feature request: exec --output-last-message to stdout

I would like to be able to easily build a command that automatically writes commit messages because I don't like writing them. Ideally I could use bash string interpolation to pipe the output of codex exec "Write a good commit message for the current changes" and construct commands based on the output from codex. Right now the closest way to do this is to write to a file. Would it be possible to just output to stdout the last message when doing codex exec?