/**
 * Checkpoint clean subcommand.
 *
 * Removes expired checkpoints (older than DEFAULT_CHECKPOINT_TTL_MS).
 * Accepts `--all` flag to remove ALL checkpoints regardless of TTL.
 * Prints count of removed checkpoints.
 *
 * @module
 */
export declare const cleanCommand: import("citty").CommandDef<{
    readonly all: {
        readonly type: "boolean";
        readonly alias: ["a"];
        readonly description: "Remove ALL checkpoints regardless of TTL";
    };
}>;
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