/**
 * Orchestrator configuration loader and client factory.
 *
 * - `loadOrchestratorConfig()` reads orchestrator config from `.aidlc/config.yaml`.
 * - `createClient()` creates an EndpointClient from an OrchestratorConfig.
 * - `createClientFromFlags()` creates an EndpointClient from CLI flag values.
 *
 * Key constraint (Req 19.12): The orchestrator is strictly optional. All other
 * AIDLC operations must work without any orchestrator config present.
 *
 * Requirements: 19.1, 19.3, 19.12
 */
import type { ApiFormat, EndpointClient, OrchestratorConfig } from '../core/types.js';
/**
 * Load the orchestrator section from a project config file.
 *
 * Returns `null` if:
 * - The config file does not exist
 * - The file is unreadable or invalid YAML
 * - The `orchestrator` section is absent
 *
 * This ensures orchestrator remains optional (Req 19.12).
 *
 * @param configPath - Absolute path to the `.aidlc/config.yaml` file.
 */
export declare function loadOrchestratorConfig(configPath: string): OrchestratorConfig | null;
/**
 * Create an EndpointClient from an OrchestratorConfig.
 *
 * Selects the appropriate client implementation based on `config.api_format`.
 */
export declare function createClient(config: OrchestratorConfig): EndpointClient;
/**
 * Create an EndpointClient from CLI flags (--endpoint, --model, --api-format).
 *
 * CLI flags override config values per Req 19.3.
 */
export declare function createClientFromFlags(opts: {
    endpoint: string;
    model: string;
    apiFormat: ApiFormat;
}): EndpointClient;
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