/**
 * Pre-constructed tools for casing, trimming, normalizing, and transforming strings.
 *
 * @module @nhtio/adk/batteries/tools/string_processing
 *
 * @remarks
 * Pre-constructed bundled tools for the `string_processing` category. Import individually, the whole
 * category, or import every tool via `@nhtio/adk/batteries`.
 */
import { Tool } from "../../../common";
/**
 * Apply an ordered pipeline of string transformations.
 *
 * @remarks
 * Each operation reads the previous step's output. Most operations return strings; `count_*`
 * return numbers and `split` returns an array — once a non-string flows through, subsequent
 * operations report an error rather than coercing. The result is always serialised to a string
 * (arrays become JSON; numbers/booleans are stringified).
 */
export declare const stringTransformTool: Tool<import("../../../common").SpooledArtifact>;
/**
 * Extract all matches of a regular expression from a string.
 *
 * @remarks
 * The `g` flag is always enabled. `group` selects which capture group to return per match (0 =
 * full match). Output is at most 500 matches; if truncated, the suffix `(truncated at 500)` is
 * appended.
 */
export declare const stringExtractTool: Tool<import("../../../common").SpooledArtifact>;