Result
🥉 3rd place — Viveris Challenge
🏆 Nuit de L’Info 2025 — National French Hackathon
📊 267 teams competing simultaneously, ~1000 participants
The Challenge
Viveris’ challenge: build an innovative conversational agent with an original interface in 10 hours (sunset to sunrise).
Our answer: Jean-Michel Apeupréx — the Resistant Digital Druid, a deliberately absurd Gaulish character who advises villagers on resisting “Big Tech”, incarnated in a 3D animated character with synchronized lip movements.
What Made It Work
The secret wasn’t the code — it was containerizing everything at 9:30 PM before writing a single line of business logic.
4 Docker services. 1 docker-compose up. Everyone on the same environment in 60 seconds.
[Input text] → [OpenAI GPT-4o-mini] → [ElevenLabs TTS] → [Rhubarb Lip Sync] → [Three.js]Read the full infrastructure write-up → chatbot-3d-hackathon-viveris
Tech Stack
| Layer | Technology | Role |
|---|---|---|
| API | FastAPI (Python) | WebSocket server + orchestration |
| LLM | OpenAI (GPT-4o-mini) | Cloud inference, structured JSON output |
| TTS | ElevenLabs | High-quality French text-to-speech |
| Lip Sync | Rhubarb Lipsync | WAV → mouth cue JSON |
| 3D | Three.js + Blender | Character rendering + morphTargets |
| Deploy | Koyeb | Always-on container, no cold starts |
Team Name Reference
The team was named Morris II after the Morris Worm 2 paper — a nod to the cybersecurity culture within the team.