Bitwarden SSH agent: "error: Couldn't get agent socket?" when signing Git commits

[adrianghc]

Steps To Reproduce

While SSH authentication when using Bitwarden as SSH agent works, I haven't managed to get Git commit signing to work yet. I have followed the instructions, the Git config is set, but I receive the following error when signing a commit:

error: Couldn't get agent socket?

fatal: failed to write commit object

How to reproduce:

1. Set up Git and Bitwarden as per the instructions on the web.
2. Create a Git commit.

Expected Result

The commit should be created and signed with the key set in the user.signingkey value of the Git config.

Actual Result

git commit results in the following error:

error: Couldn't get agent socket?

fatal: failed to write commit object

Screenshots or Videos

No response

Additional Context

No response

Operating System

Windows

Operating System Version

10.0.26100.3194

Installation method

Direct Download (from bitwarden.com)

Build Version

2025.1.4

Issue Tracking Info

• I understand that work is tracked outside of GitHub. A PR will be linked to this issue should one be opened to address it, but Bitwarden doesn't use fields like "assigned", "milestone", or "project" to track progress.

[bitwarden-bot]

Thank you for reporting this issue! We've added this to our internal tracking system.
ID: PM-18232

[daniellbw]

Hi there,

I am unable to reproduce this issue, it has been escalated for further investigation. If you have more information that can help us, please add it below.

Thanks!

[webalexeu]

I've the same issue on my side

Operating System
Windows

Operating System Version
10.0.26100.3194

Installation method
Winget

Build Version
2025.2.0

That's my .gitconfig

[user]
        signingkey = "[MASKED]"
[core]
	sshCommand = C:/Windows/System32/OpenSSH/ssh.exe
[gpg]
        format = ssh
[commit]
        gpgsign = true

Let me know if there is any logs or actions to perform to ease the troubleshooting