fix: handle None command_paths without warning

cecli/commands/core.py

@@ -80,11 +80,18 @@ def __init__(
         self.editor = editor
         self.original_read_only_fnames = set(original_read_only_fnames or [])
 
-        try:
-            self.custom_commands = json.loads(getattr(self.args, "command_paths", "[]"))
-        except (json.JSONDecodeError, TypeError) as e:
-            self.io.tool_warning(f"Failed to parse command paths JSON: {e}")
-            self.custom_commands = []
+        command_paths_raw = getattr(self.args, "command_paths", None)
+        if isinstance(command_paths_raw, (list, tuple)):
+            # When the parser already produced a list/tuple, accept it directly
+            self.custom_commands = list(command_paths_raw)
+        else:
+            if command_paths_raw is None:
+                command_paths_raw = "[]"
+            try:
+                self.custom_commands = json.loads(command_paths_raw)
+            except (json.JSONDecodeError, TypeError) as e:
+                self.io.tool_warning(f"Failed to parse command paths JSON: {e}")
+                self.custom_commands = []
 
         # Load custom commands from plugin paths
         self._load_custom_commands(self.custom_commands)

tests/basic/test_commands.py

@@ -6,6 +6,7 @@
 import tempfile
 from io import StringIO
 from pathlib import Path
+from types import SimpleNamespace
 from unittest import TestCase, mock
 
 import git
@@ -130,6 +131,16 @@ async def test_cmd_copy_with_cur_messages(self):
             # Assert tool_error was called indicating no assistant messages
             mock_tool_error.assert_called_once_with("No assistant messages found to copy.")
 
+    def test_command_paths_none_does_not_warn(self):
+        io = InputOutput(pretty=False, fancy_input=False, yes=True)
+        args = SimpleNamespace(command_paths=None)
+
+        with mock.patch.object(io, "tool_warning") as tool_warning:
+            commands = Commands(io, coder=None, args=args)
+
+        self.assertEqual(commands.custom_commands, [])
+        tool_warning.assert_not_called()
+
     async def test_cmd_copy_pyperclip_exception(self):
         io = InputOutput(pretty=False, fancy_input=False, yes=True)
         coder = await Coder.create(self.GPT35, None, io)