refactor: use snake case instead of camel case in types (#1894)

src/mcp/shared/experimental/tasks/capabilities.py

@@ -48,8 +48,8 @@ def check_tasks_capability(
     if required.requests.sampling is not None:
         if client.requests.sampling is None:
             return False
-        if required.requests.sampling.createMessage is not None:
-            if client.requests.sampling.createMessage is None:
+        if required.requests.sampling.create_message is not None:
+            if client.requests.sampling.create_message is None:
                 return False
 
     return True
@@ -74,7 +74,7 @@ def has_task_augmented_sampling(caps: ClientCapabilities) -> bool:
         return False
     if caps.tasks.requests.sampling is None:
         return False
-    return caps.tasks.requests.sampling.createMessage is not None
+    return caps.tasks.requests.sampling.create_message is not None
 
 
 def require_task_augmented_elicitation(client_caps: ClientCapabilities | None) -> None:

src/mcp/shared/experimental/tasks/context.py

@@ -41,7 +41,7 @@ class TaskContext:
     @property
     def task_id(self) -> str:
         """The task identifier."""
-        return self._task.taskId
+        return self._task.task_id
 
     @property
     def task(self) -> Task:

src/mcp/shared/experimental/tasks/helpers.py

@@ -125,12 +125,12 @@ def create_task_state(
     """
     now = datetime.now(timezone.utc)
     return Task(
-        taskId=task_id or generate_task_id(),
+        task_id=task_id or generate_task_id(),
         status=TASK_STATUS_WORKING,
-        createdAt=now,
-        lastUpdatedAt=now,
+        created_at=now,
+        last_updated_at=now,
         ttl=metadata.ttl,
-        pollInterval=500,  # Default 500ms poll interval
+        poll_interval=500,  # Default 500ms poll interval
     )
 
 

src/mcp/shared/experimental/tasks/in_memory_task_store.py

@@ -79,14 +79,14 @@ class InMemoryTaskStore(TaskStore):
 
         task = create_task_state(metadata, task_id)
 
-        if task.taskId in self._tasks:
-            raise ValueError(f"Task with ID {task.taskId} already exists")
+        if task.task_id in self._tasks:
+            raise ValueError(f"Task with ID {task.task_id} already exists")
 
         stored = StoredTask(
             task=task,
             expires_at=self._calculate_expiry(metadata.ttl),
         )
-        self._tasks[task.taskId] = stored
+        self._tasks[task.task_id] = stored
 
         # Return a copy to prevent external modification
         return Task(**task.model_dump())
@@ -124,10 +124,10 @@ class InMemoryTaskStore(TaskStore):
             status_changed = True
 
         if status_message is not None:
-            stored.task.statusMessage = status_message
+            stored.task.status_message = status_message
 
-        # Update lastUpdatedAt on any change
-        stored.task.lastUpdatedAt = datetime.now(timezone.utc)
+        # Update last_updated_at on any change
+        stored.task.last_updated_at = datetime.now(timezone.utc)
 
         # If task is now terminal and has TTL, reset expiry timer
         if status is not None and is_terminal(status) and stored.task.ttl is not None:

src/mcp/shared/experimental/tasks/polling.py

@@ -41,5 +41,5 @@ async def poll_until_terminal(
         if is_terminal(status.status):
             break
 
-        interval_ms = status.pollInterval if status.pollInterval is not None else default_interval_ms
+        interval_ms = status.poll_interval if status.poll_interval is not None else default_interval_ms
         await anyio.sleep(interval_ms / 1000)