fix(story-mode): a stop names the step Claude was on and what its to-do list still had open

From review round 9: "You stop Claude here, during its step 3." said
where Claude was, not what that meant. The stop now carries the step's
own words, "during its step 3 (new tests under test/)", and when Claude
kept a to-do list, what was still open on it: "Not done yet: Write the
new tests; Update the README and 1 more."

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

test/fixtures/story-corpus/teammates-then-interrupt.expected.json

@@ -304,7 +304,7 @@
       {
         "kind": "complete",
         "ok": null,
-        "story": "You stop Claude here, during its step 3. Saved before the stop: 2 commits.",
+        "story": "You stop Claude here, during its step 3 (new tests under test/). Saved before the stop: 2 commits.",
         "director": "interrupted · 2 min 41 s · 5 tool calls · 4 files changed",
         "balloon": "Step 3: new tests under test/.",
         "tests": null,

test/story-corpus.test.ts

@@ -101,7 +101,7 @@ describe('Story Mode on real sessions', () => {
       ['human', true],
     ]);
     expect(pages[3].panels.at(-1)?.story).toBe(
-      'You stop Claude here, during its step 3. Saved before the stop: 2 commits.'
+      'You stop Claude here, during its step 3 (new tests under test/). Saved before the stop: 2 commits.'
     );
   });
 

test/story-mode.test.ts

@@ -984,6 +984,31 @@ describe('buildStoryPage', () => {
     expect(pageOf([prompt('c'), ...bash('b1', 'git commit -qm x', 'Commit', ''), end(1000)]).events[1].commits).toBe(1);
   });
 
+  it('a stop names the step Claude was on and what its to-do list still had open', () => {
+    const stopped = (lines: unknown[]) =>
+      pageOf([...lines, prompt('[Request interrupted by user]')]).panels.find((p) => p.kind === 'complete')!.caption
+        .story;
+    expect(
+      stopped([
+        prompt('three things'),
+        tool('t1', 'TodoWrite', {
+          todos: [
+            { content: 'Split the module', status: 'completed' },
+            { content: 'Write the new tests', status: 'in_progress' },
+            { content: 'Update the README', status: 'pending' },
+            { content: 'Update CONTRIBUTING', status: 'pending' },
+          ],
+        }),
+        result('t1', 'Todos have been modified successfully.'),
+        ...bash('b1', 'git commit -qm "split"', 'Commit', ''),
+        said('Step 2: **new tests** under `test/`. First I work out the values.'),
+      ])
+    ).toBe(
+      'You stop Claude here, during its step 2 (new tests under test/). Saved before the stop: 1 commit. Not done yet: Write the new tests; Update the README and 1 more.'
+    );
+    expect(stopped([prompt('go'), ...bash('b1', 'ls', 'List', 'a')])).toBe('You stop Claude here.');
+  });
+
   it('the first save in a folder Claude made a repository says so; a bare copy target does not count', () => {
     const save = (lines: unknown[]) => pageOf(lines).panels.find((p) => p.kind === 'save')!.caption.story;
     expect(