import type { Piscina } from 'piscina';
/**
 * Compose a user-provided abort signal with a timeout watchdog and run
 * the task on the given piscina pool. The rejection shape depends on
 * which source fired:
 *
 *   - watchdog timeout  → Error(formatTimeoutMessage(ms))
 *   - user signal abort → the user's `signal.reason` if it's an Error
 *                         (otherwise piscina's AbortError, whose `cause`
 *                         is the reason)
 *   - other failure     → the original error
 *
 * `taskTimeoutMs <= 0` disables the watchdog (the user signal is still
 * forwarded). Reshaping the timeout case avoids surfacing piscina's
 * generic AbortError when a truncated task lands in logs.
 */
export declare function runWithTimeoutAndSignal<TResult>(pool: Piscina, task: unknown, userSignal: AbortSignal | undefined, taskTimeoutMs: number, formatTimeoutMessage: (ms: number) => string): Promise<TResult>;
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