More screenshots

    Works with the AI Agents you already use

    Claude CodeClaude CodeCursorCursorCodex CLICodex CLIDeepSeekDeepSeekMuseMuse+22 more

    Systematic Bug Diagnosis — Root Cause, Not Guesswork

    1

    Finds why an app bug is happening using a step-by-step method (reproduce, isolate, test ideas, 5 Whys), then gives a small correct fix and a regression test — without guessing first.

    $12

    Secure checkout via Stripe

    Money-back guarantee

    Converts to your local currency at checkout

    Security scanned
    Systematic Bug Diagnosis — Root Cause, Not Guesswork

    Systematic Bug Diagnosis — Root Cause, Not Guesswork

    Example session with this skill installed

    ends UTC (Z); API TZ=America/Chicago
    Symptom: 8h shift stored as 13.0h; naive unit tests pass

    clock_out:
    started = started.astimezone().replace(tzinfo=None) # local wall
    ended = ended.replace(tzinfo=None) # UTC wall kept
    hours = (ended - started) / 3600

    log: 08:00Z–16:00Z → hours_computed = 13.0

    • Read your context and instructions
    • Compiled the systematic bug diagnosis

    Class: environment | Stage: FIX | Confidence: CONFIRMED | Reproducible: yes

    H3 CONFIRMED: asymmetric normalize
    start → Chicago wall (08:00Z → 03:00)
    end → UTC wall kept (16:00)
    → 13.0h lie; true UTC delta = 8.0

    Root cause: duration mixed local-converted start with UTC-stripped end
    Fix: both sides astimezone(UTC) before subtract
    Regression: clock_out(08:00Z, 16:00Z) asserts 8.0

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

    About this skill

    The problem

    • Guessing at fixes wastes hours and often papers over the real cause.
    • Symptoms (wrong hours, weird totals, flaky tests) get “fixed” in the UI while the root bug stays.
    • Teams need a shared, evidence-first debugging process — not another “try this” chat.

    What it does

    • Runs a scientific debugging workflow: reproduce → isolate → hypothesize → test → root cause → fix → verify.
    • Classifies the bug (logic, state, type, race, environment, integration, data, regression) and picks a matching strategy.
    • Tracks hypotheses with evidence for/against and a next experiment for each.
    • Builds a 5-Whys chain that separates the symptom from the root cause.
    • Proposes a minimal fix plus a regression test, with honest confidence: CONFIRMED / PROBABLE / SPECULATIVE.

    Frameworks & tools

    • Language-agnostic method; works on any stack when you provide code, errors, and context.
    • Uses failing tests, logs, and diffs you already have — no special SaaS debugger required.
    • SKILL.md workflow for Claude Code, Cursor, Codex CLI, OpenClaw, and similar agents.

    Why this beats prompting it yourself

    • Anti-guessing rule: no “the answer” fix until the cause is CONFIRMED or PROBABLE.
    • If it cannot reproduce, you get a reproduction plan — not a random patch.
    • Hypothesis table and 5 Whys keep the investigation honest and reviewable.
    • Bug-class strategies (e.g. race vs environment) change how it debugs.
    • Regression test is part of the deliverable so the bug stays fixed.

    Find more skills like this on the Claude Skills Marketplace, the Codex Skills Marketplace and the Gemini Skills Marketplace, or browse Claude Skills for Testing & Debugging.

    • Cannot execute your app unless you run the suggested experiments
    • Heisenbugs may need several rounds
    • Not for CI/CD pipeline, CrashLoop, or Helm/deploy failures
    • Does not apply fixes unless you explicitly ask
    • Confidence stays SPECULATIVE when evidence is thin — by design

    How to use

    1. 1

      Connect your agent to the Agensi MCP

      Copy the prompt and paste it into Claude, ChatGPT, Cursor or any agent that supports MCP. It sets up the connection for you. Manual setup

    2. 2

      Sign in to Agensi

      Your agent shows a sign-in link. Sign in and click Allow.

    3. 3

      Ask for what you need

      Your agent loads this skill and uses it on your task. It always asks before buying a skill.

    Reviews

    No reviews yet

    Be one of the first to try it. Every listed skill goes through the trust checks below.

    Security scanned

    Checked by our 8-point scan before listing

    Fresh listing

    Recently published to Agensi

    Money-back guarantee

    Doesn't do what its page promises? You get your money back.

    Trust & safety

    Security scan

    Security scan passed 20 days ago

    Permissions

    Read Files

    This skill only analyzes the code and symptoms you provide. It drafts a diagnosis, a suggested fix, and a test for you to apply. It does not change your repo, run installs, call the network, or read secret env values on its own. Grant Read only; leave Shell, Write, Browser, Network, and Env off unless you later ask the agent to apply a fix.

    Listed3 months ago

    What's inside

    Frequently Asked Questions

    This skill replaces 'guess-and-check' debugging with a scientific workflow that uses isolation and the 5 Whys to find the source of an issue, ensuring you fix the actual bug rather than just patching a symptom.

    The skill is language-agnostic and designed to work with any environment where you can provide code snippets, logs, or error messages, making it compatible with any tech stack.

    It is designed for use with popular agentic platforms like Claude Code, Cursor, Codex CLI, and OpenClaw, following a structured SKILL.md workflow for easy integration.

    You receive the specialized debugging framework, the hypothesis tracking system, the 5 Whys analysis protocol, and the instructions needed to implement the workflow in your chosen agent.

    If the agent cannot reproduce the bug with the data provided, it pauses the fix attempt and generates a detailed reproduction plan for you to follow, preventing speculative patches.

    Yes, each root cause analysis concludes with a minimal fix and a mandatory regression test plan to ensure the bug is verified and does not reappear in future builds.

    New in Testing & Debugging