/**
 * Version of the protocol a parent deployment speaks with a remote agent's
 * deployment. A create-session request that delegates work names the caller's
 * version, and the receiver's response names its own. Deployments from before
 * the version existed speak 1.
 */
export declare const REMOTE_AGENT_PROTOCOL_VERSION = 2;
/** Error code a receiver answers when the caller speaks another protocol version. */
export declare const REMOTE_AGENT_PROTOCOL_MISMATCH = "REMOTE_AGENT_PROTOCOL_MISMATCH";
/** Protocol of eve 0.66–0.68, which sent no version. */
export declare const UNVERSIONED_REMOTE_AGENT_PROTOCOL = 1;
/** Reads a peer's protocol version, treating an absent one as the unversioned protocol. */
export declare function readRemoteAgentProtocolVersion(value: unknown): number;
/** The caller's message when a remote agent's deployment speaks another version. */
export declare function formatRemoteAgentProtocolMismatch(input: {
    readonly name: string;
    readonly receiverVersion: number;
}): string;