Three years of patchwork, rebuilt in four weeks.
The store had accumulated customizations from four different developers over three years. Cart drawer broken on mobile. Filter section hardcoded against a deprecated metafield. Theme updates blocked because every update undid a different custom section. We pulled the theme into a dev environment, audited every customization against the current theme version, rebuilt the sections that mattered using Prestige's native schema, and migrated what was worth keeping to theme app extensions so the next update doesn't break anything.