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 lahkiri/xeo-forge --skill one-design-languagegit clone --depth 1 https://github.com/lahkiri/xeo-forgeWrote 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/lahkiri/xeo-forge/one-design-language)<a href="https://agentmods.dev/skills/lahkiri/xeo-forge/one-design-language"><img src="https://agentmods.dev/badge/skills/lahkiri/xeo-forge/one-design-language/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/lahkiri/xeo-forge/one-design-language"><img src="https://agentmods.dev/badge/skills/lahkiri/xeo-forge/one-design-language.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 | $0.00056 | $0.00246 |
| Opus 5.5 | $0.00022 | $0.00098 |
| Sonnet 5.5 | $0.00011 | $0.00049 |
| Haiku 4.5 | $0.00006 | $0.00025 |
Grade A, and why
one-design-language 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.
What it actually says
Every Xeo Forge interface change reuses the established token vocabulary: spacing steps, radii, the ink/content/line/signal color roles, and the type scale defined in app/globals.css. When a component appears to need a new color, radius, or spacing value, the agent treats that as a design-system gap to resolve first — either an existing token already covers the need (usually) or the new token is added once, centrally, with a name that describes its role rather than its appearance.
Screen-local CSS classes that duplicate token effects (a bespoke shadow here, a one-off radius there) are treated as defects, not shortcuts. The same discipline applies to icons: components/icons.tsx is the only source of glyphs, and unicode symbols standing in for icons are removed on sight. The test the agent applies: if two screens implement the same visual idea differently, one of them is wrong.
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 · 9 lines · 56 tokens per session scan A 8826c6f03dfe
one-design-language is a skill published in the GitHub repository lahkiri/xeo-forge (11 stars, last pushed 1mo ago), licensed MIT. It adds 56 tokens to every session and 246 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 2026-08-30.
Other skills, from other repositories
commonly-design
Use this skill for ANY visual / UI / design work on Commonly — picking colors, choosing fonts, styling new v2 components, building HTML mocks, designing marketing pages, or auditing whether a change matches the brand. Triggers on tasks involving v2.css tokens, accent / blue / focus ring / SF font, brand mark / logo…
frontend-design
Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications (examples include websites, landing pages, dashboards, React components, HTML/CSS layouts, or when styling/beautifying any web UI).…
claude-design
Design one-off HTML artifacts (landing, deck, prototype).
sketch
Throwaway HTML mockups: 2-3 design variants to compare.
popular-web-designs
54 real design systems (Stripe, Linear, Vercel) as HTML/CSS.
scrollcraft
Premium scroll-driven landing pages; scroll = timeline.