deep-dive

How Comments, Reactions, and Issue Subscriptions Work in Multica: A Technical Deep Dive

April 11, 2026 multica-ai/multica ↗

Multica implements comment reactions and issue subscriptions as first-class database resources with real-time synchronization via REST APIs, PostgreSQL persistence, internal WebSocket broadcasts, and React hooks that maintain optimistic UI states.

The open-source Multica platform treats user engagement—emoji reactions on comments and subscription-based watching of issues—as core entities rather than secondary metadata. This architecture ensures real-time consistency across distributed clients while maintaining data integrity in PostgreSQL. Understanding this implementation reveals how modern full-stack applications coordinate state between backend handlers, database layers, and frontend React components

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