Per spec §9.2 (3.5.4) post-amendment-2 fix. TWO-STEP recovery:
1. Fire when DD_PERSISTENCE > PLASTICITY_PERSISTENCE_THRESHOLD AND
PLASTICITY_FIRED_THIS_FOLD == 0 → set fired flag, set warm-bars
counter to M_warm (default 200). [DEFERRED: reset last 10% of
advantage-head weights to Kaiming-He init via cuRAND.]
2. Per-bar warm-bars decrement; action-selection layer (consumer wiring
follow-up) reads max(COOLDOWN_BARS_REMAINING, PLASTICITY_WARM_BARS_
REMAINING) and forces Hold while > 0.
Weight-reset DEFERRED to Phase 3.5.4.b — kernel signature plumbed
(advantage_head_weights + n_weights) but no-op via (void) cast.
Documented in audit doc.
3 ISV slots: 436 PLASTICITY_FIRED_THIS_FOLD (debounce flag, resets at
fold boundary to re-arm next fold), 437 PLASTICITY_PERSISTENCE_THRESHOLD
(initial 100.0 sentinel; ISV-tracked from running mean of dd_persistence
in follow-up), 438 PLASTICITY_WARM_BARS_REMAINING (counter, OR-gates
with cooldown).
3 fold-reset registry entries + dispatch arms.
Three GPU oracle tests pass: fires-when-persistence-exceeds-threshold
(warm_bars [198, 200] post-fire-and-decrement), debounced-within-fold
(no re-fire when fired=1; warm decrements 50→49), no-fire-below-threshold.
Anchor test 2.22 plasticity_cooldown_interlock (Phase 2C / Phase 3.5
paired) — green via 3.5.4.b follow-up + action-selection consumer wiring.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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