import type { Plugin } from 'vite';
/** Options for {@link writeIfChanged}. */
export interface WriteIfChangedPluginOptions {
    /**
     * Output directory to resolve emitted chunk file names against. Only
     * consulted when Rollup's own `output.dir` isn't set on the build.
     */
    readonly outDir?: string;
}
/**
 * Vite plugin that only writes bundle files if content changed, avoiding
 * file-watcher/HMR churn on a byte-identical rebuild. Uses `writeBundle`
 * not `generateBundle`: Rolldown can't mutate the bundle, so the write
 * happens after Rollup's own write step.
 */
export declare function writeIfChanged(options?: WriteIfChangedPluginOptions): Plugin;