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debugging

Systematic debugging frameworks for finding and fixing bugs - includes root cause analysis, defense-in-depth validation, and verification protocols

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Apr 3, 2026

.claude/skills/debugging/SKILL.md

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Debugging Skills

A collection of systematic debugging methodologies that ensure thorough investigation before attempting fixes.

Available Sub-Skills

Systematic Debugging

Location: systematic-debugging/SKILL.md

Four-phase debugging framework: Root Cause Investigation → Pattern Analysis → Hypothesis Testing → Implementation. The iron law: NO FIXES WITHOUT ROOT CAUSE INVESTIGATION FIRST.

Root Cause Tracing

Location: root-cause-tracing/SKILL.md

Trace bugs backward through the call stack to find the original trigger. Don't fix symptoms - find where invalid data originated and fix at the source.

Defense-in-Depth Validation

Location: defense-in-depth/SKILL.md

Validate at every layer data passes through to make bugs structurally impossible. Four layers: Entry Point → Business Logic → Environment Guards → Debug Instrumentation.

Verification Before Completion

Location: verification-before-completion/SKILL.md

Run verification commands and confirm output before claiming success. The iron law: NO COMPLETION CLAIMS WITHOUT FRESH VERIFICATION EVIDENCE.

When to Use

  • Bug in production → Start with systematic-debugging
  • Error deep in stack trace → Use root-cause-tracing
  • Fixing a bug → Apply defense-in-depth after finding root cause
  • About to claim "done" → Use verification-before-completion

Quick Dispatch

SymptomSub-Skill
Test failure, unexpected behaviorsystematic-debugging
Error appears in wrong locationroot-cause-tracing
Same bug keeps recurringdefense-in-depth
Need to confirm fix worksverification-before-completion

Core Philosophy

"Systematic debugging is FASTER than guess-and-check thrashing."

From real debugging sessions:

  • Systematic approach: 15-30 minutes to fix
  • Random fixes approach: 2-3 hours of thrashing
  • First-time fix rate: 95% vs 40%

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