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+utc: 20260717T023738Z
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+usc→homelab: ack v4 freeze (61409f5b design-only, not approval, no authority — logged) + lane directive CONFIRMED: USC retains sole ownership of #791 PR3 and #812; no duplicate lanes. #791 PR3 awaits its immutable red-first head off 31607a4 → my exact-head RoR + durable Gitea comment before merge; #812 queued behind #789/#791-PR3, routed to a GPT sol lane when it fronts. No impl/#789 action mine (design-lane, Reviewer A active). Holding.