openai-codex provider crashes: SDK parse_response fails on null output from Codex backend

This issue reports that Hermes v0.14.0 crashes with a 'NoneType' object is not iterable error under the openai-codex provider with gpt-5.5, root-caused to the OpenAI SDK's parse_response() lacking a null guard when the Codex backend returns output: null. This issue is closed.