/**
 * CostTelemetryBridge — forwards local token/cost accounting events to the
 * HQ publisher as `session.usage` envelopes, giving the command center the
 * granular per-call cost signal it needs to render live cost trends and
 * roll-ups across every connected machine.
 *
 * Source: the `token.accounted` EventBus event, emitted by the TokenCounter
 * (`infrastructure/token-counter.ts`) after every provider call. The payload
 * is plain serializable data (usage counts + a cost breakdown, plus the
 * provider/model that priced it and cache token counts) — no closures.
 *
 * This is the high-frequency cost feed; HQ's persistence layer time-buckets
 * these into trend series (per-bucket totals + per-model/per-provider
 * breakdowns).
 *
 * @module hq/cost-bridge
 */
import type { EventBus } from '../kernel/events.js';
import type { HqEventEnvelope } from './protocol.js';
import { type BridgeContextOptions } from './bridge-context.js';
export interface CostTelemetryBridgeOptions extends BridgeContextOptions {
    /** Local EventBus emitting `token.accounted`. */
    events: EventBus;
}
/**
 * Start forwarding token/cost events to HQ. Returns a disposer that
 * unsubscribes the listener — call on shutdown.
 */
export declare function startCostTelemetryBridge(opts: CostTelemetryBridgeOptions): () => void;
/** Re-export for type-only consumers. */
export type { HqEventEnvelope };
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