Andrew Kane has written over 100 Ruby gems with 374 million downloads, including heavyweights like Searchkick, PgHero, and Strong Migrations. This skill codifies his patterns: minimal dependencies, explicit over clever, Rails integration without Rails coupling. Every gem follows the same entry point structure, the same error handling approach, the same testing setup. If you're building Ruby gems and want to skip the years of refinement that went into Kane's approach, this gives you the blueprint. It's opinionated in the best way, the kind that comes from shipping production code at scale.
npx skills add https://github.com/everyinc/compound-engineering-plugin --skill andrew-kane-gem-writer