/**
 * Smart context filtering for Writer and Auditor prompts.
 *
 * Reduces noise by injecting only relevant parts of truth files.
 * Every filter falls back to the full input if filtering would empty it.
 */
export interface ContextCapOptions {
    readonly label: string;
    readonly maxChars: number;
    readonly headRatio?: number;
}
/**
 * Cap a large context block while keeping the durable setup at the beginning
 * and the latest tail. This prevents long-running books from sending full truth
 * files every chapter while still making the omission visible to the model.
 */
export declare function capContextBlock(content: string, options: ContextCapOptions): string;
/** Filter pending_hooks: remove resolved/closed hooks. */
export declare function filterHooks(hooks: string): string;
/** Filter chapter_summaries: keep only the most recent N chapters. */
export declare function filterSummaries(summaries: string, currentChapter: number, keepRecent?: 4): string;
/** Filter subplot_board: remove closed/resolved subplots. */
export declare function filterSubplots(board: string): string;
/** Filter emotional_arcs: keep only the most recent N chapters. */
export declare function filterEmotionalArcs(arcs: string, currentChapter: number, keepRecent?: 4): string;
/**
 * Filter character_matrix: keep only characters mentioned in the volume outline
 * current section + protagonist.
 */
export declare function filterCharacterMatrix(matrix: string, volumeOutline: string, protagonistName?: string): string;
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