How does it isolate specific bugs within a codebase?

The skill uses a combination of log analysis, git history inspection, and reproduction scripts in the Rails console to narrow down the specific cause of a failure.

How does the Rails Debugger skill help with N+1 queries?

It analyzes development logs to identify redundant SELECT statements and suggests optimized queries using ActiveRecord methods like .includes or .preload.

Can it handle database migration issues?

Yes, it checks migration status, inspects the schema dump, and validates database consistency to resolve common ActiveRecord and migration errors.

Does it support major Ruby testing frameworks?

Yes, it is designed to run and analyze output from RSpec, Minitest, and other standard Rails testing tools to identify exactly why a suite is failing.

Rails Debugger

Name: Rails Debugger
Author: majesticlabs-dev

bymajesticlabs-dev

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Security & Testing

Diagnoses and resolves Ruby on Rails errors, test failures, and performance bottlenecks through systematic root cause analysis.

The Rails Debugger skill empowers Claude to act as a senior Ruby on Rails engineer by providing a structured framework for identifying and fixing application issues. It systematically analyzes stack traces, inspects logs, validates database states, and reproduces bugs in the Rails console to isolate problematic code. By combining deep domain knowledge of common Rails pitfalls—such as N+1 queries, routing conflicts, and callback loops—with hypothesis-driven testing, it ensures that fixes are effective, documented, and verified against regressions.

Key Features

01Systematic database integrity checks including migration status and schema validation

02Standardized bug validation reporting with root cause, evidence, and prevention steps

03Automated stack trace analysis to pinpoint the exact origin of application errors

049 GitHub stars

05Performance optimization for common issues like N+1 queries and slow associations

06Bug reproduction and isolation using the Rails console and binary search techniques

Use Cases

01Analyzing complex ActiveRecord association issues and callback side-effects

02Troubleshooting production errors and exceptions captured in development logs

03Resolving failing CI/CD builds and fixing flaky RSpec or Minitest test suites

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add majesticlabs-dev/majestic-marketplace rails-debugger

For use in Claude.ai and ChatGPT

Download Skill