Lea

Lea is a functional programming language designed around left-to-right data flow using the pipe operator. It emphasizes readable, composable code by chaining operations naturally rather than nesting function calls. The language includes immutable bindings by default, decorators for adding behavior to functions, built-in async/await support, and an interactive REPL with tutorials.

Lea treats pipelines as first-class values that can be stored, composed, and manipulated using pipeline algebra. It supports reversible functions, reactive pipelines that recompute automatically, and optional strict type checking. The maker says it was built with Claude Code, and includes a VSCode extension for syntax highlighting.