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debug

Reproduce failures, isolate root causes, and create verified regression fixes.

1|Updated Jun 29, 2026
Search Tags:#debugging#root cause analysis#bug fixing#verification#regression#software testing
One-click install
npx skills add https://github.com/mckissinger/keel --skill debug-mckissinger
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: debug
Source: https://github.com/mckissinger/keel/tree/main/skills/debug
Command: npx skills add https://github.com/mckissinger/keel --skill debug-mckissinger

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps teams move beyond symptom fixes by providing a disciplined process for reproducing failures, identifying true causes, and locking in durable fixes.

Core Features & Use Cases

  • Root-Cause Investigation: Guides debugging through reproduction, isolation, diagnosis, and verification instead of guesswork.
  • Regression Prevention: Ensures fixes are protected with tests at the lowest layer that can reproduce the defect.
  • Use Case: When an application feature breaks unexpectedly, use this Skill to trace the failure, determine the underlying cause, route the fix through the correct workflow, and record the learning for future work.

Quick Start

Use the debug skill to investigate the failing feature, identify the root cause, and create a verified regression fix.

Frequently Asked Questions about debug

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

FAQPage Schema
How do I find the root cause of a runtime failure instead of just fixing the symptom?▼

Root cause analysis requires reproducing the runtime failure to isolate the exact trigger. A disciplined debugging process moves beyond symptom fixes by diagnosing the underlying cause and verifying the resolution with regression coverage.

What is the best way to prevent regressions when fixing application bugs?▼

Preventing regressions involves adding a test at the lowest layer capable of reproducing the defect. This ensures the application bug fix is verified and prevents recurring issues in structured development workflows.

How do I debug test failures within a structured development workflow?▼

Debugging test failures requires reproducing the failure, isolating the cause, and routing the fix through the correct workflow. Disciplined verification and durable learning records maintain reliable software changes.

Does this debugging approach work for stack-specific problems and runtime failures?▼

Yes, this approach applies to debugging application bugs, runtime failures, test failures, and stack-specific problems. It isolates causes within structured development workflows to ensure reliable software changes.

When should I use a structured root cause investigation process for software testing?▼

Use root cause investigation when an application feature breaks unexpectedly and guesswork is insufficient. It guides debugging through reproduction, isolation, diagnosis, and verification to resolve software defects.

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