GoKawiilsyncular
Server-authoritative, offline-first SQL sync you can operate. Clients keep a real local SQLite database (OPFS in the browser, native SQLite elsewhere), writes go through an optimistic outbox, and one ordered commit log on the server stays the source of truth.
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bun create syncular-app my-app
How the repo is built
Spec-first : SPEC.md is normative and spec/vectors/ are golden fixtures; when spec and code disagree, the code changes. Two cores (TypeScript and Rust) are kept in lockstep by an implementation-agnostic conformance suite.
: is normative and are golden fixtures; when spec and code disagree, the code changes. Two cores (TypeScript and Rust) are kept in lockstep by an implementation-agnostic conformance suite. Test doctrine : loopback in-memory transport for integration scenarios; fault injection at the transport interface; tests wait on explicit readiness signals (sleeps are banned); real-socket tests few and quarantined. See packages/conformance .
: loopback in-memory transport for integration scenarios; fault injection at the transport interface; tests wait on explicit readiness signals (sleeps are banned); real-socket tests few and quarantined. See . One good path: the browser persists to OPFS and reports unsupported environments as errors; sync runs over the WebSocket.
Layout
Path What it is packages/core Protocol codecs, shared types, vector round-trip packages/server handleSyncRequest(bytes, ctx) + storage/auth interfaces (SQLite, Postgres, D1) packages/server-hono , packages/server-workers Framework bindings (Hono, Cloudflare Workers) packages/web-client @syncular/client : TS client core on @sqlite.org/sqlite-wasm packages/react React hooks over the client packages/typegen Schema IR + TypeScript emitter, named queries (cargo-free) packages/crypto , packages/crdt-yjs Per-column E2EE primitives, Yjs CRDT mergers packages/testing @syncular/testkit : in-memory loopback of real server + clients packages/conformance Scenario runner both cores must pass rust/ The Rust client core and its C-ABI FFI crate bindings/ Tauri, React Native, Swift, Kotlin, Flutter apps/docs The docs site (syncular.dev)
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