Pkl Blog

One of the main points of using Pkl is to describe what your configuration looks like. An often overlooked design goal (arguably, the most important), is to forbid invalid configurations. Pkl types allow a great degree of freedom and power in constraining what your data looks like.

In many languages, function and method parameters may be assigned default values allowing the argument to be omitted in calls. Many languages also offer named parameters, which aid in API self-documentation. Pkl methods do not provide either feature, but one way to achieve similar results is the "class-as-a-function" (CaaF) pattern.

Today, we launch Pkl Evolution, a new repository that holds Suggested Pkl Improvements, Changes, or Enhancements (SPICEs) for Pkl’s language, tooling, and ecosystem.

Pkl files are programs that get evaluated to produce a result. Like any other program, it can be useful to have tests that verify their business logic. To address this, Pkl provides tooling for writing and running tests.

We are delighted to announce the open source first release of Pkl (pronounced Pickle), a programming language for producing configuration.