[BUG] The summary for resumed / compacted convesations is always "This session is being continued from a previo…" [sic]

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?

Any time I rewind history or use /compact, the summary of the conversation (as shown when trying to /resume it) becomes, verbatim: "This session is being continued from a previo…".

What Should Happen?

The summary should contain any useful description of what the conversation was about, rather than identical boilerplate which is the same for 90% of my convos.

Error Messages/Logs

> /resume 
     Modified     Created        Msgs Git Branch                                                                      Summary                                                                                                                
❯ 1. 12s ago      1m ago            8 -                                                                               This session is being continued from a previo…                                                                         
  2. 1m ago       2m ago           11 -                                                                               We're going to try to reprex a bug in your mi…
  3. 2m ago       3m ago            5 -                                                                               [epsilon] Do you have any context or is this…

Steps to Reproduce

1. Run /compact
2. Type a few messages
3. /reset new
4. /resume

Claude Model

None

Is this a regression?

No, this never worked

Last Working Version

_No response_

Claude Code Version

1.0.123 (Claude Code)

Platform

Anthropic API

Operating System

Other Linux

Terminal/Shell

VS Code integrated terminal

Additional Information

This issue was mentioned in passing in https://github.com/anthropics/claude-code/issues/6452, but I wanted to make a more specific bug report about the identical compacted-conversation messages in particular.

Similarly, https://github.com/anthropics/claude-code/issues/2112 would be a workaround for this bug -- but it would be ideal if the summarization could do something sensible automatically, so I consider this a distinct issue.