Worked on Shopify/theme-tools and Shopify/theme-liquid-docs to enhance theme development workflows and validation systems. Established consistent local environments by pinning tooling versions with dev.yml and improved quality gates through updated PR templates and automated testing. Developed and refined the ValidVisibleIf validation system for Liquid schema, introducing robust error handling, range calculations, and safeguards against false positives. Expanded visible_if support in Liquid theme schemas to enable more dynamic customization, with comprehensive test coverage to ensure reliability. Leveraged TypeScript, JavaScript, and JSON Schema Validation to deliver features that reduce runtime errors and accelerate safe feature delivery across theme projects.