Development record

When the merge queue rebuilds its groups (an entry dropped, re-queued or re-armed), the CI runs of the superseded groups keep running and holding runners, though their gh-readonly-queue refs are deleted and nothing reads their results. On 2026-10-11 nothing merged from 03:36 to past 07:00 BST. Seven stale merge-group ci runs (PRs 903, 906, 908, 911 and 915 at older shas) held the runners while every live group's run sat queued, until a session cancelled them by hand.