prep-browser-session

Sets up the world the diagnose-* skills assume: a running dev server, a real headed Chrome with the React DevTools hook installed, and a session parked on whatever URL the user wants to investigate.

This skill exists so leaf diagnoses (diagnose-error, diagnose-ssr, diagnose-ppr, diagnose-instant-nav) can be invoked standalone without re-implementing the bootstrap. If you've already run it (or [[diagnose-page-load]], which calls it), you don't need to re-run it between leaves — the session persists.

When to invoke