Single GPU-resident scalar: CV = sigma_adv / |mean_adv|.
When CV > 1 (noisy advantages), readiness < 1 → features suppressed.
When CV ≤ 1 (stable advantages), readiness = 1 → features fully active.
All 5 IQL downstream kernels blend toward neutral defaults at readiness=0:
- Per-sample C51 support: blends to [-1, 1] default
- PER modulation: blends to td_errors unmodified
- Branch scales: blends to uniform 0.25
- Advantage weights: blends to neutral 1.0
- Expectile gap epsilon: gap scaled by readiness
Zero new hyperparameters. Computed from existing adv_stats_buf.
Best Sharpe improved 11.39 → 14.23 on 10-epoch stability test.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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