Template
- tokens.css: full token layer (type scale rem-based, palette, spacing, radii) - App.css rebuilt token-driven; zero hardcoded colors/px font sizes - readability preset: --root-font-size 112%; button matrix scrolls when narrow - App.tsx split into real components (Hero, CodeSample, RightRail + reflow) - light theme via [data-theme=light] overrides; topbar sun/moon toggle persisted - scripts/check-tokens.mjs + npm run check (lint, token guard, tsc, build) - AGENTS.md: token contract, check gate, preview workflow