What problem does it solve? Building small web apps usually drags in frameworks, npm installs, and build pipelines. This Skill turns a plain-language request into a self-contained index.html that runs directly in a browser, works offline, and can be shared as a single file. ## Core Features & Use Cases - Scenario and style routing: Selects deliverable types (marketing, prototype, infographic, motion, document, game, presentation) and interaction kinds (tool, dashboard, guided, knowledge) from a natural-language brief, then applies one of 20+ registered visual style families independently. - Scaffold, validate, and build scripts: Generates starter apps with executable kind contracts, runs strict static validation, serves projects locally, and packages results into distributable zip archives. - Optional local AI integration: Connects apps to OpenAI-compatible local model endpoints for text, vision, image, or code capabilities while keeping credentials out of the delivered HTML. - Use Case: Ask for a multi-currency travel expense splitter; the Skill scaffolds a tool-kind app, applies a suitable style, validates it strictly, and delivers a single index.html that works on phones and desktops. ## Quick Start Use html-design to build a word-matching game with a saved high score and touch and keyboard support, delivered as a single index.html file.