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Root Cause Analysis

Traces software bugs to their root cause using the 5 Whys protocol and file:line evidence.

1|Updated Feb 5, 2026
Search Tags:#code quality#debugging#troubleshooting#root cause analysis#bug fixing#5 whys
One-click install
npx skills add https://github.com/fysoul17/devlyn-cli --skill root-cause-analysis-fysoul17
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Root Cause Analysis
Source: https://github.com/fysoul17/devlyn-cli/tree/main/config/skills/root-cause-analysis
Command: npx skills add https://github.com/fysoul17/devlyn-cli --skill root-cause-analysis-fysoul17

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill provides a structured methodology for investigating and resolving bugs, issues, and unexpected behavior in code, ensuring that fixes address the fundamental cause rather than just symptoms.

Core Features & Use Cases

  • Systematic Diagnosis: Employs the "5 Whys" protocol to trace issues from symptom to root cause.
  • Evidence-Based Hypotheses: Requires specific file:line references for all claims, promoting code-level investigation.
  • No-Workaround Rule: Enforces fixing the root cause rather than implementing temporary patches.
  • Use Case: When a critical bug is reported, this Skill guides the developer through a rigorous process to identify the exact line of code and the underlying reason for the failure, preventing recurrence.

Quick Start

Use the root cause analysis skill to diagnose the bug reported in the latest error log.

Frequently Asked Questions about Root Cause Analysis

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What is the 5 Whys protocol for software debugging?▼

Root cause analysis in software debugging identifies the fundamental cause of bugs instead of treating symptoms. It uses the 5 Whys protocol and evidence-based investigation with specific file:line references to enforce no-workaround fixes.

How do I fix recurring bugs by finding the root cause in my codebase?▼

To fix recurring bugs, perform a systematic root cause analysis by tracing the issue through your codebase using the 5 Whys protocol. You must provide specific file:line references as evidence and adhere to a no-workaround rule to ensure a fundamental fix.

Does root cause analysis require specific file and line references for debugging?▼

Root cause analysis requires specific file:line references for all debugging claims. This evidence-based investigation enforces code-level verification to validate hypotheses and ensure no-workaround fixes.

When should I use the 5 Whys methodology instead of applying a quick patch?▼

Use the 5 Whys methodology when diagnosing critical bugs, unexpected behavior, or error logs that require fundamental fixes. A strict no-workaround rule prevents temporary patches that allow underlying code issues to recur.

Can I use root cause analysis for diagnosing unexpected behavior and error logs?▼

Root cause analysis applies to diagnosing unexpected behavior and error logs. It systematically traces reported symptoms to their underlying cause within the codebase using the 5 Whys protocol and evidence-based investigation.

What are the limitations of using a no-workaround rule for bug fixing?▼

A strict no-workaround rule in bug fixing prohibits temporary patches entirely. This requires additional time to trace issues to their fundamental cause using the 5 Whys protocol before implementing a permanent, evidence-based resolution.

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