import type { GatewayIdentity } from "./contracts.js";
export declare const MCP_FRAME_LIMIT: number;
export declare const MCP_ERRORS: readonly ["MCP 请求无效", "MCP 网关不可用", "请明确选择 MCP 账号", "MCP 账号不可用", "MCP 会话不可用", "MCP 会话繁忙", "MCP 会话数量已达上限", "MCP 消息处理失败", "MCP 通知队列已满"];
export interface GatewayMcpRequest {
    action: "open" | "exchange" | "poll" | "close";
    sessionId: string;
    account?: string;
    message?: string;
}
export interface GatewayMcpResult {
    message?: string | null;
    events?: string[];
}
export interface GatewayMcpMessage extends GatewayIdentity {
    type: "gateway.mcp";
    requestId: string;
    request: GatewayMcpRequest;
}
export interface GatewayMcpReply extends GatewayIdentity {
    type: "gateway.mcp.result";
    requestId: string;
    ok: boolean;
    result?: GatewayMcpResult;
    error?: (typeof MCP_ERRORS)[number];
}
export declare function mcpFrameFits(v: unknown): boolean;
export declare function isGatewayMcpRequest(v: unknown): v is GatewayMcpRequest;
export declare function isGatewayMcpResult(v: unknown): v is GatewayMcpResult;
export declare function isGatewayMcpMessage(v: unknown): v is GatewayMcpMessage;
export declare function isGatewayMcpReply(v: unknown): v is GatewayMcpReply;
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