commit 32a6205a7a576c53455c316d07833bfdcf0125da
Author: Tirsvad <jenstirsvad@gmail.com>
Date:   Sat Oct 17 09:41:56 2026 +0200

    Publish wiki from the repository

diff --git a/Architecture-da.md b/Architecture-da.md
new file mode 100644
index 0000000..b2c455a
--- /dev/null
+++ b/Architecture-da.md
@@ -0,0 +1,14 @@
+# Arkitektur
+
+🌐 [English](Architecture) · **Dansk** · [Bahasa Melayu](Architecture-ms)
+
+Koden følger en lille clean architecture. Imports peger indad.
+
+| Lag | Mappe | Indeholder |
+| --- | --- | --- |
+| Domæne | `src/birthday_wisher/domain/` | `Person` og fejlene |
+| Applikation | `src/birthday_wisher/application/` | Use casen `send_birthday_wishes` og portene (`BirthdayRepository`, `LetterSource`, `MailSender`) |
+| Infrastruktur | `src/birthday_wisher/infrastructure/` | CSV-læser, brevfiler, SMTP-afsender, indstillinger |
+| Præsentation | `src/birthday_wisher/presentation/` | Kommandolinjen og composition root |
+
+Testene afspejler lagene: `tests/unit`, `tests/integration`, `tests/e2e`. Kursets hint om en ordbog med `(month, day)` som nøgle er `birthdays_by_day`.