PyBun

PyBun is a Rust-built, single-binary toolchain for Python. It delivers fast installs, lazy-import runtime, hot reload, a built-in test runner, builder, and MCP server with JSON-first output for AI agents. Targets 10x faster startup, reproducible lock installs, sandboxed execution, and shared caching. macOS/Linux first, Windows follows.

{
  "mcpServers": {
    "pybun": {
      "command": "cargo",
      "args": [
        "run",
        "--",
        "PyBun"
      ]
    }
  }
}

claude mcp add pybun cargo run -- PyBun

{
  "mcpServers": {
    "pybun": {
      "command": "cargo",
      "args": [
        "run",
        "--",
        "PyBun"
      ]
    }
  }
}