# Cactus Sentinel

- **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:** [Ahamed Fahim](https://cerebralvalley.ai/u/iaf), [Nafis Forkan](https://cerebralvalley.ai/u/echo20)
- **GitHub:** https://github.com/echo2045/CactusTest1
- **Demo video:** https://www.youtube.com/watch?v=Hd1TjFZEGpo
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2277

Sentinel is a stealth game you play with your voice — and can play with your eyes closed. Say "run to the chest", the hero moves, a giant eye watches. Blind and low-vision players get a version with spoken guidance and audio cues instead of a screen.

Everything runs on the player's own machine: no cloud, no GPU, no per-request cost, and no audio ever leaves the device.

Meta's models are the teacher in the teacher–student recipe behind the two models that run the game — Needle 3 for turning speech into typed tool calls, Whistle for speech-to-text. We wrote the missing piece: a zero-allocation C# inference engine that runs them inside a 60 Hz Unity game loop (faster than the vendor's native C++ engine, 660 parity tests), plus the game, the voice-first menu and the Unity package. Meta's coding agent built it with us.

## More from Meta Global AI Developer Hackathon

- [Saad](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2274)
- [ZeroHP](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2275)
- [DataBridge AI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2276)
- [KLI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2278)
- [WEB NOVAS](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2279)
- [MainsMirror](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2280)

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Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/2277. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt