/**
 * Token usage information from streaming providers
 */
export interface TokenUsage {
    /** Number of tokens in the prompt/input */
    promptTokens: number;
    /** Number of tokens in the completion/output */
    completionTokens: number;
    /** Total tokens (prompt + completion) */
    totalTokens: number;
    /** Provider-specific model identifier */
    model?: string;
    /** Provider name (OpenAI, Anthropic, etc.) */
    provider?: string;
    /** Provider-reported cached prompt/input tokens, when available */
    cachedInputTokens?: number;
    /** Anthropic cache-write input tokens, when available */
    cacheCreationInputTokens?: number;
    /** Anthropic cache-read input tokens, when available */
    cacheReadInputTokens?: number;
    /** Additional provider-specific usage data */
    metadata?: Record<string, any>;
}
/**
 * Extended token usage with timing information
 */
export interface ExtendedTokenUsage extends TokenUsage {
    /** Time to generate the completion (ms) */
    completionTime?: number;
    /** Time to process the prompt (ms) */
    promptTime?: number;
    /** Queue time before processing (ms) */
    queueTime?: number;
    /** Tokens per second throughput */
    tokensPerSecond?: number;
}