Post

In a horrifying abuse of modern computers, here's a shell one-liner you can run on macOS to calculate the number of days between two dates in the most complex way imaginable - using uv and Deno and the Pydantic AI Python sandbox MCP server simonwillison.net/2025/Apr/18/...

... and a version that works entirely locally using Mistral Small 3.1 run via Ollama gist.github.com/simonw/e444a...

Ask for estimated milliseconds between the murder of Julius Ceaser and when Buzz Aldrin followed Neil Armstrong onto the moon, accounting for leap days, calendar changes, and general relativity.