Librarian Skill

Use this skill when you need deep understanding of external codebases.

Best-use cases:

• Explain how a third-party library works internally.
• Find real implementation patterns in public code.
• Compare two libraries/frameworks for a specific capability.
• Trace architecture and execution flow across a repository.

Tool routing:

• Official docs/API questions: use documentation lookup first.
• Real-world code usage patterns: search public repositories.
• Internal implementation details: fetch source and read targeted files.