gnubok

Open-source Swedish accounting software for sole traders (enskild firma) and limited companies (aktiebolag).

What is gnubok?

gnubok implements double-entry bookkeeping compliant with Swedish accounting law (Bokforingslagen). It supports the BAS 2026 chart of accounts, handles VAT declarations (momsdeklaration), SIE import/export, and enforces 7-year document retention. Built for sole traders and limited companies operating in Sweden.

Features

• Double-entry bookkeeping -- BAS 2026 chart of accounts, draft/commit workflow, sequential voucher numbering
• Invoicing -- Create, send, and track invoices with mixed VAT rates and PDF generation
• Bank reconciliation -- PSD2 bank connection via Enable Banking, 4-pass automatic matching
• VAT declaration -- SKV 4700 form mapping, per-rate breakdown, EU/export handling
• Tax reports -- NE-bilaga, INK2, SRU export for Skatteverket
• Supplier invoices -- Registration, payment tracking, input VAT deduction
• Document archive -- SHA-256 integrity, 7-year retention enforcement, full archive ZIP export
• SIE import/export -- Standard Swedish accounting interchange format
• Extension system -- Opt-in plugins for AI categorization, receipt OCR, email, calendar, and more

Self-Hosting

# Clone and configure
git clone https://github.com/erp-mafia/gnubok.git
cd gnubok
cp .env.example .env  # Fill in your Supabase credentials

# Start with Docker Compose
docker compose up -d

See docker-compose.yml for the full service configuration. You need a Supabase project -- create one at supabase.com and run the migrations from supabase/migrations/.

Development Setup

Prerequisites: Node.js 20+, a Supabase project.

npm install
npm run dev       # Start dev server (auto-generates extension registry)
npm test          # Run tests
npm run build     # Production build
npm run lint      # ESLint

Tech Stack

• Framework: Next.js 16 (App Router), React 19, TypeScript (strict)
• Database: Supabase (PostgreSQL + Row Level Security + magic link auth)
• Styling: Tailwind CSS 4 + shadcn/ui
• Integrations: Enable Banking (PSD2), Anthropic SDK, LangChain, OpenAI, Resend, JSZip

Documentation

• CLAUDE.md -- Architecture, bookkeeping engine, database conventions, extension system
• CONTRIBUTING.md -- Development workflow, code style, pull request process
• SECURITY.md -- Vulnerability reporting policy

Contributing

Contributions are welcome. See CONTRIBUTING.md for the full guide.

All commits require a DCO sign-off (git commit -s).

License

AGPL-3.0-or-later. See NOTICE for third-party attributions.