# Holo The Rapper

- **Event:** [Built with Opus 4.7: a Claude Code hackathon](https://cerebralvalley.ai/e/built-with-4-7-hackathon)
- **When:** Apr 21 at 12:00 PM – Apr 27 at 2:00 AM (EDT)
- **Where:** Online
- **Team:** [Holo The Rapper](https://cerebralvalley.ai/u/holotherapper)
- **GitHub:** https://github.com/holotherapper/yume
- **Demo video:** https://youtu.be/WrKzfGpugiM?si=4_RMF7d9Un5NuqRj
- **Gallery:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/81

YUME is a social simulation where Claude Managed Agents live as residents of a city. Each resident has its own independent agent session and persistent memory. No instructions are given to the agents. They receive only the state of the world — buildings, nearby people, their own health, finances, stress — and reason autonomously about what to do. This architecture makes the simulation genuinely realistic.

Under the hood, YUME implements per-resident asymmetric relationship models, an independent evaluation step that scores each interaction, seed-based reproducible probabilistic events, and parallel synchronization orchestration across all agents — a structure that cannot be achieved with a single prompt.

Change the city layout, swap in different residents, or alter the scenario, and an entirely different society emerges. Urban planning, policy testing, social experiments — whatever the question, YUME answers it by simulating the whole city.

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Markdown version of https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/81. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt