export interface TrailingSlashOptions {
    /** Redirect (default) or route internally with a rewritten URL. */
    readonly mode?: "redirect" | "rewrite";
    /** Redirect status. Default `308` (method-preserving permanent redirect). */
    readonly status?: 301 | 302 | 307 | 308;
    /** Methods affected. Default `["GET", "HEAD"]`; add write methods only when you want 308 redirects. */
    readonly methods?: readonly string[];
    /** Skip paths whose last segment looks like a file (`/app.css`). Default `true` for append mode. */
    readonly ignoreFileExtensions?: boolean;
    /** App-specific skip predicate. */
    readonly ignore?: (path: string, request: Request) => boolean;
}
/**
 * Remove trailing slashes from non-root paths. Redirect mode is the production default because it
 * canonicalizes URLs for clients and caches; rewrite mode is available for compatibility migrations.
 */
export declare function trimTrailingSlash(options?: TrailingSlashOptions): import("@nifrajs/core").IdentityPlugin<never>;
/**
 * Append a trailing slash to non-root paths. By default it skips file-looking paths such as
 * `/app.css`, which keeps static assets and extensionful API routes stable.
 */
export declare function appendTrailingSlash(options?: TrailingSlashOptions): import("@nifrajs/core").IdentityPlugin<never>;
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