chore: minor cleanup

application/api/answer/routes/answer.py

@@ -9,6 +9,7 @@ from application.api import api
 from application.api.answer.routes.base import answer_ns, BaseAnswerResource
 
 from application.api.answer.services.continuation_service import (
+    RESUME_IN_PROGRESS_MESSAGE,
     ResumeInProgressError,
 )
 from application.api.answer.services.persistence_policy import resolve_persistence
@@ -179,7 +180,8 @@ class AnswerResource(Resource, BaseAnswerResource):
                 extra={"error": str(e)},
             )
             return make_response(
-                {"error": str(e), "code": "resume_in_progress"}, 409,
+                {"error": RESUME_IN_PROGRESS_MESSAGE, "code": "resume_in_progress"},
+                409,
             )
         except Exception as e:
             logger.error(

application/api/answer/routes/stream.py

@@ -9,6 +9,7 @@ from application.api import api
 from application.api.answer.routes.base import answer_ns, BaseAnswerResource
 
 from application.api.answer.services.continuation_service import (
+    RESUME_IN_PROGRESS_MESSAGE,
     ResumeInProgressError,
 )
 from application.api.answer.services.persistence_policy import resolve_persistence
@@ -192,7 +193,7 @@ class StreamResource(Resource, BaseAnswerResource):
                 extra={"error": str(e)},
             )
             return Response(
-                self.error_stream_generate(str(e)),
+                self.error_stream_generate(RESUME_IN_PROGRESS_MESSAGE),
                 status=409,
                 mimetype="text/event-stream",
             )

application/api/answer/services/continuation_service.py

@@ -35,6 +35,12 @@ class ResumeInProgressError(ValueError):
     """Raised when another request already owns a continuation claim."""
 
 
+# The single wording every route answers this condition with. Handlers render
+# this constant rather than ``str(exc)`` so no exception text — and nothing an
+# exception might later be constructed from — can reach a response body.
+RESUME_IN_PROGRESS_MESSAGE = "Resume already in progress for this conversation."
+
+
 class ContinuationService:
     """Manages pending tool-call state in Postgres."""
 
@@ -147,9 +153,7 @@ class ContinuationService:
                 return claimed
             existing = repo.load_state_any(pg_conv_id, user)
             if existing and existing.get("status") == "resuming":
-                raise ResumeInProgressError(
-                    "Resume already in progress for this conversation."
-                )
+                raise ResumeInProgressError(RESUME_IN_PROGRESS_MESSAGE)
         return None
 
     def delete_state(self, conversation_id: str, user: str) -> bool:

application/api/v1/routes.py

@@ -18,6 +18,7 @@ from application.api.answer.routes.base import BaseAnswerResource
 from application.api.answer.services.persistence_policy import resolve_persistence
 from application.api.answer.services.continuation_service import (
     ContinuationService,
+    RESUME_IN_PROGRESS_MESSAGE,
     ResumeInProgressError,
 )
 from application.api.answer.services.stream_processor import StreamProcessor
@@ -425,7 +426,7 @@ def chat_completions():
         return make_response(
             jsonify({
                 "error": {
-                    "message": "Resume already in progress for this conversation.",
+                    "message": RESUME_IN_PROGRESS_MESSAGE,
                     "type": "conflict_error",
                     "code": "resume_in_progress",
                 }