Delimiters won’t save you from prompt injection(simonwillison.net)

183 points by eiiot 3 years ago | 75 comments

Understanding ChatGPT Work(simonwillison.net)

281 points by gmays 1 month ago | 149 comments

Claude's new system prompt doesn't want to reproduce song lyrics(simonwillison.net)

52 points by Bluestein 1 month ago | 37 comments

The ChatGPT/Codex app bundles a full copy of LibreOffice(simonwillison.net)

441 points by timpera 1 month ago | 206 comments

Short blog note by Simon Willison finding that the ChatGPT/Codex desktop app ships a 1.7GB runtime with Python, Node.js, Poppler, git and LibreOffice for skills.

Nanochat(simonwillison.net)

26 points by bilsbie 1 year ago | 4 comments

Changes in the system prompt between Claude Opus 4.6 and 4.7(simonwillison.net)

337 points by pretext 6 months ago | 186 comments

Simon Willison's blog post comparing Anthropic's published Claude system prompts for Opus 4.6 and Opus 4.7, using a git diff to highlight the changes.