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fix: preserve session_id across previous_response_id chains in /v1/responses (#10059)

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The /v1/responses endpoint generated a new UUID session_id for every
request, even when previous_response_id was provided. This caused each
turn of a multi-turn conversation to appear as a separate session on the
web dashboard, despite the conversation history being correctly chained.

Fix: store session_id alongside the response in the ResponseStore, and
reuse it when a subsequent request chains via previous_response_id.
Applies to both the non-streaming /v1/responses path and the streaming
SSE path. The /v1/runs endpoint also gains session continuity from
stored responses (explicit body.session_id still takes priority).

Adds test verifying session_id is preserved across chained requests.
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Teknium 2026-04-14 21:06:32 -07:00 • committed by GitHub
parent ca0ae56ccb
commit 5cbb45d93e
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2 changed files with 51 additions and 3 deletions
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13
gateway/platforms/api_server.py
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@ -1366,6 +1366,7 @@ class APIServerAdapter(BasePlatformAdapter):
"response": completed_env,
"conversation_history": full_history,
"instructions": instructions,
"session_id": session_id,
})
if conversation:
self._response_store.set_conversation(conversation, response_id)
@ -1459,11 +1460,13 @@ class APIServerAdapter(BasePlatformAdapter):
if previous_response_id:
logger.debug("Both conversation_history and previous_response_id provided; using conversation_history")
stored_session_id = None
if not conversation_history and previous_response_id:
stored = self._response_store.get(previous_response_id)
if stored is None:
return web.json_response(_openai_error(f"Previous response not found: {previous_response_id}"), status=404)
conversation_history = list(stored.get("conversation_history", []))
stored_session_id = stored.get("session_id")
# If no instructions provided, carry forward from previous
if instructions is None:
instructions = stored.get("instructions")
@ -1481,8 +1484,9 @@ class APIServerAdapter(BasePlatformAdapter):
if body.get("truncation") == "auto" and len(conversation_history) > 100:
conversation_history = conversation_history[-100:]
# Run the agent (with Idempotency-Key support)
session_id = str(uuid.uuid4())
# Reuse session from previous_response_id chain so the dashboard
# groups the entire conversation under one session entry.
session_id = stored_session_id or str(uuid.uuid4())
stream = bool(body.get("stream", False))
if stream:
@ -1631,6 +1635,7 @@ class APIServerAdapter(BasePlatformAdapter):
"response": response_data,
"conversation_history": full_history,
"instructions": instructions,
"session_id": session_id,
})
# Update conversation mapping so the next request with the same
# conversation name automatically chains to this response
@ -2145,10 +2150,12 @@ class APIServerAdapter(BasePlatformAdapter):
if previous_response_id:
logger.debug("Both conversation_history and previous_response_id provided; using conversation_history")
stored_session_id = None
if not conversation_history and previous_response_id:
stored = self._response_store.get(previous_response_id)
if stored:
conversation_history = list(stored.get("conversation_history", []))
stored_session_id = stored.get("session_id")
if instructions is None:
instructions = stored.get("instructions")
@ -2167,7 +2174,7 @@ class APIServerAdapter(BasePlatformAdapter):
)
conversation_history.append({"role": msg["role"], "content": str(content)})
session_id = body.get("session_id") or run_id
session_id = body.get("session_id") or stored_session_id or run_id
ephemeral_system_prompt = instructions
async def _run_and_close():