Single-block single-thread ISV producer mirrors h_s2_rms_ema /
moe_lambda_eff pattern. Computes per-epoch
drift_rate = |q_mean(t) - q_mean(t-1)| /
max(|q_mean(t-1)|, ISV[Q_ABS_REF] + ISV[Q_DIR_ABS_REF], 1e-6)
clipped to [0, 4] and writes to ISV[Q_DRIFT_RATE_INDEX=129].
Includes the full ISV-contract shift required for the kernel to load:
- ISV_TOTAL_DIM 129 -> 130
- Q_DRIFT_RATE_INDEX = 129 (tail-appended after MOE_LAMBDA_EFF=128)
- Cold-start ISV[129] = 0.0 in constructor (no-op dampening factor)
- layout_fingerprint_seed entry Q_DRIFT_RATE=129 + ISV_TOTAL_DIM=130
- Cubin static, kernel field, kernel load, struct assignment
Per feedback_no_partial_refactor.md the ISV slot + dim + fingerprint
all migrate together (the wrapper references Q_DRIFT_RATE_INDEX so they
cannot be split). Tau consumer + state reset registry + per-epoch
producer launch land in the next commit.
Audit doc dqn-wire-up-audit.md updated with the kernel + ISV slot
description per Invariant 7.
No callers in this commit; layout fingerprint shifts so existing
checkpoints will fail-fast at load per feedback_no_legacy_aliases.md
(expected for a real architecture change).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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