I’ve been working on an open-source tool to help visualize JavaScript/TypeScript codebases (React, Next.js, Node.js). The core idea is building a dependency graph at the function/component level and exploring relationships across the codebase.

One feature that turned out to be particularly useful is what I think of as “blast radius”, If you change a function or component, what other parts of the system are affected?

This has been especially helpful when thinking about PR reviews, not just what changed, but what the change might impact indirectly.

It’s still early, and I am working on the cloud version which will include LLM interface to interact with graph and other team collaboration feature and github connection but I’d really appreciate feedback from others who might find this tool useful, and I invite anyone and everyone to contribute to the open source github repo.

Github: https://github.com/devlensio/devlensOSS Landing page: https://devlens.io/