RESULT 59b: C768天花板实测8-12e-3@150k→1e-3@345k — 后半程超顶2-3×运行(非擦边),bsign下天花板照沉(锐化自驱,宽度新物理); res>0.02告警常数也不跨宽度; end15换end075(β=7.5e-4)重放

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014FAPDWQ49M5Ye3NpTndTpn

1 files changed, 17 insertions, 0 deletions

diff --git a/docs/campaign/CASCADE_ABLATION_PLAN.md b/docs/campaign/CASCADE_ABLATION_PLAN.md
index 04bade5..a0c8efb 100644
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+++ b/docs/campaign/CASCADE_ABLATION_PLAN.md
@@ -568,6 +568,23 @@ direction), not training-under-fault; wave-2 = co-training with faults injected
 
 
 
+### RESULT 59b (2026-07-24): C768 CEILING MEASURED — the run spent its second half 2-3x
+ABOVE the ceiling, and the ceiling sinks UNDER BSIGN at this width. R59's "graze" and "stability
+transfers" both CORRECTED.
+rho-grid @C768 (fine grid 0.5-20e-3, K=30): ceiling beta* = 8-12e-3 @s150000 (3e-3 healthy,
+4x margin) -> ~1e-3 @s345000 (3e-3 = 3x OVER; 1.5e-3 diverges, resK 1.1e-2) -> 1-1.5e-3
+@s435000. So: (1) not a graze — sustained over-ceiling operation, fail-soft only because bsign
+cut the bias feedback and guards were silent (plain_nf regime: no explosion, no learning);
+(2) the ceiling sinks even with bsign at C768 — sharpening itself (sigma 569->661) drives it;
+72M's "debiasing removes the sink" narrows to "removes the BIAS-driven component" — width adds
+a second, bias-independent sinking term. NEW LADDER PHYSICS: ceiling scale drops with width
+(~1/sigma^2); at 270M+ even 1e-3 may cross mid-run -> the recipe needs per-stage beta
+descent gated by measured ceilings (the ratchet/descent axis returns, this time with the
+instrument to calibrate it). Also non-transferring: the res>0.02 legality constant (C768 ran
+half its schedule at res~1e-2, under the alarm line, while the harvest died).
+end15 (beta 1.5e-3) KILLED pre-data (measured above-ceiling at the resume state);
+fw135m_end075 relaunched: s345000, beta=7.5e-4 (below both late readings), final 95k replay.
+
 ### RESULT 59 (2026-07-24): FW135M COMPLETED 3.3839 — stability TRANSFERS (zero events,
 440k, bsign), but the OPERATING POINT does not: beta=3e-3 grazed the C768 ceiling through the
 endgame and the anneal harvest was lost. Scaling verdict DEFERRED pending the beta-fix replay.