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
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User pasted docs or has them open
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Task is about local/private code (use codebase search)
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Comparing libraries (use web search)
DECISION LOGIC
- Identify Library
Priority: User mention → Error message → File imports → package.json → Ask user
Examples:
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PrismaClientKnownRequestError → library = "prisma"
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import { useState } from 'react' → library = "react"
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from fastapi import FastAPI → library = "fastapi"
- Identify Topic
Priority: User specifies → Error message → Feature being implemented → "getting started"
- 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
With known library ID (faster - saves 1 API call)
bash scripts/fetch-docs.sh --library-id <id> --topic "<topic>" --content-type <types>
With library name (auto-resolves)
bash scripts/fetch-docs.sh --library <name> --topic "<topic>" --content-type <types>
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
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Library IDs - Complete library ID list
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Usage Patterns - Real-world examples
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Context7 Tools - API details, error codes, setup