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 Zate/cc-plugins --skill design-systemgit clone --depth 1 https://github.com/Zate/cc-pluginsWrote 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/zate/cc-plugins/design-system)<a href="https://agentmods.dev/skills/zate/cc-plugins/design-system"><img src="https://agentmods.dev/badge/skills/zate/cc-plugins/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/zate/cc-plugins/design-system"><img src="https://agentmods.dev/badge/skills/zate/cc-plugins/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 | $0.00054 | $0.02595 |
| Opus 5.5 | $0.00022 | $0.01038 |
| Sonnet 5.5 | $0.00011 | $0.00519 |
| Haiku 4.5 | $0.00005 | $0.00260 |
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 1mo 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.
How it starts
The opening of the file, as written. The whole thing — 239 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Diagram Design System
Universal design principles for professional-quality diagrams. These rules apply regardless of output format (SVG, Mermaid, Excalidraw, D2). Format-specific skills handle syntax; this skill handles aesthetics and composition.
Color
Palette Size
Use 3-5 colors plus grays per diagram. Maximum 7 distinct colors. Beyond that, humans cannot distinguish and remember meanings. If you need more categories, use shade variations within a hue family rather than adding new hues.
Semantic Color Conventions
Use color to convey meaning, not decoration. These associations are widely understood in software engineering:
| Concept | Color | Light Theme Hex | Use For |
|---|---|---|---|
| Platform / Core | Blue | #2563EB |
Primary system components, APIs, services |
| Data / Storage | Blue (darker) | #1E40AF |
Databases, data stores, caches |
| Success / Healthy | Green | #16A34A |
Active states, successful flows, admin |
| Security / Error | Red | #DC2626 |
Threats, errors, denied paths, trust boundaries |
| Warning / Caution | Amber | #D97706 |
Deprecations, risks, attention needed |
| Compute / Processing | Purple | #7C3AED |
Processing nodes, AI/ML, observability |
| External / Third-Party | Teal | #0891B2 |
External systems, integrations, users |
| Inactive / Deprecated | Gray | #6B7280 |
Disabled, archived, low-priority |
| Infrastructure | Slate | #475569 |
Foundational platform, network |
Color-Blind Safe Palette
8% of males have color vision deficiency. Always follow these rules:
- Never rely on color alone -- pair with shape, pattern, label, or icon
- Avoid red-green adjacency without additional differentiation
- Preferred safe palettes:
- IBM:
#648FFF,#785EF0,#DC267F,#FE6100,#FFB000 - Wong:
#E69F00,#56B4E9,#009E73,#F0E442,#0072B2,#D55E00,#CC79A7
- IBM:
Contrast (WCAG AA)
- Normal text on backgrounds: contrast ratio >= 4.5:1
- Large text (18px+ or 14px bold): >= 3:1
- Non-text elements (borders, icons, chart segments): >= 3:1 against adjacent colors
- White text on gradient fills (#0052CC, #006644, #5243AA) meets AA
- Never place mid-tone text on mid-tone backgrounds
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.
- 1mo ago First seen · 239 lines · 54 tokens per session scan A 74da706813ad
design-system is a skill published in the GitHub repository Zate/cc-plugins (10 stars, last pushed 2mo ago), licensed MIT. It adds 54 tokens to every session and 2,595 once invoked, about $0.0002 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.
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