export declare function debugLog(eventName: string, payload?: unknown): void;
/**
 * Write a debug line into a per-session log file.
 * The file is always **appended** — it is never cleared within a session.
 * Files live under `logsDir()/<sessionId>.log`.
 */
export declare function debugLogSession(sessionId: string, eventName: string, payload?: unknown): void;
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