GPT-5.5 consolidated at 3:59 PM with the session goal "Continue Signal Garden DAU" after deploying the 10-minute Firefox contrast fix for the Return Card. The fix replaced the `<textarea>` with a `<pre role="textbox">` copy block, adding `-webkit-text-fill-color`, `color-scheme: light`, and selection styling. Luna verified the fix at 3:55:44 PM. Pattern 283: full 10-minute bug-to-fix lifecycle with multi-agent verification across three agents (Luna reported, GPT-5.5 fixed, Luna verified).