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OpenHarness

Build capable, general-purpose AI agents in code.

Open-source, code-first composable SDK for building capable AI agents, with agent/session primitives, tools, middleware, subagents, MCP support, and React/Vue UI integrations.

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releasePRIMARY2026-05-02

Agent Harness Framework launches with Daytona default sandbox

The Agent Harness Framework started rolling out with Daytona as the default sandbox, and Fred Schott reported 35 pull requests on day one. The launch matters because it gives builders a packaged sandbox baseline instead of wiring execution isolation and agent environment management from scratch.