Cognition moves the Dioxus team onto Devin's virtual machines and testing systems

After a model emits a patch, the remaining work is mechanical. Something has to provision a machine, expose the development tools, drive whatever interface the application presents, run the result, and check whether it worked. Cognition says bringing in Dioxus gives it more control over that sequence ^[11]. Dioxus had already begun building the same machinery, so that AI agents could write, run and test software across operating systems ^[20].

That machinery has a name. Kelley wrote in Dioxus' account of the deal that stronger AI-generated Rust code and growing demand for cross-platform libraries pushed the project toward a cloud coding harness called SkyVM ^[6]. Dioxus says SkyVM supports macOS, iOS, Android, Linux and Windows, with virtual-machine snapshotting, forking and rollback ^[7]. Forking is the part that matters in an agent loop. An agent that forks a warm machine per candidate change does not rebuild the environment for each attempt, and a bad attempt ends in a rollback instead of a fresh install.

Dioxus also claims new virtual machines can spawn or resume in under 50 milliseconds, a figure that has not been independently established ^[8]. Taken at face value, that is 20 spawns or resumes per second on one host, run back to back ^[18]. Whether it transfers depends entirely on what the measurement includes. If the resumed machine comes back with the toolchain loaded, the repository checked out and dependencies installed, the number is the one an agent loop actually feels; if it covers a bare boot, dependency installation still dominates the wall clock, and the announcement does not say which was measured ^[8].

The emphasis on execution is continuity, not a new discovery. Cognition's own SWE-bench technical report described testing and environmental feedback as central to Devin's ability to correct mistakes during longer tasks ^[9].

No party has said the raise paid for the team. The money and the arrival were announced a day apart, and that ordering is the entire documented link between them ^[4].

Kelley started Dioxus as a side project while studying at Franklin W. Olin College of Engineering, and by Y Combinator's Summer 2023 batch he was presenting himself as its solo founder ^[13]. Before Dioxus he worked as a systems engineer at Cloudflare on the 1.1.1.1 DNS service and the WARP networking product, according to his GOSIM speaker profile ^[12]. For a company staffing a virtual-machine harness, the recent line is the relevant one: Cognition says the team's work had already moved into cloud development environments, virtualization and operating-system support ^[15].