/**
 * .what = the test runner currently executing the code
 * .why = enables isomorphic behavior between vitest and jest
 */
export type TestRunner = 'vitest' | 'jest';
/**
 * .what = detects which test runner is currently executing
 * .why = enables runtime selection of test framework apis
 *
 * .note = vitest is checked first as it's more specific
 */
export declare const detectTestRunner: () => TestRunner;
export declare const getTestRunner: () => TestRunner;
/**
 * .what = resets the cached runner (for testing only)
 * .why = allows tests to verify detection logic with different env states
 */
export declare const resetTestRunnerCache: () => void;