/**
 * MAMA Tier Validator
 *
 * Centralized tier validation module for MAMA.
 * Validates system requirements and determines tier status (1 or 2).
 *
 * Tier 1: Full features (Node.js 22.13+, SQLite, Embeddings, Database)
 * Tier 2: Degraded mode (missing one or more requirements)
 *
 * @module tier-validator
 */
export interface CheckResult {
    status: 'pass' | 'fail';
    details: string;
}
export interface NamedCheckResult extends CheckResult {
    name: string;
}
export interface TierValidation {
    tier: 1 | 2;
    checks: NamedCheckResult[];
}
/**
 * Validates Node.js version requirement
 */
export declare function checkNodeVersion(): CheckResult;
/**
 * Validates SQLite availability (node:sqlite)
 */
export declare function checkSQLite(): CheckResult;
/**
 * Validates embedding model availability
 */
export declare function checkEmbeddings(): CheckResult;
/**
 * Validates database file accessibility
 */
export declare function checkDatabase(): CheckResult;
/**
 * Validates MAMA tier status
 *
 * Performs all system checks and determines tier:
 * - Tier 1: All checks pass (full features)
 * - Tier 2: One or more checks fail (degraded mode)
 */
export declare function validateTier(): Promise<TierValidation>;
/**
 * Get user-friendly tier description
 */
export declare function getTierDescription(tier: number): string;
/**
 * Get tier status banner
 */
export declare function getTierBanner(validation: TierValidation): string;
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