# COSINT

- **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:** [Ryan Ni](https://cerebralvalley.ai/u/ryanxani), [Praneel Patel](https://cerebralvalley.ai/u/praneelp)
- **GitHub:** https://github.com/ryunzz/cosint
- **Website:** https://cosint-production.up.railway.app/
- **Demo video:** https://youtu.be/J-e9ZzG7UrM
- **Gallery:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/119

COSINT is a real-time "situation room" for US missing-person investigations. You drop in a person's photos and notes, and a swarm of Claude agents works the case from **public open-source intelligence** — it finds existing tools, builds MCPs or skills to interface with them, and uses the tools to crack cases. EXIF + vision-based photo geolocation, reverse-image search, advanced-search "dorks," people/phone/social lookups, and supervised browser computer-use, surfacing **cited, actionable leads** on a live map. Every claim links to a real public source that otherwise takes weeks to find due to our context layer. 

The problem: OSINT on a missing person is slow, manual, and hard to audit. Investigators and family advocates need *corroborated* leads with provenance, fast — and need to actually watch the work happen. COSINT makes the investigation parallel, watchable, and verifiable: a fleet of agents runs concurrently, each tool call streams into the cockpit live, and the geography lights up as findings land. It's demo-mode-first (boots and replays a full investigation with zero API keys), so anyone can see it work instantly.

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Markdown version of https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/119. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt