Introduction

What Open Free Max is, who it's for, and how it stays light, durable and on your subscription.

Open Free Max (OFM) is a fast, native desktop IDE that drives the official coding-agent CLIs — Claude Code, Codex, Antigravity, Cursor Agent, OpenCode, Vibe and Kimi Code — interactively, from a single window, on the subscription you already pay for.

It is deliberately thin. There is no bundled Chromium and no VS Code extension host: OFM is built on Tauri, so it uses your operating system’s own WebView plus a small native Rust core. In practice that means up to 50× less RAM than Electron-based IDEs, even with several agents running at once.

What problem does it solve?

Agent CLIs are powerful but you end up juggling terminals: one window per agent, per project, losing track of what’s running, and re-typing the same approvals. OFM gives what the CLIs alone don’t:

  • A real IDE — file tree, editor, terminal, and a first-class screenshot workflow.
  • Mission Control — supervise every running agent on one screen, across projects and providers.
  • Local knowledge and Obsidian — an Obsidian-like project knowledge base stored on your machine, plus optional direct access to the live vault open in Obsidian through MCP.
  • Recurring work — scheduled jobs that wake an agent, have it run a checklist, and report only when there is something to report.

Three principles

  1. On your subscription, never your API bill. OFM only ever runs the official CLI in interactive mode and refuses every programmatic path (SDK, headless -p, ACP). See Subscription vs API.
  2. Your conversations can’t be lost. OFM never owns the transcript store — it leans on each CLI’s own durable history and rebuilds its session map from disk if needed. See Session persistence.
  3. Thin and native. A small Rust shell over the official binaries — fast to launch, light on memory, honest about what it does.
  4. Knowledge stays local. OFM’s native notes, facts and links live in your local project database. An external Obsidian vault remains a separate source and is accessed only through its localhost MCP connection.

Who is it for?

Developers and teams who already pay for one or more agent subscriptions and want to run them seriously — in parallel, across projects — without an Electron behemoth, a metered API surprise, or a lost conversation.

Next steps

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Install