Pkl (pronounced Pickle) is an open-source programming language designed for creating configuration files. While static languages like JSON, YAML, and Property Lists have their merits, they often fall short when it comes to complex configurations. Pkl aims to solve this problem by combining the best aspects of a static language with those of a general-purpose programming language. It allows developers to use familiar features like classes, functions, conditionals, and loops to build abstraction layers and share code. Pkl also provides built-in validation through type annotations and constraints. The language can generate configuration data in various formats and can be embedded as a library in other applications. Pkl supports code generation for multiple languages and offers editor support through plugins like IntelliJ, VS Code, and neovim.
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https://pkl-lang.org/blog/introducing-pkl.html