[BUG] GitButler diff stat counts appear inflated/incorrect in status bar

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?

Title: GitButler diff stat counts appear inflated/incorrect in status bar

Environment:

Claude Code CLI, GitButler integration (gitbutler/workspace branch)
OS: Windows 11
Repo: private C++/Qt project (details withheld for IP reasons)

Description:
The diff stat summary shown in the status bar/header (e.g. +2,285 −124) does not match the actual scope of changes made in the session. The discrepancy appears specific to GitButler's virtual branch/lane view.

What Should Happen?

Expected: Stat counts reflect only the actual lines changed in the current session/lane.
Actual: Stat counts appear significantly inflated.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

Work in a repo with GitButler initialized, using a virtual branch/lane (gitbutler/workspace).
Make a set of edits via Claude Code.
Observe the diff stat counter in the status bar.
Compare against the expected line-change count for the edits made.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.252 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_