One Go interface, five backends — filelock, flock, Redis, Postgres, etcd. Distributed locks with fencing tokens, semaphore mode, observability hooks, and TraceID propagation. Swap backends with one line.
World-class cache library for Go: bytes-level interface, generics, single-flight Remember (refresh-ahead/SWR/stale-if-error/negative/jitter), distributed Locker, pluggable codecs incl. AES-GCM, cross-process invalidation, resilience decorators, shared conformance suite. Zero deps in core.