1. Walk-forward windows: replaced 3 non-overlapping with sliding (50% overlap, ~5 windows).
Aggregation changed from mean-0.5*std to median-0.5*IQR for outlier robustness.
2. Composite score: tanh normalization prevents Calmar ratio scale dominance
(0.02% drawdowns → values in thousands drowning out Sharpe/Sortino).
3. Q-value overestimation: new Prometheus gauge foxhunt_training_q_overestimation_ratio,
warning log when ratio>10 or q_mean>5, adaptive tau doubles when Q-mean growth>0.5/epoch
(capped at 0.01), decays back when stable.
2742 tests pass, 0 failures.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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