Updates in another CLI instance cause existing instances to break

[ArcticZeroo]

Describe the bug

If I am currently running github copilot in one window, then run npx -y @github/copilot from another terminal window, and that second run causes github copilot to get updated, the older version gets cleaned off disk and the agent breaks unexpectedly.

This happened in 3 different terminal windows for me (working on different tasks in different folders):

Affected version

1.0.2

Steps to reproduce the behavior

1. Start an older version of the CLI in one tab, have it start working on a long-running task with many steps
2. Start a newer version in another tab
3. First tab will eventually die due to missing ripgrep or a worker.js or something

Expected behavior

Older tab stays alive until close, where it is cleaned up. Or the newer tab just doesn't upgrade and uses the older version but shows me /upgrade.

Additional context

Windows 11 in Windows Terminal.