import type{LyraMessage}from'./localization.js';
/**
* A deterministic synthetic-message transform used by Lyra's test-only pseudo locales.
* Placeholders are split out before the transform runs, so a transform can never rename or
* reorder an interpolation key.
*/
export type LyraPseudoTransform=(literal:string)=>string;
/**
* Clones an English catalog through `transform`, preserving every key, placeholder, and plural
* category. This is intentionally runtime-generated: pseudo locales are developer diagnostics,
* not translator-authored catalogs and not evidence of native-language review.
*/
export declare function createPseudoCatalog<T extends Readonly<Record<string,LyraMessage>>>(source:T,transform:LyraPseudoTransform):T;
/** Expanded accented LTR transform. Vowels expand to expose clipping and fixed-width layouts. */
export declare const pseudoExpand:LyraPseudoTransform;
/** Mirrored RTL transform. Each literal run reverses while protected placeholders stay intact. */
export declare const pseudoMirror:LyraPseudoTransform;