enforce lifecycle evidence contracts

internal/store/store_test.go

@@ -72,3 +72,23 @@ func TestArtifactIsContentAddressed(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func TestLifecycleEventsRequireEvidence(t *testing.T) {
+	cases := []struct {
+		name string
+		typ  string
+		body string
+	}{
+		{"release", "TaskReleased", `{}`},
+		{"complete", "TaskCompleted", `{}`},
+		{"block", "TaskBlocked", `{}`},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			err := domain.ValidateEvent(domain.Event{Type: tc.typ, TaskID: "task-1", Version: 1, Payload: json.RawMessage(tc.body)})
+			if err == nil {
+				t.Fatal("expected lifecycle evidence validation error")
+			}
+		})
+	}
+}