/**
 * AgentMessage Repository Interface (Output Port)
 *
 * Defines the contract for AgentMessage persistence on the SQLite-backed
 * agent message bus (spec 093). Append-only — messages are never updated
 * after creation other than to set deliveredAt when the bus marks them
 * delivered. Every read MUST be scoped by appId for cross-app isolation
 * (NFR-7).
 */
export {};
