/** camelCase key → 0.3.0 snake_case key, for every renamed schema key. */
export declare const LEGACY_KEY_MAP: Readonly<Record<string, string>>;
export interface NormalizeResult<T> {
    schema: T;
    /** Legacy keys that were renamed, as `path.key` strings — empty when the input was already current. */
    renamed: string[];
}
/**
 * Returns a copy of `json` with every legacy camelCase schema key renamed to
 * its snake_case form, recursively (forms, fields, repeater sub-fields,
 * approval config, rule conditions). Non-object input is returned as-is. A
 * key present in BOTH spellings keeps the snake_case value.
 */
export declare function normalizeLegacySchema<T = unknown>(json: T): NormalizeResult<T>;