#4 — Harness Engineering: What Claude Code Accidentally Taught Everyone

A packaging mistake exposed Claude Code's full source tree to the world — and instead of scandal, the community got a masterclass in how agentic coding tools actually work under the hood. In this episode, Andrey, Vladimir, and Fernando unpack what the disclosure revealed about the engineering behind coding agents, introduce the emerging discipline of "harness engineering," and argue that the model is only the horsepower — it is the harness that determines whether the agent gallops toward the right destination or off a cliff. Along the way, they weigh in on NVIDIA's OpenShell sandboxing, Cursor 3.0's agent-first interface, and why Docker containers are not the security blanket many DevOps engineers assume them to be. Episode page (show notes and links): https://getboris.ai/insights/004-harness-engineering-what-claude-code-accidentally-taught-everyone/