What problem does it solve? Test analysis skills need framework-specific knowledge (assertion APIs, skip annotations, sleep patterns, tag syntax) that varies across languages, and this Skill centralizes that lookup data so analysis stays language-neutral. ## Core Features & Use Cases - Per-language extension files: Eleven reference files covering .NET, Python, TypeScript, Java, Go, Ruby, Rust, Swift, Kotlin, PowerShell, and C++ test frameworks. - Uniform capability categories: Each file documents test discovery, assertion detection, sleep patterns, skip/ignore, setup/teardown, mystery guest indicators, integration markers, and tag support. - Tag-support gating: Declares auto-edit, report-only, or convention-based capability so the test-tagging skill knows whether it can safely write tags. - Use Case: The test-quality-auditor agent analyzing a pytest codebase reads extensions/python.md to get pytest fixture, marker, and assertion patterns before running test-gap-analysis. ## Quick Start Ask the test-quality-auditor agent to analyze your test suite and it will load the extension file matching your language and framework.