[Cthulhu_]

> Once you've filled in all those generated stubs, how can you then iterate on the API spec? The tooling will just give you more stubs that you have to manually merge in, and it'll get harder and harder to find the relevant updates as the API grows.

This is why I have never used generators to generate the API clients, only the models. Consuming a HTTP based API is just a single line function nowadays in web world, if you use e.g. react / tanstack query or write some simple utilities. The generaged clients are almost never good enough. That said, replacing the generator templates is an option in some of the generators, I've used the official openapi generator for a while which has many different generators, but I don't know if I'd recommend it because the generation is split between Java code and templates.