HarnessRouter open-sources one API to run Codex, Claude Code and 14 agent harnesses
gaganghotra_ · x · 2026-09-21
Developers have open-sourced HarnessRouter, pitched as an "OpenRouter for agent harnesses." It turns harnesses like Codex, Claude Code, Hermes, DeepSeek Harness, and System One into plug-and-play agent backends behind a single API, handling sessions, streaming, files, cancellation, and failure handling so you can switch harnesses without re-implementations.
- Implements the open Unified Harness Protocol (UHP) with an OpenAI Responses-compatible API
- Self-hosted, Apache-2.0 community edition; your keys, your infrastructure
- Harnesses run locally; repo has 1.6k stars
Related event: HarnessRouter open-sources unified API for routing multiple agent harnesses(3 posts)→
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