Opening new multi-file diff view?

[themightychris]

Is there any way for an extension to open the new built-in multi-file diff view as seen here?

Is there a particular URI syntax to vscode.diff that can achieve this or another command?

[tamuratak]

You can use the vscode.changes command, which was missing in the document. It has been added at microsoft/vscode-docs/issues/7790.