kin: auto-commit after pipeline

tests/test_api.py

@@ -2174,3 +2174,28 @@ def test_get_projects_includes_test_command(client):
     p1 = next((p for p in projects if p["id"] == "p1"), None)
     assert p1 is not None
     assert p1["test_command"] == "cargo test"
+
+
+def test_patch_project_test_command_db_value_verified(client):
+    """KIN-ARCH-008 decision #318: PATCH test_command сохраняет значение и в response, и в БД."""
+    r = client.patch("/api/projects/p1", json={"test_command": "pytest --tb=short"})
+    assert r.status_code == 200
+    assert r.json()["test_command"] == "pytest --tb=short"
+
+    from core.db import init_db
+    conn = init_db(api_module.DB_PATH)
+    row = conn.execute("SELECT test_command FROM projects WHERE id = 'p1'").fetchone()
+    conn.close()
+    assert row[0] == "pytest --tb=short"
+
+
+def test_patch_project_test_command_null_returns_400(client):
+    """KIN-ARCH-008: PATCH с test_command=null (и без других полей) → 400 'Nothing to update'.
+
+    null трактуется как «поле не передано»: has_any=False → 400.
+    Это документирует текущее поведение: нет способа сбросить test_command через PATCH null.
+    """
+    client.patch("/api/projects/p1", json={"test_command": "npm test"})
+    r = client.patch("/api/projects/p1", json={"test_command": None})
+    assert r.status_code == 400
+    assert "Nothing to update" in r.json()["detail"]