import type { ToolPlugin } from "../tools/types.js";
declare const STRUCTURED_OUTPUT_TOOL_NAME = "StructuredOutput";
/**
 * Creates a system prompt addition that instructs the agent to use structured output
 */
export declare function createStructuredOutputPrompt(schema: object): string;
/**
 * Creates a StructuredOutput ToolPlugin that enforces the given schema
 */
export declare function createStructuredOutputTool(schema: object): ToolPlugin;
/**
 * Extract structured result from a completed subagent's messages.
 * Looks for StructuredOutput tool calls in the messages.
 * Falls back to JSON.parse on the last assistant message text.
 */
export declare function extractStructuredResult(messages: Array<{
    role: string;
    content?: string;
    tool_calls?: Array<{
        function: {
            name: string;
            arguments: string;
        };
    }>;
}>, schema: object): unknown | null;
export { STRUCTURED_OUTPUT_TOOL_NAME };