Built-in ACP protocol support, similar to Gemini CLI ACP mode?

Hi Codex team,

I would like to ask whether Codex has considered providing a built-in implementation of the Agent Client Protocol (ACP), similar to Gemini CLI ACP mode:

https://geminicli.com/docs/cli/acp-mode/

From an integration perspective, having ACP support built directly into Codex would make it easier for external tools and agent platforms to connect to Codex in a standard way, instead of each integration needing to build and maintain its own custom bridge.

A few questions:

1. Is ACP support aligned with the direction of the Codex CLI/project?
2. Are there technical or product reasons why Codex does not include an ACP implementation today?
3. Would the maintainers welcome a community PR that adds ACP support, assuming it follows the project architecture and quality requirements?

Thanks.