/**
 * Garbage collection for large-result offload files.
 *
 * Offloads live under `<configDir>/offloads/<sessionId>/*.log`. This sweep
 * removes per-session directories older than `SPECTRAL_OFFLOAD_TTL_DAYS`
 * (default 7) and, when the total still exceeds `SPECTRAL_OFFLOAD_MAX_MB`
 * (default 500), evicts the oldest sessions first.
 *
 * Best-effort and synchronous: callers fire-and-forget it during preflight.
 */
export declare const DEFAULT_OFFLOAD_TTL_DAYS = 7;
export declare const DEFAULT_OFFLOAD_MAX_MB = 500;
export declare function getOffloadTtlMs(): number;
export declare function getOffloadMaxBytes(): number;
export interface OffloadSweepResult {
    removedSessions: number;
    removedBytes: number;
}
/** Remove stale/over-budget offload directories. Never throws. */
export declare function sweepOffloads(root?: string): OffloadSweepResult;
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