fix: extract system messages from Responses API input into instructions#53
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Yinhan-Lu wants to merge 1 commit intoCaddyGlow:mainfrom
Open
fix: extract system messages from Responses API input into instructions#53Yinhan-Lu wants to merge 1 commit intoCaddyGlow:mainfrom
Yinhan-Lu wants to merge 1 commit intoCaddyGlow:mainfrom
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The upstream Codex Responses API rejects `role: "system"` messages in the input array. This causes a 400 error when clients (e.g., langchain-openai with use_responses_api=True) include SystemMessage in the input. Modify `_normalize_input_messages` to extract system and developer messages from the input array and merge them into the `instructions` field before forwarding upstream. This matches the behavior already implemented in the Chat Completions → Responses API converter. Fixes CaddyGlow#52 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
_normalize_input_messagesin the Codex adapter to extractrole: "system"androle: "developer"messages from theinputarray and merge them into theinstructionsfieldProblem
Clients like langchain-openai (with
use_responses_api=True) includeSystemMessageas a message in theinputarray. The upstream Codex Responses API rejects these with:This forces downstream projects (e.g., EvoScientist) to fall back from Responses API to Chat Completions API when using ccproxy, which means the
reasoningparameter cannot be used — OAuth users get degraded model capabilities compared to direct API key users.Fix
The Chat Completions → Responses API converter (
openai_to_openai/requests.py) already handles this correctly by extracting system messages intoinstructions. This PR applies the same logic to_normalize_input_messagesin the Codex adapter, which handles the direct Responses API path (/v1/responses).Test plan
Fixes #52
🤖 Generated with Claude Code