Built-ins

Core builtins

• prn - print
• len - length
• str - to string
• int - to integer
• typ - type tag (num, str, lst, obj, bol, nil, fun, bif)
• try - structured errors / results
• err - raise error
• asr - assert (raises if condition is falsey)

Host interface

File I/O, TCP, HTTP, crypto hooks, and other platform entry points use the exact names and signatures in the syscall ABI. Implement those in a conforming host to unlock the full standard library.