import { type ToolDefinition } from "@earendil-works/pi-coding-agent";
import type { TSchema } from "typebox";
export interface StructuredOutputCapture<T = unknown> {
    value: T | undefined;
    called: boolean;
    count: number;
    duplicateCall: boolean;
}
export declare const STRUCTURED_OUTPUT_CONTRACT: string;
/**
 * Appended to a schema-less workflow subagent's task so it knows its final text
 * is the script's verbatim return value, not a message to a person.
 */
export declare const WORKFLOW_PLAIN_TEXT_OUTPUT_NOTE: string;
/**
 * A terminating output tool: pi validates the model's call against `schema`, and
 * the first validated arguments become the subagent's structured result
 * (captured into `capture`). `terminate: true` lets pi end on the tool call;
 * the count guard remains for runtimes/providers that somehow produce duplicates.
 */
export declare function createStructuredOutputTool(schema: unknown, capture: StructuredOutputCapture): ToolDefinition<TSchema, unknown>;