Visual Studio Code 1.135 introduces the Agent Host Protocol, which allows coding sessions to transition seamlessly between applications while utilizing AI agents. An experimental feature called "Rubber Duck" enables AI models to review each other's work, significantly improving performance on coding benchmarks. The update also includes the ability to resume work from other tools through External Agent Sessions, although this requires a Copilot subscription. Microsoft has reverted the sandboxing feature to focus on developing the new host infrastructure and a streamlined user interface, emphasizing a commitment to making VS Code a universal runtime for AI coding agents
Visual Studio Code 1.135 Brings Agent Host Protocol, Cross-Model Rubber Duck Review, and Portable Sessions
Visual Studio Code 1.135 launches the Agent Host Protocol, an open standard that transforms the editor into a universal runtime for AI agents and allows coding sessions to move seamlessly between applications. The release introduces "Rubber Duck," an experimental feature where complementary models review each other's work, closing 74.7% of the performance gap to flagship models on SWE-Bench Pro. External Agent Sessions now let developers resume work started in other tools, though continuing these sessions typically requires a Copilot subscription. Microsoft has also rolled back the sandboxing rollout for local agents to zero percent as it shifts engineering focus to the new host infrastructure and a new single-pane default layout.
