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fix: omit empty task result fields #2736

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fix: omit empty task result fields #2736

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2 changes: 1 addition & 1 deletion src/mcp/server/experimental/task_result_handler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -116,7 +116,7 @@ async def handle(
related_task = RelatedTaskMetadata(task_id=task_id)
related_task_meta: dict[str, Any] = {RELATED_TASK_METADATA_KEY: related_task.model_dump(by_alias=True)}
if result is not None:
result_data = result.model_dump(by_alias=True)
result_data = result.model_dump(by_alias=True, mode="json", exclude_none=True)
existing_meta: dict[str, Any] = result_data.get("_meta") or {}
result_data["_meta"] = {**existing_meta, **related_task_meta}
return GetTaskPayloadResult.model_validate(result_data)
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2 changes: 2 additions & 0 deletions tests/experimental/tasks/server/test_task_result_handler.py
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Expand Up @@ -65,6 +65,8 @@ async def test_handle_returns_result_for_completed_task(
assert response is not None
assert response.meta is not None
assert "io.modelcontextprotocol/related-task" in response.meta
serialized = response.model_dump(by_alias=True, mode="json")
assert serialized["content"] == [{"type": "text", "text": "Done!"}]


@pytest.mark.anyio
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