Firebase AI Logic / Vertex AI (src/ai).

Google Analytics (src/analytics).

App Check (src/app-check).

Authentication (src/auth).

Router auth guards (src/auth-guard).

Build, bundling, packaging, release pipeline.

(retired) — do not apply.

Compatibility layer for the pre-modular API (src/compat).

FirebaseApp DI core (src/app).

Data Connect (src/data-connect).

Realtime Database (src/database).

Documentation.

(retired) compat-era label — do not apply.

Cloud Firestore (src/firestore).

Callable Cloud Functions (src/functions).

(retired) ecosystem label — do not apply.

Cloud Messaging / FCM (src/messaging).

Doesn't clearly map to a module or cross-cutting area.

Performance Monitoring (src/performance).

(retired) — do not apply.

Remote Config (src/remote-config).

ng add / deploy schematics (src/schematics).

Server-side rendering, hydration, @angular/ssr interop.

Cloud Storage (src/storage).

TypeScript type correctness across the public API.