--- title: VS Code 1.133 separates AI agents from the editor and... description: VS Code 1.133, released August 12, moves AI agent sessions out of the editor's extension host into a standalone Agent Host process built on a new open-sourced... canonical: https://daily.dev/posts/vs-code-1-133-separates-ai-agents-from-the-editor-and-lets-you-mix-claude-and-copilot-in-one-session-lz5zayoxo twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: VS Code 1.133 separates AI agents from the editor and lets you mix Claude and Copilot in one session | daily.dev og:description: VS Code 1.133, released August 12, moves AI agent sessions out of the editor's extension host into a standalone Agent Host process built on a new open-sourced... og:url: https://daily.dev/posts/vs-code-1-133-separates-ai-agents-from-the-editor-and-lets-you-mix-claude-and-copilot-in-one-session-lz5zayoxo og:image: https://api.daily.dev/og/posts/Lz5ZAyoxo.png og:image:alt: VS Code 1.133 separates AI agents from the editor and lets you mix Claude and Copilot in one session og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # VS Code 1.133 separates AI agents from the editor and lets you mix Claude and Copilot in one session **[Collections](https://daily.dev/sources/collections)** · 2 min read · 1 upvotes · 0 comments ## Summary VS Code 1.133, released August 12, moves AI agent sessions out of the editor's extension host into a standalone Agent Host process built on a new open-sourced (MIT) spec called the Agent Host Protocol (AHP). This lets sessions persist independently, be accessed remotely over SSH or dev tunnels, and stay synced across multiple windows. First-party AHP adapters exist for Copilot, Claude, and Codex, enabling users to mix Anthropic and Copilot providers within a single session and switch turn by turn, with billing following the provider used. A new experimental setting allows the Agents window to open without a forced GitHub sign-in, currently limited to Claude. Smaller additions include auto-reload for local HTML files in the integrated browser and a sticky scroll setting for chat prompts. Old sessions keep working, and the whole feature can be disabled. ## Content Microsoft shipped VS Code 1.133 on August 12, and the headline change is a genuinely structural one: AI agent sessions no longer live inside the editor's extension host. They run in a standalone Agent Host process instead, built on a newly open-sourced spec called the Agent Host Protocol (AHP), released under MIT license. Why does that matter? Because it decouples the session from whatever window or machine happened to start it. Close the folder, switch projects, switch to a different laptop entirely - the session keeps running. You can pick up the same live session from the VS Code agents window, from a browser at vscode.dev/agents, or from a remote machine like a MacBook Air, and actions like queueing a task sync across all of them in real time. Under the hood it's JSON-RPC with immutable state and sequenced updates, so multiple clients watching the same session actually stay in sync rather than fighting over it. Microsoft built first-party adapters for Copilot, Claude, and Codex on top of this. The protocol and spec are still under active development, so expect rough edges. Sessions created before the update keep working under the old model, and if you'd rather not deal with any of this, you can turn the feature off. ## Mixing providers mid-session The other big change: you can now mix Anthropic and Copilot models within a single Claude session, switching providers turn by turn without restarting or reconfiguring the agent host. Billing follows the model - Anthropic calls hit your API key, Copilot calls draw from your Copilot subscription. There's a catch worth flagging. One industry analyst pointed out that per-turn model switching opens a governance gap - nothing currently records which model generated which specific line of code. That's fine until you're debugging a weird regression or trying to pass an audit and need to know whether Claude or a Copilot model wrote the offending function. Worth watching how Microsoft addresses this, because right now the answer seems to be ## Questions this post answers ### What changed in VS Code 1.133 regarding AI agent sessions? AI agent sessions no longer run inside the editor's extension host; they run in a standalone Agent Host process built on the new Agent Host Protocol (AHP), open-sourced under MIT license. This lets sessions persist independently of any editor window, be accessed remotely over SSH or dev tunnels, and stay synced across multiple VS Code windows using JSON-RPC with immutable state and sequenced updates. _Developers rethinking their agentic coding setup can track editor changes like this on daily.dev._ ### Can I use both Claude and GitHub Copilot in the same VS Code chat session? Yes, as of VS Code 1.133 you can mix Anthropic and Copilot providers within a single Claude session and switch between them turn by turn without reconfiguring the agent host. Billing follows whichever provider handled that turn: Anthropic models draw on your API key while Copilot models run against your Copilot subscription. _Teams comparing Claude and Copilot workflows can follow provider-mixing updates like this on daily.dev._ ### How do I open the VS Code Agents window without signing into GitHub first? VS Code 1.133 adds an experimental setting, chat.agentHost.allowSignedOutWhenUsable, which lets the Agents window open without forcing a GitHub sign-in prompt. It currently only works with Claude, though support for Copilot with your own keys and for Codex is planned. _Developers tuning their AI agent setup can keep up with settings like this via daily.dev._ ## Similar posts on daily.dev - [VS Code 1.129 Moves Agent Sessions Out of the Editor Window](https://daily.dev/posts/vs-code-1-129-moves-agent-sessions-out-of-the-editor-window-sba85pvyw) · DevOps.com · 0 upvotes · 0 comments --- Tags: [#github](https://daily.dev/tags/github), [#ai-coding](https://daily.dev/tags/ai-coding), [#vscode](https://daily.dev/tags/vscode), [#claude](https://daily.dev/tags/claude) [View this post on daily.dev](https://daily.dev/posts/vs-code-1-133-separates-ai-agents-from-the-editor-and-lets-you-mix-claude-and-copilot-in-one-session-lz5zayoxo) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"VS Code 1.133 separates AI agents from the editor and lets you mix Claude and Copilot in one session","url":"https://daily.dev/posts/vs-code-1-133-separates-ai-agents-from-the-editor-and-lets-you-mix-claude-and-copilot-in-one-session-lz5zayoxo","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/vs-code-1-133-separates-ai-agents-from-the-editor-and-lets-you-mix-claude-and-copilot-in-one-session-lz5zayoxo"},"datePublished":"2026-08-14T17:25:55.352Z","dateModified":"2026-08-20T18:27:53.556Z","description":"VS Code 1.133, released August 12, moves AI agent sessions out of the editor's extension host into a standalone Agent Host process built on a new open-sourced...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5daf550f18e36750a55b82a5747ac759?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/5daf550f18e36750a55b82a5747ac759?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"Collections","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"Collections","logo":"https://media.daily.dev/image/upload/s--fk_6ycEi--/f_auto,q_auto/v1780996001/logos/collections?_a=BAMAMiWQ0","url":"https://daily.dev/sources/collections"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/vs-code-1-133-separates-ai-agents-from-the-editor-and-lets-you-mix-claude-and-copilot-in-one-session-lz5zayoxo","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":1},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"github,ai-coding,vscode,claude","timeRequired":"PT2M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"Collections","item":"https://daily.dev/sources/collections"},{"@type":"ListItem","position":3,"name":"VS Code 1.133 separates AI agents from the editor and lets you mix Claude and Copilot in one session"}]} {"@context":"https://schema.org","@type":"FAQPage","@id":"https://daily.dev/posts/vs-code-1-133-separates-ai-agents-from-the-editor-and-lets-you-mix-claude-and-copilot-in-one-session-lz5zayoxo#faq","mainEntity":[{"@type":"Question","name":"What changed in VS Code 1.133 regarding AI agent sessions?","acceptedAnswer":{"@type":"Answer","text":"AI agent sessions no longer run inside the editor's extension host; they run in a standalone Agent Host process built on the new Agent Host Protocol (AHP), open-sourced under MIT license. 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