/**
 * Which modules the server loads.
 *
 * - `--modules fred,bls` / `MODULES`: modules by name.
 * - `--domains economy,health` / `DOMAINS`: every module in those domains.
 *   When both are given, the selection is their union. With neither, all
 *   modules are loaded.
 * - `--hide-unconfigured` / `HIDE_UNCONFIGURED=1`: after selecting, drop
 *   modules whose required API key isn't set. Optional-key modules stay.
 *
 * Unknown module or domain names are errors, not silently ignored, so a typo
 * can't quietly load a different set of tools than intended.
 */
import { type ApiModule } from "../shared/types.js";
export interface ModuleSelection {
    modules?: string;
    domains?: string;
    hideUnconfigured?: boolean;
}
export interface SelectionResult {
    active: ApiModule[];
    /** Selected modules dropped by hideUnconfigured, with their missing env vars. */
    hidden: {
        name: string;
        missing: string[];
    }[];
}
/** Apply a selection to the discovered modules. Throws with a helpful message on bad input. */
export declare function selectModules(all: ApiModule[], sel: ModuleSelection, env?: NodeJS.ProcessEnv): SelectionResult;
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