One interesting harness thing I saw Cursor do is to give the model access to the entire thread. Even if it doesn't fit in the context window, the model can sea

One interesting harness thing I saw Cursor do is to give the model access to the entire thread. Even if it doesn't fit in the context window, the model can search through past turns and sanity check if something doesn't seem to be going right, or be prompted to follow an early message, "when starting on a new item, review the first message for how we should approach this"