import type { ResponseBuilder } from "../../../security/index.js";
/** Stable error code returned when the renderer is in lame-duck shutdown mode. */
export declare const RUNTIME_SHUTTING_DOWN_CODE = "RUNTIME_SHUTTING_DOWN";
/** Human-readable message paired with {@link RUNTIME_SHUTTING_DOWN_CODE}. */
export declare const RUNTIME_SHUTTING_DOWN_MESSAGE = "Runtime is shutting down; retry against another instance";
/**
 * Builds the 503 response used to reject new agent-work requests while the
 * renderer is draining. Sends `Connection: close` so the API drops the keep-alive
 * connection to this terminating pod, and deliberately omits the runtime-owner
 * invoke URL header so the API does not re-pin the run to this pod's IP.
 */
export declare function buildRuntimeShuttingDownResponse(builder: ResponseBuilder): Response;
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