# Mike

- **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
- **Placement:** 1st Place
- **Team:** [Mike Brown](https://cerebralvalley.ai/u/brz)
- **GitHub:** https://github.com/mikeOnBreeze/cc-crossbeam
- **Demo video:** https://youtu.be/jHwBkFSvyk0
- **Gallery:** https://cerebralvalley.ai/e/claude-code-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/claude-code-hackathon/hackathon/gallery/54

CrossBeam tackles California's ADU permit crisis. 429,000+ permits issued since 2018, 90%+ sent back for corrections — each cycle costing weeks and thousands of dollars.

Upload your corrections letter and construction plans. CrossBeam reads blueprints using vision, interprets every correction with code citations, cross-references state and city law via live web research, and drafts a response package ready for your engineer to sign.

Built on the Claude Agents SDK with 13 custom skills covering state ADU law, city-level research, blueprint extraction, and corrections interpretation — all running concurrently.

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