Systematic Debugging

The Iron Law

NO FIXES WITHOUT ROOT CAUSE INVESTIGATION FIRST

If Phase 1 below isn't complete, you cannot propose fixes.

Adaptive depth based on ${CLAUDE_EFFORT} (v2.1.120+):

Effort	Protocol
`low`	3-step fast path: (1) capture the exact error, (2) reproduce minimally, (3) form one hypothesis and test it. Skip the full protocol for trivial single-file bugs.
`medium` and above	Full protocol below. Root-cause discipline is non-negotiable at default effort and higher.

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First Seen

Aug 2, 2026

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