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mpga-design-system

mpga-design-system is a skill for Claude Code from benrben/MPGA. It costs 18 tokens per session (304 once invoked), scanned A, original, MIT.

A toolkit for defining a project's reusable visual rules, such as colors, spacing, fonts, and screen sizes, plus its shared UI components.

In plain words
What is it for?
Use it to create or add design tokens, list components, find style drift, and check whether code follows the project's design rules.
Why use it?
It helps prevent inconsistent styles, undocumented components, and hardcoded values that should be shared design settings.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the mpga plugin — 18 skills, 26 commands, 3 agents shipped together

not rated 5repo 7mo ago A scan 18 tokens original MIT

Good fit Use it to create or add design tokens, list components, find style drift, and check whether code follows the project's design rules.

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

Made for: Claude Code.

Or install mpga, the plugin that ships this one along with the rest of its 18 skills, 26 commands, 3 agents.

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 mpga-design-system

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

Your own site · 80×15
<a href="https://agentmods.dev/skills/benrben/mpga/design-system"><img src="https://agentmods.dev/badge/skills/benrben/mpga/design-system.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 18 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 304 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 $0.00018 $0.00304
Opus 5.5 $0.00007 $0.00122
Sonnet 5.5 $0.00004 $0.00061
Haiku 4.5 $0.00002 $0.00030

Measured 2mo ago against content hash 369c77543235, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mpga-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.

mpga-plugin/skills/design-system/SKILL.md · 52 lines

What it actually says

design-system

Trigger: The user wants to create a design system, extract tokens from existing styles, add a token, inspect component drift, or audit token compliance.

Modes

init

  • Scan project CSS and style files
  • Extract tokens
  • Generate MPGA/design-system/tokens.json
  • Generate MPGA/design-system/tokens.css

add-token

  • Add a token with name, value, and category
  • Update both tokens.json and tokens.css

catalog

  • List the reusable components in MPGA/design-system/COMPONENTS.md
  • Flag drift:
    • used but undocumented
    • documented but unused

audit

  • Find hardcoded values that should be tokenized
  • Report compliance percentage

Token format

Store categories in JSON:

  • color
  • spacing
  • typography
  • breakpoint

Security

  • Validate values against an allowlist before writing:
    • hex colors
    • px/rem/em values
    • font names
    • numeric-safe breakpoint values
  • Reject dangerous values like url(), expression(), and @import.

Output

  • Updated MPGA/design-system/tokens.json
  • Updated MPGA/design-system/tokens.css
  • Component catalog output
  • Compliance findings when auditing
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 · 52 lines · 18 tokens per session scan A 369c77543235

Subscribe to this mod's changes

mpga-design-system is a skill published in the GitHub repository benrben/MPGA (5 stars, last pushed 7mo ago), licensed MIT. It adds 18 tokens to every session and 304 once invoked, about $0.0001 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.

Design and UX
Related

mpga-design-system compared with skills from other repositories

mpga-design-system next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
mpga-design-systembenrben/MPGASkill57mo agoMITA18Claude Code
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html-ppt-taste-brutalistnexu-io/open-designSkill107ktodayApache-2.0A78Claude Code, Codex
visual-ralphYeachan-Heo/oh-my-codexSkill34kyesterdayMITA52Codex
glance-canonical-layoutsandroid/skillsSkill10ktodayApache-2.0A56Claude Code
accessibilitymicrosoft/hve-coreSkill1.6ktodayMITA47Claude Code