/**
 * Identity of the JavaScript thread this module instance runs on.
 *
 * The main thread is always `"main"`. Subagent host workers are numbered
 * `w1`, `w2`, … by the main-thread pool and set their id once during
 * bootstrap. Agent sessions record the thread that owns them ("home") so
 * other threads can route calls to the owner instead of touching a copy.
 */
/** Owning thread of an agent session or other thread-bound object. */
export type ThreadId = "main" | `w${number}`;
/** Thread id of this module instance; `"main"` unless a worker bootstrap set it. */
export declare function currentThreadId(): ThreadId;
/** Whether this module instance runs on the main thread. */
export declare function isMainThread(): boolean;
/** Worker bootstrap only: record the pool-assigned id before any session is created. */
export declare function setCurrentThreadId(id: ThreadId): void;
/** Narrow an untrusted value (e.g. decoded wire data) to a {@link ThreadId}. */
export declare function isThreadId(value: unknown): value is ThreadId;