What problem does it solve? Hard bugs and performance regressions resist casual debugging: staring at code rarely finds the cause. This Skill enforces a disciplined diagnosis loop that builds a tight, deterministic pass/fail signal first, then reproduces, minimizes, hypothesizes, instruments, fixes, and cleans up. ## Core Features & Use Cases - Feedback Loop Construction: Ten ranked strategies for building a red-capable repro command, from failing tests and curl scripts to Playwright browser automation, trace replay, fuzz loops, and git bisect harnesses. - Structured Six-Phase Process: Build the loop, reproduce and minimize, generate 3-5 falsifiable ranked hypotheses, instrument with tagged debug logs, write regression tests before fixes, and clean up all instrumentation. - Non-Deterministic Bug Handling: Techniques to raise reproduction rates through repetition, parallelization, stress, and timing injection until flaky bugs become debuggable. - Use Case: A user reports that an export button intermittently throws an error. The Skill guides building a headless browser loop that reproduces the failure, minimizing the scenario, testing ranked hypotheses one variable at a time, and landing a fix with a regression test. ## Quick Start Ask the assistant to diagnose the bug you are experiencing and describe the exact symptom, error message, or slowdown you observed.
