Crash-safe, race-free file writes for Go — TOCTOU protection via fingerprint verification, cross-platform file locking, atomic rename, and fsync for crash durability.
Filesystem notifications and advisory file locks for Go. Pure Go, no cgo, no dependencies beyond golang.org/x/sys. inotify, fanotify, kqueue, ReadDirectoryChangesW and polling behind one API, each verified on real hardware.