SMRTR ProgrammingFeb 8, 2026Daily.dev

Running Pydantic’s Monty Rust sandboxed Python subset in WebAssembly

SMRTR summary

Pydantic released Monty, a fast Python-like sandbox written in Rust that allows safe execution of untrusted code generated by AI agents, with startup times in microseconds. The sandbox supports a limited Python subset and blocks access to filesystem, environment variables, and network resources. Through WebAssembly compilation, Monty runs in browsers as a standalone JavaScript module and as a Pyodide wheel, creating multiple layers of sandboxing for web-based AI applications.

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