import type { ONICheckpoint, ONICheckpointer, CheckpointListOptions } from "../types.js";
export declare class NamespacedCheckpointer<S> implements ONICheckpointer<S> {
    private readonly inner;
    private readonly ns;
    constructor(inner: ONICheckpointer<S>, ns: string);
    private prefix;
    get(threadId: string): Promise<ONICheckpoint<S> | null>;
    put(checkpoint: ONICheckpoint<S>): Promise<void>;
    list(threadId: string, opts?: CheckpointListOptions): Promise<ONICheckpoint<S>[]>;
    delete(threadId: string): Promise<void>;
}
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