export interface Version {
    major: number;
    minor: number;
    patch: number;
}
export declare function parseVersion(input: string): Version | null;
export declare function compareVersions(a: Version, b: Version): number;
export declare function isWindows(): boolean;
export declare function homedir(): string;
export declare function cargoBinDir(): string;
export declare function execCommand(command: string): Promise<{
    stdout: string;
    stderr: string;
}>;
export declare function commandExists(command: string): Promise<boolean>;
export declare function prependCargoToPath(): void;
/**
 * Check if sync-ctl is accessible from a fresh login shell.
 *
 * This is critical because the installer's Node.js process may have
 * ~/.cargo/bin in PATH (via prependCargoToPath), but the user's actual
 * shell — and more importantly, the AI agent's shell — may not.
 *
 * A false here means agents will fail with "sync-ctl: command not found"
 * even though the binary is installed.
 */
export declare function isSyncCtlInLoginShell(): Promise<boolean>;
/**
 * Get the user's shell profile file path for PATH modifications.
 */
export declare function getShellProfile(): string;