Branch regulators (per-symbol).
action_l2_coeff. Anti-saturation: relu(|a| − threshold)² × coeff.
portfolio_budget_quad_coeff. Quadratic penalty for gross exposure exceeding the limit.
inaction_penalty_coeff. Anti-zero-policy.
action_diversity_coeff. Anti-symbol-collapse via std(actions, dim=symbols).
direction_inbalance_coeff. Anti-mono-direction — penalty when |batch_mean(actions)| exceeds threshold.
q_crossing_coeff. Penalty for monotonicity violations of the per-sym quantile distribution (numerical stability).
New v2.4 knobs.
actor_mini_mixer_layers / heads / ffn_mult — capacity of the actor cross-symbol mixer.
v_global_layers / heads / pool_query_dim — capacity of the V_global Transformer observer.
v_global_loss_coeff — weight of the V_global TD term in the total critic objective.
Deprecated / removed.
encoder_grad_source — superseded by the v2.3 separate-encoder split (always td_only on its own path).
actor_head_arch — only the linear variant remains; ResidualSkipHead has been removed.
regime_adapter_* — actor_adapter was removed entirely.