import type { AgentMessage } from "../internal/harness.js";
/** Read the (possibly absent) `role` off an AgentMessage defensively — the union doesn't expose it
 *  uniformly, so context passes narrow by role with a single cast in one place. */
export declare function messageRole(m: AgentMessage): string | undefined;
/** True if the message is a tool-result message (shared by the context-edit and context-guard passes). */
export declare function isToolResult(m: AgentMessage): boolean;
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