Agent skill · data analytics · wshobson
parallel-debugging
Debug complex issues using competing hypotheses with parallel investigation, evidence collection, and root cause arbitration. Use this skill when debugging bugs with multiple potential causes, performing root cause analysis, or organizing parallel investigation workflows.
Why this skill is useful
Provides a structured framework for root cause analysis and evidence collection that the AI wouldn't reliably generate on its own.
What it needs
About 3k tokens when loaded. Last updated 2026-08-05. 38,570 stars on the source repository.
What this skill does
Parallel Debugging Framework for debugging complex issues using the Analysis of Competing Hypotheses (ACH) methodology with parallel agent investigation. When to Use This Skill Bug has multiple plausible root causes Initial debugging attempts haven't identified the issue Issue spans multiple modules or components Need systematic root cause analysis with evidence Want to avoid confirmation bias in debugging Hypothesis Generation Framework Generate hypotheses across 6 failure mode categories: 1. Logic Error Incorrect conditional logic (wrong operator, missing case) Off-by-one errors in loops or array access Missing edge case handling Incorrect algorithm implementation 2. Data Issue Invalid or unexpected input data Type mismatch or coercion error Null/undefined/None where value expected Encoding or serialization problem Data truncation or overflow 3. State Problem Race condition between concurrent operations Stale cache returning outdated data Incorrect initialization or default values Unintended mutation of shared state State machine transition error 4. Integration Failure API contract violation (request/response mismatch) Version incompatibility between components Configuration mismatch between environments Missing or incorrect environment variables Network timeout or connection failure 5. Resource Issue Memory leak causing gradual degradation Connection pool exhaustion File descriptor or handle leak Disk space or quota exceeded CPU saturation from inefficient processing 6. …
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills wshobson/parallel-debugging