/**
 * Allowed top-level keys in `iparams.json`.
 */
export declare const IPARAMS_INSTALLATION_PARAMETERS_LABEL = "installation_parameters";
export declare const IPARAMS_ROOT_ALLOWED_KEYS: readonly ["installation_parameters"];
/**
 * File name for iparam definitions in an app directory.
 */
export declare const IPARAMS_JSON_FILENAME = "iparams.json";
/**
 * Label for the `sections` array in validation error messages.
 */
export declare const IPARAMS_SECTIONS_LABEL = "sections";
/**
 * Allowed keys under `installation_parameters` in `iparams.json`.
 */
export declare const IPARAMS_INSTALLATION_PARAMETERS_ALLOWED_KEYS: readonly ["sections"];
/**
 * Maximum number of parameter definitions allowed in a single `iparams.json` array.
 */
export declare const IPARAMS_MAX_COUNT = 20;
/**
 * Central limits for iparam definition fields (`iparams.json`).
 */
export declare const IPARAM_DEFN_MAX_LENGTHS: {
    readonly NAME: 50;
    readonly DISPLAY_NAME: 50;
    readonly DESCRIPTION: 250;
};
/**
 * Limits for DROPDOWN and MULTISELECT_DROPDOWN `options` arrays in definitions.
 */
export declare const OPTIONS_LIMITS: {
    readonly MAX_COUNT: 20;
    readonly MAX_OPTION_LENGTH: 250;
};
/**
 * Max lengths for iparam input values when validating `iparams.local.json` / runtime inputs.
 */
export declare const IPARAM_VALUE_MAX_LENGTHS: {
    readonly TEXT: 250;
    readonly SECRET: 250;
    readonly URL: 250;
    readonly DATE: 10;
};
/**
 * Allowed {@link URL#protocol} values for iparam type `URL`.
 */
export declare const IPARAM_URL_ALLOWED_PROTOCOLS: readonly ["http:", "https:"];