Fix Python test failures

- Mode.set() now returns None (void) - remove result assertions
- ModelSupports.vision is optional in the schema - default to False

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

python/copilot/client.py

@@ -360,15 +360,13 @@ def to_dict(self) -> dict:
 class ModelSupports:
     """Model support flags"""
 
-    vision: bool
+    vision: bool = False
     reasoning_effort: bool = False  # Whether this model supports reasoning effort
 
     @staticmethod
     def from_dict(obj: Any) -> ModelSupports:
         assert isinstance(obj, dict)
-        vision = obj.get("vision")
-        if vision is None:
-            raise ValueError("Missing required field 'vision' in ModelSupports")
+        vision = obj.get("vision", False)
         reasoning_effort = obj.get("reasoningEffort", False)
         return ModelSupports(vision=bool(vision), reasoning_effort=bool(reasoning_effort))
 

python/e2e/test_rpc.py

@@ -129,18 +129,16 @@ async def test_get_and_set_session_mode(self):
             assert initial == SessionMode.INTERACTIVE
 
             # Switch to plan mode
-            plan_result = await session.rpc.mode.set(ModeSetRequest(mode=SessionMode.PLAN))
-            assert plan_result == SessionMode.PLAN
+            await session.rpc.mode.set(ModeSetRequest(mode=SessionMode.PLAN))
 
             # Verify mode persisted
             after_plan = await session.rpc.mode.get()
             assert after_plan == SessionMode.PLAN
 
             # Switch back to interactive
-            interactive_result = await session.rpc.mode.set(
+            await session.rpc.mode.set(
                 ModeSetRequest(mode=SessionMode.INTERACTIVE)
             )
-            assert interactive_result == SessionMode.INTERACTIVE
 
             await session.disconnect()
             await client.stop()