Exclude forge contracts from runtime dependencies

internal/apicheck/main_test.go

@@ -10,6 +10,26 @@ import (
 	"testing"
 )
 
+func TestRuntimeFacadeCannotDependOnForge(t *testing.T) {
+	for _, indirect := range []bool{false, true} {
+		name := "direct"
+		dependency := modulePath + "/internal/forge"
+		packages := []listedPackage{{ImportPath: dependency}}
+		if indirect {
+			name = "transitive"
+			packages = append(packages, listedPackage{ImportPath: modulePath + "/internal/runtime", Imports: []string{dependency}})
+			dependency = modulePath + "/internal/runtime"
+		}
+		packages = append(packages, listedPackage{ImportPath: modulePath + "/buildinfo", Imports: []string{dependency}})
+		t.Run(name, func(t *testing.T) {
+			err := checkImportDirections(packages)
+			if err == nil || !strings.Contains(err.Error(), "buildinfo") || !strings.Contains(err.Error(), "/internal/forge") {
+				t.Fatalf("dependency check = %v, want excluded forge runtime dependency", err)
+			}
+		})
+	}
+}
+
 func TestExportedContractBoundaries(t *testing.T) {
 	tests := []struct {
 		name      string