diagnose

Systematic bug diagnosis requires a disciplined, six-phase loop: reproduce, minimise, hypothesise, instrument, fix, and regression-test. This workflow isolates root causes by using deterministic feedback signals and targeted instrumentation to verify fixes across codebases and integrations.

Diagnosing a performance regression involves running a phased diagnosis loop to reproduce the slowdown, form hypotheses, and add instrumentation. By testing specific hypotheses against deterministic feedback signals, you can isolate the root cause and apply a verified fix.

Isolating flaky bugs through instrumentation requires forming clear hypotheses about the unexpected behavior and adding targeted tests to capture deterministic feedback signals. This disciplined approach guides the debugging loop from reproduction through regression testing.

A phased debugging workflow is necessary for hard bugs or performance regressions where ad hoc troubleshooting fails. It enforces a disciplined sequence from reproduction to regression testing, ensuring root cause isolation through clear hypotheses and deterministic feedback signals.

Yes, the systematic diagnosis loop is applicable to user reports of crashes, slowdowns, or unexpected behavior across codebases, services, and integrations. It relies on deterministic feedback signals, instrumentation, and clear hypotheses to guide the fix and verification phases.