Collaborative Sync Engine

Real-time collaborative text editing built from scratch on a CRDT (RGA), with cross-instance sync over Redis Pub/Sub.

status in-progress

stack TypeScript, Node.js, WebSockets, Redis Pub/Sub, Docker

A real-time collaborative text-editing engine being built from scratch using a CRDT (RGA) approach, chosen over operational transforms for provable convergence correctness in a solo build.

problem

Operational transforms need a large, carefully tested transform matrix to stay correct. Getting that right alone is a poor bet.

solution

An RGA-based CRDT, where convergence is a property of the data structure rather than of the transform functions, plus reconnect and diverged-state recovery via state-vector diffing.

architecture

CRDT (RGA) document model
Real-time sync over WebSockets
Redis Pub/Sub for cross-instance broadcast
Reconnect and diverged-state recovery via state-vector diffing
Dockerized services

results

In progress.