Phase 0: SKILL DISCOVERY & REQUIRED READING ⚠️ CRITICAL — UI Design Quality Gate: If the project produces ANY visual HTML output (dashboard, web app, landing page, portfolio, any page the user will see), you MUST the skill's SKILL.md and follow it BEFORE writing any HTML/CSS. This is not optional. project-builder handles engineering; ui-design handles visual quality (and tells you when to reach for a component library like shadcn/ui, HeroUI, or coss ui instead of hand-writing). Skipping ui-design produces generic AI slop. A. Pick the sources and tools. For research and API documentation, use…