/**
 * Effort Estimation
 *
 * Pure function to estimate effort level from raw signals.
 * Score-based: each signal contributes points, thresholds map to effort levels.
 */
import type { Effort, EffortSignals, EffortWeights } from './types.js';
/**
 * Default weights for effort estimation.
 */
export declare const DEFAULT_WEIGHTS: EffortWeights;
/**
 * Ordered effort levels for ordinal comparison.
 * Index 0 = lowest, index 4 = highest.
 */
export declare const EFFORT_ORDER: readonly Effort[];
/**
 * Estimate effort level from raw signals.
 *
 * Score formula:
 *   fileCount * fileCountMultiplier
 *   + min(linesChanged / linesPerPoint, 10)
 *   + toolCallCount * toolCallWeight
 *   + (durationMs / 60000) / minutesPerPoint
 *   + complexity bonuses: newFiles(+5), multiLang(+3), tests(+5), config(+2)
 *
 * Thresholds:
 *   < 5 = trivial, < 15 = low, < 40 = medium, < 100 = high, else = significant
 */
export declare function estimateEffort(signals: EffortSignals, weights?: Partial<EffortWeights>): Effort;