Functions

core

Built-in. No import needed.

plus minus times over mod	arithmetic
eq neq lt gt lte gte	comparison
and or not	logical

math

math abs x	absolute value
math min x y	minimum
math max x y	maximum
math floor x	round down
math ceil x	round up
math round x	round nearest
math sqrt x	square root
math pow x y	power
math log x	natural log
math sin x	sine
math cos x	cosine
math random	0 to 1

str

str len s	length
str concat a b	join
str split s sep	split
str trim s	whitespace
str upper s	uppercase
str lower s	lowercase
str contains s sub	has substring
str replace s old new	replace all
str slice s start end	substring

list

list len l	length
list get l i	at index
list set l i v	set index
list push l v	append
list pop l	remove last
list first l	first element
list last l	last element
list slice l start end	sublist
list reverse l	reverse
list sort l	sort
list map l fn	transform
list filter l fn	keep matching
list reduce l fn init	fold

time

time now	unix ms
time date	ISO string
time parse s	parse string
time format t fmt	format
time year t	get year
time month t	get month
time day t	get day

err

err new msg	create error
err msg e	get message
err is x	check if error
err wrap e msg	add context

http

http get url	GET request
http post url body	POST request
http put url body	PUT request
http delete url	DELETE request
http patch url body	PATCH request
... with "H" "V"	add header
... auth bearer "tok"	Bearer auth
... auth basic "u" "p"	Basic auth

mcp

Model Context Protocol - three primitives: Tools (actions), Resources (data), Prompts (templates).

mcp tools url	list tools
mcp use url tool args	use a tool
mcp resources url	list resources
mcp read url uri	read resource
mcp prompts url	list prompts
mcp prompt url name args	get prompt
mcp init url	init session
mcp log url level	set log level

llm

llm claude prompt

Call Claude

json

json parse s	parse string
json string x	to JSON
json get x path	get field
json set x path v	set field
json has x path	field exists