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 ianshk/astro-skills --skill astrogit clone --depth 1 https://github.com/ianshk/astro-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/ianshk/astro-skills/astro)<a href="https://agentmods.dev/skills/ianshk/astro-skills/astro"><img src="https://agentmods.dev/badge/skills/ianshk/astro-skills/astro/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/ianshk/astro-skills/astro"><img src="https://agentmods.dev/badge/skills/ianshk/astro-skills/astro.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 | $0.00072 | $0.01220 |
| Opus 5 | $0.00036 | $0.00610 |
| Sonnet 5 | $0.00014 | $0.00244 |
| Haiku 4.5 | $0.00007 | $0.00122 |
Grade A, and why
astro 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 10d 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 — 129 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Astro Skill
Reference for building static Astro sites (output: 'static'). Covers architecture decisions, content collections, SEO, image optimization, pagination, and deployment patterns.
Consult docs.astro.build and llms.txt for latest APIs when needed.
References
Read these files for detailed patterns and templates:
| Reference | What it covers |
|---|---|
content-collections.md |
Schemas (z.image, z.enum, reference()), querying, dynamic routes, entry.body |
image-optimizations.md |
<Image /> component, downscaling tip, SVG components, aspect ratios |
seo-checklist.md |
Head component, per-page checklist, structured data (JSON-LD), hreflang, content rules |
pagination.md |
paginate(), nested pagination, page prop |
Architecture Rules
1. Astro-first
.astrofiles for everything presentational — zero JS shipped to client.- Framework components (
.tsx,.svelte,.vue, etc.) only when interactivity is needed.
2. Minimal hydration
Use the lightest client:* directive that works:
| Directive | Use case |
|---|---|
client:load |
Critical above-the-fold interactivity |
client:idle |
Non-critical (modals, popovers) |
client:visible |
Below-the-fold widgets |
client:media |
Screen-size-specific UI (e.g. mobile sidebar toggle) |
client:only="<framework>" |
Browser-only APIs (e.g. localStorage, WebGL) |
3. Keep islands small
- Wrap only the interactive subtree in a framework component. Surrounding static markup stays in
.astro. - Pass data via props from the
.astroparent — never refetch inside islands.
4. Fonts via Fontsource
Always install fonts locally via Fontsource npm packages — never Google Fonts CDN links.
Example if using Inter
npm install @fontsource-variable/inter
What ships with it
4 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.
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.
- 10d ago First seen · 129 lines · 72 tokens per session scan A 42d2dfcf7974
astro is a skill published in the GitHub repository ianshk/astro-skills (4 stars, last pushed 2mo ago), licensed MIT. It adds 72 tokens to every session and 1,220 once invoked, about $0.0004 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.
Other skills, from other repositories
accessibility
Audit and improve web accessibility following WCAG 2.2 guidelines. Use when asked to "improve accessibility", "a11y audit", "WCAG compliance", "screen reader support", "keyboard navigation", or "make accessible".
performance
Optimize web performance for faster loading and better user experience. Use when asked to "speed up my site", "optimize performance", "reduce load time", "fix slow loading", "improve page speed", or "performance audit".
core-web-vitals
Optimize Core Web Vitals (LCP, INP, CLS) for better page experience using field and lab evidence. Use when asked to "improve Core Web Vitals", "fix LCP", "reduce CLS", "optimize INP", "page experience optimization", or "fix layout shifts".
frontend-design
Create distinctive, production-grade frontend interfaces with high design quality. Use when the user asks to build landing pages, websites, dashboards, web components, or any frontend UI. Generates creative, polished code that avoids generic AI aesthetics.
prototype
Build a self-contained local prototype at .turbo/prototypes/ .html, drive it, and hand it to the user to settle unknowns that prose cannot answer. Use when the user asks to "prototype this", "build a prototype", "mock this up", "show me what it would look like", "let me try the interaction first", or when a decision…
slop-eval
Objectively evaluate a UI/web design against the pols.dev anti-slop design law: detect catalogued slop tells with cited evidence, score 8 weighted axes (color, type, components, layout, motion, execution, signature, cohesion), and emit a Slop Report with a 0–100 Slop Index and grade. Use when the user asks to…