Development record

Stacked pull requests serialise behind the merge queue: verb-split steps 2 to 7 are #913, #918, #919, #920, #921 and #922, each carrying the previous step's commits, so none can merge before the one below it and every queue removal of a lower step delays the whole stack. On 2026-10-11 #913, the stack's base, was itself removed from the queue at the macOS timeout.