Simon Willison’s Weblog

PyCon 2005 photos. I’ve started uploading to Flickr.

Posted 23rd March 2005 at 6:06 pm

Recent articles

The lethal trifecta for AI agents: private data, untrusted content, and external communication - 16th June 2025
An Introduction to Google’s Approach to AI Agent Security - 15th June 2025
Design Patterns for Securing LLM Agents against Prompt Injections - 13th June 2025

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