This skill transforms bug fixing from guesswork into a disciplined engineering process. It provides a structured framework to handle complex regressions and hard-to-reproduce bugs by enforcing a strict sequence of phases: reproduction, hypothesis generation, instrumentation, and verification.
Use this skill when the user reports a bug, describes a failure/crash, or notes a performance regression that isn't immediately obvious. It is specifically designed for 'hard' bugs that require more than a simple one-line fix.
Designed for high-capability coding agents (e.g., Claude Code, Codex, Gemini CLI) that can execute shell commands and write tests.
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