What is design-system?

A design-system helper that routes Flutter and Angular interface work through shared rules for colours, spacing, typography, accessibility, and interactions. A design system is a common set of visual and usability rules used across an application.

Use it when building screens or components, reviewing interface consistency, checking accessibility, or finding design drift in Flutter and Angular projects. It directs the work to stack-specific standards and design checks.

Separate screens can slowly develop inconsistent styles and behaviour when each change is made independently. This helps keep user-facing interfaces aligned with the project's defined tokens and standards.

design-system — Skill for Claude Code by kumaran-is

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 kumaran-is/claude-code-onboarding --skill design-system

Clone the repo

git clone --depth 1 https://github.com/kumaran-is/claude-code-onboarding

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/design-system/github.svg)](https://agentmods.dev/skills/kumaran-is/claude-code-onboarding/design-system)

Your own site

<a href="https://agentmods.dev/skills/kumaran-is/claude-code-onboarding/design-system"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/kumaran-is/claude-code-onboarding/design-system"><img src="https://agentmods.dev/badge/skills/kumaran-is/claude-code-onboarding/design-system.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 46 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,107 The whole file, excluding the scripts and references it only reads on demand.

Security scan C 1 finding. 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.

Model	Per session	Once invoked
Fable 5.1	$0.00046	$0.03107
Opus 5	$0.00023	$0.01554
Sonnet 5	$0.00009	$0.00621
Haiku 4.5	$0.00005	$0.00311

Measured 6d ago against content hash 74eae7787d75, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade C, and why

design-system scanned grade C with 1 finding 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 6d 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.

Hidden instructionshighPrompt injection

Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.

1. Add inline marker: `// ignore-design: [short reason]` or ``

.claude/skills/design-system/SKILL.md · 204 lines

How it starts

The opening of the file, as written. The whole thing — 204 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Iron Law: Never hardcode colors, spacing, or typography — always use design tokens; run /lint-design-system before declaring any UI change complete.

Design System — Unified Routing Hub

Single entry point for all design system enforcement across Flutter and Angular.

When to use: Any UI task — building screens, reviewing components, auditing design drift, or running design lint.

Routing Table

Determine the stack from file context, then load the correct references:

What are you working on?
    |
    +-- Flutter (lib/**/*.dart, pubspec.yaml)
    |   |
    |   +-- Tokens (colors, spacing, typography, radius)
    |   |   → Read: .claude/skills/ui-standards-tokens/reference/ui-design-tokens.md
    |   |
    |   +-- Accessibility (semantics, focus, contrast)
    |   |   → Read: .claude/skills/ui-standards-tokens/reference/ui-accessibility-patterns.md
    |   |
    |   +-- Polish (animations, glassmorphism, theme extensions)
    |       → Read: .claude/skills/flutter-mobile/reference/flutter-design-polish.md
    |
    +-- Angular (src/app/**/*.ts|html|scss)
    |   |
    |   +-- Component styling (daisyUI classes, semantic tokens)
    |   |   → Read: .claude/skills/angular-spa/reference/daisyui-v5-components.md
    |   |
    |   +-- Tailwind config (spacing, breakpoints, CSS vars)
    |   |   → Read: .claude/skills/angular-spa/reference/tailwind-v4-config.md
    |   |
    |   +-- Conventions (design principles, form patterns)
    |   |   → Read: .claude/skills/angular-spa/reference/angular-conventions.md
    |   |
    |   +-- Animations (timing, keyframes, reduced motion)
    |       → Read: .claude/skills/angular-spa/reference/animations.md
    |
    +-- Cross-stack (interaction contracts, visual direction)
        |
        +-- Surface/interaction contracts (modals, forms, lists, errors)
        |   → Read: .claude/skills/design-system/reference/interaction-contracts.md
        |
        +-- Visual design direction (anti-patterns, typography philosophy)
            → Read: .claude/skills/frontend-design/reference/frontend-design-principles.md

Read the full file on GitHub · 204 lines

Files

What ships with it

1 file 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.

reference/interaction-contracts.md 6.8 KB

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.

6d ago First seen · 204 lines · 46 tokens per session scan C 74eae7787d75

Subscribe to this mod's changes

design-system is a skill published in the GitHub repository kumaran-is/claude-code-onboarding (35 stars, last pushed 2mo ago), licensed MIT. It adds 46 tokens to every session and 3,107 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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