codewrhp.hashnode.devAgent Handoff vs Agent as Manager: Building Smarter Multi-Agent Systems in OpenAI Agents🚀 Introduction With the rise of AI orchestration frameworks like OpenAI Agents, developers can now build multi-agent systems that collaborate intelligently.Instead of one massive AI model doing everything, you can design multiple specialized agents ...Nov 12, 2025·4 min read
codewrhp.hashnode.devInterfaces vs Abstract Classes in Java: Simple Guide with Real-World Examples🔑 What is an Interface in Java? Think of an interface as a contract. It says:👉 “If you want to be this type, you must do these things.” It only defines what needs to be done, not how. Classes that use it must provide their own implementation. A ...Sep 27, 2025·4 min read
codewrhp.hashnode.devSystem Design of a Notification System (Explained with Diagram)Notifications are everywhere — from a welcome email when you sign up, to in-app messages reminding you about updates, to push notifications on your phone. Designing a reliable notification system is a critical part of any scalable application. In thi...Aug 30, 2025·5 min read
codewrhp.hashnode.devSystem Designing Sub-Query RAG PipelineEver asked a chatbot a complex question and got a half-baked answer?That’s because your single query didn’t give the AI enough angles to explore. 👉 Enter the Sub-Query RAG Pipeline — a smarter approach that splits one messy query into multiple small...Aug 26, 2025·3 min read
codewrhp.hashnode.devSystem Designing Corrective RAG PipelineHave you ever typed something wrong into Google or ChatGPT and still got the answer you were looking for?That’s because behind the scenes, smart systems fix your messy queries before searching. This is exactly what a Corrective RAG (Retrieval-Augment...Aug 26, 2025·3 min read
