diff --git a/.github/workflows/check-file.yml b/.github/workflows/check-file.yml
new file mode 100644
index 000000000000..b75b9e34d1f3
--- /dev/null
+++ b/.github/workflows/check-file.yml
@@ -0,0 +1,28 @@
+name: Files
+
+on:
+  merge_group:
+  pull_request:
+
+jobs:
+  check-expired:
+    name: EXPIRED FILE check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: npm run check:expired
+      - run: npm run _diff:fail
+
+  check-filenames:
+    name: FILENAME check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: npm run check:filenames
+
+  check-formatting:
+    name: FILE FORMAT
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - run: npm run check:format
diff --git a/.github/workflows/check-format.yml b/.github/workflows/check-format.yml
deleted file mode 100644
index e3227341e0e4..000000000000
--- a/.github/workflows/check-format.yml
+++ /dev/null
@@ -1,39 +0,0 @@
-name: Files
-
-on:
-  merge_group:
-  pull_request:
-
-jobs:
-  check-filenames:
-    name: FILENAME check
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-      - run: npm run check:filenames
-
-  check-formatting:
-    name: FILE FORMAT
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v4
-
-      - name: Create NPM cache-hash input file
-        run: |
-          mkdir -p tmp
-          jq '{devDependencies, engines, gitHubActionCacheKey}' package.json > tmp/package-ci.json
-
-      - uses: actions/setup-node@v4
-        with:
-          node-version-file: .nvmrc
-          cache: npm
-          cache-dependency-path: tmp/package-ci.json
-
-      - name: Install package(s)
-        run: |
-          PRETTIER_AT_VERS=@$(npm pkg get devDependencies.prettier | tr -d '^"')
-          echo "PRETTIER_AT_VERS=$PRETTIER_AT_VERS" | tee -a $GITHUB_ENV
-          npm install prettier$PRETTIER_AT_VERS --no-save
-          set -x && npx prettier --version
-
-      - run: npm run check:format
diff --git a/.github/workflows/check-spelling.yml b/.github/workflows/check-spelling.yml
index 23526674a692..eec394cfd882 100644
--- a/.github/workflows/check-spelling.yml
+++ b/.github/workflows/check-spelling.yml
@@ -26,16 +26,19 @@ jobs:
           suggestions: true
 
   dict-check:
-    name: CSPELL:IGNORE check
+    name: CSPELL page-local word list check
     runs-on: ubuntu-latest
+    env:
+      FIX_CMD: fix:dict
     steps:
       - uses: actions/checkout@v4
-      - run: npm run fix:dict
+      - run: npm run ${{ env.FIX_CMD }}
       - name: Any changed files?
         run: |
           CHANGES=`git status --porcelain`
           if [[ $CHANGES ]]; then
-            echo "Locally run `npm run fix:dict` and commit the changes:"
+            echo "Add comment '/fix:${{ env.FIX_CMD }}' to your PR in GitHub,"
+            echo "or locally run 'npm run ${{ env.FIX_CMD }}' and commit the changes:"
             echo "$CHANGES"
             exit 1
           else
diff --git a/package.json b/package.json
index 5b7ec69141cc..55a01729eca6 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,7 @@
   "scripts": {
     "__check:links": "make --keep-going check-links",
     "_build": "npm run _hugo -- -e dev --buildDrafts --buildFuture --baseURL \"${DEPLOY_PRIME_URL:-http://localhost}\"",
-    "__check:format": "npx prettier${PRETTIER_AT_VERS}",
+    "__check:format": "./scripts/npx-helper.sh prettier",
     "_check:format:any": "npm run __check:format -- --check --ignore-path ''",
     "_check:format:ja+zh": "npm run _check:format:nowrap -- content/ja content/zh",
     "_check:format:nowrap": "npm run _check:format:any -- --prose-wrap preserve",
diff --git a/scripts/npx-helper.sh b/scripts/npx-helper.sh
new file mode 100755
index 000000000000..57aa7d690ee6
--- /dev/null
+++ b/scripts/npx-helper.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+#
+# Runs the given command with npx, ensuring that the version of the
+# command/package as declared in `package.json` is first installed.
+
+if [ $# -eq 0 ]; then
+  echo "Usage: $0 [--no-ignore-scripts] <npm-command-and-package-name> [args...]"
+  exit 1
+fi
+
+npx_vers_from_pkg_json() {
+  local npm_i_flags="--no-save"
+  if [[ "$1" == "--no-ignore-scripts" ]]; then
+    shift
+  else
+    npm_i_flags+=" --ignore-scripts"
+  fi
+  local command=$1; shift;
+  # For now we assume that the package name is the same as the command name.
+  local package=$command
+  if ! [[ $package =~ ^[a-zA-Z0-9_-]+$ ]]; then
+    echo "ERROR: Invalid package name '$package'"
+    exit 1
+  fi
+  local args=$@
+
+  local version=$(npm pkg get devDependencies.$package | tr -d '^"')
+  if [[ $version == "{}" ]]; then
+    echo "ERROR: Could not determine version of '$package' from package.json"
+    exit 1
+  fi
+  local pkgAtVers="$package@$version"
+
+  if ! npm ls $pkgAtVers; then
+    (set -x; npm install $npm_i_flags $pkgAtVers)
+  fi
+  set -x && npx $pkgAtVers $args
+}
+
+npx_vers_from_pkg_json $@;