Self-plug: I built Stenography(https://stenography.dev/) that does this for any codebase using smart parsing. The VSC code extension automatically writes code documentation
This looks cool, but I’d be more tempted to sign up if I could see examples of the documentation it can produce unassisted from an example codebase. My biggest concern is that the documentation would lack global context in a large file tree, and only be suitable for explaining small, self-contained files. The time investment to see if this is true or not is a bit too high as it is, so anything you can do to showcase the quality up-front might win you more signups.
Man, you're cover of redbone made me want to try it out haha