import { type LegacyCommandContext, type SmartCommand, type SmartEditorState, type LegacySmartTransaction } from "smartrte-core/legacy";
export interface ShadowComparison {
    commandId: string;
    matches: boolean;
    legacyHtml: string;
    coreHtml: string;
}
export declare const isShadowModeEnabled: () => boolean;
/** Compares canonicalized HTML only; it never changes editor state or output. */
export declare const compareShadowHtml: (commandId: string, legacyHtml: string, coreHtml: string) => ShadowComparison;
export declare const reportShadowDifference: (comparison: ShadowComparison) => void;
/**
 * Executes a core command in memory for diagnostics. The caller owns the
 * legacy output; this helper never persists or applies the core result.
 */
export declare const runShadowCommand: <Input>(args: {
    command: SmartCommand<Input>;
    context: LegacyCommandContext;
    input?: Input;
    state: SmartEditorState;
    legacyHtml: string;
    serialize: (state: SmartEditorState) => string;
}) => LegacySmartTransaction | null;