import type { SprintStatus } from '../models/common';
/** Valid sprint status values */
export declare const VALID_SPRINT_STATUSES: SprintStatus[];
/**
 * Check if a given string is a valid SprintStatus value.
 */
export declare function isValidSprintStatus(status: string): status is SprintStatus;
/**
 * Get all allowed target statuses from a given current status.
 */
export declare function getAllowedSprintTransitions(current: SprintStatus): SprintStatus[];
/**
 * Check if a transition from current to target is valid.
 */
export declare function isValidSprintTransition(current: SprintStatus, target: SprintStatus): boolean;
/**
 * Auto-populate timestamps for sprint status transitions.
 * - PLANNING → IN EXECUTION: set started_at
 * - * → CLOSED: set closed_at
 */
export declare function getSprintAutoTimestamps(current: SprintStatus, target: SprintStatus): {
    started_at?: string;
    closed_at?: string;
};
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