/** Drop every memoised sibling-CSS read (including cached misses). The dev
 *  server calls this after rebuilding page bundles: a request landing
 *  mid-rebuild can otherwise cache '' for a freshly hashed path whose
 *  sidecar hasn't been copied yet, and that page then SSRs unstyled for the
 *  rest of the process. Prod never needs this — hashed artifacts are
 *  immutable there. */
export declare const clearSiblingCssCache: () => void;
export declare const injectInlineCss: <T extends string>(headTag: T, css: string) => T;
export declare const readSiblingCss: (siblingJsPath: string | undefined) => Promise<string>;