# VariantCut

- **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:** [Rahul Thomas Mathew](https://cerebralvalley.ai/u/Kaali)
- **GitHub:** https://github.com/rahulthms-art/VariantCut
- **Demo video:** https://youtu.be/9C61bmDq1GQ
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1069

VariantCut tells a car maker which versions of a model to stop selling: the powertrain variants that cost around €30M each over their life but sell only a few hundred cars a year. Today these calls are mostly made on volume alone.

A team of Muse Spark agents works only on public data (Dutch RDW registrations with list prices, and the EEA CO2 monitoring dataset, 2019–2025):
• Analyst scores every version through as-of tools on anonymised data (hashed names, power and price rounded), so it can't see the future or recognise the car.
• Critic checks each proposed cut against binding rules (the group's fleet CO2 budget, last version of a fuel, cheapest way into the model, still ramping up) and debates the Analyst over three rounds.
• Substitution, learned from 162 Dutch discontinuations, says where buyers go. Finance prices every cut with a cited cost model and the EU CO2 penalty.
• Muse Spark writes a one-page board memo.

Tested like a forecaster: calls made with 2022 data, checked against what makers really dropped by 2025. Cutting the smallest versions is right 40% of the time; the full team 52%. On held-out years (2019 → 2022) it is 68% vs 57%. A recognition probe shows the edge is larger on cars Muse Spark could not name: the gain comes from reasoning, not memory. A Live view applies the team to 2025 data, with an early check against 2026 Dutch registrations.

Demo: https://rahulthms-art.github.io/VariantCut/

## More from Meta Global AI Developer Hackathon

- [Anytime Lab](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1066)
- [Adiyan-Wayfinder](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1067)
- [Amitech](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1068)
- [BlackboxAI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1070)
- [Manual for Anything](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1071)
- [Creative Director Agent](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1072)

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Markdown version of https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/1069. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt