export declare const SPAN_ATTRIBUTES: {
    readonly modelId: "model.id";
    readonly modelVersion: "model.version";
    readonly runtimeExecutor: "runtime.executor";
    readonly requestMode: "request.mode";
    readonly locality: "locality";
    readonly streaming: "streaming";
    readonly routePolicy: "route.policy";
    readonly routeDecision: "route.decision";
    readonly deviceClass: "device.class";
    readonly fallbackReason: "fallback.reason";
    readonly errorType: "error.type";
    readonly toolCallTier: "tool.call_tier";
    readonly kvCacheStrategy: "kv_cache.strategy";
    readonly kvCacheQuantizationBits: "kv_cache.quantization_bits";
    readonly kvCacheCompressionRatio: "kv_cache.compression_ratio";
    readonly modelSourceFormat: "model.source_format";
    readonly modelSizeBytes: "model.size_bytes";
    readonly toolName: "tool.name";
    readonly toolRound: "tool.round";
    readonly fallbackProvider: "fallback.provider";
    readonly assignmentCount: "assignment_count";
    readonly heartbeatSequence: "heartbeat.sequence";
    readonly rolloutId: "rollout.id";
    readonly modelsSynced: "models_synced";
};
export declare const SPAN_REQUIRED_ATTRIBUTES: Record<string, string[]>;
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