- Add force_kill_teammate tool for immediate teammate removal
- Add process_shutdown_approved tool for graceful shutdown processing
- Both tools validate team-lead protection and teammate status
- Comprehensive test coverage with 8 test cases
- Task 10/25 complete
- Implement CRUD operations for team config.json
- Use atomic writes with temp+rename pattern
- Reuse acquireLock for concurrent access safety
- Team config lives at ~/.sisyphus/teams/{teamName}/config.json
- deleteTeamDir removes team + inbox + task dirs recursively
- Fix timestamp: use ISO string instead of number
- 4 comprehensive tests with locking verification
Task 4/25 complete