You'll notice
The resume/rewind picker can now show a custom description instead of the default summary.
The session resume/rewind picker now accepts a confirmDescription prop. Choosing "nevermind" shows a fixed note that the conversation will be unchanged, while other selections can show a caller-supplied description in place of the default restore-option summary.
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Anthropic's release notes agree
Fixed /rewind and --rewind-files reporting success when checkpoint backup files were missing and nothing was actually restored