fix(agent-hooks): preserve Windows background worker stdin contract

src/main/agent-hooks/grok-replay-guard.test.ts

@@ -104,6 +104,9 @@ describe('Grok vendor hook replay guard', () => {
 
     expectGuardBeforeTransport(claude, WINDOWS_GROK_GUARD, 'echo {}')
     expectGuardBeforeTransport(cursor, WINDOWS_GROK_GUARD, '(echo {})')
+    const backgroundWorkerGuardIndex = claude.indexOf('CLAUDE_JOB_DIR')
+    expect(backgroundWorkerGuardIndex).toBeGreaterThan(-1)
+    expect(backgroundWorkerGuardIndex).toBeLessThan(claude.indexOf(WINDOWS_GROK_GUARD))
   })
 
   it.skipIf(process.platform === 'win32')(

src/main/claude/hook-script.ts

@@ -33,12 +33,12 @@ export function getManagedScript(
       // Why (#11549): the env guards must outrank the Devin skip — the Devin skip parks in more.com,
       // and outside an Orca pane the caller can abandon stdin, so more.com never returns.
       ...buildWindowsHookEnvironmentGuardLines(),
-      ...(options.skipWhenGrokImportsClaude ? buildWindowsGrokReplayGuardLines() : []),
       // Why: a backgrounded session runs in a daemon worker that inherited the dispatching
       // pane's env, so ORCA_PANE_KEY names a pane this session does not run in (#9236).
       // Why exit, not the drain label: the drain parks in more.com and a worker is outside
       // an Orca pane — the abandoned-stdin hang #11549 guards against.
       'if not "%CLAUDE_JOB_DIR%"=="" exit /b 0',
+      ...(options.skipWhenGrokImportsClaude ? buildWindowsGrokReplayGuardLines() : []),
       ...(options.skipWhenDevinImportsClaude
         ? [
             // Why: Devin imports .claude hooks by default; skip Orca's managed hook there so status posts stay attributed to Devin.