[codex] Add relay OpenAI fallback for non-Claude models#17
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Updated the PR after real-machine testing: relay/openai now preserves upstream streaming for non-Claude models and converts OpenAI SSE chunks to Anthropic SSE. This avoids the 524 timeout seen when Claude Science sends the full 26-tool request to gpt-5.5. |
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Summary
CSSWITCH_RELAY_MODEL.{base_url}/v1/chat/completionsand reuse the existing Anthropic-to-OpenAI bridge.{base_url}/v1/messagesrelay path.Why
Relay providers can expose GPT/OpenAI-compatible models in
/v1/models, but those models may reject Anthropic/v1/messagescalls with 403. This lets CSSwitch use those models through the provider's OpenAI-compatible chat completions endpoint while preserving existing Claude relay behavior.Validation
python3 -m py_compile proxy/csswitch_proxy.py proxy/dsml_shim.py proxy/qwen_proxy.py test/test_proxy_units.pypython3 test/test_proxy_units.pysh test/run_all.shwith local port access: Python/Node/main script suites passed; existingdoctorops script has one unrelated key-present assertion mismatch (CSSWITCH_KEY_PRESENTvsDEEPSEEK_API_KEYtest setup).