Isac Builds

Harness Engineering: The Skill That Separates AI-Native Devs Harness engineering is the discipline of building everything around an LLM to make it a reliable production system. Not prompt engineering. Not picking the right model. The real skill is designing the tools, memory, guardrails, and orchestration that turn raw model intelligence into consistent, useful output. If you’ve been wondering why some developers ship 10x with AI while others struggle with the same models, this is the answer. ...

I use AI coding agents every day. Not occasionally. It’s core to how I work. Claude Code, Codex, Cursor. At any given moment I might have 3 or 4 of them running in parallel across different git worktrees, each one tackling a different task while I stay focused on the bigger picture. It works. Until it doesn’t. The Problem No One Was Solving When you run multiple agents at once, you’re supposed to be orchestrating. In practice, you’re firefighting. ...