/**
 * Codex Session Parser
 *
 * Parses local Codex session logs from ~/.codex/sessions/
 * to extract token usage data for cost tracking.
 *
 * Session files are JSONL format where each line is a separate event.
 * Token usage is embedded in "event_msg" entries with type "token_count".
 */
export interface TokenUsage {
    inputTokens: number;
    outputTokens: number;
    cacheCreationTokens: number;
    cacheReadTokens: number;
}
export interface CodexSessionUsage {
    sessionId: string;
    projectHash: string;
    projectName?: string;
    model: string;
    tokens: TokenUsage;
    messageCount: number;
    startTime: string;
    endTime: string;
    activeMinutesEstimate: number;
    filePath: string;
}
export interface CodexSessionUsageDetailed extends CodexSessionUsage {
    dailyUsage: Record<string, TokenUsage>;
    rangeUsage?: TokenUsage;
    rangeActiveMinutesEstimate?: number;
}
export interface CodexSessionFile {
    path: string;
    sessionId: string;
    lastModified: Date;
    size: number;
}
export declare function getCodexSessionsDir(): string;
export declare function codexDirectoryExists(): boolean;
export declare function discoverCodexSessions(maxAgeHours?: number): CodexSessionFile[];
export declare function parseCodexSessionDetailed(filePath: string, options?: {
    rangeStart?: Date;
    rangeEnd?: Date;
}): CodexSessionUsageDetailed | null;
export declare function parseAllCodexSessionsDetailed(maxAgeHours?: number, options?: {
    rangeStart?: Date;
    rangeEnd?: Date;
}): CodexSessionUsageDetailed[];
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