- _check_status_one: proper connectivity check per server type
(SSH/SQL/Redis/Grafana/Prometheus/WinRM/RDP)
- ping_server uses _check_status_one instead of paramiko-only
- check_status shows server type column
- skill-ssh.md: allow --add, document it, update --status description
- CLAUDE.md: add --add/--remove/--set-note to command reference
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>