I implemented the OAuth2.0 protocol in 3 different languages without a 3rd party library - entire spec implemented by hand. This was like ~2015 when many of the libraries that exist today didn't back then. I did this as a junior developer for multiple enterprise applications. At the end of the day it's not really that impressive.
In a single Saturday the LLM delivered the feature to my spec, passing my initial test cases, adding more tests, etc…
I went to bed that night feeling viscerally in my bones I was pairing with and guiding a senior engineer not a junior. The feature was delivered in one day and would have taken me a week to do myself.
I think stories like the Cloudflare story are happening all over right now. Staff level engineers are testing hypotheses and being surprised at the results.
Oauth 2.0 doesn’t really matter. If you can guide the model and clearly express requirements, boundaries, and context, then it’s likely to be very useful and valuable in its current form.
Maybe you just have that dream job where you only have to think hard thoughts. But that's just not the norm, even at a bleeding edge startup.