How I built an Autonomous AI Second Brain using Node.js, Gemini, and Notion (as a High Schooler)

Hey everyone, I'm Vansh 👋 I'm a high school student by day and a web developer by night. I just finished my 11th-grade exams, and during my study prep, I realized a massive problem: my notes and tasks were a complete mess. Between juggling school subjects, coding projects, and random ideas, my information was scattered across five different apps. I was spending more time organizing my study materials than actually studying. So, instead of studying harder, I decided to code my way out of the problem. I built Axiom OS—an autonomous AI-powered Second Brain that connects Telegram, Google Gemini 2.5 Flash, and Notion. Here is a breakdown of how I built it and the architecture behind it. 🧠 What is Axiom OS? At its core, Axiom OS is a frictionless capture system. Instead of opening Notion, navigating to a page, formatting blocks, and typing out notes, I just text my private Telegram bot. Send a topic (e.g., "Photosynthesis") -> The bot asks Gemini to research it, formats it into structur