/**
 * Template statistics and CloudFormation limit checks (Phase 1 of #90)
 *
 * CloudFormation hard limits:
 * - 500 resources per stack
 * - 200 outputs per stack
 * - 1MB (1,048,576 bytes) template body size
 *
 * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html
 */
export interface TemplateStats {
    resourceCount: number;
    resourceLimit: number;
    resourcePercent: number;
    outputCount: number;
    outputLimit: number;
    outputPercent: number;
    templateBytes: number;
    templateLimit: number;
    templatePercent: number;
    resourceTypes: Record<string, number>;
}
export interface StatsWarning {
    message: string;
    current: number;
    limit: number;
    percent: number;
}
/**
 * CloudFormation service quotas — individual constants for true immutability.
 * @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html
 */
/** @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html - "Resources" */
export declare const CFN_RESOURCE_LIMIT: 500;
/** @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html - "Outputs" */
export declare const CFN_OUTPUT_LIMIT: 200;
/** @see https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/cloudformation-limits.html - "Template body size" */
export declare const CFN_TEMPLATE_BYTES_LIMIT: 1048576;
export declare const CFN_LIMITS: {
    readonly resources: 500;
    readonly outputs: 200;
    readonly templateBytes: 1048576;
};
/** Warn when usage reaches this fraction of the CloudFormation limit. */
export declare const WARNING_THRESHOLD: 0.8;
/**
 * Compute statistics for a resolved CloudFormation template.
 */
export declare function computeStats(template: any, serialized?: string): TemplateStats;
/**
 * Check stats against 80% warning thresholds. Returns warnings (if any).
 */
export declare function checkThresholds(stats: TemplateStats): StatsWarning[];
/**
 * Format stats as a human-readable report string.
 */
export declare function formatStatsReport(stats: TemplateStats): string;
//# sourceMappingURL=stats.d.ts.map