The summary message generation without `git` and files collection

What feature would you like to see?

Currently, Codex at the end of it's work, in order to create a summary message, starts re-reading files, and running git command to see changed files.

I believe this is one of the token burning contributors, and it makes the codex slower to execute. At the same time, if I work in parallel on a feature or bug fix, I create uncommitted changes and sometimes Codex reverts my edits as it thinks that it didn't made them.

There should be a way to keep a list of changes by Codex somewhere locally, so it would not need to re-scan everything again.

Additional information

_No response_