export interface HostModuleBridgeInstallResult {
    installed: boolean;
    specifiers: string[];
}
export interface HostModuleBridgeBuilder {
    module(specifier: string, callback: () => {
        exports: object;
        loader: "object";
    }): HostModuleBridgeBuilder;
}
export interface HostModuleBridgePlugin {
    name: string;
    setup(build: HostModuleBridgeBuilder): void;
}
/**
 * Create the runtime plugin that exposes the host's existing module namespace
 * objects to external ESM bundles without evaluating a second package graph.
 */
export declare function createHostModuleBridgePlugin(modules: Record<string, object>): HostModuleBridgePlugin;
/** Register live host module objects before native builtin imports. */
export declare function installHostModuleBridge(): Promise<HostModuleBridgeInstallResult>;
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