Comprehensive Go test quality and coverage analysis. Use this skill whenever the user wants to: - Review Go test files for gaps, weaknesses, or inaccurate assertions - Improve test coverage with a focus on quality (not just percentage) - Audit test suite structure, patterns, and Go idioms - Find missing edge cases, error paths, or concurrency test gaps - Check if tests actually verify behavior or just run code without assertions Trigger on phrases like "review my Go tests", "test coverage", "test quality", "what am I missing in my tests", "audit tests", "improve tests", "test gaps", or any request involving *_test.go files. Also trigger when the user shares Go test code and asks for feedback, even if they don't explicitly say "review".