/**
 * Zoe Gateway — Settings Adapter
 *
 * Dedicated storage for gateway targets, credentials, and routes.
 * Bypasses the static SettingsManager SETTINGS_MAP which rejects dynamic keys.
 * Uses atomic writes (temp file + rename) matching existing Zoe patterns.
 */
import type { Target } from './types.js';
export declare class GatewaySettingsAdapter {
    private targetsPath;
    private credentialsPath;
    private routesPath;
    private adminTargetsPath;
    private cachedTargets;
    private cachedCredentials;
    private cachedRoutes;
    private cachedAdminTargets;
    constructor(storageDir: string);
    initialize(): Promise<void>;
    loadTargets(): Promise<Record<string, Target>>;
    saveTarget(name: string, target: Target): Promise<void>;
    deleteTarget(name: string): Promise<void>;
    getTargets(): Record<string, Target>;
    loadCredentials(): Promise<Record<string, string>>;
    getCredential(key: string): string | undefined;
    setCredential(key: string, value: string): Promise<void>;
    deleteCredential(key: string): Promise<void>;
    listCredentialKeys(): string[];
    loadRoutes(): Promise<Array<{
        pattern: string;
        target: string;
        priority: number;
    }>>;
    saveRoutes(routes: Array<{
        pattern: string;
        target: string;
        priority: number;
    }>): Promise<void>;
    getRoutes(): Array<{
        pattern: string;
        target: string;
        priority: number;
    }>;
    loadAdminTargets(): Promise<Set<string>>;
    getAdminTargets(): Set<string>;
    addAdminTarget(name: string): Promise<void>;
    removeAdminTarget(name: string): Promise<void>;
    private atomicWrite;
}