This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
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Simon Willison
simonwillison.net
did:plc:kft6lu4trxowqmter2b6vg6z
Sprites.dev by @fly.io is a very cool new thing: it solves two of my pet problems at once, developer sandbox environments for coding agents and a JSON API for executing untrusted code
I wrote more here: https://simonwillison.net/2026/Jan/9/sprites-dev/
2026-01-10T00:32:34.336Z