[FEATURE] Add config to automatically run "brew upgrade claude-code" in the background on new version and seamlessly resume session

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

Having the nag about a new version pop up so many times per week and doing the upgrade is annoying. copy, ctrl-c, paste, enter, wait, up arrow, enter. Takes the user out of the flow.

Proposed Solution

Have an auto-upgrade in background thing that when the upgrade completes it seamlessly restarts and resumes. I'm not watching the UI all the time anyway.

Alternative Solutions

1. Do it the same way as Codex where you can action it without highlight, copy, ctrl-c, paste, enter, wait, up arrow, enter

1. Just be smarter about showing it, like don't show it if the changes are so trivial that an upgrade is isn't really worth it.

Priority

Low

Feature Category

CLI commands and flags

Use Case Example

_No response_

Additional Context

_No response_