/**
 * Source scanning for translatable messages.
 *
 * Dependency-free, best-effort extraction: it recognises two anchors without
 * needing a full JavaScript parser —
 *
 * 1. `defineMessages({ ... })` catalog literals — keys **and** their default
 *    message strings are extracted.
 * 2. `t('key')` / `tc('key')` / `i18n.t('key')` translation calls — the key is
 *    extracted with an empty default (a string awaiting translation).
 *
 * The scanner is intentionally conservative: anything it cannot understand as a
 * string or nested object is skipped rather than guessed at.
 *
 * @module bquery/i18n
 */
/** A nested catalog of message strings. */
export type ExtractedCatalog = {
    [key: string]: string | ExtractedCatalog;
};
/** A single extracted message, keyed by its dot-delimited path. */
export type ExtractedMessage = {
    key: string;
    value: string;
};
/** Flattens a nested catalog into dot-delimited `key → value` entries. */
export declare const flatten: (catalog: ExtractedCatalog, prefix?: string) => ExtractedMessage[];
/**
 * Reconstructs a nested catalog from sorted dot-delimited entries.
 *
 * Keys are scanned from untrusted source files, so a `__proto__`, `constructor`
 * or `prototype` segment is rejected inline — right where each computed-property
 * assignment happens — to stop a malicious key from walking into or overwriting
 * the prototype chain.
 */
export declare const unflatten: (messages: ExtractedMessage[]) => ExtractedCatalog;
/**
 * Extracts every translatable message from a single source string.
 *
 * `defineMessages` catalogs contribute their keys **and** default values;
 * `t()` / `tc()` calls contribute keys with an empty default. Duplicate keys
 * keep the first non-empty value seen.
 *
 * @param source - File contents to scan
 * @returns Flat, de-duplicated extracted messages
 */
export declare const extractFromSource: (rawSource: string) => ExtractedMessage[];
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