AI Debate Chatbot
Two-player debate game with real-time AppSync sync, 3 rounds of AI-generated questions, and a final scored judgment from an LLM.
About this project
Two players join a shared room by code, submit opening positions, answer three rounds of Groq-generated debate questions on a server-synced timer, then receive a structured judgment scoring each side on Matter, Manner, and Method. All room state lives in DynamoDB and propagates via AppSync GraphQL subscriptions, so both browsers stay in sync without polling. The most interesting decisions were making the round timer drive off a server timestamp (so refresh and reconnect don't desync) and electing Player A's client as the only one that calls Groq — that single-caller pattern avoids duplicate LLM requests and race conditions in the round-progression logic.
- AppSync GraphQL with @aws_subscribe WebSocket subscriptions — no polling, no Socket.IO
- Server-synced round timer via DynamoDB `roundStartedAt` so both clients share one clock
- Custom 'present()' merge helper to handle AppSync's null-means-unchanged update semantics
- Server-side /api/groq proxy keeps the API key out of the browser
Key features
Two-player rooms
Join with 6-char code, sides A/B
Real-time sync
AppSync WebSocket subscriptions
LLM-driven
Groq generates questions + judgment
Matter / Manner / Method
Structured 3-axis scoring
Screenshots
Active debate room
Result page
Debate History
Tech stack
Other projects
Real-Time Chat with Socket Programming
Socket.IO chat app with personal DMs, group rooms, and a Groq-powered AI assistant tab — all over one WebSocket connection.
Event Reservation Platform
Full-stack event booking app with JWT + Google OAuth login, SCB Sandbox QR payment, and Resend email confirmation.