Build and own your harness, folks. Very few people understand the magic behind customizing and optimizing an agent harness for your work. You can start seeing incredible results quickly, even with a minimal harness. Just better code, better outputs, better costs, better writing, and so on. As an example, I see way too many people complain that they are tired of their out-of-the-box agent harness producing verbose outputs. If you built a harness, that's easier to fix with a system prompt…