[BUG] Rewind broken in Claude Desktop 1.11187.4 — "rewind target not on CLI's active chain"

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?

When I try to rewind (double-press Esc or click a checkpoint in the timeline),
Claude Desktop shows "Couldn't rewind — That point in the conversation couldn't
be found." The rewind fails silently and the checkpoint is discarded. This
happens on every session, every checkpoint attempt.

The error chain:

1. Desktop UI sends a checkpoint message UUID to the CLI
2. CLI responds: "No message found with message.uuid of: <uuid>"
3. Desktop logs: "Clearing stale pendingRewindTo ... — rewind target not on

CLI's active chain"

1. Desktop shows the "Couldn't rewind" error to the user

What Should Happen?

Rewind should fork the session at the selected checkpoint and resume the
conversation from that point.

Error Messages/Logs

[error] Session local_febc6d86-... CLI stderr tail:
No message found with message.uuid of: c73ec2e1-0428-43fb-a168-f6f75b9dbf4c

[info] [CCD] Clearing stale pendingRewindTo c73ec2e1-0428-43fb-a168-f6f75b9dbf4c
       for session local_febc6d86-b5f6-43bf-9709-9db63365c6af
       — rewind target not on CLI's active chain

[info] Using Claude Code binary at: ...\claude-code\2.1.165\claude.exe
[info] Loaded 315 transcript messages for session local_febc6d86-...

(A second identical failure occurred with session local_ccd0d737-... 
and message UUID 673fc26d-...)

Steps to Reproduce

1. Open Claude Desktop 1.11187.4 with any existing session
2. Double-press Esc or click any checkpoint in the conversation timeline
3. "Couldn't rewind" error appears immediately
4. Check %LOCALAPPDATA%\Claude-3p\logs\main.log for the error chain above

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

Desktop 1.9255.0 + CLI 2.1.149

Claude Code Version

2.1.169 (Claude Code)

Platform

Other

Operating System

Windows

Terminal/Shell

Other

Additional Information

This is a Desktop bug, not a CLI bug. The Desktop-to-CLI coordination
protocol for rewind appears broken in 1.11187.4. The same bug reproduces
with CLI 2.1.165 and 2.1.169 — the issue follows the Desktop version.

main.log