Fish run recent command messed up when commands ran with Copilot

[anthonykim1]

Testing #286022

This one is interesting

Set "chat.tools.terminal.preventShellHistory": false then use fish shell.

How to repro (see the video too):

1. Run some command to run in terminal via copilot
2. Look at run recent command. It is fine
3. Run second command to run in terminal via copilot
4. 🐛 Run recent command polluted with welcome to fish...etc

copilotRunRecentSad.mov

The interesting thing is that when commands are ran manually run recent command is NOT polluted:

Screen.Recording.2026-01-06.at.9.03.47.AM.mov

Im not sure what the difference is between running command manually vs. via copilot, but surprised run recent command behaves differently.

Another interesting find:
Without starship run recent command are not polluted even when commands are ran via copilot:

Screen.Recording.2026-01-06.at.9.10.57.AM.mov

Maybe this is my issue🧐 starship somehow messing up? I noticed A and D are little off-position:

[Tyriar]

Something must be going wrong in the SI script as this is showing the prompt input model right?