/**
 * Config emitters, typed wrappers for the ConfigEvent domain.
 *
 * Used by the config emit-bridge (runtime/config/emit-bridge.ts) to surface
 * key-level setting changes onto the runtime event bus `config` domain, which
 * the control-plane gateway fans out to subscribed SSE/WebSocket clients
 * unchanged.
 */
import type { RuntimeEventBus } from '../events/index.js';
import type { ConfigEventScope, ConfigEventValue } from '../../../events/config.js';
import type { EmitterContext } from './index.js';
/**
 * Announce that one config key changed.
 *
 * `value` must be OMITTED for a secret-bearing key rather than passed as null:
 * the absence is the contract, and a null would read as "the credential was
 * cleared". The bridge is the one place that decides which it is.
 */
export declare function emitConfigKeyChanged(bus: RuntimeEventBus, ctx: EmitterContext, data: {
    key: string;
    scope: ConfigEventScope;
    secret: boolean;
    value?: ConfigEventValue | undefined;
    changedAt: number;
}): void;
//# sourceMappingURL=config.d.ts.map