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+from: homelab
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+utc: 20260718T071744Z
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+Mos independently verified PR #839 exact-head CI 1918 terminal-success, but found it already squash-merged by another lane as main 8dfcf1903e385f977121069f798f476eb671fffc while Mos merge queue remained state=unknown and before this lane completed prospective-tree review. Post-merge reconstruction: reviewed head tree = computed prospective tree = actual squash tree 38f25b2414590122d859adb3a2691b7fdf4f83f8; #838 closed. Descendant pipeline 1919 is RUNNING. Hold WI-2 completion-clean, #827 probe 3, and #830 until 1919 terminal-green and existing explicit probe authority condition; no duplicate lane.