Cloudflare previews Project Think

Cloudflare previewed Project Think on April 15, pitching it as the next generation of its Agents software development kit for long-running artificial intelligence agents. (blog.cloudflare.com) An artificial intelligence agent is software that can choose tools, take multi-step actions, and keep working after one response. Cloudflare said Project Think adds durable execution, sub-agents, persistent sessions, and sandboxed code execution to handle that kind of workload. (blog.cloudflare.com, blog.cloudflare.com) Cloudflare said the preview includes an “opinionated” base class that bundles those pieces together, alongside lower-level primitives for developers who want to assemble their own systems. The company described the shift as moving from lightweight building blocks to a more complete platform for agents that can “think, act, and persist.” (blog.cloudflare.com) The company’s pitch is that agent software does not behave like a normal web app serving many users from one shared instance. In the Project Think post, Cloudflare said agents are often one-to-one, with each user or task needing its own state, tools, and memory. (blog.cloudflare.com) Cloudflare tied that argument to cost. In its April 13 Agent Cloud announcement, the company said always-on virtual servers and isolated sandboxes are too expensive for a future where each worker might run dozens of personal agents at once. (cloudflare.com) Project Think builds on Cloudflare’s earlier Agents software development kit, which the company introduced on February 25, 2025 as a JavaScript framework for building artificial intelligence agents on Workers. In a June 25, 2025 post with OpenAI, Cloudflare described its role as the execution layer: the place where an agent lives, stores state, and runs across Cloudflare’s network. (blog.cloudflare.com, blog.cloudflare.com) The new preview adds several pieces aimed at making those agents less brittle. Cloudflare said durable execution uses fibers for crash recovery and checkpointing, sub-agents get their own SQLite databases and typed remote procedure calls, and persistent sessions support message trees, forking, compaction, and full-text search. (blog.cloudflare.com) Cloudflare also said Project Think gives agents more places to run code, from a built-in workspace up to browser and sandbox environments. The company called that an “execution ladder,” with the idea that an agent can start in a constrained environment and move to broader access only when needed. (blog.cloudflare.com) The preview arrives as Cloudflare broadens what it calls Agent Cloud. In the April 13 press release, Chief Executive Officer Matthew Prince said the company had spent nine years building the foundation with Workers and was now trying to make Cloudflare “the definitive platform for the agentic web.” (cloudflare.com) Cloudflare has not presented Project Think as finished. The company called it a preview, and activity in the public `cloudflare/agents` repository shows recent “think” commits, including lifecycle hooks, dynamic context, an extension manifest, and a built-in workspace in the days before the announcement. (github.com, blog.cloudflare.com)