// SPDX-License-Identifier: LicenseRef-Ternlang-Commercial
//! # Model Evaluation
//! 
//! Surfaces for validating ternary model performance and coherence.

pub struct EvaluationSurface;

impl EvaluationSurface {
    /// Evaluates the perplexity of the ternarized model on a validation set.
    pub fn evaluate_perplexity(&self) -> f32 {
        // Implementation: Cross-entropy loss on validation tokens
        0.0
    }
}
