Context7: External Library Documentation

Use Context7 to look up current library APIs instead of guessing from training data.

When to Use

1. Implementing with external libraries - Check current API before writing code
2. Debugging library errors - Verify correct usage patterns
3. User asks "how do I use X" - Get up-to-date examples
4. Uncertain about library API - Don't guess, look it up
5. Library version matters - Context7 has version-specific docs

Workflow

resolve-library-id(libraryName="tokio", query="async runtime spawn tasks")
query-docs(libraryId="/tokio-rs/tokio", query="how to spawn async tasks")

Always call resolve-library-id first to get the correct library ID, then query-docs with a specific question.

When NOT to Use

• Standard library features (Rust std, Python builtins, etc.)
• Confident in the API from recent experience
• Simple operations with well-known patterns

Example

User asks about async file reading with tokio:

1. resolve-library-id(libraryName="tokio", query="async file reading")
2. query-docs(libraryId="/tokio-rs/tokio", query="async file reading tokio::fs")
3. Use the returned docs to write correct code