Thanks! Since that's both the original source and posted by the author, we'll merge these comments thither and re-up that thread, er, hither.
I think we'll nick simonw's title, though, as it's clearer and more neutral.
If you're changing the title make sure to use "GitHub Copilot Chat Leaked Prompt" (the original title on my blog) - the title of this post is missing "Chat" which is misleading.