refactor: extract storage path state

lib/storage.ts

@@ -43,6 +43,10 @@ import {
 	migrateV1ToV3,
 	type RateLimitStateV3,
 } from "./storage/migrations.js";
+import {
+	getStoragePathState,
+	setStoragePathState,
+} from "./storage/path-state.js";
 import {
 	findProjectRoot,
 	getConfigDir,
@@ -345,31 +349,6 @@ async function ensureGitignore(storagePath: string): Promise<void> {
 	}
 }
 
-type StoragePathState = {
-	currentStoragePath: string | null;
-	currentLegacyProjectStoragePath: string | null;
-	currentLegacyWorktreeStoragePath: string | null;
-	currentProjectRoot: string | null;
-};
-
-let currentStorageState: StoragePathState = {
-	currentStoragePath: null,
-	currentLegacyProjectStoragePath: null,
-	currentLegacyWorktreeStoragePath: null,
-	currentProjectRoot: null,
-};
-
-const storagePathStateContext = new AsyncLocalStorage<StoragePathState>();
-
-function getStoragePathState(): StoragePathState {
-	return storagePathStateContext.getStore() ?? currentStorageState;
-}
-
-function setStoragePathState(state: StoragePathState): void {
-	currentStorageState = state;
-	storagePathStateContext.enterWith(state);
-}
-
 export function setStorageBackupEnabled(enabled: boolean): void {
 	storageBackupEnabled = enabled;
 }

lib/storage/path-state.ts

@@ -0,0 +1,30 @@
+import { AsyncLocalStorage } from "node:async_hooks";
+
+export type StoragePathState = {
+	currentStoragePath: string | null;
+	currentLegacyProjectStoragePath: string | null;
+	currentLegacyWorktreeStoragePath: string | null;
+	currentProjectRoot: string | null;
+};
+
+const storagePathStateContext = new AsyncLocalStorage<StoragePathState>();
+
+let currentStorageState: StoragePathState = {
+	currentStoragePath: null,
+	currentLegacyProjectStoragePath: null,
+	currentLegacyWorktreeStoragePath: null,
+	currentProjectRoot: null,
+};
+
+export function getStoragePathState(): StoragePathState {
+	// Keep the last synchronously assigned state as a fallback until enterWith()
+	// has propagated through the current async chain. This is intentionally a
+	// best-effort bridge for immediate reads; callers should still set state
+	// before spawning child work and treat AsyncLocalStorage as the source of truth.
+	return storagePathStateContext.getStore() ?? currentStorageState;
+}
+
+export function setStoragePathState(state: StoragePathState): void {
+	currentStorageState = state;
+	storagePathStateContext.enterWith(state);
+}