so it seems there is a race when new worktree is used + custom agent.

so it seems there is a race when new worktree is used + custom agent. if worktree is not ready before copilot trying to read the custom agent, session fails.

---
| Field | Value |
| --- | --- |
| App version | 1.1.20 |
| OS | Windows 10.0.26200 |
| Theme | GitHub |
| Path | /chat |
| Tenure | Week 10 |