/**
 * CTRF Runtime API for WebdriverIO
 *
 * Enables enriching CTRF test reports with custom metadata at runtime.
 *
 * ## Usage
 *
 * ```ts
 * import { extra } from 'wdio-ctrf-json-reporter/runtime'
 *
 * describe('My feature', () => {
 *   it('should work', () => {
 *     extra({ owner: 'team-a', priority: 'P1' })
 *     // test code...
 *   })
 * })
 * ```
 *
 * ## Behavior
 *
 * - Call multiple times; data is deep merged (arrays concat, objects recurse, primitives overwrite)
 * - Works from any function in the call stack during test execution
 * - Silently ignored when called outside test context
 * - Later values override earlier for same keys
 */
import { CTRF_RUNTIME_KEY, type CtrfRuntimeHandler, type CtrfRuntimeMessage } from './reporter';
/**
 * Attach arbitrary key-value metadata to the current test.
 * Multiple calls are deep-merged (arrays concatenated, objects recursed, primitives overwritten).
 *
 * @param data - An object containing metadata to attach
 */
export declare function extra(data: Record<string, unknown>): void;
export declare const ctrf: {
    readonly extra: typeof extra;
};
export { CTRF_RUNTIME_KEY, type CtrfRuntimeHandler, type CtrfRuntimeMessage };