export interface ExecResult {
    status: number;
    stdout: string;
    stderr: string;
}
/** Injectable exec seam (same DI posture as the merge-queue daemon's deps):
 *  backends never call child_process directly, so tests fake launchctl/systemctl. */
export type Exec = (cmd: string, args: string[]) => ExecResult;
export declare const realExec: Exec;
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