Core Concepts

Modules

A module is the top-level unit. Top-level properties evaluate to an object-shaped value, and imports let one module reuse the values exported by another.

module demoname = "api"port = 8080

Objects

Objects are named member collections. Member lookup works for both explicit object literals and module results.

bird = new {  name = "hawk"}bird.name

Constraints

Pkl supports constraints as part of typed module design, including isBetween, isPositive, isGreaterThan, isLessThan, negation, and plain-function predicate factories.

const function above(n) = (x) -> x > nclass Service {  replicas: Int(above(0))}

Imports

Imports connect modules into a source graph. Keep imported modules small enough that the relationship is obvious from the importing file.