Realtime Sync Overview Architects high-concurrency, sub-50ms latency synchronization between distributed clients and servers. Covers WebTransport (HTTP/3) bidirectional streaming, transactional outbox patterns for database-to-sync consistency, CRDTs for collaborative editing, and AI token stream orchestration. Core principles: the database is the source of truth (real-time channels notify, not persist), CRDTs eliminate locking for concurrent edits, and backpressure management prevents UI jitter from high-frequency streams. When to use: Real-time collaborative UIs, pub/sub messaging, WebTransp…