brandkit - SKILL.md Agent Skill

name: brandkit description: Generate a complete, accessible brand design system from a brief — primitive → semantic → component DTCG tokens (color, type, spacing, radius, shadow, motion), light + dark, plus a single theme.css — verified for WCAG. Use when the user wants a from-scratch brand/design foundation, a new palette + type system, or a themeable token kit for a product.

Skill: Brand Kit

Stand up the foundation (one token system everything renders from) before any screen. Get this right and every page stays consistent and themeable from one place.

Steps

Brief Inference (mandatory) — name the industry, audience, the one mood adjective, and motion depth (taste/design-taste.md → Brief Inference). Pick an anchoring archetype from taste/aesthetic-systems.md.
Primitives — generate the brand color ramp in OKLCH (11 shades, consistent chroma) + a neutral ramp; verify the 500 shade ≥ 4.5:1 on white (text) and 600 ≥ 3:1 (UI) per CLAUDE.md Color Generation.
Semantic layer — map roles to primitives: action.primary/-hover/destructive, text.{primary,secondary,on-action,link}, surface.{page,card,raised}, border.{default,strong}, feedback.{success,warning,error,info} — and the dark overrides (designed, not inverted).
Scales — Major Third type scale + composite text styles, 4px spacing scale, radius tiers, elevation, and tokens/motion.json-style durations/easings.
Emit the DTCG tokens/*.json (3-tier) + a single theme.css (the one shared source, [data-theme="dark"] overrides). Optionally feed the token-build pipeline (token-build skill) for other platforms.

Verification (definition of done)

python3 scripts/validate_tokens.py — valid JSON, all aliases resolve.
python3 scripts/validate_contrast.py — required text/action/border pairs pass WCAG AA in light AND dark; border.strong ≥ 3:1.
python3 scripts/validate_theme_refs.py — every component var(--…) resolves to the theme.
One theme, no per-page palettes; destructive = danger token (not primary); zero hardcoded values.

Output is a verified token foundation — the measurable part is provable (run npm run verify). Brand "feel" still benefits from a human review against taste/design-taste.md.