Octopus 6c6cf98019 fix: merge system messages for custom OpenAI-compatible endpoints (#774) ...

* fix: merge system messages for custom OpenAI endpoints (fixes #734)

When using the OpenAI provider with a custom base URL (e.g., vLLM, LMStudio),
the app sends two system messages to the API. Open-source model chat templates
(Qwen, Llama, etc.) enforce that system messages must appear at the beginning
and reject multiple system message blocks, causing the error:
'System message must be at the beginning.'

Treat custom OpenAI endpoints (client-provided base URL or OPENAI_BASE_URL env
var) the same as other known single-system providers by merging both system
messages into one before sending.

* fix: also detect custom OpenAI endpoint from serverModelConfig.baseUrlEnv

---------

Co-authored-by: dayuan.jiang <jdy.toh@gmail.com>

2026-04-03 12:27:29 +09:00

34 KiB

Raw Blame History

View Raw