Addresses 5 verified findings from /code-review high:
- SynoError carries DSM code + handled flag; call() no longer logs eagerly.
Top-level handler logs only genuine unhandled failures, so the handled
FileStation denial + VPN-down connect errors stop polluting errorlog.md
(was a CLAUDE.md rule violation: don't log handled conditions).
- FileStation-denial detection is numeric (code in 400/407), not substring.
- SSH hint now also fires on the generic `call` path, not just `ls`.
- `services` falls back get->list on 103 for older DSM builds (multi-device).
- BrokenPipe flush moved inside try so small piped output can't leak a traceback.
- Trim SKILL description 755->515 chars (was the longest of 32 skills; self-check
registry-budget WARN).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Howard Enos
974be13f4c