/**
 * Config Source Registry for B2C SDK.
 *
 * Provides a global registry for {@link ConfigSource} instances that are
 * automatically included in configuration resolution via {@link resolveConfig}.
 *
 * ## SDK Usage
 *
 * ```typescript
 * import { globalConfigSourceRegistry, type ConfigSource } from '@salesforce/b2c-tooling-sdk/config';
 *
 * const envSource: ConfigSource = {
 *   name: 'env-vars',
 *   load() {
 *     return {
 *       config: { hostname: process.env.SFCC_SERVER },
 *       location: 'environment',
 *     };
 *   },
 * };
 *
 * globalConfigSourceRegistry.register(envSource);
 * ```
 *
 * ## CLI Plugin Usage
 *
 * Plugins can provide config sources via the `b2c:config-sources` hook.
 * Sources are registered with this registry during command initialization.
 *
 * @module config/config-source-registry
 */
import type { ConfigSource } from './types.js';
/**
 * Registry for configuration sources.
 *
 * The registry collects {@link ConfigSource} instances and makes them available
 * to {@link resolveConfig}, which automatically includes globally registered
 * sources in every resolution. Sources are sorted by priority alongside
 * default and explicitly-passed sources.
 *
 * ## Usage Modes
 *
 * **SDK Mode**: Register sources directly via `register()`:
 * ```typescript
 * globalConfigSourceRegistry.register(mySource);
 * ```
 *
 * **CLI Mode**: Sources are collected via the `b2c:config-sources` hook
 * and registered during command initialization.
 */
export declare class ConfigSourceRegistry {
    private sources;
    /**
     * Registers a config source.
     *
     * Sources participate in priority sorting alongside default sources
     * when {@link resolveConfig} is called. Set the source's `priority`
     * property to control ordering (lower number = higher priority).
     *
     * @param source - The config source to register
     */
    register(source: ConfigSource): void;
    /**
     * Unregisters a config source by name.
     *
     * @param name - The name of the source to remove
     * @returns true if a source was removed, false if not found
     */
    unregister(name: string): boolean;
    /**
     * Returns all registered sources.
     *
     * Returns a shallow copy to prevent external mutation of the registry.
     *
     * @returns Array of registered config sources
     */
    getSources(): ConfigSource[];
    /**
     * Clears all registered sources.
     *
     * Primarily useful for testing.
     */
    clear(): void;
    /**
     * Returns the number of registered sources.
     */
    get size(): number;
    /**
     * Returns the names of all registered sources.
     */
    getSourceNames(): string[];
}
/**
 * Global config source registry instance.
 *
 * This is the default registry used by {@link resolveConfig}. Register
 * config sources here to have them automatically included in configuration
 * resolution.
 *
 * @example
 * ```typescript
 * import { globalConfigSourceRegistry } from '@salesforce/b2c-tooling-sdk/config';
 *
 * globalConfigSourceRegistry.register({
 *   name: 'my-source',
 *   load(options) {
 *     return {
 *       config: { hostname: 'example.com' },
 *       location: 'my-source',
 *     };
 *   },
 * });
 * ```
 */
export declare const globalConfigSourceRegistry: ConfigSourceRegistry;