square/kotlinpoet

Provides a fluent builder API for programmatically constructing Kotlin code with full support for classes, functions, properties, annotations, and type specifications. Uses a compositional object model where code elements are represented as immutable data structures, enabling precise control over formatting, imports, and code generation. Commonly used in annotation processors, code generators, and build-time tools within the JVM ecosystem.

4,129 stars. Actively maintained with 15 commits in the last 30 days.