Debug

Find the root cause. Don't guess, don't patch symptoms.

Reproduce → Hypothesize → Investigate → Isolate → Fix → Verify → Prevent

Phase 1: Reproduce

1. Get the exact error. Full stack trace, exit code, failing assertion. Not a summary.
2. Reproduce it. If it passes now, it's intermittent — note that.
3. Minimize the reproduction. Smaller repro = faster investigation.

Phase 1b: Start Log Server (frontend/UI bugs only)

Trigger: the bug is in a browser, needs runtime evidence, or you'd normally say "add console.log and check DevTools."

If the bug is backend/logic/CI, skip to Phase 2.