After Claude Code runs a bash or git command, it can now show a diff view (a summary of what changed) listing files that were created, updated, or deleted, along with per-file line-count changes and the actual changed lines (hunks). If two commands ran in the same repository at the same time, it shows a note explaining that a change made by either one may show up under either result, since it can't always tell which command caused which change. A disclaimer also makes clear this view is a convenience summary of what the command changed, not a review or audit of the command itself.
This makes it easier to see the effect of a command at a glance, without having to run git diff yourself, while being explicit that it's not a substitute for actually checking what a command did.