This is essentially a PRD generator wrapped in architectural planning. It walks Claude through a structured workflow: clarify requirements, analyze the existing codebase, design a solution with multiple options (minimal, medium, comprehensive), and output a markdown PRD to your project's docs folder. The source is heavily opinionated about avoiding over-engineering, with multiple warnings to look for existing mechanisms before proposing refactors and to always present trade-offs. Worth noting that it includes specific checklist items for debugging refresh logic and state management, suggesting it was built to solve real footguns the author encountered. If you need structured technical specs rather than ad-hoc brainstorming, this gives you that framework.
npx skills add https://github.com/charon-fan/agent-playbook --skill architecting-solutions