github.com/aymanbagabas/go-osc52 (go): OSC52 is a terminal escape sequence that allows copying text to the clipboard.  The sequence consists of the following:  Pc is the clipboard choice:  Pd is the data to copy to the clipboard. This string should be encoded in base64 (RFC-4648).  If Pd is "?", the terminal replies to the host with the current contents of the clipboard.  If Pd is neither a base64 string nor "?", the terminal clears the clipboard.  See https://invisible-island.net/xterm/ctlseqs/ctlseqs.html#h3-Operating-System-Commands where Ps = 52 => Manipulate Selection Data.
Keywords: ansi|osc|ssh|terminal