Full documentation is available here. ( https://pyspigot.com/cmde-docs)

Commands are run via \ <command> [args...]. Multi-word arguments must be quoted: \ broadcast "Hello, world!" Sub-command results can be embedded inline using {$...}: \ broadcast "There are {$howmany @a} players online." Commands can be chained using as and if: \ as @a if ({$var vip_{$name @s}} == true) gamemode creative. Block comments are supported: /* this is a comment */