I Built Shree AI OS — A Deterministic AI Runtime for Java 21 A developer released the Developer Preview of Shree AI OS, a Java-first AI runtime for embedding memory, planning, reasoning, and hybrid retrieval directly into Java 21 backend applications. The project routes every request through an explainable cognitive pipeline rather than calling an LLM directly, and ships with an official documentation site built on Next.js 16, React 19, Tailwind CSS 4, and Framer Motion. The developer is soliciting feedback from Java and backend engineers. After several months of development, I'm releasing the Developer Preview of Shree AI OS , a Java-first AI runtime designed for building intelligent backend applications. Most AI frameworks focus on chatbots. My goal was different: create a reusable runtime that developers can embed directly into Java applications with memory, planning, reasoning, and hybrid retrieval. While building Spring Boot applications, I found that adding AI often meant stitching together multiple services. I wanted a deterministic runtime that provides: The platform follows a layered architecture: Every request flows through an explainable cognitive pipeline instead of directly calling an LLM. I also built an official documentation website using Next.js 16 , React 19 , Tailwind CSS 4 , and Framer Motion . It includes: This is still a Developer Preview , and I'd love feedback from Java and backend developers. GitHub: github.com/darshanrathod04/shree-ai-os Website: shree-ai-os.netlify.app Thanks for reading