import type { VelocityProfile } from '../../types/velocity.js';
/**
 * Compute a VelocityProfile from recent done specs with actuals.
 * Gracefully returns a low-confidence default when data is insufficient.
 * SPEC-555
 */
export declare function measureVelocity(projectPath: string, windowDays?: number): Promise<VelocityProfile>;
/**
 * Convert estimated devHours to calendar days using a VelocityProfile.
 * Returns 1 decimal place.
 * SPEC-555
 */
export declare function devHoursToCalendarDays(hours: number, profile: VelocityProfile): number;
/**
 * Format a human-readable calendar estimate string.
 * Example: "~0.5 days at your velocity (9.0 SPECs/day, high confidence)"
 * SPEC-555
 */
export declare function formatCalendarEstimate(hours: number, profile: VelocityProfile): string;
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