Alibaba releases Qwen Code 1.0, open-sourcing Qoder's Harness

On November 11, 2026, Alibaba announced the release of Qwen Code 1.0. The company said it has folded Harness capabilities previously developed inside Qoder into Qwen Code, and is opening Qwen Code 1.0 Preview together with the release, offering developers an Agent execution foundation that can be embedded in their own products.

According to Alibaba, Qwen Code 1.0 starts from an in-process in-memory event bus and evolves toward a distributed architecture along a unified event model. The design layers access, scheduling, and execution so they can scale independently, and uses a separation between reasoning orchestration and tool execution that Alibaba describes as separating the "hand" from the "brain." While keeping the existing entry points and return paths intact, the system moves from a single process hosting multiple sessions to multiple nodes hosting more sessions.

Alibaba states that the unified event mechanism not only connects entry points to tasks but also creates clear boundaries for capability extension and resource management. Processing units collaborate around events, with the model, sandbox, and external extensions managed separately, so the system can take on more tasks while remaining easier to extend, govern centrally, and control in cost. Processing units are extensible: reasoning, memory, and tooling capabilities can be attached on demand around events, reducing intrusion on the main execution flow. Model services connect through a unified entry point with configuration, access authorization, and call records managed centrally, cutting down on repeated integration and scattered maintenance. The reported material contains no further developments beyond this release and architecture description.