Library Documentation Skill

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

WHEN TO INVOKE (Auto-Detection)

INVOKE AUTOMATICALLY when:

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

EXECUTION

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

Use python3 on Linux/macOS/WSL, python on Windows:

# 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

See [references/library-ids.md](references/library-ids.md) for complete list.

ERROR HANDLING (Quick Reference)

Call Budget: Context7 allows 3 calls/question. Use --library-id to save 1 call.

See [references/context7-tools.md](references/context7-tools.md) for full error handling.

REFERENCES

• [Library IDs](references/library-ids.md) - Complete library ID list
• [Usage Patterns](references/patterns.md) - Real-world examples
• [Context7 Tools](references/context7-tools.md) - API details, error codes, setup