diff --git a/.github/config/.files.yaml b/.github/config/.files.yaml
index 7804506535..7936145677 100644
--- a/.github/config/.files.yaml
+++ b/.github/config/.files.yaml
@@ -4,6 +4,7 @@
 # instead of matching only the project filter.
 ci: &ci
   - .github/workflows/build.yml
+  - .github/workflows/gradle-cache-prime.yml
   - .github/config/.files.yaml
 
 build: &build
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 631102bf9a..d35b2ee177 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -62,62 +62,9 @@ jobs:
           filters: .github/config/.files.yaml
 
   gradle-cache-prime:
-    environment:
-      name: ci-unsigned
-      deployment: false
-    name: Prime shared Gradle cache
-    if: needs.files-changed.outputs.project == 'true'
     needs: [files-changed]
-    runs-on: ubuntu-latest
-    timeout-minutes: 15
-    steps:
-      - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
-        with:
-          egress-policy: audit
-      - name: Checkout repository
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-
-      - name: Calculate Gradle cache key
-        id: gradle-cache-key
-        shell: bash
-        run: |
-          echo "key=gradle-v1-${{ runner.os }}-${{ runner.arch }}-jdk-25-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties', 'gradle/libs.versions.toml', 'buildSrc/**', 'settings.gradle', 'build.gradle', 'app/**/build.gradle', 'gradle/**/*.gradle') }}" >> "$GITHUB_OUTPUT"
-
-      - name: Cache Gradle (lookup-only)
-        id: cache-gradle-restore
-        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
-        with:
-          path: |
-            ~/.gradle/caches
-            ~/.gradle/wrapper
-          key: ${{ steps.gradle-cache-key.outputs.key }}
-          lookup-only: true
-
-      - name: Set up JDK 25
-        if: steps.cache-gradle-restore.outputs.cache-hit != 'true'
-        uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
-        with:
-          java-version: "25"
-          distribution: "temurin"
-
-      - name: Resolve backend dependencies
-        if: steps.cache-gradle-restore.outputs.cache-hit != 'true'
-        run: ./gradlew :stirling-pdf:classes --no-daemon
-        env:
-          STIRLING_FLAVOR: saas
-          MAVEN_USER: ${{ secrets.MAVEN_USER }}
-          MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
-          MAVEN_PUBLIC_URL: ${{ secrets.MAVEN_PUBLIC_URL }}
-
-      - name: Save cache Gradle User Home
-        if: steps.cache-gradle-restore.outputs.cache-hit != 'true'
-        uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
-        with:
-          path: |
-            ~/.gradle/caches
-            ~/.gradle/wrapper
-          key: ${{ steps.gradle-cache-key.outputs.key }}
+    uses: ./.github/workflows/gradle-cache-prime.yml
+    secrets: inherit
 
   build:
     if: needs.files-changed.outputs.backend == 'true'
diff --git a/.github/workflows/gradle-cache-prime.yml b/.github/workflows/gradle-cache-prime.yml
new file mode 100644
index 0000000000..b3700d8ac0
--- /dev/null
+++ b/.github/workflows/gradle-cache-prime.yml
@@ -0,0 +1,66 @@
+name: Prime Gradle Cache
+
+on:
+  workflow_call:
+  push:
+    branches: ["main"]
+
+permissions:
+  contents: read
+
+jobs:
+  gradle-cache-prime:
+    environment:
+      name: ci-unsigned
+      deployment: false
+    name: Prime shared Gradle cache
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+    steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+        with:
+          egress-policy: audit
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+
+      - name: Calculate Gradle cache key
+        id: gradle-cache-key
+        shell: bash
+        run: |
+          echo "key=gradle-v1-${{ runner.os }}-${{ runner.arch }}-jdk-25-${{ hashFiles('gradle/wrapper/gradle-wrapper.properties', 'gradle/libs.versions.toml', 'buildSrc/**', 'settings.gradle', 'build.gradle', 'app/**/build.gradle', 'gradle/**/*.gradle') }}" >> "$GITHUB_OUTPUT"
+
+      - name: Cache Gradle (lookup-only)
+        id: cache-gradle-restore
+        uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ steps.gradle-cache-key.outputs.key }}
+          lookup-only: true
+
+      - name: Set up JDK 25
+        if: steps.cache-gradle-restore.outputs.cache-hit != 'true'
+        uses: actions/setup-java@b6effb05e454b25005698d916606bdc6ffcbf961 # v5.7.0
+        with:
+          java-version: "25"
+          distribution: "temurin"
+
+      - name: Resolve backend dependencies
+        if: steps.cache-gradle-restore.outputs.cache-hit != 'true'
+        run: ./gradlew :stirling-pdf:classes --no-daemon
+        env:
+          STIRLING_FLAVOR: saas
+          MAVEN_USER: ${{ secrets.MAVEN_USER }}
+          MAVEN_PASSWORD: ${{ secrets.MAVEN_PASSWORD }}
+          MAVEN_PUBLIC_URL: ${{ secrets.MAVEN_PUBLIC_URL }}
+
+      - name: Save cache Gradle User Home
+        if: steps.cache-gradle-restore.outputs.cache-hit != 'true'
+        uses: actions/cache/save@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
+        with:
+          path: |
+            ~/.gradle/caches
+            ~/.gradle/wrapper
+          key: ${{ steps.gradle-cache-key.outputs.key }}