VS Code 1.121 Tightens AI Agent Terminal Controls, Adds Built-In Mermaid Preview

Microsoft is extending Visual Studio Code beyond traditional code editing as AI agents take a larger role in software development. Version 1.132 focuses on giving those agents more precise visual context while keeping voice input on the user’s device. The changes matter because developers can identify a specific web interface element instead of describing it indirectly, potentially narrowing the gap between a requested design change and the underlying code modification.

Microsoft recently released VS Code 1.132 with web-element annotation, allowing developers to mark a component for an AI agent to adjust code and user-interface details more accurately. Built-in dictation now uses the multilingual Nemotron 3.5 model locally, so voice data does not need to be uploaded to the cloud. The update also adds side conversations that can run without disrupting ongoing work, alongside a Markdown diff view for reviewing changes.

Microsoft’s Visual Studio Code continues to integrate generative AI into software development, allowing developers to delegate some coding and editing tasks to AI agents. As agents take on multiple repositories and sessions simultaneously, developers increasingly need a centralized way to monitor progress, review changes and reduce the risk of unintended edits.

Microsoft introduced a preview of Agents Window in VS Code 1.120, providing a separate window for centrally managing Copilot and Claude Agent sessions across multiple projects. The release also adds a changes panel that lets developers track files and code differences modified by agents, review them before applying the changes and maintain greater control over parallel multi-agent workflows.

Visual Studio Code is a Microsoft-led code editor and a key gateway to AI development tools such as GitHub Copilot. As agents take on longer-running tasks involving changes across multiple files, testing and debugging, their ability to retain context, add tools and track execution status has become critical to the practical adoption of AI-assisted development.

Microsoft released the February edition of VS Code 1.110 on March 4, 2026. It introduces experimental agent plugins that can package skills, commands, MCP servers and hooks. Plans created by the Plan agent can be retained in session memory, while context is automatically compacted as it approaches capacity; users can also trigger compaction manually with /compact. The release also adds a preview Agent Debug panel and agent browser tools, allowing AI agents to operate applications and verify the results of their changes.