The old Skype for Linux app stores its logs as a simple sqlite database from which you can export them fairly straightforwardly, see e.g. https://pastebin.com/b

The old Skype for Linux app stores its logs as a simple sqlite database from which you can export them fairly straightforwardly, see e.g. https://pastebin.com/bWXCQK83 https://pastebin.com/bWXCQK83 for a simple script which brings them into Pidgin's log format.