/**
 * Shared HTML attribute safety constants.
 *
 * Single source of truth for attribute allowlists and dangerous-URI patterns
 * used by sourceMutation (core), sdkCutover (studio), and mutate (sdk).
 */
export declare const ALLOWED_HTML_ATTRS: Set<string>;
export declare const URI_BEARING_ATTRS: Set<string>;
export declare const DANGEROUS_URI_SCHEMES: RegExp;
export declare const DANGEROUS_DATA_URI: RegExp;
export declare function isAllowedHtmlAttribute(name: string): boolean;
export declare function isSafeAttributeValue(name: string, value: string): boolean;
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