diff --git a/TODOS.md b/TODOS.md
index 804ba365e..39faf5109 100644
--- a/TODOS.md
+++ b/TODOS.md
@@ -30,6 +30,14 @@ Deferred from the approved reliability follow-ups plan (docs/designs/RELIABILITY
   diagnostic run on the pre-verbatim wording paraphrased it; one on the
   verbatim wording passed. Watch the next censuses; a red here is a template
   miss, not a detector false red. **Effort:** S. **Priority:** P2.
+- **Named red: ship-docsync-late-result on PR run 37237194905** — the model
+  wrote its report to a mistyped shard root (`…-3GanyY` for `…-3GanyU`) at
+  call 20, disclosed it, then wrote the real report at the right path. The
+  authority detector is correct (the file was created outside the fixture);
+  `test/docsync-authority.test.ts` replays the capture. If any docsync case
+  writes to a near-miss shard path again, give the model a short stable
+  fixture root (env var or fixed short symlink) instead of random tokens to
+  copy, without loosening the authority check. **Effort:** S. **Priority:** P2.
 - **PTY sessions are cost-unknown** — `test/helpers/pricing.ts` excludes
   cache-write charges, so PTY trials stay `cost_known: false`. Price them from
   native transcript usage once pricing covers cache writes. **Effort:** S. **Priority:** P3.
diff --git a/test/docsync-authority.test.ts b/test/docsync-authority.test.ts
index 9991ca091..79cc2dc5c 100644
--- a/test/docsync-authority.test.ts
+++ b/test/docsync-authority.test.ts
@@ -105,3 +105,22 @@ test('completed docs review accepts literal cat but not an unrelated command or
     expect(docsCompletedRead(calls({ tool: 'Read', input: { file_path: doc, limit: 1 }, output: original.slice(0, 20) }), doc, fixture)).toBe(false);
   } finally { fixture.clean(); }
 });
+
+test('replay of run 37237194905 late-result: only the write to a mistyped shard root is outside authority', () => {
+  const fixture = fixtureDocs('current');
+  try {
+    const actor = path.join(import.meta.dir, 'helpers', 'docsync-fault-actor.ts');
+    const typoHome = path.join(path.dirname(fixture.home), `typo-${path.basename(fixture.home)}`);
+    const replay = JSON.parse(fs.readFileSync(path.join(import.meta.dir, 'fixtures/docsync-replay/37237194905-late-result-calls.json'), 'utf8'));
+    const toolCalls = replay.calls.map((call: { tool: string; input: Record<string, string> }) => ({ tool: call.tool, output: '',
+      input: Object.fromEntries(Object.entries(call.input).map(([key, value]) => [key,
+        value.replaceAll('<TYPO_HOME>', typoHome).replaceAll('<HOME>', fixture.home).replaceAll('<ACTOR>', actor)])) }));
+    expect(toolCalls).toHaveLength(21);
+    expect(docsToolFailures(calls(...toolCalls), fixture, [actor])).toEqual(['write outside docs fixture authority']);
+    expect(toolCalls[19].input.file_path.startsWith(typoHome)).toBe(true);
+    expect(docsToolFailures(calls(...toolCalls.filter((_: unknown, index: number) => index !== 19)), fixture, [actor])).toEqual([]);
+    const snapshot = [path.join(fixture.skills, 'bin/gstack-docs-candidate'), 'snapshot', '--out', path.join(fixture.home, 'ship-docs-a2-post.json'),
+      '--audit-id', 'ship-docs-a2', '--mode', 'edit', '--base', 'c7e8a106ea1279ee9efc96c79dad732efbc745aa', '--docs', 'handbook'].join(' ');
+    expect(docsToolFailures(calls({ tool: 'Bash', input: { command: snapshot }, output: '' }), fixture, [actor])).toEqual([]);
+  } finally { fixture.clean(); }
+});
diff --git a/test/fixtures/docsync-replay/37237194905-late-result-calls.json b/test/fixtures/docsync-replay/37237194905-late-result-calls.json
new file mode 100644
index 000000000..1cddde214
--- /dev/null
+++ b/test/fixtures/docsync-replay/37237194905-late-result-calls.json
@@ -0,0 +1,136 @@
+{
+ "source": {
+  "run": "37237194905",
+  "case": "ship-docsync-late-result",
+  "sha": "c245d1bc228a38f004927a8ef5e63f1b6320c761"
+ },
+ "note": "Tool calls of the failed trial, reduced to the fields the authority detector reads. Call 20 wrote to a mistyped shard root (3GanyY for 3GanyU); the agent disclosed it and rewrote the report at the right path.",
+ "calls": [
+  {
+   "tool": "Read",
+   "input": {
+    "file_path": "<HOME>/phase.md"
+   }
+  },
+  {
+   "tool": "Read",
+   "input": {
+    "file_path": "<HOME>/.claude/skills/gstack/ship/sections/documentation.md"
+   }
+  },
+  {
+   "tool": "Read",
+   "input": {
+    "file_path": "<HOME>/ship-invocation.md"
+   }
+  },
+  {
+   "tool": "Read",
+   "input": {
+    "file_path": "<HOME>/candidate-ship-docs-a1.json"
+   }
+  },
+  {
+   "tool": "Read",
+   "input": {
+    "file_path": "<HOME>/completion-ship-docs-a1.md"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> status <HOME>/actor-state.json task_id=fixture-child-1"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> stop <HOME>/actor-state.json task_id=fixture-child-1"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> status <HOME>/actor-state.json task_id=fixture-child-1"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> inspect <HOME>/actor-state.json"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> repair <HOME>/actor-state.json"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "sha256sum <HOME>/.claude/skills/gstack/document-release/SKILL.md <HOME>/.claude/skills/gstack/document-release/sections/audit-scope.md <HOME>/.claude/skills/gstack/document-release/sections/release-body.md"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> prepare <HOME>/actor-state.json audit_id=ship-docs-a2"
+   }
+  },
+  {
+   "tool": "Read",
+   "input": {
+    "file_path": "<HOME>/candidate-ship-docs-a2.json"
+   }
+  },
+  {
+   "tool": "Read",
+   "input": {
+    "file_path": "<HOME>/prompt-ship-docs-a2.md"
+   }
+  },
+  {
+   "tool": "Edit",
+   "input": {
+    "file_path": "<HOME>/ship-invocation.md"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> dispatch <HOME>/actor-state.json audit_id=ship-docs-a2 candidate=<HOME>/candidate-ship-docs-a2.json prompt=<HOME>/prompt-ship-docs-a2.md run_in_background=false"
+   }
+  },
+  {
+   "tool": "Write",
+   "input": {
+    "file_path": "<HOME>/completion-ship-docs-a2.md"
+   }
+  },
+  {
+   "tool": "Bash",
+   "input": {
+    "command": "bun <ACTOR> inspect <HOME>/actor-state.json"
+   }
+  },
+  {
+   "tool": "Edit",
+   "input": {
+    "file_path": "<HOME>/ship-invocation.md"
+   }
+  },
+  {
+   "tool": "Write",
+   "input": {
+    "file_path": "<TYPO_HOME>/ship-report.md"
+   }
+  },
+  {
+   "tool": "Write",
+   "input": {
+    "file_path": "<HOME>/ship-report.md"
+   }
+  }
+ ]
+}
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