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-rw-r--r--docs/campaign/CASCADE_ABLATION_PLAN.md6
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@@ -458,3 +458,9 @@ down, -0.0025/1k) | 5e-4 ~0.983 | 1e-3 ~0.990 flat, zero instability. Late-SNR m
confirmed in-training. `--bf_late/--bf_late_at` flags shipped. NEXT-RUN RECIPE (post-epoch): OLMo2 +
Muon + beta_floor 3e-4 + bf_late 1e-3 @ ~20k + kretry 8 — expected to hold cos>=0.99 end-to-end and
likely close the +0.02-0.03 column gap.
+
+### PLAN UPDATE (2026-07-10 17:2x): cos crossed 0.96 (0.9544@39.3k, accelerating) — flagship stays
+UNTOUCHED (the control measuring erosion damage vs BP twins); PARALLEL bf1e3 continuation launched
+from ckpt-40000 on the farm (floor 1e-3 for the remaining 18.8k steps). Endpoint comparison becomes a
+clean quad: EP-control(3e-4) / EP-floor-lift(1e-3 from 40k) / BP-s1 / BP-s2 — quantifies BOTH the
+erosion damage AND the fix's recovery in one shot.