This tool can convert non-Cobalt 2.0.0 romfs mods to be Cobalt v1.0.0 compatible.
Get the latest version here.
Download the latest release and extract it anywhere. Then, have the mod folder you want to convert ready.
Note
The mod folder you want to convert should have a romfs in it.
For example, if your mod is My Awesome Mod, it should have the romfs in it like My Awesome Mod\romfs.
First, unzip cobalt migrator.
Then, drag the My Awesome Mod folder onto the .exe.
First, unzip cobalt migrator.
Then, using terminal, navigate to the folder where cobalt-migrator is, then run
./cobalt-migrator `<path to mod folder with romfs in it>`
If the conversion is successful, there will be a new version of your mod with (Cobalt) after the name, such as My Awesome Mod (Cobalt). You can then install it by following the instructions here