import type { LifecycleState } from "../../schemas/index";
/**
 * Returns the current runtime lifecycle state.
 *
 * Safe to call from any lifecycle state — `state()` is never blocked by the
 * lifecycle gate (along with `suspend()` and `resume()`).
 *
 * @returns The current lifecycle state:
 *   - `"active"`: all SDK operations are allowed
 *   - `"suspending"` | `"suspended"` | `"resuming"`: non-lifecycle operations
 *     throw `LifecycleOperationBlockedError`
 *
 * @throws {InvalidResponseError} When the response envelope does not match the request type.
 *
 * @example
 * // Branch on lifecycle state before issuing work
 * const current = await state();
 * if (current !== "active") {
 *   await resume();
 * }
 */
export declare function state(): Promise<LifecycleState>;
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