Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add superbenefit/sb-marketplace/plugin install astro-devWrote 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/superbenefit/sb-marketplace/astro-knowledge)<a href="https://agentmods.dev/skills/superbenefit/sb-marketplace/astro-knowledge"><img src="https://agentmods.dev/badge/skills/superbenefit/sb-marketplace/astro-knowledge/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/superbenefit/sb-marketplace/astro-knowledge"><img src="https://agentmods.dev/badge/skills/superbenefit/sb-marketplace/astro-knowledge.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 | $0.00029 | $0.00951 |
| Opus 5 | $0.00015 | $0.00476 |
| Sonnet 5 | $0.00006 | $0.00190 |
| Haiku 4.5 | $0.00003 | $0.00095 |
Grade A, and why
astro-knowledge 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 9d 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 — 177 lines — stays where its author put it; the contents beside it link to each section on GitHub.
astro-knowledge Skill
Expert documentation and API reference provider for Astro and Starlight development.
Purpose
The astro-knowledge skill provides on-demand documentation lookup and API verification. It helps agents confirm current syntax, check feature availability, and access comprehensive API references.
Capabilities
- API Verification: Confirm current syntax for Astro/Starlight APIs
- Feature Lookup: Check availability and usage patterns
- Documentation Search: Find relevant docs quickly
- Best Practices: Provide current recommendations
- Version Checking: Note version-specific features
Loading Strategy
This skill loads on-demand when agents need:
- API syntax confirmation
- Feature availability verification
- Documentation references
- Configuration examples
- Migration guidance
Usage
This skill is loaded when:
- Using the
/lookupcommand for quick API reference - During implementation via
/devfor API verification - When planning with
/designfor feature availability checks - Whenever current syntax or API documentation is needed
Documentation Resources
Cached References
Location: \${CLAUDE_PLUGIN_ROOT}/skills/astro-knowledge/references/
- Full Astro API reference
- Starlight configuration guide
- Content Collections API
- Routing patterns
Knowledge Base
Location: \${CLAUDE_PLUGIN_ROOT}/knowledge-base/
- Syntax details
- Common patterns
- Best practices
MCP Server Integration
If astro-docs MCP server is available:
- Real-time documentation lookups
- Latest API information
- Version-specific documentation
Common Lookups
Collections API
```typescript // getCollection, getEntry, getEntries import { getCollection, getEntry } from 'astro:content';
// Get all entries const posts = await getCollection('blog');
// Get single entry const post = await getEntry('blog', 'post-slug');
// Filter entries const published = await getCollection('blog', ({ data }) => data.draft !== true ); ```
What ships with it
3 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.
- 9d ago First seen · 177 lines · 29 tokens per session scan A 877785e1286e
astro-knowledge is a skill published in the GitHub repository superbenefit/sb-marketplace (5 stars, last pushed 7mo ago), licensed CC0-1.0. It adds 29 tokens to every session and 951 once invoked, about $0.0001 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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