Search trace for K2-Horizon-7B-Uno-heretic. One point per Optuna trial. Targets: refusal rate and KL divergence, lower is better on both. The third axis, colour and the parameter strip show the six searched parameters.
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Objective plane KL × refusal
Trial
Parameters → outcomes drag on an axis to brush
Spearman ρ n = 100
|ρ| ≳ 0.2 ≈ p < 0.05, uncorrected. Marginal association; parameters were sampled jointly.