Autonomous Coding Agent Harnesses in Production: Comparing OpenHands, SWE-agent, Aider, and Cline
The transition from inline code completion to autonomous software engineering harnesses marks a structural shift in how frontier models interact with codebases. Where early coding assistants operated within narrow token completion windows, modern agentic harnesses construct closed action-observation loops. These systems inspect repository structures, invoke compiler toolchains, execute unit test suites, parse stdout diagnostics, and iteratively correct syntax and logic errors until a pull reques





