Simon Willison • 2/6/2026

Running Pydantic's Monty Rust sandboxed Python subset in WebAssembly

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This technical article details the process of compiling and running Pydantic's Monty—a Rust-based, sandboxed subset of Python designed for safely executing LLM-generated code—within WebAssembly. It covers the project's goals, its integration with Pyodide, and provides code examples and build instructions for creating browser-compatible demos.

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#Python #rust #Webassembly
Running Pydantic's Monty Rust sandboxed Python subset in WebAssembly

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