/**
 * Pure brand-signal extraction from a website's HTML.
 *
 * Shared by the `analyze-brand-assets` action across templates. DB-agnostic and
 * framework-agnostic: it only fetches (through the SSRF-safe helper) and parses
 * HTML. The DB access (resolving an existing Brand Kit) stays in the template's
 * thin action wrapper.
 */
import type { BrandWebsiteSignals } from "./types.js";
/**
 * Normalize a user-supplied brand website URL: add an `https://` scheme when
 * missing and reject anything that isn't http(s). Throws on empty input or an
 * unsupported scheme.
 */
export declare function normalizeBrandWebsiteUrl(input: string): string;
/**
 * Parse brand signals out of a page's HTML: meta theme-color, CSS custom
 * properties (capped), @font-face declarations (capped), title, and meta
 * description. Pure — no network. The provided `url` is echoed back.
 */
export declare function extractBrandSignalsFromHtml(html: string, url: string): BrandWebsiteSignals;
/**
 * Fetch a brand website (SSRF-safe) and extract its brand signals. Returns the
 * parsed signals, or an `{ url, error }` shape if the fetch/parse fails — the
 * caller decides how to surface that to the agent.
 */
export declare function fetchBrandWebsiteSignals(websiteUrl: string): Promise<BrandWebsiteSignals | {
    url: string;
    error: string;
}>;
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