Agent tool:
  subagent_type: "general-purpose"
  prompt: |
    Research: {library}. Find latest version, official documentation,
    key features, constraints, best practices, known issues, and usage patterns.
    Use WebSearch and WebFetch to gather information.
    Save results to .claude/docs/libraries/{library}.md
    Return concise summary.

Fallback: WebSearch/WebFetch

If Gemini unavailable, verify via manual web search:

Official documentation
GitHub README
PyPI / npm page
Latest release notes

Content to Document

Basic Information
- Official name, version, license
- Official URL
- Installation command
Core Features
- Main features
- Basic usage (code examples)
Constraints & Notes
- Known limitations
- Conflicts with other libraries
- Performance characteristics
- Async/sync considerations
Usage Patterns in This Project
- Recommended usage
- Patterns to avoid
Troubleshooting
- Common errors and solutions

Output Location

.claude/docs/libraries/$ARGUMENTS.md

Documentation Template

# {Library Name}

## Overview

- **Version**: {version}
- **License**: {license}
- **Official URL**: {url}
- **Installation**: `{install command}`

## Core Features

{Description of main features}

## Basic Usage

```python
{Code example}

Constraints & Notes

{Limitation 1}
{Limitation 2}

Recommended Patterns

Do

{Good pattern}

Don't

{Anti-pattern}

Troubleshooting

{Error message}

Cause: {cause} Solution: {solution}

Fallback: WebSearch/WebFetch

Content to Document

Output Location

Documentation Template

Constraints & Notes

Recommended Patterns

Do

Don't

Troubleshooting

{Error message}

References

research-lib

Research Library

Research Items

Primary Tool: General-Purpose Subagent (Opus)