`codeium` which is now `windsurf` started out as a vscode fork IIRC

Not to be confused with `vscodium` which is an open source build of vscode

you missed the point. Zed develops and pioneers ACP (Agent Client Protocol), which I can also use in other editors and with other agents. at the moment, only Neovim is available as an alternative editor, but nothing stops, say, JetBrains from implementing it. I can plug Codex, Gemini, Claude Code, and Goose directly into my editor of choice.

Codeium started as VS Code extension (after their pivot). The whole Windsurf rebrand fork happened years later