Satako is a library for modding, it contains:
I use it in several mods of mine.
Also adds commands:
'summon2' - same as 'summon', but lets you specify namespace and name of the entity separately;
'give2' - same as 'give', but lets you specify namespace and name of the item separately;
'killall' - kills all entities of specified type, lets you specify namespace and name of the entity separately;
'removeall' - same as 'killall', but removes entities instead of killing them.
Satako has a function of displaying extended item information when Alt key is held.
My Discord server, where you can get faster support on any of my mods and get update announcements - https://discord.gg/MYxxMfctWx