Read worker audit from the shared session store

Author: TheGreatAxios

docs/IMPLEMENTATION.md

@@ -400,9 +400,9 @@ Session runtime state lives under the global projects tree (not in the repo):
 - Migration: if a session exists only under in-repo `.agent-state/<session-id>/`, it is moved into the global tree on open/list
 - Atomic JSON writes with schema validation on load
 
-**Worker audit persistence.** Workers initialize a real `@intx/storage-isogit`
-`AuditStore` at `<worker-workdir>/audit-store` (`src/subagent/run.ts`), separate
-from the native context store's Git index. Initialization failure prevents worker
+**Worker audit persistence.** Workers get context and audit from one
+`createSessionStores` call on the worker workdir: the same isomorphic-git
+repo, one index. Initialization failure prevents worker
 execution. The existing agent-owned audit and error collectors persist at
 checkpoint and shutdown; retained worker sessions flush at checkpoint/resume and
 close. The parent still supplies `noopAuditStore()`: collectors exist there too,

tests/integration/subagent-permission.test.ts

@@ -42,7 +42,7 @@ async function withWorker(
   const cwd = await mkdtemp(join(tmpdir(), "worker-permission-"));
   const harness = setupHarness();
   const workdirBase = join(cwd, "state");
-  const auditPath = join(workdirBase, "subagents", "worker", "audit-store");
+  const auditPath = join(workdirBase, "subagents", "worker");
   const params: RunSubAgentParams = {
     id: "worker",
     cwd,
@@ -703,7 +703,7 @@ test.serial(
         if (nested === undefined) throw new Error("missing nested worker");
         expect(nested.finishedAt).toBeDefined();
         expect(await Bun.file(join(cwd, "probe.txt")).exists()).toBe(false);
-        const auditPath = join(params.workdirBase, "subagents", nested.id, "audit-store");
+        const auditPath = join(params.workdirBase, "subagents", nested.id);
         const store = await createIsogitStore(auditPath);
         const [sessionId] = await readdir(join(auditPath, "state", "audit"));
         if (sessionId === undefined) throw new Error("missing nested audit");