I Built an AI Co-Host That Fact-Checks Me in Real Time

I built a live AI sidebar that listens to any audio on your computer and gives you real-time fact checks and counter arguments while you talk. One chat session in Claude Code. Under an hour. Meet Gary and Rex. Gary is a fact checker who flags bad stats, wrong dates, and made-up company histories, with sources. Rex is a sharp skeptic who finds the strongest counter argument to anything you're saying. Both run live while you're on a call, a podcast, or watching a stream. The stack is a Node server and a single HTML file. Audio capture runs through the browser with getDisplayMedia, transcription goes through Deepgram, and every ~100 words gets sent to the Claude API with a sliding window of the last 1000 words plus a rolling summary, so the model always has full context on what's been discussed. All personas are just prompts. You can rewrite Gary and Rex right inside the settings page, live, no restart needed. The repo is fully open source. Drop in your Anthropic and Deepgram keys, run npm install and npm start, and you're live. Thank you to our exclusive sponsor: PayPal Open — One Platform for All Business: http://paypalopen.com/ 🔗 GitHub repo (open source): https://github.com/oliverklaunch/live-ai-sidebar ⏱️ Timestamps: 0:00 — What Sidebar does 0:19 — Meet Gary (fact checker) and Rex (devil's advocate) 0:40 — How it works: Node, Deepgram, Claude API 1:06 — Inside the settings page and system prompts 2:03 — How context works (the sliding window trick) 2:28 — Personas are just prompts, edit them live 3:13 — How I built this in one Claude Code session 3:42 — The build experience with Opus 4 and Claude Code 4:17 — Who this is actually useful for 4:31 — How to run it yourself 📌 Key Tips: 1. Add a sliding window of recent transcript plus a rolling summary, not just the latest chunk, or the model has no idea what topic you're on 2. Personas are system prompts. Swap them out for any voice you want npm install + npm start is all it takes once you clone the repo. #ClaudeCode #AITools #DeveloperTools #Anthropic #Deepgram #RealTimeAI #PodcastTools