diff --git a/.github/workflows/dev.yml b/.github/workflows/dev.yml
index 0ee668e..425e539 100644
--- a/.github/workflows/dev.yml
+++ b/.github/workflows/dev.yml
@@ -1,3 +1,4 @@
+# make sure the build works and doesn't produce spurious changes
 name: dev
 
 on:
@@ -6,10 +7,7 @@ on:
 
 jobs:
   check:
-    strategy:
-      matrix:
-        os: [ubuntu-latest, macos-latest, windows-latest]
-    runs-on: ${{ matrix.os }}
+    runs-on: ubuntu-latest
     steps:
     - name: Checkout sources
       uses: actions/checkout@v2
@@ -17,19 +15,10 @@ jobs:
       run: |
         npm install
         npm run all
-    - name: Test wrapper
-      uses: ./
-      with:
-        wrapper-directory: __tests__/data/basic
-        build-root-directory: __tests__/data/basic
-        dependencies-cache-enabled: true
-        configuration-cache-enabled: true
-        arguments: test
-    - name: Test dist download
-      uses: ./
-      with:
-        gradle-version: 6.6-milestone-1
-        build-root-directory: __tests__/data/basic
-        dependencies-cache-enabled: true
-        configuration-cache-enabled: true
-        arguments: test --configuration-cache
+    - name: Check for uncommitted changes
+      # Ensure no changes, but ignore node_modules dir since dev/fresh ci deps installed.
+      run: |
+        git diff --exit-code --stat -- . ':!node_modules' \
+        || (echo "##[error] found changed files after build. please 'npm run all'" \
+                 "and check in all changes" \
+            && exit 1)
diff --git a/.github/workflows/prod.yml b/.github/workflows/prod.yml
index 2e44205..9976abb 100644
--- a/.github/workflows/prod.yml
+++ b/.github/workflows/prod.yml
@@ -2,10 +2,8 @@
 name: prod
 
 on:
+  pull_request:
   push:
-    branches:
-      - master
-      - 'releases/*'
 
 jobs:
   check: