import fs from "node:fs";
export declare const SCRATCH_OWNER_FILE = ".fabric-scratch.json";
export declare const SCRATCH_MAX_AGE_MS: number;
export declare const SCRATCH_RECENT_MS: number;
export declare const SCRATCH_ORPHAN_GRACE_MS: number;
export declare const SCRATCH_MAX_BYTES: number;
export declare const SCRATCH_MAX_ITEMS = 256;
type ScratchKind = "output" | "shell" | "checkpoint";
export declare const processAlive: (pid: number) => boolean;
export declare const ownedStat: (file: string) => fs.Stats | undefined;
export declare const createScratch: (kind: ScratchKind, tempRoot?: string) => string;
/** Only used on directories this process allocated, never on caller-owned roots. */
export declare const closeScratch: (directory: string) => void;
export interface ScratchSweepOptions {
    tempRoot: string;
    now?: number;
    dryRun?: boolean;
    maxAgeMs?: number;
    recentMs?: number;
    orphanGraceMs?: number;
    maxBytes?: number;
    maxItems?: number;
}
export interface ScratchSweepResult {
    eligible: string[];
    removed: string[];
    orphaned: string[];
}
/** No legacy prefix-only deletion. Unknown files, symlinks and malformed markers veto cleanup. */
export declare const sweepScratch: (options: ScratchSweepOptions) => Promise<ScratchSweepResult>;
export declare const scheduleScratchSweep: (tempRoot?: string) => void;
export {};
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