/**
 * Startup orphan sweep — Option C long-running mode.
 *
 * Every child spawned by LongRunningSupervisor carries a marker env var:
 *   SENPI_SUPERVISED=<supervisorId>
 *
 * When the runtime is killed hard (SIGKILL, OOM, power-cycle) the graceful
 * shutdown code never runs and supervised children become orphans. The sweep
 * scans `ps` for processes carrying the marker and kills them (group kill +
 * descendant reap). It must be called by the host BEFORE any new spawning.
 *
 * This is a static, standalone utility — no class, no instance state.
 */
import type { Logger } from "../../utils/logger.js";
/** The env-var name stamped on every supervised child. */
export declare const SENPI_SUPERVISED_ENV = "SENPI_SUPERVISED";
/** Result of a single orphan-sweep run. */
export interface SweepResult {
    /** Number of orphaned root processes found (carrying the marker). */
    found: number;
    /** PIDs that were signalled (best-effort; some may have already been gone). */
    killed: number[];
}
/**
 * Scan `ps` for processes carrying `SENPI_SUPERVISED[=<supervisorId>]` in
 * their environment, kill them (SIGKILL to process group + descendant reap),
 * and return a summary.
 *
 * @param supervisorId  If provided, only sweep orphans for this specific
 *   supervisor; otherwise sweep ALL `SENPI_SUPERVISED` orphans (full reset).
 * @param logger        Structured logger.
 *
 * POSIX-only.  On Windows returns { found: 0, killed: [] } immediately.
 */
export declare function sweepOrphans(supervisorId: string | undefined, logger: Logger): SweepResult;
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