Ruby Debugging Tips and Recommendations in 2025 | Rails at Scale

Debugging is a crucial skill for any Ruby developer. And as the tools and techniques evolve, it’s important to keep up-to-date with the latest best practices. So here are some of my Ruby debugging tips and recommendations that I’d offer to Ruby developers in 2025. You can use the Ruby LSP extension to connect to debug.gem too. It requires a slightly different launch.json configuration (example) and provides better error handling for connection issues. Try using launch request in launch.json instead of attach. It simplifies the debugging process as you don’t need to manually start/stop the server. In most Rails projects, a simple entry like this will do:.