# WorldLine

- **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:** [Murad Huseynli](https://cerebralvalley.ai/u/Zenden)
- **GitHub:** https://github.com/Murad-Huseynli/claude-build-day
- **Website:** https://claude-build-day-alpha.vercel.app
- **Demo video:** https://youtu.be/2jSkWQZ-EOE
- **Gallery:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/125

WorldLine is counterfactual debugging + institutional memory for multi-agent AI reliability.

When an agent pipeline returns the wrong answer, WorldLine has Claude intervention-test every decision in parallel — forking the run, injecting a counterfactual, and re-simulating the downstream live — to find the decision that actually CAUSED the failure, ruling out plausible decoys (even the last-touch agent that looks guilty). It then authors a repair and proves it flips the outcome with a deterministic code assertion.

Every verified fix becomes a durable lesson in a fleet knowledge graph. A different agent about to repeat the same failure class — even worded differently — is caught and fixed pre-emptively, and a pre-ship CI gate blocks any change that would reintroduce a known failure.

Tracing shows what happened. WorldLine finds the cause, proves the fix, and makes your agent fleet stop repeating itself.

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Markdown version of https://cerebralvalley.ai/e/claude-startups-build-day/hackathon/gallery/125. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt