Recached 0.2.0 — live queries, offline-first sync, native JSON, and it now outruns Redis

[akosidencio]

Recached 0.2.0 is out — the biggest release yet. It turns Recached from "a Redis-compatible cache with a browser mode" into a local-first sync platform with a Redis API.

What's new:

• ⚡ Live queries — useKeys('cart:*') in React or Vue gives a component the current matching keys plus live updates. Server write → diff over WebSocket → local WASM cache → re-render. Zero fetching, zero invalidation code.
• 📴 Offline-first writes — a durable outbox (IndexedDB) queues writes offline, survives page reloads, auto-reconnects with backoff, and replays with exactly-once delivery. Counters merge additively (your +2 and their +3 make +5 — nobody's increments are lost).
• 🔐 Scoped sync — each browser connection sees only the keys its signed token grants. Reads, writes, and pushes are all scoped; minting a token is one createHmac call on your backend.
• 📄 Native JSON — JSET / JGET / JMERGE (RFC 7386 merge patch), no RedisJSON module. A merge from any client updates every connected browser's local document.
• 🚦 Built-in rate limiting — RLCHECK ip:1.2.3.4 100 60 → [allowed, remaining, retry_after_ms], mapping straight onto X-RateLimit-* headers.
• 🏎️ Performance — after this release's hot-path work, Recached beats Redis 7.2.5 on 6 of 7 pipelined commands (GET 546k rps vs 513k) and Valkey on all 7, on the same hardware. Benchmarks & methodology — reproducible with scripts/benchmark.sh.

Also in this release: a platform-neutral sync-client crate (the groundwork for Kotlin/Swift/Flutter/React Native SDKs — next on the roadmap) and a normative wire protocol spec.

Full details in the CHANGELOG. Feedback, benchmarks from your hardware, and bug reports very welcome.