/**
 * Credentials Storage - Global Token Management
 *
 * Stores GitHub OAuth tokens in ~/.miyabi/credentials.json
 * Provides secure token storage and retrieval
 */
export interface Credentials {
    github_token: string;
    created_at: string;
    updated_at: string;
}
/**
 * Save credentials to file
 */
export declare function saveCredentials(token: string): void;
/**
 * Load credentials from file
 */
export declare function loadCredentials(): Credentials | null;
/**
 * Delete credentials file
 */
export declare function deleteCredentials(): void;
/**
 * Get GitHub token from credentials or environment
 */
export declare function getGitHubToken(): string | null;
/**
 * Verify token is valid and has access to repository
 */
export declare function verifyTokenAccess(token: string, owner: string, repo: string): Promise<boolean>;
/**
 * Verify token is valid
 */
export declare function verifyToken(token: string): Promise<boolean>;
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