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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
It's unclear what the superpowers would be? Video doesn't show anything I can't do with an IDE or decent code editor, and there I also have refactoring tools, metadata like indicators for usages that can be used for navigating and so on.
Reminds me of UML-like diagrams over relational databases, except that it's generated one piece at a time. In practice I generate diagrams showing cyclomatic complexity much more often, and for code exploration outside the IDE I'd use ast-grep.
https://ast-grep.github.io/
There's this: https://github.com/StevenReiss/bubbles
I think Andrew Bragdon moved on from it and Steven Reiss (one of his coadvisors when Andrew initially created it) has appropriated it to some extent. Seems mostly dead though.