Where on the web is Loki's install manifest file? I want to compare it with the current build to see what I have installed?
Or is there another way?
There's another easy way to know the installed packages in your system.
apt list --installedto see what packages you have installed in your elementary OS.
apt list --installed | lessit will wait for you to press Enter. And after you press Enter, it will be showing / loading package name one-by-one.
grep <package_name>to achieve this. For example,
apt list --installed | grep 'language'will list every package installed in your system with "language" keyword in its name.
And to get the list of the apps/packages you manually installed please execute,
comm -23 <(apt-mark showmanual | sort -u) <(gzip -dc /var/log/installer/initial-status.gz | sed -n 's/^Package: //p' | sort -u).