Inspiration
Modern LLMs hide societal biases behind strong RLHF alignment. We wanted to create a system that removes that mask and reveals what the models really learned from internet-scale data. Inspired by multi-agent collaboration, Shadow Society turns Qwen agents into a digital society that debates under pressure.
What it does
Shadow Society is a multi-agent debate platform using Qwen models. Users select a gray-area ethical topic and run simulations in two modes:
- Mirror Mode: Normal, aligned behavior.
- Shadow Mode: Agents compete with “win-at-all-cost” rewards to expose hidden societal biases.
Features include live visualization of debates, public influence via mutations, and direct comparison across Qwen versions. Everything is shown in real-time with polarization, audience growth, and moral decay metrics.
How we built it
- Backend (NestJS): REST API + SSE + WebSocket (NestJS + Socket.io) for real-time updates. Qwen Cloud API handles all model calls. Custom reward engine and mutation logic implemented in services.
- Frontend (Next.js): App Router + Server Components. Real-time visualization with Three.js. Tailwind for clean UI. WebSocket client for live debate updates.
- Core: Mirror vs Shadow modes controlled by a simple toggle. Mutation system allows the Public agent to influence agents dynamically.
Challenges we ran into
- Managing real-time synchronization between NestJS backend and Next.js frontend without lag.
- Handling high refusal rates in Shadow Mode and turning them into meaningful alerts.
- Optimizing LangGraph workflows to keep latency acceptable during multi-round debates.
- Designing fair and visually clear metrics (Societal Reveal Index & Moral Decay).
Accomplishments that we're proud of
- Fully functional Mirror vs Shadow system with live audience mutations.
- Successful bias revelation and measurable differences across Qwen versions.
- Clean, responsive UI in Next.js that explains the complex concept in seconds.
- Solid full-stack architecture (NestJS + Next.js) ready for scaling.
What we learned
- RLHF is very robust — models resist immoral wins more than expected.
- Multi-agent debates amplify latent biases under reward pressure.
- Real-time visualization is key to making AI agent systems understandable.
- Comparing models within the same family (Qwen) gives richer insights than cross-provider tests.
What's next for Shadow Society
- Add support for more Qwen versions and multimodal agents.
- Implement persistent memory and evolving agent personas.
- Deploy a public demo and open-source the NestJS + Next.js codebase.
- Explore applications in bias auditing, AI alignment research, and education.
Built With
- nestjs
- nextjs
- node.js
- qwen
- react
- three.js
- typescript

Log in or sign up for Devpost to join the conversation.