Jake4 is the earliest known person engaged in modding-related activities.
On or before 11th February 2019 while running a Minecraft server, they created a bot with basic actions. It was created in VisualBasic.NET in under 3 hours in order to easily create a GUI and Features include speaking and random moving. After creating this and learning enough about the packets they moved on
On the 12 February 2019, they created Boxcritters.org which is a BoxCritters Private Server using code from Experiment 1 with the original hamsters. The server is coded with PHP and the client HTML is just an extract of BoxCritters from February 2019.