Phase 2 only ever proved convergence after the network was fully healed, so a protocol that converges on a perfect wire but livelocks under sustained loss would have passed. A new degraded phase holds a fixed, never-healed drop and duplication rate on both links and drives a fresh session through the same safety, convergence and termination oracles, within a window scaled to the loss rate: a round makes progress only if both its request and reply arrive, so the expected round count grows as one over the delivered-fraction squared, times a safety factor, with the derivation in a recomputable comment. It converges with wide margin -- across many seeds the worst run finished in a small fraction of the window at every rate tested -- so there is no livelock. Pinning the window below the real need trips the oracle, so the check is not vacuous. The gate runs one modest rate; the soak sweeps a range. check-in: b8ef4a68e5 user: dmestas tags: trunk