It might be like how an archeologist since the invention of plastic can date the period of the soil as post plastic, if one could cut open the software stack of the coming systems that will be built in the near future one would could data that code as post agentic LLM as programs are going to be mostly bloated ad-hoc, poorly thought-out and patched in a way that does not concern it's self with the correctness of the algorithms or data structures chosen.
I am not Anti-AI but I think it's going to be interesting and I am surprised at how bad a program ends up when one tries to "vibe code", though often ends up working, though in isolation and when used with discipline (that the tools themselves psychologically make it harder to do) can produce some very good code and being able to use loops to solve difficult problems or problems that simply would have require banging ones head against the problem many times is very profitable.