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 agentmods add skills/plugin87/full-stack-design-skills/design-systems-architecturenpx skills add plugin87/full-stack-design-skills --skill design-systems-architecturegit clone --depth 1 https://github.com/plugin87/full-stack-design-skillsWrote 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/plugin87/full-stack-design-skills/design-systems-architecture)<a href="https://agentmods.dev/skills/plugin87/full-stack-design-skills/design-systems-architecture"><img src="https://agentmods.dev/badge/skills/plugin87/full-stack-design-skills/design-systems-architecture.svg" alt="Measured on agentmods" 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 | $0.00108 | $0.03748 |
| Opus 5 | $0.00054 | $0.01874 |
| Sonnet 5 | $0.00022 | $0.00750 |
| Haiku 4.5 | $0.00011 | $0.00375 |
Grade A, and why
design-systems-architecture 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 4d 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 — 518 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Systems Architecture
A practical guide to building, scaling, and maintaining design systems that serve teams and products long-term.
A design system is more than a component library—it's a shared language, a source of truth, and a scalable architecture for consistent digital experiences. This skill covers the principles, organization, and governance that make systems sustainable.
What Is a Design System?
A design system comprises:
Foundation — Design tokens (colors, typography, spacing, etc.) that define the visual language
Components — Reusable UI building blocks (buttons, cards, modals) paired with guidelines
Patterns — Common interaction and layout patterns (forms, navigation, error handling)
Documentation — Clear guidance on when/how to use each piece
Governance — Decision-making framework, versioning, deprecation policy
Tools — Platforms that host, maintain, and distribute the system (Figma, Storybook, npm, etc.)
Design System Principles
1. Atomic Design Methodology
Atomic Design (by Brad Frost) organizes components by complexity:
Atoms (smallest)
- Buttons, labels, inputs, icons
- Standalone; can't be broken down further
- Example:
<button>,<label>,<input />
Molecules (combination of atoms)
- Form field (label + input + error message)
- Card header (icon + title + subtitle)
- Search box (input + icon + button)
- Example:
<FormField>,<CardHeader>
Organisms (combination of molecules + atoms)
- Contact form (multiple form fields + button)
- Header (logo + nav + search box)
- Product card (image + title + description + button)
- Example:
<ContactForm>,<Header>
Templates (layout + organisms, no content)
- Product listing page layout (header + sidebar + product grid)
- Article template (nav + hero + content + footer)
- Example:
<ProductListingTemplate>
Pages (templates + real content)
- Actual product listing page with real products
- Actual article with real text
- Example:
<ProductListingPage>
What ships with it
5 files 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.
- 4d ago First seen · 518 lines · 0 tokens per session scan A 91cd1cecf0fd
design-systems-architecture is a skill published in the GitHub repository plugin87/full-stack-design-skills (10 stars, last pushed 1mo ago), licensed MIT. It adds 108 tokens to every session and 3,748 once invoked, about $0.0005 per session on Opus 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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