Support inherited PromptKit profiles

internal/cli/promptkit_profiles_test.go

@@ -157,3 +157,25 @@ func TestExplicitPromptKitProfileValidationUsesFallbackAssets(t *testing.T) {
 		t.Fatalf("validateExplicitPromptKitProfiles() error = %v, want nil", err)
 	}
 }
+
+func TestExplicitPromptKitProfileValidationRejectsInvalidInheritanceBeforeGeneration(t *testing.T) {
+	for _, profiles := range []string{
+		"id: child\nbase_profile: missing\n",
+		"id: first\nbase_profile: second\n\n---\nid: second\nbase_profile: first\n",
+	} {
+		t.Run("invalid inheritance", func(t *testing.T) {
+			profilePath := filepath.Join(t.TempDir(), "profiles.yaml")
+			if err := os.WriteFile(profilePath, []byte(profiles), 0o600); err != nil {
+				t.Fatal(err)
+			}
+			profileID := "child"
+			if strings.Contains(profiles, "id: first") {
+				profileID = "first"
+			}
+			err := validateExplicitPromptKitProfiles(context.Background(), config.Config{PromptKit: config.PromptKitConfig{ProfileFile: profilePath}}, []string{profileID}, nil)
+			if err == nil || !strings.Contains(err.Error(), "invalid or unreadable") || strings.Contains(err.Error(), profilePath) {
+				t.Fatalf("profile preflight error = %v", err)
+			}
+		})
+	}
+}