Describe the bug
/copy fails under WSL2/WSLg with Failed to copy to clipboard: Error: clip.exe exited with code 1 . But echo test | clip.exe reliably works, including from the repository and with Unicode/large input. The bundled native clipboard module fails first because WSLg’s Wayland compositor lacks ext-data-control / wlr-data-control ; forcing X11 by unsetting WAYLAND_DISPLAY makes native clipboard copy work. The CLI’s clip.exe fallback appears to invoke clip.exe incorrectly, likely passing text as an argument instead of stdin.
Affected version
GitHub Copilot CLI 1.0.80.
Steps to reproduce the behavior
- Launch WSL from Windows.
- From WSL, start a copilot-cli session.
- Send copilot a prompt and wait for a response.
- Use the
/copy command to copy the copilot response to the clipboard.
- Observe the following error message:
Failed to copy to clipboard: Error: clip.exe exited with code 1
Expected behavior
No new Copilot output, but the latest Copilot response gets copied to the clipboard a.k.a. copy/paste buffer, ready to paste elsewhere.
Additional context
My actual use-case is more deeply nested than this. I'm running Kubuntu 26.04 on a laptop, then launching a Windows VDI via Citrix Workspace. I run WSL from within the Windows VDI, and GitHub Copilot from within WSL.
Describe the bug
/copyfails under WSL2/WSLg withFailed to copy to clipboard: Error: clip.exe exited with code 1. Butecho test | clip.exereliably works, including from the repository and with Unicode/large input. The bundled native clipboard module fails first because WSLg’s Wayland compositor lacks ext-data-control / wlr-data-control ; forcing X11 by unsettingWAYLAND_DISPLAYmakes native clipboard copy work. The CLI’s clip.exe fallback appears to invoke clip.exe incorrectly, likely passing text as an argument instead of stdin.Affected version
GitHub Copilot CLI 1.0.80.
Steps to reproduce the behavior
/copycommand to copy the copilot response to the clipboard.Failed to copy to clipboard: Error: clip.exe exited with code 1Expected behavior
No new Copilot output, but the latest Copilot response gets copied to the clipboard a.k.a. copy/paste buffer, ready to paste elsewhere.
Additional context
My actual use-case is more deeply nested than this. I'm running Kubuntu 26.04 on a laptop, then launching a Windows VDI via Citrix Workspace. I run WSL from within the Windows VDI, and GitHub Copilot from within WSL.