How to Keep AI Coding Agents from Hallucinating: A Guide to Harness Engineering
AI coding agents (like Claude Code, Devin, or open-source equivalents like OpenClaw) are incredibly powerful. They can navigate directories, write tests, refactor modules, and submit PRs.
Yet, if you drop them into a raw repository without boundaries, they suffer from context window pollution, agent amnesia, and scope drift. A simple bug-fix refactor can trigger a 6-hour loop where the agent rewires half the project, deletes unrelated tests, and gets stuck in "process theater."
To fix this, we need Harness Engineering.
What is Harness Engineering?







