diff --git a/app/common/singleton_abstract.py b/app/common/singleton_abstract.py
deleted file mode 100644
index ef3b65a4..00000000
--- a/app/common/singleton_abstract.py
+++ /dev/null
@@ -1,18 +0,0 @@
-from abc import ABCMeta
-
-
-class SingletonABCMeta(ABCMeta):
-    _instances = {}
-
-    def __call__(cls, *args, **kwargs):
-        if cls not in cls._instances:
-            # Ensure the class implements __call__ if it's not the ABC itself
-            # This checks if '__call__' is implemented directly in the subclass
-            if "__call__" in cls.__dict__:
-                instance = super().__call__(*args, **kwargs)
-                cls._instances[cls] = instance
-            else:
-                raise NotImplementedError(
-                    f"{cls.__name__} must implement the __call__ method."
-                )
-        return cls._instances[cls]
diff --git a/app/domain/pipeline_execution_dto.py b/app/domain/pipeline_execution_dto.py
index 8482e7d9..282b3a97 100644
--- a/app/domain/pipeline_execution_dto.py
+++ b/app/domain/pipeline_execution_dto.py
@@ -1,7 +1,11 @@
-from pydantic import BaseModel
+from typing import List
+
+from pydantic import BaseModel, Field
 
 from domain.pipeline_execution_settings_dto import PipelineExecutionSettingsDTO
+from domain.status.stage_dto import StageDTO
 
 
 class PipelineExecutionDTO(BaseModel):
     settings: PipelineExecutionSettingsDTO
+    initial_stages: List[StageDTO] = Field(alias="initialStages")
diff --git a/app/domain/pipeline_execution_settings_dto.py b/app/domain/pipeline_execution_settings_dto.py
index a7f69cec..9b77c84f 100644
--- a/app/domain/pipeline_execution_settings_dto.py
+++ b/app/domain/pipeline_execution_settings_dto.py
@@ -6,3 +6,4 @@
 class PipelineExecutionSettingsDTO(BaseModel):
     authentication_token: str = Field(alias="authenticationToken")
     allowed_models: List[str] = Field(alias="allowedModels")
+    artemis_base_url: str = Field(alias="artemisBaseUrl")
diff --git a/app/domain/tutor_chat/tutor_chat_pipeline_execution_dto.py b/app/domain/tutor_chat/tutor_chat_pipeline_execution_dto.py
index cfa8f465..e52d10aa 100644
--- a/app/domain/tutor_chat/tutor_chat_pipeline_execution_dto.py
+++ b/app/domain/tutor_chat/tutor_chat_pipeline_execution_dto.py
@@ -1,7 +1,8 @@
 from typing import List
 
-from pydantic import BaseModel, Field
+from pydantic import Field
 
+from domain import PipelineExecutionDTO
 from domain.data.course_dto import CourseDTO
 from domain.data.message_dto import MessageDTO
 from domain.data.programming_exercise_dto import ProgrammingExerciseDTO
@@ -9,7 +10,7 @@
 from domain.data.submission_dto import SubmissionDTO
 
 
-class TutorChatPipelineExecutionDTO(BaseModel):
+class TutorChatPipelineExecutionDTO(PipelineExecutionDTO):
     latest_submission: SubmissionDTO = Field(alias="latestSubmission")
     exercise: ProgrammingExerciseDTO
     course: CourseDTO
diff --git a/app/pipeline/pipeline.py b/app/pipeline/pipeline.py
index e330f51a..a7cc4be6 100644
--- a/app/pipeline/pipeline.py
+++ b/app/pipeline/pipeline.py
@@ -1,7 +1,7 @@
-from app.common.singleton_abstract import SingletonABCMeta
+from abc import ABCMeta
 
 
-class Pipeline(metaclass=SingletonABCMeta):
+class Pipeline(metaclass=ABCMeta):
     """Abstract class for all pipelines"""
 
     implementation_id: str
diff --git a/app/web/routers/pipelines.py b/app/web/routers/pipelines.py
index 15246c7b..3dd70188 100644
--- a/app/web/routers/pipelines.py
+++ b/app/web/routers/pipelines.py
@@ -5,6 +5,7 @@
     TutorChatPipelineExecutionDTO,
 )
 from app.pipeline.chat.tutor_chat_pipeline import TutorChatPipeline
+from web.status.status_update import TutorChatStatusCallback
 
 router = APIRouter(prefix="/api/v1/pipelines", tags=["pipelines"])
 logger = logging.getLogger(__name__)
@@ -12,8 +13,9 @@
 
 @router.post("/tutor-chat/{variant}/run", status_code=status.HTTP_202_ACCEPTED)
 def run_pipeline(variant: str, dto: TutorChatPipelineExecutionDTO):
-    pipeline = TutorChatPipeline()
-    pipeline(wrapper=dto, callback=None)
+    callback = TutorChatStatusCallback(run_id=dto.settings.authentication_token)
+    pipeline = TutorChatPipeline(callback=callback)
+    pipeline(dto=dto)
 
 
 @router.get("/{feature}")
diff --git a/app/web/status/status_update.py b/app/web/status/status_update.py
index 652cc017..dd32fb5a 100644
--- a/app/web/status/status_update.py
+++ b/app/web/status/status_update.py
@@ -20,9 +20,12 @@ def on_status_update(self, status: Any):
 class TutorChatStatusCallback(StatusCallback):
     def __init__(self, run_id: str):
         url = f"/api/v1/public/pyris/tutorchat/runs/{run_id}/status"
+        self.run_id = run_id
         super().__init__(url)
 
     def on_status_update(self, status: TutorChatStatusUpdateDTO):
         requests.post(
-            self.url, headers={"Content-Type": "application/json"}, json=status.json()
+            self.url,
+            headers={"Content-Type": "application/json", "Authorization": self.run_id},
+            json=status.json(),
         )