xmp4

What problem does it solve?

This Skill removes the friction of manually grepping through open-source library source code to understand how APIs work, find real usage examples, or locate relevant tests, which wastes AI tokens and returns noisy, unreliable text matches.

Core Features & Use Cases

• Semantic symbol lookup: Instantly retrieve accurate method signatures, source bodies, and type hierarchies for any symbol in 856+ indexed OSS libraries across 10+ programming languages.
• Real usage and test tracing: Get actual callers, callees, and tests that exercise a specific symbol, so you see idiomatic usage patterns instead of guessing from incomplete documentation.
• Use case example: If you need to understand how Flask.wsgi_app is used in real projects, this Skill returns its exact signature, source body, and all verified call sites in a fraction of the tokens required for manual source grepping.

Quick Start

Use the xmp4 skill to find all real tests that exercise the requests.Session.send method in the requests library and show the first relevant test file excerpt.