diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 98ac1a4..0548efe 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -85,3 +85,10 @@ jobs:
         run: xvfb-run -a npm run test:vscode -- --version ${{ matrix.vscode-version }}
         env:
           DISPLAY: ":99.0"
+
+      # Packaging runs vscode:prepublish, which re-runs the whole check chain.
+      # Doing it here — after the E2E download has populated .vscode-test —
+      # mirrors the order publish.yml uses, so a release-only break surfaces on
+      # the PR instead of at publish time.
+      - name: Package VSIX (mirrors publish.yml ordering)
+        run: npx @vscode/vsce package --no-update-package-json --out tailwind-stash.vsix
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index b18c7ef..f40c374 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -36,6 +36,7 @@ jobs:
 
       - run: npm run format:check
       - run: npm run lint
+      - run: npm run typecheck
       - run: npm run compile
       - run: npm run test:unit
 
diff --git a/vitest.config.ts b/vitest.config.ts
index 1f07d03..6056fa7 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -26,7 +26,10 @@ export default defineConfig({
         statements: 90,
       },
     },
-    exclude: ["test/vscode-e2e/**", "out/**", "node_modules/**"],
+    // .vscode-test holds the VS Code builds the E2E suite downloads, and those
+    // ship their own *.test.mts files. Without this, any vitest run that happens
+    // after an E2E run collects them and fails on "No test suite found".
+    exclude: ["test/vscode-e2e/**", "out/**", "node_modules/**", ".vscode-test/**"],
     globals: true,
   },
 })