diff options
| -rw-r--r-- | docs/campaign/CASCADE_ABLATION_PLAN.md | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/docs/campaign/CASCADE_ABLATION_PLAN.md b/docs/campaign/CASCADE_ABLATION_PLAN.md index 6c38ce1..e6c10ad 100644 --- a/docs/campaign/CASCADE_ABLATION_PLAN.md +++ b/docs/campaign/CASCADE_ABLATION_PLAN.md @@ -568,6 +568,29 @@ direction), not training-under-fault; wave-2 = co-training with faults injected +### RESULT 37 (2026-07-17): RIDE FAILS AT 72M — weight poisoning via permissive guards during beta surfing; crown-3 relaunched as PLAIN from the clean ckpt. +Timeline (fw72m_ride): healthy surf to ~48k; at 72M the governor never found the 42M-style smooth +hover — beta banged between 1.5e-4 and 1.85e-2 (rho-hat is noisy/laggy at this scale). ~54k: +first skip jolt (4->17). By 60k beta was PINNED at the cap floor (1.5e-4) yet nearly every step +drift-rejected at K=8 — relaxation diverging at 20x smaller beta than had been stable for 50k +steps => the WEIGHT STATE itself was sharpened/poisoned, not a beta-level wall. Mechanism: at +big beta, displacement (and any semi-diverged garbage) scales with beta, but the drift-accept +threshold (0.5) is beta-INDEPENDENT — near-threshold accepts during 1e-2-scale surfing carry +beta-scaled damage into the weights. 42M never showed this because its window is so wide the +excursions stayed benign. CE never recovered (val 3.77 -> 4.0-4.2, best frozen 3.5797); training +deadlocked (governor cannot cure a state disease by lowering beta). +INTERVENTION: killed at ~75k; relaunched as fw72m_plain from the last clean ckpt (s50000, +skips=3 era): plain estimator, FIXED bf_late 3e-3@0, bcap 0.9 defensive-only (ride=1.0). +Resume health: val 3.7354, zero skips, cos 0.9965. ETA ~15h. +LESSONS (ride-v2 design, to be tuned on cheap probes, NEVER on crown runs): +(a) beta-scaled accept threshold (drift_max ~ f(beta)) or update-norm clip during high-beta; +(b) climb hysteresis: after any wall contact, cooldown + re-climb at a fraction of the last + stable beta (no immediate re-surf); +(c) rho-hat smoothing (EMA) before governor decisions — the raw per-step meter is too noisy at + 72M; (d) hard beta_ride headroom set from the last-known stable beta, not a fixed 30x. +Status: ride stays VALIDATED at 42M (RESULT 35); at 72M it is a failed-first-attempt with a +diagnosed mechanism — an honest boundary datum for the governor line, not a retraction of it. + ### RESULT 36 (2026-07-17): PRE-REGISTRATION — ride seed campaign + fw72m_ride crown-3 + the BP-fairness note. User call: "多跑几条 ride, 在 72M 跑 ride — 说不定真比 BP 好, 因为我们没扫 BP 的最佳 setting." Launched: |