Is there an accepted definition on what a harness is? Is this like GasTown and similar? Plan mode? Is this a client-side loop with multi-threaded agents running in parallel? If the AI client is doing this on its own, is that considered agentic and/or using a harness? Or does the introduction of saving text to a MD file make it "self learning" a harness?

It feels like the pace at which the industry is defining things may be faster than the actual pace of change sometimes.