/** Closed icon vocabulary: the formats a browser accepts as `rel="icon"`. */
export declare const WEB_ICON_TYPES: ReadonlyMap<string, string>;
/**
 * The media type of a `web.icon` path, or null when its extension is outside
 * the closed set. Manifest validation and the emitted `<link rel="icon">` read
 * an icon's type through this one function, so the two can never disagree.
 */
export declare function webIconType(icon: string): string | null;
export interface VelarWebConfig {
    readonly title: string;
    readonly base: string;
    /** A `publicDir`-relative icon path, or null to emit the blank default. */
    readonly icon: string | null;
    readonly publicConfig: Readonly<Record<string, unknown>>;
    readonly security: {
        readonly contentSecurityPolicy: boolean;
        readonly connectSources: readonly string[];
        readonly imageSources: readonly string[];
    };
    readonly deployment: {
        readonly spaFallback: boolean;
    };
}
export declare const velarProjectExtension: Readonly<{
    id: "@velarscript/web";
    manifestKey: "web";
    parse(value: unknown, manifestPath: string): VelarWebConfig;
}>;
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