fetch-library-docs

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Fetches official documentation for external libraries and frameworks (React, Next.js, Prisma, FastAPI, Express, Tailwind, MongoDB, etc.) with 60-90% token savings via content-type filtering. Use this skill when implementing features using library APIs, debugging library-specific errors, troubleshooting configuration issues, installing or setting up frameworks, integrating third-party packages, upgrading between library versions, or looking up correct API patterns and best practices. Triggers automatically during coding work - fetch docs before writing library code to get correct patterns, not after guessing wrong.

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Sourcepanaversity/claude-code-skills-lab

Added on2026-02-22

NPX Install

npx skill4agent add panaversity/claude-code-skills-lab fetch-library-docs

SKILL.md Content

Library Documentation Skill

Fetches official library documentation with 60-90% token savings.

WHEN TO INVOKE (Auto-Detection)

INVOKE AUTOMATICALLY when:

Context	Detection Signal	Content Type
Implementing	About to write code using library API	`examples,api-ref`
Debugging	Error contains library name (e.g., `PrismaClientError` )	`troubleshooting`
Installing	Adding new package, `npm install` , setup task	`setup`
Integrating	Connecting libraries ("use X with Y")	`examples,setup`
Upgrading	Version migration, breaking changes	`migration`
Uncertain	First use of library feature, unsure of pattern	`examples`

DO NOT INVOKE when:

Already have sufficient knowledge from training
User pasted docs or has them open
Task is about local/private code (use codebase search)
Comparing libraries (use web search)

DECISION LOGIC

1. Identify Library

Priority: User mention → Error message → File imports → package.json → Ask user

Examples:

```
PrismaClientKnownRequestError
```
→ library = "prisma"
```
import { useState } from 'react'
```
→ library = "react"
```
from fastapi import FastAPI
```
→ library = "fastapi"

2. Identify Topic

Priority: User specifies → Error message → Feature being implemented → "getting started"

3. Select Content Type

Task	Content Type
Implementing code	`examples,api-ref`
Debugging error	`troubleshooting,examples`
Installing/setup	`setup`
Integrating libs	`examples,setup`
Upgrading version	`migration`
Understanding why	`concepts`
Best practices	`patterns`

EXECUTION

IMPORTANT: Always use the Python entry point (
fetch-docs.py
) for cross-platform compatibility.

Use

python3

on Linux/macOS/WSL,

python

on Windows:

bash

# With known library ID (faster - saves 1 API call)
python3 scripts/fetch-docs.py --library-id <id> --topic "<topic>" --content-type <types>

# With library name (auto-resolves)
python3 scripts/fetch-docs.py --library <name> --topic "<topic>" --content-type <types>

Windows note: Use
python
instead of
python3
(e.g.,
python scripts/fetch-docs.py ...
)

Quick Library IDs

Library	ID
React	`/reactjs/react.dev`
Next.js	`/vercel/next.js`
Prisma	`/prisma/docs`
Tailwind	`/tailwindlabs/tailwindcss.com`
FastAPI	`/tiangolo/fastapi`

See references/library-ids.md for complete list.

ERROR HANDLING (Quick Reference)

Error	Action
`[LIBRARY_NOT_FOUND]`	Try spelling variations
`[LIBRARY_MISMATCH]`	Use --library-id directly
`[EMPTY_RESULTS]`	Broaden topic or use `--content-type all`
`[RATE_LIMIT_ERROR]`	Check API key setup

Call Budget: Context7 allows 3 calls/question. Use

--library-id

to save 1 call.

See references/context7-tools.md for full error handling.

REFERENCES

Library IDs - Complete library ID list
Usage Patterns - Real-world examples
Context7 Tools - API details, error codes, setup