diff --git a/.github/actions/ci-setup/action.yml b/.github/actions/ci-setup/action.yml
index dfe56eb0..951d4e82 100644
--- a/.github/actions/ci-setup/action.yml
+++ b/.github/actions/ci-setup/action.yml
@@ -4,7 +4,7 @@ runs:
   using: composite
   steps:
     - name: Setup Node.js
-      uses: actions/setup-node@v6
+      uses: actions/setup-node@53b83947a5a98c8d113130e565377fae1a50d02f # v6.3.0
       with:
         node-version-file: ".node-version"
         cache: yarn
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 386f643f..05cde2cc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,26 +1,46 @@
-name: Node CI
+name: CI
 
 on:
-  push:
-    branches:
-      - main
   pull_request:
+  push:
+    branches: [main]
+  merge_group:
+    branches: [main]
+
+permissions:
+  contents: read
 
 jobs:
-  build:
+  test:
+    name: Test
     timeout-minutes: 20
-
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
-        with:
-          ref: ${{ github.event.pull_request.head.sha }}
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: ./.github/actions/ci-setup
+
+      - name: Test
+        run: yarn test
 
+  typecheck:
+    name: Typecheck
+    timeout-minutes: 20
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./.github/actions/ci-setup
 
       - name: Typecheck
         run: yarn typecheck
 
-      - name: Test
-        run: yarn test
+  ci-ok:
+    name: CI OK
+    runs-on: ubuntu-latest
+    if: always()
+    needs: [test, typecheck]
+    steps:
+      - name: Exit with error if some jobs are not successful
+        run: exit 1
+        if: ${{ always() && (contains(needs.*.result, 'failure') || contains(needs.*.result, 'skipped') || contains(needs.*.result, 'cancelled')) }}
diff --git a/.github/workflows/release-pr.yml b/.github/workflows/release-pr.yml
index eecbc210..31d21afc 100644
--- a/.github/workflows/release-pr.yml
+++ b/.github/workflows/release-pr.yml
@@ -36,7 +36,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: release_check
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./.github/actions/ci-setup
 
       - name: Checkout pull request
diff --git a/.github/workflows/version-or-publish.yml b/.github/workflows/version-or-publish.yml
index 2e046dfb..4e7f070c 100644
--- a/.github/workflows/version-or-publish.yml
+++ b/.github/workflows/version-or-publish.yml
@@ -11,7 +11,7 @@ jobs:
   changesets:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
       - uses: ./.github/actions/ci-setup
 
       - name: Build