Whatever we're moving toward, I currently can't let any SOTA model + harness operate on more than ~10k changed SLOC at once, and even then only with very careful prompting I thoroughly understand, only on the simplest of problems, and only if I pause it at key points to correct some sort of nonsense thinking and put in a significant cleanup pass and am still willing to tolerate some bullshit. Tooling is impressive for sure, but it's not magic.