export interface ProdHydrationModuleSelectionOptions {
    fs: {
        readDir(path: string): AsyncIterable<{
            name: string;
            isFile: boolean;
        }>;
    };
    projectDir: string;
    buildOutDir?: string;
    releaseId?: string;
}
/** Whether the release ID names an immutable artifact set rather than local source serving. */
export declare function hasImmutableReleaseHydrationRuntime(releaseId: string | undefined): releaseId is string;
/**
 * Select the hydration runtime owned by the rendered artifact set.
 *
 * Non-release renders use the serving runtime. Release renders discover the
 * single content-addressed runtime baked into that immutable release.
 * Releases without any versioned runtime fall back to the serving runtime at
 * its unversioned rollout-stable path: hosted release file trees carry no
 * build output at all (the API-backed fs lists the absent dist directory as
 * empty), so failing closed here takes down every hosted release render, and
 * a content-addressed fallback URL 404s on peer pods mid-rollout. Only
 * ambiguity — multiple versioned runtimes — and uninspectable release
 * artifacts fail closed.
 */
export declare function resolveProdHydrationModulePath(options: ProdHydrationModuleSelectionOptions): Promise<string>;
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