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fix: omit null optional fields from task result payloads (#2809)

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Co-authored-by: Sheldon <neooosky@gmail.com>
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Sheldon 2026-06-10 17:37:52 +08:00 • committed by GitHub
commit 2309e5ef97
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1 changed files with 31 additions and 2 deletions
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10
src/mcp/server/experimental/task_result_handler.py
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@ -129,9 +129,15 @@ class TaskResultHandler:
# The stored result contains the actual payload data
# Per spec: tasks/result MUST include _meta with related-task metadata
related_task = RelatedTaskMetadata(taskId=task_id)
related_task_meta: dict[str, Any] = {RELATED_TASK_METADATA_KEY: related_task.model_dump(by_alias=True)}
related_task_meta: dict[str, Any] = {
RELATED_TASK_METADATA_KEY: related_task.model_dump(
by_alias=True,
mode="json",
exclude_none=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)