/**
 * ContextCollapser — Zero-dependency extraction summarizer for technical logs & history.
 *
 * Replaces: Ollama for summarize_long_text and compress_context.
 * Algorithm: Query-Focused TF-IDF Centroid sentence extraction + Jaccard dedup.
 * Latency:   <15ms for 100k characters.
 */
export interface CollapseOptions {
    maxLength?: number;
    query?: string;
    ratio?: number;
}
/**
 * Split text into logical blocks (sentences or log chunks).
 */
export declare function splitIntoSentences(text: string): string[];
/**
 * Summarize long text locally by selecting the most semantically dense sentences.
 */
export declare function collapseContext(text: string, options?: CollapseOptions): string;
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