# Songjie Huang

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Songjie Huang](https://cerebralvalley.ai/u/sjh2026)
- **GitHub:** https://github.com/skjdfgbeh/Alternate-Worlds
- **Demo video:** https://youtu.be/6vBHm-IixzQ
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3463

Alternate Worlds is a history simulator for what-if questions. Other apps turn a prompt into a video; we build the world first.

Ask any what-if, such as “What if the Romans had the steam engine?” Meta’s Muse Wonder locks in exactly one change and what it doesn’t bring: new capabilities, not knowledge of the future. Then it maps the question into angles to explore.

The world: a research agent gathers real-history facts with sources, and Muse Wonder names the theories, from textbook economics to frontier research. We wrote eight of those theories as small models in code, so an episode can compute its own numbers. A second lab’s model fact-checks the claims, and the script may cite only verified ones.

The alternate: an invented rule can run through one of those models, and scenes are labelled real history, our model or imagined.

Each answer becomes a narrated episode of about two minutes, illustrated by Muse Image. Follow-up questions stay in the same world; changing one rule starts a new world. A gallery adds nine short films, three of them made start to finish by Meta models.

## More from Meta Global AI Developer Hackathon

- [Mihiretu (Didymos) Likassa](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3460)
- [TradePulse AI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3461)
- [Zero Echelon - Uplink](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3462)
- [Kurta Squad](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3464)
- [pritomash](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3465)
- [Chairwise](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3466)

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