/**
 * Event handlers for message streaming events:
 * message_start, message_update, message_end.
 *
 * The harness streams the canonical `MastraDBMessage` shape: assistant text /
 * reasoning / tool calls live as nested `content.parts`, and signals arrive as
 * their own `role: 'signal'` messages (their own `message_start`/`message_end`
 * pair) rather than inline parts of an assistant message. Signal rendering is
 * therefore delegated to `addUserMessage` / `renderSignalMessage`; this file
 * only drives the streaming assistant component and its tool boundaries.
 */
import type { MastraDBMessage } from '@mastra/core/agent-controller';
import type { EventHandlerContext } from './types.js';
export declare function handleMessageStart(ctx: EventHandlerContext, message: MastraDBMessage): void;
export declare function handleMessageUpdate(ctx: EventHandlerContext, message: MastraDBMessage): void;
export declare function handleMessageEnd(ctx: EventHandlerContext, message: MastraDBMessage): void;
//# sourceMappingURL=message.d.ts.map