design-system

design-system is a skill for Claude Code from nota-america/forgecat-agent-profiles. It costs 52 tokens per session (1,340 once invoked), scanned A, a copy of design-system, Apache-2.0.

A tool for checking and documenting a design system—a shared set of colours, typography, spacing, reusable components, and interaction rules. It can also help design new patterns that fit the existing system.

In plain words
What is it for?
Use it to audit naming and hardcoded values, document components, and extend patterns for forms, navigation, and other reusable interface elements.
Why use it?
It helps keep interfaces consistent and makes component behaviour, variants, states, and accessibility requirements easier for teams to maintain.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Good fit Use it to audit naming and hardcoded values, document components, and extend patterns for forms, navigation, and other reusable interface elements.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nota-america/forgecat-agent-profiles/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 nota-america/forgecat-agent-profiles --skill design-system
Clone the repo
git clone --depth 1 https://github.com/nota-america/forgecat-agent-profiles

Made for: Claude Code.

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/nota-america/forgecat-agent-profiles/design-system/github.svg)](https://agentmods.dev/skills/nota-america/forgecat-agent-profiles/design-system)
Your own site
<a href="https://agentmods.dev/skills/nota-america/forgecat-agent-profiles/design-system"><img src="https://agentmods.dev/badge/skills/nota-america/forgecat-agent-profiles/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/nota-america/forgecat-agent-profiles/design-system"><img src="https://agentmods.dev/badge/skills/nota-america/forgecat-agent-profiles/design-system.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,340 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 94% copy Near-identical to another mod 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 $0.00052 $0.01340
Opus 5 $0.00026 $0.00670
Sonnet 5 $0.00010 $0.00268
Haiku 4.5 $0.00005 $0.00134

Measured 8d ago against content hash 9a2bf83e8b68, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, 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 8d 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.

Origin

This is a copy

94% identical to design-system — 7 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

profiles/anthropics/knowledge-work-plugins/anthropics_knowledge-work-plugins_design/for-claude/.claude/skills/design-system/SKILL.md · 194 lines

How it starts

The opening of the file, as written. The whole thing — 194 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/design-system

If you see unfamiliar placeholders or need to check which tools are connected, see CONNECTORS.md (.forgecat/profiles/@forgecat/anthropics_knowledge-work-plugins_design/CONNECTORS.md).

Manage your design system — audit for consistency, document components, or design new patterns.

Usage

/design-system audit                    # Full system audit
/design-system document [component]     # Document a component
/design-system extend [pattern]         # Design a new component or pattern

Components of a Design System

Design Tokens

Atomic values that define the visual language:

  • Colors (brand, semantic, neutral)
  • Typography (scale, weights, line heights)
  • Spacing (scale, component padding)
  • Borders (radius, width)
  • Shadows (elevation levels)
  • Motion (durations, easings)

Components

Reusable UI elements with defined:

  • Variants (primary, secondary, ghost)
  • States (default, hover, active, disabled, loading, error)
  • Sizes (sm, md, lg)
  • Behavior (interactions, animations)
  • Accessibility (ARIA, keyboard)

Patterns

Common UI solutions combining components:

  • Forms (input groups, validation, submission)
  • Navigation (sidebar, tabs, breadcrumbs)
  • Data display (tables, cards, lists)
  • Feedback (toasts, modals, inline messages)

Principles

  1. Consistency over creativity — The system exists so teams don't reinvent the wheel
  2. Flexibility within constraints — Components should be composable, not rigid
  3. Document everything — If it's not documented, it doesn't exist
  4. Version and migrate — Breaking changes need migration paths

Output — Audit

## Design System Audit

### Summary
**Components reviewed:** [X] | **Issues found:** [X] | **Score:** [X/100]

### Naming Consistency
| Issue | Components | Recommendation |
|-------|------------|----------------|
| [Inconsistent naming] | [List] | [Standard to adopt] |

### Token Coverage
| Category | Defined | Hardcoded Values Found |
|----------|---------|----------------------|
| Colors | [X] | [X] instances of hardcoded hex |
| Spacing | [X] | [X] instances of arbitrary values |
| Typography | [X] | [X] instances of custom fonts/sizes |

### Component Completeness
| Component | States | Variants | Docs | Score |
|-----------|--------|----------|------|-------|
| Button | ✅ | ✅ | ⚠️ | 8/10 |
| Input | ✅ | ⚠️ | ❌ | 5/10 |

### Priority Actions
1. [Most impactful improvement]
2. [Second priority]
3. [Third priority]

Read the full file on GitHub · 194 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. 8d ago First seen · 194 lines · 52 tokens per session scan A 9a2bf83e8b68

Subscribe to this mod's changes

design-system is a skill published in the GitHub repository nota-america/forgecat-agent-profiles (66 stars, last pushed yesterday), licensed Apache-2.0. It adds 52 tokens to every session and 1,340 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to design-system, differing in 7 lines, and is treated as a copy.

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