/**
 * Remote runtime synchronization (3.0.0 cross-host bridge).
 *
 * Transfers the content-addressed runtime bundle to a remote target's
 * user-scoped cache, verifies the tarball hash, atomically materialises the
 * runtime directory, and returns the authoritative remote CLI entry. A cache
 * hit (same runtimeId + commit + tarball hash) skips the transfer entirely.
 *
 * No legacy fallback: if the required runtime cannot be synchronised and
 * verified, sync throws and the caller must fail closed.
 */
import type { RemoteExecutionTarget } from "./remote-target-types.js";
import { type BuiltRuntimeBundle } from "./runtime-bundle.js";
import { type SshRemoteExecutionTransport } from "./ssh-transport.js";
export interface RemoteRuntimeSyncOptions {
    transport: SshRemoteExecutionTransport;
    target: RemoteExecutionTarget;
    /** Remote user-scoped cache root (e.g. `%LOCALAPPDATA%\Jensen\runtimes`). */
    cacheRoot: string;
    bundle: BuiltRuntimeBundle;
    now?: () => number;
}
export interface SyncedRemoteRuntime {
    runtimeId: string;
    remoteRoot: string;
    cliEntry: string;
    jensenCommit: string;
    tarballHash: string;
    alreadyPresent: boolean;
}
export declare class RemoteRuntimeSyncError extends Error {
    readonly code: "REMOTE_RUNTIME_HASH_MISMATCH" | "REMOTE_RUNTIME_INCOMPATIBLE" | "REMOTE_RUNTIME_SYNC_FAILED";
    constructor(code: RemoteRuntimeSyncError["code"], message: string);
}
/**
 * Synchronise the bundle onto the target and return the remote runtime entry.
 * Idempotent: a verified cache hit returns without retransmitting.
 */
export declare function syncRemoteRuntime(options: RemoteRuntimeSyncOptions): Promise<SyncedRemoteRuntime>;
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