Harness²: Recursive Agent Harnessing for Open-World Tasks

Published 16 October 2026

Harness² is a plug-and-play framework that improves agent execution harnesses through recursive Propose–Probe–Compose refinement and persistent lessons, while keeping model weights fixed. It supports parallel and sequential recursion, OpenCode and Codex executors, and JobBench, LAB, and WorkBuddy-Bench.