BitFun

BitFun is a desktop-grade Agent runtime (Local Agent Runtime) and a ready-to-use suite of desktop Agent applications.

It is the foundation—a Rust core plus a Tauri shell, with sessions, tools, memory, MCP, LSP, and remote-control protocols built in, designed for long-running use;

You can use it immediately, or define your own domain Agents on top of it.

Download and run—no DIY assembly: MCP / LSP / filesystem / terminal / Git / remote SSH are all built in; configure your model and go, without spending time wiring the protocol stack from scratch.

Deeply customizable, with no gap from a single Markdown file to a full-repo fork: ~90% of domain needs are covered with one .md; missing a tool?

Have the Code Agent do it inside BitFun—the way you customize it is by using it.

The Agent works on the desktop; you check progress on the go.

Self-improving: 97%+ of the code was produced by BitFun’s built-in Code Agent via Vibe Coding, so it naturally fits AI-assisted development.