Agent Harnesses Open Source Projects
Discover 2 open source Agent Harnesses repositories from GitHub, each with an analysis of what it does, key features, use cases and alternatives. Agent Harnesses projects here are most often combined with AI Agents, Agent Orchestration and API. Last updated October 20, 2026.
harnessrouter: Unify Agent Harnesses Behind One API
HarnessRouter is a self-hosted Python service built around the Unified Harness Protocol (UHP), with an OpenAI Responses-compatible API for agent harnesses such as Codex and Claude Code. It gives product teams one interface for sessions, streaming, files, cancellation, and failures.
NewHealth 80/100
best-of-Agent-Harnesses: Find and Compare AI Agent Harnesses
A curated, regularly rescored guide to AI agent harnesses, orchestration frameworks, and techniques. Browse rankings and comparisons, or query the project data through its MCP server, JSON, and llms.txt.
ActiveHealth 45/100