export declare const AGENT_TRACE_SCHEMA_VERSION = 4;
export declare const AGENT_SPAN_NAMES: {
    readonly approval: "agent.approval";
    readonly channelRequest: "agent.channel.request";
    readonly step: "agent.step";
};
export declare const AGENT_USAGE_ATTRIBUTES: {
    readonly costUsd: "agent.usage.cost_usd";
    readonly inputTokens: "agent.usage.input_tokens";
    readonly outputTokens: "agent.usage.output_tokens";
    readonly cacheReadTokens: "agent.usage.cache_read_tokens";
    readonly cacheWriteTokens: "agent.usage.cache_write_tokens";
};
export declare function agentInvocationSpanName(agentName: string | undefined): string;
export declare function modelSpanName(modelId: string): string;
export interface AgentSamplingOperation {
    readonly name: string;
    readonly attributes?: Readonly<Record<string, string | number | boolean | undefined>>;
}
interface AgentSpanRecord {
    readonly name: string;
    readonly attributes: Readonly<Record<string, unknown>>;
}
/** Marks the `execute_tool` span of a tool call made outside any conversation. */
export declare const DIRECT_TOOL_CALL_ATTRIBUTE = "eve.tool.invocation";
export declare const DIRECT_TOOL_CALL_VALUE = "direct";
/**
 * A direct tool call has no turn, so its own span is what starts and ends
 * its claim on the trace, the way an activation span does for a turn.
 */
export declare function isDirectToolCallSpan(span: Pick<AgentSpanRecord, "attributes">): boolean;
export declare function isAgentActivationSpan(span: AgentSpanRecord): boolean;
export declare function agentTurnIdentity(span: AgentSpanRecord): string | undefined;
export {};