Building Your Own Agent Harness &#xA; I&rsquo;ve been trying to write about coding agents for a while. Each time I sit down, the ground has&#xA;shifted. The models change, my own workflow changes, and whatever I had to say feels stale before I&#xA;finish saying it. &#xA; But one thing has stayed constant through all of it: the agents that produce good work are the ones&#xA;that know how I work. My…