snapshot of https://github.com/shadcn-ui/ui.git (main, 2026-09-15; blobs > 131072B omitted)

apps/v4/registry/bases/README.md

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+# Registry bases (`base` and `radix`)
+
+This folder holds **two parallel registries**:
+
+- **`base/`** — Base UI–backed components and blocks  
+- **`radix/`** — Radix-backed components and blocks  
+
+## Keep them in sync
+
+For any **shared** surface (same preview block, same card, same example intent), changes should be applied to **both** `base` and `radix` variants.
+
+- Adjust only what must differ: imports (`.../base/ui/...` vs `.../radix/ui/...`) and primitive APIs.
+- Avoid editing only one tree unless the work is intentionally scoped to a single base.
+
+Project automation: see `.cursor/rules/registry-bases-parity.mdc` for the Cursor rule agents use when working under `apps/v4/registry/bases/`.