Porting Starlark to Pure Python with Claude Code (dbohdan.com)

A developer has successfully ported Starlark, a safe configuration language based on Python, from its original C implementation to pure Python, eliminating the need for dependencies like Go or Rust. Inspired by Simon Willison’s previous work on MicroQuickJS, which utilized Claude Code for translation, the developer leveraged the capabilities of Claude Opus 4.7 to create a guide that effectively streamlined the porting process. In just an hour, the initial port was completed with significant conformance, although some edge cases remain to be addressed later. This porting achievement is significant for the AI/ML community as it advances the realm of configuration languages, showing that Starlark can provide a more flexible and easier-to-debug alternative to YAML and Jinja templates commonly used in automation tools like Ansible. By using isolated Python code for configuration without inherent security risks, developers can build more robust systems. The implications of this work suggest that leveraging AI, particularly tools like Claude, can significantly reduce the complexity and effort involved in software translation efforts, opening the door for more widespread adoption of advanced languages like Starlark.