/**
 * @fileoverview Abortable command execution for fitness checks
 *
 * Provides shell command execution with abort signal and timeout support.
 * Child processes are properly cleaned up on abort.
 */
/**
 * Options for abortable command execution
 */
export interface AbortableExecOptions {
    cwd?: string | undefined;
    signal?: AbortSignal | undefined;
    maxBuffer?: number | undefined;
    env?: NodeJS.ProcessEnv | undefined;
    timeout?: number | undefined;
}
/**
 * Result of command execution
 */
export interface ExecResult {
    stdout: string;
    stderr: string;
    exitCode: number | null;
    aborted: boolean;
}
/**
 * Execute a command with abort support.
 *
 * @param command - Either a shell command string or an array of [bin, ...args] (no shell).
 * @throws {SystemError} When the command array is empty
 * @throws {ExecError} When the child process fails to spawn
 */
export declare function execAbortable(command: string | readonly string[], options?: AbortableExecOptions): Promise<ExecResult>;
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