--- title: "Sumit Vishwkarma (@sumitwrites) | Hashnode" description: "SUDO is writing. Read the latest articles by Sumit Vishwkarma on Hashnode." url: "https://hashnode.com/@sumitwrites" --- @sumitwrites # Sumit Vishwkarma @sumitwrites · Joined January 2026 SUDO is writing ### [Where RAG Fails: Understanding Its Limitations](https://sudotech.hashnode.dev/rag-fails?utm_source=hashnode&utm_medium=feed) Retrieval Augmented Generation is one of the biggest breakthroughs in making AI more useful. But it is not magic. Let's understand where it shines, where it struggles, and why simply adding RAG does n 8 min read · [sudotech.hashnode.dev](https://sudotech.hashnode.dev/rag-fails?utm_source=hashnode&utm_medium=feed) [Jul 19](https://hashnode.com/posts/rag-fails/6a5cdc3b8ded8a45fbf4ff3e) ### [How does your AI Girlfriend respond?](https://sudotech.hashnode.dev/she-is-ai?utm_source=hashnode&utm_medium=feed) I know , and I'll let you know as well 10 min read · [sudotech.hashnode.dev](https://sudotech.hashnode.dev/she-is-ai?utm_source=hashnode&utm_medium=feed) [Jul 1](https://hashnode.com/posts/she-is-ai/6a453129166894446a915480) ### [THE ONLY DEPLOYMENT GUIDE YOU NEED](https://sudotech.hashnode.dev/deployment?utm_source=hashnode&utm_medium=feed) End-to-end deployment with example 29 min read · [sudotech.hashnode.dev](https://sudotech.hashnode.dev/deployment?utm_source=hashnode&utm_medium=feed) [Jun 6](https://hashnode.com/posts/deployment/6a245b8dd58fd40c3a48310f) ### [Expo Router vs React Navigation: Which One Should You Use in 2026?](https://sudotech.hashnode.dev/expo-router-vs-react-navigation-which-one-should-you-use-in-2026?utm_source=hashnode&utm_medium=feed) If you've built a React Native application recently, you've probably encountered this question: Should I use React Navigation or Expo Router? For years, React Navigation has been the standard naviga 6 min read · [sudotech.hashnode.dev](https://sudotech.hashnode.dev/expo-router-vs-react-navigation-which-one-should-you-use-in-2026?utm_source=hashnode&utm_medium=feed) [May 23](https://hashnode.com/posts/expo-router-vs-react-navigation-which-one-should-you-use-in-2026/6a10ef491f237623ea46bbd3) ### [How Instagram, WhatsApp, Uber & Netflix Would Be Built Today Using Expo Router](https://sudotech.hashnode.dev/how-instagram-whatsapp-uber-netflix-would-be-built-today-using-expo-router?utm_source=hashnode&utm_medium=feed) Modern mobile applications are far more than a collection of screens connected together. Apps like Instagram, WhatsApp, Uber, and Netflix handle millions of users, realtime updates, offline access, au 5 min read · [sudotech.hashnode.dev](https://sudotech.hashnode.dev/how-instagram-whatsapp-uber-netflix-would-be-built-today-using-expo-router?utm_source=hashnode&utm_medium=feed) [May 23](https://hashnode.com/posts/how-instagram-whatsapp-uber-netflix-would-be-built-today-using-expo-router/6a10ee441f237623ea463d77)