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 Owl-Listener/designpowers --skill design-librarygit clone --depth 1 https://github.com/Owl-Listener/designpowersWrote 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/owl-listener/designpowers/design-library)<a href="https://agentmods.dev/skills/owl-listener/designpowers/design-library"><img src="https://agentmods.dev/badge/skills/owl-listener/designpowers/design-library.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 5.1 | $0.00114 | $0.02028 |
| Opus 5 | $0.00057 | $0.01014 |
| Sonnet 5 | $0.00023 | $0.00406 |
| Haiku 4.5 | $0.00011 | $0.00203 |
Grade A, and why
design-library scanned grade A 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 8d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
Fetch the raw file at the URL above (e.g. `curl` or any fetch tool). Confirm it returns a valid `DESIGN.md` (front matter parses, required sections present — see `design-md`). How it starts
The opening of the file, as written. The whole thing — 86 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Design Library (awesome-design-md)
There's an open, MIT-licensed library of ready-made DESIGN.md files — VoltAgent/awesome-design-md — covering 70+ well-known brands (Stripe, Linear, Notion, Vercel, Apple, Shopify, Wise, and more), each authored in the standard DESIGN.md format. This skill lets a designer say "let's use the same design language as Stripe" and have the team pull that brand's DESIGN.md straight off the shelf as a high-fidelity starting point, instead of describing a vibe from scratch.
It pairs with design-md (which defines the format and how the build consumes it) and inspiration-scouting (the "what to take / what to leave" discipline).
When to Use
- "Use the same design language as [brand]" / "make it feel like [brand]" / "start from [brand]'s DESIGN.md"
- "What brands / design systems can I borrow from?" → browse the library
- The user names a recognisable product as a visual reference for the whole project (not just one screen)
For a one-off aesthetic reference on a single component, inspiration-scouting is lighter. Use this skill when a whole brand's design language should seed the project.
The Library
- Repo:
VoltAgent/awesome-design-md(MIT) - Path convention:
design-md/<slug>/DESIGN.md(each brand folder also has aREADME.md) - Raw URL (to fetch the file):
https://raw.githubusercontent.com/VoltAgent/awesome-design-md/main/design-md/<slug>/DESIGN.md - Preview (for the human to view in a browser):
https://getdesign.md/<slug>/design-md— the upstream hosted page. Note: it blocks scripted access, so it's a link to hand the user, not something the agent fetches. - Format: standard
DESIGN.md— YAML front-matter tokens + the required markdown sections (seedesign-md). Many include extra sections like Responsive Behavior and Iteration Guide.
The files are organised by category (AI/LLM platforms, Developer tools, Backend/DevOps, Productivity/SaaS, Design tools, Fintech/Crypto, E-commerce, Media/Consumer, Automotive, Retro Web).
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.
- 8d ago First seen · 86 lines · 114 tokens per session scan A 9270f24b1c48
design-library is a skill published in the GitHub repository Owl-Listener/designpowers (241 stars, last pushed 2mo ago), licensed MIT. It adds 114 tokens to every session and 2,028 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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