I haven't seen "just absorb a giant ball of context and do the right thing the first time" be cracked yet, even for Opus 4.7.
At the end of the day, code is code, and we have decades of lessons about how to make code more reliable and maintainable. Composable small modules, not god methods, are still the way to go, and they reward devs who use them to get focused context for agents with faster - and often better - results.