STEM is Seele's take on subnet infrastructure. The protocol extends the security of the already fast Seele-Mainnet to supervise and credit an even faster Seele-Subnet. Subnets, powered by various token releasing mechanisms, supposedly assumes all the creative usages of a mainnet but faster.
The main parts consist of a contract, ran on mainnet, and a subnet, ran similarly to the mainnet. To ease interaction, a controller that wraps interaction with the contract and subnet is developed.
Below are detailed and concise graphs illustrating the relationship between parts.