Keywords

Reserved identifiers, grouped by role. None of these can be used as a variable, parameter, or type name.

Declarations

Keyword	Purpose
let	Immutable binding
var	Mutable binding
fun	Function declaration
type	Type declaration
package	Package declaration
export	Export a top-level name from a package
import	Import a package or FFI module
extern	Declare an external (FFI) function or variable

Control flow

Keyword	Purpose
if	Conditional
else	Alternative branch
then	Inline if expression
for	Loop over a range or collection
in	Membership / iteration
while	Loop while a condition holds
break	Exit a loop
continue	Skip to the next iteration
return	Return from a function
match	Pattern-match expression
is	Type test in an expression or pattern

Errors

Keyword	Purpose
expect	Assertion (also used inside test blocks)
panic	Abort with an unrecoverable error
try	Begin an error-recovery block
catch	Recover from a try

Agents and streams

Keyword	Purpose
agent	Agent declaration
stream	Stream declaration
on	Event handler
emit	Emit an event
intent	Expose a callable endpoint

AI generation

Keyword	Purpose
generate	Open a generation block (generate text, generate embedding)
model	Model configuration block
tools	Function tools list inside a generate block

Data

Keyword	Purpose
load	Load a CSV / JSON / JSONL / YAML file
save	Save a list to a file
from	Begin a query
where	Filter clause
select	Projection clause
join, left join	Join clause
group by	Aggregation clause
sort by	Sort clause
skip, take	Slice clauses
to	Used with save
as	Type or format coercion (used in load, save, as json)

Testing

Keyword	Purpose
test	Test block

Literals

Keyword	Purpose
true	Boolean true
false	Boolean false
nil	The absent value

Set operators

Keyword	Purpose
union	Set / list union
intersect	Set / list intersection
except	Set / list difference
all	Used with union all to keep duplicates

Fetch

Keyword	Purpose
fetch	HTTP fetch expression
with	Options block on a fetch expression

Reserved but not yet used

Reserved for forthcoming features and unavailable as names today:

async, await, defer, interface, trait, where (as a type-bound), yield.

Next

• Operators for the operator table.
• Built-ins for prelude functions.
• Manual for tutorial-style introductions to each concept.