# Vibe World

- **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:** [Paulo Ferraz](https://cerebralvalley.ai/u/poferraz)
- **GitHub:** https://github.com/poferraz/vibe-fence
- **Demo video:** https://www.youtube.com/@poferraz13
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3785

Vibe-fence helps people building with AI coding agents notice selected risky actions and Git changes. It runs local, pattern-based checks that can flag problems such as a browser-visible secret-shaped variable, then provides a practical next step. The checks are bounded: a clean result is not a security guarantee, and host enforcement depends on the integration.

In a synthetic rehearsal, Muse Code added a fictional secret-shaped reference to a page before Vibe-fence was installed. After the Muse Code hook was installed and a fresh trusted session started, the same edit was blocked and the page stayed unchanged. No real credential was used. This demonstrates one supported action, not coverage of every possible action.

I started with a personal scaffold containing research, adapter scaffolds, Git helpers, and preliminary rules. Work during October 27–November 4 included Git scanning, runtime and privacy hardening, and evaluation. On November 4 I added the native Muse Code hook and its tests, and fixed a secret-rule false negative. The provenance document distinguishes earlier work and dates; eligibility is for the organizers to determine.

The submitted Muse Code candidate is public at https://github.com/poferraz/vibe-fence/tree/7786dd286f0d450237004544c64bb0a43ede5e8f. It is on a pull request, so the repository's default branch may differ. Evidence: https://github.com/poferraz/vibe-fence/blob/7786dd286f0d450237004544c64bb0a43ede5e8f/docs/EVIDENCE.md. Provenance: https://github.com/poferraz/vibe-fence/blob/7786dd286f0d450237004544c64bb0a43ede5e8f/docs/BUILD-PROVENANCE.md.

## More from Meta Global AI Developer Hackathon

- [kaumnen](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3782)
- [Second Source](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3783)
- [Warden Automatons](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3784)
- [Agent Checkout Traps](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3786)
- [Scott Waldron](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3787)
- [Salomon AI](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3788)

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