setup — Machine-Level Install Check

This is a machine setup, run once per machine, not per project. It verifies the installed plugin's agents and their preloaded skills resolve, offers one optional user-tier setting, and reports one dotfiles line the user may want to add themselves.

Idempotent — safe to re-run. It reads before it writes and it asks before every write.

NO WRITE WITHOUT AN EXPLICIT ANSWER FROM THE USER FIRST. Every write in this skill is optional. Asking costs one question; a silent write to a settings file the user shares across every project costs them keys they cannot restore.

NO SETTINGS WRITE WITHOUT PARSING THE FILE FIRST — A FILE THAT FAILS TO PARSE IS A REFUSAL, NEVER AN OVERWRITE. A malformed settings file is far more likely to be mid-edit in another window than to be garbage. Overwriting it destroys work and looks like success.