(I added Show HN to your title because that's the convention for sharing your work on HN - see https://news.ycombinator.com/showhn.html)

The approach of using general programming languages instead of YAML for CI/CD is refreshing. I've seen too many teams struggle with YAML's complexity and limitations in complex pipelines. Being able to write actual code with proper IDE support, testing, and debugging is a game-changer. The SDK approach is smart too - makes it extensible across languages. Have you considered integration with GitHub Actions beyond the existing ones? That would significantly expand the user base.