Function recoverer_lock_path 

pub fn recoverer_lock_path() -> PathBuf

Advisory lock file used to serialize RECOVERY (kill+respawn) attempts across concurrent clients only — the daemon’s own boot sequence never acquires this file (lock_path / acquire_daemon_boot_guard is the boot-side lock). A recoverer holding this lock across dead-confirmation → kill → spawn (khive-mcp’s kill_and_respawn) therefore can never deadlock against a peer daemon’s boot, unlike holding the shared boot lock for that whole span would.

Overridable via the KHIVE_RECOVERER_LOCK env var (for tests).