root-cause-investigationlisted

# Root Cause Investigation ## Steps 1. List 2-3 ranked hypotheses with confidence and falsification signal. 2. Check the highest-confidence hypothesis first. 3. Stop expanding once evidence identifies the root cause. 4. State the fix logic before editing. 5. Verify the exact failure mode after the fix. ## Rules - Do not patch symptoms without explaining the causal path. - Use condition-based waits for async or concurrent behavior; avoid arbitrary sleeps where the repo has better primitives. - If three hypotheses are falsified, stop and ask PM for new evidence.