# Plumb

- **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:** [Usman Ayobami](https://cerebralvalley.ai/u/ayobamiu)
- **GitHub:** https://github.com/Ayobamiu/plumb
- **Demo video:** https://youtu.be/JduC8S4Yi50
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/496

I plan in Claude Desktop, build in Claude Code and do the UI in Cursor. None of them knows what the others did, and what they remember goes stale. Four days after I got into this hackathon, my coding agent told me my top task was to submit my application.

Plumb keeps one memory across your AI tools and keeps it true on its own. Every claim is stored with the reasons it holds. When an email, a doc edit or another session breaks a reason, plain code marks the claim false and follows the chain to everything built on it. Type /plumb in any tool and you get the corrected state, with a one-line reason for each change.

The model suggests, code decides. On 24 test scenarios, Plumb caught 96% of stale claims and wrongly marked 0 of 166 true claims false. Muse Spark on its own caught 81% and got 5.9% wrong.

Everything was built during the hackathon. The first commit is Oct 26, after kickoff, and the full history is public. It’s live: try it with npx plumb-ai init.

## More from Meta Global AI Developer Hackathon

- [zhalpakov](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/493)
- [Kuron Universe](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/494)
- [Savy Electrical](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/495)
- [Vertalt](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/497)
- [Missing Monday](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/498)
- [LuffyDevs](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/499)

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