export interface ExecResult {
    stdout: string;
    stderr: string;
    code: number;
}
export type Exec = (cmd: string, args: string[], opts?: {
    env?: NodeJS.ProcessEnv;
    timeout?: number;
}) => Promise<ExecResult>;
/** execFile wrapper that never rejects; missing binary → code 127. */
export declare const realExec: Exec;
/** POSIX single-quote shell escaping. */
export declare const shq: (s: string) => string;