Root Cause Tracing

Quick Review

Excellent systematic debugging skill that teaches backward tracing through call stacks to find root causes rather than fixing symptoms. The SKILL.md is well-structured with clear decision trees, concrete examples, and a complete tracing methodology. It provides actionable steps, code instrumentation techniques, and references a bisection script for test pollution. The description is clear enough for invocation, though it could be slightly more explicit about inputs/outputs. High task knowledge with real-world examples and multi-layer defense strategies. The novelty is moderate-to-good: while experienced developers know this approach, codifying it systematically with scripts and concrete patterns saves tokens and provides structure that a CLI agent would otherwise need to discover through trial-and-error.