import { NestInterceptor, ExecutionContext, CallHandler } from '@nestjs/common';
import { Observable } from 'rxjs';
/**
 * Caching interceptor for feature flag responses.
 *
 * FLOW:
 * 1. Runs AFTER middleware attaches dynamic feature flags.
 * 2. Generates a cache key based on request URL and enabled flags.
 * 3. If a cached response exists for this combination, returns it immediately.
 * 4. Otherwise, calls the next handler and caches the response.
 */
export declare class Caching implements NestInterceptor {
    private cache;
    intercept(context: ExecutionContext, next: CallHandler): Observable<unknown>;
}
//# sourceMappingURL=caching.d.ts.map