Fetch up-to-date library documentation directly into context to prevent hallucinated APIs and outdated code examples. Use when user says "use docs", "fetch docs for [library]", "check [library] docs", or asks about a library's API, methods, or usage patterns and current documentation would be helpful. Also use proactively when generating code for libraries where version-specific accuracy matters.
Installs into .claude/skills of the current project.
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---
name: docs-fetcher
description: Fetch up-to-date library documentation directly into context to prevent hallucinated APIs and outdated code examples. Use when user says "use docs", "fetch docs for [library]", "check [library] docs", or asks about a library's API, methods, or usage patterns and current documentation would be helpful. Also use proactively when generating code for libraries where version-specific accuracy matters.
---
# Docs Fetcher
Fetch current documentation for libraries to ensure accurate, up-to-date code generation.
## Workflow
### Trigger Detection
Activate this skill when:
- User explicitly requests: "use docs", "fetch docs for X", "check X documentation"
- User asks about specific API methods, parameters, or patterns for a supported library
- Generating code where version-specific accuracy is critical
### Execution Steps
1. **Identify the library** from user request or code context
2. **Look up documentation URLs** in [references/libraries.md](references/libraries.md)
3. **Fetch relevant pages** using `fetch_webpage` tool with appropriate URLs
4. **Use fetched content** to inform code generation or answer
### Fetching Strategy
For comprehensive coverage, fetch multiple pages:
```
fetch_webpage(urls: [
"https://fastapi.tiangolo.com/tutorial/dependencies/",
"https://fastapi.tiangolo.com/advanced/advanced-dependencies/"
])
```
For quick lookups, fetch the most relevant single page.
## Adding Libraries
To add a new library, edit [references/libraries.md](references/libraries.md):
1. Find the official documentation URL
2. Identify key pages: quickstart, API reference, common patterns
3. Add entry following the existing format
## Limitations
- Fetches only explicitly listed URLs (no recursive crawling)
- Some documentation sites may block or limit fetches
- Very large pages may be truncated
- No version pinning — fetches current docs
## When NOT to Use
- General programming questions not library-specific
- Libraries not in the mapping (inform user, suggest they provide URLs)
- Simple questions where training knowledge is sufficient
