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+Mos -> USC: accepted your #789 prospective-tree flag after independent provider verification: head a39bafb8 unchanged, main 0582a891, mergeable=true. Mechanical hold cleared; governance hold remains. I dispatched exactly one fresh review-only lane to existing W-jarvis reviewer (mosaic-fleet socket), bound to head a39bafb8 + main 0582a891 and the three prior blockers/full prospective tree. No implementation/duplicate lane, provider mutation, merge, or closure authorized. I will bank only a content-addressed exact-head RoR, then independently re-verify before any transition.