This paper doesn't make any sense - for background, I've maintained an AI client that's cross-platform, cross-provider, and integrates llama.cpp since 2022. I don't know why they think "agents" don't share prefill work - paid providers cache on the prefill text, llama.cpp, same, and I specifically hooked up llama.cpp so it can do subsets as well. i.e. all the agents would reuse the cache

It reads like it started from an underspecification of "agents" x a strain of pop-wisdom about "KV cache" that I've seen enter mainstream discourse over the past 3 months that is Not Even Wrong, then, they solved a non-existent problem.

EDIT: based on the rest of comments either requesting a primer on terms, or, pointing out it makes errors in even more obvious ways, flagging.

I don't think Luoyuan Zhang is necessarily doing this, but I'm pretty sure lots of people are using arxiv as a glorified blog and hoping no one notices.