Complete forge delivery regression coverage

internal/apicheck/main.go

@@ -226,6 +226,33 @@ func checkImportDirections(packages []listedPackage) error {
 	}
 	visit(modulePath + "/buildinfo")
 
+	for _, root := range []string{
+		modulePath + "/internal/delivery",
+		modulePath + "/internal/forge",
+		modulePath + "/internal/artifact",
+	} {
+		seen := make(map[string]bool)
+		var visitDelivery func(string)
+		visitDelivery = func(path string) {
+			if seen[path] {
+				return
+			}
+			seen[path] = true
+			if path == modulePath+"/internal/gitea" {
+				violations = append(violations, fmt.Sprintf("shared package %s depends on Gitea adapter", root))
+				return
+			}
+			pkg, ok := byPath[path]
+			if !ok {
+				return
+			}
+			for _, imported := range pkg.Imports {
+				visitDelivery(imported)
+			}
+		}
+		visitDelivery(root)
+	}
+
 	if len(violations) == 0 {
 		return nil
 	}

internal/apicheck/main_test.go

@@ -162,6 +162,30 @@ func TestRuntimeFacadeCannotDependOnExternalPackages(t *testing.T) {
 	}
 }
 
+func TestSharedDeliveryPackagesCannotDependOnGitea(t *testing.T) {
+	allowed := []listedPackage{
+		{ImportPath: modulePath + "/internal/delivery", Imports: []string{modulePath + "/internal/forge", modulePath + "/internal/artifact"}},
+		{ImportPath: modulePath + "/internal/forge"},
+		{ImportPath: modulePath + "/internal/artifact"},
+		{ImportPath: modulePath + "/internal/gitea"},
+	}
+	if err := checkImportDirections(allowed); err != nil {
+		t.Fatalf("shared delivery boundary rejected neutral dependencies: %v", err)
+	}
+
+	violating := []listedPackage{
+		{ImportPath: modulePath + "/internal/delivery", Imports: []string{modulePath + "/internal/policy"}},
+		{ImportPath: modulePath + "/internal/policy", Imports: []string{modulePath + "/internal/gitea"}},
+		{ImportPath: modulePath + "/internal/forge"},
+		{ImportPath: modulePath + "/internal/artifact"},
+		{ImportPath: modulePath + "/internal/gitea"},
+	}
+	err := checkImportDirections(violating)
+	if err == nil || !strings.Contains(err.Error(), "shared package "+modulePath+"/internal/delivery depends on Gitea adapter") {
+		t.Fatalf("checkImportDirections() error = %v, want transitive shared-delivery violation", err)
+	}
+}
+
 func checkFixture(t *testing.T, facadeSource string) []string {
 	t.Helper()
 	fset := token.NewFileSet()