diff --git a/DEVLOG.md b/DEVLOG.md
index 7178fe5..0ebfb2d 100644
--- a/DEVLOG.md
+++ b/DEVLOG.md
@@ -44,3 +44,20 @@ Keine Commits in dieser Session.
 Keine Änderungen ermittelbar.
 
 ---
+## 2026-08-28 22:37 – 22:41 (3m)
+**Beschreibung:** Claude Code Session
+**Projekt:** nexarch
+
+### Commits
+- 5a0d074 QA-01: teststrategie-core (pflichttest-gate, testdb-isolationsnachweis, ci-workflow)
+
+### Geänderte Dateien
+- .gitea/workflows/pflichttest-gate.yml      | 20 ++++++++++++++++++++
+- cmd/pflichttestgate/main.go                | 41 +++++++++++++++++++++++++++++++++++++++++
+- docs/TESTSTRATEGIE-CORE.md                 | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+- internal/pflichttestgate/gate.go           | 67 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+- internal/pflichttestgate/gate_test.go      | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+- internal/testdbisolation/isolation.go      | 76 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+- internal/testdbisolation/isolation_test.go | 99 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+---
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..5c39671
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,28 @@
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