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.
npx skills add kumaran-is/claude-code-onboarding --skill design-systemgit clone --depth 1 https://github.com/kumaran-is/claude-code-onboardingWrote 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.
[](https://agentmods.dev/skills/kumaran-is/claude-code-onboarding/design-system)<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.
<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>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 5.5 | $0.00018 | $0.01243 |
| Sonnet 5.5 | $0.00009 | $0.00621 |
| Haiku 4.5 | $0.00005 | $0.00311 |
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 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.
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 `<!-- ignore-design: [reason] -->` 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
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.
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.
- 2mo ago First seen · 204 lines · 46 tokens per session scan C 74eae7787d75
design-system is a skill published in the GitHub repository kumaran-is/claude-code-onboarding (36 stars, last pushed 4mo ago), licensed MIT. It adds 46 tokens to every session and 3,107 once invoked, about $0.0002 per session on Opus 5.5. 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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