rmyndharis/antigravity-skills ? reverse-engineered prompt

Build me a simple JavaScript tool that acts like a skill vault for Google Antigravity.

I want a curated collection of agent skills that can be searched, listed, installed, updated, and checked from the command line, with a generated catalog so people can browse what’s available. It should support installing skills into a workspace or globally, and it should also work as a plugin for Antigravity so slash commands like list, search, install, installed, and update are available.

Please make the repo feel ready to use, with clear docs, a clean catalog of skills, support for aliases and bundles, and a way to regenerate the catalog after changes. If anything depends on the latest Antigravity or AGY docs, look them up online and follow the current recommended way.