# SNAPSCRIBE

- **Event:** [Built with Opus 4.7: a Claude Code hackathon](https://cerebralvalley.ai/e/built-with-4-7-hackathon)
- **When:** Apr 21 at 12:00 PM – Apr 27 at 2:00 AM (EDT)
- **Where:** Online
- **Team:** [Francisco Cordoba](https://cerebralvalley.ai/u/fcordobaot)
- **GitHub:** https://github.com/franciscocordobaotalora/truth-seeker-cv
- **Demo video:** https://www.youtube.com/watch?v=TL_hY98LMls
- **Gallery:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/83

Lawyers and researchers lose careers when AI-fabricated citations slip into their published work. On April 18, 2026, Sullivan & Cromwell apologized to a federal judge for filing five  fake AI-generated case citations. GPTZero scanned 4,841 NeurIPS 2025 papers and found 100 fabricated citations across 53 of them, surviving review by 3 to 5 expert researchers each.     
  
  Truth Seeker catches every fake citation in any document before it ships. Stage 0 is a deterministic check across eight registries (CourtListener, CrossRef, DataCite, OpenAlex, Semantic 
  Scholar, DBLP, arXiv, PubMed) — 800 ms, zero LLM calls. Stage 1 is a Claude Opus 4.7 agent on Anthropic's Managed Agents platform that reads the document with the native PDF skill,
  fetches every primary source into a single 1M-token window, and grades every claim against what's actually there. Stage 2 (Panel of the Dead) runs five Opus 4.7 personas in parallel for adversarial verification.

  Reproduced live on the actual Sullivan & Cromwell filing: 53 verdicts in 24 minutes for $7. All five admitted fabrications caught, 14 more they hadn't noticed, zero false positives on   
  the corrected version. Apache 2.0, calibration-tested, MCP server included.

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Markdown version of https://cerebralvalley.ai/e/built-with-4-7-hackathon/hackathon/gallery/83. Site index for agents: https://cerebralvalley.ai/llms.txt · full text: https://cerebralvalley.ai/llms-full.txt