[BUG] Cannot scroll back past start of Claude

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

I switched from my old laptop to a new one a couple of days ago. I have copied over everything exactly as it was, but I reinstalled Claude and some other utilities, and ended up with a slightly newer version.

In the past, I was able to run some commands, start Claude, scroll back and examine the output etc of those commands, and continue to use Claude. I find that after I switched computers, I was no longer able to do that.

With the help of Claude, I discovered a workaround, but it implored me to report this as a bug.

It is _possible_ that something on my old computer affected this behavior, but me and Claude both have examined pretty much every nook and cranny and come up with no alternate explanation to this behavior change. In particular, on the old computer, I tried /terminal-setup briefly when Claude told me to, but quickly reverted it when I found out that it basically broke my Swedish keyboard (see #1793), and so I have not tried that again on the new computer.

What Should Happen?

Claude should allow me to scroll back, or at least have a documented way to control this behavior.

Error Messages/Logs

Steps to Reproduce

Run Claude. Attempt to scroll back past the start of the Claude session.

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.0.27 (Claude Code)

Claude Code Version

2.0.28 (Claude Code)

Platform

AWS Bedrock

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

The workarounds Claude proposed, with some hesitation and speculation, was to run with TERM=vt100 or TERM_PROGRAM_INHIBIT_ALTSCREEN=1. I have preferred the latter.