import type { RuntimeEventBus } from '../events/index.js';
import type { EmitterContext } from './index.js';
export declare function emitProvidersChanged(bus: RuntimeEventBus, ctx: EmitterContext, data: {
    added: string[];
    removed: string[];
    updated: string[];
}): void;
export declare function emitProviderWarning(bus: RuntimeEventBus, ctx: EmitterContext, data: {
    message: string;
}): void;
/** Emit PROVIDER_VOICE_USAGE for one billable voice call on a metered provider. */
export declare function emitProviderVoiceUsage(bus: RuntimeEventBus, ctx: EmitterContext, data: {
    provider: string;
    modelId?: string | undefined;
    kind: 'tts' | 'stt';
    billableUnits: number;
    unit: 'characters' | 'seconds';
}): void;
export declare function emitModelFallback(bus: RuntimeEventBus, ctx: EmitterContext, data: {
    from: string;
    to: string;
    provider: string;
}): void;
export declare function emitModelChanged(bus: RuntimeEventBus, ctx: EmitterContext, data: {
    registryKey: string;
    provider: string;
    previous?: {
        registryKey: string;
        provider: string;
    };
}): void;
//# sourceMappingURL=providers.d.ts.map