/**
 * Running past the end of a scripted model is an error.
 *
 * A harness test scripts the turns the agent should take, then asserts on what
 * happened. When the agent asks for more turns than the script has, the mock
 * used to answer with a copy of the LAST turn: a looping agent (a Stop hook
 * that keeps blocking, a retry, a reaction to a tool result) then ran on turns
 * nobody scripted, a final `{ tool }` re-ran its side effect, and the test went
 * green over a run it never described (#340). Pure and shared by both mocks
 * (Anthropic Messages, OpenAI Responses) and the runner that fails the test.
 */
import type { ModelRequest } from "./harness-driver.js";
/** The first request the script could not answer. */
export interface ScriptOverrun {
    /** How many turns the script had. */
    readonly scripted: number;
    /** 1-based number of the agent request that had no turn left. */
    readonly request: number;
    /** The last message that request carried (what the agent was reacting to). */
    readonly lastMessage: string;
}
/** Why a test failed because the agent outran its script. */
export declare function scriptOverrunMessage(o: ScriptOverrun): string;
/**
 * The first agent request past the end of a script of `scripted` turns, read
 * off the recorded requests (side-channel calls never consume a turn, so they
 * do not count). Undefined when the agent stayed inside the script.
 */
export declare function findScriptOverrun(scripted: number, requests: readonly ModelRequest[]): ScriptOverrun | undefined;
/** {@link findScriptOverrun} and {@link scriptOverrunMessage} in one: the message, or undefined. */
export declare function overrunMessageFor(scripted: number, requests: readonly ModelRequest[]): string | undefined;
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