Feature Request: support OpenAI `/responses` API on `/v1`

[jtbaker]

Problem

OpenAI's Codex agent only supports the "responses" API (instead of the completions API) now. I don't use Codex myself, but have some colleagues I'd like to convert to using local models that prefer the harness, and would love for them to be able to use MTPLX with Codex.

Related:

• Need API Compatibility for "/responses" jundot/omlx#138
• 作者能否添加一个类似ollama一键部署到各个工具的命令，例如一键部署到openclaw jundot/omlx#145
• jundot/omlx@f03b6e6

Proposal

Support the OpenAI responses API on v1 route

[youssofal]

acked. likely yes for codex compat, sequenced behind the current reliability train.

[lb1001]

I also think it's a good idea to support v1/responses API in this awesome product.

[rzuf666]

I also kindly ask to add compatibility with OpenAI "responses" in the API, I would like to use the Codex app and CLI with Qwen3.8 and it is currently impossible, I'm sure there are many users who would like to use MTPLX with Codex