summary_text.delta", item_id: "rs_1", summary_index: 0, delta: "First" },
+              { type: "response.output_item.added", item: { type: "reasoning", id: "rs_2" } },
+            ),
+          ),
+        ),
+        Effect.flip,
+      )
+
+      expect(error.reason._tag).toBe("InvalidProviderOutput")
+      expect(error.message).toContain("started reasoning before the previous item ended")
+    }),
+  )
+
+  it.effect("concludes text at implicit message boundaries", () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(request).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              // An item that never streams text is untracked at the boundary too.
+              { type: "response.output_item.added", item: { type: "message", id: "msg_0" } },
+              { type: "response.output_item.added", item: { type: "message", id: "msg_1" } },
+              { type: "response.output_text.delta", item_id: "msg_1", delta: "First" },
+              // The previous message's done event is missing; the next message
+              // item is the boundary for its open text.
+              { type: "response.output_item.added", item: { type: "message", id: "msg_2" } },
+              // Late deltas for concluded or untracked messages must stay no-ops.
+              { type: "response.output_text.delta", item_id: "msg_1", delta: " late" },
+              { type: "response.output_text.delta", item_id: "msg_0", delta: " stale" },
+              { type: "response.output_text.delta", item_id: "msg_2", delta: "Second" },
+              { type: "response.output_item.done", item: { type: "message", id: "msg_2" } },
+              { type: "response.completed", response: { id: "resp_1" } },
+            ),
+          ),
+        ),
+      )
+
+      expect(response.text).toBe("FirstSecond")
+      expect(response.events.filter((event) => event.type.startsWith("text-"))).toMatchObject([
+        { type: "text-start", id: "msg_1" },
+        { type: "text-delta", id: "msg_1", text: "First" },
+        { type: "text-end", id: "msg_1" },
+        { type: "text-start", id: "msg_2" },
+        { type: "text-delta", id: "msg_2", text: "Second" },
+        { type: "text-end", id: "msg_2" },
+      ])
+    }),
+  )
+
+  it.effect("opens the tool lifecycle for a done-only function call", () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(request).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              // No output_item.added: the call arrives only as a completed item.
+              {
+                type: "response.output_item.done",
+                item: {
+                  type: "function_call",
+                  id: "fc_1",
+                  call_id: "call_1",
+                  name: "lookup",
+                  arguments: '{"query":"weather"}',
+                },
+              },
+              { type: "response.completed", response: { id: "resp_1" } },
+            ),
+          ),
+        ),
+      )
+
+      expect(response.events.filter((event) => event.type.startsWith("tool-"))).toMatchObject([
+        { type: "tool-input-start", id: "call_1", name: "lookup" },
+        { type: "tool-input-end", id: "call_1", name: "lookup" },
+        { type: "tool-call", id: "call_1", name: "lookup", input: { query: "weather" } },
+      ])
+      expect(response.finishReason.normalized).toBe("tool-calls")
+    }),
+  )
+
+  it.effect("ignores duplicate item boundary events", () =>
+    Effect.gen(function* () {
+      const response = yield* LLMClient.generate(request).pipe(
+        Effect.provide(
+          fixedResponse(
+            sseEvents(
+              { type: "response.output_item.added", item: { type: "reasoning", id: "rs_1" } },
+              // Duplicate added for a known item is not overlap and must no-op.
+              { type: "response.output_item.added", item: { type: "reasoning", id: "rs_1" } },
+              { type: "response.reasoning_summary_text.delta", item_id: "rs_1", summary_index: 0, delta: "Think" },
+              { type: "response.output_item.done", item: { type: "reasoning", id: "rs_1" } },
+              { type: "response.output_item.done", item: { type: "reasoning", id: "rs_1" } },
+              {
+                type: "response.output_item.added",
+                item: { type: "function_call", id: "fc_1", call_id: "call_1", name: "lookup", arguments: "" },
+              },
+              {
+                type: "response.output_item.added",
+                item: { type: "function_call", id: "fc_1", call_id: "call_1", name: "lookup", arguments: "" },
+              },
+              { type: "response.function_call_arguments.delta", item_id: "fc_1", delta: '{"query":"weather"}' },
+              {
+                type: "response.output_item.done",
+                item: {
+                  type: "function_call",
+                  id: "fc_1",
+                  call_id: "call_1",
+                  name: "lookup",
+                  arguments: '{"query":"weather"}',
+                },
+              },
+              {
+                type: "response.output_item.done",
+                item: {
+                  type: "function_call",
+                  id: "fc_1",
+                  call_id: "call_1",
+                  name: "lookup",
+                  arguments: '{"query":"weather"}',
+                },
+              },
+              // Duplicates that drop the item id still resolve the same call.
+              {
+                type: "response.output_item.done",
+                item: { type: "function_call", call_id: "call_1", name: "lookup", arguments: '{"query":"weather"}' },
+              },
+              {
+                type: "response.output_item.added",
+                item: { type: "function_call", call_id: "call_1", name: "lookup", arguments: "" },
+              },
+              { type: "response.completed", response: { id: "resp_1" } },
+            ),
+          ),
+        ),
+      )
+
+      expect(response.reasoning).toBe("Think")
+      expect(response.events.filter((event) => event.type === "reasoning-start")).toHaveLength(1)
+      expect(response.events.filter((event) => event.type === "reasoning-end")).toHaveLength(1)
+      expect(response.events.filter((event) => event.type === "tool-input-start")).toHaveLength(1)
+      expect(response.events.filter(LLMEvent.is.toolCall)).toEqual([
+        expect.objectContaining({ id: "call_1", input: { query: "weather" } }),
+      ])
+    }),
+  )
+
   it.effect("reconciles reasoning summaries that arrive only as finals", () =>
     Effect.gen(function* () {
       const response = yield* LLMClient.generate(

packages/ai/test/response.test.ts

@@ -104,6 +104,60 @@ describe("LLMResponse reducer", () => {
     ])
   })
 
+  test("authoritative text-end value replaces accumulated deltas", () => {
+    const response = LLMResponse.fromEvents([
+      LLMEvent.textStart({ id: "t1" }),
+      LLMEvent.textDelta({ id: "t1", text: "Hel" }),
+      LLMEvent.textEnd({ id: "t1", text: "Hello!" }),
+      LLMEvent.finish({ reason: { normalized: "stop" } }),
+    ])
+
+    expect(response?.message.content).toEqual([{ type: "text", text: "Hello!" }])
+    expect(response?.text).toBe("Hello!")
+  })
+
+  test("text-end without value keeps joined deltas", () => {
+    const response = LLMResponse.fromEvents([
+      LLMEvent.textStart({ id: "t1" }),
+      LLMEvent.textDelta({ id: "t1", text: "Hel" }),
+      LLMEvent.textDelta({ id: "t1", text: "lo" }),
+      LLMEvent.textEnd({ id: "t1" }),
+      LLMEvent.finish({ reason: { normalized: "stop" } }),
+    ])
+
+    expect(response?.message.content).toEqual([{ type: "text", text: "Hello" }])
+    expect(response?.text).toBe("Hello")
+  })
+
+  test("authoritative reasoning-end value replaces only its own fragment", () => {
+    const response = LLMResponse.fromEvents([
+      LLMEvent.reasoningStart({ id: "r1:0" }),
+      LLMEvent.reasoningDelta({ id: "r1:0", text: "First summ" }),
+      LLMEvent.reasoningEnd({ id: "r1:0", text: "First summary." }),
+      LLMEvent.reasoningStart({ id: "r1:1" }),
+      LLMEvent.reasoningDelta({ id: "r1:1", text: "Second summary." }),
+      LLMEvent.reasoningEnd({ id: "r1:1" }),
+      LLMEvent.finish({ reason: { normalized: "stop" } }),
+    ])
+
+    expect(response?.message.content).toEqual([
+      { type: "reasoning", text: "First summary." },
+      { type: "reasoning", text: "Second summary." },
+    ])
+    expect(response?.reasoning).toBe("First summary.Second summary.")
+  })
+
+  test("end value recovers a fragment that streamed no deltas", () => {
+    const response = LLMResponse.fromEvents([
+      LLMEvent.textStart({ id: "t1" }),
+      LLMEvent.textEnd({ id: "t1", text: "Hello!" }),
+      LLMEvent.finish({ reason: { normalized: "stop" } }),
+    ])
+
+    expect(response?.message.content).toEqual([{ type: "text", text: "Hello!" }])
+    expect(response?.text).toBe("Hello!")
+  })
+
   test("clears malformed tool input without appending an executable call", () => {
     const state = reduce([
       LLMEvent.toolInputStart({ id: "call_1", name: "lookup" }),

packages/ai/test/schema.test.ts

@@ -250,7 +250,7 @@ test("AI error reasons are tagged Errors with required messages", () => {
       provider: model.provider,
       model: model.id,
     }),
-    new AuthenticationError({ message: "Missing credentials", kind: "missing" }),
+    new AuthenticationError({ message: "Missing credentials" }),
     new RateLimitError({ message: "Rate limited" }),
     new QuotaExceededError({ message: "Quota exceeded" }),
     new ContentPolicyError({ message: "Content blocked" }),

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

@@ -84,15 +84,12 @@ export default Runtime.handler(Commands, (input) =>
         update: (update) => runPromise(config.update(update)),
       },
       packages: {
-        resolve: (spec, install = true, revision) =>
+        resolve: (spec, install = true) =>
           runPromise(
-            install
-              ? npm.add(spec, { subpaths: ["tui"], revision })
-              : npm.resolve(spec, { subpaths: ["tui"], revision }),
+            (install ? npm.add(spec, { subpaths: ["tui"] }) : npm.resolve(spec, { subpaths: ["tui"] })).pipe(
+              Effect.map((result) => result.entrypoint),
+            ),
           ),
-        check: (spec) => runPromise(npm.check(spec)),
-        update: (spec) => runPromise(npm.update(spec, { subpaths: ["tui"] })),
-        reload: (spec, options) => runPromise(npm.reload(spec, { subpaths: ["tui"], ...options })),
       },
       environment: requestedServer === undefined ? Env.session() : undefined,
       terminalHandoff: () => preflight.finish(),

packages/client/src/effect/api/api.ts

@@ -88,32 +88,8 @@ export type PluginListInput = {
 export type PluginListOutput = { readonly location: Location.Info; readonly data: ReadonlyArray<Plugin.Info> }
 export type PluginListOperation<E = never> = (input?: PluginListInput) => Effect.Effect<PluginListOutput, E>
 
-export type PluginCheckInput = {
-  readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
-  readonly target: string
-}
-export type PluginCheckOutput = { readonly location: Location.Info; readonly data: Plugin.PackageStatus }
-export type PluginCheckOperation<E = never> = (input: PluginCheckInput) => Effect.Effect<PluginCheckOutput, E>
-
-export type PluginUpdateInput = {
-  readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
-  readonly target: string
-}
-export type PluginUpdateOutput = { readonly location: Location.Info; readonly data: ReadonlyArray<Plugin.Info> }
-export type PluginUpdateOperation<E = never> = (input: PluginUpdateInput) => Effect.Effect<PluginUpdateOutput, E>
-
-export type PluginReloadInput = {
-  readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
-  readonly target: string
-}
-export type PluginReloadOutput = { readonly location: Location.Info; readonly data: ReadonlyArray<Plugin.Info> }
-export type PluginReloadOperation<E = never> = (input: PluginReloadInput) => Effect.Effect<PluginReloadOutput, E>
-
 export interface PluginApi<E = never> {
   readonly list: PluginListOperation<E>
-  readonly check: PluginCheckOperation<E>
-  readonly update: PluginUpdateOperation<E>
-  readonly reload: PluginReloadOperation<E>
 }
 
 export type SessionListInput = {

packages/client/src/effect/generated/client.ts

@@ -15,12 +15,6 @@ import type {
   AgentGetOutput,
   PluginListInput,
   PluginListOutput,
-  PluginCheckInput,
-  PluginCheckOutput,
-  PluginUpdateInput,
-  PluginUpdateOutput,
-  PluginReloadInput,
-  PluginReloadOutput,
   SessionListInput,
   SessionListOutput,
   SessionStatsInput,
@@ -322,33 +316,7 @@ const EndpointPluginList = (raw: RawClient["server.plugin"]) => (input?: PluginL
     raw["plugin.list"]({ query: { location: input?.["location"] } }).pipe(Effect.mapError(mapClientError)),
   )
 
-const EndpointPluginCheck = (raw: RawClient["server.plugin"]) => (input: PluginCheckInput) =>
-  preserveEffect<PluginCheckOutput>()(
-    raw["plugin.check"]({ query: { location: input["location"] }, payload: { target: input["target"] } }).pipe(
-      Effect.mapError(mapClientError),
-    ),
-  )
-
-const EndpointPluginUpdate = (raw: RawClient["server.plugin"]) => (input: PluginUpdateInput) =>
-  preserveEffect<PluginUpdateOutput>()(
-    raw["plugin.update"]({ query: { location: input["location"] }, payload: { target: input["target"] } }).pipe(
-      Effect.mapError(mapClientError),
-    ),
-  )
-
-const EndpointPluginReload = (raw: RawClient["server.plugin"]) => (input: PluginReloadInput) =>
-  preserveEffect<PluginReloadOutput>()(
-    raw["plugin.reload"]({ query: { location: input["location"] }, payload: { target: input["target"] } }).pipe(
-      Effect.mapError(mapClientError),
-    ),
-  )
-
-const adaptGroupPlugin = (raw: RawClient["server.plugin"]) => ({
-  list: EndpointPluginList(raw),
-  check: EndpointPluginCheck(raw),
-  update: EndpointPluginUpdate(raw),
-  reload: EndpointPluginReload(raw),
-})
+const adaptGroupPlugin = (raw: RawClient["server.plugin"]) => ({ list: EndpointPluginList(raw) })
 
 const EndpointSessionList = (raw: RawClient["server.session"]) => (input?: SessionListInput) =>
   preserveEffect<SessionListOutput>()(

packages/client/src/promise/generated/client.ts

@@ -9,12 +9,6 @@ import type {
   AgentGetOutput,
   PluginListInput,
   PluginListOutput,
-  PluginCheckInput,
-  PluginCheckOutput,
-  PluginUpdateInput,
-  PluginUpdateOutput,
-  PluginReloadInput,
-  PluginReloadOutput,
   SessionListInput,
   SessionListOutput,
   SessionStatsInput,
@@ -466,45 +460,6 @@ export function make(options: ClientOptions) {
           },
           requestOptions,
         ),
-      check: (input: PluginCheckInput, requestOptions?: RequestOptions) =>
-        request<PluginCheckOutput>(
-          {
-            method: "POST",
-            path: `/api/plugin/check`,
-            query: { location: input["location"] },
-            body: { target: input["target"] },
-            successStatus: 200,
-            declaredStatuses: [400, 401],
-            empty: false,
-          },
-          requestOptions,
-        ),
-      update: (input: PluginUpdateInput, requestOptions?: RequestOptions) =>
-        request<PluginUpdateOutput>(
-          {
-            method: "POST",
-            path: `/api/plugin/update`,
-            query: { location: input["location"] },
-            body: { target: input["target"] },
-            successStatus: 200,
-            declaredStatuses: [400, 401],
-            empty: false,
-          },
-          requestOptions,
-        ),
-      reload: (input: PluginReloadInput, requestOptions?: RequestOptions) =>
-        request<PluginReloadOutput>(
-          {
-            method: "POST",
-            path: `/api/plugin/reload`,
-            query: { location: input["location"] },
-            body: { target: input["target"] },
-            successStatus: 200,
-            declaredStatuses: [400, 401],
-            empty: false,
-          },
-          requestOptions,
-        ),
     },
     session: {
       list: (input?: SessionListInput, requestOptions?: RequestOptions) =>

packages/client/src/promise/generated/types.ts

@@ -16,8 +16,6 @@ export type PluginSource =
   | { type: "local"; path: string }
   | { type: "sdk" }
 
-export type PluginPackageStatus = { installed?: string; available?: string; mutable: boolean }
-
 export type SessionForkBoundary = { type: "before"; messageID: string } | { type: "through"; messageID: string }
 
 export type MoneyUSD = number
@@ -435,24 +433,8 @@ export type ProviderRequest = {
 export type PermissionRule = { action: string; resource: string; effect: PermissionEffect }
 
 export type PluginInfo =
-  | {
-      id: string
-      source: PluginSource
-      status: "active"
-      tui: boolean
-      revision?: string
-      generation?: string
-      error?: string
-    }
-  | {
-      id?: string
-      source: PluginSource
-      status: "failed"
-      error: string
-      tui: boolean
-      revision?: string
-      generation?: string
-    }
+  | { id: string; source: PluginSource; status: "active"; tui: boolean }
+  | { id?: string; source: PluginSource; status: "failed"; error: string; tui: boolean }
 
 export type SessionMessageLocationSwitched = {
   id: string
@@ -2348,10 +2330,6 @@ export type AgentNotFoundError = {
 export const isAgentNotFoundError = (value: unknown): value is AgentNotFoundError =>
   typeof value === "object" && value !== null && "_tag" in value && value["_tag"] === "AgentNotFoundError"
 
-export type PluginOperationError = { readonly _tag: "PluginOperationError"; readonly message: string }
-export const isPluginOperationError = (value: unknown): value is PluginOperationError =>
-  typeof value === "object" && value !== null && "_tag" in value && value["_tag"] === "PluginOperationError"
-
 export type InvalidCursorError = { readonly _tag: "InvalidCursorError"; readonly message: string }
 export const isInvalidCursorError = (value: unknown): value is InvalidCursorError =>
   typeof value === "object" && value !== null && "_tag" in value && value["_tag"] === "InvalidCursorError"
@@ -2562,42 +2540,6 @@ export type PluginListOutput = {
   data: Array<PluginInfo>
 }
 
-export type PluginCheckInput = {
-  readonly location?: {
-    readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
-  }["location"]
-  readonly target: { readonly target: string }["target"]
-}
-
-export type PluginCheckOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
-  data: PluginPackageStatus
-}
-
-export type PluginUpdateInput = {
-  readonly location?: {
-    readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
-  }["location"]
-  readonly target: { readonly target: string }["target"]
-}
-
-export type PluginUpdateOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
-  data: Array<PluginInfo>
-}
-
-export type PluginReloadInput = {
-  readonly location?: {
-    readonly location?: { readonly directory?: string | undefined; readonly workspace?: string | undefined } | undefined
-  }["location"]
-  readonly target: { readonly target: string }["target"]
-}
-
-export type PluginReloadOutput = {
-  location: { directory: string; workspaceID?: string; project: { id: string; directory: string; canonical: string } }
-  data: Array<PluginInfo>
-}
-
 export type SessionListInput = {
   readonly workspace?: {
     readonly workspace?: string | undefined

packages/core/src/aisdk.ts

@@ -612,12 +612,12 @@ function streamLanguage(language: LanguageModelV3, options: LanguageModelV3CallO
     Stream.unwrap(
       Effect.tryPromise({
         try: () => language.doStream(options),
-        catch: llmError,
+        catch: (error) => llmError(error, "request"),
       }).pipe(
         Effect.map((result) =>
           Stream.fromReadableStream({
             evaluate: () => result.stream,
-            onError: llmError,
+            onError: (error) => llmError(error, "read"),
           }).pipe(
             Stream.mapEffect((event) => streamPartEvents(state, event)),
             Stream.flatMap((events) => Stream.fromIterable(events)),
@@ -744,7 +744,7 @@ function streamPartEvents(
         }),
       ])
     case "error":
-      return Effect.fail(llmError(event.error))
+      return Effect.fail(llmError(event.error, "read"))
   }
 }
 
@@ -794,9 +794,20 @@ function messageValue(input: unknown) {
   }
 }
 
-function llmError(error: unknown) {
+function llmError(error: unknown, operation: "request" | "read") {
   if (error instanceof AIError) return error
   if (APICallError.isInstance(error)) return apiCallError(error)
+  const network = networkFailure(error)
+  if (network)
+    return new AIError({
+      reason: new TransportError({
+        message: network.message.trim() === "" ? unknownErrorMessage(error) : network.message,
+        cause: error,
+        transport: "http",
+        operation,
+        code: network.code,
+      }),
+    })
   return new AIError({
     reason: new UnknownProviderError({
       message: unknownErrorMessage(error),
@@ -806,6 +817,50 @@ function llmError(error: unknown) {
   })
 }
 
+// Runtime-generated network failure shapes. The codes mirror the AI SDK's own
+// Bun network error list in handleFetchError; the messages are undici's fetch
+// TypeError and stream termination strings plus our SSE chunk timeout error.
+// Unrecognized shapes still retry via the UnknownProvider default; this match
+// only adds transport semantics (continuation eligibility, display).
+const NETWORK_ERROR_CODES = new Set([
+  "ECONNRESET",
+  "ECONNREFUSED",
+  "ETIMEDOUT",
+  "EPIPE",
+  "ConnectionRefused",
+  "ConnectionClosed",
+  "FailedToOpenSocket",
+])
+const NETWORK_ERROR_MESSAGES = new Set([
+  "fetch failed",
+  "failed to fetch",
+  "terminated",
+  "other side closed",
+  "sse read timed out",
+])
+
+const NativeErrorShape = Schema.Struct({
+  message: Schema.String,
+  code: Schema.optionalKey(Schema.String),
+  cause: Schema.optionalKey(Schema.Unknown),
+})
+const decodeNativeErrorShape = Schema.decodeUnknownOption(NativeErrorShape)
+
+function networkFailure(error: unknown, depth = 0): { message: string; code?: string } | undefined {
+  if (depth > 4) return undefined
+  const shape = Option.getOrUndefined(decodeNativeErrorShape(error))
+  if (!shape) return undefined
+  // Prefer the deepest match: wrappers like undici's "fetch failed" TypeError
+  // carry the specific network code on their cause.
+  const cause = networkFailure(shape.cause, depth + 1)
+  if (cause) return cause
+  if (shape.code !== undefined && (NETWORK_ERROR_CODES.has(shape.code) || shape.code.startsWith("UND_ERR")))
+    return { message: shape.message, code: shape.code }
+  if (NETWORK_ERROR_MESSAGES.has(shape.message.trim().toLowerCase()))
+    return { message: shape.message, code: shape.code }
+  return undefined
+}
+
 function apiCallError(error: APICallError) {
   const failure = RequestExecutor.httpFailure({
     message: providerErrorMessage(error),

packages/core/src/instance.ts

@@ -23,7 +23,6 @@ import { Mcp } from "./mcp/index.js"
 import { Permission } from "./permission.js"
 import { Plugin } from "./plugin.js"
 import { PluginHooks } from "./plugin/hooks.js"
-import { PluginExecution } from "./plugin/execution.js"
 import { InstancePlugins } from "./plugin/instance.js"
 import { PluginSupervisor } from "./plugin/supervisor.js"
 import { Worktree } from "./worktree.js"
@@ -68,7 +67,6 @@ const nodes = [
   AISDK.node,
   Plugin.node,
   PluginHooks.node,
-  PluginExecution.node,
   InstancePlugins.node,
   PluginSupervisor.node,
   Worktree.refreshNode,

packages/core/src/plugin.ts

@@ -1,5 +1,5 @@
 export * as Plugin from "./plugin.js"
-export { Event, ID, Info, Source, PackageStatus, OperationError } from "@opencode-ai/schema/plugin"
+export { Event, ID, Info, Source } from "@opencode-ai/schema/plugin"
 
 import { Plugin } from "@opencode-ai/schema/plugin"
 import type { Plugin as PluginDefinition } from "@opencode-ai/plugin/effect/plugin"
@@ -26,7 +26,6 @@ import { Vcs } from "./vcs.js"
 import { PluginHooks } from "./plugin/hooks.js"
 import { Generate } from "./generate.js"
 import { Permission } from "./permission.js"
-import { PluginExecution } from "./plugin/execution.js"
 
 export interface Interface {
   readonly activate: (
@@ -39,8 +38,6 @@ export interface Interface {
 export type Versioned = PluginDefinition & {
   readonly version: string
   readonly source?: Plugin.Source
-  readonly revision?: string
-  readonly generation?: string
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/Plugin") {}
@@ -50,12 +47,8 @@ const layer = Layer.effect(
   Effect.gen(function* () {
     const bus = yield* Bus.Service
     const kv = yield* KV.Service
-    const execution = yield* PluginExecution.Service
     const scope = yield* Scope.make()
-    const active = new Map<
-      Plugin.ID,
-      { readonly plugin: Versioned; readonly scope: Scope.Closeable; readonly error?: string }
-    >()
+    const active = new Map<Plugin.ID, { readonly plugin: Versioned; readonly scope: Scope.Closeable }>()
     const lock = Semaphore.makeUnsafe(1)
     let inventory: Plugin.Info[] = []
     let host: Parameters<PluginDefinition["effect"]>[0]
@@ -82,7 +75,7 @@ const layer = Layer.effect(
         "plugin.id": plugin.id,
         cause: loaded.cause,
       })
-      return { error: errorMessage(loaded.cause) } as const
+      return { error: Cause.pretty(loaded.cause) } as const
     })
 
     const activate = Effect.fn("Plugin.activate")(function* (
@@ -105,84 +98,55 @@ const layer = Layer.effect(
               return entry.plugin.id === definition?.id && entry.plugin.version === definition.version
             })
           ) {
-            const nextInventory = withFailures(
-              Array.from(active.values(), (entry) => activeInfo(entry.plugin, entry.error)),
-              failures,
-            )
+            const nextInventory = [...Array.from(active.values(), (entry) => activeInfo(entry.plugin)), ...failures]
             if (JSON.stringify(inventory) === JSON.stringify(nextInventory)) return
             inventory = nextInventory
             yield* bus.publish(Plugin.Event.Updated, {})
             return
           }
 
-          yield* execution.exclusive(
-            State.batch(
-              Effect.gen(function* () {
-                const nextInventory: Plugin.Info[] = []
-                // Registrations are append-ordered. Preserve the unchanged prefix, then rebuild the suffix.
-                const current = Array.from(active.values(), (entry) => entry.plugin)
-                const prefix = definitions.findIndex(
-                  (definition, index) =>
-                    definition.id !== current[index]?.id || definition.version !== current[index]?.version,
-                )
-                const keep = prefix === -1 ? definitions.length : prefix
-                const previousEntries = new Map(active)
-                const closing = Array.from(active.entries()).slice(keep).toReversed()
-                yield* Effect.forEach(
-                  closing,
-                  ([id, entry]) =>
-                    Effect.gen(function* () {
-                      yield* Scope.close(entry.scope, Exit.void).pipe(
-                        Effect.catchCause((cause) =>
-                          Effect.logWarning("failed to clean up plugin", { "plugin.id": id, cause }),
-                        ),
-                      )
-                      active.delete(id)
-                    }),
-                  { discard: true },
-                )
-                for (const [index, definition] of definitions.entries()) {
-                  if (index < keep) {
-                    nextInventory.push(activeInfo(definition, active.get(definition.id)?.error))
-                    continue
-                  }
-                  const previous = previousEntries.get(definition.id)
+          yield* State.batch(
+            Effect.gen(function* () {
+              const nextInventory: Plugin.Info[] = []
+              for (const definition of definitions) {
+                const previous = active.get(definition.id)
+                active.delete(definition.id)
+                if (previous) yield* Scope.close(previous.scope, Exit.void).pipe(Effect.ignore)
 
-                  const loaded = yield* load(definition)
-                  if (loaded.scope !== undefined) {
-                    active.set(definition.id, { plugin: definition, scope: loaded.scope })
-                    nextInventory.push(activeInfo(definition))
-                    continue
-                  }
-                  const failed: Plugin.Info = {
-                    id: definition.id,
-                    source: definition.source ?? { type: "builtin" },
-                    status: "failed",
-                    error: loaded.error,
-                    tui: definition.tui ?? false,
-                    ...(definition.revision === undefined ? {} : { revision: definition.revision }),
-                    ...(definition.generation === undefined ? {} : { generation: definition.generation }),
-                  }
-
-                  if (!previous) {
-                    nextInventory.push(failed)
-                    continue
-                  }
-                  const restored = yield* load(previous.plugin)
-                  if (restored.scope !== undefined) {
-                    active.set(definition.id, { plugin: previous.plugin, scope: restored.scope, error: loaded.error })
-                    nextInventory.push({ ...activeInfo(previous.plugin), error: loaded.error })
-                    continue
-                  }
-                  yield* Effect.logError("failed to restore plugin; deactivating", {
-                    "plugin.id": definition.id,
-                  })
-                  nextInventory.push(failed)
+                const loaded = yield* load(definition)
+                if (loaded.scope !== undefined) {
+                  active.set(definition.id, { plugin: definition, scope: loaded.scope })
+                  nextInventory.push(activeInfo(definition))
+                  continue
                 }
+                nextInventory.push({
+                  id: definition.id,
+                  source: definition.source ?? { type: "builtin" },
+                  status: "failed",
+                  error: loaded.error,
+                  tui: definition.tui ?? false,
+                })
 
-                inventory = withFailures(nextInventory, failures)
-              }),
-            ).pipe(Effect.uninterruptible),
+                if (!previous) continue
+                const restored = yield* load(previous.plugin)
+                if (restored.scope !== undefined) {
+                  active.set(definition.id, { plugin: previous.plugin, scope: restored.scope })
+                  continue
+                }
+                yield* Effect.logError("failed to restore plugin; deactivating", {
+                  "plugin.id": definition.id,
+                })
+              }
+
+              const removed = Array.from(active.entries())
+                .filter(([id]) => !ids.has(id))
+                .toReversed()
+              removed.forEach(([id]) => active.delete(id))
+              yield* Effect.forEach(removed, ([, entry]) => Scope.close(entry.scope, Exit.void).pipe(Effect.ignore), {
+                discard: true,
+              })
+              inventory = [...nextInventory, ...failures]
+            }),
           )
           yield* bus.publish(Plugin.Event.Updated, {})
         }),
@@ -207,41 +171,15 @@ const layer = Layer.effect(
   }),
 )
 
-function activeInfo(plugin: Versioned, error?: string): Plugin.Info {
+function activeInfo(plugin: Versioned): Plugin.Info {
   return {
     id: Plugin.ID.make(plugin.id),
     source: plugin.source ?? { type: "builtin" },
     status: "active",
     tui: plugin.tui ?? false,
-    ...(plugin.revision === undefined ? {} : { revision: plugin.revision }),
-    ...(plugin.generation === undefined ? {} : { generation: plugin.generation }),
-    ...(error === undefined ? {} : { error }),
   }
 }
 
-/** Inventory errors must not expose credentials or unbounded import/setup traces. */
-export function errorMessage(cause: Cause.Cause<unknown>) {
-  return Cause.pretty(cause)
-    .replace(/https?:\/\/[^\s"'<>]+/g, (value) => {
-      if (!URL.canParse(value)) return "[URL]"
-      const url = new URL(value)
-      url.username = ""
-      url.password = ""
-      url.search = ""
-      url.hash = ""
-      return url.href
-    })
-    .slice(0, 2000)
-}
-
-function withFailures(active: Plugin.Info[], failures: readonly Extract<Plugin.Info, { readonly status: "failed" }>[]) {
-  return failures.reduce((inventory, failure) => {
-    const index = inventory.findIndex((entry) => JSON.stringify(entry.source) === JSON.stringify(failure.source))
-    if (index === -1) return [...inventory, failure]
-    return inventory.map((entry, current) => (current === index ? { ...entry, error: failure.error } : entry))
-  }, active)
-}
-
 export const node = makeLocationNode({
   service: Service,
   layer,
@@ -265,6 +203,5 @@ export const node = makeLocationNode({
     WebSearch.node,
     Generate.node,
     Permission.node,
-    PluginExecution.node,
   ],
 })

packages/core/src/plugin/execution.ts

@@ -1,74 +0,0 @@
-export * as PluginExecution from "./execution.js"
-
-import { Context, Effect, Latch, Layer, Semaphore } from "effect"
-import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
-
-export interface Interface {
-  readonly lease: <A, E, R>(
-    session: { readonly id: string; readonly parentID?: string; readonly admission?: boolean },
-    effect: Effect.Effect<A, E, R>,
-  ) => Effect.Effect<A, E, R>
-  readonly exclusive: <A, E, R>(effect: Effect.Effect<A, E, R>) => Effect.Effect<A, E, R>
-}
-
-export class Service extends Context.Service<Service, Interface>()("@opencode/PluginExecution") {}
-
-export const layer = Layer.effect(
-  Service,
-  Effect.gen(function* () {
-    const admission = yield* Latch.make(true)
-    const idle = yield* Latch.make(true)
-    const mutations = yield* Semaphore.make(1)
-    const readers = new Map<string, number>()
-    let leases = 0
-
-    const acquire = (session: {
-      readonly id: string
-      readonly parentID?: string
-      readonly admission?: boolean
-    }): Effect.Effect<void> =>
-      Effect.suspend(() => {
-        // Child execution must finish the parent's tool call even while activation waits.
-        if (
-          !admission.isOpen() &&
-          !readers.has(session.id) &&
-          !(session.parentID && readers.has(session.parentID)) &&
-          !(session.admission && leases > 0)
-        )
-          return Effect.interruptible(admission.await).pipe(Effect.andThen(acquire(session)))
-        // Admission protects callbacks but does not establish Session execution ownership.
-        if (!session.admission) readers.set(session.id, (readers.get(session.id) ?? 0) + 1)
-        leases++
-        return idle.close
-      })
-
-    return Service.of({
-      lease: (session, effect) =>
-        Effect.acquireUseRelease(
-          acquire(session),
-          () => effect,
-          () =>
-            Effect.suspend(() => {
-              leases--
-              if (!session.admission) {
-                const count = (readers.get(session.id) ?? 1) - 1
-                if (count === 0) readers.delete(session.id)
-                else readers.set(session.id, count)
-              }
-              return leases === 0 ? idle.open : Effect.void
-            }),
-        ),
-      exclusive: (effect) =>
-        mutations.withPermit(
-          Effect.uninterruptibleMask((restore) =>
-            admission.close.pipe(
-              Effect.andThen(restore(idle.await).pipe(Effect.andThen(restore(effect)))),
-              Effect.ensuring(admission.open),
-            ),
-          ),
-        ),
-    })
-  }),
-)
-
-export const node = makeLocationNode({ service: Service, layer, deps: [] })

packages/core/src/plugin/host.ts

@@ -4,7 +4,6 @@ import { Plugin } from "@opencode-ai/plugin/effect"
 import type { IntegrationMethodRegistration } from "@opencode-ai/plugin/effect/integration"
 import { EventManifest } from "@opencode-ai/schema/event-manifest"
 import { ServerConfig } from "@opencode-ai/schema/mcp"
-import { OperationError } from "@opencode-ai/schema/plugin"
 import { App } from "../app.js"
 import { Effect, Schema, Stream } from "effect"
 import { Agent } from "../agent.js"
@@ -328,10 +327,6 @@ export const make = Effect.fn("PluginHost.make")(function* (plugin: Interface, p
     },
     plugin: {
       list: () => response(plugin.list()),
-      // In-process management can wait on its own setup/tool lease. Use an external client instead.
-      check: () => Effect.fail(new OperationError({ message: "Check plugin updates through an external client." })),
-      update: () => Effect.fail(new OperationError({ message: "Update plugins through an external client." })),
-      reload: () => Effect.fail(new OperationError({ message: "Reload plugins through an external client." })),
     },
     reference: {
       list: () => response(reference.list()),

packages/core/src/plugin/module.ts

@@ -36,22 +36,15 @@ const Definition = Schema.Struct({
 
 export const load = Effect.fn("PluginModule.load")(function* (
   operation: Extract<ConfigPluginSource.Operation, { type: "add" }>,
-  fresh?: Npm.EntryPoint,
 ) {
   const npm = yield* Npm.Service
-  const resolved =
-    fresh ??
-    (path.isAbsolute(operation.target)
-      ? { entrypoint: pathToFileURL(operation.target).href, revision: undefined, generation: undefined }
-      : yield* npm.add(operation.target, { subpaths: ["server", ""], refresh: true }))
-  const entrypoint = resolved.entrypoint
+  const entrypoint = path.isAbsolute(operation.target)
+    ? pathToFileURL(operation.target).href
+    : (yield* npm.add(operation.target, { subpaths: ["server", ""], refresh: true })).entrypoint
   if (!entrypoint) return yield* Effect.fail(new Error(`Plugin entrypoint not found: ${operation.target}`))
   // Bun currently ignores query parameters when caching file:// imports.
-  const target =
-    typeof Bun !== "undefined" && path.isAbsolute(operation.target)
-      ? operation.target.replaceAll("\\", "/")
-      : entrypoint
-  const source = fresh || operation.mtime === undefined ? entrypoint : `${target}?mtime=${operation.mtime}`
+  const target = typeof Bun !== "undefined" ? operation.target.replaceAll("\\", "/") : entrypoint
+  const source = operation.mtime === undefined ? entrypoint : `${target}?mtime=${operation.mtime}`
   yield* Effect.log({ msg: "loading plugin", id: operation.target, entrypoint: source })
   const mod = yield* Effect.promise(() => importModule(source))
   const value = (yield* Schema.decodeUnknownEffect(Definition)(mod)).default
@@ -60,9 +53,7 @@ export const load = Effect.fn("PluginModule.load")(function* (
     id: plugin.id,
     tui: plugin.tui,
     vcs: plugin.vcs,
-    version: JSON.stringify([operation, resolved.generation]),
-    revision: resolved.revision,
-    generation: resolved.generation,
+    version: JSON.stringify(operation),
     source: path.isAbsolute(operation.target)
       ? { type: "local" as const, path: operation.target }
       : { type: "package" as const, package: operation.target },

packages/core/src/plugin/supervisor-service.ts

@@ -1,7 +1,6 @@
 export * as PluginSupervisor from "./supervisor-service.js"
 
 import { Context, Effect } from "effect"
-import type { Plugin } from "@opencode-ai/schema/plugin"
 
 /**
  * Dependency-only supervisor seam. Keep this module free of implementation
@@ -10,11 +9,6 @@ import type { Plugin } from "@opencode-ai/schema/plugin"
 export interface Interface {
   /** Wait for the initial plugin generation and startup updates to settle. */
   readonly flush: Effect.Effect<void>
-  /** Initial reconciliation barrier; it never closes again after startup settles. */
-  readonly initialized: Effect.Effect<void>
-  readonly check: (target: string) => Effect.Effect<Plugin.PackageStatus, Plugin.OperationError>
-  readonly update: (target: string) => Effect.Effect<Plugin.Info[], Plugin.OperationError>
-  readonly reload: (target: string) => Effect.Effect<Plugin.Info[], Plugin.OperationError>
 }
 
 export class Service extends Context.Service<Service, Interface>()("@opencode/PluginSupervisor") {}

packages/core/src/plugin/supervisor.ts

@@ -2,10 +2,8 @@ export * as PluginSupervisor from "./supervisor.js"
 export { Service, type Interface } from "./supervisor-service.js"
 
 import { Event } from "@opencode-ai/schema/config"
-import { Cause, Effect, Latch, Layer, Option, Scope, Semaphore, Stream } from "effect"
+import { Cause, Effect, Latch, Layer, Stream } from "effect"
 import path from "path"
-import { randomUUID } from "node:crypto"
-import { pathToFileURL } from "node:url"
 import { ConfigPluginSource } from "../config/plugin/source.js"
 import { makeLocationNode } from "@opencode-ai/util/effect/app-node"
 import { Bus } from "../bus.js"
@@ -17,13 +15,10 @@ import { PluginModule } from "./module.js"
 import { SdkPlugins } from "./sdk.js"
 import { Service } from "./supervisor-service.js"
 
-type Cached = { readonly operation: string; readonly plugin: Plugin.Versioned; readonly error?: string }
-
 const resolve = Effect.fn("PluginSupervisor.resolve")(function* (
   pre: readonly Plugin.Versioned[],
   post: readonly Plugin.Versioned[],
   operations: readonly ConfigPluginSource.Operation[],
-  cache: Map<string, Cached>,
 ) {
   const matches = (selector: string, target: string) =>
     selector === "*" || (selector.endsWith(".*") ? target.startsWith(selector.slice(0, -1)) : selector === target)
@@ -31,7 +26,6 @@ const resolve = Effect.fn("PluginSupervisor.resolve")(function* (
   const enabled = new Set(definitions.map((plugin) => plugin.id))
   const packages = new Map<string, Plugin.Versioned>()
   const failures = new Map<string, Extract<Plugin.Info, { readonly status: "failed" }>>()
-  const previousSources = new Map(cache)
   const plugins = () => [...definitions, ...packages.values()]
 
   for (const operation of operations) {
@@ -54,23 +48,13 @@ const resolve = Effect.fn("PluginSupervisor.resolve")(function* (
       continue
     }
 
-    const cached = previousSources.get(operation.target)
-    const key = JSON.stringify(operation)
-    const plugin =
-      cached?.operation === key
-        ? cached.plugin
-        : yield* PluginModule.load(operation).pipe(
-            Effect.flatMap((plugin) =>
-              cached && plugin.id !== cached.plugin.id
-                ? Effect.fail(new Error(`Plugin ID changed from ${cached.plugin.id} to ${plugin.id}`))
-                : Effect.succeed(plugin),
-            ),
-            Effect.catchCause((cause) =>
-              Effect.logWarning("failed to load plugin", { target: operation.target, cause }).pipe(
-                Effect.as({ error: Plugin.errorMessage(cause) }),
-              ),
-            ),
-          )
+    const plugin = yield* PluginModule.load(operation).pipe(
+      Effect.catchCause((cause) =>
+        Effect.logWarning("failed to load plugin", { target: operation.target, cause }).pipe(
+          Effect.as({ error: Cause.pretty(cause) }),
+        ),
+      ),
+    )
     if ("error" in plugin) {
       failures.set(operation.target, {
         source: pluginSource(operation.target),
@@ -78,24 +62,9 @@ const resolve = Effect.fn("PluginSupervisor.resolve")(function* (
         error: plugin.error,
         tui: false,
       })
-      if (cached) {
-        cache.set(operation.target, { ...cached, operation: key, error: plugin.error })
-        packages.set(operation.target, cached.plugin)
-        enabled.add(cached.plugin.id)
-      }
       continue
     }
-    if (cached?.operation === key && cached.error) {
-      failures.set(operation.target, {
-        source: pluginSource(operation.target),
-        status: "failed",
-        error: cached.error,
-        tui: plugin.tui ?? false,
-      })
-    } else {
-      failures.delete(operation.target)
-      cache.set(operation.target, { operation: key, plugin })
-    }
+    failures.delete(operation.target)
     const previous = packages.get(operation.target)
     if (previous) enabled.delete(previous.id)
     packages.set(operation.target, plugin)
@@ -108,12 +77,7 @@ const resolve = Effect.fn("PluginSupervisor.resolve")(function* (
       ...[...packages.values()].filter((plugin) => enabled.has(plugin.id)),
       ...post.filter((plugin) => enabled.has(plugin.id)),
     ],
-    failures: [...failures.entries()]
-      .filter(([target]) => {
-        const plugin = packages.get(target)
-        return !plugin || enabled.has(plugin.id)
-      })
-      .map(([, failure]) => failure),
+    failures: [...failures.values()],
   }
 })
 
@@ -125,20 +89,12 @@ export const layer = Layer.effect(
     const instance = yield* InstancePlugins.Service
     const sources = yield* ConfigPluginSource.Service
     const bus = yield* Bus.Service
-    const npm = yield* Npm.Service
-    const scope = yield* Scope.Scope
     const ready = yield* Latch.make()
-    const initialized = yield* Latch.make()
-    const mutations = yield* Semaphore.make(1)
-    const cache = new Map<string, Cached>()
-    // Internal definitions capture stable Location services; SDK contributions remain dynamic.
-    const internal = yield* PluginInternal.list()
     let observed = 0
 
-    const activate = Effect.fn("PluginSupervisor.activate")(function* (
-      operations: readonly ConfigPluginSource.Operation[],
-      previous: ReadonlyMap<string, Cached> = new Map(cache),
-    ) {
+    const activate = Effect.fn("PluginSupervisor.activate")(function* () {
+      // Resolve OpenCode's internal plugins with their privileged Location services.
+      const internal = yield* PluginInternal.list()
       // Combine internal plugins with host-contributed plugins in boot order.
       // Instance-bound plugins come last: later activation can override earlier
       // container writes, so the instance's explicit choices win over globals.
@@ -152,117 +108,12 @@ export const layer = Layer.effect(
         version: "internal",
         source: { type: "builtin" as const },
       }))
+      const operations = yield* sources.operations()
       // Apply config operations and load enabled package plugins into one ordered generation.
-      const resolved = yield* resolve(pre, post, operations, cache).pipe(Effect.provideService(Npm.Service, npm))
+      const resolved = yield* resolve(pre, post, operations)
       // Replace the active generation in one scoped, batched activation.
-      const activated = yield* registry.activate(resolved.plugins, resolved.failures).pipe(Effect.exit)
-      if (activated._tag === "Failure") {
-        cache.clear()
-        previous.forEach((entry, target) => cache.set(target, entry))
-        return yield* Effect.failCause(activated.cause)
-      }
-      const inventory = yield* registry.list()
-      for (const [target, entry] of cache) {
-        if (!operations.some((operation) => operation.type === "add" && operation.target === target)) {
-          cache.delete(target)
-          continue
-        }
-        const active = inventory.find((item) =>
-          item.source.type === "local"
-            ? item.source.path === target
-            : item.source.type === "package" && item.source.package === target,
-        )
-        if (active?.status !== "active" || !active.error) continue
-        const old = previous.get(target)
-        if (old) cache.set(target, { ...old, operation: entry.operation, error: active.error })
-      }
-      return inventory
+      yield* registry.activate(resolved.plugins, resolved.failures)
     })
-
-    const operation = Effect.fnUntraced(function* (target: string) {
-      const operations = yield* sources.operations().pipe(Effect.provideService(Scope.Scope, scope))
-      const entry = operations.findLast((entry) => entry.type === "add" && entry.target === target)
-      const inventory = yield* registry.list()
-      if (
-        !entry ||
-        entry.type !== "add" ||
-        target === "*" ||
-        target.endsWith(".*") ||
-        target.startsWith("opencode.") ||
-        (!cache.has(target) &&
-          !inventory.some((item) =>
-            item.source.type === "local"
-              ? item.source.path === target
-              : item.source.type === "package" && item.source.package === target,
-          ))
-      )
-        return yield* new Plugin.OperationError({ message: `Not a configured plugin source: ${target}` })
-      return { entry, operations }
-    })
-
-    const mutate = (target: string, action: "update" | "reload") =>
-      initialized.await.pipe(
-        Effect.andThen(
-          mutations.withPermit(
-            Effect.gen(function* () {
-              const selected = yield* operation(target)
-              if (action === "update") {
-                if (path.isAbsolute(target) || !(yield* npm.inspect(target)).mutable)
-                  return yield* new Plugin.OperationError({ message: `Plugin source cannot be updated: ${target}` })
-              }
-              const previous = new Map(cache)
-              const generation = randomUUID()
-              const staged = path.isAbsolute(target)
-                ? {
-                    directory: path.dirname(target),
-                    generation,
-                    entrypoint: `${typeof Bun !== "undefined" ? target.replaceAll("\\", "/") : pathToFileURL(target).href}?reload=${generation}`,
-                  }
-                : yield* action === "update"
-                    ? npm.update(target, { subpaths: ["server", ""] })
-                    : npm.reload(target, {
-                        subpaths: ["server", ""],
-                        revision: cache.get(target)?.plugin.revision,
-                        generation: cache.get(target)?.plugin.generation,
-                      })
-              const loaded = yield* PluginModule.load(selected.entry, staged).pipe(
-                Effect.provideService(Npm.Service, npm),
-                Effect.exit,
-              )
-              if (loaded._tag === "Failure") {
-                const old = cache.get(target)
-                if (!old) return yield* Effect.failCause(loaded.cause)
-                cache.set(target, {
-                  ...old,
-                  operation: JSON.stringify(selected.entry),
-                  error: Plugin.errorMessage(loaded.cause),
-                })
-                return yield* activate(selected.operations, previous)
-              }
-              const old = cache.get(target)
-              if (old && loaded.value.id !== old.plugin.id) {
-                cache.set(target, {
-                  ...old,
-                  operation: JSON.stringify(selected.entry),
-                  error: `Plugin ID changed from ${old.plugin.id} to ${loaded.value.id}`,
-                })
-                return yield* activate(selected.operations, previous)
-              }
-              cache.set(target, { operation: JSON.stringify(selected.entry), plugin: loaded.value })
-              return yield* activate(selected.operations, previous)
-            }),
-          ),
-        ),
-        Effect.catchCause((cause) => {
-          if (Cause.hasInterruptsOnly(cause)) return Effect.interrupt
-          const error = Option.getOrUndefined(Cause.findErrorOption(cause))
-          return Effect.fail(
-            error instanceof Plugin.OperationError
-              ? error
-              : new Plugin.OperationError({ message: `Unable to ${action} plugin source.` }),
-          )
-        }),
-      )
     const updates = Stream.merge(sources.changes(), bus.subscribe([Event.Updated, SdkPlugins.Updated])).pipe(
       // Make accepted work visible to flush before coalescing the burst.
       Stream.mapEffect(() =>
@@ -279,48 +130,13 @@ export const layer = Layer.effect(
       Stream.debounce("100 millis"),
       Stream.runForEach((target) =>
         Effect.gen(function* () {
-          yield* mutations
-            .withPermit(
-              Effect.gen(function* () {
-                return yield* activate(yield* sources.operations().pipe(Effect.provideService(Scope.Scope, scope)))
-              }),
-            )
-            .pipe(Effect.catchCause((cause) => Effect.logError("failed to reload plugins", { cause })))
-          if (observed === target) {
-            yield* initialized.open
-            yield* ready.open
-          }
+          yield* activate().pipe(Effect.catchCause((cause) => Effect.logError("failed to reload plugins", { cause })))
+          if (observed === target) yield* ready.open
         }),
       ),
       Effect.forkScoped({ startImmediately: true }),
     )
-    return Service.of({
-      flush: ready.await,
-      initialized: initialized.await,
-      check: (target) =>
-        initialized.await.pipe(
-          Effect.andThen(
-            mutations.withPermit(
-              Effect.gen(function* () {
-                yield* operation(target)
-                if (path.isAbsolute(target)) return { mutable: false }
-                return yield* npm.check(target)
-              }),
-            ),
-          ),
-          Effect.catchCause((cause) => {
-            if (Cause.hasInterruptsOnly(cause)) return Effect.interrupt
-            const error = Option.getOrUndefined(Cause.findErrorOption(cause))
-            return Effect.fail(
-              error instanceof Plugin.OperationError
-                ? error
-                : new Plugin.OperationError({ message: "Unable to check plugin source." }),
-            )
-          }),
-        ),
-      update: (target) => mutate(target, "update"),
-      reload: (target) => mutate(target, "reload"),
-    })
+    return Service.of({ flush: ready.await })
   }),
 )
 

packages/core/src/session.ts

@@ -41,7 +41,6 @@ import { Session } from "@opencode-ai/schema/session"
 import { FSUtil } from "@opencode-ai/util/fs-util"
 import { Image } from "./image.js"
 import { PluginSupervisor } from "./plugin/supervisor-service.js"
-import { PluginExecution } from "./plugin/execution.js"
 import { PluginHooks } from "./plugin/hooks.js"
 import { Mime } from "./mime.js"
 import type { EventLog } from "@opencode-ai/schema/event-log"
@@ -691,39 +690,30 @@ const layer = Layer.effect(
       ),
       generate: Effect.fn("Session.generate")(function* (input) {
         const session = yield* result.get(input.sessionID)
-        return yield* Effect.gen(function* () {
-          const plugins = yield* PluginSupervisor.Service
-          yield* plugins.initialized
-          const gate = yield* PluginExecution.Service
-          const generate = yield* SessionGenerate.Service
-          return yield* gate.lease({ id: session.id, admission: true }, generate.generate(input))
-        }).pipe(Effect.provide(locations.get(session.location)))
+        const generate = yield* SessionGenerate.Service.pipe(Effect.provide(locations.get(session.location)))
+        return yield* generate.generate(input)
       }),
       command: Effect.fn("Session.command")(function* (input) {
         const session = yield* result.get(input.sessionID)
-        yield* Effect.gen(function* () {
+        const commands = yield* Effect.gen(function* () {
           const plugins = yield* PluginSupervisor.Service
-          yield* plugins.initialized
-          const gate = yield* PluginExecution.Service
-          const commands = yield* Command.Service
-          // Commands may await child Sessions, so they retain ownership that lets those children drain.
-          return yield* gate.lease(
-            session,
-            commands.execute({
-              name: input.command,
-              invocation: {
-                sessionID: input.sessionID,
-                prompt: {
-                  text: input.text,
-                  files: input.files,
-                  agents: input.agents,
-                  skills: input.skills,
-                },
-                delivery: input.delivery ?? "steer",
-              },
-            }),
-          )
+          yield* plugins.flush
+          return yield* Command.Service
         }).pipe(Effect.provide(locations.get(session.location)))
+        const delivery = input.delivery ?? "steer"
+        yield* commands.execute({
+          name: input.command,
+          invocation: {
+            sessionID: input.sessionID,
+            prompt: {
+              text: input.text,
+              files: input.files,
+              agents: input.agents,
+              skills: input.skills,
+            },
+            delivery,
+          },
+        })
       }),
       shell: Effect.fn("Session.shell")(function* (input) {
         const session = yield* result.get(input.sessionID)
@@ -733,20 +723,16 @@ const layer = Layer.effect(
             yield* execution.awaitIdle(input.sessionID)
             const started = yield* Effect.gen(function* () {
               const plugins = yield* PluginSupervisor.Service
-              yield* plugins.initialized
-              const gate = yield* PluginExecution.Service
+              yield* plugins.flush
               const shell = yield* Shell.Service
-              return yield* gate.lease(
-                { id: input.sessionID, admission: true },
-                shell
-                  .create({
-                    command: input.command,
-                    cwd: session.location.directory,
-                    timeout: 0,
-                    metadata: { sessionID: input.sessionID },
-                  })
-                  .pipe(Effect.orDie),
-              )
+              return yield* shell
+                .create({
+                  command: input.command,
+                  cwd: session.location.directory,
+                  timeout: 0,
+                  metadata: { sessionID: input.sessionID },
+                })
+                .pipe(Effect.orDie)
             }).pipe(Effect.provide(locations.get(session.location)))
             yield* bus.publish(
               SessionEvent.Shell.Started,
@@ -978,14 +964,10 @@ const layer = Layer.effect(
             return yield* new BusyError({ sessionID: input.sessionID })
           return yield* Effect.gen(function* () {
             const plugins = yield* PluginSupervisor.Service
-            yield* plugins.initialized
-            const gate = yield* PluginExecution.Service
-            return yield* gate.lease(
-              { id: session.id, admission: true },
-              SessionRevert.stage({ session, messageID: input.messageID, files: input.files }).pipe(
-                Effect.provideService(Database.Service, database),
-                Effect.provideService(Bus.Service, bus),
-              ),
+            yield* plugins.flush
+            return yield* SessionRevert.stage({ session, messageID: input.messageID, files: input.files }).pipe(
+              Effect.provideService(Database.Service, database),
+              Effect.provideService(Bus.Service, bus),
             )
           }).pipe(Effect.provide(locations.get(session.location)))
         }),
@@ -994,12 +976,8 @@ const layer = Layer.effect(
           if ((yield* execution.active).has(sessionID)) return yield* new BusyError({ sessionID })
           const revert = yield* Effect.gen(function* () {
             const plugins = yield* PluginSupervisor.Service
-            yield* plugins.initialized
-            const gate = yield* PluginExecution.Service
-            return yield* gate.lease(
-              { id: session.id, admission: true },
-              SessionRevert.clear(session).pipe(Effect.provideService(Bus.Service, bus)),
-            )
+            yield* plugins.flush
+            return yield* SessionRevert.clear(session).pipe(Effect.provideService(Bus.Service, bus))
           }).pipe(Effect.provide(locations.get(session.location)))
           yield* execution.wake(sessionID)
           return revert
@@ -1041,65 +1019,59 @@ const preparePrompt = Effect.fn("Session.preparePrompt")(function* (
   messageID: SessionMessage.ID,
 ) {
   const plugins = yield* PluginSupervisor.Service
-  yield* plugins.initialized
-  const gate = yield* PluginExecution.Service
-  return yield* gate.lease(
-    { id: request.sessionID, admission: true },
-    Effect.gen(function* () {
-      const hooks = yield* PluginHooks.Service
-      const event = yield* hooks.trigger("session", "prompt", {
-        sessionID: request.sessionID,
-        messageID,
-        prompt: structuredClone({
-          text: request.text,
-          files: request.files?.slice(),
-          agents: request.agents?.slice(),
-          skills: request.skills?.slice(),
-        }),
-        metadata: structuredClone(request.metadata),
-        delivery: request.delivery ?? "steer",
-      })
-      const input = event.prompt
-      const fs = yield* FSUtil.Service
-      const files = input.files
-        ? yield* Effect.forEach(input.files, (file) => materializeAttachment(fs, file), { concurrency: 8 })
-        : undefined
-      const requested = input.skills
-      const selected = yield* Effect.gen(function* () {
-        if (!requested?.length) return undefined
-        const skillService = yield* Skill.Service
-        const prepared = new Map<Skill.ID, Skill.Name>()
-        return yield* Effect.forEach(requested, (attachment) =>
-          Effect.gen(function* () {
-            const name = prepared.get(attachment.id)
-            if (name !== undefined) return { id: attachment.id, name, mention: attachment.mention }
-            const skill = yield* skillService.get(attachment.id)
-            if (!skill) return yield* new SkillNotFoundError({ skill: attachment.id })
-            prepared.set(skill.id, skill.name)
-            return {
-              id: skill.id,
-              name: skill.name,
-              text: (yield* Skill.prepare(fs, skill).pipe(Effect.orDie)).output,
-              mention: attachment.mention,
-            }
-          }),
-        )
-      })
-      return SessionInbox.Item.make({
-        type: "user",
-        payload: {
-          ...Prompt.make({
-            text: input.text,
-            agents: input.agents,
-            files,
-            skills: selected?.length ? selected : undefined,
-          }),
-          metadata: event.metadata,
-        },
-        delivery: event.delivery,
-      })
+  yield* plugins.flush
+  const hooks = yield* PluginHooks.Service
+  const event = yield* hooks.trigger("session", "prompt", {
+    sessionID: request.sessionID,
+    messageID,
+    prompt: structuredClone({
+      text: request.text,
+      files: request.files?.slice(),
+      agents: request.agents?.slice(),
+      skills: request.skills?.slice(),
     }),
-  )
+    metadata: structuredClone(request.metadata),
+    delivery: request.delivery ?? "steer",
+  })
+  const input = event.prompt
+  const fs = yield* FSUtil.Service
+  const files = input.files
+    ? yield* Effect.forEach(input.files, (file) => materializeAttachment(fs, file), { concurrency: 8 })
+    : undefined
+  const requested = input.skills
+  const selected = yield* Effect.gen(function* () {
+    if (!requested?.length) return undefined
+    const skillService = yield* Skill.Service
+    const prepared = new Map<Skill.ID, Skill.Name>()
+    return yield* Effect.forEach(requested, (attachment) =>
+      Effect.gen(function* () {
+        const name = prepared.get(attachment.id)
+        if (name !== undefined) return { id: attachment.id, name, mention: attachment.mention }
+        const skill = yield* skillService.get(attachment.id)
+        if (!skill) return yield* new SkillNotFoundError({ skill: attachment.id })
+        prepared.set(skill.id, skill.name)
+        return {
+          id: skill.id,
+          name: skill.name,
+          text: (yield* Skill.prepare(fs, skill).pipe(Effect.orDie)).output,
+          mention: attachment.mention,
+        }
+      }),
+    )
+  })
+  return SessionInbox.Item.make({
+    type: "user",
+    payload: {
+      ...Prompt.make({
+        text: input.text,
+        agents: input.agents,
+        files,
+        skills: selected?.length ? selected : undefined,
+      }),
+      metadata: event.metadata,
+    },
+    delivery: event.delivery,
+  })
 })
 
 const MAX_ATTACHMENT_BYTES = 20 * 1024 * 1024

packages/core/src/session/context.ts

@@ -125,7 +125,7 @@ const layer = Layer.effect(
       if (session.location.directory !== location.directory || session.location.workspaceID !== location.workspaceID)
         return yield* Effect.interrupt
 
-      yield* plugins.initialized
+      yield* plugins.flush
       yield* mcpTools.flush
       const agent = yield* agents.select(session.agent)
       if (!agent.info) return yield* new AgentNotFoundError({ sessionID: session.id, agent: session.agent ?? agent.id })

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

@@ -26,7 +26,6 @@ import { ToolOutput } from "../../tool-output.js"
 import { PluginSupervisor } from "../../plugin/supervisor.js"
 import { PromptCacheDiagnostics } from "../prompt-cache-diagnostics.js"
 import { MAX_STEPS_PROMPT } from "./max-steps.js"
-import { PluginExecution } from "../../plugin/execution.js"
 
 const CONTINUE_AFTER_INCOMPLETE_STREAM =
   "The previous response was interrupted. Continue from where you left off without repeating completed content."
@@ -41,7 +40,6 @@ const layer = Layer.effect(
     const db = (yield* Database.Service).db
     const compaction = yield* SessionCompaction.Service
     const plugins = yield* PluginSupervisor.Service
-    const pluginExecution = yield* PluginExecution.Service
     const title = yield* SessionTitle.Service
     const steps = yield* SessionStep.make
     const diagnostics = yield* Config.boolean("OPENCODE_PROMPT_CACHE_DIAGNOSTICS").pipe(
@@ -91,6 +89,7 @@ const layer = Layer.effect(
         const control = pending.type === "compaction" || pending.type === "move"
         if (promotable === "steer" && pending.delivery === "queue" && !control) return DrainResult.Complete()
       }
+      yield* plugins.flush
       yield* settleStaleToolCalls(sessionID)
 
       const advanceToStep = Effect.fn("SessionRunner.advanceToStep")(() =>
@@ -314,14 +313,7 @@ const layer = Layer.effect(
       }
     })
 
-    return Service.of({
-      drain: Effect.fnUntraced(function* (input) {
-        yield* plugins.initialized
-        const session = yield* store.get(input.sessionID)
-        if (!session) return yield* Effect.die(new Error(`Session not found: ${input.sessionID}`))
-        return yield* pluginExecution.lease(session, drain(input))
-      }),
-    })
+    return Service.of({ drain })
   }),
 )
 
@@ -340,6 +332,5 @@ export const node = makeLocationNode({
     Snapshot.node,
     ToolOutput.node,
     Database.node,
-    PluginExecution.node,
   ],
 })

packages/core/src/session/runner/publish-llm-event.ts

@@ -396,7 +396,7 @@ export const createLLMEventPublisher = (bus: Pick<Bus.Interface, "publish">, inp
         yield* text.append(event.id, event.text, providerState(event.providerMetadata))
         return
       case "text-end":
-        yield* text.end(event.id, providerState(event.providerMetadata))
+        yield* text.end(event.id, providerState(event.providerMetadata), event.text)
         return
       case "reasoning-start":
         outputStarted = true
@@ -412,7 +412,7 @@ export const createLLMEventPublisher = (bus: Pick<Bus.Interface, "publish">, inp
         yield* reasoning.append(event.id, event.text, providerState(event.providerMetadata))
         return
       case "reasoning-end":
-        yield* reasoning.end(event.id, providerState(event.providerMetadata))
+        yield* reasoning.end(event.id, providerState(event.providerMetadata), event.text)
         return
       case "tool-input-start":
         outputStarted = true

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

@@ -26,12 +26,16 @@ export function isRetryable(error: AIError) {
       return error.reason.delivery === undefined || error.reason.delivery === "not-sent"
     case "InvalidProviderOutput":
       return error.reason.classification === "incomplete-stream"
+    // Unrecognized failures retry: classification records affirmative
+    // deterministic evidence, and transient failures are exactly the ones
+    // that arrive in shapes no classifier anticipates.
+    case "UnknownProvider":
+      return true
     case "Authentication":
     case "QuotaExceeded":
     case "ContentPolicy":
     case "InvalidRequest":
     case "NoRoute":
-    case "UnknownProvider":
       return false
     default: {
       const exhaustive: never = error.reason

packages/core/src/session/title.ts

@@ -17,7 +17,6 @@ import type { SessionRunnerModel } from "./runner/model.js"
 import { SessionSchema } from "./schema.js"
 import { SessionUsage } from "./usage.js"
 import { SessionStore } from "./store.js"
-import { PluginExecution } from "../plugin/execution.js"
 
 const MAX_LENGTH = 100
 const MAX_CONTEXT_LENGTH = 8_000
@@ -166,14 +165,9 @@ export const layer = Layer.effect(
     const context = yield* SessionContext.Service
     const store = yield* SessionStore.Service
     const database = yield* Database.Service
-    const gate = yield* PluginExecution.Service
     const title = make({ bus, llm, context, store })
     return Service.of({
-      generate: Effect.fnUntraced(function* (sessionID) {
-        const session = yield* store.get(sessionID)
-        if (!session) return
-        return yield* gate.lease({ id: session.id, admission: true }, title.generate(database.db, sessionID))
-      }),
+      generate: (sessionID) => title.generate(database.db, sessionID),
     })
   }),
 )
@@ -181,5 +175,5 @@ export const layer = Layer.effect(
 export const node = makeLocationNode({
   service: Service,
   layer,
-  deps: [Bus.node, llmClient, SessionContext.node, SessionStore.node, Database.node, PluginExecution.node],
+  deps: [Bus.node, llmClient, SessionContext.node, SessionStore.node, Database.node],
 })

packages/core/src/tool/plugin/shell.ts

@@ -19,7 +19,7 @@ export const name = "shell"
 export const DEFAULT_TIMEOUT_MS = 2 * 60 * 1_000
 
 const BACKGROUND_INSTRUCTION =
-  "You will be notified automatically when the command finishes. Avoid sleep commands or polling for completion; if you need the output before then, read the file directly."
+  "You will be notified automatically when the command finishes. The notification will include the command's output. DO NOT run sleep commands or poll the output file to check for completion. You can read from the file when its current output would be useful, such as when inspecting logs from a background server. Otherwise, continue with other work or end your response."
 const OS =
   process.platform === "darwin"
     ? "macOS"

packages/core/test/aisdk.test.ts

@@ -757,7 +757,7 @@ it.effect("classifies data-only AI SDK authentication errors", () =>
         data: { error: { code: "authentication_error" } },
       }),
     )
-    expect(error.reason).toMatchObject({ _tag: "Authentication", kind: "invalid" })
+    expect(error.reason).toMatchObject({ _tag: "Authentication" })
     expect(SessionRunnerRetry.isRetryable(error)).toBeFalse()
   }),
 )
@@ -776,7 +776,7 @@ Object.entries({
         responseBody,
       })
       const error = yield* streamFailure(cause)
-      expect(error.reason).toMatchObject({ _tag: "Authentication", kind: "invalid" })
+      expect(error.reason).toMatchObject({ _tag: "Authentication" })
       expect(SessionRunnerRetry.isRetryable(error)).toBeFalse()
       expect(error.reason.body).toBe(responseBody)
       expect(error.reason.cause).toBe(cause)
@@ -823,6 +823,55 @@ it.effect("retries status-less AI SDK transport failures", () =>
   }),
 )
 
+it.effect("classifies native fetch failures as request transport errors", () =>
+  Effect.gen(function* () {
+    const cause = Object.assign(new TypeError("fetch failed"), {
+      cause: Object.assign(new Error("connect ECONNREFUSED 127.0.0.1:443"), { code: "ECONNREFUSED" }),
+    })
+    const error = yield* streamFailure(cause)
+    expect(error.reason).toMatchObject({
+      _tag: "Transport",
+      transport: "http",
+      operation: "request",
+      code: "ECONNREFUSED",
+    })
+    expect(error.message).toBe("connect ECONNREFUSED 127.0.0.1:443")
+    expect(error.reason.cause).toBe(cause)
+    expect(SessionRunnerRetry.isRetryable(error)).toBeTrue()
+  }),
+)
+
+it.effect("classifies mid-stream socket drops as read transport errors", () =>
+  Effect.gen(function* () {
+    const cause = Object.assign(new Error("terminated"), {
+      cause: Object.assign(new Error("other side closed"), { code: "UND_ERR_SOCKET" }),
+    })
+    const error = yield* streamFailure(cause, true)
+    expect(error.reason).toMatchObject({
+      _tag: "Transport",
+      transport: "http",
+      operation: "read",
+      code: "UND_ERR_SOCKET",
+    })
+    expect(SessionRunnerRetry.isRetryable(error)).toBeTrue()
+  }),
+)
+
+it.effect("classifies the SSE chunk timeout as a read transport error", () =>
+  Effect.gen(function* () {
+    const error = yield* streamFailure(new Error("SSE read timed out"), true)
+    expect(error.reason).toMatchObject({ _tag: "Transport", transport: "http", operation: "read" })
+    expect(SessionRunnerRetry.isRetryable(error)).toBeTrue()
+  }),
+)
+
+it.effect("keeps unrecognized error codes on the unknown provider path", () =>
+  Effect.gen(function* () {
+    const error = yield* streamFailure(Object.assign(new Error("kaput"), { code: "E_SOMETHING_ELSE" }), true)
+    expect(error.reason).toBeInstanceOf(UnknownProviderError)
+  }),
+)
+
 it.effect("prefers a structured provider message over the code fallback", () =>
   Effect.gen(function* () {
     const error = yield* streamFailure(

packages/core/test/config/plugin.test.ts

@@ -19,15 +19,13 @@ import { Model } from "@opencode-ai/core/model"
 import { Provider } from "@opencode-ai/core/provider"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Effect, Fiber, Logger, Stream } from "effect"
-import { Npm } from "@opencode-ai/util/npm"
 import { Database } from "../../src/database/database"
 import { tmpdir } from "../fixture/tmpdir"
-import { git } from "../fixture/git"
 import { tempGlobalLayer } from "../fixture/global"
 import { testEffect } from "../lib/effect"
 
 const it = testEffect(
-  AppNodeBuilder.build(LayerNode.group([Database.node, Bus.node, SdkPlugins.node, LocationServiceMap.node, Npm.node]), [
+  AppNodeBuilder.build(LayerNode.group([Database.node, Bus.node, SdkPlugins.node, LocationServiceMap.node]), [
     [Global.node, tempGlobalLayer],
   ]),
 )
@@ -39,85 +37,6 @@ const staticIt = testEffect(
 )
 
 describe("PluginSupervisor config", () => {
-  it.live(
-    "updates a real package graph and retains its active revision after failed import and setup",
-    () =>
-      withLocation(
-        undefined,
-        Effect.gen(function* () {
-          yield* ready()
-          const location = yield* Location.Service
-          const registry = yield* Plugin.Service
-          const supervisor = yield* PluginSupervisor.Service
-          const agents = yield* Agent.Service
-          const npm = yield* Npm.Service
-          const repository = path.join(location.directory, "package")
-          const target = `git+${pathToFileURL(repository).href}#fixture-branch`
-          const initial = (yield* registry.list())[0]
-          expect(initial?.revision).toMatch(/^[0-9a-f]{40}$/)
-          expect((yield* agents.get(Agent.ID.make("package-agent")))?.description).toBe("first")
-          yield* Effect.promise(() => fs.writeFile(path.join(repository, "value.js"), `export const value = "second"`))
-          yield* commitPackage(repository)
-          const check = yield* supervisor.check(target)
-          expect(check.mutable).toBe(true)
-          expect(check.installed).toBe(initial?.revision)
-          expect(check.available).not.toBe(initial?.revision)
-          const updated = (yield* supervisor.update(target))[0]
-          expect(updated?.revision).toBe(check.available)
-          expect(updated?.generation).not.toBe(initial?.generation)
-          expect((yield* agents.get(Agent.ID.make("package-agent")))?.description).toBe("second")
-
-          yield* Effect.promise(() => fs.writeFile(path.join(repository, "index.js"), packagePlugin(true)))
-          yield* commitPackage(repository)
-          const failedSetup = (yield* supervisor.update(target))[0]
-          expect(failedSetup).toEqual({ ...updated, error: expect.stringContaining("package setup failed") })
-          expect((yield* agents.get(Agent.ID.make("package-agent")))?.description).toBe("second")
-          expect((yield* npm.inspect(target)).installed).not.toBe(updated?.revision)
-
-          yield* Effect.promise(() =>
-            fs.writeFile(path.join(repository, "index.js"), `import "./missing.js"; ${packagePlugin()}`),
-          )
-          yield* commitPackage(repository)
-          const failedImport = (yield* supervisor.update(target))[0]
-          expect(failedImport).toEqual({ ...updated, error: expect.stringContaining("missing.js") })
-          expect((yield* agents.get(Agent.ID.make("package-agent")))?.description).toBe("second")
-          const reloaded = (yield* supervisor.reload(target))[0]
-          expect(reloaded?.status).toBe("active")
-          expect(reloaded?.revision).toBe(updated?.revision)
-          expect(reloaded?.error).toBeUndefined()
-          expect(reloaded?.generation).not.toBe(updated?.generation)
-        }),
-        false,
-        async (directory) => {
-          const repository = path.join(directory, "package")
-          await fs.mkdir(repository)
-          await fs.writeFile(
-            path.join(repository, "package.json"),
-            JSON.stringify({
-              name: "fixture-core-plugin",
-              version: "1.0.0",
-              type: "module",
-              exports: "./index.js",
-            }),
-          )
-          await fs.writeFile(path.join(repository, "index.js"), packagePlugin())
-          await fs.writeFile(path.join(repository, "value.js"), `export const value = "first"`)
-          await git(repository, "init", "-q", "-b", "fixture-branch")
-          await Effect.runPromise(commitPackage(repository))
-          await fs.writeFile(
-            path.join(directory, "opencode.json"),
-            JSON.stringify({
-              plugins: [
-                "-*",
-                { package: `git+${pathToFileURL(repository).href}#fixture-branch`, options: { selection: "first" } },
-                { package: `git+${pathToFileURL(repository).href}#fixture-branch`, options: { selection: "last" } },
-              ],
-            }),
-          )
-        },
-      ),
-    30_000,
-  )
   it.live("applies selectors in order", () =>
     withLocation(
       { plugins: ["-opencode.provider.*", "opencode.provider.openai"] },
@@ -586,30 +505,6 @@ export default Plugin.define({
 `
 }
 
-function packagePlugin(fail = false) {
-  return `import { value } from "./value.js"
-export default { id: "package-plugin", tui: true, async setup(ctx) {
-  await ctx.agent.transform((draft) => draft.update("package-agent", (agent) => { agent.description = value }))
-  ${fail ? 'throw new Error("package setup failed")' : ""}
-} }`
-}
-
-const commitPackage = (repository: string) =>
-  Effect.promise(async () => {
-    await git(repository, "add", ".")
-    await git(
-      repository,
-      "-c",
-      "user.name=fixture",
-      "-c",
-      "user.email=fixture@example.com",
-      "commit",
-      "-q",
-      "-m",
-      "fixture",
-    )
-  })
-
 function discoveredPlugin(id: string) {
   return `export default { id: ${JSON.stringify(id)}, setup() {} }`
 }

packages/core/test/filesystem/watcher.test.ts

@@ -22,7 +22,6 @@ import { location } from "../fixture/location"
 import { tmpdir } from "../fixture/tmpdir"
 import { testEffect } from "../lib/effect"
 import { host } from "../plugin/host"
-import { noopPluginSupervisor } from "../fixture/plugin-supervisor"
 
 type WatcherEvent = { file: string; event: "add" | "change" | "unlink" }
 const describeNative = process.env.CI ? describe.skip : describe
@@ -32,7 +31,7 @@ const it = testEffect(AppNodeBuilder.build(LayerNode.group([FSUtil.node, Bus.nod
 const configLayer = Config.testLayer()
 const pluginNode = makeLocationNode({
   service: PluginSupervisor.Service,
-  layer: Layer.succeed(PluginSupervisor.Service, noopPluginSupervisor()),
+  layer: Layer.succeed(PluginSupervisor.Service, PluginSupervisor.Service.of({ flush: Effect.void })),
   deps: [],
 })
 
@@ -315,7 +314,7 @@ describe("LocationWatcher subscriptions", () => {
         Effect.gen(function* () {
           const policy = yield* LocationWatcherPolicy.Service
           yield* policy.transform((draft) => draft.add([".git"]))
-          return noopPluginSupervisor()
+          return PluginSupervisor.Service.of({ flush: Effect.void })
         }),
       ),
       deps: [LocationWatcherPolicy.node],

packages/core/test/fixture/plugin-supervisor.ts

@@ -1,11 +0,0 @@
-import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor-service"
-import { Effect } from "effect"
-
-export const noopPluginSupervisor = (flush: Effect.Effect<unknown> = Effect.void) =>
-  PluginSupervisor.Service.of({
-    flush: Effect.asVoid(flush),
-    initialized: Effect.asVoid(flush),
-    check: () => Effect.die("unused plugin.check"),
-    update: () => Effect.die("unused plugin.update"),
-    reload: () => Effect.die("unused plugin.reload"),
-  })

packages/core/test/fixture/prompt-location.ts

@@ -2,20 +2,17 @@ import { LocationServiceMap } from "@opencode-ai/core/location-service-map"
 import type { LocationServices } from "@opencode-ai/core/location-services"
 import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor-service"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { noopPluginSupervisor } from "./plugin-supervisor"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
-import { Layer, LayerMap } from "effect"
+import { Effect, Layer, LayerMap } from "effect"
 
 // Plain-prompt unit fixtures use virtual directories and need only the admission hook services.
 export const promptLocationLayer = Layer.effect(
   LocationServiceMap.Service,
   LayerMap.make(
     () =>
-      Layer.mergeAll(
+      Layer.merge(
         LayerNode.compile(PluginHooks.node),
-        PluginExecution.layer,
-        Layer.succeed(PluginSupervisor.Service, noopPluginSupervisor()),
+        Layer.succeed(PluginSupervisor.Service, { flush: Effect.void }),
       ) as Layer.Layer<LocationServices>,
   ),
 )

packages/core/test/fixture/tmpdir.ts

@@ -3,23 +3,34 @@ import os from "os"
 import path from "path"
 import { Effect } from "effect"
 
+type TempDir = { readonly path: string }
+
 export const tmpdir = async (prefix = "opencode-core-test-") => {
-  const dir = await fs.realpath(await fs.mkdtemp(path.join(os.tmpdir(), prefix)))
+  const dir = await make(prefix)
   return {
     path: dir,
-    async [Symbol.asyncDispose]() {
-      await remove(dir)
+    [Symbol.asyncDispose]() {
+      return remove(dir)
     },
   }
 }
 
-export const withTempDir = <A, E, R>(body: (tmp: Awaited<ReturnType<typeof tmpdir>>) => Effect.Effect<A, E, R>) =>
+export const tmpdirScoped = (prefix = "opencode-core-test-") =>
+  Effect.acquireRelease(
+    Effect.tryPromise(() => make(prefix)),
+    (dir) => Effect.tryPromise(() => remove(dir)).pipe(Effect.orDie),
+  ).pipe(Effect.map((path) => ({ path })))
+
+export const withTempDir = <A, E, R>(body: (tmp: TempDir) => Effect.Effect<A, E, R>) =>
   Effect.acquireUseRelease(
-    Effect.promise(() => tmpdir()),
-    body,
-    (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
+    Effect.tryPromise(() => make("opencode-core-test-")),
+    (path) => body({ path }),
+    (dir) => Effect.tryPromise(() => remove(dir)).pipe(Effect.orDie),
   )
 
+const make = async (prefix: string) => fs.realpath(await fs.mkdtemp(path.join(os.tmpdir(), prefix)))
+
+// Bun's callback APIs expose short paths and can hang during recursive removal on Windows.
 async function remove(dir: string, retries = 30): Promise<void> {
   try {
     await fs.rm(dir, { recursive: true, force: true })

packages/core/test/location-layer.test.ts

@@ -304,7 +304,7 @@ describe("LocationServiceMap", () => {
     ),
   )
 
-  itWithSdk.live("reconciles Config updates during startup without restarting unchanged plugins", () =>
+  itWithSdk.live("reruns activation for Config updates during startup", () =>
     Effect.acquireRelease(
       Effect.promise(() => tmpdir()),
       (dir) => Effect.promise(() => dir[Symbol.asyncDispose]()),
@@ -316,14 +316,18 @@ describe("LocationServiceMap", () => {
           yield* Effect.promise(() => fs.writeFile(file, "{}"))
           const firstStarted = yield* Deferred.make<void>()
           const releaseFirst = yield* Deferred.make<void>()
+          const secondStarted = yield* Deferred.make<void>()
+          const releaseSecond = yield* Deferred.make<void>()
           const sdk = yield* SdkPlugins.Service
           yield* sdk.register(
             EffectPlugin.define({
               id: "blocked-config-reload",
               effect: () =>
                 Effect.sync(() => ++activations.count).pipe(
-                  Effect.andThen(
-                    Deferred.succeed(firstStarted, undefined).pipe(Effect.andThen(Deferred.await(releaseFirst))),
+                  Effect.flatMap((activation) =>
+                    activation === 1
+                      ? Deferred.succeed(firstStarted, undefined).pipe(Effect.andThen(Deferred.await(releaseFirst)))
+                      : Deferred.succeed(secondStarted, undefined).pipe(Effect.andThen(Deferred.await(releaseSecond))),
                   ),
                 ),
             }),
@@ -351,17 +355,12 @@ describe("LocationServiceMap", () => {
             Effect.provide(context),
             Effect.forkChild,
           )
-          const initialFiber = yield* PluginSupervisor.Service.use((supervisor) => supervisor.initialized).pipe(
-            Effect.provide(context),
-            Effect.forkChild({ startImmediately: true }),
-          )
-          expect(initialFiber.pollUnsafe()).toBeUndefined()
           yield* Deferred.succeed(releaseFirst, undefined)
+          yield* Deferred.await(secondStarted)
+          expect(flushFiber.pollUnsafe()).toBeUndefined()
+          yield* Deferred.succeed(releaseSecond, undefined)
           yield* Fiber.join(flushFiber)
-          yield* Fiber.join(initialFiber)
-          expect(activations.count).toBe(1)
-          const inventory = yield* Plugin.Service.use((plugins) => plugins.list()).pipe(Effect.provide(context))
-          expect(inventory.map((plugin) => plugin.id)).toContain(Plugin.ID.make("config-effect-plugin"))
+          expect(activations.count).toBe(2)
         }),
       ),
     ),

packages/core/test/npm.test.ts

@@ -2,12 +2,11 @@ import fs from "fs/promises"
 import path from "path"
 import { pathToFileURL } from "url"
 import { describe, expect, test } from "bun:test"
-import { Cause, Effect, Exit, Fiber, Layer } from "effect"
+import { Effect } from "effect"
 import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
 import { Global } from "@opencode-ai/util/global"
 import { Npm } from "@opencode-ai/util/npm"
-import { tmpdir, withTempDir } from "./fixture/tmpdir"
-import { testEffect } from "./lib/effect"
+import { tmpdir } from "./fixture/tmpdir"
 
 const win = process.platform === "win32"
 
@@ -28,27 +27,12 @@ async function createGitFixture(directory: string) {
   await fs.mkdir(path.join(repository, "dependency"), { recursive: true })
   await writePackage(repository, {
     name: "fixture-git-plugin",
-    type: "module",
-    exports: { ".": "./index.js", "./cjs": "./index.cjs" },
+    exports: "./index.js",
     dependencies: { "fixture-dependency": "file:./dependency" },
   })
-  await writePackage(path.join(repository, "dependency"), {
-    name: "fixture-dependency",
-    type: "module",
-    exports: { import: "./index.js", require: "./index.cjs" },
-  })
-  await Bun.write(
-    path.join(repository, "index.js"),
-    'import { dependency } from "fixture-dependency"\nimport { relative } from "./relative.js"\nexport default { root: true }\nexport { dependency, relative }\n',
-  )
-  await Bun.write(path.join(repository, "relative.js"), 'export const relative = { value: "first" }\n')
-  await Bun.write(path.join(repository, "dependency", "index.js"), 'export const dependency = { value: "first" }\n')
-  await Bun.write(
-    path.join(repository, "index.cjs"),
-    'module.exports = { relative: require("./relative.cjs"), dependency: require("fixture-dependency") }\n',
-  )
-  await Bun.write(path.join(repository, "relative.cjs"), 'module.exports = { value: "first" }\n')
-  await Bun.write(path.join(repository, "dependency", "index.cjs"), 'module.exports = { value: "first" }\n')
+  await writePackage(path.join(repository, "dependency"), { name: "fixture-dependency", exports: "./index.js" })
+  await Bun.write(path.join(repository, "index.js"), "export default { root: true }\n")
+  await Bun.write(path.join(repository, "dependency", "index.js"), "export const dependency = true\n")
 
   const subdirectory = path.join(repository, "packages", "subdirectory-plugin")
   await fs.mkdir(path.join(subdirectory, "dependency"), { recursive: true })
@@ -71,123 +55,6 @@ async function createGitFixture(directory: string) {
   return { repository, commit }
 }
 
-async function advanceGitFixture(repository: string, value: string) {
-  await Bun.write(path.join(repository, "relative.js"), `export const relative = { value: ${JSON.stringify(value)} }\n`)
-  await Bun.write(
-    path.join(repository, "dependency", "index.js"),
-    `export const dependency = { value: ${JSON.stringify(value)} }\n`,
-  )
-  await Bun.write(path.join(repository, "relative.cjs"), `module.exports = { value: ${JSON.stringify(value)} }\n`)
-  await Bun.write(
-    path.join(repository, "dependency", "index.cjs"),
-    `module.exports = { value: ${JSON.stringify(value)} }\n`,
-  )
-  await Bun.$`git -C ${repository} add .`
-  await Bun.$`git -C ${repository} -c user.name=fixture -c user.email=fixture@example.com commit -qm ${value}`
-  return Bun.$`git -C ${repository} rev-parse HEAD`.text().then((value) => value.trim())
-}
-
-async function createRegistryFixture(directory: string) {
-  const tarballs = new Map<string, Uint8Array>()
-  for (const version of ["1.0.0", "1.1.0", "1.2.0"]) {
-    const root = path.join(directory, version)
-    const pkg = path.join(root, "package")
-    await fs.mkdir(pkg, { recursive: true })
-    await writePackage(pkg, {
-      name: "@fixture/registry-plugin",
-      version,
-      type: "module",
-      exports: { ".": "./index.js", "./tui": "./index.js" },
-      dependencies: { "@fixture/registry-dependency": "^1.0.0" },
-    })
-    await Bun.write(
-      path.join(pkg, "index.js"),
-      'export { relative } from "./relative.js"\nexport { dependency } from "@fixture/registry-dependency"\n',
-    )
-    await Bun.write(path.join(pkg, "relative.js"), `export const relative = { value: ${JSON.stringify(version)} }\n`)
-    await Bun.$`tar -czf ${path.join(root, "package.tgz")} -C ${root} package`
-    tarballs.set(version, await Bun.file(path.join(root, "package.tgz")).bytes())
-  }
-  for (const version of ["1.0.0", "1.1.0"]) {
-    const root = path.join(directory, `dependency-${version}`)
-    const pkg = path.join(root, "package")
-    await fs.mkdir(pkg, { recursive: true })
-    await writePackage(pkg, { name: "@fixture/registry-dependency", version, type: "module", exports: "./index.js" })
-    await Bun.write(path.join(pkg, "index.js"), `export const dependency = { value: ${JSON.stringify(version)} }\n`)
-    await Bun.$`tar -czf ${path.join(root, "package.tgz")} -C ${root} package`
-    tarballs.set(`dependency-${version}`, await Bun.file(path.join(root, "package.tgz")).bytes())
-  }
-  const state = {
-    latest: "1.0.0",
-    dependency: "1.0.0",
-    requests: 0,
-    offline: false,
-    beforeTarball: () => Promise.resolve(),
-  }
-  const server = Bun.serve({
-    hostname: "127.0.0.1",
-    port: 0,
-    async fetch(request) {
-      state.requests++
-      if (state.offline) return new Response("offline", { status: 503 })
-      if (request.headers.get("authorization") !== "Bearer fixture-only-token")
-        return new Response("unauthorized", { status: 401 })
-      const url = new URL(request.url)
-      if (decodeURIComponent(url.pathname) === "/@fixture/registry-dependency")
-        return Response.json({
-          name: "@fixture/registry-dependency",
-          "dist-tags": { latest: state.dependency },
-          versions: Object.fromEntries(
-            ["1.0.0", ...(state.dependency === "1.1.0" ? ["1.1.0"] : [])].map((version) => [
-              version,
-              {
-                name: "@fixture/registry-dependency",
-                version,
-                dist: { tarball: `${url.origin}/tarball/dependency-${version}.tgz` },
-              },
-            ]),
-          ),
-        })
-      if (decodeURIComponent(url.pathname) === "/@fixture/registry-plugin")
-        return Response.json({
-          name: "@fixture/registry-plugin",
-          "dist-tags": { latest: state.latest },
-          versions: Object.fromEntries(
-            ["1.0.0", "1.1.0", "1.2.0", "1.3.0"].map((version) => [
-              version,
-              {
-                name: "@fixture/registry-plugin",
-                version,
-                dependencies: { "@fixture/registry-dependency": "^1.0.0" },
-                dist: { tarball: `${url.origin}/tarball/${version}.tgz` },
-              },
-            ]),
-          ),
-        })
-      const tarball = tarballs.get(url.pathname.replace("/tarball/", "").replace(".tgz", ""))
-      if (tarball) await state.beforeTarball()
-      return tarball ? new Response(tarball) : new Response("missing tarball", { status: 404 })
-    },
-  })
-  return {
-    state,
-    async configure(cache: string, spec: string) {
-      const root = path.join(cache, "packages", await Npm.cacheKey(spec))
-      await fs.mkdir(root, { recursive: true })
-      await Bun.write(
-        path.join(root, ".npmrc"),
-        `registry=${server.url}\n@fixture:registry=${server.url}\n//${server.url.host}/:_authToken=fixture-only-token\ncache=${path.join(directory, "npm-cache")}\nfetch-retries=0\naudit=false\n`,
-      )
-      return root
-    },
-    async [Symbol.asyncDispose]() {
-      await server.stop(true)
-    },
-  }
-}
-
-const it = testEffect(Layer.empty)
-
 describe("Npm.sanitize", () => {
   test("keeps normal scoped package specs unchanged", () => {
     expect(Npm.sanitize("@opencode/acme")).toBe("@opencode/acme")
@@ -336,10 +203,7 @@ describe("Npm.add", () => {
       expect(
         await fs.stat(path.join(path.dirname(entries.added.directory), "fixture-dependency", "package.json")),
       ).toBeTruthy()
-      expect(entries.added.directory).toContain(
-        path.join("packages", await Npm.cacheKey(spec), "generations", entries.added.generation, "node_modules"),
-      )
-      expect(entries.added.revision).toBe(fixture.commit)
+      expect(entries.added.directory).toContain(path.join("packages", await Npm.cacheKey(spec), "node_modules"))
     }
   })
 
@@ -357,15 +221,6 @@ describe("Npm.add", () => {
     expect(
       await fs.stat(path.join(path.dirname(entry.directory), "fixture-subdirectory-dependency", "package.json")),
     ).toBeTruthy()
-    await advanceGitFixture(fixture.repository, "second")
-    const exact = await Effect.gen(function* () {
-      const npm = yield* Npm.Service
-      return yield* npm.add(`git+file://${fixture.repository}#fixture-branch::path:packages/subdirectory-plugin`, {
-        revision: fixture.commit,
-      })
-    }).pipe(Effect.provide(npmLayer(path.join(tmp.path, "cache"))), Effect.runPromise)
-    expect(exact.revision).toBe(fixture.commit)
-    expect(exact.directory).toEndWith(path.join("node_modules", "fixture-subdirectory-plugin"))
   })
 
   // Several real Git installs and refreshes exceed Bun's default timeout on Windows.
@@ -438,427 +293,3 @@ describe("Npm.resolve", () => {
     expect(resolved.entrypoint).toEndWith("/tui.js")
   })
 })
-
-describe("Npm generations", () => {
-  it.live(
-    "loads the cached immutable graph while an updater holds the install lock",
-    withTempDir((tmp) =>
-      Effect.gen(function* () {
-        const fixture = yield* Effect.acquireRelease(
-          Effect.promise(() => createRegistryFixture(tmp.path)),
-          (fixture) => Effect.promise(() => fixture[Symbol.asyncDispose]()),
-        )
-        const cache = path.join(tmp.path, "cache")
-        const spec = "@fixture/registry-plugin@latest"
-        yield* Effect.promise(() => fixture.configure(cache, spec))
-        yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          const first = yield* npm.add(spec, { refresh: true })
-          fixture.state.latest = "1.1.0"
-          fixture.state.dependency = "1.1.0"
-          const started = Promise.withResolvers<void>()
-          const resume = Promise.withResolvers<void>()
-          fixture.state.beforeTarball = () => {
-            started.resolve()
-            return resume.promise
-          }
-          const updating = yield* npm.update(spec).pipe(Effect.forkScoped)
-          yield* Effect.gen(function* () {
-            yield* Effect.promise(() => started.promise).pipe(Effect.timeout("5 seconds"))
-            const adding = yield* Effect.all([
-              npm.add(spec),
-              npm.add(spec, { revision: first.revision, subpaths: ["tui"] }),
-              npm.add(spec, { refresh: true }),
-            ]).pipe(Effect.forkScoped)
-            // Timeout the join, not uninterruptible lock acquisition; release the updater before scoped cleanup.
-            expect(yield* Fiber.join(adding).pipe(Effect.timeout("5 seconds"))).toEqual([first, first, first])
-            expect(updating.pollUnsafe()).toBeUndefined()
-          }).pipe(Effect.ensuring(Effect.sync(() => resume.resolve())))
-          const updated = yield* Fiber.join(updating)
-          expect(updated.revision).toBe("1.1.0")
-          expect(updated.generation).not.toBe(first.generation)
-          expect(yield* npm.add(spec)).toEqual(updated)
-          const retained = yield* Effect.promise(() => import(first.entrypoint ?? ""))
-          expect(retained.relative.value).toBe("1.0.0")
-          expect(retained.dependency.value).toBe("1.0.0")
-        }).pipe(Effect.provide(npmLayer(cache)))
-      }),
-    ),
-    30_000,
-  )
-
-  it.live(
-    "reloads the retained local generation when the same npm revision acquired a different dependency graph",
-    withTempDir((tmp) =>
-      Effect.gen(function* () {
-        const fixture = yield* Effect.acquireRelease(
-          Effect.promise(() => createRegistryFixture(tmp.path)),
-          (fixture) => Effect.promise(() => fixture[Symbol.asyncDispose]()),
-        )
-        const cache = path.join(tmp.path, "cache")
-        const spec = "@fixture/registry-plugin@latest"
-        const pinned = "@fixture/registry-plugin@1.0.0"
-        const root = yield* Effect.promise(() => fixture.configure(cache, spec))
-        yield* Effect.promise(() => fixture.configure(cache, pinned))
-        const entries = yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          const first = yield* npm.add(spec)
-          const loaded = yield* Effect.promise(() => import(first.entrypoint ?? ""))
-          expect(loaded.dependency.value).toBe("1.0.0")
-          fixture.state.dependency = "1.1.0"
-          const second = yield* npm.update(spec)
-          expect(second.revision).toBe(first.revision)
-          expect(second.generation).not.toBe(first.generation)
-          expect((yield* Effect.promise(() => import(second.entrypoint ?? ""))).dependency.value).toBe("1.1.0")
-          expect(yield* npm.resolve(spec, { revision: first.revision })).toEqual(second)
-          const foreign = yield* npm.add(pinned)
-          return { first, second, foreign, loaded }
-        }).pipe(Effect.provide(npmLayer(cache)))
-        fixture.state.offline = true
-        const requests = fixture.state.requests
-        yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          expect(yield* npm.resolve(spec)).toEqual(entries.second)
-          expect((yield* npm.reload(spec, { generation: "../../outside" }).pipe(Effect.flip))._tag).toBe(
-            "NpmInstallFailedError",
-          )
-          expect((yield* npm.reload(spec, { generation: entries.foreign.generation }).pipe(Effect.flip))._tag).toBe(
-            "NpmInstallFailedError",
-          )
-          expect(
-            (yield* npm.reload(spec, { generation: entries.first.generation, revision: "1.1.0" }).pipe(Effect.flip))
-              ._tag,
-          ).toBe("NpmInstallFailedError")
-          expect(yield* npm.resolve(spec)).toEqual(entries.second)
-          const reloaded = yield* npm.reload(spec, {
-            generation: entries.first.generation,
-            revision: entries.first.revision,
-          })
-          expect(reloaded.revision).toBe(entries.first.revision)
-          expect(reloaded.generation).not.toBe(entries.first.generation)
-          const fresh = yield* Effect.promise(() => import(reloaded.entrypoint ?? ""))
-          expect(fresh.dependency.value).toBe("1.0.0")
-          expect(fresh.dependency).not.toBe(entries.loaded.dependency)
-          expect(yield* npm.resolve(spec)).toEqual(reloaded)
-          expect(fixture.state.requests).toBe(requests)
-          expect(
-            yield* Effect.promise(() =>
-              Bun.file(path.join(root, "generations", entries.first.generation, "generation.json")).json(),
-            ),
-          ).toEqual({ name: "@fixture/registry-plugin", generation: entries.first.generation, revision: "1.0.0" })
-          expect(
-            yield* Effect.promise(() =>
-              Bun.file(path.join(path.dirname(entries.second.directory), "registry-dependency", "index.js")).text(),
-            ),
-          ).toContain('"1.1.0"')
-        }).pipe(Effect.provide(npmLayer(cache)))
-      }),
-    ),
-    30_000,
-  )
-
-  it.live(
-    "defers cancellation through publication without removing the committed generation",
-    withTempDir((tmp) =>
-      Effect.gen(function* () {
-        const fixture = yield* Effect.acquireRelease(
-          Effect.promise(() => createRegistryFixture(tmp.path)),
-          (fixture) => Effect.promise(() => fixture[Symbol.asyncDispose]()),
-        )
-        const cache = path.join(tmp.path, "cache")
-        const spec = "@fixture/registry-plugin@latest"
-        const root = yield* Effect.promise(() => fixture.configure(cache, spec))
-        yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          const first = yield* npm.add(spec)
-          fixture.state.latest = "1.1.0"
-          const started = Promise.withResolvers<void>()
-          const resume = Promise.withResolvers<void>()
-          fixture.state.beforeTarball = () => {
-            started.resolve()
-            return resume.promise
-          }
-          const updating = yield* npm.update(spec).pipe(Effect.forkScoped)
-          yield* Effect.promise(() => started.promise)
-          updating.interruptUnsafe()
-          expect(updating.pollUnsafe()).toBeUndefined()
-          resume.resolve()
-          const exit = yield* Fiber.await(updating)
-          expect(Exit.isFailure(exit) && Cause.hasInterruptsOnly(exit.cause)).toBe(true)
-          // The pending interrupt is observed after publication, outside staging's cleanup boundary.
-          const published = yield* npm.resolve(spec)
-          expect(published.revision).toBe("1.1.0")
-          expect(published.generation).not.toBe(first.generation)
-          expect((yield* Effect.promise(() => import(published.entrypoint ?? ""))).relative.value).toBe("1.1.0")
-          expect(yield* Effect.promise(() => Bun.file(path.join(first.directory, "relative.js")).text())).toContain(
-            '"1.0.0"',
-          )
-          expect((yield* Effect.promise(() => fs.readdir(path.join(root, "generations")))).length).toBe(2)
-        }).pipe(Effect.provide(npmLayer(cache)))
-      }),
-    ),
-    30_000,
-  )
-
-  it.live(
-    "finds binaries in published generations and keeps their old files usable after reload",
-    withTempDir((tmp) =>
-      Effect.gen(function* () {
-        const fixture = path.join(tmp.path, "binary")
-        yield* Effect.promise(async () => {
-          await fs.mkdir(fixture)
-          await writePackage(fixture, {
-            name: "fixture-bin",
-            bin: { "fixture-bin": "./cli.js", "fixture-other": "./other.js" },
-          })
-          await Bun.write(path.join(fixture, "cli.js"), '#!/usr/bin/env node\nconsole.log(require("./value.cjs"))\n')
-          await Bun.write(path.join(fixture, "value.cjs"), 'module.exports = "fixture"\n')
-          await Bun.write(path.join(fixture, "other.js"), '#!/usr/bin/env node\nconsole.log("other")\n')
-        })
-        const spec = `fixture-bin@file:${fixture}`
-        const cache = path.join(tmp.path, "cache")
-        yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          const binary = yield* npm.which(spec)
-          expect(binary).toEndWith(path.join(".bin", "fixture-bin"))
-          expect(yield* npm.which(spec, "fixture-other")).toEndWith(path.join(".bin", "fixture-other"))
-          expect(yield* npm.which(spec, "missing")).toBeUndefined()
-          const original = yield* npm.resolve(spec)
-          const reloaded = yield* npm.reload(spec)
-          expect(reloaded.generation).not.toBe(original.generation)
-          const fresh = yield* npm.which(spec)
-          expect(fresh).not.toBe(binary)
-          expect(fresh).toContain(reloaded.generation)
-          expect(yield* Effect.promise(() => Bun.file(binary ?? "").text())).toContain("value.cjs")
-          expect(yield* Effect.promise(() => Bun.file(fresh ?? "").text())).toContain("value.cjs")
-          if (!win)
-            yield* Effect.promise(async () => {
-              const child = Bun.spawn([process.execPath, fresh ?? ""], { stdout: "pipe", stderr: "pipe" })
-              expect(await child.exited, await new Response(child.stderr).text()).toBe(0)
-              expect(await new Response(child.stdout).text()).toBe("fixture\n")
-            })
-        }).pipe(Effect.provide(npmLayer(cache)))
-      }),
-    ),
-  )
-
-  it.live(
-    "checks without changing files, updates repeatedly, preserves pins, and reloads the whole Git graph offline",
-    withTempDir((tmp) =>
-      Effect.gen(function* () {
-        const fixture = yield* Effect.promise(() => createGitFixture(tmp.path))
-        const cache = path.join(tmp.path, "cache")
-        const spec = `git+${pathToFileURL(fixture.repository).href}#fixture-branch`
-        const pinned = `git+${pathToFileURL(fixture.repository).href}#${fixture.commit}`
-        const entries = yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          const first = yield* npm.add(spec, { refresh: true })
-          const pin = yield* npm.add(pinned)
-          const firstModule = yield* Effect.promise(() => import(first.entrypoint ?? ""))
-          expect(firstModule.relative.value).toBe("first")
-          expect(firstModule.dependency.value).toBe("first")
-          const secondCommit = yield* Effect.promise(() => advanceGitFixture(fixture.repository, "second"))
-          expect(yield* npm.check(spec)).toEqual({ installed: fixture.commit, available: secondCommit, mutable: true })
-          expect(yield* npm.resolve(spec)).toEqual(first)
-          expect(yield* npm.add(spec, { refresh: true })).toEqual(first)
-          const second = yield* npm.update(spec)
-          expect(second.revision).toBe(secondCommit)
-          const secondModule = yield* Effect.promise(() => import(second.entrypoint ?? ""))
-          expect(secondModule.relative.value).toBe("second")
-          expect(secondModule.dependency.value).toBe("second")
-          expect(second.generation).not.toBe(first.generation)
-          const thirdCommit = yield* Effect.promise(() => advanceGitFixture(fixture.repository, "third"))
-          const third = yield* npm.update(spec)
-          expect(third.revision).toBe(thirdCommit)
-          const thirdModule = yield* Effect.promise(() => import(third.entrypoint ?? ""))
-          expect(thirdModule.relative.value).toBe("third")
-          expect(thirdModule.dependency.value).toBe("third")
-          const thirdCjs = yield* npm.resolve(spec, { subpaths: ["cjs"] })
-          const thirdCommonJs = yield* Effect.promise(() => import(thirdCjs.entrypoint ?? ""))
-          expect(thirdCommonJs.default.relative.value).toBe("third")
-          expect(thirdCommonJs.default.dependency.value).toBe("third")
-          expect(yield* npm.check(pinned)).toEqual({
-            installed: fixture.commit,
-            available: fixture.commit,
-            mutable: false,
-          })
-          expect(yield* npm.update(pinned)).toEqual(pin)
-          const companionCommit = yield* Effect.promise(() => advanceGitFixture(fixture.repository, "companion"))
-          const companion = yield* npm.add(spec, { revision: companionCommit })
-          expect(companion.revision).toBe(companionCommit)
-          expect((yield* Effect.promise(() => import(companion.entrypoint ?? ""))).dependency.value).toBe("companion")
-          expect(yield* npm.resolve(spec)).toEqual(third)
-          expect(yield* npm.resolve(spec, { revision: companionCommit })).toEqual(companion)
-          yield* Effect.promise(() => fs.rename(fixture.repository, `${fixture.repository}-offline`))
-          const root = path.join(cache, "packages", yield* Effect.promise(() => Npm.cacheKey(spec)))
-          const before = yield* Effect.promise(() => fs.readdir(path.join(root, "generations")))
-          expect((yield* npm.update(spec).pipe(Effect.flip))._tag).toBe("NpmInstallFailedError")
-          expect(yield* Effect.promise(() => fs.readdir(path.join(root, "generations")))).toEqual(before)
-          expect(yield* npm.resolve(spec)).toEqual(third)
-          const reloaded = yield* npm.reload(spec)
-          expect(reloaded.revision).toBe(thirdCommit)
-          expect(reloaded.generation).not.toBe(third.generation)
-          const reloadedModule = yield* Effect.promise(() => import(reloaded.entrypoint ?? ""))
-          expect(reloadedModule.relative).toEqual(thirdModule.relative)
-          expect(reloadedModule.relative).not.toBe(thirdModule.relative)
-          expect(reloadedModule.dependency).not.toBe(thirdModule.dependency)
-          const freshCjs = yield* npm.resolve(spec, { subpaths: ["cjs"] })
-          const freshCommonJs = yield* Effect.promise(() => import(freshCjs.entrypoint ?? ""))
-          expect(freshCommonJs.default.relative).not.toBe(thirdCommonJs.default.relative)
-          expect(freshCommonJs.default.dependency).not.toBe(thirdCommonJs.default.dependency)
-          const exactReload = yield* npm.reload(spec, { revision: companionCommit })
-          expect(exactReload.revision).toBe(companionCommit)
-          expect(yield* npm.resolve(spec)).toEqual(reloaded)
-          expect(yield* npm.update(pinned)).toEqual(pin)
-          expect(yield* Effect.promise(() => Bun.file(path.join(first.directory, "relative.js")).text())).toContain(
-            '"first"',
-          )
-          expect(yield* Effect.promise(() => Bun.file(path.join(second.directory, "relative.js")).text())).toContain(
-            '"second"',
-          )
-          return { first, third, reloaded, exactReload, thirdCjs, freshCjs }
-        }).pipe(Effect.provide(npmLayer(cache)))
-        yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          expect(yield* npm.resolve(spec)).toEqual(entries.reloaded)
-          expect(yield* npm.inspect(spec)).toEqual({ installed: entries.third.revision, mutable: true })
-          expect(yield* npm.resolve(spec, { revision: entries.exactReload.revision })).toEqual(entries.exactReload)
-        }).pipe(Effect.provide(npmLayer(cache)))
-        // Exercise the same realpaths in Node's ESM loader as well as Bun's loader above.
-        const node = Bun.which("node")
-        if (node)
-          yield* Effect.promise(async () => {
-            const script = `
-        import assert from "node:assert/strict";
-        const first = await import(${JSON.stringify(entries.first.entrypoint)});
-        const third = await import(${JSON.stringify(entries.third.entrypoint)});
-        const fresh = await import(${JSON.stringify(entries.reloaded.entrypoint)});
-        assert.equal(first.relative.value, "first");
-        assert.equal(third.relative.value, "third");
-        assert.equal(third.dependency.value, "third");
-        assert.notEqual(fresh.relative, third.relative);
-        assert.notEqual(fresh.dependency, third.dependency);
-        const thirdCjs = await import(${JSON.stringify(entries.thirdCjs.entrypoint)});
-        const freshCjs = await import(${JSON.stringify(entries.freshCjs.entrypoint)});
-        assert.equal(thirdCjs.default.relative.value, "third");
-        assert.equal(thirdCjs.default.dependency.value, "third");
-        assert.notEqual(freshCjs.default.relative, thirdCjs.default.relative);
-        assert.notEqual(freshCjs.default.dependency, thirdCjs.default.dependency);
-      `
-            const child = Bun.spawn([node, "--input-type=module", "-e", script], { stdout: "pipe", stderr: "pipe" })
-            expect(await child.exited, await new Response(child.stderr).text()).toBe(0)
-          })
-      }),
-    ),
-    30_000,
-  )
-
-  it.live(
-    "auto-refreshes a legacy Git install once without overwriting it",
-    withTempDir((tmp) =>
-      Effect.gen(function* () {
-        const fixture = yield* Effect.promise(() => createGitFixture(tmp.path))
-        const cache = path.join(tmp.path, "cache")
-        const spec = `git+${pathToFileURL(fixture.repository).href}#fixture-branch`
-        const root = path.join(cache, "packages", yield* Effect.promise(() => Npm.cacheKey(spec)))
-        const initial = yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          return yield* npm.add(spec)
-        }).pipe(Effect.provide(npmLayer(cache)))
-        yield* Effect.promise(async () => {
-          // Recreate the shipped pre-generation cache layout, including its real npm lockfile.
-          await fs.cp(path.join(root, "generations", initial.generation), root, { recursive: true, dereference: true })
-          await fs.rm(path.join(root, "current.json"))
-          await fs.rm(path.join(root, "revisions"), { recursive: true })
-          await fs.rm(path.join(root, "generations"), { recursive: true })
-        })
-        const secondCommit = yield* Effect.promise(() => advanceGitFixture(fixture.repository, "second"))
-        yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          const legacy = yield* npm.resolve(spec)
-          expect(legacy.revision).toBe(fixture.commit)
-          expect(legacy.generation).toStartWith("legacy-")
-          const updated = yield* npm.add(spec, { refresh: true })
-          expect(updated.revision).toBe(secondCommit)
-          expect(updated.directory).not.toBe(legacy.directory)
-          yield* Effect.promise(() => advanceGitFixture(fixture.repository, "third"))
-          expect(yield* npm.add(spec, { refresh: true })).toEqual(updated)
-          expect(yield* Effect.promise(() => Bun.file(path.join(legacy.directory, "relative.js")).text())).toContain(
-            '"first"',
-          )
-          yield* Effect.promise(() => fs.rename(fixture.repository, `${fixture.repository}-offline`))
-          const reloaded = yield* npm.reload(spec, { generation: legacy.generation, revision: legacy.revision })
-          expect(reloaded.revision).toBe(fixture.commit)
-          expect((yield* Effect.promise(() => import(reloaded.entrypoint ?? ""))).dependency.value).toBe("first")
-          expect(yield* npm.resolve(spec)).toEqual(updated)
-        }).pipe(Effect.provide(npmLayer(cache)))
-      }),
-    ),
-    30_000,
-  )
-
-  it.live(
-    "uses npm configuration, stages exact registry revisions, and retains the old graph after a failed tarball",
-    withTempDir((tmp) =>
-      Effect.gen(function* () {
-        const fixture = yield* Effect.acquireRelease(
-          Effect.promise(() => createRegistryFixture(tmp.path)),
-          (fixture) => Effect.promise(() => fixture[Symbol.asyncDispose]()),
-        )
-        const cache = path.join(tmp.path, "cache")
-        const spec = "@fixture/registry-plugin@latest"
-        const pinned = "@fixture/registry-plugin@1.0.0"
-        const root = yield* Effect.promise(() => fixture.configure(cache, spec))
-        yield* Effect.promise(() => fixture.configure(cache, pinned))
-        const updated = yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          expect(yield* npm.inspect(spec)).toEqual({ installed: undefined, mutable: true })
-          expect(yield* npm.check(spec)).toEqual({ installed: undefined, available: "1.0.0", mutable: true })
-          expect((yield* npm.resolve(spec)).entrypoint).toBeUndefined()
-          const first = yield* npm.add(spec, { refresh: true })
-          const pin = yield* npm.add(pinned)
-          const firstModule = yield* Effect.promise(() => import(first.entrypoint ?? ""))
-          fixture.state.latest = "1.1.0"
-          expect(yield* npm.check(spec)).toEqual({ installed: "1.0.0", available: "1.1.0", mutable: true })
-          expect(yield* npm.resolve(spec)).toEqual(first)
-          const second = yield* npm.update(spec, { subpaths: [""] })
-          expect(second.revision).toBe("1.1.0")
-          expect((yield* Effect.promise(() => import(second.entrypoint ?? ""))).relative.value).toBe("1.1.0")
-          expect((yield* npm.update(spec, { subpaths: ["missing"] }).pipe(Effect.flip))._tag).toBe(
-            "NpmInstallFailedError",
-          )
-          expect(yield* npm.resolve(spec)).toEqual(second)
-          const companion = yield* npm.add(spec, { revision: "1.2.0", subpaths: ["tui"] })
-          expect(companion.revision).toBe("1.2.0")
-          expect(yield* npm.resolve(spec)).toEqual(second)
-          fixture.state.latest = "1.3.0"
-          expect((yield* npm.check(spec)).available).toBe("1.3.0")
-          const before = yield* Effect.promise(() => fs.readdir(path.join(root, "generations")))
-          expect((yield* npm.update(spec).pipe(Effect.flip))._tag).toBe("NpmInstallFailedError")
-          expect(yield* Effect.promise(() => fs.readdir(path.join(root, "generations")))).toEqual(before)
-          expect(yield* npm.resolve(spec)).toEqual(second)
-          expect((yield* npm.add(spec, { revision: "latest" }).pipe(Effect.flip))._tag).toBe("NpmInstallFailedError")
-          const requests = fixture.state.requests
-          fixture.state.offline = true
-          expect(yield* npm.check(pinned)).toEqual({ installed: "1.0.0", available: "1.0.0", mutable: false })
-          expect(yield* npm.update(pinned)).toEqual(pin)
-          const reloaded = yield* npm.reload(spec)
-          expect(reloaded.revision).toBe("1.1.0")
-          expect(fixture.state.requests).toBe(requests)
-          expect((yield* Effect.promise(() => import(reloaded.entrypoint ?? ""))).relative.value).toBe("1.1.0")
-          expect(firstModule.relative.value).toBe("1.0.0")
-          expect(yield* Effect.promise(() => Bun.file(path.join(first.directory, "relative.js")).text())).toContain(
-            '"1.0.0"',
-          )
-          return reloaded
-        }).pipe(Effect.provide(npmLayer(cache)))
-        yield* Effect.gen(function* () {
-          const npm = yield* Npm.Service
-          expect(yield* npm.resolve(spec)).toEqual(updated)
-          expect((yield* npm.resolve(spec, { revision: "1.2.0" })).revision).toBe("1.2.0")
-        }).pipe(Effect.provide(npmLayer(cache)))
-      }),
-    ),
-    30_000,
-  )
-})

packages/core/test/plugin.test.ts

@@ -1,6 +1,6 @@
 import { describe, expect } from "bun:test"
 import { ToolFailure } from "@opencode-ai/ai"
-import { Cause, Context, Effect, Exit, Fiber, Latch, Schema, Stream } from "effect"
+import { Context, Effect, Exit, Fiber, Schema, Stream } from "effect"
 import { Plugin as EffectPlugin } from "@opencode-ai/plugin/effect"
 import { Config as ConfigSchema } from "@opencode-ai/schema/config"
 import { Agent } from "@opencode-ai/core/agent"
@@ -8,8 +8,6 @@ import { Bus } from "@opencode-ai/core/bus"
 import { Plugin } from "@opencode-ai/core/plugin"
 import { PluginHost } from "@opencode-ai/core/plugin/host"
 import { PluginRuntime } from "@opencode-ai/core/plugin/runtime"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
 import { Location } from "@opencode-ai/core/location"
 import { Project } from "@opencode-ai/core/project"
 import { AbsolutePath } from "@opencode-ai/core/schema"
@@ -27,178 +25,6 @@ class Secret extends Context.Service<Secret, string>()("@opencode/test/PluginSec
 const versioned = <R>(plugin: EffectPlugin.Plugin<R>, version = "1") => ({ ...plugin, version })
 
 describe("Plugin", () => {
-  it.effect("closes the entire suffix after cleanup defects without leaving old hooks behind", () =>
-    Effect.gen(function* () {
-      const plugins = yield* Plugin.Service
-      const registry = yield* PluginHooks.Service
-      const closed: string[] = []
-      const observed: string[] = []
-      const definition = (id: string, version: string, broken = false) => ({
-        id,
-        version,
-        effect: (ctx: EffectPlugin.Context) =>
-          Effect.gen(function* () {
-            yield* ctx.session.hook("prompt", () =>
-              Effect.sync(() => {
-                observed.push(`${id}${version}`)
-              }),
-            )
-            yield* Effect.addFinalizer(() =>
-              Effect.sync(() => {
-                closed.push(`${id}${version}`)
-                if (broken) throw new Error("cleanup failed")
-              }),
-            )
-          }),
-      })
-      const first = [definition("a", "1"), definition("b", "1"), definition("c", "1", true)]
-      yield* plugins.activate(first)
-      yield* plugins.activate([definition("a", "2"), ...first.slice(1)])
-      expect(closed).toEqual(["c1", "b1", "a1"])
-      expect((yield* plugins.list()).map((plugin) => [plugin.id, plugin.status])).toEqual(
-        ["a", "b", "c"].map((id) => [Plugin.ID.make(id), "active"]),
-      )
-      yield* plugins.activate([definition("a", "2"), definition("b", "2"), definition("c", "2")])
-      yield* registry.trigger("session", "prompt", {
-        sessionID: Session.ID.make("ses_cleanup"),
-        messageID: SessionMessage.ID.make("msg_cleanup"),
-        prompt: { text: "hello" },
-        delivery: "steer",
-        metadata: undefined,
-      })
-      expect(observed).toEqual(["a2", "b2", "c2"])
-      expect(closed).toEqual(["c1", "b1", "a1", "c1", "b1"])
-      yield* plugins.activate([])
-      expect(closed.slice(-3)).toEqual(["c2", "b2", "a2"])
-      expect(yield* plugins.list()).toEqual([])
-    }),
-  )
-  it.effect("does not gate an unchanged generation while a Session lease is held", () =>
-    Effect.gen(function* () {
-      const plugins = yield* Plugin.Service
-      const gate = yield* PluginExecution.Service
-      const definitions = [{ id: "unchanged", version: "1", effect: () => Effect.void }]
-      yield* plugins.activate(definitions)
-      yield* gate.lease({ id: "running" }, plugins.activate(definitions))
-      expect((yield* plugins.list())[0]?.status).toBe("active")
-    }),
-  )
-  it.effect("bounds inventory errors and removes URL credentials and query strings", () =>
-    Effect.sync(() => {
-      const error = Plugin.errorMessage(
-        Cause.die(new Error(`https://user:password@example.com/plugin?token=secret ${"x".repeat(3000)}`)),
-      )
-      expect(error.length).toBeLessThanOrEqual(2000)
-      expect(error).toContain("https://example.com/plugin")
-      expect(error).not.toContain("password")
-      expect(error).not.toContain("token=secret")
-    }),
-  )
-  it.effect("keeps the unchanged registration prefix and preserves suffix ordering", () =>
-    Effect.gen(function* () {
-      const plugins = yield* Plugin.Service
-      const agents = yield* Agent.Service
-      const loads: string[] = []
-      const closed: string[] = []
-      const definition = (id: string, version: string) => ({
-        id,
-        version,
-        effect: (ctx: EffectPlugin.Context) =>
-          Effect.gen(function* () {
-            loads.push(`${id}:${version}`)
-            yield* Effect.addFinalizer(() => Effect.sync(() => closed.push(id)))
-            yield* ctx.agent.transform((draft) =>
-              draft.update("ordered", (agent) => {
-                agent.description = `${agent.description ?? ""}${id}:${version};`
-              }),
-            )
-          }),
-      })
-      const prefix = definition("prefix", "1")
-      const suffix = definition("suffix", "1")
-      yield* plugins.activate([prefix, definition("target", "1"), suffix])
-      yield* plugins.activate([prefix, definition("target", "2"), suffix])
-      expect(loads).toEqual(["prefix:1", "target:1", "suffix:1", "target:2", "suffix:1"])
-      expect(closed).toEqual(["suffix", "target"])
-      expect((yield* agents.get(Agent.ID.make("ordered")))?.description).toBe("prefix:1;target:2;suffix:1;")
-    }),
-  )
-
-  it.effect("does not close plugin resources while a leased snapshot executes", () =>
-    Effect.gen(function* () {
-      const plugins = yield* Plugin.Service
-      const tools = yield* Tool.Service
-      const gate = yield* PluginExecution.Service
-      const started = yield* Latch.make()
-      const finish = yield* Latch.make()
-      let closed = false
-      yield* plugins.activate([
-        {
-          id: "leased",
-          version: "1",
-          revision: "1.0.0",
-          generation: "first",
-          tui: true,
-          effect: (ctx) =>
-            Effect.gen(function* () {
-              yield* Effect.addFinalizer(() =>
-                Effect.sync(() => {
-                  closed = true
-                }),
-              )
-              yield* ctx.tool.transform((draft) =>
-                draft.add({
-                  name: "leased",
-                  description: "Leased tool",
-                  input: Schema.Struct({}),
-                  options: { codemode: false },
-                  execute: () =>
-                    Effect.gen(function* () {
-                      yield* started.open
-                      yield* finish.await
-                      expect(closed).toBe(false)
-                      return { content: "first" }
-                    }),
-                }),
-              )
-            }),
-        },
-      ])
-      const running = yield* gate
-        .lease(
-          { id: "ses_running" },
-          Effect.gen(function* () {
-            const snapshot = yield* tools.snapshot()
-            return yield* snapshot.execute({
-              sessionID: Session.ID.make("ses_running"),
-              agent: Agent.ID.make("build"),
-              messageID: SessionMessage.ID.make("msg_message"),
-              call: { type: "tool-call", id: "call", name: "leased", input: {} },
-            })
-          }),
-        )
-        .pipe(Effect.forkScoped({ startImmediately: true }))
-      yield* started.await
-      const replacement = yield* plugins
-        .activate([
-          {
-            id: "leased",
-            version: "2",
-            revision: "2.0.0",
-            generation: "second",
-            effect: () => Effect.void,
-          },
-        ])
-        .pipe(Effect.forkScoped({ startImmediately: true }))
-      expect(closed).toBe(false)
-      expect((yield* plugins.list())[0]?.revision).toBe("1.0.0")
-      yield* finish.open
-      yield* Fiber.join(running)
-      yield* Fiber.join(replacement)
-      expect(closed).toBe(true)
-      expect((yield* plugins.list())[0]?.revision).toBe("2.0.0")
-    }),
-  )
   it.effect("exposes the current location to activated plugins", () =>
     Effect.gen(function* () {
       const plugins = yield* Plugin.Service
@@ -574,18 +400,16 @@ describe("Plugin", () => {
           }),
       })
 
-      yield* plugins.activate([{ ...versioned(previous), revision: "1.0.0", generation: "previous", tui: true }])
-      yield* plugins.activate([{ ...versioned(replacement, "2"), revision: "2.0.0", generation: "replacement" }])
+      yield* plugins.activate([versioned(previous)])
+      yield* plugins.activate([versioned(replacement, "2")])
 
       expect(yield* plugins.list()).toEqual([
         {
           id: Plugin.ID.make("managed"),
           source: { type: "builtin" },
-          status: "active",
+          status: "failed",
           error: expect.stringContaining("replacement failed"),
-          tui: true,
-          revision: "1.0.0",
-          generation: "previous",
+          tui: false,
         },
       ])
       expect((yield* agents.get(Agent.ID.make("configured")))?.description).toBe("previous")

packages/core/test/plugin/execution.test.ts

@@ -1,152 +0,0 @@
-import { expect } from "bun:test"
-import { Effect, Fiber, Latch } from "effect"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { testEffect } from "../lib/effect"
-
-const it = testEffect(PluginExecution.layer)
-
-it.effect("defers activation through awaited children and titles, blocking unrelated selections", () =>
-  Effect.gen(function* () {
-    const gate = yield* PluginExecution.Service
-    const childAllowed = yield* Latch.make()
-    const titleFinished = yield* Latch.make()
-    const events: string[] = []
-    const parent = yield* gate
-      .lease(
-        { id: "parent" },
-        Effect.gen(function* () {
-          yield* childAllowed.await
-          yield* gate.lease(
-            { id: "child", parentID: "parent" },
-            Effect.gen(function* () {
-              yield* gate.lease(
-                { id: "grandchild", parentID: "child" },
-                Effect.sync(() => events.push("child")),
-              )
-            }),
-          )
-          yield* gate.lease(
-            { id: "new-prompt", admission: true },
-            Effect.sync(() => events.push("admitted")),
-          )
-          events.push("parent")
-        }),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const title = yield* gate
-      .lease(
-        { id: "parent", admission: true },
-        titleFinished.await.pipe(Effect.andThen(Effect.sync(() => events.push("title")))),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const activation = yield* gate
-      .exclusive(Effect.sync(() => events.push("activation")))
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const unrelated = yield* gate
-      .lease(
-        { id: "unrelated" },
-        Effect.sync(() => events.push("selection")),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    expect(events).toEqual([])
-    yield* childAllowed.open
-    yield* Fiber.join(parent)
-    expect(events).toEqual(["child", "admitted", "parent"])
-    yield* titleFinished.open
-    yield* Fiber.join(title)
-    yield* Fiber.join(activation)
-    yield* Fiber.join(unrelated)
-    expect(events).toEqual(["child", "admitted", "parent", "title", "activation", "selection"])
-  }),
-)
-
-it.effect("releases reader leases and pending admission on interruption", () =>
-  Effect.gen(function* () {
-    const gate = yield* PluginExecution.Service
-    const reader = yield* gate.lease({ id: "reader" }, Effect.never).pipe(Effect.forkScoped({ startImmediately: true }))
-    const writer = yield* gate.exclusive(Effect.never).pipe(Effect.forkScoped({ startImmediately: true }))
-    const waiting = yield* gate
-      .lease({ id: "waiting" }, Effect.never)
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    yield* Fiber.interrupt(waiting)
-    yield* Fiber.interrupt(writer)
-    expect(yield* gate.lease({ id: "new" }, Effect.succeed("open"))).toBe("open")
-    yield* Fiber.interrupt(reader)
-    expect(yield* gate.exclusive(Effect.succeed("idle"))).toBe("idle")
-  }),
-)
-
-it.effect("does not let admission-only work establish same-Session or child execution ownership", () =>
-  Effect.gen(function* () {
-    const gate = yield* PluginExecution.Service
-    const finishParent = yield* Latch.make()
-    const finishAdmission = yield* Latch.make()
-    const events: string[] = []
-    const parent = yield* gate
-      .lease({ id: "parent" }, finishParent.await)
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const writer = yield* gate
-      .exclusive(Effect.sync(() => events.push("activation")))
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const admission = yield* gate
-      .lease({ id: "unrelated", admission: true }, finishAdmission.await)
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const unrelated = yield* gate
-      .lease(
-        { id: "unrelated" },
-        Effect.sync(() => events.push("unrelated")),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const child = yield* gate
-      .lease(
-        { id: "child", parentID: "unrelated" },
-        Effect.sync(() => events.push("child")),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    expect(events).toEqual([])
-    yield* finishParent.open
-    yield* Fiber.join(parent)
-    expect(events).toEqual([])
-    yield* finishAdmission.open
-    yield* Fiber.join(admission)
-    yield* Fiber.join(writer)
-    yield* Fiber.join(unrelated)
-    yield* Fiber.join(child)
-    expect(events[0]).toBe("activation")
-    expect(events.slice(1).toSorted()).toEqual(["child", "unrelated"])
-  }),
-)
-
-it.effect("a title-only helper protects its resources without allowing an idle Session or child to drain", () =>
-  Effect.gen(function* () {
-    const gate = yield* PluginExecution.Service
-    const finishTitle = yield* Latch.make()
-    const events: string[] = []
-    const title = yield* gate
-      .lease({ id: "idle", admission: true }, finishTitle.await)
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const writer = yield* gate
-      .exclusive(Effect.sync(() => events.push("activation")))
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const session = yield* gate
-      .lease(
-        { id: "idle" },
-        Effect.sync(() => events.push("session")),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const child = yield* gate
-      .lease(
-        { id: "child", parentID: "idle" },
-        Effect.sync(() => events.push("child")),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    expect(events).toEqual([])
-    yield* finishTitle.open
-    yield* Fiber.join(title)
-    yield* Fiber.join(writer)
-    yield* Fiber.join(session)
-    yield* Fiber.join(child)
-    expect(events[0]).toBe("activation")
-    expect(events.slice(1).toSorted()).toEqual(["child", "session"])
-  }),
-)

packages/core/test/plugin/fixture.ts

@@ -19,7 +19,6 @@ import { Mcp } from "@opencode-ai/core/mcp/index"
 import { Npm } from "@opencode-ai/util/npm"
 import { Plugin } from "@opencode-ai/core/plugin"
 import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
 import { PluginRuntime } from "@opencode-ai/core/plugin/runtime"
 import { Permission } from "@opencode-ai/core/permission"
 import { Reference } from "@opencode-ai/core/reference"
@@ -36,12 +35,8 @@ import { emptyMcpLayer } from "../fixture/mcp"
 const npmLayer = Layer.succeed(
   Npm.Service,
   Npm.Service.of({
-    add: () => Effect.succeed({ directory: "", entrypoint: undefined, generation: "test" }),
-    resolve: () => Effect.succeed({ directory: "", entrypoint: undefined, generation: "test" }),
-    inspect: () => Effect.succeed({ mutable: false }),
-    check: () => Effect.succeed({ mutable: false }),
-    update: () => Effect.die("unused npm.update"),
-    reload: () => Effect.die("unused npm.reload"),
+    add: () => Effect.succeed({ directory: "", entrypoint: undefined }),
+    resolve: () => Effect.succeed({ directory: "", entrypoint: undefined }),
     which: () => Effect.undefined,
   }),
 )
@@ -83,7 +78,6 @@ export const PluginTestLayer = LayerNode.compile(
     PluginRuntime.node,
     Permission.node,
     PluginHooks.node,
-    PluginExecution.node,
     Reference.node,
     Skill.node,
     SkillDiscovery.node,

packages/core/test/plugin/host.ts

@@ -98,9 +98,6 @@ export function host(overrides: Overrides = {}): Plugin.Context {
     },
     plugin: overrides.plugin ?? {
       list: () => Effect.die("unused plugin.list"),
-      check: () => Effect.die("unused plugin.check"),
-      update: () => Effect.die("unused plugin.update"),
-      reload: () => Effect.die("unused plugin.reload"),
     },
     reference: overrides.reference ?? {
       list: () => Effect.die("unused reference.list"),

packages/core/test/plugin/provider-dynamic.test.ts

@@ -22,12 +22,8 @@ const itWithAISDK = testEffect(Layer.mergeAll(PluginTestLayer, AppNodeBuilder.bu
 
 function npmEntrypoint(entrypoint?: string) {
   return Npm.Service.of({
-    add: () => Effect.succeed({ directory: "", entrypoint, generation: "test" }),
-    resolve: () => Effect.succeed({ directory: "", entrypoint, generation: "test" }),
-    inspect: () => Effect.succeed({ mutable: false }),
-    check: () => Effect.succeed({ mutable: false }),
-    update: () => Effect.die("unused npm.update"),
-    reload: () => Effect.die("unused npm.reload"),
+    add: () => Effect.succeed({ directory: "", entrypoint }),
+    resolve: () => Effect.succeed({ directory: "", entrypoint }),
     which: () => Effect.undefined,
   })
 }

packages/core/test/plugin/provider-sap-ai-core.test.ts

@@ -13,12 +13,8 @@ import { PluginTestLayer } from "./fixture"
 const fixtureProvider = new URL("./fixtures/provider-factory.ts", import.meta.url).href
 const it = testEffect(PluginTestLayer)
 const npm = Npm.Service.of({
-  add: () => Effect.succeed({ directory: "", entrypoint: undefined, generation: "test" }),
-  resolve: () => Effect.succeed({ directory: "", entrypoint: undefined, generation: "test" }),
-  inspect: () => Effect.succeed({ mutable: false }),
-  check: () => Effect.succeed({ mutable: false }),
-  update: () => Effect.die("unused npm.update"),
-  reload: () => Effect.die("unused npm.reload"),
+  add: () => Effect.succeed({ directory: "", entrypoint: undefined }),
+  resolve: () => Effect.succeed({ directory: "", entrypoint: undefined }),
   which: () => Effect.undefined,
 })
 

packages/core/test/plugin/session-execution.test.ts

@@ -1,129 +0,0 @@
-import { expect } from "bun:test"
-import { Effect, Fiber, Latch, Layer } from "effect"
-import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"
-import { App } from "@opencode-ai/core/app"
-import { Bus } from "@opencode-ai/core/bus"
-import { Database } from "@opencode-ai/core/database/database"
-import { KV } from "@opencode-ai/core/kv"
-import { Location } from "@opencode-ai/core/location"
-import { LocationServiceMap } from "@opencode-ai/core/location-services"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { Plugin } from "@opencode-ai/core/plugin"
-import { PluginHost } from "@opencode-ai/core/plugin/host"
-import { PluginPromise } from "@opencode-ai/core/plugin/promise"
-import { PluginRuntime } from "@opencode-ai/core/plugin/runtime"
-import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
-import { AbsolutePath } from "@opencode-ai/core/schema"
-import { Session } from "@opencode-ai/core/session"
-import { SessionExecution } from "@opencode-ai/core/session/execution"
-import { SessionGenerate } from "@opencode-ai/core/session/generate"
-import { SessionGenerateNode } from "@opencode-ai/core/session/generate-node"
-import { SessionProjector } from "@opencode-ai/core/session/projector"
-import { Global } from "@opencode-ai/util/global"
-import { LayerNode } from "@opencode-ai/util/effect/layer-node"
-import { tempGlobalLayer } from "../fixture/global"
-import { tmpdir } from "../fixture/tmpdir"
-import { testEffect } from "../lib/effect"
-
-const it = testEffect(
-  AppNodeBuilder.build(
-    LayerNode.group([
-      Database.node,
-      Bus.node,
-      Session.node,
-      SessionProjector.node,
-      LocationServiceMap.node,
-      PluginRuntime.providerNode,
-      PluginRuntime.node,
-      KV.node,
-      App.node,
-    ]),
-    [
-      [Global.node, tempGlobalLayer],
-      [Bus.node, Bus.configured({ persist: true })],
-      [SessionExecution.node, SessionExecution.noopLayer],
-      [
-        SessionGenerateNode.node,
-        Layer.succeed(
-          SessionGenerate.Service,
-          SessionGenerate.Service.of({
-            generate: () => Effect.succeed("generated"),
-          }),
-        ),
-      ],
-    ],
-  ),
-)
-
-for (const mode of ["Effect", "Promise"]) {
-  it.live(`${mode} prompt hooks can await auxiliary Session generation without granting drain ownership`, () =>
-    Effect.gen(function* () {
-      const tmp = yield* Effect.acquireDisposable(Effect.promise(() => tmpdir("opencode-plugin-reentry-")))
-      const locations = yield* LocationServiceMap.Service
-      const sessions = yield* Session.Service
-      const ref = Location.Ref.make({ directory: AbsolutePath.make(tmp.path) })
-      const session = yield* sessions.create({ location: ref })
-      yield* Effect.gen(function* () {
-        const plugins = yield* PluginSupervisor.Service
-        yield* plugins.initialized
-        const gate = yield* PluginExecution.Service
-        const registry = yield* Plugin.Service
-        const host = yield* PluginHost.make(registry)
-        const entered = yield* Latch.make()
-        const proceed = yield* Latch.make()
-        const events: string[] = []
-        if (mode === "Effect") {
-          yield* host.session.hook(
-            "prompt",
-            (event) =>
-              Effect.gen(function* () {
-                yield* entered.open
-                yield* proceed.await
-                events.push(
-                  (yield* host.session
-                    .generate({ sessionID: event.sessionID, prompt: "Generate inside admission" })
-                    .pipe(Effect.orDie)).text,
-                )
-              }),
-            undefined,
-          )
-        }
-        if (mode === "Promise") {
-          yield* PluginPromise.fromPromise({
-            id: "nested-generation",
-            setup: async (ctx) => {
-              await ctx.session.hook("prompt", async (event) => {
-                await Effect.runPromise(entered.open)
-                await Effect.runPromise(proceed.await)
-                events.push(
-                  (await ctx.session.generate({ sessionID: event.sessionID, prompt: "Generate inside admission" }))
-                    .text,
-                )
-              })
-            },
-          }).effect(host)
-        }
-        const preparing = yield* sessions
-          .prompt({ sessionID: session.id, text: "hello", resume: false })
-          .pipe(Effect.forkScoped({ startImmediately: true }))
-        yield* Effect.addFinalizer(() => proceed.open)
-        yield* entered.await
-        const writer = yield* gate
-          .exclusive(Effect.sync(() => events.push("activation")))
-          .pipe(Effect.forkScoped({ startImmediately: true }))
-        const drain = yield* gate
-          .lease(
-            { id: session.id },
-            Effect.sync(() => events.push("drain")),
-          )
-          .pipe(Effect.forkScoped({ startImmediately: true }))
-        expect(events).toEqual([])
-        yield* proceed.open
-        yield* Fiber.join(preparing)
-        yield* Fiber.join(writer)
-        yield* Fiber.join(drain)
-        expect(events).toEqual(["generated", "activation", "drain"])
-      }).pipe(Effect.provide(locations.get(ref)))
-    }),
-  )
-}

packages/core/test/session-error.test.ts

@@ -32,9 +32,7 @@ describe("toSessionError", () => {
       type: "provider.rate-limit",
       message: "rate",
     })
-    expect(toSessionError(llm(new AuthenticationError({ message: "auth", kind: "invalid" }))).type).toBe(
-      "provider.auth",
-    )
+    expect(toSessionError(llm(new AuthenticationError({ message: "auth" }))).type).toBe("provider.auth")
     expect(toSessionError(llm(new QuotaExceededError({ message: "quota" }))).type).toBe("provider.quota")
     expect(toSessionError(llm(new ContentPolicyError({ message: "blocked" }))).type).toBe("provider.content-filter")
     expect(
@@ -129,14 +127,15 @@ describe("toSessionError", () => {
     })
   })
 
-  test("retries only rate limits, provider-internal failures, and transport failures", () => {
+  test("retries rate limits, provider-internal, transport, and unrecognized failures", () => {
     const eligible = [
       llm(new RateLimitError({ message: "rate" })),
       llm(new ProviderInternalError({ message: "internal" })),
       llm(new TransportError({ message: "transport", transport: "http", operation: "request" })),
+      llm(new UnknownProviderError({ message: "unknown" })),
     ]
     const ineligible = [
-      llm(new AuthenticationError({ message: "auth", kind: "invalid" })),
+      llm(new AuthenticationError({ message: "auth" })),
       llm(new QuotaExceededError({ message: "quota" })),
       llm(new ContentPolicyError({ message: "blocked" })),
       llm(new InvalidProviderOutputError({ message: "output" })),
@@ -149,11 +148,10 @@ describe("toSessionError", () => {
           model: ModelID.make("model"),
         }),
       ),
-      llm(new UnknownProviderError({ message: "unknown" })),
     ]
 
-    expect(eligible.map(SessionRunnerRetry.isRetryable)).toEqual([true, true, true])
-    expect(ineligible.map(SessionRunnerRetry.isRetryable)).toEqual([false, false, false, false, false, false, false])
+    expect(eligible.map(SessionRunnerRetry.isRetryable)).toEqual([true, true, true, true])
+    expect(ineligible.map(SessionRunnerRetry.isRetryable)).toEqual([false, false, false, false, false, false])
   })
 
   test("retries transport failures only when delivery is absent or not sent", () => {

packages/core/test/session-generate.test.ts

@@ -46,10 +46,9 @@ import { SessionStore } from "@opencode-ai/core/session/store"
 import { SkillInstructions } from "@opencode-ai/core/skill/instructions"
 import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
 import { Tool } from "@opencode-ai/core/tool"
 import { asc, eq } from "drizzle-orm"
-import { Effect, Fiber, Latch, Layer, Schema, Stream } from "effect"
+import { Effect, Layer, Schema, Stream } from "effect"
 import { testEffect } from "./lib/effect"
 
 const requests: LLMRequest[] = []
@@ -112,7 +111,7 @@ const discovery = Layer.mock(InstructionDiscovery.Service, {
 const skills = Layer.mock(SkillInstructions.Service, { load: () => Effect.succeed(Instructions.empty) })
 const references = Layer.mock(ReferenceInstructions.Service, { load: () => Effect.succeed(Instructions.empty) })
 const mcp = Layer.mock(McpInstructions.Service, { load: () => Effect.succeed(Instructions.empty) })
-const plugins = Layer.mock(PluginSupervisor.Service, { flush: Effect.never, initialized: Effect.void })
+const plugins = Layer.mock(PluginSupervisor.Service, { flush: Effect.void })
 const tools = Layer.mock(Tool.Service, {
   snapshot: () =>
     Effect.succeed({
@@ -140,7 +139,6 @@ const it = testEffect(
       Agent.node,
       InstructionBuiltIns.node,
       PluginHooks.node,
-      PluginExecution.node,
       SessionGenerateNode.node,
     ]),
     [
@@ -227,28 +225,6 @@ const setup = Effect.gen(function* () {
   return { db, bus, instructions: yield* instructionBuiltIns.load(sessionID) }
 })
 
-it.effect("generates under a held Session lease while config reconciliation is pending", () =>
-  Effect.gen(function* () {
-    requests.length = 0
-    instruction = "Initial context"
-    yield* setup
-    const gate = yield* PluginExecution.Service
-    const generate = yield* SessionGenerate.Service
-    const proceed = yield* Latch.make()
-    const running = yield* gate
-      .lease(
-        { id: sessionID },
-        proceed.await.pipe(Effect.andThen(generate.generate({ sessionID, prompt: "Generate with active plugins" }))),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const writer = yield* gate.exclusive(Effect.void).pipe(Effect.forkScoped({ startImmediately: true }))
-    yield* proceed.open
-    expect(yield* Fiber.join(running)).toBe("Transient answer")
-    yield* Fiber.join(writer)
-    expect(requests).toHaveLength(1)
-  }),
-)
-
 it.effect(
   "generates from fresh settled Session context without durable mutation",
   () =>

packages/core/test/session-move.test.ts

@@ -17,7 +17,7 @@ import { SessionExecution } from "@opencode-ai/core/session/execution"
 import { SessionProjector } from "@opencode-ai/core/session/projector"
 import { SessionStore } from "@opencode-ai/core/session/store"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
-import { tmpdir } from "./fixture/tmpdir"
+import { tmpdirScoped } from "./fixture/tmpdir"
 import { testEffect } from "./lib/effect"
 import { globalProjectLayer } from "./lib/project"
 
@@ -49,10 +49,7 @@ const itWithUnavailableDestination = testEffect(
 
 describe("Session.move", () => {
   itWithUnavailableDestination.effect("rejects an unavailable destination before admitting the move", () =>
-    Effect.acquireRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-    ).pipe(
+    tmpdirScoped().pipe(
       Effect.flatMap((tmp) =>
         Effect.gen(function* () {
           const session = yield* Session.Service
@@ -72,10 +69,7 @@ describe("Session.move", () => {
   )
 
   it.effect("applies a move immediately when the source directory no longer exists", () =>
-    Effect.acquireRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-    ).pipe(
+    tmpdirScoped().pipe(
       Effect.flatMap((tmp) =>
         Effect.gen(function* () {
           const session = yield* Session.Service
@@ -111,10 +105,7 @@ describe("Session.move", () => {
   )
 
   it.effect("keeps a moved session out of its former directory's new identity", () =>
-    Effect.acquireRelease(
-      Effect.promise(() => tmpdir()),
-      (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-    ).pipe(
+    tmpdirScoped().pipe(
       Effect.flatMap((tmp) =>
         Effect.gen(function* () {
           const session = yield* Session.Service

packages/core/test/session-prompt.test.ts

@@ -1,6 +1,4 @@
 import { describe, expect } from "bun:test"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { noopPluginSupervisor } from "./fixture/plugin-supervisor"
 import { DateTime, Effect, Fiber, Layer, LayerMap, Schema, Stream } from "effect"
 import { mkdtemp, rm } from "fs/promises"
 import { tmpdir } from "os"
@@ -70,7 +68,6 @@ const locations = Layer.effect(
         Effect.sync(() => {
           let ready = false
           return Layer.mergeAll(
-            PluginExecution.layer,
             LayerNode.compile(PluginHooks.node),
             Layer.mock(Image.Service, {
               normalize: (_resource, content) =>
@@ -81,9 +78,13 @@ const locations = Layer.effect(
             Layer.mock(Snapshot.Service, {
               capture: () =>
                 ready ? Effect.undefined : Effect.die(new Error("Snapshot used before plugins were ready")),
-              restore: () => (ready ? Effect.void : Effect.die(new Error("Snapshot used before plugins were ready"))),
+              restore: () =>
+                ready ? Effect.void : Effect.die(new Error("Snapshot used before plugins were ready")),
             }),
-            Layer.succeed(PluginSupervisor.Service, noopPluginSupervisor(Effect.sync(() => (ready = true)))),
+            Layer.succeed(
+              PluginSupervisor.Service,
+              PluginSupervisor.Service.of({ flush: Effect.sync(() => (ready = true)) }),
+            ),
           )
         }),
       ) as unknown as Layer.Layer<LocationServices>,

packages/core/test/session-remove.test.ts

@@ -16,7 +16,7 @@ import { SessionEnvironment } from "@opencode-ai/core/session/environment"
 import { LocationServiceMap } from "@opencode-ai/core/location-services"
 import { testEffect } from "./lib/effect"
 import { globalProjectLayer } from "./lib/project"
-import { tmpdir } from "./fixture/tmpdir"
+import { tmpdirScoped } from "./fixture/tmpdir"
 
 const closed: Session.ID[] = []
 const transport = Layer.succeed(
@@ -49,10 +49,7 @@ const it = testEffect(
 describe("Session.remove", () => {
   it.effect("removes a session and its children", () =>
     Effect.gen(function* () {
-      const temporary = yield* Effect.acquireRelease(
-        Effect.promise(() => tmpdir()),
-        (directory) => Effect.promise(() => directory[Symbol.asyncDispose]()),
-      )
+      const temporary = yield* tmpdirScoped()
       const location = Location.Ref.make({ directory: AbsolutePath.make(temporary.path) })
       const session = yield* Session.Service
       const parent = yield* session.create({ location })

packages/core/test/session-revert.test.ts

@@ -23,7 +23,7 @@ import { Money } from "@opencode-ai/schema/money"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { Global } from "@opencode-ai/util/global"
 import { tempGlobalLayer } from "./fixture/global"
-import { tmpdir } from "./fixture/tmpdir"
+import { tmpdirScoped } from "./fixture/tmpdir"
 import { testEffect } from "./lib/effect"
 
 const it = testEffect(
@@ -42,10 +42,7 @@ describe("Session.revert files", () => {
     "undoes and restores a file rename without losing either path",
     () =>
       Effect.gen(function* () {
-        const tmp = yield* Effect.acquireRelease(
-          Effect.promise(() => tmpdir()),
-          (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-        )
+        const tmp = yield* tmpdirScoped()
         const directory = path.join(tmp.path, "project")
         const original = path.join(directory, "old name.txt")
         const renamed = path.join(directory, "new name.txt")

packages/core/test/session-runner-recorded.test.ts

@@ -33,7 +33,6 @@ import { SkillInstructions } from "@opencode-ai/core/skill/instructions"
 import { ReferenceInstructions } from "@opencode-ai/core/reference/instructions"
 import { McpInstructions } from "@opencode-ai/core/mcp/instructions"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
-import { noopPluginSupervisor } from "./fixture/plugin-supervisor"
 import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
 import { SystemPromptPlugin } from "@opencode-ai/core/plugin/system-prompt"
 import { describe, expect } from "bun:test"
@@ -86,7 +85,7 @@ const referenceInstructions = Layer.mock(ReferenceInstructions.Service, {
 })
 const mcpInstructions = Layer.mock(McpInstructions.Service, { load: () => Effect.succeed(Instructions.empty) })
 const config = Config.testLayer()
-const pluginSupervisor = Layer.succeed(PluginSupervisor.Service, noopPluginSupervisor())
+const pluginSupervisor = Layer.succeed(PluginSupervisor.Service, PluginSupervisor.Service.of({ flush: Effect.void }))
 const promptCatalog = Layer.mock(Catalog.Service, {
   provider: {
     get: () => Effect.undefined,

packages/core/test/session-runner-tool-events.test.ts

@@ -287,6 +287,29 @@ it.effect("batches reasoning deltas and flushes pending reasoning before the ter
   }),
 )
 
+test("authoritative end values replace accumulated deltas in the durable ended events", async () => {
+  const { published, publisher } = capture()
+  await Effect.runPromise(
+    Effect.forEach(
+      [
+        LLMEvent.textStart({ id: "text" }),
+        LLMEvent.textDelta({ id: "text", text: "Hel" }),
+        LLMEvent.textEnd({ id: "text", text: "Hello!" }),
+        LLMEvent.reasoningStart({ id: "reasoning" }),
+        LLMEvent.reasoningDelta({ id: "reasoning", text: "Thin" }),
+        LLMEvent.reasoningEnd({ id: "reasoning", text: "Thinking done." }),
+      ],
+      publisher.publish,
+      { discard: true },
+    ),
+  )
+
+  expect(published.find((event) => event.type === "session.text.ended.1")?.data).toMatchObject({ text: "Hello!" })
+  expect(published.find((event) => event.type === "session.reasoning.ended.1")?.data).toMatchObject({
+    text: "Thinking done.",
+  })
+})
+
 test("tool input deltas are accumulated without being published", async () => {
   const { published, publisher } = capture()
   await Effect.runPromise(

packages/core/test/session-runner.test.ts

@@ -48,8 +48,6 @@ import { SessionRunnerModel } from "@opencode-ai/core/session/runner/model"
 import { PromptCacheDiagnostics } from "@opencode-ai/core/session/prompt-cache-diagnostics"
 import { SessionUsage } from "@opencode-ai/core/session/usage"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { noopPluginSupervisor } from "./fixture/plugin-supervisor"
 import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
 import { SystemPromptPlugin } from "@opencode-ai/core/plugin/system-prompt"
 import { QuestionTool } from "@opencode-ai/core/tool/plugin/question"
@@ -208,7 +206,6 @@ const makeRunnerState = () => {
     systemLoadHook: Effect.void,
     skillBaselines: new Map<Agent.ID, string>(),
     pluginFlushHook: Effect.void,
-    pluginConfigFlushHook: Effect.void,
     authorizations: new Array<Tool.Context>(),
     executions: new Array<string>(),
     closedTransports: new Array<Session.ID>(),
@@ -389,10 +386,12 @@ const layer = Layer.unwrap(
         }),
       }),
     ])
-    const pluginSupervisor = Layer.succeed(PluginSupervisor.Service, {
-      ...noopPluginSupervisor(Effect.suspend(() => state.pluginFlushHook)),
-      flush: Effect.suspend(() => state.pluginConfigFlushHook),
-    })
+    const pluginSupervisor = Layer.succeed(
+      PluginSupervisor.Service,
+      PluginSupervisor.Service.of({
+        flush: Effect.suspend(() => state.pluginFlushHook),
+      }),
+    )
     const promptCatalog = Layer.mock(Catalog.Service, {
       provider: {
         get: () => Effect.undefined,
@@ -465,7 +464,6 @@ const layer = Layer.unwrap(
         Catalog.node,
         Tool.node,
         PluginHooks.node,
-        PluginExecution.node,
         echoNode,
         SessionRunnerModel.node,
         InstructionBuiltIns.node,
@@ -2899,6 +2897,54 @@ describe("SessionRunnerLLM", () => {
     ])
   })
 
+  scenario("keeps one durable reasoning part when reasoning closes after text", function* (s) {
+    yield* s.admit("Think and answer")
+
+    const details = [{ type: "reasoning.text", text: "thinking", signature: "signed", index: 0 }]
+    yield* s.llm.push(
+      TestLLM.stop(
+        LLMEvent.reasoningStart({ id: "reasoning-0" }),
+        LLMEvent.reasoningDelta({ id: "reasoning-0", text: "thinking" }),
+        LLMEvent.textStart({ id: "text-0" }),
+        LLMEvent.textDelta({ id: "text-0", text: "Hello" }),
+        LLMEvent.textDelta({ id: "text-0", text: " world" }),
+        LLMEvent.reasoningEnd({
+          id: "reasoning-0",
+          providerMetadata: { openai: { reasoningField: "reasoning", reasoningDetails: details } },
+        }),
+        LLMEvent.textEnd({ id: "text-0" }),
+      ),
+    )
+    yield* s.resume
+    yield* replaySessionProjection(sessionID)
+
+    const assistant = requireAssistant(yield* s.context)
+    expect(assistant.content.filter((part) => part.type === "reasoning")).toHaveLength(1)
+    expect(yield* s.context).toMatchObject([
+      Expected.user("Think and answer"),
+      Expected.assistant({}, [
+        {
+          type: "reasoning",
+          text: "thinking",
+          state: { reasoningField: "reasoning", reasoningDetails: details },
+        },
+        { type: "text", text: "Hello world" },
+      ]),
+    ])
+
+    yield* s.admit("Continue")
+    yield* s.llm.push([])
+    yield* s.resume
+
+    expect(s.requests[1]?.messages[1]?.content.filter((part) => part.type === "reasoning")).toEqual([
+      {
+        type: "reasoning",
+        text: "thinking",
+        providerMetadata: { openai: { reasoningField: "reasoning", reasoningDetails: details } },
+      },
+    ])
+  })
+
   scenario("restores durable text provider metadata in the next request", function* (s) {
     yield* s.admit("Check first")
 
@@ -4308,43 +4354,6 @@ describe("SessionRunnerLLM", () => {
     expect((yield* s.context).filter((message) => message.type === "assistant")).toHaveLength(1)
   })
 
-  scenario("defers plugin activation through retry backoff and blocks a new Session drain", function* (s) {
-    const gate = yield* PluginExecution.Service
-    yield* s.admit("Retry before updating plugins")
-    yield* insertSession(otherSessionID)
-    yield* s.session.prompt({ sessionID: otherSessionID, text: "Wait for replacement", resume: false })
-    yield* s.llm.push(
-      Stream.fail(providerUnavailable()),
-      TestLLM.text("Recovered", "text-retry"),
-      TestLLM.text("New generation", "text-new"),
-    )
-    const scheduled = yield* s.bus
-      .subscribe(SessionEvent.RetryScheduled)
-      .pipe(Stream.runHead, Effect.forkScoped({ startImmediately: true }))
-    const running = yield* s.resume.pipe(Effect.forkScoped({ startImmediately: true }))
-    yield* Fiber.join(scheduled)
-    const reconciled = yield* Deferred.make<void>()
-    s.pluginConfigFlushHook = Deferred.await(reconciled)
-    let activated = false
-    const activation = yield* gate
-      .exclusive(
-        Effect.sync(() => {
-          activated = true
-        }).pipe(Effect.andThen(Deferred.succeed(reconciled, undefined))),
-      )
-      .pipe(Effect.forkScoped({ startImmediately: true }))
-    const waiting = yield* s.session.resume(otherSessionID).pipe(Effect.forkScoped({ startImmediately: true }))
-    yield* Effect.yieldNow
-    expect(activated).toBe(false)
-    expect(s.requests).toHaveLength(1)
-    yield* TestClock.adjust("3 seconds")
-    yield* Fiber.join(running)
-    yield* Fiber.join(activation)
-    yield* Fiber.join(waiting)
-    expect(activated).toBe(true)
-    expect(s.requests).toHaveLength(3)
-  })
-
   scenario("does not start another physical attempt after interruption during retry backoff", function* (s) {
     yield* s.admit("Interrupt retry backoff")
     yield* s.llm.push(Stream.fail(providerUnavailable()), TestLLM.text("Must not run", "unused-retry"))

packages/core/test/session-skill.test.ts

@@ -11,8 +11,6 @@ import type { LocationServices } from "@opencode-ai/core/location-services"
 import { Project } from "@opencode-ai/core/project"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor-service"
 import { PluginHooks } from "@opencode-ai/core/plugin/hooks"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { noopPluginSupervisor } from "./fixture/plugin-supervisor"
 import { AbsolutePath } from "@opencode-ai/core/schema"
 import { Session } from "@opencode-ai/core/session"
 import { SessionExecution } from "@opencode-ai/core/session/execution"
@@ -35,13 +33,12 @@ const info = Skill.Info.make({
   content: "Use Effect",
 })
 const skills = Layer.mergeAll(
-  PluginExecution.layer,
   LayerNode.compile(PluginHooks.node),
   Layer.mock(Skill.Service, {
     get: (id) => Effect.succeed(id === info.id ? info : undefined),
     list: () => Effect.succeed([info]),
   }),
-  Layer.succeed(PluginSupervisor.Service, noopPluginSupervisor()),
+  Layer.succeed(PluginSupervisor.Service, { flush: Effect.void }),
 )
 const locations = Layer.effect(
   LocationServiceMap.Service,

packages/core/test/session-title.test.ts

@@ -130,7 +130,7 @@ const it = testEffect(
       [Catalog.node, catalog],
       [SessionRunnerModel.node, models],
       [Location.node, Location.boundNode({ directory: AbsolutePath.make("/project") })],
-      [PluginSupervisor.node, Layer.mock(PluginSupervisor.Service, { flush: Effect.void, initialized: Effect.void })],
+      [PluginSupervisor.node, Layer.mock(PluginSupervisor.Service, { flush: Effect.void })],
     ],
   ),
 )

packages/core/test/session-view.test.ts

@@ -17,7 +17,7 @@ import { SessionStore } from "@opencode-ai/core/session/store"
 import { LayerNode } from "@opencode-ai/util/effect/layer-node"
 import { DateTime, Effect, Layer } from "effect"
 import { asc, eq } from "drizzle-orm"
-import { tmpdir } from "./fixture/tmpdir"
+import { tmpdirScoped } from "./fixture/tmpdir"
 import { testEffect } from "./lib/effect"
 import { globalProjectLayer } from "./lib/project"
 
@@ -182,10 +182,7 @@ describe("Session.view", () => {
         type: event.type,
         data: event.data,
       }))
-      const tmp = yield* Effect.acquireRelease(
-        Effect.promise(() => tmpdir()),
-        (tmp) => Effect.promise(() => tmp[Symbol.asyncDispose]()),
-      )
+      const tmp = yield* tmpdirScoped()
       const targetLayer = AppNodeBuilder.build(
         LayerNode.group([Database.node, Bus.node, SessionProjector.node, SessionStore.node]),
         [

packages/core/test/tool-shell.test.ts

@@ -32,7 +32,6 @@ import { Permission } from "@opencode-ai/core/permission"
 import { PermissionSaved } from "@opencode-ai/core/permission/saved"
 import { PluginRuntime } from "@opencode-ai/core/plugin/runtime"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
-import { noopPluginSupervisor } from "./fixture/plugin-supervisor"
 import { Shell } from "@opencode-ai/core/shell"
 import { ShellSelect } from "@opencode-ai/core/shell/select"
 import { Shell as ShellSchema } from "@opencode-ai/schema/shell"
@@ -128,7 +127,7 @@ const shellPluginSupervisor = makeLocationNode({
   service: PluginSupervisor.Service,
   layer: Layer.effect(
     PluginSupervisor.Service,
-    registerToolPlugin(ShellTool.Plugin).pipe(Effect.as(noopPluginSupervisor())),
+    registerToolPlugin(ShellTool.Plugin).pipe(Effect.as(PluginSupervisor.Service.of({ flush: Effect.void }))),
   ),
   deps: [
     Config.node,
@@ -1296,7 +1295,7 @@ describe("ShellTool", () => {
               },
               {
                 type: "text",
-                text: "You will be notified automatically when the command finishes. Avoid sleep commands or polling for completion; if you need the output before then, read the file directly.",
+                text: "You will be notified automatically when the command finishes. The notification will include the command's output. DO NOT run sleep commands or poll the output file to check for completion. You can read from the file when its current output would be useful, such as when inspecting logs from a background server. Otherwise, continue with other work or end your response.",
               },
             ])
             expect((yield* shell.list()).map((info) => info.id)).toContain(id)
@@ -1536,7 +1535,7 @@ describe("ShellTool", () => {
             })
             expect(settled.content?.[1]).toEqual({
               type: "text",
-              text: "You will be notified automatically when the command finishes. Avoid sleep commands or polling for completion; if you need the output before then, read the file directly.",
+              text: "You will be notified automatically when the command finishes. The notification will include the command's output. DO NOT run sleep commands or poll the output file to check for completion. You can read from the file when its current output would be useful, such as when inspecting logs from a background server. Otherwise, continue with other work or end your response.",
             })
             yield* Effect.sleep(Duration.millis(100))
             expect((yield* shell.get(id)).status).toBe("running")

packages/core/test/tool-subagent.test.ts

@@ -25,7 +25,6 @@ import { SessionRunnerModel } from "@opencode-ai/core/session/runner/model"
 import { SessionStore } from "@opencode-ai/core/session/store"
 import { PluginRuntime } from "@opencode-ai/core/plugin/runtime"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
-import { noopPluginSupervisor } from "./fixture/plugin-supervisor"
 import { Permission } from "@opencode-ai/core/permission"
 import { SubagentTool } from "@opencode-ai/core/tool/plugin/subagent"
 import { Tool } from "@opencode-ai/core/tool"
@@ -101,7 +100,7 @@ const subagentPluginSupervisor = makeLocationNode({
   service: PluginSupervisor.Service,
   layer: Layer.effect(
     PluginSupervisor.Service,
-    registerToolPlugin(SubagentTool.Plugin).pipe(Effect.as(noopPluginSupervisor())),
+    registerToolPlugin(SubagentTool.Plugin).pipe(Effect.as(PluginSupervisor.Service.of({ flush: Effect.void }))),
   ),
   deps: [Agent.node, Config.node, Permission.node, PluginRuntime.node, Tool.node],
 })

packages/plugin/src/promise/adapter.ts

@@ -283,9 +283,6 @@ export function fromPromise(plugin: Plugin) {
           },
           plugin: {
             list: adaptApiMethod(PluginEndpoints["plugin.list"], host.plugin.list),
-            check: adaptApiMethod(PluginEndpoints["plugin.check"], host.plugin.check),
-            update: adaptApiMethod(PluginEndpoints["plugin.update"], host.plugin.update),
-            reload: adaptApiMethod(PluginEndpoints["plugin.reload"], host.plugin.reload),
           },
           reference: {
             list: adaptApiMethod(ReferenceEndpoints["reference.list"], host.reference.list),

packages/protocol/openapi.json

@@ -486,363 +486,6 @@
         "summary": "List plugins"
       }
     },
-    "/api/plugin/check": {
-      "post": {
-        "tags": ["plugin"],
-        "operationId": "v2.plugin.check",
-        "parameters": [
-          {
-            "name": "location",
-            "in": "query",
-            "schema": {
-              "anyOf": [
-                {
-                  "type": "object",
-                  "properties": {
-                    "directory": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "workspace": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "additionalProperties": false
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "required": false,
-            "style": "deepObject",
-            "explode": true
-          }
-        ],
-        "security": [],
-        "responses": {
-          "200": {
-            "description": "Success",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "properties": {
-                    "location": {
-                      "$ref": "#/components/schemas/Location.InfoEncoded"
-                    },
-                    "data": {
-                      "$ref": "#/components/schemas/Plugin.PackageStatus"
-                    }
-                  },
-                  "required": ["location", "data"],
-                  "additionalProperties": false
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "PluginOperationError | InvalidRequestError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "anyOf": [
-                    {
-                      "$ref": "#/components/schemas/PluginOperationErrorEncoded"
-                    },
-                    {
-                      "$ref": "#/components/schemas/InvalidRequestErrorEncoded"
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "401": {
-            "description": "UnauthorizedError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/UnauthorizedErrorEncoded"
-                }
-              }
-            }
-          }
-        },
-        "description": "Check the configured plugin source for a newer compatible revision without activating it.",
-        "summary": "Check plugin updates",
-        "requestBody": {
-          "content": {
-            "application/json": {
-              "schema": {
-                "type": "object",
-                "properties": {
-                  "target": {
-                    "type": "string"
-                  }
-                },
-                "required": ["target"],
-                "additionalProperties": false
-              }
-            }
-          },
-          "required": true
-        }
-      }
-    },
-    "/api/plugin/update": {
-      "post": {
-        "tags": ["plugin"],
-        "operationId": "v2.plugin.update",
-        "parameters": [
-          {
-            "name": "location",
-            "in": "query",
-            "schema": {
-              "anyOf": [
-                {
-                  "type": "object",
-                  "properties": {
-                    "directory": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "workspace": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "additionalProperties": false
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "required": false,
-            "style": "deepObject",
-            "explode": true
-          }
-        ],
-        "security": [],
-        "responses": {
-          "200": {
-            "description": "Success",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "properties": {
-                    "location": {
-                      "$ref": "#/components/schemas/Location.InfoEncoded"
-                    },
-                    "data": {
-                      "type": "array",
-                      "items": {
-                        "$ref": "#/components/schemas/Plugin.Info"
-                      }
-                    }
-                  },
-                  "required": ["location", "data"],
-                  "additionalProperties": false
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "PluginOperationError | InvalidRequestError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "anyOf": [
-                    {
-                      "$ref": "#/components/schemas/PluginOperationErrorEncoded"
-                    },
-                    {
-                      "$ref": "#/components/schemas/InvalidRequestErrorEncoded"
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "401": {
-            "description": "UnauthorizedError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/UnauthorizedErrorEncoded"
-                }
-              }
-            }
-          }
-        },
-        "description": "Update a mutable configured plugin source and activate it after running work finishes.",
-        "summary": "Update plugin",
-        "requestBody": {
-          "content": {
-            "application/json": {
-              "schema": {
-                "type": "object",
-                "properties": {
-                  "target": {
-                    "type": "string"
-                  }
-                },
-                "required": ["target"],
-                "additionalProperties": false
-              }
-            }
-          },
-          "required": true
-        }
-      }
-    },
-    "/api/plugin/reload": {
-      "post": {
-        "tags": ["plugin"],
-        "operationId": "v2.plugin.reload",
-        "parameters": [
-          {
-            "name": "location",
-            "in": "query",
-            "schema": {
-              "anyOf": [
-                {
-                  "type": "object",
-                  "properties": {
-                    "directory": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    },
-                    "workspace": {
-                      "anyOf": [
-                        {
-                          "type": "string"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "additionalProperties": false
-                },
-                {
-                  "type": "null"
-                }
-              ]
-            },
-            "required": false,
-            "style": "deepObject",
-            "explode": true
-          }
-        ],
-        "security": [],
-        "responses": {
-          "200": {
-            "description": "Success",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "properties": {
-                    "location": {
-                      "$ref": "#/components/schemas/Location.InfoEncoded"
-                    },
-                    "data": {
-                      "type": "array",
-                      "items": {
-                        "$ref": "#/components/schemas/Plugin.Info"
-                      }
-                    }
-                  },
-                  "required": ["location", "data"],
-                  "additionalProperties": false
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "PluginOperationError | InvalidRequestError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "anyOf": [
-                    {
-                      "$ref": "#/components/schemas/PluginOperationErrorEncoded"
-                    },
-                    {
-                      "$ref": "#/components/schemas/InvalidRequestErrorEncoded"
-                    }
-                  ]
-                }
-              }
-            }
-          },
-          "401": {
-            "description": "UnauthorizedError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/UnauthorizedErrorEncoded"
-                }
-              }
-            }
-          }
-        },
-        "description": "Reload a configured plugin source without network access after running work finishes.",
-        "summary": "Reload plugin",
-        "requestBody": {
-          "content": {
-            "application/json": {
-              "schema": {
-                "type": "object",
-                "properties": {
-                  "target": {
-                    "type": "string"
-                  }
-                },
-                "required": ["target"],
-                "additionalProperties": false
-              }
-            }
-          },
-          "required": true
-        }
-      }
-    },
     "/api/session": {
       "get": {
         "tags": ["session"],
@@ -1334,16 +977,6 @@
               }
             }
           },
-          "404": {
-            "description": "SessionNotFoundError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/SessionNotFoundErrorEncoded"
-                }
-              }
-            }
-          },
           "409": {
             "description": "ConflictError",
             "content": {
@@ -1355,7 +988,7 @@
             }
           }
         },
-        "description": "Import a projected session transcript at the requested location. If parentID is supplied, the parent session must already exist; import parents before children.",
+        "description": "Import a projected session transcript at the requested location.",
         "summary": "Import session",
         "requestBody": {
           "content": {
@@ -10441,70 +10074,6 @@
         }
       }
     },
-    "/api/experimental/persistent-pty/handoff": {
-      "post": {
-        "tags": ["persistentPty"],
-        "operationId": "server.experimental.persistentPty.handoff",
-        "parameters": [],
-        "security": [],
-        "responses": {
-          "200": {
-            "description": "Success",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "type": "object",
-                  "properties": {
-                    "handoff": {
-                      "anyOf": [
-                        {
-                          "$ref": "#/components/schemas/PersistentPty.Handoff"
-                        },
-                        {
-                          "type": "null"
-                        }
-                      ]
-                    }
-                  },
-                  "required": ["handoff"],
-                  "additionalProperties": false
-                }
-              }
-            }
-          },
-          "400": {
-            "description": "InvalidRequestError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/InvalidRequestErrorEncoded"
-                }
-              }
-            }
-          },
-          "401": {
-            "description": "UnauthorizedError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/UnauthorizedErrorEncoded"
-                }
-              }
-            }
-          },
-          "503": {
-            "description": "ServiceUnavailableError",
-            "content": {
-              "application/json": {
-                "schema": {
-                  "$ref": "#/components/schemas/ServiceUnavailableErrorEncoded"
-                }
-              }
-            }
-          }
-        }
-      }
-    },
     "/api/experimental/persistent-pty/{ptyID}": {
       "get": {
         "tags": ["persistentPty"],
@@ -15414,9 +14983,6 @@
           "name": {
             "type": "string"
           },
-          "metadata": {
-            "type": "object"
-          },
           "methods": {
             "type": "array",
             "items": {
@@ -15927,9 +15493,6 @@
           "reasoningField": {
             "$ref": "#/components/schemas/Model.ReasoningField"
           },
-          "requireReasoning": {
-            "type": "boolean"
-          },
           "maxTokensField": {
             "$ref": "#/components/schemas/Model.MaxTokensField"
           },
@@ -16307,34 +15870,7 @@
             "additionalProperties": false
           }
         },
-        "required": ["args", "title", "env"],
-        "additionalProperties": false
-      },
-      "PersistentPty.Handoff": {
-        "type": "object",
-        "properties": {
-          "directory": {
-            "type": "string"
-          },
-          "instanceID": {
-            "type": "string"
-          },
-          "ticket": {
-            "type": "string"
-          },
-          "expiresAt": {
-            "anyOf": [
-              {
-                "type": "number"
-              },
-              {
-                "type": "string",
-                "enum": ["Infinity", "-Infinity", "NaN"]
-              }
-            ]
-          }
-        },
-        "required": ["directory", "instanceID", "ticket", "expiresAt"],
+        "required": ["command", "args", "cwd", "title", "env"],
         "additionalProperties": false
       },
       "PersistentPty.Info": {
@@ -16506,15 +16042,6 @@
               },
               "tui": {
                 "type": "boolean"
-              },
-              "revision": {
-                "type": "string"
-              },
-              "generation": {
-                "type": "string"
-              },
-              "error": {
-                "type": "string"
               }
             },
             "required": ["id", "source", "status", "tui"],
@@ -16538,12 +16065,6 @@
               },
               "tui": {
                 "type": "boolean"
-              },
-              "revision": {
-                "type": "string"
-              },
-              "generation": {
-                "type": "string"
               }
             },
             "required": ["source", "status", "error", "tui"],
@@ -16551,22 +16072,6 @@
           }
         ]
       },
-      "Plugin.PackageStatus": {
-        "type": "object",
-        "properties": {
-          "installed": {
-            "type": "string"
-          },
-          "available": {
-            "type": "string"
-          },
-          "mutable": {
-            "type": "boolean"
-          }
-        },
-        "required": ["mutable"],
-        "additionalProperties": false
-      },
       "Plugin.Source": {
         "anyOf": [
           {
@@ -16621,20 +16126,6 @@
           }
         ]
       },
-      "PluginOperationErrorEncoded": {
-        "type": "object",
-        "properties": {
-          "_tag": {
-            "type": "string",
-            "enum": ["PluginOperationError"]
-          },
-          "message": {
-            "type": "string"
-          }
-        },
-        "required": ["_tag", "message"],
-        "additionalProperties": false
-      },
       "Project": {
         "type": "object",
         "properties": {
@@ -16731,7 +16222,7 @@
       },
       "Project.Vcs": {
         "type": "string",
-        "pattern": "^[a-z][a-z0-9._-]*$"
+        "enum": ["git", "hg"]
       },
       "ProjectNotFoundErrorEncoded": {
         "type": "object",
@@ -17549,9 +17040,6 @@
               "created": {
                 "type": "number"
               },
-              "streamed": {
-                "type": "number"
-              },
               "completed": {
                 "type": "number"
               }

packages/protocol/src/groups/plugin.ts

@@ -1,7 +1,7 @@
 import { Location } from "@opencode-ai/schema/location"
 import { Plugin } from "@opencode-ai/schema/plugin"
 import { Schema } from "effect"
-import { HttpApiEndpoint, HttpApiGroup, HttpApiSchema, OpenApi } from "effect/unstable/httpapi"
+import { HttpApiEndpoint, HttpApiGroup, OpenApi } from "effect/unstable/httpapi"
 import { LocationQuery, locationQueryOpenApi } from "./location.js"
 
 export const PluginGroup = HttpApiGroup.make("server.plugin")
@@ -19,50 +19,6 @@ export const PluginGroup = HttpApiGroup.make("server.plugin")
         }),
       ),
   )
-  .add(
-    HttpApiEndpoint.post("plugin.check", "/api/plugin/check", {
-      query: LocationQuery,
-      payload: Schema.Struct({ target: Schema.String }),
-      success: Location.response(Plugin.PackageStatus),
-      error: Plugin.OperationError.pipe(HttpApiSchema.status(400)),
-    })
-      .annotateMerge(locationQueryOpenApi)
-      .annotateMerge(
-        OpenApi.annotations({
-          identifier: "v2.plugin.check",
-          summary: "Check plugin updates",
-          description: "Check the configured plugin source for a newer compatible revision without activating it.",
-        }),
-      ),
-    HttpApiEndpoint.post("plugin.update", "/api/plugin/update", {
-      query: LocationQuery,
-      payload: Schema.Struct({ target: Schema.String }),
-      success: Location.response(Schema.Array(Plugin.Info)),
-      error: Plugin.OperationError.pipe(HttpApiSchema.status(400)),
-    })
-      .annotateMerge(locationQueryOpenApi)
-      .annotateMerge(
-        OpenApi.annotations({
-          identifier: "v2.plugin.update",
-          summary: "Update plugin",
-          description: "Update a mutable configured plugin source and activate it after running work finishes.",
-        }),
-      ),
-    HttpApiEndpoint.post("plugin.reload", "/api/plugin/reload", {
-      query: LocationQuery,
-      payload: Schema.Struct({ target: Schema.String }),
-      success: Location.response(Schema.Array(Plugin.Info)),
-      error: Plugin.OperationError.pipe(HttpApiSchema.status(400)),
-    })
-      .annotateMerge(locationQueryOpenApi)
-      .annotateMerge(
-        OpenApi.annotations({
-          identifier: "v2.plugin.reload",
-          summary: "Reload plugin",
-          description: "Reload a configured plugin source without network access after running work finishes.",
-        }),
-      ),
-  )
   .annotateMerge(
     OpenApi.annotations({
       title: "plugin",

packages/schema/src/plugin.ts

@@ -21,13 +21,6 @@ export const Info = Schema.Union([
     source: Source,
     status: Schema.Literal("active"),
     tui: Schema.Boolean,
-    revision: optional(Schema.String).annotate({ description: "Loaded root package version or full Git commit." }),
-    generation: optional(Schema.String).annotate({
-      description: "Opaque loaded module graph identity, local to this runtime.",
-    }),
-    error: optional(Schema.String).annotate({
-      description: "The last replacement failed; the reported revision is still active.",
-    }),
   }),
   Schema.Struct({
     id: ID.pipe(optional),
@@ -35,25 +28,10 @@ export const Info = Schema.Union([
     status: Schema.Literal("failed"),
     error: Schema.String,
     tui: Schema.Boolean,
-    revision: optional(Schema.String).annotate({ description: "Registered root package version or full Git commit." }),
-    generation: optional(Schema.String).annotate({
-      description: "Opaque registered module graph identity, local to this runtime.",
-    }),
   }),
 ]).annotate({ identifier: "Plugin.Info" })
 export type Info = typeof Info.Type
 
-export interface PackageStatus extends Schema.Schema.Type<typeof PackageStatus> {}
-export const PackageStatus = Schema.Struct({
-  installed: optional(Schema.String),
-  available: optional(Schema.String),
-  mutable: Schema.Boolean,
-}).annotate({ identifier: "Plugin.PackageStatus" })
-
-export class OperationError extends Schema.TaggedError<OperationError>()("PluginOperationError", {
-  message: Schema.String,
-}) {}
-
 const Added = ephemeral({
   type: "plugin.added",
   schema: { id: ID },

packages/schema/test/plugin.test.ts

@@ -1,61 +0,0 @@
-import { expect, test } from "bun:test"
-import { Schema } from "effect"
-import { Plugin } from "../src/plugin.js"
-
-test("plugin inventory distinguishes active code from a failed replacement", () => {
-  const info = Schema.decodeUnknownSync(Plugin.Info)({
-    id: "example.plugin",
-    source: { type: "package", package: "example-plugin@latest" },
-    status: "active",
-    tui: true,
-    revision: "1.0.0",
-    generation: "generation-one",
-    error: "Replacement setup failed",
-  })
-  expect(info.status).toBe("active")
-  expect(info.revision).toBe("1.0.0")
-  expect(info.error).toBe("Replacement setup failed")
-  expect(Schema.encodeSync(Plugin.Info)(info)).toEqual(info)
-})
-
-test("plugin revision fields remain optional for existing inventories", () => {
-  expect(
-    Schema.encodeSync(Plugin.Info)({
-      id: Plugin.ID.make("example.plugin"),
-      source: { type: "local", path: "/plugins/example.ts" },
-      status: "active",
-      tui: false,
-      revision: undefined,
-      generation: undefined,
-      error: undefined,
-    }),
-  ).toEqual({
-    id: "example.plugin",
-    source: { type: "local", path: "/plugins/example.ts" },
-    status: "active",
-    tui: false,
-  })
-})
-
-test("package checks omit unknown revisions rather than guessing", () => {
-  expect(
-    Schema.encodeSync(Plugin.PackageStatus)({
-      installed: undefined,
-      available: undefined,
-      mutable: true,
-    }),
-  ).toEqual({ mutable: true })
-  expect(
-    Schema.decodeUnknownSync(Plugin.PackageStatus)({
-      installed: "1.0.0",
-      available: "1.0.0",
-      mutable: false,
-    }),
-  ).toEqual({ installed: "1.0.0", available: "1.0.0", mutable: false })
-})
-
-test("plugin operation errors expose a readable wire message", () => {
-  expect(
-    Schema.encodeSync(Plugin.OperationError)(new Plugin.OperationError({ message: "Unknown plugin source" })),
-  ).toEqual({ _tag: "PluginOperationError", message: "Unknown plugin source" })
-})

packages/sdk/test/embedded.test.ts

@@ -47,11 +47,7 @@ for (const selection of ["explicit", "default"] as const) {
           PluginSupervisor.Service,
           Effect.gen(function* () {
             const plugins = yield* PluginSupervisor.Service
-            return {
-              ...plugins,
-              flush: release.open.pipe(Effect.andThen(plugins.flush)),
-              initialized: release.open.pipe(Effect.andThen(plugins.initialized)),
-            }
+            return { flush: release.open.pipe(Effect.andThen(plugins.flush)) }
           }),
         ).pipe(Layer.provide(PluginSupervisor.layer))
         const opencode = yield* fixture.sdk.OpenCode.create(

packages/server/src/handlers/generate.ts

@@ -1,5 +1,4 @@
 import { Generate } from "@opencode-ai/core/generate"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
 import { Location } from "@opencode-ai/core/location"
 import { LocationServiceMap } from "@opencode-ai/core/location-services"
 import { AbsolutePath } from "@opencode-ai/core/schema"
@@ -28,9 +27,8 @@ export const GenerateHandler = HttpApiBuilder.group(Api, "server.generate", (han
       Effect.fn("server.generate.text")(function* (request) {
         yield* flushPlugins
         const generate = yield* Generate.Service
-        const gate = yield* PluginExecution.Service
-        const text = yield* gate
-          .lease({ id: "generate", admission: true }, generate.text(request.payload))
+        const text = yield* generate
+          .text(request.payload)
           .pipe(
             Effect.mapError((error) =>
               error._tag === "Generate.ModelSelectionError"

packages/server/src/handlers/plugin-readiness.ts

@@ -4,8 +4,7 @@ import { Effect } from "effect"
 
 export function pluginReadiness(error: () => ServiceUnavailableError) {
   return PluginSupervisor.Service.pipe(
-    // Reads may keep observing the coherent active graph while replacement waits for running tools.
-    Effect.flatMap((plugins) => plugins.initialized),
+    Effect.flatMap((plugins) => plugins.flush),
     Effect.timeoutOrElse({
       duration: "5 seconds",
       orElse: () => Effect.fail(error()),

packages/server/src/handlers/plugin.ts

@@ -1,24 +1,13 @@
 import { Plugin } from "@opencode-ai/core/plugin"
-import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor"
 import { Effect } from "effect"
 import { HttpApiBuilder } from "effect/unstable/httpapi"
 import { Api } from "../api"
 import { response } from "../location"
 
 export const PluginHandler = HttpApiBuilder.group(Api, "server.plugin", (handlers) =>
-  handlers
-    .handle("plugin.list", () =>
-      Effect.gen(function* () {
-        return yield* response(Plugin.Service.use((plugin) => plugin.list()))
-      }),
-    )
-    .handle("plugin.check", ({ payload }) =>
-      response(PluginSupervisor.Service.use((plugins) => plugins.check(payload.target))),
-    )
-    .handle("plugin.update", ({ payload }) =>
-      response(PluginSupervisor.Service.use((plugins) => plugins.update(payload.target))),
-    )
-    .handle("plugin.reload", ({ payload }) =>
-      response(PluginSupervisor.Service.use((plugins) => plugins.reload(payload.target))),
-    ),
+  handlers.handle("plugin.list", () =>
+    Effect.gen(function* () {
+      return yield* response(Plugin.Service.use((plugin) => plugin.list()))
+    }),
+  ),
 )

packages/server/src/handlers/pty.ts

@@ -2,7 +2,6 @@ import { Pty } from "@opencode-ai/core/pty"
 import { PtyProtocol } from "@opencode-ai/core/pty/protocol"
 import { PtyTicket } from "@opencode-ai/core/pty/ticket"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor-service"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
 import { Location } from "@opencode-ai/core/location"
 import { Effect, Queue } from "effect"
 import { HttpServerRequest, HttpServerResponse } from "effect/unstable/http"
@@ -42,25 +41,19 @@ export const PtyHandler = HttpApiBuilder.group(Api, "server.pty", (handlers) =>
         "pty.create",
         Effect.fn(function* (ctx) {
           const plugins = yield* PluginSupervisor.Service
-          yield* plugins.initialized
-          const gate = yield* PluginExecution.Service
-          return yield* gate.lease(
-            { id: "pty", admission: true },
-            Effect.gen(function* () {
-              const pty = yield* Pty.Service
-              const location = yield* Location.Service
-              const cwd = ctx.payload.cwd || location.directory
-              return yield* response(
-                pty.create({
-                  ...ctx.payload,
-                  args: ctx.payload.args ? [...ctx.payload.args] : undefined,
-                  cwd,
-                  env: {
-                    ...ctx.payload.env,
-                    ...(yield* environment.get({ directory: location.directory, cwd })),
-                  },
-                }),
-              )
+          yield* plugins.flush
+          const pty = yield* Pty.Service
+          const location = yield* Location.Service
+          const cwd = ctx.payload.cwd || location.directory
+          return yield* response(
+            pty.create({
+              ...ctx.payload,
+              args: ctx.payload.args ? [...ctx.payload.args] : undefined,
+              cwd,
+              env: {
+                ...ctx.payload.env,
+                ...(yield* environment.get({ directory: location.directory, cwd })),
+              },
             }),
           )
         }),

packages/server/src/handlers/shell.ts

@@ -1,7 +1,6 @@
 import { Shell } from "@opencode-ai/core/shell"
 import { Location } from "@opencode-ai/core/location"
 import { PluginSupervisor } from "@opencode-ai/core/plugin/supervisor-service"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
 import { Effect } from "effect"
 import { HttpApiBuilder, HttpApiSchema } from "effect/unstable/httpapi"
 import { ShellNotFoundError } from "@opencode-ai/protocol/errors"
@@ -22,15 +21,11 @@ export const ShellHandler = HttpApiBuilder.group(Api, "server.shell", (handlers)
         "shell.create",
         Effect.fn(function* (ctx) {
           const plugins = yield* PluginSupervisor.Service
-          yield* plugins.initialized
-          const gate = yield* PluginExecution.Service
+          yield* plugins.flush
           const shell = yield* Shell.Service
           const location = yield* Location.Service
           return yield* response(
-            gate.lease(
-              { id: "shell", admission: true },
-              shell.create({ ...ctx.payload, cwd: ctx.payload.cwd || location.directory }).pipe(Effect.orDie),
-            ),
+            shell.create({ ...ctx.payload, cwd: ctx.payload.cwd || location.directory }).pipe(Effect.orDie),
           )
         }),
       )

packages/server/src/handlers/websearch.ts

@@ -1,5 +1,4 @@
 import { WebSearch } from "@opencode-ai/core/websearch"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
 import { InvalidRequestError, ServiceUnavailableError } from "@opencode-ai/protocol/errors"
 import { Effect } from "effect"
 import { HttpApiBuilder } from "effect/unstable/httpapi"
@@ -31,9 +30,8 @@ export const WebSearchHandler = HttpApiBuilder.group(Api, "server.websearch", (h
         Effect.fn("server.websearch.query")(function* (request) {
           yield* awaitPlugins
           const websearch = yield* WebSearch.Service
-          const gate = yield* PluginExecution.Service
           return yield* response(
-            gate.lease({ id: "websearch", admission: true }, websearch.query(request.payload)).pipe(
+            websearch.query(request.payload).pipe(
               Effect.catchTags({
                 "WebSearch.ProviderRequired": () =>
                   new InvalidRequestError({

packages/server/test/handler-policy.test.ts

@@ -49,8 +49,8 @@ test("plugin readiness stays lazy and resolves the supervisor for every executio
   const readiness = pluginReadiness(
     () => new ServiceUnavailableError({ message: "initialization timed out", service: "test" }),
   )
-  const layer = Layer.mock(PluginSupervisor.Service, {
-    initialized: Effect.sync(() => {
+  const layer = Layer.succeed(PluginSupervisor.Service, {
+    flush: Effect.sync(() => {
       flushes++
     }),
   })
@@ -59,11 +59,3 @@ test("plugin readiness stays lazy and resolves the supervisor for every executio
   await Effect.runPromise(Effect.all([readiness, readiness], { concurrency: 1 }).pipe(Effect.provide(layer)))
   expect(flushes).toBe(2)
 })
-
-test("plugin state reads do not wait for a pending replacement", async () => {
-  const readiness = pluginReadiness(
-    () => new ServiceUnavailableError({ message: "initialization timed out", service: "test" }),
-  )
-  const layer = Layer.mock(PluginSupervisor.Service, { initialized: Effect.void, flush: Effect.never })
-  expect(await Effect.runPromise(readiness.pipe(Effect.as("active"), Effect.provide(layer)))).toBe("active")
-})

packages/server/test/plugin-execution.test.ts

@@ -1,154 +0,0 @@
-import { expect } from "bun:test"
-import { Context, Deferred, Effect, Fiber, Latch, Layer } from "effect"
-import { define } from "@opencode-ai/plugin/effect/plugin"
-import { Bus } from "@opencode-ai/core/bus"
-import { ConfigPluginSource } from "@opencode-ai/core/config/plugin/source"
-import { Generate } from "@opencode-ai/core/generate"
-import { PluginExecution } from "@opencode-ai/core/plugin/execution"
-import { SdkPlugins } from "@opencode-ai/core/plugin/sdk"
-import { WebSearch } from "@opencode-ai/core/websearch"
-import { makeGlobalNode, makeLocationNode } from "@opencode-ai/util/effect/app-node"
-import { tmpdir } from "../../core/test/fixture/tmpdir"
-import { it } from "../../core/test/lib/effect"
-import { ServerFetch } from "../src/fetch"
-
-for (const endpoint of ["websearch", "generate"]) {
-  it.live(`${endpoint} HTTP execution retains plugin resources through completion`, () =>
-    Effect.gen(function* () {
-      const tmp = yield* Effect.acquireDisposable(Effect.promise(() => tmpdir("opencode-plugin-execution-")))
-      const sdkReady = yield* Deferred.make<SdkPlugins.Interface>()
-      const queryStarted = yield* Latch.make()
-      const finishQuery = yield* Latch.make()
-      const activationRequested = yield* Latch.make()
-      const admissionRequested = yield* Latch.make()
-      const activationStarted = yield* Latch.make()
-      const finishActivation = yield* Latch.make()
-      const events: string[] = []
-      const definition = (version: number) =>
-        define({
-          id: "executor-resource",
-          effect: (ctx) =>
-            Effect.gen(function* () {
-              const resource = { closed: false }
-              yield* Effect.addFinalizer(() =>
-                Effect.sync(() => {
-                  resource.closed = true
-                  events.push(`closed:${version}`)
-                }),
-              )
-              if (version === 2) {
-                yield* activationStarted.open
-                yield* finishActivation.await
-              }
-              yield* ctx.websearch.transform((draft) =>
-                draft.add({
-                  id: "leased-provider",
-                  name: "Leased provider",
-                  execute: () =>
-                    Effect.gen(function* () {
-                      if (version === 1) {
-                        yield* queryStarted.open
-                        yield* finishQuery.await
-                      }
-                      expect(resource.closed).toBe(false)
-                      events.push(`query:${version}`)
-                      return []
-                    }),
-                }),
-              )
-            }),
-        })
-      const sdkNode = makeGlobalNode({
-        service: SdkPlugins.Service,
-        layer: SdkPlugins.layer.pipe(
-          Layer.tap((context) => {
-            const sdk = Context.get(context, SdkPlugins.Service)
-            return Deferred.succeed(sdkReady, sdk).pipe(Effect.andThen(sdk.register(definition(1))))
-          }),
-        ),
-        deps: [Bus.node],
-      })
-      const executionNode = makeLocationNode({
-        service: PluginExecution.Service,
-        layer: Layer.effect(
-          PluginExecution.Service,
-          Effect.gen(function* () {
-            const gate = yield* PluginExecution.Service
-            return PluginExecution.Service.of({
-              lease: (session, effect) => admissionRequested.open.pipe(Effect.andThen(gate.lease(session, effect))),
-              exclusive: (effect) => activationRequested.open.pipe(Effect.andThen(gate.exclusive(effect))),
-            })
-          }),
-        ).pipe(Layer.provide(PluginExecution.layer)),
-        deps: [],
-      })
-      // The Generate handler executes a real plugin provider without contacting an LLM.
-      const generateNode = makeLocationNode({
-        service: Generate.Service,
-        layer: Layer.effect(
-          Generate.Service,
-          Effect.gen(function* () {
-            const websearch = yield* WebSearch.Service
-            return Generate.Service.of({
-              text: () =>
-                websearch
-                  .query({
-                    providerID: WebSearch.ID.make("leased-provider"),
-                    query: "generate",
-                  })
-                  .pipe(Effect.as("generated"), Effect.orDie),
-            })
-          }),
-        ),
-        deps: [WebSearch.node],
-      })
-      const handler = yield* ServerFetch.make(
-        {
-          database: { path: ":memory:" },
-          config: { directory: tmp.path, project: false },
-          fs: { filewatcher: false },
-        },
-        {
-          overrides: [
-            [SdkPlugins.node, sdkNode],
-            [PluginExecution.node, executionNode],
-            [ConfigPluginSource.node, ConfigPluginSource.empty],
-            [Generate.node, generateNode],
-          ],
-        },
-      )
-      const sdk = yield* Deferred.await(sdkReady)
-      const request = Effect.promise(() => {
-        const url = new URL(`http://opencode.local/api/${endpoint}`)
-        url.searchParams.set("location[directory]", tmp.path)
-        return handler(
-          new Request(url, {
-            method: "POST",
-            headers: { "content-type": "application/json" },
-            body: JSON.stringify(
-              endpoint === "generate" ? { prompt: "hello" } : { providerID: "leased-provider", query: "hello" },
-            ),
-          }),
-        )
-      })
-      const first = yield* request.pipe(Effect.forkScoped({ startImmediately: true }))
-      yield* Effect.addFinalizer(() => finishQuery.open.pipe(Effect.andThen(finishActivation.open)))
-      yield* queryStarted.await
-      yield* activationRequested.close
-      yield* sdk.register(definition(2))
-      yield* activationRequested.await
-      expect(events).toEqual([])
-      yield* finishQuery.open
-      expect((yield* Fiber.join(first)).status).toBe(200)
-      yield* activationStarted.await
-      expect(events).toEqual(["query:1", "closed:1"])
-      yield* admissionRequested.close
-      const second = yield* request.pipe(Effect.forkScoped({ startImmediately: true }))
-      yield* admissionRequested.await
-      expect(events).toEqual(["query:1", "closed:1"])
-      yield* finishActivation.open
-      expect((yield* Fiber.join(second)).status).toBe(200)
-      expect(events).toEqual(["query:1", "closed:1", "query:2"])
-    }),
-  )
-}

packages/server/test/plugin.test.ts

@@ -1,113 +0,0 @@
-import fs from "node:fs/promises"
-import path from "node:path"
-import { expect } from "bun:test"
-import { Effect, Schema } from "effect"
-import { Location } from "@opencode-ai/schema/location"
-import { Plugin } from "@opencode-ai/schema/plugin"
-import { tmpdir } from "../../core/test/fixture/tmpdir"
-import { it } from "../../core/test/lib/effect"
-import { startServer } from "./fixture/server"
-
-it.live("checks and reloads only configured sources, preserving working code after import and setup failures", () =>
-  Effect.gen(function* () {
-    const tmp = yield* Effect.acquireDisposable(Effect.promise(() => tmpdir("opencode-plugin-endpoint-")))
-    const global = path.join(tmp.path, "global")
-    const project = path.join(tmp.path, "project")
-    const target = path.join(project, "plugin.ts")
-    const disabled = path.join(project, "disabled.ts")
-    yield* Effect.promise(async () => {
-      await fs.mkdir(global)
-      await fs.mkdir(project)
-      await fs.writeFile(target, `export default { id: "managed", tui: true, setup() {} }`)
-      await fs.writeFile(
-        disabled,
-        `export default { id: "disabled", setup() { throw new Error("must remain disabled") } }`,
-      )
-      await fs.writeFile(
-        path.join(project, "opencode.json"),
-        JSON.stringify({ plugins: ["-*", target, disabled, "-disabled"] }),
-      )
-    })
-    const server = yield* startServer(global)
-    const invoke = (action: string, source: string) =>
-      Effect.promise(async () => {
-        const url = new URL(`/api/plugin/${action}`, server.base)
-        url.searchParams.set("location[directory]", project)
-        const response = await fetch(url, {
-          method: "POST",
-          headers: { ...server.headers, "content-type": "application/json" },
-          body: JSON.stringify({ target: source }),
-        })
-        const body: unknown = await response.json()
-        return { status: response.status, body }
-      })
-    const check = yield* invoke("check", target)
-    expect(check.status).toBe(200)
-    expect(Schema.decodeUnknownSync(Location.response(Plugin.PackageStatus))(check.body).data).toEqual({
-      mutable: false,
-    })
-    const first = yield* invoke("reload", target)
-    expect(first.status).toBe(200)
-    const initial = Schema.decodeUnknownSync(Location.response(Schema.Array(Plugin.Info)))(first.body).data
-    expect(initial).toEqual([
-      expect.objectContaining({ id: "managed", status: "active", tui: true, generation: expect.any(String) }),
-    ])
-
-    yield* Effect.promise(() =>
-      fs.writeFile(target, `export default { id: "managed", setup() { throw new Error("setup failed") } }`),
-    )
-    const setup = yield* invoke("reload", target)
-    expect(setup.status).toBe(200)
-    expect(Schema.decodeUnknownSync(Location.response(Schema.Array(Plugin.Info)))(setup.body).data).toEqual([
-      { ...initial[0], error: expect.stringContaining("setup failed") },
-    ])
-    yield* Effect.promise(() =>
-      fs.writeFile(target, `import "./missing.ts"; export default { id: "managed", setup() {} }`),
-    )
-    const imported = yield* invoke("reload", target)
-    expect(imported.status).toBe(200)
-    expect(Schema.decodeUnknownSync(Location.response(Schema.Array(Plugin.Info)))(imported.body).data).toEqual([
-      { ...initial[0], error: expect.stringContaining("missing.ts") },
-    ])
-    yield* Effect.promise(() =>
-      fs.writeFile(
-        target,
-        `export default { id: "changed-id", setup() { throw new Error("new setup must not run") } }`,
-      ),
-    )
-    const renamed = yield* invoke("reload", target)
-    expect(renamed.status).toBe(200)
-    expect(Schema.decodeUnknownSync(Location.response(Schema.Array(Plugin.Info)))(renamed.body).data).toEqual([
-      { ...initial[0], error: expect.stringContaining("Plugin ID changed from managed to changed-id") },
-    ])
-    const off = yield* invoke("reload", disabled)
-    expect(off.status).toBe(200)
-    expect(
-      Schema.decodeUnknownSync(Location.response(Schema.Array(Plugin.Info)))(off.body).data.map((item) => item.id),
-    ).toEqual([Plugin.ID.make("managed")])
-
-    yield* Effect.promise(() => fs.writeFile(target, `export default { id: "managed", tui: true, setup() {} }`))
-    const replacements = yield* Effect.all([invoke("reload", target), invoke("reload", target)], {
-      concurrency: "unbounded",
-    })
-    const generations = replacements.map((result) => {
-      expect(result.status).toBe(200)
-      const info = Schema.decodeUnknownSync(Location.response(Schema.Array(Plugin.Info)))(result.body).data[0]
-      expect(info?.status).toBe("active")
-      expect(info?.error).toBeUndefined()
-      return info?.generation
-    })
-    expect(new Set(generations).size).toBe(2)
-    expect(generations).not.toContain(initial[0]?.generation)
-    for (const operation of [
-      { action: "update", source: target },
-      { action: "reload", source: "opencode.agent" },
-      { action: "update", source: "not-configured@latest" },
-      { action: "check", source: "managed" },
-    ]) {
-      const rejected = yield* invoke(operation.action, operation.source)
-      expect(rejected.status).toBe(400)
-      expect(Schema.decodeUnknownSync(Plugin.OperationError)(rejected.body)._tag).toBe("PluginOperationError")
-    }
-  }),
-)

packages/session-ui/component-tests/file.spec.ts

@@ -0,0 +1,35 @@
+import { expect, story } from "../../storybook/playwright/story"
+
+for (const split of [false, true]) {
+  for (const theme of ["light", "dark"]) {
+    story(`highlights changed words in ${split ? "split" : "unified"} ${theme} diffs`, async ({ mount }) => {
+      const root = await mount("components-session-review--inline-changes", { args: { split }, globals: { theme } })
+      const diffs = root.locator("diffs-container")
+      await expect(diffs).toHaveCount(2)
+      for (const diff of await diffs.all()) {
+        await expect(diff.locator('[data-line] [style*="--syntax-"]')).not.toHaveCount(0)
+      }
+      const additions = root.locator('[data-line-type="change-addition"] [data-diff-span]')
+      await expect(additions).toHaveText(["select-text"])
+      await expect(root.locator('[data-line-type="context"] [data-diff-span]')).toHaveCount(0)
+      await expect(root.locator('[data-line-type="change-deletion"] [data-diff-span]')).toHaveText([
+        '"http" in',
+        "? error.reason.",
+        "response?.",
+        ": undefined",
+      ])
+      await expect(additions).not.toHaveCSS("background-color", "rgba(0, 0, 0, 0)")
+    })
+  }
+
+  for (const source of ["files", "metadata"]) {
+    story(`skips word diffs for large ${split ? "split" : "unified"} ${source}`, async ({ mount }) => {
+      const root = await mount("components-session-review--large-file", { args: { split, source } })
+      const line = root.locator('[data-line][data-line-type="change-addition"]')
+      await expect(line).toHaveText("export const value = 'after'")
+      // Plain first paint is not proof that the worker kept inline diffs disabled.
+      await expect(line.locator('[style*="--syntax-"]')).not.toHaveCount(0)
+      await expect(root.locator("[data-diff-span]")).toHaveCount(0)
+    })
+  }
+}

packages/session-ui/component-tests/session-review-comments.spec.ts

@@ -4,7 +4,7 @@ import { expect, story } from "../../storybook/playwright/story"
 story("opens the comment editor when code is clicked", async ({ mount }) => {
   const root = await mount("components-session-review--interactive-comments")
   const review = root.locator('[data-component="session-review"]')
-  await review.getByText("export const value = 'after'", { exact: true }).click()
+  await review.locator('[data-line-type="change-addition"] [data-diff-span]').click()
   await expect(review.getByRole("textbox")).toBeVisible()
   await expect(review.locator('[data-slot="line-comment-editor-label"]')).toHaveText("Commenting on line 2")
 })

packages/session-ui/src/components/file.tsx

@@ -906,7 +906,7 @@ function TextViewer<T>(props: TextFileProps<T>) {
 
   createEffect(() => {
     const opts = options()
-    const workerPool = getWorkerPool("unified")
+    const workerPool = getWorkerPool()
     const virtualizer = virtuals.get()
 
     renderViewer({
@@ -1111,7 +1111,8 @@ function DiffViewer<T>(props: DiffFileProps<T>) {
 
   createEffect(() => {
     const opts = options()
-    const workerPool = large() ? getWorkerPool("unified") : getWorkerPool(props.diffStyle)
+    // Worker render options override per-viewer options, including the large-file fallback.
+    const workerPool = getWorkerPool(large() ? "none" : "word-alt")
     const virtualizer = virtuals.get()
     const beforeContents = typeof local.before?.contents === "string" ? local.before.contents : ""
     const afterContents = typeof local.after?.contents === "string" ? local.after.contents : ""

packages/session-ui/src/components/session-review.stories.tsx

@@ -1,6 +1,8 @@
 import { createStore } from "solid-js/store"
+import { parseDiffFromFile } from "@pierre/diffs"
 import { CurrentSessionProviders } from "../storybook/current-session-story"
 import { editThenTestDocument, reviewDiffs } from "../storybook/current-session-fixtures"
+import { File } from "./file"
 import { SessionReview, type SessionReviewComment } from "./session-review"
 
 function ReviewStory(props: { split?: boolean }) {
@@ -77,3 +79,79 @@ function InteractiveCommentsStory() {
 }
 
 export const InteractiveComments = { render: () => <InteractiveCommentsStory /> }
+
+const gitDiffs = [
+  {
+    // OpenCode 93e1f383dd79683af4fc5ad139cea0516603c838, unchanged git-show output.
+    file: "packages/session-ui/src/components/file.tsx",
+    additions: 1,
+    deletions: 1,
+    patch: `diff --git a/packages/session-ui/src/components/file.tsx b/packages/session-ui/src/components/file.tsx
+index 704971b014..4876731cbd 100644
+--- a/packages/session-ui/src/components/file.tsx
++++ b/packages/session-ui/src/components/file.tsx
+@@ -702,7 +702,7 @@ function ViewerShell(props: {
+       data-mode={props.mode}
+       dir="ltr"
+       style={styleVariables}
+-      class="relative outline-none"
++      class="relative select-text outline-none"
+       classList={{
+         ...props.classList,
+         [props.class ?? ""]: !!props.class,
+`,
+  },
+  {
+    // OpenCode 497a24c17d, unchanged git-show output.
+    file: "packages/core/src/session/runner/retry.ts",
+    additions: 1,
+    deletions: 1,
+    patch: `diff --git a/packages/core/src/session/runner/retry.ts b/packages/core/src/session/runner/retry.ts
+index 10f6680097..ef26792ffe 100644
+--- a/packages/core/src/session/runner/retry.ts
++++ b/packages/core/src/session/runner/retry.ts
+@@ -15,7 +15,7 @@ export interface Input {
+ }
+\x20
+ export function isRetryable(error: AIError) {
+-  const override = "http" in error.reason ? error.reason.http?.response?.headers["x-should-retry"] : undefined
++  const override = error.reason.http?.headers["x-should-retry"]
+   if (override === "true") return true
+   if (override === "false") return false
+   switch (error.reason._tag) {
+`,
+  },
+]
+
+export const InlineChanges = {
+  args: { split: false },
+  render: (args: { split: boolean }) => (
+    <CurrentSessionProviders document={editThenTestDocument}>
+      <div class="mx-auto h-screen min-h-[620px] w-full max-w-[1100px] overflow-hidden bg-background-base">
+        <SessionReview
+          title="OpenCode Git history"
+          diffs={gitDiffs}
+          open={gitDiffs.map((diff) => diff.file)}
+          split={args.split}
+        />
+      </div>
+    </CurrentSessionProviders>
+  ),
+}
+
+export const LargeFile = {
+  args: { split: false, source: "files" },
+  argTypes: { source: { control: "select", options: ["files", "metadata"] } },
+  render: (args: { split: boolean; source: string }) => {
+    // Cross the viewer's 500,000-character limit without long changed lines or 1,000 total lines.
+    const padding = `// ${"unchanged ".repeat(70)}\n`.repeat(800)
+    const before = { name: "large.ts", contents: `export const value = 'before'\n${padding}` }
+    const after = { name: "large.ts", contents: `export const value = 'after'\n${padding}` }
+    const input = args.source === "metadata" ? { fileDiff: parseDiffFromFile(before, after) } : { before, after }
+    return (
+      <div class="h-screen overflow-auto bg-background-base">
+        <File mode="diff" {...input} diffStyle={args.split ? "split" : "unified"} />
+      </div>
+    )
+  },
+}

packages/session-ui/src/pierre/index.ts

@@ -197,7 +197,7 @@ export function createDefaultOptions<T>(style: FileDiffOptions<T>["diffStyle"])
     disableBackground: false,
     expansionLineCount: 20,
     hunkSeparators: "line-info-basic",
-    lineDiffType: style === "split" ? "word-alt" : "none",
+    lineDiffType: "word-alt",
     maxLineDiffLength: 1000,
     maxLineLengthForHighlighting: 1000,
     disableFileHeader: true,

packages/session-ui/src/pierre/worker.ts

@@ -4,8 +4,6 @@ import { registerOpenCodeTheme } from "@opencode-ai/ui/context/marked-theme-regi
 
 registerOpenCodeTheme()
 
-export type WorkerPoolStyle = "unified" | "split"
-
 export function workerFactory(): Worker {
   return new Worker(ShikiWorkerUrl, { type: "module" })
 }
@@ -32,24 +30,25 @@ function createPool(lineDiffType: "none" | "word-alt") {
   return pool
 }
 
-let unified: WorkerPoolManager | undefined
-let split: WorkerPoolManager | undefined
+let plain: WorkerPoolManager | undefined
+let diff: WorkerPoolManager | undefined
 
-export function getWorkerPool(style: WorkerPoolStyle | undefined): WorkerPoolManager | undefined {
+export function getWorkerPool(lineDiffType: "none" | "word-alt" = "word-alt"): WorkerPoolManager | undefined {
   if (typeof window === "undefined") return
 
-  if (style === "split") {
-    if (!split) split = createPool("word-alt")
-    return split
+  if (lineDiffType === "none") {
+    if (!plain) plain = createPool("none")
+    return plain
   }
 
-  if (!unified) unified = createPool("none")
-  return unified
+  if (!diff) diff = createPool("word-alt")
+  return diff
 }
 
 export function getWorkerPools() {
+  const pool = getWorkerPool()
   return {
-    unified: getWorkerPool("unified"),
-    split: getWorkerPool("split"),
+    unified: pool,
+    split: pool,
   }
 }

packages/session-ui/src/v2/components/session-review-v2.tsx

@@ -152,7 +152,7 @@ export function SessionReviewV2(props: SessionReviewV2Props) {
   const locale = useLocale()
 
   createEffect(() => {
-    getWorkerPool(props.diffStyle)
+    getWorkerPool()
   })
 
   const fileIndex = () => {

packages/tui/src/component/session-tabs.tsx

@@ -1,4 +1,4 @@
-import { RGBA, ScrollBoxRenderable, TextAttributes, type MouseEvent } from "@opentui/core"
+import { BoxRenderable, RGBA, ScrollBoxRenderable, TextAttributes, type MouseEvent } from "@opentui/core"
 import {
   For,
   Index,
@@ -398,7 +398,16 @@ function TabContextMenu(props: { state: TabContextMenuState; tabs: SessionTabsCo
   }
 
   return (
-    <Portal>
+    <Portal
+      ref={(container) => {
+        if (!(container instanceof BoxRenderable)) return
+        // Portal's wrapper otherwise follows the full-height app in root layout.
+        container.position = "absolute"
+        container.left = 0
+        container.top = 0
+        container.zIndex = 2500
+      }}
+    >
       <box
         position="absolute"
         left={0}

packages/tui/src/config/keybind.ts

@@ -66,21 +66,26 @@ export const Definitions = {
   "diff.up": keybind("k,up", "Move diff viewer up"),
   "diff.page.down": keybind("pagedown,ctrl+f", "Page diff viewer down"),
   "diff.page.up": keybind("pageup,ctrl+b", "Page diff viewer up"),
-  "diff.toggle": keybind("enter,space", "Toggle diff viewer item"),
-  "diff.expand": keybind("right", "Expand diff viewer item"),
-  "diff.expand_all": keybind("E", "Expand all diff viewer folders"),
-  "diff.collapse": keybind("left", "Collapse diff viewer item"),
-  "diff.switch_focus": keybind("tab", "Switch diff viewer focus"),
+  "diff.half_page.down": keybind("ctrl+d", "Scroll diff viewer down half a page"),
+  "diff.half_page.up": keybind("ctrl+u", "Scroll diff viewer up half a page"),
+  "diff.first": keybind("gg,home", "Go to the start of the diff"),
+  "diff.last": keybind("shift+g,end", "Go to the end of the diff"),
+  // Retain shipped configuration names without registering the removed tree navigation commands.
+  "diff.toggle": keybind("none", "Deprecated: file tree is mouse-controlled"),
+  "diff.expand": keybind("none", "Deprecated: file tree is mouse-controlled"),
+  "diff.expand_all": keybind("none", "Deprecated: file tree is mouse-controlled"),
+  "diff.collapse": keybind("none", "Deprecated: file tree is mouse-controlled"),
+  "diff.switch_focus": keybind("none", "Deprecated: keyboard navigation always controls the diff"),
   "diff.next_hunk": keybind("]", "Jump to next diff hunk"),
   "diff.previous_hunk": keybind("[", "Jump to previous diff hunk"),
-  "diff.next_file": keybind("n", "Jump to next diff file"),
-  "diff.previous_file": keybind("p", "Jump to previous diff file"),
+  "diff.next_file": keybind("n,alt+down", "Jump to next diff file"),
+  "diff.previous_file": keybind("p,alt+up", "Jump to previous diff file"),
   "diff.toggle_file_tree": keybind("b", "Toggle diff viewer file tree"),
   "diff.single_patch": keybind("s", "Toggle single patch view"),
   "diff.switch_source": keybind("d", "Switch diff viewer source"),
   "diff.toggle_view": keybind("v", "Toggle diff viewer split or unified view"),
   "diff.mark_reviewed": keybind("m", "Toggle selected diff file reviewed"),
-  "diff.help": keybind("?", "Show more diff viewer shortcuts"),
+  "diff.help": keybind("?,shift+?,shift+/", "Show more diff viewer shortcuts"),
 
   "prompt.editor": keybind("<leader>e", "Open external editor"),
   "theme.switch": keybind("<leader>t", "List available themes"),
@@ -264,7 +269,6 @@ export const Definitions = {
   "prompt.autocomplete.complete": keybind("tab", "Complete autocomplete item"),
   "permission.prompt.fullscreen": keybind("ctrl+f", "Toggle permission prompt fullscreen"),
   "plugins.toggle": keybind("space", "Toggle plugin"),
-  "plugins.check": keybind("ctrl+r", "Check plugin updates"),
   "dialog.mcp.toggle": keybind("space", "Toggle MCP server"),
   "dialog.plugins.install": keybind("shift+i", "Install plugin from plugin dialog"),
 

packages/tui/src/feature-plugins/system/diff-viewer-file-tree-utils.ts

@@ -1,8 +1,3 @@
-// Paths branch softly through the screen,
-// A quiet tree of changed designs;
-// Each leaf remembers what has been,
-// And waits where careful light aligns.
-
 export type FileTreeItem = {
   readonly file: string
   readonly status?: "added" | "deleted" | "modified"
@@ -119,44 +114,20 @@ export function compareFileTreeNodes(tree: FileTree, left: number, right: number
   return left - right
 }
 
-export function moveFileTreeSelection(rows: readonly FileTreeRow[], selected: number | undefined, offset: number) {
-  if (rows.length === 0) return undefined
-  const index = selected === undefined ? -1 : rows.findIndex((row) => row.id === selected)
-  if (index === -1) return rows[0]!.id
-  return rows[Math.max(0, Math.min(rows.length - 1, index + offset))]!.id
-}
-
-export function moveFileTreeSelectionToFirstChild(rows: readonly FileTreeRow[], selected: number | undefined) {
-  const index = selected === undefined ? -1 : rows.findIndex((row) => row.id === selected)
-  const row = index === -1 ? undefined : rows[index]
-  if (row?.kind !== "directory") return selected
-  const child = rows[index + 1]
-  return child && child.depth > row.depth ? child.id : selected
-}
-
-export function moveFileTreeSelectionToParent(rows: readonly FileTreeRow[], selected: number | undefined) {
-  const index = selected === undefined ? -1 : rows.findIndex((row) => row.id === selected)
-  const row = index === -1 ? undefined : rows[index]
-  if (!row || row.depth === 0) return selected
-  return rows.findLast((item, itemIndex) => itemIndex < index && item.depth < row.depth)?.id ?? selected
-}
-
 export function fileTreeFileSelection(tree: FileTree, fileIndex: number) {
   const node = tree.nodes.find((item) => item.kind === "file" && item.fileIndex === fileIndex)
   if (!node) return undefined
   return {
-    highlightedNode: node.id,
     expandedNodes: fileTreeParentDirectories(tree, node.id),
   }
 }
 
 export function singlePatchFileIndex(
   selected: number | undefined,
-  active: number | undefined,
   current: number | undefined,
   first: number | undefined,
 ) {
-  return selected ?? active ?? current ?? first
+  return selected ?? current ?? first
 }
 
 export function orderedPatchFileIndexes(rows: readonly FileTreeRow[]) {
@@ -186,19 +157,6 @@ export function toggleFileTreeDirectory(tree: FileTree, expanded: ReadonlySet<nu
   return next
 }
 
-export function setFileTreeDirectoryExpanded(
-  tree: FileTree,
-  expanded: ReadonlySet<number>,
-  selected: number | undefined,
-  value: boolean,
-) {
-  if (selected === undefined || tree.nodes[selected]?.kind !== "directory") return expanded
-  const next = new Set(expanded)
-  if (value) next.add(selected)
-  else next.delete(selected)
-  return next
-}
-
 function addFileTreeNode(nodes: FileTreeNode[], roots: number[], input: Omit<FileTreeNode, "id" | "children">) {
   const id = nodes.length
   nodes.push({ ...input, id, children: [] })

packages/tui/src/feature-plugins/system/diff-viewer-file-tree.tsx

@@ -1,156 +1,259 @@
 /** @jsxImportSource @opentui/solid */
-import type { ScrollBoxRenderable } from "@opentui/core"
-import type { Plugin } from "@opencode-ai/plugin/tui"
-import { Locale } from "../../util/locale"
+import { MouseButton, TextAttributes, type MouseEvent, type ScrollBoxRenderable } from "@opentui/core"
+import { truncateFilePath } from "../../ui/file-path"
+import { stringWidth } from "../../util/string-width"
+import { useTheme } from "../../context/theme"
 import { tint } from "../../theme/color"
-import { createEffect, createMemo, For, Match, Switch } from "solid-js"
+import { createEffect, createMemo, createSignal, For, Match, Show, Switch, type JSX } from "solid-js"
 import { buildFileTree, flattenFileTree, type FileTreeItem, type FileTreeRow } from "./diff-viewer-file-tree-utils"
-import { Panel } from "./diff-viewer-ui"
 
-const FILE_TREE_STATUS_WIDTH = 2
+const FILE_TREE_STATUS_WIDTH = 1
 
 export type DiffViewerFileTreeProps = {
-  readonly context: Plugin.Context
   readonly width: number
   readonly files: readonly FileTreeItem[]
   readonly loading: boolean
   readonly error: unknown
-  readonly focused?: boolean
-  readonly highlightedNode?: number
+  readonly layout?: "tree" | "list"
   readonly selectedFileIndex?: number
   readonly reviewedFileNames?: ReadonlySet<string>
   readonly expandedNodes?: ReadonlySet<number>
   readonly onRowClick?: (row: FileTreeRow) => void
+  readonly onFileContextMenu?: (fileIndex: number, event: MouseEvent) => void
+  readonly source?: string
+  readonly onSwitchSource?: () => void
+  readonly footer?: JSX.Element
 }
 
 export function DiffViewerFileTree(props: DiffViewerFileTreeProps) {
-  const theme = props.context.theme
+  const theme = useTheme("elevated")
+  const [sourceHovered, setSourceHovered] = createSignal(false)
+  const list = () => props.layout === "list"
   const tree = createMemo(() => buildFileTree(props.files))
-  const rows = createMemo(() => flattenFileTree(tree(), props.expandedNodes))
+  const rows = createMemo(() =>
+    list()
+      ? flattenFileTree(tree()).filter((row) => row.fileIndex !== undefined)
+      : flattenFileTree(tree(), props.expandedNodes),
+  )
+  // Quieter than subdued text: markers are affordances, not content.
+  const faint = createMemo(() => tint(theme.text.subdued, theme.background.default, 0.45))
+  // Rails are pure texture; keep them barely above the surface.
+  const rail = createMemo(() => tint(theme.text.subdued, theme.background.default, 0.7))
+  const reviewedCount = createMemo(() => props.files.filter((file) => props.reviewedFileNames?.has(file.file)).length)
+  const contentWidth = () => Math.max(0, props.width - 4 - FILE_TREE_STATUS_WIDTH - 1)
   let scroll: ScrollBoxRenderable | undefined
 
   createEffect(() => {
-    const node = props.highlightedNode
-    if (node === undefined) return
-    const selectedIndex = rows().findIndex((row) => row.id === node)
-    if (selectedIndex === -1) return
-    const scrollSelectedIntoView = () => scrollFileTreeRowIntoView(scroll, selectedIndex)
+    const index = rows().findIndex((row) => row.fileIndex !== undefined && row.fileIndex === props.selectedFileIndex)
+    if (index === -1) return
+    const top = index * (list() ? 3 : 1)
+    const height = list() ? 2 : 1
+    const scrollSelectedIntoView = () => scrollFileTreeRowIntoView(scroll, top, height)
     scrollSelectedIntoView()
     requestAnimationFrame(scrollSelectedIntoView)
   })
 
-  const fadedColor = () => tint(theme.text.default, theme.background.default, 0.75)
-
   return (
-    <Panel border="both" width={props.width} context={props.context}>
-      <scrollbox
-        ref={(element: ScrollBoxRenderable) => (scroll = element)}
-        verticalScrollbarOptions={{ visible: false }}
-        horizontalScrollbarOptions={{ visible: false }}
+    <box width={props.width} height="100%" minWidth={0} minHeight={0} flexShrink={0} flexDirection="column">
+      <box id="diff-tree-top-edge" height={1} flexShrink={0} backgroundColor={theme.background.default} />
+      <box
+        flexGrow={1}
+        minWidth={0}
+        minHeight={0}
+        paddingBottom={1}
+        paddingLeft={2}
+        paddingRight={2}
+        backgroundColor={theme.background.default}
       >
-        <Switch>
-          <Match when={props.loading || props.error}>
-            <text />
-          </Match>
-          <Match when={props.files.length === 0}>
-            <text fg={theme.text.default}>No files</text>
-          </Match>
-          <Match when={props.files.length > 0}>
-            <For each={rows()}>
-              {(row, index) => {
-                const highlighted = () => props.focused && props.highlightedNode === row.id
-                const selected = () => row.fileIndex !== undefined && props.selectedFileIndex === row.fileIndex
-                const reviewed = () => {
-                  const file = row.fileIndex === undefined ? undefined : props.files[row.fileIndex]?.file
-                  return file !== undefined && (props.reviewedFileNames?.has(file) ?? false)
-                }
-                const prefix = () => fileTreeRowPrefix(rows(), index(), row, props.expandedNodes)
-                const status = () => fileTreeRowStatus(row, props.files, reviewed())
-                const name = () =>
-                  Locale.truncate(row.name, Math.max(1, props.width - FILE_TREE_STATUS_WIDTH - prefix().length))
-                return (
-                  <box
-                    flexDirection="row"
-                    width="100%"
-                    backgroundColor={highlighted() ? theme.background.action.primary.focused : undefined}
-                    onMouseUp={() => props.onRowClick?.(row)}
-                  >
-                    <text
-                      fg={highlighted() ? theme.text.action.primary.focused : fadedColor()}
-                      wrapMode="none"
-                      flexShrink={0}
-                    >
-                      {prefix()}
-                    </text>
-                    <box flexGrow={1} minWidth={0}>
-                      <text
-                        fg={
-                          highlighted()
-                            ? theme.text.action.primary.focused
-                            : selected()
-                              ? theme.text.formfield.selected
-                              : reviewed() || row.kind === "directory"
-                                ? theme.text.subdued
-                                : theme.text.default
+        <box height={1} flexShrink={0} flexDirection="row" marginBottom={1} gap={1}>
+          <text
+            id="diff-source-switch"
+            fg={
+              props.onSwitchSource
+                ? sourceHovered()
+                  ? theme.text.action.secondary.hovered
+                  : theme.text.action.secondary.default
+                : theme.text.default
+            }
+            attributes={TextAttributes.BOLD}
+            flexGrow={1}
+            wrapMode="none"
+            truncate
+            selectable={false}
+            onMouseOver={() => setSourceHovered(true)}
+            onMouseOut={() => setSourceHovered(false)}
+            onMouseUp={(event) => {
+              if (event.button !== MouseButton.LEFT) return
+              event.stopPropagation()
+              props.onSwitchSource?.()
+            }}
+          >
+            {props.source ?? "Files"}
+          </text>
+          <text fg={theme.text.subdued} wrapMode="none" flexShrink={0}>
+            {reviewedCount()}/{props.files.length} reviewed
+          </text>
+        </box>
+        <scrollbox
+          id="diff-files"
+          ref={(element: ScrollBoxRenderable) => (scroll = element)}
+          flexGrow={1}
+          minHeight={0}
+          verticalScrollbarOptions={{ visible: false }}
+          horizontalScrollbarOptions={{ visible: false }}
+        >
+          <Switch>
+            <Match when={props.loading || props.error}>
+              <text />
+            </Match>
+            <Match when={props.files.length === 0}>
+              <text fg={theme.text.subdued}>No files</text>
+            </Match>
+            <Match when={props.files.length > 0}>
+              <box flexShrink={0} gap={list() ? 1 : 0}>
+                <For each={rows()}>
+                  {(row) => {
+                    const [hovered, setHovered] = createSignal(false)
+                    const selected = () => row.fileIndex !== undefined && props.selectedFileIndex === row.fileIndex
+                    const reviewed = () => {
+                      const file = row.fileIndex === undefined ? undefined : props.files[row.fileIndex]?.file
+                      return file !== undefined && (props.reviewedFileNames?.has(file) ?? false)
+                    }
+                    const foreground = () => {
+                      if (row.kind === "directory") return theme.text.subdued
+                      return reviewed() ? theme.text.subdued : theme.text.default
+                    }
+                    const background = () => {
+                      // Elevated context maps this to a quiet neutral surface step, not the loud accent.
+                      if (hovered()) return theme.background.action.primary.hovered
+                      return theme.background.default
+                    }
+                    const marker = () => {
+                      if (row.kind !== "directory") return "≡ "
+                      return props.expandedNodes && !props.expandedNodes.has(row.id) ? "▸ " : "▾ "
+                    }
+                    // Rails run straight down from each ancestor folder; no end hooks.
+                    const indent = createMemo(() => {
+                      if (list()) return ""
+                      return "│ ".repeat(Math.max(0, Math.min(row.depth, Math.floor((contentWidth() - 3) / 2))))
+                    })
+                    const status = () => fileTreeRowStatus(row, props.files, reviewed())
+                    const statusColor = () => {
+                      if (reviewed()) return theme.text.subdued
+                      const status = row.fileIndex === undefined ? undefined : props.files[row.fileIndex]?.status
+                      if (status === "added") return theme.diff.text.added
+                      if (status === "deleted") return theme.diff.text.removed
+                      return theme.text.subdued
+                    }
+                    const name = () => {
+                      const width = contentWidth() - stringWidth(indent()) - stringWidth(marker())
+                      if (row.kind === "directory") return truncateDirectoryChain(row.name, width)
+                      return truncateFilePath(row.name, width)
+                    }
+                    const parent = () => {
+                      const file = row.fileIndex === undefined ? "" : (props.files[row.fileIndex]?.file ?? "")
+                      const directory = file.slice(0, Math.max(0, file.lastIndexOf("/")))
+                      return directory ? truncateDirectoryChain(directory, contentWidth() - stringWidth(marker())) : ""
+                    }
+                    return (
+                      <box
+                        id={
+                          row.fileIndex === undefined ? `diff-folder-row-${row.id}` : `diff-file-row-${row.fileIndex}`
                         }
-                        wrapMode="none"
+                        flexDirection="column"
+                        width="100%"
+                        height={list() ? 2 : 1}
+                        flexShrink={0}
+                        backgroundColor={background()}
+                        onMouseOver={() => setHovered(true)}
+                        onMouseOut={() => setHovered(false)}
+                        onMouseDown={(event) => {
+                          if (row.fileIndex !== undefined) props.onFileContextMenu?.(row.fileIndex, event)
+                        }}
+                        onMouseUp={(event) => {
+                          if (event.button !== MouseButton.LEFT) return
+                          event.stopPropagation()
+                          props.onRowClick?.(row)
+                        }}
                       >
-                        {name()}
-                      </text>
-                    </box>
-                    <text
-                      fg={highlighted() ? theme.text.action.primary.focused : theme.text.subdued}
-                      wrapMode="none"
-                      flexShrink={0}
-                    >
-                      {status()}
-                    </text>
-                  </box>
-                )
-              }}
-            </For>
-          </Match>
-        </Switch>
-      </scrollbox>
-    </Panel>
+                        <box flexDirection="row" height={1}>
+                          <text wrapMode="none" flexShrink={0}>
+                            <span style={{ fg: rail() }}>{indent()}</span>
+                            <span style={{ fg: faint() }}>{marker()}</span>
+                          </text>
+                          <box flexGrow={1} minWidth={0} marginRight={1}>
+                            <text
+                              fg={foreground()}
+                              attributes={selected() ? TextAttributes.BOLD : undefined}
+                              wrapMode="none"
+                              truncate
+                            >
+                              {name()}
+                            </text>
+                          </box>
+                          <text fg={statusColor()} wrapMode="none" width={FILE_TREE_STATUS_WIDTH} flexShrink={0}>
+                            {status()}
+                          </text>
+                        </box>
+                        <Show when={list()}>
+                          <text
+                            fg={foreground()}
+                            attributes={selected() || hovered() ? TextAttributes.DIM : undefined}
+                            marginLeft={stringWidth(marker())}
+                            wrapMode="none"
+                            truncate
+                          >
+                            {parent()}
+                          </text>
+                        </Show>
+                      </box>
+                    )
+                  }}
+                </For>
+              </box>
+            </Match>
+          </Switch>
+        </scrollbox>
+        <Show when={props.footer}>
+          <box flexShrink={0} paddingTop={1} paddingBottom={1}>
+            {props.footer}
+          </box>
+        </Show>
+      </box>
+    </box>
   )
 }
 
-function scrollFileTreeRowIntoView(scroll: ScrollBoxRenderable | undefined, index: number) {
-  if (!scroll) return
-  if (index < scroll.scrollTop) {
-    scroll.scrollTo(index)
+function scrollFileTreeRowIntoView(scroll: ScrollBoxRenderable | undefined, top: number, height: number) {
+  if (!scroll || scroll.isDestroyed) return
+  if (top < scroll.scrollTop) {
+    scroll.scrollTo(top)
     return
   }
-  if (index >= scroll.scrollTop + scroll.viewport.height) {
-    scroll.scrollTo(index - scroll.viewport.height + 1)
+  if (top + height > scroll.scrollTop + scroll.viewport.height) {
+    scroll.scrollTo(top + height - scroll.viewport.height)
   }
 }
 
-function fileTreeRowPrefix(
-  rows: readonly FileTreeRow[],
-  index: number,
-  row: FileTreeRow,
-  expandedNodes: ReadonlySet<number> | undefined,
-) {
-  const indentation = Array.from({ length: row.depth }, (_, depth) => {
-    if (depth === 0 && !hasLaterSibling(rows, 0, 0)) return " "
-    return hasLaterSibling(rows, index, depth) ? "│  " : "   "
-  }).join("")
-  const topRoot = index === 0 && row.depth === 0
-  const branch = topRoot ? " " : hasLaterSibling(rows, index, row.depth) ? "├─ " : "└─ "
-  const marker = row.kind === "directory" ? (expandedNodes && !expandedNodes.has(row.id) ? "▸ " : "▾ ") : ""
-
-  return `${indentation}${branch}${marker}`
-}
-
-function hasLaterSibling(rows: readonly FileTreeRow[], index: number, depth: number) {
-  return rows.slice(index + 1).find((row) => row.depth <= depth)?.depth === depth
-}
-
 function fileTreeRowStatus(row: FileTreeRow, files: readonly FileTreeItem[], reviewed: boolean) {
   if (row.fileIndex === undefined) return ""
+  if (reviewed) return "✓"
   const status = files[row.fileIndex]?.status
-  const marker = status === "modified" ? "M" : status === "added" ? "A" : status === "deleted" ? "D" : "?"
-  return `${reviewed ? "✓" : " "}${marker}`.padStart(FILE_TREE_STATUS_WIDTH)
+  return status === "modified" ? "M" : status === "added" ? "A" : status === "deleted" ? "D" : "?"
+}
+
+// Collapsed chains drop whole leading segments instead of squeezing
+// mid-segment, so "a/b/c/d" narrows to "…/c/d" rather than "…/b…/c/d".
+function truncateDirectoryChain(name: string, maxWidth: number) {
+  if (stringWidth(name) <= maxWidth) return name
+  const kept: string[] = []
+  let width = stringWidth("…/")
+  for (const segment of name.split("/").toReversed()) {
+    const next = stringWidth(segment) + (kept.length ? 1 : 0)
+    if (width + next > maxWidth) break
+    kept.unshift(segment)
+    width += next
+  }
+  if (kept.length === 0) return truncateFilePath(name, maxWidth)
+  return `…/${kept.join("/")}`
 }

packages/tui/src/feature-plugins/system/diff-viewer-image.tsx

@@ -0,0 +1,96 @@
+/** @jsxImportSource @opentui/solid */
+import { useTerminalDimensions } from "@opentui/solid"
+import type { MouseEvent } from "@opentui/core"
+import { createResource, createSignal, Match, onCleanup, Show, Switch } from "solid-js"
+import { DialogImagePreview } from "../../component/dialog-image-preview"
+import { useTheme } from "../../context/theme"
+import { useDialog } from "../../ui/dialog"
+
+export function isDiffImageFile(file: string) {
+  return /\.(png|jpe?g|webp|gif)$/i.test(file)
+}
+
+export function DiffViewerImage(props: {
+  file: string
+  load: (file: string, signal: AbortSignal) => Promise<Uint8Array>
+  label?: string
+}) {
+  const theme = useTheme()
+  const dialog = useDialog()
+  const dimensions = useTerminalDimensions()
+  const height = () => Math.max(3, Math.min(8, Math.floor(dimensions().height / 4)))
+  const [image] = createResource(
+    () => {
+      const controller = new AbortController()
+      onCleanup(() => controller.abort())
+      return { file: props.file, signal: controller.signal }
+    },
+    (input) => props.load(input.file, input.signal),
+  )
+
+  return (
+    <box width="100%" flexShrink={0} gap={1} paddingLeft={1} paddingRight={1} paddingBottom={1}>
+      <text fg={theme.text.subdued}>{props.label ?? "Working tree preview"}</text>
+      <box height={height() + 2} flexShrink={0} gap={1}>
+        <Switch>
+          <Match when={image.error}>
+            <text fg={theme.text.feedback.error.default}>Could not load image</text>
+          </Match>
+          <Match when={image.loading}>
+            <text fg={theme.text.subdued}>Loading image...</text>
+          </Match>
+          <Match when={!image.error && image()} keyed>
+            {(bytes) => {
+              const [failed, setFailed] = createSignal(false)
+              const [size, setSize] = createSignal<string>()
+              const open = (event: MouseEvent) => {
+                if (event.button !== 0 || !size() || failed()) return
+                event.stopPropagation()
+                dialog.replace(() => (
+                  <DialogImagePreview
+                    images={[
+                      {
+                        uri: `data:application/octet-stream;base64,${Buffer.from(bytes).toString("base64")}`,
+                        mention: { text: props.file },
+                      },
+                    ]}
+                    initial={0}
+                  />
+                ))
+              }
+              return (
+                <Show
+                  when={!failed()}
+                  fallback={<text fg={theme.text.feedback.error.default}>Could not decode image</text>}
+                >
+                  <box width="100%" height={height()} onMouseUp={open}>
+                    <image
+                      id={`diff-image-${props.file}`}
+                      source={bytes}
+                      fit="fit"
+                      protocol="auto"
+                      width="100%"
+                      height="100%"
+                      onLoad={(loaded) => setSize(`${loaded.width} x ${loaded.height}`)}
+                      onError={() => setFailed(true)}
+                    />
+                  </box>
+                  <Show when={size()}>
+                    {(value) => (
+                      <box flexDirection="row" justifyContent="space-between">
+                        <text fg={theme.text.subdued}>{value()}</text>
+                        <text fg={theme.text.action.secondary.default} onMouseUp={open}>
+                          Click to enlarge
+                        </text>
+                      </box>
+                    )}
+                  </Show>
+                </Show>
+              )
+            }}
+          </Match>
+        </Switch>
+      </box>
+    </box>
+  )
+}