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 app-builders-club/design-builder --skill design-system-rulesgit clone --depth 1 https://github.com/app-builders-club/design-builderWrote 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/app-builders-club/design-builder/design-system-rules)<a href="https://agentmods.dev/skills/app-builders-club/design-builder/design-system-rules"><img src="https://agentmods.dev/badge/skills/app-builders-club/design-builder/design-system-rules/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/app-builders-club/design-builder/design-system-rules"><img src="https://agentmods.dev/badge/skills/app-builders-club/design-builder/design-system-rules.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 | $0.00071 | $0.03972 |
| Opus 5 | $0.00036 | $0.01986 |
| Sonnet 5 | $0.00014 | $0.00794 |
| Haiku 4.5 | $0.00007 | $0.00397 |
Grade A, and why
figma-create-design-system-rules 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 10d 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.
This is a copy
86% identical to figma-create-design-system-rules — 32 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.
How it starts
The opening of the file, as written. The whole thing — 539 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Create Design System Rules
Overview
This skill helps you generate custom design system rules tailored to your project's specific needs. These rules guide AI coding agents to produce consistent, high-quality code when implementing Figma designs, ensuring that your team's conventions, component patterns, and architectural decisions are followed automatically.
Supported Rule Files
| Agent | Rule File |
|---|---|
| Claude Code | CLAUDE.md |
| Codex CLI | AGENTS.md |
| Cursor | .cursor/rules/figma-design-system.mdc |
What Are Design System Rules?
Design system rules are project-level instructions that encode the "unwritten knowledge" of your codebase - the kind of expertise that experienced developers know and would pass on to new team members:
- Which layout primitives and components to use
- Where component files should be located
- How components should be named and structured
- What should never be hardcoded
- How to handle design tokens and styling
- Project-specific architectural patterns
Once defined, these rules dramatically reduce repetitive prompting and ensure consistent output across all Figma implementation tasks.
Prerequisites
- Figma MCP server must be connected and accessible
- Access to the project codebase for analysis
- Understanding of your team's component conventions (or willingness to establish them)
When to Use This Skill
Use this skill when:
- Starting a new project that will use Figma designs
- Onboarding an AI coding agent to an existing project with established patterns
- Standardizing Figma-to-code workflows across your team
- Updating or refining existing design system conventions
- Users explicitly request: "create design system rules", "set up Figma guidelines", "customize rules for my project"
Required Workflow
Follow these steps in order. Do not skip steps.
Step 1: Run the Create Design System Rules Tool
Call the Figma MCP server's create_design_system_rules tool to get the foundational prompt and template.
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.
- 10d ago First seen · 539 lines · 71 tokens per session scan A 401da565f988
figma-create-design-system-rules is a skill published in the GitHub repository app-builders-club/design-builder (4 stars, last pushed 2mo ago), licensed MIT. It adds 71 tokens to every session and 3,972 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. It is 86% identical to figma-create-design-system-rules, differing in 32 lines, and is treated as a copy.
Other skills, from other repositories
top-design
Create award-winning, immersive web experiences at the level of Awwwards-featured agencies. Use when the user mentions "Awwwards quality", "make my site stunning", "scroll animations", "parallax storytelling", "cinematic web design", "portfolio site", or "brand experience". Also trigger when elevating a standard…
design-everyday-things
Apply foundational design principles: affordances, signifiers, constraints, feedback, and conceptual models. Use when the user mentions "why is this confusing", "affordance", "error prevention", "discoverability", "human-centered design", "mental model", "mapping", "seven stages of action", "users keep making…
sxo
Search Experience Optimization (SXO) — the bridge between SEO and UX/CRO. Audits the full journey from the SERP click to the on-page goal: SERP click-through factors (title/meta/rich results that win the click), then post-click experience signals that keep users and drive conversions — above-the-fold relevance and…
influence-psychology
Apply the seven principles of ethical persuasion (reciprocity, commitment, social proof, authority, liking, scarcity, unity) to product design, copy, and sales. Use when the user mentions "social proof", "persuasive copy", "why users dont convert", "ethical persuasion", "reciprocity", "scarcity tactics", "commitment…
refactoring-ui
Audit and fix visual hierarchy, spacing, color, and depth in web UIs. Use when the user mentions "my UI looks off" (or amateur/unprofessional), "fix the design", "Tailwind styling", "color palette", "visual hierarchy", "design system", "spacing scale", or "component styling". Also trigger when building consistent…
ux-heuristics
Evaluate and improve interface usability using heuristic analysis. Use when the user mentions "usability audit", "users are confused", "form usability", "navigation problems", "Nielsen heuristics", "cognitive walkthrough", or "is this easy to use". Also trigger when reviewing a design for usability issues, improving…