/**
 * OpenCode CLI Invoker (thin execution helper)
 *
 * Thin OpenCode fallback path under the three-subsystem Engine.
 * Owned by Autonomous Engine. All direct child_process and agent spawn execution here.
 * InferenceCycle is pure sensing + proposal + governance orchestration.
 */
export declare function invokeViaOpencode(agentName: string, prompt: string, projectRoot?: string): Promise<string>;