diff --git a/app/assets/services/file_utils.py b/app/assets/services/file_utils.py
index f54ea3a34..a4fe77d40 100644
--- a/app/assets/services/file_utils.py
+++ b/app/assets/services/file_utils.py
@@ -36,15 +36,23 @@ def verify_file_unchanged(
     return True
 
 
+def is_visible(name: str) -> bool:
+    """Return True if a file or directory name is visible (not hidden)."""
+    return not name.startswith(".")
+
+
 def list_files_recursively(base_dir: str) -> list[str]:
     """Recursively list all files in a directory."""
     out: list[str] = []
     base_abs = os.path.abspath(base_dir)
     if not os.path.isdir(base_abs):
         return out
-    for dirpath, _subdirs, filenames in os.walk(
+    for dirpath, subdirs, filenames in os.walk(
         base_abs, topdown=True, followlinks=False
     ):
+        subdirs[:] = [d for d in subdirs if is_visible(d)]
         for name in filenames:
+            if not is_visible(name):
+                continue
             out.append(os.path.abspath(os.path.join(dirpath, name)))
     return out
diff --git a/tests-unit/assets_test/test_file_utils.py b/tests-unit/assets_test/test_file_utils.py
new file mode 100644
index 000000000..828b2b81a
--- /dev/null
+++ b/tests-unit/assets_test/test_file_utils.py
@@ -0,0 +1,55 @@
+from app.assets.services.file_utils import is_visible, list_files_recursively
+
+
+class TestIsVisible:
+    def test_visible_file(self):
+        assert is_visible("file.txt") is True
+
+    def test_hidden_file(self):
+        assert is_visible(".hidden") is False
+
+    def test_hidden_directory(self):
+        assert is_visible(".git") is False
+
+    def test_visible_directory(self):
+        assert is_visible("src") is True
+
+    def test_dotdot_is_hidden(self):
+        assert is_visible("..") is False
+
+    def test_dot_is_hidden(self):
+        assert is_visible(".") is False
+
+
+class TestListFilesRecursively:
+    def test_skips_hidden_files(self, tmp_path):
+        (tmp_path / "visible.txt").write_text("a")
+        (tmp_path / ".hidden").write_text("b")
+
+        result = list_files_recursively(str(tmp_path))
+
+        assert len(result) == 1
+        assert result[0].endswith("visible.txt")
+
+    def test_skips_hidden_directories(self, tmp_path):
+        hidden_dir = tmp_path / ".hidden_dir"
+        hidden_dir.mkdir()
+        (hidden_dir / "file.txt").write_text("a")
+
+        visible_dir = tmp_path / "visible_dir"
+        visible_dir.mkdir()
+        (visible_dir / "file.txt").write_text("b")
+
+        result = list_files_recursively(str(tmp_path))
+
+        assert len(result) == 1
+        assert "visible_dir" in result[0]
+        assert ".hidden_dir" not in result[0]
+
+    def test_empty_directory(self, tmp_path):
+        result = list_files_recursively(str(tmp_path))
+        assert result == []
+
+    def test_nonexistent_directory(self, tmp_path):
+        result = list_files_recursively(str(tmp_path / "nonexistent"))
+        assert result == []