Building a Real-Time Gamified Posture AI with the Vision Agents SDK ⚔️🪑

A solo developer’s weekend hackathon journey building PosturePaladin using modern AI and WebRTC. If you’ve ever tried piping live webcam video through a computer vision model and then streaming the modified output back into a live video call, you know it’s usually a weekend-ruining nightmare of WebRTC connection drops, mismatched frame rates, and mysterious asynchronous blocking errors. This weekend, I decided to tackle exactly that problem. My goal was to build PosturePaladin —a gamified, real-time AI "desk guardian" that overlays an RPG-style Heads-Up Display (HUD) directly onto your Zoom/Stream video calls to track your posture and yell at you if you slouch. To pull this off quickly as a solo builder, I turned to the Vision Agents SDK . Here’s what I learned, what worked brilliantly, and how I navigated the sharp edges of building multi-modal AI agents. The Problem: Notification Fatigue We all know we have terrible posture. We’ve all installed an app that sends us a push notificatio