22nd May 2026
Research
pydantic-monty investigation
— Reviewing `pydantic-monty` reveals it as a fast, minimal Python interpreter designed for controlled sandboxed execution, primarily useful when transforming data, branching, looping, and interacting with a select set of trusted host tools or a virtual filesystem. The interpreter purposefully omits large portions of CPython’s functionality, with clear boundaries: unsupported features and missing resources generally fail cleanly as structured errors rather than escaping into the host runtime.
It's been a few months since I last poked at Monty, the sandboxed subset of Python implemented in Rust. I had Claude Code look at the most recent release.
Importantly the max_duration_secs, max_memory, max_allocations, and max_recursion_depth settings all appear to work as advertised.
Recent articles
- Qwen 3.8 27B is excellent, but it defaults to wildly overthinking things - 16th August 2026
- Now we have a timeline of the OpenAI accidental attack against Hugging Face - 7th August 2026
- One-shotting a Raccoon Heist game using Claude Fable 5 - 5th August 2026