- Add validation in ValidateWithCustomStatuses() requiring deleted_at for tombstones - Add validation that non-tombstones cannot have deleted_at set - Block direct status update to tombstone in validateStatusWithCustom() - Users must use 'bd delete' instead of 'bd update --status=tombstone' 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>