import type { Span } from "#compiled/@opentelemetry/api/index.js";
import type { InstrumentationUsage } from "#instrumentation/lifecycle.js";
import type { AgentTurnTraceState } from "#tracing/agent-trace-state.js";
/** Applies eve's structural token usage attributes to an agent span. */
export declare function setAgentUsage(span: Span, usage: InstrumentationUsage): void;
/** Applies standard GenAI token usage and retains eve's cost attribute. */
export declare function setGenAiUsage(span: Span, usage: InstrumentationUsage): void;
export declare function setAgentInvocationUsage(span: Span, modelUsage: AgentTurnTraceState["modelUsage"]): void;
/** Projects Vercel AI Gateway cost metadata onto GenAI span attributes. */
export declare function readGatewayCost(providerMetadata: Readonly<Record<string, unknown>>): Record<string, string | number> | undefined;