
a plain yes-or-no decision inside agent can cost up to 400x more than it has to Harrison Chase, LangChain's CEO, spent 47 mins on what's actually inside an agent's harness 08:27 - what actually counts as a harness 18:14 - the building blocks of an agent 29:51 - why agents need a sandbox 32:37 - sandboxes against prompt injection 41:51 - the mess of evaluating agents watch this first, then read the article below on the model built to handle that decision for a fraction of the price
