import type { Chapter, ChapterEntryTransition } from '../core/types/story';
export type ResolvedChapterTiming = {
    entryTransition: ChapterEntryTransition;
    presentationDurationMs: number;
    advanceDelayMs?: number;
    migratedFromLegacy: boolean;
};
/**
 * Resolves old and new timing without adding in-chapter camera motion. Legacy
 * transitionTimeMs continues to drive both the existing entry tween and the
 * silent chapter presentation window until the author sets explicit values.
 */
export declare const resolveChapterTiming: (chapter: Chapter) => ResolvedChapterTiming;
export declare const migrateLegacyChapterTiming: (chapter: Chapter) => Chapter;