/**
 * Natural Language Test Assertions — write test assertions in plain English.
 *
 * Evaluates assertions like "Response mentions temperature" against agent outputs
 * using pattern matching, keyword extraction, and semantic heuristics.
 *
 * @module nl-assert
 */
import type { AssertionResult } from './types';
export interface NLAssertion {
    text: string;
    negated: boolean;
    category: NLAssertionCategory;
    keywords: string[];
}
export type NLAssertionCategory = 'contains' | 'not_contains' | 'tone' | 'format' | 'factual' | 'length' | 'safety' | 'custom';
export interface NLTestCase {
    input: string;
    assertions: string[];
    tags?: string[];
}
export interface NLTestSuite {
    name: string;
    description?: string;
    tests: NLTestCase[];
}
export interface NLEvalResult {
    assertion: string;
    passed: boolean;
    confidence: number;
    reason: string;
}
export interface NLTestResult {
    input: string;
    output: string;
    results: NLEvalResult[];
    allPassed: boolean;
}
/**
 * Parse a natural language assertion string into structured form.
 */
export declare function parseNLAssertion(text: string): NLAssertion;
/**
 * Categorize an assertion into a type.
 */
export declare function categorizeAssertion(text: string): NLAssertionCategory;
/**
 * Extract meaningful keywords from assertion text.
 */
export declare function extractKeywords(text: string): string[];
/**
 * Evaluate a single NL assertion against an output string.
 */
export declare function evaluateNLAssertion(assertion: NLAssertion, output: string): NLEvalResult;
/**
 * Evaluate all NL assertions for a test case against an output.
 */
export declare function evaluateNLTest(testCase: NLTestCase, output: string): NLTestResult;
/**
 * Convert NL eval results to standard AssertionResults for integration with the test runner.
 */
export declare function nlResultsToAssertions(nlResult: NLTestResult): AssertionResult[];
/**
 * Format NL test results for display.
 */
export declare function formatNLResults(results: NLTestResult[]): string;
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