# Henk van Ess (solo)

- **Event:** [Built with Opus 4.6: a Claude Code hackathon](https://cerebralvalley.ai/e/claude-code-hackathon)
- **When:** Feb 10 at 12:00 PM – Feb 17 at 10:00 AM (EST)
- **Where:** Location TBA
- **Team:** [Henk van ess](https://cerebralvalley.ai/u/henkvaness)
- **GitHub:** https://github.com/voelspriet/flipside
- **Demo video:** https://vimeo.com/1165331217
- **Gallery:** https://cerebralvalley.ai/e/claude-code-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/claude-code-hackathon/hackathon/gallery/60

Gym memberships, app terms, pet adoptions, sweepstakes — the things you sign with a shrug. They weren't written with one. FlipSide treats a $2
   coupon with the same seriousness as a $500,000 corporate lease. Existing legal tech targets lawyers. Try finding one that handles gym        
  memberships or sweepstakes. Upload any document or pick from 14 samples. Flip cards: the front shows what the drafter wants you to feel. Flip
  it to see what an expert catches. Risk scores, trick types, dollar figures. Why Opus 4.6? Haiku builds cards fast and parallel. The verdict
  needs Opus: cross-clause reasoning connecting a liability waiver on page 2 to an arbitration clause on page 8, and theory of mind that
  reconstructs drafter intent. Millions sign one-sided documents without seeing the other side. Now they can. 0% human code. 14,000+ lines built
   through conversation with Claude Code. 116 commits. 6 days.

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