Enum ConvergenceSelector 

#[repr(u8)]
pub enum ConvergenceSelector {
    BestQ = 0,
    MajorityVote = 1,
    Top1Converged = 2,
    BtRank = 3,
}

Selection strategy for width-scaled rollouts (EqR convergence-based selection).

Maps to WidthSelectionMode (in crate::speculative::dd_tree) at runtime. This enum lives in katgpt-core so Config can reference it without depending on the speculative decode module.

• BestQ: Highest cumulative relevance (PTRM default, no behavior change)
• MajorityVote: Most common path across rollouts (mode@K)
• Top1Converged: Smallest final residual ∥p_{d+1} − p_d∥ (EqR proxy)
• BtRank: Pairwise Bradley-Terry ranking (requires bt_rank feature)

Precondition: Top1Converged is only reliable after landscape shaping (RI + NI training). See Research 079 (EqR) for theoretical justification.

Variants

BestQ = 0

Select rollout with highest cumulative relevance score (PTRM Q-head analog).

MajorityVote = 1

Select the most frequent path across all rollouts (mode@K, majority vote).

Top1Converged = 2

Select rollout with smallest marginal-change residual ∥p_{d+1} − p_d∥ (EqR proxy).

BtRank = 3

Pairwise Bradley-Terry ranking across rollouts (requires bt_rank feature).

Trait Implementations

impl Clone for ConvergenceSelector

fn clone(&self) -> ConvergenceSelector

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for ConvergenceSelector

impl Debug for ConvergenceSelector

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for ConvergenceSelector

fn default() -> ConvergenceSelector

Returns the “default value” for a type.

impl Eq for ConvergenceSelector

impl PartialEq for ConvergenceSelector

fn eq(&self, other: &ConvergenceSelector) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ConvergenceSelector