import { type ActionMcpOutputContract } from "../action-output-contract.js";
import { type ActionOutputEffect } from "../action.js";
/**
 * Build an opted-in action's `structuredContent` and enforce its MCP response
 * contract on it. Returns the JSON form the client receives. Every failure
 * after the action ran — the transform throwing, a value JSON cannot carry, the
 * validator throwing, or a mismatch — is an `ActionOutputContractError` that
 * keeps the call's effect.
 */
export type McpResponseOutputCheck = (build: () => Record<string, unknown>, failure: {
    actionName: string;
    effect: ActionOutputEffect;
}) => Record<string, unknown>;
/**
 * An opted-in action's result as the JSON the client receives, computed once
 * so the structured check and the text read the same plain data: a `toJSON`
 * that changes or throws on a second call cannot pass the check and then fail
 * the text.
 */
export declare function mcpContractValue(value: unknown, failure: {
    actionName: string;
    effect: ActionOutputEffect;
}): unknown;
/**
 * Compile the check for an opted-in action's MCP response contract. Call it
 * before `run`: a contract that cannot be enforced must fail while nothing has
 * been applied, not after a write.
 */
export declare function mcpResponseOutputCheck(contract: ActionMcpOutputContract): McpResponseOutputCheck;