export declare const DEV_UI_ASSET_PROVIDER_MISSING_MESSAGE = "Development UI assets are unavailable. Install and enable @veryfront/ext-dev-ui-react.";
export declare function createDevUiAssetsUnavailableResponse(): Response;
/** Preserve GET status and headers while enforcing the HTTP HEAD body contract. */
export declare function omitHeadResponseBody(req: Request, response: Response): Response;
/**
 * Serve one generation-captured bundle at one exact endpoint path. Origin and
 * host admission are enforced by the callers that gate the dev UI surfaces.
 */
export declare function serveDevUiBundle(req: Request, expectedPathname: string, browserBundle: string | undefined): Response | null;
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