/**
 * Structured error response helpers for MCP tool handlers.
 * All tool handlers return these formats — never throw to the MCP transport.
 */
/** Wrap a successful result in MCP tool response format */
export declare function toolResult(data: object): {
    content: {
        type: "text";
        text: string;
    }[];
};
/** Wrap an error in MCP tool response format */
export declare function toolError(message: string, code: string): {
    content: {
        type: "text";
        text: string;
    }[];
};
/** Twining-specific error with a machine-readable code */
export declare class TwiningError extends Error {
    code: string;
    constructor(message: string, code: string);
}
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