import type { ChunkOptions } from "./types.js";
/**
 * Splits text into overlapping chunks for embedding.
 *
 * Uses a recursive character splitting strategy: tries each separator in
 * order (paragraphs → lines → words → characters) to produce semantically
 * coherent chunks within the size limit.
 *
 * Default chunk size is 2000 characters (~512 tokens), aligned with
 * common embedding model context limits (e.g. OpenAI's 8191-token max).
 *
 * @example
 * ```ts
 * const chunks = await chunk("long document...", { maxChars: 2000, overlap: 200 });
 * ```
 */
export declare function chunk(text: string, options?: ChunkOptions): Promise<string[]>;
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