/**
 * Represents a parsed tool call operation from session logs
 */
export interface Operation {
    timestamp: string;
    toolName: string;
    tokens: number;
    metadata: string;
}
/**
 * Result of parsing a session log file
 */
export interface SessionLogData {
    operations: Operation[];
    toolTokens: number;
    systemReminderTokens: number;
}
/**
 * Locates a session's log, in whichever format it exists.
 *
 * TWO NAMES FOR THE SAME THING, AND ONLY ONE WAS EVER LOOKED FOR.
 *
 * Callers built `session-log-<id>.jsonl` by hand and reported "JSONL log not
 * found" when it was absent -- which is always, because nothing in this package
 * writes that file. The installed PowerShell hooks log every tool call to
 * `operations-<id>.csv` (hooks/handlers/token-optimizer-orchestrator.ps1), and
 * that is what actually accumulates on a working machine.
 *
 * Resolving the name in one place means the next caller cannot get it wrong,
 * and cannot drift.
 *
 * @returns the path to read, or null when this session genuinely has no log.
 */
export declare function resolveSessionLogPath(hooksDataPath: string, sessionId: string): string | null;
/**
 * Parse a session log and extract operations and token statistics.
 *
 * Accepts both formats: the JSONL the web server writes for live sessions, and
 * the `operations-<id>.csv` the PowerShell hooks append to. The format is
 * chosen by extension, so a caller that resolved its path with
 * resolveSessionLogPath never has to know which it got.
 *
 * Uses streaming with readline to avoid blocking the event loop on large files.
 *
 * @param logFilePath - Path to a session-log-*.jsonl or operations-*.csv file
 * @returns Parsed operations and token counts
 *
 * @remarks
 * - Skips malformed lines silently
 * - Normalizes object metadata to JSON strings
 * - Returns empty arrays/zeros if file is empty
 * - CSV logs carry no system-reminder rows, so that total is 0 for them
 */
export declare function parseSessionLog(logFilePath: string): Promise<SessionLogData>;
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