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/mocaos/cortex-app/design-systemnpx skills add mocaOS/cortex-app --skill design-systemgit clone --depth 1 https://github.com/mocaOS/cortex-appWrote 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/mocaos/cortex-app/design-system)<a href="https://agentmods.dev/skills/mocaos/cortex-app/design-system"><img src="https://agentmods.dev/badge/skills/mocaos/cortex-app/design-system.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 | $0.00050 | $0.00433 |
| Opus 5 | $0.00025 | $0.00217 |
| Sonnet 5 | $0.00010 | $0.00087 |
| Haiku 4.5 | $0.00005 | $0.00043 |
Grade A, and why
cortex-design 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.
What it actually says
Read the README.md file within this skill, and explore the other available files.
If creating visual artifacts (slides, mocks, throwaway prototypes, etc), copy assets out and create static HTML files for the user to view. If working on production code, you can copy assets and read the rules here to become an expert in designing with this brand.
If the user invokes this skill without any other guidance, ask them what they want to build or design, ask some questions, and act as an expert designer who outputs HTML artifacts or production code, depending on the need.
Quick reference
- Accent color (only chromatic):
oklch(0.79 0.18 70.67)— use sparingly. - Fonts: Inter (UI), JetBrains Mono (code). Both variable, in
fonts/. - Radius default:
0.5rem. Glass blur:24px. - Icons: Lucide React, outline, 2 px stroke. No emoji.
- Motion: opacity 0→1, y 20→0, 300–400 ms, 50 ms stagger.
- Dark mode is primary. Add
class="dark"to<html>. - Every answer shows sources. Every job shows status. Trust through transparency.
File map
README.md— full content & visual foundationscolors_and_type.css— canonical tokens +@font-face(import this)tokens.css— token-only subsetfonts/— TTFsassets/logo.svg— wordmarkpreview/*.html— live component specimensui_kits/library/— pixel-faithful web-app recreation (see its README)
What ships with it
60 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.
- assets/logo.svg 19 KB
- colors_and_type.css 9.3 KB
- design-system.html 22 KB
- design-system/assets/logo.svg 19 KB
- design-system/colors_and_type.css 9.3 KB
- design-system/fonts/InterVariable-Italic.ttf 889 KB
- design-system/fonts/InterVariable.ttf 859 KB
- design-system/fonts/JetBrainsMono-Italic.ttf 302 KB
- design-system/fonts/JetBrainsMono.ttf 296 KB
- design-system/marketing_tokens.css 9.1 KB
- design-system/preview/badges.html 1.5 KB
- design-system/preview/buttons.html 3.2 KB
- design-system/preview/chat-message.html 1.4 KB
- design-system/preview/color-accent.html 1.4 KB
- design-system/preview/color-charts.html 1.6 KB
- design-system/preview/color-semantic.html 2.1 KB
- design-system/preview/color-surfaces.html 1.4 KB
- design-system/preview/color-text.html 1.4 KB
- design-system/preview/document-card.html 2.5 KB
- design-system/preview/drop-zone.html 1.0 KB
- design-system/preview/glass.html 1.5 KB
- design-system/preview/icons.html 2.5 KB
- design-system/preview/input.html 1.6 KB
- design-system/preview/logo.html 666 B
- design-system/preview/mk-buttons.html 1.8 KB
- design-system/preview/mk-cards.html 2.0 KB
- design-system/preview/mk-eyebrow.html 1.3 KB
- design-system/preview/mk-feature-grid.html 3.0 KB
- design-system/preview/mk-hero.html 2.0 KB
- design-system/preview/mk-navbar.html 2.2 KB
- design-system/preview/mk-steps.html 2.1 KB
- design-system/preview/mk-tokens.html 7.4 KB
- design-system/preview/mk-type-display.html 1.3 KB
- design-system/preview/motion.html 1.5 KB
- design-system/preview/nav-pill.html 1.4 KB
- design-system/preview/radii.html 1.3 KB
- design-system/preview/shadows.html 1.0 KB
- design-system/preview/spacing-scale.html 1.5 KB
- design-system/preview/stats-card.html 1.7 KB
- design-system/preview/type-display.html 765 B
- design-system/preview/type-mono.html 915 B
- design-system/preview/type-scale.html 1.6 KB
- design-system/README.md 12 KB
- design-system/SKILL.md 1.7 KB
- design-system/tokens.css 6.1 KB
- fonts/InterVariable-Italic.ttf 889 KB
- fonts/InterVariable.ttf 859 KB
- fonts/JetBrainsMono-Italic.ttf 302 KB
- fonts/JetBrainsMono.ttf 296 KB
- preview/badges.html 1.5 KB
- preview/buttons.html 3.2 KB
- preview/chat-message.html 1.4 KB
- preview/color-accent.html 1.4 KB
- preview/color-charts.html 1.6 KB
- preview/color-semantic.html 2.1 KB
- preview/color-surfaces.html 1.4 KB
- preview/color-text.html 1.4 KB
- preview/document-card.html 2.5 KB
- preview/drop-zone.html 1.0 KB
- preview/glass.html 1.5 KB
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 · 30 lines · 50 tokens per session scan A 7b0aed5a2b6a
cortex-design is a skill published in the GitHub repository mocaOS/cortex-app (5 stars, last pushed 16d ago), licensed Apache-2.0. It adds 50 tokens to every session and 433 once invoked, about $0.0003 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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