Big Move! OpenAI Fully Open-Sources Codex Harness

OpenAI has open-sourced the three core components of Codex Harness (CLI tool, official SDK, and app-server), released under the Apache-2.0 license. As the underlying execution framework driving AI agents, Harness can be seamlessly embedded into developers' own products, completely moving away from the "general-purpose chat box" model. At the same time, it returns interface, data, and security approval control to developers, fully bridging the last mile for enterprise-level AI deployment.