Building the harness around our coding agents: eight failure modes, eight pillars (opens in new tab)

Teams building with AI usually end up building two products: the thing they ship, and the system around their agents that makes them useful in building the thing they ship. We built such a system to help us ship Nimbalyst. We call it our team harness. This post is about what we learned from doing it. What a harness is A harness is the durable layer around a model: instructions, tools, permissions, context, and verification. Claude Code and Codex are harnesses in this sense. Each wraps a model...