If you're building Claude skills at any scale, you need this. It walks you through the entire lifecycle: requirements gathering, architecture planning (linear, router, methodology, widget, or API wrapper patterns), writing the SKILL.md with proper detection flows, creating reference files, and scoring against a quality rubric. The core philosophy is sound: skills must detect available tools at runtime and adapt, never hardcode. Every parameter needs an explicit default, every step needs a pass/fail gate, and complexity goes in reference files to keep the main skill under 250 lines. Opinionated in the right ways.
npx skills add https://github.com/himself65/finance-skills --skill skill-creator