/**
 * Topic-Shift Detector
 *
 * Detects when conversation drifts to a new topic by comparing
 * the semantic embedding of the latest message against the
 * centroid of recent conversation context.
 *
 * When a significant shift is detected, suggests creating a
 * scoped worker thread so the main thread stays focused.
 */
import type { Database } from "./schema.js";
interface TopicShiftResult {
    shifted: boolean;
    similarity: number;
    suggestedTopic: string;
    recentTopicSummary: string;
}
/**
 * Detect if a new message represents a topic shift from recent conversation.
 *
 * Returns null if detection can't run (too few messages, no API key, etc.)
 */
export declare function detectTopicShift(db: Database, threadId: number, newMessage: string): Promise<TopicShiftResult | null>;
export {};
//# sourceMappingURL=topic-shift.d.ts.map