interface TokenUsage {
    input_tokens?: number;
    output_tokens?: number;
    cache_read_input_tokens?: number;
    cache_creation_input_tokens?: number;
    total_tokens?: number;
    cache_creation?: {
        ephemeral_5m_input_tokens?: number;
        ephemeral_1h_input_tokens?: number;
    };
}
/**
 * Gets accurate token count from JSONL transcript file
 * Used by both statusline and session selector for consistency
 */
export declare function getTokenCount(transcriptPath: string): Promise<number>;
/**
 * Gets the current token count from the last message in JSONL transcript
 * Used specifically for statusline to show current context window usage
 */
export declare function getCurrentTokenCount(transcriptPath: string): Promise<number>;
/**
 * Calculate cumulative total from usage data
 * Used by both getTokenCount and TUI for consistency
 */
export declare function calculateCumulativeTotal(usage: TokenUsage): number;
/**
 * Calculate conversation growth (input + output tokens only)
 * This represents actual context window consumption, not caching efficiency
 */
export declare function calculateConversationGrowth(usage: TokenUsage): number;
export declare function calculateRemainingCapacity(currentTotal: number, contextWindowLimit?: number): {
    remaining: number;
    percentage: number;
    isNearLimit: boolean;
};
/**
 * Rough estimation of tokens from content string or size
 * Using simple heuristic from config (consistent across codebase)
 */
export declare function estimateTokensFromContent(content: string): number;
export declare function estimateTokensFromContent(size: number): number;
export {};
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