Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/greedychipmunk/agent-skillsnpx agentmods add skills/greedychipmunk/agent-skills/astryxWrote 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/greedychipmunk/agent-skills/astryx)<a href="https://agentmods.dev/skills/greedychipmunk/agent-skills/astryx"><img src="https://agentmods.dev/badge/skills/greedychipmunk/agent-skills/astryx/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/greedychipmunk/agent-skills/astryx"><img src="https://agentmods.dev/badge/skills/greedychipmunk/agent-skills/astryx.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium MCP Rug Pull · line 85 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 319 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
- medium MCP Rug Pull · line 369 npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.Fix: Pin the version: npx @scope/[email protected]
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 | $0.00098 | $0.03774 |
| Opus 5.5 | $0.00039 | $0.01510 |
| Sonnet 5.5 | $0.00020 | $0.00755 |
| Haiku 4.5 | $0.00010 | $0.00377 |
Grade A, and why
astryx 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 407 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Astryx
A React 19 design system by Meta. Accessible, themeable components with built-in spacing, dark mode, and StyleX styling. This skill covers installation, theming, styling, layout, CLI usage, AI integration, and migration.
When to Use
- Building React UIs with Astryx components from @astryxdesign/core
- Creating or customizing themes with defineTheme
- Styling components via StyleX (xstyle prop), Tailwind, or className
- Scaffolding pages from CLI templates
- Migrating existing Tailwind/shadcn/Radix apps to Astryx
- Using the Astryx CLI for component docs, tokens, and templates
- Connecting to the Astryx MCP server for AI-powered component discovery
- Validating Astryx code against system conventions
Packages at a Glance
| Package | Purpose |
|---|---|
@astryxdesign/core |
Component library (React 19, StyleX, dark mode) |
@stylexjs/stylex |
Atomic CSS-in-JS (peer dependency) |
@astryxdesign/cli |
CLI: component docs, templates, themes, codemods |
@astryxdesign/theme-neutral |
Muted minimal theme (good starting point) |
@astryxdesign/theme-butter |
Golden buttery surfaces, blue accents |
@astryxdesign/theme-chocolate |
Warm brown tones, cozy beige |
@astryxdesign/theme-gothic |
Dark-only atmospheric theme |
@astryxdesign/theme-matcha |
Earthy green theme |
@astryxdesign/theme-stone |
Warm stone and slate tones |
@astryxdesign/theme-y2k |
Playful Y2K pop, periwinkle + holographic |
Quick Start
Install core, StyleX, a theme, and the CLI:
npm install @astryxdesign/core @stylexjs/stylex @astryxdesign/theme-neutral @astryxdesign/cli
Add theme CSS to your global stylesheet:
@import '@astryxdesign/core/reset.css';
@import '@astryxdesign/core/astryx.css';
@import '@astryxdesign/theme-neutral/theme.css';
Wrap your app in Theme and add a component:
import {Theme} from '@astryxdesign/core';
import {neutralTheme} from '@astryxdesign/theme-neutral';
import {Button} from '@astryxdesign/core/Button';
import {VStack} from '@astryxdesign/core/Layout';
function App() {
return (
<Theme theme={neutralTheme}>
<VStack gap={2}>
<Button label="Hello Astryx" onClick={() => alert('Hi!')} />
</VStack>
</Theme>
);
}
What ships with it
10 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.
- references/cli.md 5.2 KB
- references/layout.md 5.5 KB
- references/migration.md 9.8 KB
- references/principles.md 2.4 KB
- references/styling-libraries.md 5.2 KB
- references/styling.md 4.9 KB
- references/theme.md 6.3 KB
- references/tokens.md 5.8 KB
- references/working-with-ai.md 5.5 KB
- scripts/validate.py 7.2 KB runs code
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.
- 2mo ago First seen · 407 lines · 98 tokens per session scan A 43ef90ec1481
astryx is a skill published in the GitHub repository greedychipmunk/agent-skills (24 stars, last pushed 17d ago), licensed MIT. It adds 98 tokens to every session and 3,774 once invoked, about $0.0004 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.
astryx compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| astryxgreedychipmunk/agent-skills | Skill | 24 | 17d ago | MIT | A | 98 | Claude Code, Codex |
| chakra-ui-builderchakra-ui/chakra-ui | Skill | 41k | yesterday | MIT | A | 214 | Claude Code, Codex |
| tamagui-v6-configtamagui/tamagui | Skill | 14k | yesterday | MIT | A | 0 | Claude Code, Codex |
| tamagui-theme-generatortamagui/tamagui | Skill | 14k | yesterday | MIT | A | 48 | Claude Code, Codex |
| frontend-ui-dark-tsmicrosoft/skills | Skill | 3.2k | yesterday | MIT | A | 48 | Claude Code |
| cobejsMengTo/Skills | Skill | 7.3k | yesterday | MIT | A | 31 | Claude Code, Codex |
| vercel-composition-patternscalesthio/OpenMontage | Skill | 77k | 3d ago | AGPL-3.0 | A | 58 | Claude Code, Codex |