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1dd7ec91fe
Reported by user testing in Open WebUI: across three turns
user "test 1" -> "1"
user "test 2" -> "12" (should be "2")
user "test 3. reply only with 3" -> "1123" (should be "3")
The model was literally APPENDING prior assistant outputs into the new
generation instead of producing a fresh response. Root cause: when
sending each prior turn as a separate `assistant`-role entry in
`/backend-api/f/conversation`'s `messages` array, ChatGPT's web API
("action: next") treats those as in-progress messages the model can
continue rather than as completed turns. So the new generation extends
the most recent assistant message.
Fix: don't replay prior turns as separate messages. Instead fold the
full history into the system message as plain text and send only the
current user query as a single new turn. Verified end-to-end:
Turn 1 -> "1"
Turn 2 -> "2"
Turn 3 -> "3"
user "favorite color is teal" / assistant "Got it" / user "what color?"
-> "Teal" (memory still preserved through the system-message channel)
Streaming + multi-turn -> correct, real-time chunks
Updated two unit tests that previously asserted history items showed up
as separate `user`/`assistant` messages in the request — they now check
for the single-user-message + history-in-system-message shape.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>