What problem does it solve?
This Skill helps diagnose difficult bugs and performance regressions by turning vague symptoms into a structured, reproducible investigation. It is designed to reduce guesswork and move quickly from failure to root cause.
Core Features & Use Cases
- Build a feedback loop: Create a fast, deterministic repro using tests, scripts, browser automation, or harnesses.
- Reproduce and narrow: Confirm the exact failure mode, then minimise the scenario until the cause becomes clearer.
- Hypothesise and instrument: Rank falsifiable explanations, add targeted probes, and compare predictions one at a time.
- Fix and lock it in: Add a regression test at the correct seam, verify the fix, and clean up debug instrumentation.
- Use case: A React page crashes only sometimes after a recent change; this Skill helps reproduce it, isolate the triggering condition, and verify the repair.
Quick Start
Use the diagnose skill to reproduce the bug, propose ranked hypotheses, and build a minimal failing test or script that proves the root cause.