import { type NodeMeta } from '../canvas/index.js';
/** True when the node's broker engine is reachable: its recorded pid is alive
 *  AND its view.sock exists. Both are required — a dead pid with a stale socket,
 *  or a live pid mid-boot before it binds the socket, is NOT a live broker. */
export declare function isBrokerLive(meta: NodeMeta): boolean;
/** Swap a LIVE node's model over its view.sock. Connects, claims controller
 *  (hello + request_control, so an attached viewer never blocks the swap), sends
 *  `set_model`, and resolves with the broker-resolved `provider/id` on its ack —
 *  read back from the row the broker just persisted (model_changed.model carries
 *  only the bare id). Rejects with the broker's message on an `error` frame (e.g.
 *  `no model matching '<spec>' in the registry`), on connect failure, or timeout.
 *  `pinned` is the durable-pin decision for this change, made by the CALLER from
 *  the RAW pre-normalize token (`spec` here is already normalizeModel-resolved,
 *  so deriving the pin from `spec`'s shape would wrongly re-pin a deliberately
 *  chosen bare tier that happens to byte-equal a ladder cell) — sent explicitly
 *  on the frame so the broker persists that decision rather than re-inferring it
 *  from the resolved spec. */
export declare function setModelLive(nodeId: string, spec: string, pinned: boolean): Promise<string>;
/** Persist a model choice into a DORMANT node's durable recipe — mirrors exactly
 *  what the broker's persistModelChoice writes on a live switch: `model_override`
 *  (so polymorphs preserve it via buildLaunchSpec) and `launch.model` (the recipe
 *  buildPiArgv replays on revive). `spec` must already be a concrete `provider/id`
 *  (normalizeModel maps tiers/aliases; a bare substring cannot resolve offline).
 *  `pinned` is the durable-pin decision for this change — decided by the CALLER
 *  from the RAW pre-normalize token, never re-derived here from `spec`'s shape
 *  (a concrete `spec` always reads as "pinned", which would wrongly re-pin a
 *  deliberately chosen bare tier that happens to byte-equal a ladder cell). */
export declare function persistDormantModel(nodeId: string, spec: string, pinned: boolean): void;