Upgrade cleanup: real engine cache generated by three base AppImage shim calls
Before head command : 50 files; 9804 KiB; directories: server, v0-evidence, v24.22.1-x64-e015eff9-1000
Head command exit: 1
No running T3 Code server uses <isolated-home>/app. Start T3 Code, then retry.

After head command : 1 files; 12 KiB; directories: server
server/preserve.txt: synthetic evidence sentinel