Comment by gwd

> partly because the quality tends to degrade with the length of the context.

And as if to emphasize this, I was using opencode this morning with Sonnet; but once the context window got up close to 100k, only about 30% through implementing a new feature (which doesn't seem that large to me), it repeatedly failed with "Error: oldString not found in content or was found multiple times", which I take to mean that it wasn't generating patches in the right format.

This isn't the first time this has happened to me. Maybe my code is just more complicated than other people's, so it gets confused more easily. But having tools to manage the complexity the LLM is exposed to has been critical to making it useful.