Antv Skills Maintainer

This is a meta-maintenance skill that keeps your skill repository documentation in sync automatically. Every time you add, update, or remove a skill, it scans the skills directory and updates both the README's Available Skills section and the marketplace.json plugins array to match what's actually there. The clever bit is it runs on every code change via an "always" trigger, so you never have to manually maintain those manifest files. It's explicitly internal only and tells you not to list it alongside user-facing skills. If you're building a collection of Claude skills and tired of forgetting to update the registry files, this handles the busywork.