PowerLockGuard is an ultra-lightweight (~90 KB), 100% offline Windows utility for overnight AI coding agents (Claude Code, Aider, Python training). Work Watchdog: Monitors AI tasks, auto-kills stuck processes, and safely sleeps your PC when finished so it doesn't run all night. Charger Guard: Instantly deep-sleeps (S3 Standby) on power loss, freezing terminal states and memory in RAM before timeouts corrupt projects or burn expensive tokens.