Developer open-sources Demi, a self-hosted agent platform that runs in the browser

On November 3, 2026 at 11:48, developer wspl posted on V2EX about Demi, a self-hosted, open-source Agent platform, sharing the repository at https://github.com/wspl/demi and the website at https://demi.sh . Demi is built with Rust and Web technology and runs in the browser, positioned as an open-source alternative to products like ChatGPT + Codex or Claude + Claude Code, with interaction design that draws heavily on Cursor. Its capabilities span chat, development, image generation, and ops work. To set it up, a user installs the full Demi product on a server such as a VPS, then either enters an API Key or signs in with an existing Claude / ChatGPT subscription. After that, installing Demi Runner on any computer or server the user wants to be operated on lets the Agent work on that machine remotely. The developer explains that they had long enjoyed Cursor, but after Opus 4.6 the API-based pricing became too expensive, so they moved to Claude Code along with the crowd. At the time most options were TUI-based, which made for a painful experience, so they built a Mac client inspired by Conductor that ended up looking very much like Codex; Demi grew out of that work. The available material covers only this initial announcement, so no follow-up developments or current status are reported yet.