RESULT 60: s345000走廊空(end075更糟3.4805,LR嫌疑排除)→闭合点275-300k,s250000=最后健康点; --res_gate宽度可配+bsign×beta_simple符号抹除bug修复(COMBO_CERT_PASS); fw135m_ratchet从s250000发射(bsign+棘轮+res_gate 1e-3,27h)

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

1 files changed, 22 insertions, 0 deletions

diff --git a/docs/campaign/CASCADE_ABLATION_PLAN.md b/docs/campaign/CASCADE_ABLATION_PLAN.md
index a0c8efb..5bb1d73 100644
--- a/docs/campaign/CASCADE_ABLATION_PLAN.md
+++ b/docs/campaign/CASCADE_ABLATION_PLAN.md
@@ -568,6 +568,28 @@ direction), not training-under-fault; wave-2 = co-training with faults injected
 
 
 
+### RESULT 60 (2026-07-24): s345000 CORRIDOR IS EMPTY (end075 3.4805 < original, worse);
+closure located at ~275-300k; CONTINUATION = bsign+ratchet+res_gate from s250000. Two code
+fixes en route (sign-wipe combo bug + configurable gate), both fire-certified.
+end075 (beta 7.5e-4 from s345000): best 3.4805, val climbing to 3.9, gn doubled — LOWER beta
+did WORSE than the original 3e-3 over the same segment. LR-scheduler suspect CLEARED (resume
+fast-forward exists, line 813). Diagnosis: at s345000 the corridor is EMPTY — ceiling ~1e-3
+(contraction) while the state's elevated relax-noise floor (resK stuck 2.6e-4 at ALL beta,
+100x above healthy) pushes the effective lower bound UP past it. Over-ceiling operation bakes
+in state damage (the 72M simple-lineage lesson, width edition).
+CLOSURE PROBE (resK-to-floor reading, rho-noise verdicts discounted): s250000 CLEAN at 3e-3
+(resK 1.3e-6, ceiling ~5e-3) | s300000 boundary (3e-3 resK 2.2e-5) | s345000 dead. Crossing
+~275-300k. Last healthy resume point = s250000.
+FIXES: (1) --res_gate flag (0.02 was a C512 constant; C768 ran 100k steps semi-converged under
+it; per-width rule ~100x healthy K=3 floor -> 1e-3 for C768); (2) bsign+beta_simple SIGN-WIPE
+bug — the beta_simple override sat after the sign flip and silently disabled bsign when both
+were on (never manifested: 72M ratchet ran plain). Flip moved after the override.
+COMBO_CERT_PASS: forced-knock smoke shows sign flips + knocks + persistent halving together.
+IN FLIGHT: fw135m_ratchet — resume s250000, bsign + halve-only ratchet + res_gate 1e-3,
+beta0 3e-3, 3-GPU, 190k-step replay (~27h). Expected: knocks track the sinking ceiling
+(~290k, ~1.5-2e-3, endgame ~1e-3), anneal harvested inside the corridor. Verdict = best vs
+3.3839 (bsign fixed-3e-3) and vs 72M band 3.364.
+
 ### 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.