/html - Self-Contained HTML Artifacts

Generate single self-contained .html files that replace markdown when the output needs color, interactivity, layout, or visualization. Auto-detect artifact shape from the request, load shape-specific patterns, generate, validate, deliver.

Core constraint: Every artifact is ONE .html file. All CSS in <style>, all JS in <script>. No CDN links, no frameworks, no build steps, no external dependencies. Works offline, opens in any browser.

Instructions

Overview

5-phase pipeline: DETECT SHAPE, LOAD CONTEXT, GENERATE, VALIDATE, DELIVER. Phase 1 classifies the request into one of 8 shapes via deterministic script. Phase 2 loads the Birchline design system plus shape-specific reference. Phase 3 dispatches a subagent to generate the HTML. Phase 4 validates structure. Phase 5 delivers the file path and offers browser preview. Phase 6 EXPORT (optional) renders to PDF when the user asks for one.

Phase 1: DETECT SHAPE

Classify the user's request into one of 8 artifact shapes.