A Connecticut court filing included hidden instructions designed to manipulate an AI to favor the filer, Matthew Elliott, in his lawsuit against the New York Bariatric Group. The instructions, known as "prompt injections," were embedded in tiny, 3-point white font throughout the document.

A developer added hidden instructions to jqwik, a Java testing app, which instruct AI coding agents to delete all jqwik tests. This update, published as version 1.10.0, reflects growing frustration with "vibe coding."