Simon Willison’s Weblog

Rack. “Rack provides an minimal interface between webservers supporting Ruby and Ruby frameworks”. Ruby’s equivalent of WSGI has just hit v0.1.

Posted 4th March 2007 at 8:49 pm

Recent articles

JustHTML is a fascinating example of vibe engineering in action - 14th December 2025
OpenAI are quietly adopting skills, now available in ChatGPT and Codex CLI - 12th December 2025
GPT-5.2 - 11th December 2025

rack 2 ruby 72 wsgi 28

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe