im excited about agent harnesses because i think are the first stable agent abstractions we can build on top (which is why we're investing so much in deepagents) we always wanted to run llms in a loop and have them call tools (remember autoGPT? that's all that was) but the models weren't good enough so we built chains and other architectures as a proxy as the models got better, the "right" way to build the most agentic systems changed pretty dramatically which meant the frameworks (like…