# Substrate

- **Event:** [The Agentic Evolution Hackathon](https://cerebralvalley.ai/e/mongo-db-london-hackathon)
- **When:** Sat, May 2 at 9:00 AM – 9:00 PM (GMT+1)
- **Where:** CodeNode, London, United Kingdom
- **Placement:** Finalist
- **Team:** [Nicole Jiang](https://cerebralvalley.ai/u/Nicoco), [Mohammed Talab](https://cerebralvalley.ai/u/Mohi), [Aswin Giridhar](https://cerebralvalley.ai/u/Aswinsson), [Claude Corin](https://cerebralvalley.ai/u/Claudebz)
- **GitHub:** https://github.com/aswin-giridhar/mongodb_agentic_evolution
- **Demo video:** https://www.loom.com/share/261bd7da587a4bc896ab8acc7ba1b9a1
- **Gallery:** https://cerebralvalley.ai/e/mongo-db-london-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/mongo-db-london-hackathon/hackathon/gallery/18

Substrate is a shared memory layer for AI agents working on engineering projects. It captures the work-in-flight context, drafts, decisions, claims, open questions, that lives between commits and never makes it into GitHub, Slack, or a CLAUDE.md, so agents working in parallel converge through shared working memory instead of diverging on merge. Built on MongoDB Atlas with $graphLookup and Vector Search composed in a single aggregation, exposed to any agent via MCP.

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Markdown version of https://cerebralvalley.ai/e/mongo-db-london-hackathon/hackathon/gallery/18. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt