Playground Builder

A playground is a self-contained HTML file with interactive controls on one side, a live preview on the other, and a prompt output at the bottom with a copy button. The user adjusts controls, explores visually, then copies the generated prompt back into Claude.

When to use this skill

When the user asks for an interactive playground, explorer, or visual tool for a topic, especially when the input space is large, visual, or structural and hard to express as plain text.

How to use this skill

1. Identify the playground type from the user's request
2. Load the matching template from templates/:
   • templates/design-playground.md, Visual design decisions (components, layouts, spacing, color, typography)
   • templates/data-explorer.md, Data and query building (SQL, APIs, pipelines, regex)
   • templates/concept-map.md, Learning and exploration (concept maps, knowledge gaps, scope mapping)
   • templates/document-critique.md, Document review (suggestions with approve/reject/comment workflow)
   • templates/diff-review.md, Code review (git diffs, commits, PRs with line-by-line commenting)
   • templates/code-map.md, Codebase architecture (component relationships, data flow, layer diagrams)
3. Follow the template to build the playground. If the topic doesn't fit any template cleanly, use the one closest and adapt.
4. Open in browser. After writing the HTML file, run open <filename>.html to launch it in the user's default browser.

Core requirements (every playground)