build-design-system

build-design-system is a skill for Codex from HYEXE/codex-plugins. It costs 178 tokens per session (1,067 once invoked), scanned A, original, Apache-2.0.

A workflow for building or organising a design system: the shared rules, tokens, components, themes, and documentation used across an interface. It covers CSS variables, DTCG tokens, Style Dictionary, Storybook, dark mode, and gradual migration.

In plain words
What is it for?
Use it to create or tidy a component library, define design tokens and states, support dark or brand themes, document components, or migrate an existing frontend gradually.
Why use it?
It helps reduce duplicated components and unclear visual rules while keeping design decisions, component APIs, documentation, and tests aligned.

Skill for Codex

Written for Codex: agents/openai.yaml present.

Good fit Use it to create or tidy a component library, define design tokens and states, support dark or brand themes, document components, or migrate an existing frontend gradually.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hyexe/codex-plugins/build-design-system
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add HYEXE/codex-plugins --skill build-design-system
Clone the repo
git clone --depth 1 https://github.com/HYEXE/codex-plugins

Made for: Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for build-design-system

README.md
[![agentmods](https://agentmods.dev/badge/skills/hyexe/codex-plugins/build-design-system/github.svg)](https://agentmods.dev/skills/hyexe/codex-plugins/build-design-system)
Your own site
<a href="https://agentmods.dev/skills/hyexe/codex-plugins/build-design-system"><img src="https://agentmods.dev/badge/skills/hyexe/codex-plugins/build-design-system/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for build-design-system

Your own site · 80×15
<a href="https://agentmods.dev/skills/hyexe/codex-plugins/build-design-system"><img src="https://agentmods.dev/badge/skills/hyexe/codex-plugins/build-design-system.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 178 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,067 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00178 $0.01067
Opus 5.5 $0.00071 $0.00427
Sonnet 5.5 $0.00036 $0.00213
Haiku 4.5 $0.00018 $0.00107

Measured 1mo ago against content hash 44df8d347585, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

build-design-system scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/uiux-advisor/skills/build-design-system/SKILL.md · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Design System Builder

기존 제품의 언어와 API를 보존하면서 토큰, 컴포넌트, 문서와 검증이 같은 진실 원본을 공유하게 만든다. 새 라이브러리 도입보다 현재 시스템의 중복과 계약 공백을 먼저 해결한다.

시작 절차

  1. 저장소 지침, 현재 diff, package와 lockfile, 스타일 도구, framework, build·test 명령을 확인한다.

  2. 기존 CSS 변수, theme, token, primitive, component, Storybook·문서와 소비 경로를 검색해 실제 사용량을 기록한다.

  3. 구현 전에 다음 시스템 계약을 작성한다.

    소비자와 지원 platform:
    진실 원본과 생성 산출물:
    primitive·semantic·component token 계층:
    component API와 state 계약:
    theme·brand·dark mode 전략:
    호환성·버전·마이그레이션:
    문서·테스트·완료 기준:
    
  4. 도구 후보가 필요하면 이 스킬 디렉터리를 기준으로 ../uiux-advisor/scripts/search_toolkits.py에서 role과 ecosystem을 검색하고, 실제 도입 전 공식 문서를 다시 확인한다.

  5. 시스템 경계와 점진적 이행은 references/design-system-workflow.md를 읽는다.

  6. token·component API 설계는 references/token-and-component-contracts.md를 읽는다.

  7. React·Vue·Svelte·vanilla 적용 차이는 references/framework-adapters.md를 읽는다.

구현 원칙

  • primitive token을 제품 의미에 직접 노출하지 말고 semantic token을 안정적인 소비 계약으로 둔다.
  • component token은 실제 반복과 독립적 변화 요구가 있을 때만 추가한다.
  • color, spacing, typography만이 아니라 focus, motion, elevation, radius와 상태 표현도 계약에 포함한다.
  • component API는 appearance와 behavior, content와 layout, controlled와 uncontrolled state를 구분한다.
  • hover·focus·active·disabled·loading·error·empty·selected와 reduced-motion 상태를 문서와 테스트에 포함한다.
  • 기존 공개 API와 token 이름을 한 번에 교체하지 않는다. alias, deprecation, codemod 또는 단계별 소비자 이전을 설계한다.
  • 생성 산출물을 직접 편집하지 않는다. source token과 build pipeline의 소유권을 분명히 한다.
  • Storybook, Style Dictionary나 새 package는 현재 프로젝트의 필요와 기존 도구로 해결할 수 없는 경우에만 추가한다.
  • 웹 전용 시스템에서 불필요한 multi-platform pipeline을 만들지 않는다.

검증

  1. token schema, alias cycle, 누락 reference, 생성물 재현성과 source/build drift를 검사한다.
  2. component별 정상·경계·오류 상태와 keyboard, focus, screen reader, touch, zoom을 검증한다.
  3. light·dark·고대비·브랜드 theme와 긴 콘텐츠, RTL, 작은 화면을 확인한다.
  4. 관련 unit·interaction·visual regression, 타입 검사, 린트와 build를 실행한다.
  5. 변경된 token과 component의 소비자를 찾아 호환성 영향과 migration 상태를 확인한다.
  6. 추가 의존성, 번들·CSS 변화, 라이선스와 현재 지원 framework를 보고한다.

경계

  • 디자인 시스템 원칙이나 token 계층을 설명만 하면 uiux-advisor를 사용한다.
  • 기존 시스템의 문제를 식별하고 우선순위만 정하면 uiux-auditor를 사용한다.
  • 한 화면의 hero, 배경, 카드와 텍스트 효과를 조합하면 compose-creative-ui를 사용한다.
  • 단일 component의 시각 전환이 핵심이면 implement-ui-motion을 사용한다.
  • 단일 widget의 keyboard, focus, touch, gesture와 비동기 상태 동작이 핵심이면 implement-ui-interaction을 사용한다.
  • chart component의 데이터 의미와 시각 인코딩이 핵심이면 build-data-visualization을 사용한다.

Read the full file on GitHub · 60 lines

Files

What ships with it

5 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 1mo ago First seen · 60 lines · 178 tokens per session scan A 44df8d347585

Subscribe to this mod's changes

build-design-system is a skill published in the GitHub repository HYEXE/codex-plugins (0 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 178 tokens to every session and 1,067 once invoked, about $0.0007 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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