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.

Execution pattern:

1. Identify target library/repo and scope the question.
2. Collect high-signal files (README, package metadata, entry points).
3. Inspect implementation files for the asked behavior.
4. Synthesize findings with concrete file evidence.

Output style:

• Give direct answer first.
• Support with precise file references.
• Use a diagram if system flow is non-trivial.