Marimo VS Code extension – Python notebooks built on LSP and uv
Hi HN! We're excited to release our VS Code/Cursor extension for marimo [1], an open-source, reactive Python notebook. This extension provides a native experience for working with marimo notebooks, a long-requested feature that we’ve worked hard to get right. An LSP-first architecture The core of our extension is a marimo notebook language server (marimo-lsp [2]). As far as we know, it’s the first notebook runtime to take this approach. The Language Server Protocol (LSP) [3] offers a small but important set of notebook-related capabilities that we use for document and kernel syncing;…
Marimo VS Code extension – Python notebooks built on LSP and uv launched on November 19, 2025 with 65 votes, #423 of 9,796 launches that month and more than 95% of that year's launches.
In plain words
The Marimo VS Code extension enables developers to work with marimo, an open-source reactive Python notebook, directly in VS Code and Cursor. Built on a language server protocol architecture, the extension provides native notebook functionality including document and kernel syncing. The LSP-first approach is designed to be extensible, potentially allowing marimo capabilities to be integrated into additional development environments beyond VS Code.
written from the facts on this page · September 2026
From the sources
A language server and VS Code extension for marimo - marimo-team/marimo-lsp
In the maker’s words, at launch
Hi HN! We're excited to release our VS Code/Cursor extension for marimo [1], an open-source, reactive Python notebook. This extension provides a native experience for working with marimo notebooks, a long-requested feature that we’ve worked hard to get right. An LSP-first architecture The core of our extension…
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