@concile/sync

The WebSocket sync tier of the Concile engine: reactive query subscriptions and the protocol that serves them.

This package implements the version-bracketed sync protocol, the subscription manager that tracks each session's live queries, and the protocol handler that re-runs and pushes query results when a committed write intersects a subscription's recorded read set — range-precise invalidation, so a write only wakes the subscriptions whose data it actually touched. It also handles reconnect resume (unchanged results are acknowledged with a small marker instead of resent, and briefly disconnected subscriptions can skip re-execution entirely) and per-session backpressure so a slow client cannot stall the engine.

It talks only to abstract socket and executor interfaces, so the same code serves an embedded single-process engine or a multi-node deployment.

This is an internal package of the Concile engine. Most applications should install concile instead.

Part of Concile — docs at https://concile-six.vercel.app/docs

License: FSL-1.1-Apache-2.0