diff --git a/include/vde/brep/iges_export.h b/include/vde/brep/iges_export.h
index bd1f4b6..ca38283 100644
--- a/include/vde/brep/iges_export.h
+++ b/include/vde/brep/iges_export.h
@@ -82,6 +82,6 @@ namespace vde::brep {
  *
  * @see export_iges 获取字符串输出
  */
-void export_iges_file(const std::string& filepath, const std::vector<BrepModel>& bodies);
+bool export_iges_file(const std::string& filepath, const std::vector<BrepModel>& bodies);
 
 } // namespace vde::brep
diff --git a/include/vde/brep/pmi_mbd.h b/include/vde/brep/pmi_mbd.h
index b7b00d6..8fc0486 100644
--- a/include/vde/brep/pmi_mbd.h
+++ b/include/vde/brep/pmi_mbd.h
@@ -263,7 +263,7 @@ int attach_pmi(BrepModel& body, const PMIAnnotation& annotation,
  * @param body B-Rep model
  * @param pmi_model PMI annotations and views
  */
-void export_pmi_step_ap242_file(const std::string& filepath,
+bool export_pmi_step_ap242_file(const std::string& filepath,
     const BrepModel& body, const PMIModel& pmi_model);
 
 /**
diff --git a/include/vde/brep/step_export.h b/include/vde/brep/step_export.h
index 418865b..f5dc216 100644
--- a/include/vde/brep/step_export.h
+++ b/include/vde/brep/step_export.h
@@ -72,6 +72,6 @@ namespace vde::brep {
  *
  * @see export_step 获取字符串输出
  */
-void export_step_file(const std::string& filepath, const std::vector<BrepModel>& bodies);
+bool export_step_file(const std::string& filepath, const std::vector<BrepModel>& bodies);
 
 }  // namespace vde::brep
diff --git a/include/vde/foundation/industrial_formats.h b/include/vde/foundation/industrial_formats.h
index 8dc4170..66a17a6 100644
--- a/include/vde/foundation/industrial_formats.h
+++ b/include/vde/foundation/industrial_formats.h
@@ -105,7 +105,7 @@ struct JtSegmentHeader {
  *
  * @throws std::runtime_error 写入失败
  */
-void export_jt(const brep::BrepModel& body, const std::string& path);
+bool export_jt(const brep::BrepModel& body, const std::string& path);
 
 // ═══════════════════════════════════════════════════════════════
 //  Parasolid XT
diff --git a/include/vde/foundation/io_obj.h b/include/vde/foundation/io_obj.h
index cbc883d..b979bfa 100644
--- a/include/vde/foundation/io_obj.h
+++ b/include/vde/foundation/io_obj.h
@@ -105,6 +105,6 @@ ObjMeshData read_obj(const std::string& filepath);
  * @see read_obj
  * @ingroup foundation
  */
-void write_obj(const std::string& filepath, const ObjMeshData& data);
+bool write_obj(const std::string& filepath, const ObjMeshData& data);
 
 }  // namespace vde::foundation
diff --git a/src/brep/iges_export.cpp b/src/brep/iges_export.cpp
index b069b96..7709f83 100644
--- a/src/brep/iges_export.cpp
+++ b/src/brep/iges_export.cpp
@@ -643,10 +643,11 @@ std::string export_iges(const std::vector<BrepModel>& bodies) {
     return writer.write(bodies);
 }
 
-void export_iges_file(const std::string& filepath, const std::vector<BrepModel>& bodies) {
+bool export_iges_file(const std::string& filepath, const std::vector<BrepModel>& bodies) {
     std::ofstream out(filepath);
-    if (!out) return;
+    if (!out) return false;
     out << export_iges(bodies);
+    return true;
 }
 
 }  // namespace vde::brep
diff --git a/src/brep/pmi_mbd.cpp b/src/brep/pmi_mbd.cpp
index 9285dde..40d30f4 100644
--- a/src/brep/pmi_mbd.cpp
+++ b/src/brep/pmi_mbd.cpp
@@ -302,15 +302,15 @@ std::string export_pmi_step_ap242(
     return base_step;
 }
 
-void export_pmi_step_ap242_file(const std::string& filepath,
+bool export_pmi_step_ap242_file(const std::string& filepath,
     const BrepModel& body, const PMIModel& pmi_model) {
 
     std::string step_content = export_pmi_step_ap242(body, pmi_model);
     std::ofstream out(filepath);
-    if (out.is_open()) {
-        out << step_content;
-        out.close();
-    }
+    if (!out) return false;
+    out << step_content;
+    out.close();
+    return true;
 }
 
 int auto_generate_pmi(const BrepModel& body, PMIModel& pmi_model,
diff --git a/src/brep/step_export.cpp b/src/brep/step_export.cpp
index 2215c65..ffdbea3 100644
--- a/src/brep/step_export.cpp
+++ b/src/brep/step_export.cpp
@@ -430,10 +430,11 @@ std::string export_step(const std::vector<BrepModel>& bodies) {
     return writer.ss.str();
 }
 
-void export_step_file(const std::string& filepath, const std::vector<BrepModel>& bodies) {
+bool export_step_file(const std::string& filepath, const std::vector<BrepModel>& bodies) {
     std::ofstream out(filepath);
-    if (!out) return;
+    if (!out) return false;
     out << export_step(bodies);
+    return true;
 }
 
 }  // namespace vde::brep
diff --git a/src/curves/advanced_intersection.cpp b/src/curves/advanced_intersection.cpp
index 493b301..5725d99 100644
--- a/src/curves/advanced_intersection.cpp
+++ b/src/curves/advanced_intersection.cpp
@@ -14,6 +14,8 @@
 
 namespace vde::curves {
 
+using namespace std::chrono;
+
 namespace {
 
 // ── 内部辅助函数 ──────────────────────────────────────────
@@ -84,7 +86,6 @@ SSIResult robust_ssi(
     const NurbsSurface& surf_b,
     const SSIOptions& options)
 {
-    using namespace std::chrono;
     auto t_start = high_resolution_clock::now();
 
     SSIResult result;
@@ -424,7 +425,6 @@ SelfIntersectionResult self_intersection_detection(
     const NurbsSurface& surface,
     double tolerance)
 {
-    using namespace std::chrono;
     auto t_start = high_resolution_clock::now();
 
     SelfIntersectionResult result;
diff --git a/src/foundation/industrial_formats.cpp b/src/foundation/industrial_formats.cpp
index a9da695..83f0558 100644
--- a/src/foundation/industrial_formats.cpp
+++ b/src/foundation/industrial_formats.cpp
@@ -438,9 +438,12 @@ BrepModel import_jt_binary(const uint8_t* data, size_t size, const JTOptions& op
     return parser.parse(opts);
 }
 
-void export_jt(const BrepModel& body, const std::string& path) {
+bool export_jt(const BrepModel& body, const std::string& path) {
     std::string data = jt::build_jt_file(body);
-    write_file_bytes(path, data);
+    std::ofstream f(path, std::ios::binary);
+    if (!f) return false;
+    f.write(data.data(), static_cast<std::streamsize>(data.size()));
+    return true;
 }
 
 // ═══════════════════════════════════════════════════════════════
diff --git a/src/foundation/io_obj.cpp b/src/foundation/io_obj.cpp
index a41a6d9..16f620d 100644
--- a/src/foundation/io_obj.cpp
+++ b/src/foundation/io_obj.cpp
@@ -85,9 +85,9 @@ ObjMeshData read_obj(const std::string& filepath) {
     return data;
 }
 
-void write_obj(const std::string& filepath, const ObjMeshData& data) {
+bool write_obj(const std::string& filepath, const ObjMeshData& data) {
     std::ofstream file(filepath);
-    if (!file) return;
+    if (!file) return false;
 
     file.precision(12);
 
@@ -140,6 +140,7 @@ void write_obj(const std::string& filepath, const ObjMeshData& data) {
         }
         file << "\n";
     }
+    return true;
 }
 
 }  // namespace vde::foundation