internal/

Package atomicfile writes files atomically via temp file + rename.

Package delta implements rsync-style rolling checksums and block matching for efficient partial file transfers.

Package index provides a persistent file index used for offline deletion detection and last-writer-wins conflict resolution.

Package pathutil provides shared relative-path validation for the sync tree.

Package peer implements persistent QUIC peer connections: shared UDP transports, connection-scoped Hello, roster coordination, and discovery.

Package proto defines the tailsync peer wire protocol (length-prefixed JSON messages with optional binary payloads).

Package scan walks a sync directory and reconciles it with the local index.