# Claude Code Hackathon — Close the Books

Source: https://aihackclub.com/hackathon/claude-code-hackathon-close-the-books-2026-11/
Official page: https://lu.ma/claude-kggz

- When: Saturday 7 November 2026, 21:00
- Where: La Nave, Madrid
- Host: Claude Community Events
- Entry: free

One-day Claude Code Build Day on building an autonomous finance office.
Challenge and dataset designed by Talky, AI for accounting.
The challenge: Build an AI finance team, then let it close the books
Every team gets the same synthetic multi-entity company: invoices, POs, bank transactions, contracts, vendor data, general ledger and ERP history. Your job is to turn that mess into a safe, traceable, audit-ready close with as little human intervention as possible.
A live leaderboard scores accounting accuracy, reconciliation, fraud detection, safe autonomy and auditability, and a hidden benchmark decides the final. Duplicates, tax errors and suspicious bank changes included.
When: Saturday, November 7 at 09:00 → 21:00Where: La Nave, Madrid.Capacity expected is ~30 seats.
Notes
Food & drinks will be provided throughout the day

Bring your own laptop

Application review is on a personal basis, not team basis. You will be put in teams