Systematic Debugging

This is the disciplined alternative to guessing at fixes. It forces you to drill upward through diagnostic layers (symptom, logic, system, architecture, contracts, platform, spec gaps) until you hit root cause, then runs triage checks before you touch code. The patch-shape triage alone is worth it: it catches those tempting "just add a guard" fixes that turn into technical debt because you patched the consumer instead of fixing the canonical owner. Use it when you're under pressure and want to skip investigation, when you've already tried two fixes that didn't work, or anytime fallback chains and duplicate owners are in play. The quality gates feel heavy at first but they prevent the expensive kind of bug whack-a-mole.

Install to Claude Code

npx -y skills add ganyuanran/aegis --skill systematic-debugging --agent claude-code