/**
 * Model Compatibility Module (SMCP-074)
 *
 * Provides migration detection for embedding model changes.
 * When the embedding model changes between versions, existing indexes
 * need to be rebuilt to use the new model's embeddings.
 *
 * This module checks if the stored model metadata matches the current
 * model configuration and provides helpful error messages when a
 * mismatch is detected.
 */
import type { EmbeddingModelInfo } from '../storage/metadata.js';
/**
 * Result of model compatibility check
 */
export interface ModelCompatibilityResult {
    /** Whether the models are compatible */
    compatible: boolean;
    /** Code model compatibility */
    codeModelMatch: boolean;
    /** Docs model compatibility */
    docsModelMatch: boolean;
    /** Detailed message if incompatible */
    message?: string;
}
/**
 * Model information for display
 */
export interface ModelDisplayInfo {
    codeModelName: string | null;
    codeModelDimension: number | null;
    docsModelName: string | null;
    docsModelDimension: number | null;
}
/**
 * Get the current model configuration
 *
 * @returns Current model configuration used by the application
 */
export declare function getCurrentModelConfig(): ModelDisplayInfo;
/**
 * Check if the stored model metadata is compatible with current models
 *
 * @param storedModels - Embedding model info from index metadata (may be null for legacy indexes)
 * @returns Compatibility result with details
 */
export declare function checkModelCompatibility(storedModels: EmbeddingModelInfo | null | undefined): ModelCompatibilityResult;
/**
 * Check only code model compatibility (for search_code)
 *
 * @param storedModels - Embedding model info from index metadata
 * @returns Compatibility result for code model only
 */
export declare function checkCodeModelCompatibility(storedModels: EmbeddingModelInfo | null | undefined): ModelCompatibilityResult;
/**
 * Check only docs model compatibility (for search_docs)
 *
 * @param storedModels - Embedding model info from index metadata
 * @returns Compatibility result for docs model only
 */
export declare function checkDocsModelCompatibility(storedModels: EmbeddingModelInfo | null | undefined): ModelCompatibilityResult;
/**
 * Build warning message for get_index_status (non-blocking)
 */
export declare function buildStatusWarning(storedModels: EmbeddingModelInfo | null | undefined): string | undefined;
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