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.

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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.

Rust