export interface VideoUnitPromptReference {
    name: string;
    type: "character" | "scene" | "prop";
}
export interface StoryboardLayout {
    panelCount: number;
    columns: number;
    rows: number;
    panelRatio: string;
    sheetRatio: string;
}
/** Plan 4–8 Storyboard panels from runtime and narrative density. */
export declare function storyboardPanelCount(durationSeconds: number, manuscript: string): number;
/** Derive a chronological Storyboard grid and outer sheet ratio. */
export declare function storyboardLayout(panelRatio: string, panelCount: number): StoryboardLayout;
/** Compose a complete Storyboard Sheet image prompt from its standalone description. */
export declare function buildStoryboardFullPrompt(input: {
    unitId: string;
    description: string;
    styleName: string;
    styleDescription: string;
    stylePrompt: string;
    layout: StoryboardLayout;
    references: readonly VideoUnitPromptReference[];
}): string;
/** Compose a complete keyframe-image prompt from one standalone beat-entry description. */
export declare function buildKeyframeFullPrompt(input: {
    description: string;
    offsetSeconds: number;
    styleName: string;
    styleDescription: string;
    stylePrompt: string;
    references: readonly VideoUnitPromptReference[];
}): string;