The Harness Stack

The post introduces the “Harness Stack,” a five-level taxonomy for AI agent configuration.

It places the model tool at Level 0, user-wide settings at Level 1, and project scaffolding at Level 2.

The framework aims to give developers a shared vocabulary for how agents are set up across tools like Claude Code, Cursor, and Copilot.

Better terminology, the author argues, will make it easier to share practices, debug setups, and build portable tooling across projects.