import type { InferObservation } from "./infer/inferObservations.js";
/**
 * Appends observations to the observations.md log file in the given memory directory.
 * Each entry is timestamped. Skips writing if observations array is empty.
 *
 * Expects: memoryDir is an absolute path; observations contain non-empty text/context.
 */
export declare function observationLogAppend(memoryDir: string, observations: InferObservation[], now?: number): Promise<void>;
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