Shopify

Helix: The internal tool powering our Shopify app's native migrationshopify.engineering

Helix is Shopify’s internal LLM‑driven framework for migrating React Native screens to native iOS/Android. It breaks a screen into tiny, reviewable checkpoints and forces each through four strict gates—behavior tests via a CLI, Gemini‑powered visual diff, two adversarial code reviewers, and a final engineer sign‑off—while remembering feedback to become more autonomous over time.