/**
 * v2.15.0 follow-up — G10: complexity estimator.
 *
 * 12 Gaps memory: the G2 complexity tier drives user-attended vs overnight
 * scheduling. This service estimates the complexity of a set of files
 * based on LOC + a few cheap heuristics.
 *
 * Tier thresholds (G2 12 Gaps memory):
 *   - trivial : ≤ 50 lines, no async, no IO
 *   - simple  : ≤ 200 lines, ≤ 3 exports
 *   - complex : > 200 lines, OR many exports, OR has async/await
 *
 * Pure function. CLI: `peaks complexity estimate --files <list>`.
 */
export type ComplexityTier = 'trivial' | 'simple' | 'complex';
export interface FileComplexity {
    readonly file: string;
    readonly lines: number;
    readonly exports: number;
    readonly hasAsync: boolean;
    readonly tier: ComplexityTier;
}
export interface ComplexityEstimate {
    readonly files: readonly FileComplexity[];
    readonly overall: ComplexityTier;
    readonly summary: {
        trivial: number;
        simple: number;
        complex: number;
    };
}
export declare function estimateFileComplexity(file: string): FileComplexity | null;
export declare function aggregateTier(tiers: readonly ComplexityTier[]): ComplexityTier;
export declare function estimateComplexity(projectRoot: string, files: readonly string[]): ComplexityEstimate;