diff --git a/packages/store/src/cli/services/store/auth/config.ts b/packages/store/src/cli/services/store/auth/config.ts
index 94ce1f1ea5..46b72e6a7d 100644
--- a/packages/store/src/cli/services/store/auth/config.ts
+++ b/packages/store/src/cli/services/store/auth/config.ts
@@ -7,7 +7,11 @@ export function storeAuthRedirectUri(port: number): string {
 }
 
 export function storeAuthSessionKey(store: string): string {
-  return `${STORE_AUTH_APP_CLIENT_ID}::${store}`
+  return `${STORE_AUTH_APP_CLIENT_ID}::${escapeStoreAuthSessionKeySegment(store)}`
+}
+
+function escapeStoreAuthSessionKeySegment(value: string): string {
+  return value.replace(/\./g, '\\.')
 }
 
 export function maskToken(token: string): string {
diff --git a/packages/store/src/cli/services/store/auth/session-store.ts b/packages/store/src/cli/services/store/auth/session-store.ts
index a039c08edf..0acdb46232 100644
--- a/packages/store/src/cli/services/store/auth/session-store.ts
+++ b/packages/store/src/cli/services/store/auth/session-store.ts
@@ -212,26 +212,6 @@ function readRawStoreSessionStorage(storage: LocalStorage<StoreSessionSchema>):
   return (storage as unknown as {config?: {store?: RawStoreSessionStorage}}).config?.store ?? {}
 }
 
-function collectCurrentStoredStoreAppSessions(
-  storage: LocalStorage<StoreSessionSchema>,
-  store: string,
-  value: unknown,
-  sessions: StoredStoreAppSession[],
-): void {
-  if (!value || typeof value !== 'object' || Array.isArray(value)) return
-
-  const bucket = sanitizeStoredStoreAppSessionBucket(store, value, storage)
-  if (bucket) {
-    const session = bucket.sessionsByUserId[bucket.currentUserId]
-    if (session) sessions.push(session)
-    return
-  }
-
-  for (const [childKey, childValue] of Object.entries(value as RawStoreSessionStorage)) {
-    collectCurrentStoredStoreAppSessions(storage, `${store}.${childKey}`, childValue, sessions)
-  }
-}
-
 /**
  * Internal persistence helper for projecting the current session for every
  * store that has locally stored store auth.
@@ -244,7 +224,10 @@ export function listCurrentStoredStoreAppSessions(
 
   for (const [key, value] of Object.entries(readRawStoreSessionStorage(storage))) {
     if (!key.startsWith(keyPrefix)) continue
-    collectCurrentStoredStoreAppSessions(storage, key.slice(keyPrefix.length), value, sessions)
+
+    const bucket = sanitizeStoredStoreAppSessionBucket(key.slice(keyPrefix.length), value, storage)
+    const session = bucket?.sessionsByUserId[bucket.currentUserId]
+    if (session) sessions.push(session)
   }
 
   return sessions
diff --git a/packages/store/src/cli/services/store/auth/stored-auth.test.ts b/packages/store/src/cli/services/store/auth/stored-auth.test.ts
index f1b8ba6967..c2d1a0f960 100644
--- a/packages/store/src/cli/services/store/auth/stored-auth.test.ts
+++ b/packages/store/src/cli/services/store/auth/stored-auth.test.ts
@@ -66,6 +66,39 @@ describe('listStoredStoreAuthSummaries', () => {
     })
   })
 
+  test('persists dotted store domains as a single top-level key', async () => {
+    await inTemporaryDirectory((cwd) => {
+      const storage = new LocalStorage<Record<string, unknown>>({cwd})
+
+      setStoredStoreAppSession(buildSession(), storage as any)
+
+      const rawStorage = (storage as unknown as {config: {store: Record<string, unknown>}}).config.store
+      expect(Object.keys(rawStorage)).toContain(`${STORE_AUTH_APP_CLIENT_ID}::shop.myshopify.com`)
+      expect(listStoredStoreAuthSummaries(storage as any)).toEqual([
+        {
+          store: 'shop.myshopify.com',
+          userId: '42',
+          scopes: ['read_products'],
+          acquiredAt: '2026-03-27T00:00:00.000Z',
+        },
+      ])
+    })
+  })
+
+  test('ignores legacy nested buckets written with unescaped dotted domains', async () => {
+    await inTemporaryDirectory((cwd) => {
+      const storage = new LocalStorage<Record<string, unknown>>({cwd})
+      storage.set(`${STORE_AUTH_APP_CLIENT_ID}::legacy.myshopify.com`, {
+        currentUserId: '42',
+        sessionsByUserId: {
+          '42': buildSession({store: 'legacy.myshopify.com'}),
+        },
+      })
+
+      expect(listStoredStoreAuthSummaries(storage as any)).toEqual([])
+    })
+  })
+
   test('sorts stores alphabetically when auth timestamps match', async () => {
     await inTemporaryDirectory((cwd) => {
       const storage = new LocalStorage<Record<string, unknown>>({cwd})