Jakob Wennberg eb77ad50b5 feat(mcp): add create_voucher + correct_entry MCP tools (#448)
* feat(mcp): add create_voucher + correct_entry MCP tools

The MCP toolset had no way to post a journal entry outside the preset
workflows (categorize_transaction, create_invoice, …). That blocks
legitimate flows the engine already supports — K3 capitalization to BAS
1010, period-end accruals, FX adjustments, prepayments, and rättelseposter
for foreign reverse-charge VAT that landed on 2641 instead of 2614/2645.

create_voucher exposes the existing createJournalEntry() primitive:
arbitrary balanced lines, optional fiscal-period auto-resolution, staged
for human approval. correct_entry exposes correctEntry() (storno + new
corrected entry per BFL 5 kap 5§) so part of a posted verifikation can be
fixed without losing the legs that were right.

Both are HIGH risk in OPERATION_RISK_TIERS — the arbitrary account/amount/
period inputs make them compliance-critical despite being structurally
similar to uncategorize_transaction (medium). Approval flow unchanged; no
auto-commit, regardless of trust level.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(mcp): address PR #448 review — voucher tools hardening

Greptile P1 + compliance bot findings, all in one pass.

commitCreateVoucher (commit.ts):
- Hardcode source_type to 'manual' instead of reading from params. A future
  direct-staging path or hand-inserted pending_operations row could
  otherwise inject 'bank_transaction'/'invoice_created'/etc. and corrupt
  the audit-trail origin.
- Re-validate balance defensively before reaching the engine, so a tampered
  params row surfaces a clean Swedish 400 instead of an opaque engine error.

gnubok_create_voucher (server.ts):
- Validate the explicit fiscal_period_id when supplied: confirm it exists,
  is open (is_closed = false), and that entry_date falls within its span.
  Without this, a closed/locked period was only caught at commit-time with
  a generic DB-trigger error.
- Throw at staging when any line targets an account that's missing from
  chart_of_accounts or marked inactive, rather than relying on the
  approver to spot the advisory flag.
- Remove source_type from the staged params blob entirely — the executor
  ignores it anyway, no point letting it travel through.
- Add a comment that the staging-time period-lock check is advisory and
  the executor is the authoritative guard, so future cleanup doesn't
  remove either as 'redundant'.

Descriptions:
- gnubok_correct_entry now explicitly notes that the storno + corrected
  entries land in the original period (defends against compliance bot's
  speculative "different period" concern recurring on future reviews).
- Both tools' tax_code field gets a note that the BAS account number
  drives momsdeklaration ruta mapping, not tax_code — guards against an
  LLM treating tax_code as the VAT-routing dial.

commitCorrectEntry (commit.ts):
- Add a comment pointing at storno-service.ts:99,102,195,198 to make the
  "uses original period and date" invariant explicit in this file.

Tests:
- +2 voucher-executors cases: source_type tampering is ignored, unbalanced
  params return 400.
- +10 new voucher-tools tests (MCP layer): unbalanced, closed explicit
  period, missing explicit period, entry_date outside period, unknown
  account, inactive account, happy path + correct_entry registration +
  unbalanced replacement.

720 tests pass in the impacted suites; full suite 2998/2998.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-12 17:16:39 +02:00
2026-05-11 23:18:17 +02:00
2026-05-06 11:12:02 +02:00
2026-04-22 15:33:04 +02:00

gnubok

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

License: AGPL-3.0-or-later

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

git clone https://github.com/erp-mafia/gnubok.git
cd gnubok
./setup.sh              # Prompts for Supabase credentials, generates .env
docker compose up -d

You need a Supabase project and must apply the database migrations before first use. See SELF-HOSTING.md for the full step-by-step guide, including Supabase setup, auth configuration, optional features (AI, email, push notifications), and troubleshooting.

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 + email/password auth + TOTP MFA)
  • Styling: Tailwind CSS 4 + shadcn/ui
  • Integrations: Enable Banking (PSD2), Anthropic SDK, LangChain, OpenAI, Resend, JSZip

Documentation

  • SELF-HOSTING.md -- Full self-hosting guide (Docker, Supabase setup, migrations, optional features)
  • 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 with an extension exception: third-party extensions that interact solely through the documented Extension API may be licensed under any terms, including proprietary. See LICENSE for details and NOTICE for third-party attributions.

S
Description
Accounted — svensk bokföringsmotor (AGPL, BAS 2026, BFL-compliant, 150+ MCP tools). Finance-kapacitet brevet ERPNext. ADR-ENGAGEMENT-001-tillägg.
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