A literate language.
Lisp structures, lisp manipulation. PicoLisp.
Syntax is the DOM. Only datatypes allowed are those serialisable into JSON.
(Sets can be collection of behaviours on top of [].)
Octavo as an IDE.
Perhaps the "definition" to things could be lost between functions. You could use something like strict typing in order to get it back. Pseudostrict typing.
The "a" in "Ursa" stands for "Arnia was right".
Encourage JSON IPC and RPC endpoints.