Hey builders , am I the only one who feel our code generation tools fail on developing other agents?

When I ask to develop BE and FE everything is going smoothly and better then I can do manually but just I want to develop and agent with another agent - the circus with monkeys comes in my town.

By agents ( developers) I mean Codex , Claude Code ( I tried KIMI Code as well ) and by other agents I mean , well, smth similar but running as web app. So these guys ( agent developers ) totally ignore my instructions and always tend to "test and harness" rather then implement what I am asking for, with maniac determination limit agentic routing with caps, input / output validators and similar stuff.