/**
 * ClientLite — v3 in-process workflow client.
 *
 * No gRPC. No network. Direct FFI calls to the embedded engine.
 */
import type { NativeEngine } from '@memoflowio/memoflow-engine';
import type { WorkerLite } from '../runtime/worker-lite.js';
import type { ForkWorkflowResult, StartWorkflowInput } from '../types.js';
export declare class ClientLite {
    private engine;
    private worker;
    constructor(engine: NativeEngine, worker: WorkerLite);
    /**
     * Start a new workflow execution.
     */
    start(input: StartWorkflowInput): Promise<{
        workflowId: string;
        runId: string;
    }>;
    /**
     * Send a signal to a running workflow.
     */
    signal(workflowId: string, signalName: string, payload?: any): Promise<void>;
    /**
     * Query a running workflow (read-only).
     */
    query<T>(workflowId: string, queryName: string): Promise<T>;
    /**
     * Wait for a workflow to complete and return its result.
     */
    getResult<T>(workflowId: string, _runId?: string, timeoutMs?: number): Promise<T>;
    /**
     * Cancel a running workflow.
     */
    cancel(workflowId: string, reason?: string): Promise<void>;
    /**
     * P6.5 — restart-from-step (operational time travel) has NO equivalent on
     * the embedded lite engine: fork is implemented server-side only
     * (`crates/server/src/grpc/workflow_service.rs`'s `ForkWorkflow` RPC,
     * backed by `Store::fork_workflow_run` on Postgres/MemoryStore). The lite
     * engine (`crates/engine`) has no such RPC and no plan to grow one in this
     * phase — rather than silently no-op or approximate it, this fails loudly
     * so a caller mixing lite + fork-dependent code finds out immediately,
     * not via a confusing missing side effect (Design Law 4 in spirit: never
     * swallow an unsupported operation into something that looks like
     * success).
     */
    fork(_workflowId: string, _runId: string, _stepSeq: number): Promise<ForkWorkflowResult>;
    /**
     * No-op — no connection to close.
     */
    close(): void;
}