Once main requires mesh/check, nothing writes mesh/merge-gate, and the merge
tool, which judged on it, would refuse every merge. It now judges on the
status the base requires: mesh/check's line names the trunk it judged, an
out-of-date one is refused and nothing is asked (the checker re-checks on a
trunk move, ADR 0447 §4); hq's mesh/repo-check is judged as before. The
announcer, the verdict, a trunk's move and a build's start write the
controller's two statuses only where a base still requires them, so hq keeps
mesh/repo-check and no stale mesh/merge-gate appears anywhere else.
jschoubben
c41c968086