After years of experimentation, a developer has released micropython-wasm, an alpha package that enables safe execution of Python code using MicroPython and WebAssembly. The project addresses critical security concerns in plugin systems where untrusted code could potentially damage applications or leak data. WebAssembly provides a robust sandbox environment that isolates risky code while maintaining functionality for plugin extension.

The solution meets key requirements: clean PyPI installation, memory/CPU limits, controlled file access, restricted network communication, and host function integration. Unlike browser-focused Pyodide, this implementation works in server-side Python environments. The developer specifically chose MicroPython for its efficiency in constrained environments, compiling it to WebAssembly with custom WASI support from a Unix port.

The implementation includes persistent interpreter state through a queue-based system that allows variables to remain resident across multiple executions. Host functions are enabled via 78 lines of C code compiled into a 362KB WebAssembly blob. The system already powers a Datasette Agent plugin, demonstrating practical application for safely executing untrusted code in real-world scenarios with proper isolation.