Add Windows troubleshooting for SSH agent conflicts

Add guidance for resolving passphrase prompts caused by Git for Windows using a different SSH client than the Windows ssh-agent.

Author: BlackDoubleB

content/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent.md

@@ -162,6 +162,18 @@ Before adding a new SSH key to the ssh-agent to manage your keys, you should hav
    ```powershell
    ssh-add c:/Users/YOU/.ssh/id_ed25519
    ```
+> [!TIP]
+> **Troubleshooting SSH agent conflicts in Windows**
+>
+> In Windows environments, the native Windows OpenSSH implementation and the one included with Git for Windows (based on MSYS2/Bash) can coexist.
+>
+> If you configure and save your passphrases in the Windows agent using PowerShell, Git may still prompt you for your passphrase during operations like `git push`. This can happen when Git for Windows uses its bundled `ssh.exe` (from MSYS2) instead of the Windows system OpenSSH client, and therefore can't talk to the Windows `ssh-agent` service.
+>
+> To ensure Git uses the agent where you've stored your credentials, force Git to use the system's SSH binary by running:
+>
+> ```powershell
+> git config --global core.sshCommand "C:/Windows/System32/OpenSSH/ssh.exe"
+> ```
 
 {% data reusables.ssh.add-public-key-to-github %}