import type { GraderFn, JudgeCallFn, JudgeCallOptions } from "../../config/types.js";
/** Options for the `factuality` LLM-as-judge grader. Requires `expected.text` on each case. */
export interface FactualityOptions {
    /** Override the judge function from config for this grader only. */
    readonly judge?: JudgeCallFn | undefined;
    /** Override judge call options (temperature, model, maxTokens). */
    readonly judgeOptions?: JudgeCallOptions | undefined;
    /** Minimum normalized score (0-1) to pass. @default 0.75 */
    readonly passThreshold?: number | undefined;
}
/**
 * Factuality grader — evaluates whether output is factually consistent with
 * the expected reference. Requires `expected.text` to be set on each case.
 *
 * Implemented as a specialized llmRubric with locked criteria and calibration examples.
 *
 * @example
 * ```ts
 * import { factuality } from "agent-eval-kit";
 *
 * // In eval.config.ts — cases must include expected.text
 * {
 *   defaultGraders: [{ grader: factuality() }],
 *   cases: [{
 *     id: "capital",
 *     input: { question: "What is the capital of France?" },
 *     expected: { text: "The capital of France is Paris." },
 *   }],
 * }
 *
 * // With a lower pass threshold
 * factuality({ passThreshold: 0.5 })
 * ```
 */
export declare function factuality(options?: FactualityOptions): GraderFn;
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