The speaker says harnesses used to be suited mainly to specific tasks such as code, where models had been trained on the relevant codebase.

“They typically used to only really do them for like specific things like code.”

“like you know they could deal with your code base because it was trained on it but now it's more around what this blog is talking about which is compositionality and the fact that like i think harnesses we want to have language model systems that have much more control over the actions they make at every step”