When marketplace-dev is installed, any Write/Edit to a marketplace.json
automatically runs `claude plugin validate` and reports pass/fail.
Users get instant feedback without remembering to validate manually.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Sync check (skills ↔ marketplace.json), metadata audit,
per-plugin validation, and final claude plugin validate gate.
All users installing this skill get these process guards.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>