brandkit

---
name: brandkit
description: Generate a complete, accessible brand design system from a brief, as 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.
# `invocation:` was not a field Claude Code reads - unknown frontmatter keys are
# ignored without an error, so these six were auto-invocable the whole time they
# were marked user-only. This is the field that actually does it.
disable-model-invocation: true
---

# Skill: Brand Kit

## Requirements

This skill needs the full UX/UI Agent Skills kit: the gates, the references and
the design-system library. Install it with `npx ux-ui-agent-skills@3.1.0 init`
or as the Claude Code plugin. `npx skills@1.7.6 add` copies the skill folder and
nothing else. Installed that way, this skill runs in **guidance-only mode**: no gate
runs, so it gives no verdict.

> **Step 0: is the kit here?** Check once:
> `ls ${CLAUDE_SKILL_DIR}/../../../tokens >/dev/null 2>&1 && echo KIT_OK || echo KIT_MISSING`
> On `KIT_MISSING`, open your reply with: "Guidance-only mode: the UX/UI Agent
> Skills kit is not installed here, so no gate ran and nothing below is
> measured." Then work from this file and general practice, under three rules.
> Do not guess or cite the contents of a kit file you could not open. State no
> measured number (no contrast ratio, no N/N, no "passes WCAG"): write "not
> verified" where one would go. End with a line `Skipped (kit not installed):`
> that names every gate script this file tells you to run, then the install
> command above.

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
1. **Brief Inference (mandatory)**: name the industry, audience, the one mood adjective, and motion depth (`${CLAUDE_SKILL_DIR}/../../../taste/design-taste.md` → Brief Inference). Pick an anchoring archetype from `${CLAUDE_SKILL_DIR}/../../../taste/aesthetic-systems.md`.
2. **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 `${CLAUDE_SKILL_DIR}/../../../.claude/rules/tokens-and-color.md` → Color Generation.
3. **Semantic layer**: map roles to primitives (`action.primary`/`-hover`/`destructive`, `text.{primary,secondary,on-action,link}`, `surface.{page,card,raised}`, `border.{default,strong}`, `feedback.{success,warning,error,info}`), and the **dark** overrides (designed, not inverted).
4. **Scales**: Major Third type scale + composite text styles, 4px spacing scale, radius tiers, elevation, and `${CLAUDE_SKILL_DIR}/../../../tokens/motion.json`-style durations/easings.
5. **Emit** the DTCG `${CLAUDE_SKILL_DIR}/../../../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 ${CLAUDE_SKILL_DIR}/../../../scripts/validate_tokens.py`: valid JSON, all aliases resolve.
- `python3 ${CLAUDE_SKILL_DIR}/../../../scripts/validate_contrast.py`: required text/action/border pairs pass WCAG AA in **light AND dark**; `border.strong` ≥ 3:1.
- `python3 ${CLAUDE_SKILL_DIR}/../../../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 `${CLAUDE_SKILL_DIR}/../../../taste/design-taste.md`.