fix(core): stream Code Mode tool progress (#38718)

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

@@ -515,7 +515,7 @@ describe("ToolRegistry", () => {
     }),
   )
 
-  it.effect("executes codemode tools advertised in a model request", () =>
+  it.effect("executes and reports progress for codemode tools advertised in a model request", () =>
     Effect.gen(function* () {
       const service = yield* ToolRegistry.Service
       const executed: string[] = []
@@ -526,8 +526,11 @@ describe("ToolRegistry", () => {
             description: "Echo text",
             input: Schema.Struct({ text: Schema.String }),
             output: Schema.Struct({ text: Schema.String }),
-            execute: ({ text }) =>
-              Effect.sync(() => executed.push(`old:${text}`)).pipe(Effect.as({ output: { text } })),
+            execute: ({ text }, context) =>
+              Effect.sync(() => executed.push(`old:${text}`)).pipe(
+                Effect.andThen(context.progress({ stage: "old" })),
+                Effect.as({ output: { text } }),
+              ),
           }),
         })
         .pipe(Scope.provide(scope))
@@ -546,6 +549,7 @@ describe("ToolRegistry", () => {
         }),
       })
 
+      const progress: ToolRegistry.Progress[] = []
       const execution = yield* toolSet.execute({
         ...call("execute"),
         call: {
@@ -554,10 +558,15 @@ describe("ToolRegistry", () => {
           name: "execute",
           input: { code: 'return await tools.echo({ text: "request" })' },
         },
+        progress: (update) => Effect.sync(() => progress.push(update)),
       })
 
       expect(execution).toMatchObject({ status: "completed", content: [{ type: "text" }] })
       expect(executed).toEqual(["old:request"])
+      expect(progress).toEqual([
+        { toolCalls: [{ tool: "echo", status: "running", input: { text: "request" } }] },
+        { toolCalls: [{ tool: "echo", status: "completed", input: { text: "request" } }] },
+      ])
     }),
   )
 })

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

@@ -4,7 +4,7 @@ import { Tool } from "@opencode-ai/core/tool/tool"
 import { Agent } from "@opencode-ai/schema/agent"
 import { Session } from "@opencode-ai/schema/session"
 import { SessionMessage } from "@opencode-ai/schema/session-message"
-import { Effect, Schema } from "effect"
+import { Deferred, Effect, Fiber, Schema } from "effect"
 
 const context = {
   sessionID: Session.ID.make("ses_execute"),
@@ -131,3 +131,46 @@ test("execute supports callable namespace tools", async () => {
   })
   expect(result.content).toEqual([{ type: "text", text: '[\n  "admin",\n  "created"\n]' }])
 })
+
+test("execute marks every admitted child call failed when interrupted", async () => {
+  const child = Tool.make({
+    description: "Wait forever",
+    input: Schema.Struct({ id: Schema.Number }),
+    output: Schema.String,
+    execute: () => Effect.never,
+  })
+  const execute = ExecuteTool.create(new Map([["wait", { tool: child, name: "wait", permission: "wait" }]]))
+  const updates: Tool.Metadata[] = []
+
+  await Effect.runPromise(
+    Effect.gen(function* () {
+      const started = yield* Deferred.make<void>()
+      const fiber = yield* Tool.execute(
+        execute,
+        { code: "return await Promise.all([tools.wait({ id: 1 }), tools.wait({ id: 2 })])" },
+        {
+          ...context,
+          progress: (update) =>
+            Effect.gen(function* () {
+              updates.push(update)
+              if (updates.length > 1) return
+              yield* Deferred.succeed(started, undefined)
+              yield* Effect.never
+            }),
+        },
+      ).pipe(Effect.forkChild)
+      yield* Deferred.await(started)
+      yield* Effect.yieldNow
+      yield* Effect.yieldNow
+      yield* Fiber.interrupt(fiber)
+    }),
+  )
+
+  expect(updates[0]).toEqual({ toolCalls: [{ tool: "wait", status: "running", input: { id: 1 } }] })
+  expect(updates.at(-1)).toEqual({
+    toolCalls: [
+      { tool: "wait", status: "error", input: { id: 1 } },
+      { tool: "wait", status: "error", input: { id: 2 } },
+    ],
+  })
+})