# Cantata

- **Event:** [Claude Build Day](https://cerebralvalley.ai/e/claude-startups-build-day)
- **When:** Sat, Jun 13 at 9:00 AM – 10:00 PM (PDT)
- **Where:** San Francisco, CA
- **Team:** [Jeffrey Podany](https://cerebralvalley.ai/u/Jeff_P)
- **GitHub:** https://github.com/gitoffmylibrary/VibeDeck_Claude_BuildDay2026
- **Website:** https://vibedeck-production.up.railway.app/
- **Demo video:** https://youtu.be/h6f7R8I516w
- **Gallery:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/18

Cantata lets one person run an engineering org by voice. Shout an idea and watch it become a running app on screen built by a fleet of Claude agents you command by talking, never touching the keyboard. Interrupt it mid-sentence and it stops and redirects like an employee; say "undo that" and it git-reverts; say "open what you built me this morning" and it remembers. A Sonnet concierge talks, an Opus 4.8 Director routes, and sandboxed, cost-capped workers build in parallel. Best of all, saying "stop" goes straight to the machines with no model in the loop. It was built and bug-checked by Opus 4.8 orchestrating itself.

JUDGE NOTE: The railway deployment is real but ephemeral, if you reload you lose it. It would normally be a local electron app that modifies files on your system.

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Markdown version of https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/18. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt