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
- 2026 in LLMs (so far) - 27th September 2026
- Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war - 22nd September 2026
- Jev introduces a new shape of LLM - System One, aka Decision Models - 21st September 2026