Bringing more agent harnesses and frameworks to Cloudflare, starting with Flue (blog.cloudflare.com)

Cloudflare has announced the upcoming deployment of new agent harnesses and frameworks, starting with Flue, set for production in 2026. These harnesses, including established systems like Codex and Project Think, have evolved to support agents as reliable infrastructure rather than mere prototypes. The significance lies in addressing persistent challenges that agents face in cloud environments, such as maintaining context after interruptions, securely executing untrusted code, and utilizing the tools they were trained to use. To tackle these challenges, Cloudflare is introducing a three-layer stack consisting of the Flue framework, agent harnesses like Pi, and the foundational Cloudflare Agents SDK, ensuring effective management of compute, state, and storage. Flue, recently launched in beta, redefines agent creation by allowing developers to describe an agent's knowledge and context rather than scripting its actions, streamlining automation. Its seamless integration with platforms like Slack and GitHub enhances usability, while mechanisms like Durable Streams prevent loss of agent state through a log of execution history. Moreover, Flue utilizes Cloudflare’s infrastructure for efficient deployment as Durable Objects, enabling reliable and scalable execution. This innovative framework empowers developers to create more sophisticated, production-ready agents that efficiently leverage cloud resources while mitigating the persistent issues of distributed systems.