Build throwaway HTML or UI prototypes to answer design questions.
npx skills add https://github.com/YYG501/PM-AI-Harness --skill prototype-yyg501
Please help me install this Agent Skill. Skill: prototype Source: https://github.com/YYG501/PM-AI-Harness/tree/main/vendor/mattpocock-skills/skills/engineering/prototype Command: npx skills add https://github.com/YYG501/PM-AI-Harness --skill prototype-yyg501
?variant= URL param and a floating bottom bar with arrow-key cycling, mounted inside an existing page when possible. - Capture Workflow: Fold validated decisions into real code and preserve the prototype on a throwaway branch as a primary source, keeping main clean. - Use Case: A PM is unsure whether an order state machine handles cancellation-after-payment. The Skill builds a one-file HTML demo with scenario walkthroughs so the team can click through the awkward cases and spot the flawed transition. ## Quick Start Ask the AI to build a throwaway prototype that answers whether your state model or page layout feels right, and let it pick the logic or UI branch.High-intent search queries and answers about installing and using this skill.
Build a single self-contained HTML file with a pure reducer or state machine in one script block, plus buttons that dispatch actions and re-render the current state. Add tabbed guided walkthroughs for edge cases so non-developers can click through scenarios.
Render several structurally different variants on the same route, gated by a ?variant= URL search param, with a floating bottom bar to cycle between them. Keep existing data fetching intact and only swap the rendered subtree per variant.
Logic prototypes should be one plain HTML file with no framework, bundler, or server so anyone can double-click to open it. UI prototypes follow the host project's existing framework and component library so variants sit realistically inside the app.
Skip prototyping when the question is already answered or when the code would need tests, persistence, or error handling to be meaningful. A prototype answers exactly one question; if it needs production concerns, it has stopped being a prototype.
Fold the validated decision into the real codebase, then commit the full prototype to a throwaway branch outside main as a primary source. Leave a pointer to that branch on the implementation issue and record the verdict.
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