/**
 * Feature extraction from Terraform plan data for the classifier.
 *
 * Converts variable resource attributes into a fixed-size feature vector
 * that captures the "safety-relevant" patterns across all resource types.
 */
import type { ResourceChange, TerraformState } from '../resources/types.js';
import { ClassifierFeatures } from './decision-tree.js';
/**
 * Extract features from a Terraform resource change.
 */
export declare function extractFeatures(change: ResourceChange, state: TerraformState | null): ClassifierFeatures;
/**
 * Get feature explanations for debugging/tracing.
 */
export declare function explainFeatures(features: ClassifierFeatures): string[];
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