Changelog

2025-10-28 - 1.2.1 - fix(skr.classes.account)

Remove incorrect SKR04 automatic account 3300; improve VAT posting validation and test isolation; update readme hints and CI settings

ts/skr.classes.account.ts: Removed account '3300' from the SKR04 automatic accounts list (3300 is Fahrzeugkosten and must be postable).
ts/skr.postingkeys.ts: Relax VAT amount requirement — VAT amount is no longer required when posting to VAT accounts or to debtor/creditor accounts (settlement lines).
ts/skr.classes.journalentry.ts: Detect VAT lines in journal entries and pass VAT-aware context into posting key validation to avoid false-positive VAT errors.
test/test.skr04.ts: Use timestamped database names to ensure isolated test runs and avoid DB conflicts during CI.
readme.hints.md: Updated status and notes (tests passing, recent fixes, architecture notes and validation pipeline).
.claude/settings.local.json: Added local CI/agent permission settings used by the project environment.

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

E-Invoice Integration: Full XRechnung/ZUGFeRD support with import/export capabilities
Invoice Processing: Automatic booking of electronic invoices to accounting
Advanced Export Features: Comprehensive export functionality for accounts, balances, and ledger data
PDF Generation: Professional PDF report generation with customizable templates
Security Features: Merkle tree audit trails and digital signature support for tamper-proof records
Invoice Storage: Dedicated invoice persistence layer with search and filtering
Invoice Adapter: Bidirectional conversion between e-invoice formats and internal data model
Invoice Booking Engine: Intelligent automatic account detection and VAT splitting
Cryptographic Signatures: Support for signing exports with private keys and certificates
Structured Export Formats: Export data in multiple formats (JSON, CSV, PDF)
Jahresabschluss Export: Complete annual closing package generation
New dependencies: @e-invoice-eu/core, @fin.cx/einvoice, merkletreejs, node-forge
Enhanced documentation with invoice and export examples

SKR standard validation in postJournalEntry to ensure accounts match official SKR03/SKR04 data
Module-level Maps for O(1) SKR standard lookups
validateAccountsAgainstSKR method for checking account type and class compliance
Smart validation that allows SKR04 class 8 custom accounts
Warning logs for non-standard accounts and type/class mismatches