So you now have 400Kloc of Rust code? Doing what? How much of that is "new"?

I can't get Augment / Opus 4.5 to edit a few C++ files from within VSCode without going off on a wild goose chase or getting stuck in an infinite loop after I tell that it should be doing this: "oh, you're right, I need to do X", "To do X, I must understand how to do Y", "I see now that to do Y, I should look at at Z". "Let me look at Z", followed by: "oh, you're right, I need to do X"..

To be fair, humans editing C++ also go on wild goose chases. Have you seen the insanity the C++ committee has ratified?