test: add registry consumer smoke coverage

docs/registry.md

@@ -37,6 +37,15 @@ pnpm registry:check
 The pull request workflow now runs `pnpm registry:check`, and the release version PR
 workflow refreshes the registry automatically via `pnpm release:version`.
 
+To validate the end-to-end consumer flow locally:
+
+```bash
+pnpm test:registry:consumer
+```
+
+That smoke test creates a temporary app, runs the registry installer, installs the
+required dependencies, and verifies that the copied source both typechecks and builds.
+
 ## Consumer install flow
 
 ### 1. Pin the Cadence UI source

docs/releasing.md

@@ -78,6 +78,7 @@ Use the docs and smoke checks when the change touches behavior-heavy UI:
 
 ```bash
 pnpm build:docs
+pnpm test:registry:consumer
 pnpm test:e2e:smoke
 ```
 
@@ -166,6 +167,15 @@ pnpm registry:check
 
 This prevents registry metadata drift from merging unnoticed.
 
+The repo also runs:
+
+```bash
+pnpm test:registry:consumer
+```
+
+This verifies that the committed registry snapshot can still install into a fresh
+consumer app, typecheck, and build.
+
 ### Version PR workflow
 
 The `Release Version PR` workflow runs on pushes to `main` and on manual dispatch. It: