VS Code 1.131 released: Agent Host architecture, local offline voice dictation and hybrid Markdown editor

On July 29, 2026, Microsoft released Visual Studio Code 1.131. This version has three highlights worth mentioning separately - they respectively correspond to the editor's evolution in the three directions of "agent-based, voice-based, and document-based".

Highlight 1: Agent Host architecture

1.131 Reconstruct the Agent session into an independent process, implemented based on Agent Host Protocol (AHP). This means that GitHub Copilot, Claude, Codex and other harnesses can all run on a unified Agent Host, and the same session can be connected and rendered by multiple VS Code windows. For developers, the biggest change is that "the Agent session no longer belongs to a certain window" - close the window and the Agent's work continues in an independent process. Copilot Agent is driven by @github/copilot-sdk.

Highlight 2: Built-in voice dictation (experimental)

You can use dictation in chat, the editor, and the terminal without installing the VS Code Speech extension. What's more noteworthy is the way it is implemented: using a private offline Nemotron model, the voice data is retained on the local device - this directly responds to developers' concerns about "whether voice input will leak code to the cloud." The local-first voice capability is a rare bonus in sensitive scenarios such as editors.

Highlight 3: Hybrid Markdown Editor (Experimental)

In the Agents window, you can directly view and edit Markdown in place, and add Agent executable annotations. This may seem like a small change, but in fact it pushes the "document as the agent's collaboration interface" a step forward - the agent can read the instructions in the document and leave executable comments in the document, greatly improving the "writtenness" of human-computer collaboration.

Other noteworthy updates

1.131 also improves the visibility of running neutron agents (you can see their models, runtimes, and tools being called), optimizes the terminal screen reader experience, and makes Python Environments the default environment management experience. This version is gradually being rolled out to all users and is available immediately via "Check for Updates".

From an industry perspective, the Agent Host architecture of VS Code 1.131 has the most profound significance: when the Agent session is independent of the window and can be shared by multiple windows, the editor is shifting from a "tool used by humans" to an "operating system used by humans and Agents". For domestic IDE teams, AHP's "session as process" design idea is worthy of being used as a reference coordinate for the next generation editor architecture.

Several directions worth tracking in the future:

1. Agent Host’s ecological openness: The convenience and stability of third-party harness access.
2. Offline Dictation Accuracy: Recognition quality of native Nemotron models on code terms.
3. The implementation of hybrid Markdown annotations: Will Agent executable annotations become a new collaboration standard.
4. Compatibility with Copilot, Claude, and Codex: Resource isolation and switching experience for multiple harnesses on the same Host.