import type { NodeName, ONICheckpointer, ONICheckpoint, ChannelSchema } from "../types.js";
import type { PregelContext, PendingSend } from "./types.js";
export declare function saveCheckpoint<S extends Record<string, unknown>>(ctx: PregelContext<S>, threadId: string, step: number, state: S, nextNodes: NodeName[], pendingSends: PendingSend[], agentId?: string, metadata?: Record<string, unknown>, pendingWrites?: Array<{
    nodeId: string;
    writes: Record<string, unknown>;
}>): Promise<void>;
export declare function getState<S extends Record<string, unknown>>(checkpointer: ONICheckpointer<S> | null, threadId: string): Promise<S | null>;
export declare function updateState<S extends Record<string, unknown>>(checkpointer: ONICheckpointer<S> | null, channels: ChannelSchema<S>, threadId: string, update: Partial<S>): Promise<void>;
export declare function getStateAt<S extends Record<string, unknown>>(checkpointer: ONICheckpointer<S> | null, threadId: string, step: number): Promise<S | null>;
export declare function getHistory<S extends Record<string, unknown>>(checkpointer: ONICheckpointer<S> | null, threadId: string): Promise<ONICheckpoint<S>[]>;
export declare function forkFrom<S extends Record<string, unknown>>(checkpointer: ONICheckpointer<S> | null, threadId: string, step: number, newThreadId: string): Promise<void>;
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