What problem does it solve? Bugs that survive the first obvious fix often get patched with guesses that hide the real cause. This Skill enforces a root-cause-first debugging discipline: build a failing feedback loop, test ranked hypotheses, and only then fix — plus it generates real debugger setups for your IDE when print-debugging stalls. ## Core Features & Use Cases - Systematic reproduction workflow: Builds a deterministic failing command (test, curl, or git bisect run wrapper) before any fix attempt, and ranks 3-5 falsifiable hypotheses to test in order. - Debugger config generation: Produces VS Code launch.json entries, JetBrains run configurations, and CLI fallbacks (node --inspect-brk, rust-lldb, gdb, rr) tailored to the bug location, with breakpoint locations and watch expressions. - Fix and lock-in: Commits the regression test first, fixes at the owning boundary, runs the full suite, and records the root cause. - Use Case: A flaky race condition in a Node service resists logging. The Skill raises the reproduction rate with a 100x loop, then generates an rr record/replay workflow or an attach config for the running server. ## Quick Start Ask the agent to help debug a failing test or endpoint and generate a VS Code launch.json configuration for it.