fix(app): stabilize todo dock e2e with composer probe (#17267)

4 files changed, 163 insertions, 6 deletions

diff --git a/packages/app/src/pages/session/composer/session-composer-region.tsx b/packages/app/src/pages/session/composer/session-composer-region.tsx
index 2034fbead..84f77ea4a 100644
--- a/packages/app/src/pages/session/composer/session-composer-region.tsx
+++ b/packages/app/src/pages/session/composer/session-composer-region.tsx
@@ -44,9 +44,9 @@ export function SessionComposerRegion(props: {
 }) {
   const prompt = usePrompt()
   const language = useLanguage()
-  const { sessionKey } = useSessionKey()
+  const route = useSessionKey()
 
-  const handoffPrompt = createMemo(() => getSessionHandoff(sessionKey())?.prompt)
+  const handoffPrompt = createMemo(() => getSessionHandoff(route.sessionKey())?.prompt)
 
   const previewPrompt = () =>
     prompt
@@ -62,7 +62,7 @@ export function SessionComposerRegion(props: {
 
   createEffect(() => {
     if (!prompt.ready()) return
-    setSessionHandoff(sessionKey(), { prompt: previewPrompt() })
+    setSessionHandoff(route.sessionKey(), { prompt: previewPrompt() })
   })
 
   const [store, setStore] = createStore({
@@ -85,7 +85,7 @@ export function SessionComposerRegion(props: {
   }
 
   createEffect(() => {
-    sessionKey()
+    route.sessionKey()
     const ready = props.ready
     const delay = 140
 
@@ -194,6 +194,7 @@ export function SessionComposerRegion(props: {
               >
                 <div ref={(el) => setStore("body", el)}>
                   <SessionTodoDock
+                    sessionID={route.params.id}
                     todos={props.state.todos()}
                     title={language.t("session.todo.title")}
                     collapseLabel={language.t("session.todo.collapse")}
diff --git a/packages/app/src/pages/session/composer/session-composer-state.ts b/packages/app/src/pages/session/composer/session-composer-state.ts
index 525766dcf..0884f4cc6 100644
--- a/packages/app/src/pages/session/composer/session-composer-state.ts
+++ b/packages/app/src/pages/session/composer/session-composer-state.ts
@@ -1,4 +1,4 @@
-import { createEffect, createMemo, on, onCleanup } from "solid-js"
+import { createEffect, createMemo, on, onCleanup, onMount } from "solid-js"
 import { createStore } from "solid-js/store"
 import type { PermissionRequest, QuestionRequest, Todo } from "@opencode-ai/sdk/v2"
 import { useParams } from "@solidjs/router"
@@ -8,6 +8,7 @@ import { useLanguage } from "@/context/language"
 import { usePermission } from "@/context/permission"
 import { useSDK } from "@/context/sdk"
 import { useSync } from "@/context/sync"
+import { composerDriver, composerEnabled, composerEvent } from "@/testing/session-composer"
 import { sessionPermissionRequest, sessionQuestionRequest } from "./session-request-tree"
 
 export const todoState = (input: {
@@ -47,7 +48,50 @@ export function createSessionComposerState(options?: { closeMs?: number | (() =>
     return !!permissionRequest() || !!questionRequest()
   })
 
+  const [test, setTest] = createStore({
+    on: false,
+    live: undefined as boolean | undefined,
+    todos: undefined as Todo[] | undefined,
+  })
+
+  const pull = () => {
+    const id = params.id
+    if (!id) {
+      setTest({ on: false, live: undefined, todos: undefined })
+      return
+    }
+
+    const next = composerDriver(id)
+    if (!next) {
+      setTest({ on: false, live: undefined, todos: undefined })
+      return
+    }
+
+    setTest({
+      on: true,
+      live: next.live,
+      todos: next.todos?.map((todo) => ({ ...todo })),
+    })
+  }
+
+  onMount(() => {
+    if (!composerEnabled()) return
+
+    pull()
+    createEffect(on(() => params.id, pull, { defer: true }))
+
+    const onEvent = (event: Event) => {
+      const detail = (event as CustomEvent<{ sessionID?: string }>).detail
+      if (detail?.sessionID !== params.id) return
+      pull()
+    }
+
+    window.addEventListener(composerEvent, onEvent)
+    onCleanup(() => window.removeEventListener(composerEvent, onEvent))
+  })
+
   const todos = createMemo((): Todo[] => {
+    if (test.on && test.todos !== undefined) return test.todos
     const id = params.id
     if (!id) return []
     return globalSync.data.session_todo[id] ?? []
@@ -64,7 +108,10 @@ export function createSessionComposerState(options?: { closeMs?: number | (() =>
   })
 
   const busy = createMemo(() => status().type !== "idle")
-  const live = createMemo(() => busy() || blocked())
+  const live = createMemo(() => {
+    if (test.on && test.live !== undefined) return test.live
+    return busy() || blocked()
+  })
 
   const [store, setStore] = createStore({
     responding: undefined as string | undefined,
@@ -116,6 +163,10 @@ export function createSessionComposerState(options?: { closeMs?: number | (() =>
 
   // Keep stale turn todos from reopening if the model never clears them.
   const clear = () => {
+    if (test.on && test.todos !== undefined) {
+      setTest("todos", [])
+      return
+    }
     const id = params.id
     if (!id) return
     globalSync.todo.set(id, [])
diff --git a/packages/app/src/pages/session/composer/session-todo-dock.tsx b/packages/app/src/pages/session/composer/session-todo-dock.tsx
index c7907bb54..5500de97a 100644
--- a/packages/app/src/pages/session/composer/session-todo-dock.tsx
+++ b/packages/app/src/pages/session/composer/session-todo-dock.tsx
@@ -8,6 +8,7 @@ import { TextReveal } from "@opencode-ai/ui/text-reveal"
 import { TextStrikethrough } from "@opencode-ai/ui/text-strikethrough"
 import { Index, createEffect, createMemo, on, onCleanup } from "solid-js"
 import { createStore } from "solid-js/store"
+import { composerEnabled, composerProbe } from "@/testing/session-composer"
 
 function dot(status: Todo["status"]) {
   if (status !== "in_progress") return undefined
@@ -35,6 +36,7 @@ function dot(status: Todo["status"]) {
 }
 
 export function SessionTodoDock(props: {
+  sessionID?: string
   todos: Todo[]
   title: string
   collapseLabel: string
@@ -69,6 +71,8 @@ export function SessionTodoDock(props: {
   const off = createMemo(() => hide() > 0.98)
   const turn = createMemo(() => Math.max(0, Math.min(1, value())))
   const full = createMemo(() => Math.max(78, store.height))
+  const e2e = composerEnabled()
+  const probe = composerProbe(props.sessionID)
   let contentRef: HTMLDivElement | undefined
 
   createEffect(() => {
@@ -83,6 +87,23 @@ export function SessionTodoDock(props: {
     onCleanup(() => observer.disconnect())
   })
 
+  createEffect(() => {
+    if (!e2e) return
+
+    probe.set({
+      mounted: true,
+      collapsed: store.collapsed,
+      hidden: store.collapsed || off(),
+      count: props.todos.length,
+      states: props.todos.map((todo) => todo.status),
+    })
+  })
+
+  onCleanup(() => {
+    if (!e2e) return
+    probe.drop()
+  })
+
   return (
     <DockTray
       data-component="session-todo-dock"
diff --git a/packages/app/src/testing/session-composer.ts b/packages/app/src/testing/session-composer.ts
new file mode 100644
index 000000000..01c809e4c
--- /dev/null
+++ b/packages/app/src/testing/session-composer.ts
@@ -0,0 +1,84 @@
+import type { Todo } from "@opencode-ai/sdk/v2"
+
+export const composerEvent = "opencode:e2e:composer"
+
+export type ComposerDriverState = {
+  live?: boolean
+  todos?: Array<Pick<Todo, "content" | "status" | "priority">>
+}
+
+export type ComposerProbeState = {
+  mounted: boolean
+  collapsed: boolean
+  hidden: boolean
+  count: number
+  states: Todo["status"][]
+}
+
+type ComposerState = {
+  driver?: ComposerDriverState
+  probe?: ComposerProbeState
+}
+
+export type ComposerWindow = Window & {
+  __opencode_e2e?: {
+    composer?: {
+      enabled?: boolean
+      sessions?: Record<string, ComposerState>
+    }
+  }
+}
+
+const clone = (driver: ComposerDriverState) => ({
+  live: driver.live,
+  todos: driver.todos?.map((todo) => ({ ...todo })),
+})
+
+export const composerEnabled = () => {
+  if (typeof window === "undefined") return false
+  return (window as ComposerWindow).__opencode_e2e?.composer?.enabled === true
+}
+
+const root = () => {
+  if (!composerEnabled()) return
+  const state = (window as ComposerWindow).__opencode_e2e?.composer
+  if (!state) return
+  state.sessions ??= {}
+  return state.sessions
+}
+
+export const composerDriver = (sessionID?: string) => {
+  if (!sessionID) return
+  const state = root()?.[sessionID]?.driver
+  if (!state) return
+  return clone(state)
+}
+
+export const composerProbe = (sessionID?: string) => {
+  const set = (next: ComposerProbeState) => {
+    if (!sessionID) return
+    const sessions = root()
+    if (!sessions) return
+    const prev = sessions[sessionID] ?? {}
+    sessions[sessionID] = {
+      ...prev,
+      probe: {
+        ...next,
+        states: [...next.states],
+      },
+    }
+  }
+
+  return {
+    set,
+    drop() {
+      set({
+        mounted: false,
+        collapsed: false,
+        hidden: true,
+        count: 0,
+        states: [],
+      })
+    },
+  }
+}