5why Root Cause Analysis

    1

    Systematic root cause analysis skill to find and fix the source of bugs, not just the symptoms.

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    Works with the AI tools you already use

    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIMuseMuseDotsDots+22 more

    5why-root-cause-analysis

    Example session with this skill installed

    The web worker keeps crashing once an hour under heavy load. Every time I restart it, it happens again. Can you help me find out why?

    • Read your context and instructions
    • Compiled the 5why-root-cause-analysis

    Analysis

    1. Why? Memory limit reached (Logs: Process OOM)
    2. Why? Heap grows linearly during requests
    3. Why? Response objects aren't garbage collected
    4. Why? Global EventBus is holding references to every request
      Root cause: Memory leak in event listener registration.
      Fix: Implementation of .off() in cleanup.

    Connects securely to your tools. The creator never sees your data.

    What you get

    Identify the source of intermittent production failures with evidenceDebug complex memory leaks or performance bottlenecks in distributed systemsAutomate diagnostic log gathering across multi-component boundariesPrevent recurring bugs by engineering permanent root-cause fixes

    About this skill

    Stop patching symptoms—eliminate root causes.

    The 5Why Root Cause Analysis skill transforms your AI agent from a quick-fix bot into a systematic troubleshooter. Based on the industrial-proven Toyota Production System methodology, this skill enforces a rigorous investigative framework to ensure bugs are killed at their source rather than temporarily masked.

    What it does

    When triggered by a bug report or system failure, the skill initiates a multi-phase investigation:

    • Recursive 5Why Inquiry: It systematically peels back layers of causality, preventing "obvious" guesses from clouding the true origin of an error.
    • Evidence-Based Collection: It generates and executes diagnostic commands to verify data at component boundaries before proposing any code changes.
    • Root Cause Identification: It pinpoint failures in logic, environment, or architecture that lead to recurring issues.
    • Permanent Fix Implementation: It outputs solutions that target the terminal "Why," such as adding validation filters or hardening infrastructure, rather than just restarting a service or silencing a warning.

    Why developer teams need this

    Traditional AI prompting often results in "hallucinated fixes" where the agent tries to solve a symptom without understanding the system state. This skill forces the agent to prove its findings with logs and environment checks before touching your codebase, significantly reducing technical debt and regression rates.

    How to install

    Works the same in every agent - Claude, Cursor, Codex, Copilot and 20+ more.

    ~30 seconds
    1. 1

      Download the ZIP

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    2. 2

      Unzip into your skills folder

      Every agent reads skills from one folder on your machine. Drop the unzipped folder in there.

    3. 3

      Ask your agent to use it

      Restart the agent if it was already running. It picks the skill up automatically - no config needed.

    Skills folder by agent

    Click the path to copy it. Create the folder if it does not exist yet.

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    Recently published to Agensi

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    Verified clean 3 months ago

    • Passed all security checks, Safe to install

    Listed3 months ago

    What's inside

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