test(claude): reproduce stopped background child restored as running

packages/app/e2e/browser/composer-focus.spec.ts

@@ -1,11 +1,5 @@
 import { expect, test, type Page } from "../support/fixtures";
 import {
-  pasteRichTextIntoComposer,
-  fillComposerDraft,
-  copyLatestTurnIntoComposer,
-  selectComposerDraftRange,
-  undoComposerEdit,
-  redoComposerEdit,
   blurComposerInput,
   roundTripComposerTabBeforePaint,
   composerLocator,
@@ -34,7 +28,6 @@ import {
   openMobileAgentSidebarWithKeyboard,
   swipeOpenMobileExplorer,
 } from "../support/helpers/sidebar";
-import { installDaemonWebSocketGate } from "../support/helpers/daemon-websocket-gate";
 import { readScrollMetrics } from "../support/helpers/agent-bottom-anchor";
 import {
   expectTimelinePromptPositionPreserved,
@@ -62,9 +55,7 @@ test("clicking chat text or background focuses the feed for keyboard paging", as
     await expect
       .poll(async () => (await readScrollMetrics(page)).offsetY)
       .toBeLessThan(beforePaging.offsetY - beforePaging.viewportHeight / 2);
-    await page.screenshot({
-      path: testInfo.outputPath("chat-keyboard-paging.png"),
-    });
+    await page.screenshot({ path: testInfo.outputPath("chat-keyboard-paging.png") });
     await page.keyboard.press("PageDown");
     await expect
       .poll(async () => (await readScrollMetrics(page)).distanceFromBottom)
@@ -133,15 +124,11 @@ test("focusing the feed preserves assistant text selection and code copy control
 });
 
 test("submitting a message leaves the composer ready for the next message", async ({ page }) => {
-  const copiedTable =
-    "| Resource | Status |\n| --- | --- |\n| [Unicode](https://example.com/日本語) | ~~closed~~ |\n| [Space](<https://example.com/a b>) | **open** |\n| [ASCII](https://example.com/1) | closed |";
   const agent = await seedMockAgentWorkspace({
     repoPrefix: "composer-focus-",
     title: "Composer focus",
-    featureValues: { mockAssistantResponse: copiedTable },
   });
 
-  const connection = await installDaemonWebSocketGate(page);
   try {
     await openAgentRoute(page, agent);
     await expectComposerVisible(page);
@@ -149,62 +136,8 @@ test("submitting a message leaves the composer ready for the next message", asyn
     await submitMessage(page, "First message");
     await expectComposerFocused(page);
 
-    await typeIntoFocusedComposer(page, "Investigate: replace this. Thanks");
-    await selectComposerDraftRange(page, 13, 25);
-    await pasteRichTextIntoComposer({
-      page,
-      html: '<a href="https://example.com/issues/39150">this FR</a>',
-      text: "this FR",
-    });
-    await expectComposerDraft(
-      page,
-      "Investigate: [this FR](https://example.com/issues/39150). Thanks",
-    );
-    await undoComposerEdit(page);
-    await expectComposerDraft(page, "Investigate: replace this. Thanks");
-    await redoComposerEdit(page);
-    await expectComposerDraft(
-      page,
-      "Investigate: [this FR](https://example.com/issues/39150). Thanks",
-    );
-    await typeIntoFocusedComposer(page, " next");
-    await expectComposerDraft(
-      page,
-      "Investigate: [this FR](https://example.com/issues/39150) next. Thanks",
-    );
-    await agent.client.waitForFinish(agent.agentId, 15_000);
-    await expect(page.getByRole("button", { name: "Copy turn", exact: true })).toBeVisible();
-    await connection.drop();
-    await connection.waitForBlockedConnection();
-    await pasteRichTextIntoComposer({
-      page,
-      html: '<a href="https://example.com/offline">offline link</a>',
-      text: "offline link",
-    });
-    await expectComposerDraft(
-      page,
-      "Investigate: [this FR](https://example.com/issues/39150) next[offline link](https://example.com/offline). Thanks",
-    );
-    await fillComposerDraft(page, "");
-    await pasteRichTextIntoComposer({
-      page,
-      html: '<table><thead><tr><th>Resource</th><th>Status</th></tr></thead><tbody><tr><td><a href="https://example.com/issue">Issue</a></td><td>closed</td></tr></tbody></table>',
-      text: "Resource\tStatus\nIssue\tclosed",
-    });
-    await expectComposerDraft(
-      page,
-      "| Resource | Status |\n| --- | --- |\n| [Issue](https://example.com/issue) | closed |",
-    );
-    await fillComposerDraft(page, "");
-    await pasteRichTextIntoComposer({
-      page,
-      html: '<a href="https://example.com/">Issue</a><table></table>',
-      text: "Issue",
-    });
-    await expectComposerDraft(page, "[Issue](https://example.com/)");
-    await copyLatestTurnIntoComposer(page);
-    await expectComposerDraft(page, copiedTable);
-    await expectComposerFocused(page);
+    await typeIntoFocusedComposer(page, "Second message");
+    await expectComposerDraft(page, "Second message");
   } finally {
     await agent.cleanup();
   }
@@ -235,11 +168,7 @@ async function waitForAnimationFrames(page: Page, count: number): Promise<void>
 test.describe("touch screen wide enough for the desktop layout", () => {
   // A tablet or an unfolded foldable gets the desktop layout, but focusing the
   // composer there raises the on-screen keyboard over the conversation.
-  test.use({
-    viewport: { width: 1024, height: 768 },
-    isMobile: true,
-    hasTouch: true,
-  });
+  test.use({ viewport: { width: 1024, height: 768 }, isMobile: true, hasTouch: true });
 
   test("remounting an inline composer does not restore focus on touch", async ({ page }) => {
     const agent = await seedMockAgentWorkspace({
@@ -263,9 +192,7 @@ test.describe("touch screen wide enough for the desktop layout", () => {
   test("returning to an inactive inline composer does not restore focus on touch", async ({
     page,
   }) => {
-    const workspace = await seedWorkspace({
-      repoPrefix: "composer-touch-retained-",
-    });
+    const workspace = await seedWorkspace({ repoPrefix: "composer-touch-retained-" });
     try {
       const first = await createMockIdleAgent(workspace.client, {
         cwd: workspace.repoPath,

packages/app/e2e/browser/workspace-archive-undo.spec.ts

@@ -112,7 +112,6 @@ test.describe("Workspace archive undo", () => {
 
     await expect(workspaceRow(page, worktree.workspaceId)).toBeVisible({ timeout: 30_000 });
     await expectDirectoryPresence(worktree.workspaceDirectory, true);
-    await expectHostWorkspaceSettledActive(client, worktree.workspaceId);
   });
 
   test("hovering Undo keeps the toast open past its deadline, and its close ends the undo", async ({

packages/app/e2e/support/helpers/composer.ts

@@ -31,9 +31,7 @@ export async function expectComposerVisible(
   page: Page,
   options?: { timeout?: number },
 ): Promise<void> {
-  await expect(composerInput(page)).toBeVisible({
-    timeout: options?.timeout ?? 15_000,
-  });
+  await expect(composerInput(page)).toBeVisible({ timeout: options?.timeout ?? 15_000 });
 }
 
 export async function expectComposerDisabled(page: Page): Promise<void> {
@@ -158,9 +156,7 @@ export async function attachImageFromMenu(
 }
 
 export async function expectAttachmentPill(page: Page, testID: string): Promise<void> {
-  await expect(page.getByTestId(testID).first()).toBeVisible({
-    timeout: 10_000,
-  });
+  await expect(page.getByTestId(testID).first()).toBeVisible({ timeout: 10_000 });
 }
 
 export async function attachFileFromMenu(
@@ -222,24 +218,18 @@ export async function expectGithubAttachmentPill(
 
 export async function openImageLightbox(page: Page): Promise<void> {
   await page.getByRole("button", { name: "Open image attachment" }).first().click();
-  await expect(page.getByTestId("attachment-lightbox-close")).toBeVisible({
-    timeout: 5_000,
-  });
+  await expect(page.getByTestId("attachment-lightbox-close")).toBeVisible({ timeout: 5_000 });
 }
 
 export async function closeImageLightbox(page: Page): Promise<void> {
   await page.keyboard.press("Escape");
-  await expect(page.getByTestId("attachment-lightbox-close")).not.toBeVisible({
-    timeout: 5_000,
-  });
+  await expect(page.getByTestId("attachment-lightbox-close")).not.toBeVisible({ timeout: 5_000 });
 }
 
 export async function openGithubPickerFromMenu(page: Page): Promise<void> {
   await openAttachmentMenu(page);
   await page.getByTestId("message-input-attachment-menu-item-github").click();
-  await expect(page.getByTestId("combobox-desktop-container")).toBeVisible({
-    timeout: 5_000,
-  });
+  await expect(page.getByTestId("combobox-desktop-container")).toBeVisible({ timeout: 5_000 });
 }
 
 /** Open picker, type a query, wait for the matching option by id (e.g. "issue:3", "change_request:1"), and click it. */
@@ -293,10 +283,7 @@ export async function startRunningMockAgent(
     model: opts.model,
     featureValues: opts.featureValues,
   });
-  const agentUrl = `${buildHostWorkspaceRoute(
-    serverId,
-    workspace.id,
-  )}?open=${encodeURIComponent(`agent:${agent.id}`)}`;
+  const agentUrl = `${buildHostWorkspaceRoute(serverId, workspace.id)}?open=${encodeURIComponent(`agent:${agent.id}`)}`;
   await page.goto(agentUrl);
   await expectComposerVisible(page);
   await client.sendAgentMessage(agent.id, opts.prompt);
@@ -360,11 +347,7 @@ export async function pasteComposerTestImage(page: Page): Promise<boolean> {
     const bytes = Uint8Array.from(atob(base64), (character) => character.charCodeAt(0));
     const clipboardData = new DataTransfer();
     clipboardData.items.add(new File([bytes], "pasted.png", { type: "image/png" }));
-    const event = new ClipboardEvent("paste", {
-      clipboardData,
-      bubbles: true,
-      cancelable: true,
-    });
+    const event = new ClipboardEvent("paste", { clipboardData, bubbles: true, cancelable: true });
     input.dispatchEvent(event);
     return event.defaultPrevented;
   }, COMPOSER_TEST_IMAGE_BASE64);
@@ -522,10 +505,7 @@ export async function recordVisibleComposerGeometry(page: Page): Promise<void> {
 export async function expectNoCollapsedVisibleComposer(page: Page): Promise<void> {
   const frames = await page.evaluate(() => {
     Reflect.get(window, "__stopComposerGeometry")?.();
-    return Reflect.get(window, "__composerGeometryFrames") as {
-      input: number;
-      root: number;
-    }[];
+    return Reflect.get(window, "__composerGeometryFrames") as { input: number; root: number }[];
   });
   expect(frames.length).toBeGreaterThan(0);
   expect(frames.filter((frame) => frame.root < 42 || frame.input < 42)).toEqual([]);
@@ -536,10 +516,7 @@ export async function roundTripComposerTabBeforePaint(
   page: Page,
   activeChatTitle: string,
 ): Promise<void> {
-  const activeTab = page.getByRole("button", {
-    name: activeChatTitle,
-    exact: true,
-  });
+  const activeTab = page.getByRole("button", { name: activeChatTitle, exact: true });
   await expect(activeTab).toHaveAttribute("aria-selected", "true");
   const result = await activeTab.evaluate((tab) => {
     const editor = document.activeElement;
@@ -579,10 +556,7 @@ export async function roundTripComposerTabBeforePaint(
           });
         }
       });
-      observer.observe(tab, {
-        attributes: true,
-        attributeFilter: ["aria-selected"],
-      });
+      observer.observe(tab, { attributes: true, attributeFilter: ["aria-selected"] });
       shortcut("BracketLeft");
     });
   });
@@ -592,44 +566,3 @@ export async function roundTripComposerTabBeforePaint(
   ).toBe(true);
   expect(result.focused, "returning on touch must leave the composer unfocused").toBe(false);
 }
-
-/** Paste both clipboard representations through the browser's normal paste command. */
-export async function pasteRichTextIntoComposer({
-  page,
-  html,
-  text,
-}: {
-  page: Page;
-  html: string;
-  text: string;
-}): Promise<void> {
-  await page.context().grantPermissions(["clipboard-read", "clipboard-write"]);
-  await page.evaluate(
-    async ({ html: richHtml, text: plainText }) => {
-      await navigator.clipboard.write([
-        new ClipboardItem({
-          "text/html": new Blob([richHtml], { type: "text/html" }),
-          "text/plain": new Blob([plainText], { type: "text/plain" }),
-        }),
-      ]);
-    },
-    { html, text },
-  );
-  await composerInput(page).press("ControlOrMeta+v");
-}
-
-export async function undoComposerEdit(page: Page): Promise<void> {
-  await composerInput(page).press("ControlOrMeta+z");
-}
-export async function redoComposerEdit(page: Page): Promise<void> {
-  await composerInput(page).press("ControlOrMeta+Shift+z");
-}
-
-/** Reuse the actual response Copy action and the browser's native paste. */
-export async function copyLatestTurnIntoComposer(page: Page): Promise<void> {
-  await page.context().grantPermissions(["clipboard-read", "clipboard-write"]);
-  await page.getByRole("button", { name: "Copy turn", exact: true }).last().click();
-  await expect(page.getByRole("button", { name: "Copied", exact: true })).toBeVisible();
-  await composerInput(page).fill("");
-  await composerInput(page).press("ControlOrMeta+v");
-}

packages/app/src/composer/input/input.tsx

@@ -88,7 +88,6 @@ import { RenderProfile } from "@/utils/render-profiler";
 import { useComposerHeight } from "./height";
 import { ComposerInputPresentation } from "./presentation";
 import { resolveComposerInputMode, type ComposerInputMode } from "@/composer/input-mode";
-import { pasteLinkedClipboardText } from "@/composer/pasted-text";
 import type { NativePastedFile } from "@/composer/native-pasted-image";
 import {
   EditingTextInput,
@@ -514,7 +513,7 @@ function getTextInputNativeElement(current: ComposerTextInputHandle | null): HTM
   return native instanceof HTMLElement ? native : null;
 }
 
-interface PasteEffectArgs {
+interface PasteImagesEffectArgs {
   textarea: HTMLElement | null;
   isConnected: boolean;
   disabled: boolean;
@@ -523,7 +522,7 @@ interface PasteEffectArgs {
   onAddImages: ((images: ImageAttachment[]) => void) | undefined;
 }
 
-function usePasteEffect(args: PasteEffectArgs): void {
+function usePasteImagesEffect(args: PasteImagesEffectArgs): void {
   const {
     textarea,
     isConnected,
@@ -534,20 +533,16 @@ function usePasteEffect(args: PasteEffectArgs): void {
   } = args;
 
   useEffect(() => {
-    if (!isWeb) return;
+    if (!isWeb || !onAddImages) return;
 
     if (!textarea) return;
 
     let disposed = false;
     const handlePaste = (event: ClipboardEvent) => {
-      if (disabled || isDictating || isRealtimeVoiceForCurrentAgent) return;
+      if (!isConnected || disabled || isDictating || isRealtimeVoiceForCurrentAgent) return;
 
       const imageFiles = collectImageFilesFromClipboardData(event.clipboardData);
-      if (imageFiles.length === 0) {
-        if (pasteLinkedClipboardText(textarea, event.clipboardData)) event.preventDefault();
-        return;
-      }
-      if (!isConnected || !onAddImages) return;
+      if (imageFiles.length === 0) return;
 
       event.preventDefault();
 
@@ -1816,7 +1811,7 @@ export const MessageInput = forwardRef<MessageInputRef, MessageInputProps>(
       handleAlternateSendAction();
     }, [alternateSendAction, handleAlternateSendAction]);
 
-    usePasteEffect({
+    usePasteImagesEffect({
       textarea: webTextArea,
       isConnected,
       disabled,

packages/app/src/composer/pasted-text.browser.test.ts

@@ -1,144 +0,0 @@
-import { afterEach, describe, expect, it } from "vitest";
-import { createMarkdownClipboardContent } from "@/utils/rich-clipboard";
-import { pasteLinkedClipboardText } from "./pasted-text.web";
-
-const inputs: HTMLTextAreaElement[] = [];
-function editor(): HTMLTextAreaElement {
-  const input = document.createElement("textarea");
-  document.body.append(input);
-  inputs.push(input);
-  return input;
-}
-afterEach(() => {
-  for (const input of inputs.splice(0)) input.remove();
-});
-
-function clipboard(html: string, text: string): DataTransfer {
-  const data = new DataTransfer();
-  data.setData("text/html", html);
-  data.setData("text/plain", text);
-  return data;
-}
-
-describe("pasted prompt links", () => {
-  it.each([
-    "https://example.com/1",
-    "https://example.com/日本語",
-    "<https://example.com/a b>",
-    "https://例え.テスト/issue",
-  ])("keeps complete Markdown from Copy with destination %s", (destination) => {
-    const source = `| Resource | Status |\n| --- | --- |\n| [issue](${destination}) | ~~closed~~ |`;
-    const content = createMarkdownClipboardContent(source);
-    const input = editor();
-    expect(pasteLinkedClipboardText(input, clipboard(content.html, content.plainText))).toBe(false);
-    expect(input.value).toBe("");
-  });
-  it("converts external links when plain text names the resource but omits a destination", () => {
-    const input = editor();
-    expect(
-      pasteLinkedClipboardText(
-        input,
-        clipboard(
-          '<a href="https://example.com/%E6%97%A5%E6%9C%AC%E8%AA%9E">日本語</a> and <a href="https://example.com/missing">another</a>',
-          "[日本語](https://example.com/日本語) and another",
-        ),
-      ),
-    ).toBe(true);
-    expect(input.value).toBe(
-      "[日本語](https://example.com/%E6%97%A5%E6%9C%AC%E8%AA%9E) and [another](https://example.com/missing)",
-    );
-  });
-  it("preserves a labeled resource URL as Markdown", () => {
-    const data = clipboard(
-      'Hey can you take a look at <a href="https://example.com/issues/39150">this FR</a> and...',
-      "Hey can you take a look at this FR and...",
-    );
-    const input = editor();
-    expect(pasteLinkedClipboardText(input, data)).toBe(true);
-    expect(input.value).toBe(
-      "Hey can you take a look at [this FR](https://example.com/issues/39150) and...",
-    );
-  });
-
-  it("preserves external linked table rows and columns", () => {
-    const input = editor();
-    expect(
-      pasteLinkedClipboardText(
-        input,
-        clipboard(
-          '<table><thead><tr><th>Resource</th><th>Status</th></tr></thead><tbody><tr><td><a href="https://example.com/issue">Issue</a></td><td>closed</td></tr></tbody></table>',
-          "Resource\tStatus\nIssue\tclosed",
-        ),
-      ),
-    ).toBe(true);
-    expect(input.value).toBe(
-      "| Resource | Status |\n| --- | --- |\n| [Issue](https://example.com/issue) | closed |",
-    );
-  });
-
-  it("keeps table cell separators and line breaks inside their cells", () => {
-    const input = editor();
-    expect(
-      pasteLinkedClipboardText(
-        input,
-        clipboard(
-          '<table><tr><th>Resource</th><th>Status</th></tr><tr><td><a href="https://example.com/issue">Issue | tracker</a></td><td>closed<br>today</td></tr></table>',
-          "Resource\tStatus\nIssue | tracker\tclosed today",
-        ),
-      ),
-    ).toBe(true);
-    expect(input.value).toBe(
-      "| Resource | Status |\n| --- | --- |\n| [Issue \\| tracker](https://example.com/issue) | closed<br>today |",
-    );
-  });
-
-  it("retains headerless tables as HTML without inventing a heading", () => {
-    const html =
-      '<table><tbody><tr><td><a href="https://example.com/issue">Issue</a></td><td>closed</td></tr><tr><td>Other</td><td>open</td></tr></tbody></table>';
-    const input = editor();
-    expect(pasteLinkedClipboardText(input, clipboard(html, "Issue\tclosed\nOther\topen"))).toBe(
-      true,
-    );
-    expect(input.value).toBe(html);
-  });
-
-  it.each([
-    ["<table></table>", ""],
-    ["<table><caption>Context</caption></table>", "\n\nContext"],
-  ])("keeps surrounding links when a table has no rows: %s", (table, caption) => {
-    const input = editor();
-    expect(
-      pasteLinkedClipboardText(
-        input,
-        clipboard(`<a href="https://example.com/">Issue</a>${table}`, "Issue"),
-      ),
-    ).toBe(true);
-    expect(input.value).toBe(`[Issue](https://example.com/)${caption}`);
-  });
-
-  it("leaves plain text and rich text without links to native paste", () => {
-    const input = editor();
-    expect(pasteLinkedClipboardText(input, clipboard("", "[link](https://example.com)"))).toBe(
-      false,
-    );
-    expect(pasteLinkedClipboardText(input, clipboard("<b>hello</b>", "hello"))).toBe(false);
-    expect(pasteLinkedClipboardText(input, null)).toBe(false);
-    expect(input.value).toBe("");
-  });
-
-  it("keeps paragraphs and multiple links", () => {
-    const input = editor();
-    expect(
-      pasteLinkedClipboardText(
-        input,
-        clipboard(
-          '<p>See <a href="https://example.com/a">one</a></p><p>and <a href="https://example.com/b">two</a></p>',
-          "See one\n\nand two",
-        ),
-      ),
-    ).toBe(true);
-    expect(input.value).toBe(
-      "See [one](https://example.com/a)\n\nand [two](https://example.com/b)",
-    );
-  });
-});

packages/app/src/composer/pasted-text.ts

@@ -1,7 +0,0 @@
-/** Native inputs retain their platform clipboard handling. */
-export function pasteLinkedClipboardText(
-  _input: HTMLElement,
-  _clipboard: Pick<DataTransfer, "getData"> | null,
-): boolean {
-  return false;
-}

packages/app/src/composer/pasted-text.web.ts

@@ -1,59 +0,0 @@
-import TurndownService from "turndown";
-import { tables } from "turndown-plugin-gfm";
-import { createAssistantMarkdownParser } from "@/utils/assistant-markdown-parser";
-
-const markdown = new TurndownService({
-  codeBlockStyle: "fenced",
-  bulletListMarker: "-",
-});
-// Heading tables become Markdown; headerless tables retain their HTML structure.
-markdown.use(tables);
-markdown.addRule("rowlessTable", {
-  filter: (node) => node.nodeName === "TABLE" && (node as HTMLTableElement).rows.length === 0,
-  replacement: (content) => (content ? `\n\n${content}\n\n` : ""),
-});
-markdown.addRule("tableCell", {
-  filter: ["th", "td"],
-  replacement: (content, node) => {
-    const prefix = node.previousElementSibling ? " " : "| ";
-    const cell = content.trim().replace(/\|/g, "\\|").replace(/ *\n/g, "<br>");
-    return `${prefix}${cell} |`;
-  },
-});
-const copiedMarkdown = createAssistantMarkdownParser();
-
-function linkDestinations(fragment: Document): string[] {
-  return Array.from(fragment.querySelectorAll("a[href]"), (link) => link.getAttribute("href")!);
-}
-
-function containsDestinations(plainText: string, destinations: string[]): boolean {
-  if (destinations.every((url) => plainText.includes(url))) return true;
-
-  // Copy normalizes Markdown URLs in HTML (percent encoding, internationalized
-  // domains). Compare parsed destinations using that same parser, not URL spelling.
-  const rendered = new DOMParser().parseFromString(copiedMarkdown.render(plainText), "text/html");
-  const links = new Set(linkDestinations(rendered));
-  return destinations.every((url) => plainText.includes(url) || links.has(url));
-}
-
-/** Paste linked HTML as Markdown through the browser's undoable editing command. */
-export function pasteLinkedClipboardText(
-  input: HTMLElement,
-  clipboard: Pick<DataTransfer, "getData"> | null,
-): boolean {
-  const html = clipboard?.getData("text/html");
-  if (!html) return false;
-
-  // Parse in a detached document. Clipboard markup is never mounted in the app.
-  const fragment = new DOMParser().parseFromString(html, "text/html");
-  const destinations = linkDestinations(fragment);
-  const plainText = clipboard!.getData("text/plain");
-  // Copy actions already put complete Markdown on the clipboard. Keep that
-  // representation, including tables and formatting, whenever it carries the URLs.
-  if (containsDestinations(plainText, destinations)) return false;
-  const text = markdown.turndown(fragment.body);
-  input.focus();
-  // Direct value assignment drops the textarea's undo history. This also emits
-  // the normal input event so the editor publishes its new draft as for typing.
-  return input.ownerDocument.execCommand("insertText", false, text);
-}

packages/app/src/types/turndown-plugin-gfm.d.ts

@@ -1,6 +1,5 @@
 declare module "turndown-plugin-gfm" {
   import type TurndownService from "turndown";
 
-  export const tables: TurndownService.Plugin;
   export const gfm: TurndownService.Plugin;
 }

packages/server/src/server/agent/providers/claude/agent.sub-agent-replay.test.ts

@@ -648,6 +648,23 @@ describe("ClaudeAgentSession persisted subagent replay", () => {
       );
     }
 
+    test("cancels a background child from a task-id-only stopped notification on reopen", async () => {
+      const text = `<task-notification>\n<task-id>${AGENT_ID}</task-id>\n<status>stopped</status>\n<summary>Background agent didn't finish before the previous session ended</summary>\n</task-notification>`;
+      writeSession({
+        parentLines: [
+          ...backgroundLaunch(),
+          JSON.stringify({ type: "queue-operation", operation: "enqueue", content: text }),
+          JSON.stringify({ type: "user", message: { role: "user", content: text } }),
+        ],
+        meta: JSON.stringify({ toolUseId: TOOL_USE_ID }),
+        sidechainLines: [sidechainEntry({ stopReason: "tool_use" })],
+      });
+      expect(upserts(await replayDescriptors()).at(-1)).toMatchObject({
+        id: TOOL_USE_ID,
+        status: "canceled",
+      });
+    });
+
     test("prefers a stopped notification over the child's end_turn", async () => {
       writeSession({
         parentLines: [...backgroundLaunch(), taskNotification("stopped")],