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design-system

design-system is a skill for Claude Code, Codex from BuildGreatProducts/builder-os. It costs 198 tokens per session (4,439 once invoked), scanned A, original, MIT.

A tool that turns screenshots, mockups, Figma links, live websites, or other image references into two matching design-system documents: one for coding agents and one as a browser-based style guide.

In plain words
What is it for?
Use it to capture an existing visual design as reusable tokens and written guidance in docs/design.md, with a human-readable version in docs/design.html.
Why use it?
It records visual choices such as colors and component styles in one shared specification, reducing guesswork and differences between implementation and documentation.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 233repo +1 4mo ago A scan Socket: passSnyk: passSkillSpector: pass 198 tokens original MIT

Good fit Use it to capture an existing visual design as reusable tokens and written guidance in docs/design.md, with a human-readable version in docs/design.html.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/buildgreatproducts/builder-os/design-system
View source ↗ BuildGreatProducts/builder-os
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 BuildGreatProducts/builder-os --skill design-system
Clone the repo
git clone --depth 1 https://github.com/BuildGreatProducts/builder-os

Made for: Claude Code, 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 design-system

README.md
[![agentmods](https://agentmods.dev/badge/skills/buildgreatproducts/builder-os/design-system/github.svg)](https://agentmods.dev/skills/buildgreatproducts/builder-os/design-system)
Your own site
<a href="https://agentmods.dev/skills/buildgreatproducts/builder-os/design-system"><img src="https://agentmods.dev/badge/skills/buildgreatproducts/builder-os/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 design-system

Your own site · 80×15
<a href="https://agentmods.dev/skills/buildgreatproducts/builder-os/design-system"><img src="https://agentmods.dev/badge/skills/buildgreatproducts/builder-os/design-system.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 198 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,439 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. Third-party audits
  • Socket pass 29 Jun 2026
  • Snyk pass 29 Jun 2026
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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 $0.00198 $0.04439
Opus 5.5 $0.00079 $0.01776
Sonnet 5.5 $0.00040 $0.00888
Haiku 4.5 $0.00020 $0.00444

Measured 2mo ago against content hash c3c1410699a0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 2mo 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.

skills/design-system/SKILL.md · 309 lines

How it starts

The opening of the file, as written. The whole thing — 309 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Design System — Image to design.md + design.html

This skill takes an image (or a set of image references) and translates them into a design system captured as two mirrored files:

  • docs/design.md — a YAML token block in Google's open design.md format that gives a coding agent exact implementation values, plus prose rationale explaining the why. This is the source of truth.
  • docs/design.html — a self-contained, human-readable style guide that renders every token and component live in a browser, styled directly from the same token values. This is the mirror the human reads.

Same design system, two audiences: the agent reads the .md, the human opens the .html. They must always be written and updated together so they never drift.

When to Use This

  • Founder shares a screenshot, mockup, Figma file, inspiration board, or live website and wants it captured as a structured design system
  • Founder needs design tokens a coding agent can implement without guessing
  • Founder wants a precise token spec to supplement an existing product vision or PRD
  • Fully standalone — does not require any other document

Modes

No image provided yet: Ask for one (or more) before doing anything else. Don't draft a design.md from imagination.

docs/design.md already exists: Read it (and docs/design.html if present) and ask what they want to do — refine specific tokens or sections, replace it with a fresh analysis from new imagery, or merge the new analysis into the existing tokens. Confirm before destructive overwrites. Whatever changes, regenerate docs/design.html so it stays in sync with the .md.

Partial conversation: If the session is interrupted mid-flow, note where you left off and resume from that step. Don't restart.

Voice

You are a senior design director with strong taste. You're observant — you describe what you actually see in the imagery, not what you assume. You're decisive — when the founder is uncertain, recommend a direction with a one-line rationale. You're systematic — you treat design as a coordinated system of tokens and rules, not just a vibe.

Read the full file on GitHub · 309 lines

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. 2mo ago First seen · 309 lines · 198 tokens per session scan A c3c1410699a0

Subscribe to this mod's changes

design-system is a skill published in the GitHub repository BuildGreatProducts/builder-os (233 stars, last pushed 4mo ago), licensed MIT. It adds 198 tokens to every session and 4,439 once invoked, about $0.0008 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 2026-08-30.

Design and UX
Related

design-system compared with skills from other repositories

design-system next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
design-systemBuildGreatProducts/builder-osSkill2334mo agoMITA198Claude Code, Codex
webgl-holographic-foilnexu-io/open-designSkill106kyesterdayApache-2.0A41Claude Code, Codex
html-ppt-hermes-cyber-terminalnexu-io/open-designSkill106kyesterdayApache-2.0A53Claude Code, Codex
html-ppt-taste-brutalistnexu-io/open-designSkill106kyesterdayApache-2.0A78Claude Code, Codex
visual-ralphYeachan-Heo/oh-my-codexSkill34k3d agoMITA52Codex
glance-canonical-layoutsandroid/skillsSkill10kyesterdayApache-2.0A56Claude Code
accessibilitymicrosoft/hve-coreSkill1.6kyesterdayMITA47Claude Code