Everyone is saying “it’s the harness, not the model.” But...no one is really explaining what that means. I wanted to understand harness engineering better, so on today's episode of How I AI, I built my own: a custom harness using @ClaudeDevs SDK to triage @sentry bugs, verify root cause, and ship fixes. The big unlock? Realizing a custom harness lets you stop micromanaging chats and get agents that do exactly what you want. Full tutorial now on YT: https://youtu.be/ofS-4RRw9zw