VS Code 1.129 Ships a Floating Panel UI — Here's How to Turn It On

by Geth Author

If you have been staring at Visual Studio Code's flat, edge-to-edge sidebars for years, the July 2026 release has something worth your attention. VS Code 1.129, shipped July 15 with a servicing patch (1.129.1) on July 17, introduces a "Modern UI" experiment that separates the Activity Bar, sidebars, editor area, and bottom panel into floating card-style sections — each with rounded corners, subtle gaps, and softer borders.

The change is purely visual, but it addresses one of the more persistent complaints about VS Code's default look: everything bleeds into everything else, and at certain color themes the boundaries between the Explorer panel, the terminal, and the editor group are nearly invisible.

To enable it, open Settings, search for "modern", and toggle Workbench > Experimental: Modern UI (workbench.experimental.modernUI). The Linuxiac write-up has a before-and-after screenshot that makes the difference immediately obvious. VS Code Insiders builds get the feature on by default; the stable channel requires the manual toggle.

Beyond the aesthetic shift, 1.129 also ships an Agent Host framework — a scaffolding layer for extensions that want to define their own agentic tool-use loops inside the editor. This is the infrastructure play Microsoft has been telegraphing: Copilot is no longer the only agent in VS Code, and third-party extensions can now hook into the same multi-step reasoning primitives.

The release also brings new diff configuration options, better Jupyter notebook rendering parity inside the editor, and a round of accessibility fixes for screen readers.

What is not yet clear is whether the Modern UI will graduate from experiment to default in a future release, or remain a power-user option. Microsoft historically runs these visual experiments for several release cycles before committing. Given that the company also previewed a similar floating-panel aesthetic in Visual Studio 2026, the direction of travel looks consistent.

The update is free — get it through Help > Check for Updates in the stable build, or pull 1.129.1 directly from code.visualstudio.com.