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 memi-design/design-skills --skill figma-library-buildergit clone --depth 1 https://github.com/memi-design/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/memi-design/design-skills/figma-library-builder)<a href="https://agentmods.dev/skills/memi-design/design-skills/figma-library-builder"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/figma-library-builder/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/memi-design/design-skills/figma-library-builder"><img src="https://agentmods.dev/badge/skills/memi-design/design-skills/figma-library-builder.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 | $0.00049 | $0.00287 |
| Opus 5 | $0.00024 | $0.00143 |
| Sonnet 5 | $0.00010 | $0.00057 |
| Haiku 4.5 | $0.00005 | $0.00029 |
Grade A, and why
figma-library-builder 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 12d 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.
What it actually says
Figma Library Builder Router
Deprecated compatibility slug. Use
figma-generate-libraryfor the canonical library-generation workflow.
Use design-systems and token-architecture to make platform-neutral architecture decisions. Use the official Figma workflow for current product and API execution details.
Procedure
- Inventory the codebase token sources, components, naming, variants, accessibility requirements, and release constraints.
- Inspect the target Figma file and existing libraries before proposing new assets.
- Produce a mapping plan from code concepts to Figma concepts and obtain approval for destructive or large-scale changes.
- Load Figma's current library-generation skill from the official MCP guide distribution.
- Execute in bounded phases, validating created assets and visual output after each phase.
- Preserve Code Connect and local component identities where they already exist.
- If the official workflow is unavailable, return the architecture and migration plan without performing Figma mutations.
Official source: Figma MCP Server Guide
Return the architecture, mappings, assets created, validation evidence, and remaining migration work.
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.
- 12d ago First seen · 25 lines · 49 tokens per session scan A db1260637cac
figma-library-builder is a skill published in the GitHub repository memi-design/design-skills (7 stars, last pushed 1mo ago), licensed MIT. It adds 49 tokens to every session and 287 once invoked, about $0.0002 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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