import { type ServerSpecDocument } from './ServerSpecDocument.js';
export interface SpecEnvChanges {
    set?: Record<string, string>;
    remove?: string[];
}
/**
 * `doc` with config.env-style changes applied (ADR-0003 §6), so the generic
 * config writers need no key list: TYPE, VERSION, MEMORY, LEVEL and
 * PLAYIT_DOMAIN go to their typed fields, EXTRA_ARGS to world.storage plus
 * env.EXTRA_ARGS, every other key to env. An empty VERSION, MEMORY or
 * PLAYIT_DOMAIN, like a removed one, clears the field. Pure; the input is not
 * changed. An EXTRA_ARGS that puts the world elsewhere is 'undetermined'.
 */
export declare function setEnvKeys(doc: ServerSpecDocument, changes: SpecEnvChanges): ServerSpecDocument;
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