In-App Notifications — Fullstack

Discovery

Infer from context, then confirm:

1. What triggers notifications? — User actions (someone liked your post), system events (job finished), or both?
2. Delivery requirement? — Real-time (SSE/WebSocket already in use) or near-real-time (polling acceptable)?
3. Persistence required? — Should notifications survive page reload / be accessible later, or ephemeral?
4. Multi-device? — Does marking read on one device need to sync to others?

Architecture Overview

Four distinct responsibilities — keep them separate: