[Bug]: Race condition on branch rename stops execution of prompt

### Platform

macOS

### Operating system version

macOS Tahoe 26.2

### System architecture

ARM64 (M1, M2, etc)

### PolyScope Version

.8

### Bug description

Seem to have run into some kind of race condition. I supplied my prompt and the system renamed my branch but then stopped stating Ready for the next task.

### Steps to reproduce

_No response_

### Relevant log output

```shell

```

Start by reproducing the prompt execution flow on macOS Tahoe 26.2 with PolyScope .8, focusing on the point where the branch is renamed and execution stops. The report provides no reproduction steps or log output, so done means identifying the race and confirming that the prompt continues after the branch rename.

索引モデルが issue の本文から書いたものです。