diff --git a/.gitea/workflows/pack.yaml b/.gitea/workflows/pack.yaml
index 744a82cd..2d15b379 100644
--- a/.gitea/workflows/pack.yaml
+++ b/.gitea/workflows/pack.yaml
@@ -6,6 +6,9 @@ on:
   repository_dispatch:
     types:
       - build-pack
+  schedule:
+    # Poll all source repos every 15 minutes; rebuild only if a component changed.
+    - cron: "*/15 * * * *"
   workflow_dispatch:
     inputs:
       force:
@@ -21,8 +24,43 @@ jobs:
       GITEA_REPO: ${{ gitea.repository }}
       TOKEN: ${{ secrets.GITEA_TOKEN }}
       PACK_VERSION: pack-$(date +%Y%m%d-%H%M)
+      FORCE: ${{ github.event.inputs.force }}
     steps:
+      - name: Check for upstream changes
+        id: check
+        run: |
+          set -e
+          exec 2>&1
+          # Map of repo -> ref to poll for the latest commit hash.
+          CMS_REF="$(git ls-remote https://gitlab.epicnabbo.nl/remco/EpicNext-Cms.git main 2>/dev/null | awk '{print $1}')"
+          CAT_REF="$(git ls-remote https://gitlab.epicnabbo.nl/remco/Epicnabbo-Catalogus-Updated-Daily.git Beta-3 2>/dev/null | awk '{print $1}')"
+          NITRO_REF="$(git ls-remote https://github.com/duckietm/Nitro-V3.git main 2>/dev/null | awk '{print $1}')"
+          RENDER_REF="$(git ls-remote https://github.com/duckietm/Nitro_Render_V3.git main 2>/dev/null | awk '{print $1}')"
+          EMU_REF="$(git ls-remote https://github.com/duckietm/Polaris-Emulator.git main 2>/dev/null | awk '{print $1}')"
+          COMBINED="${CMS_REF}:${CAT_REF}:${NITRO_REF}:${RENDER_REF}:${EMU_REF}"
+          echo "Current refs: $COMBINED"
+          STATE="/var/tmp/pack-refs.state"
+          PREV="$(cat "$STATE" 2>/dev/null || echo "")"
+          if [ "${FORCE:-false}" = "true" ]; then
+            echo "Force rebuild requested"
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          elif [ "$COMBINED" != "$PREV" ]; then
+            echo "Upstream change detected (was: $PREV)"
+            echo "changed=true" >> "$GITHUB_OUTPUT"
+          else
+            echo "No upstream changes since last pack"
+            echo "changed=false" >> "$GITHUB_OUTPUT"
+          fi
+          echo "$COMBINED" > "$STATE"
+
+      - name: Skip if unchanged
+        if: steps.check.outputs.changed != 'true'
+        run: |
+          echo "Nothing to rebuild. Exiting."
+          exit 0
+
       - name: Setup
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           exec 2>&1
@@ -32,6 +70,7 @@ jobs:
           echo "WORK=$WORK" >> "$GITHUB_ENV"
 
       - name: Pull CMS (this repo)
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           git clone --depth 1 "${{ gitea.server_url }}/${{ gitea.repository }}.git" "$WORK/src/cms" 2>/dev/null \
@@ -39,6 +78,7 @@ jobs:
           echo "cms: $(git -C "$WORK/src/cms" rev-parse --short HEAD 2>/dev/null)" | tee -a "$WORK/components.txt"
 
       - name: Pull Catalogus
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           git clone --depth 1 https://gitlab.epicnabbo.nl/remco/Epicnabbo-Catalogus-Updated-Daily.git "$WORK/src/catalogus" 2>/dev/null \
@@ -46,6 +86,7 @@ jobs:
           echo "catalogus: $(git -C "$WORK/src/catalogus" rev-parse --short HEAD 2>/dev/null)" | tee -a "$WORK/components.txt"
 
       - name: Pull Nitro-V3
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           git clone --depth 1 https://github.com/duckietm/Nitro-V3.git "$WORK/src/nitro" 2>/dev/null \
@@ -53,6 +94,7 @@ jobs:
           echo "nitro: $(git -C "$WORK/src/nitro" rev-parse --short HEAD 2>/dev/null)" | tee -a "$WORK/components.txt"
 
       - name: Pull Nitro-Render-V3
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           git clone --depth 1 https://github.com/duckietm/Nitro_Render_V3.git "$WORK/src/render" 2>/dev/null \
@@ -60,6 +102,7 @@ jobs:
           echo "render: $(git -C "$WORK/src/render" rev-parse --short HEAD 2>/dev/null)" | tee -a "$WORK/components.txt"
 
       - name: Pull Polaris Emulator
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           git clone --depth 1 https://github.com/duckietm/Polaris-Emulator.git "$WORK/src/emulator" 2>/dev/null \
@@ -67,6 +110,7 @@ jobs:
           echo "emulator: $(git -C "$WORK/src/emulator" rev-parse --short HEAD 2>/dev/null)" | tee -a "$WORK/components.txt"
 
       - name: Build Nitro-V3 client
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           cd "$WORK/src/nitro"
@@ -77,6 +121,7 @@ jobs:
           echo "nitro built" | tee -a "$WORK/build.txt"
 
       - name: Build Nitro-Render-V3
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           cd "$WORK/src/render"
@@ -87,6 +132,7 @@ jobs:
           echo "render built" | tee -a "$WORK/build.txt"
 
       - name: Build Polaris Emulator
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           cd "$WORK/src/emulator"
@@ -97,6 +143,7 @@ jobs:
           echo "emulator built" | tee -a "$WORK/build.txt"
 
       - name: Assemble Pack
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           cd "$WORK/out"
@@ -114,15 +161,12 @@ jobs:
           echo "Pack created: $(du -h "$PACK_FILE" | cut -f1)"
 
       - name: Build Changelog
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           BARE="/docker/gitea/gitea/git/repositories/remco/epicnext-cms.git"
           PREV="$(git -C "$BARE" tag --list 'pack-*' --sort=-creatordate | head -1 || echo '')"
-          if [ -n "$PREV" ]; then
-            CMS_LOG="$(git -C "$BARE" log --oneline --no-decorate "${PREV}..HEAD" 2>/dev/null || echo "")"
-          else
-            CMS_LOG="$(git -C "$BARE" log --oneline --no-decorate -5 2>/dev/null || echo "")"
-          fi
+          PREV_NOTE="${PREV:-initial}"
           {
             echo "## Site Pack ${PACK_VERSION}"
             echo ""
@@ -131,14 +175,19 @@ jobs:
             cat "$WORK/components.txt"
             echo '```'
             echo ""
-            echo "### CMS changes since ${PREV:-none}"
-            echo '```'
-            echo "${CMS_LOG:-none}"
-            echo '```'
+            echo "### Changes since pack ${PREV_NOTE}"
+            for pair in "cms:$WORK/src/cms" "catalogus:$WORK/src/catalogus" "nitro:$WORK/src/nitro" "render:$WORK/src/render" "emulator:$WORK/src/emulator"; do
+              label="${pair%%:*}"; repo="${pair##*:}"
+              echo "**${label}**"
+              echo '```'
+              git -C "$repo" log --oneline --no-decorate -10 2>/dev/null || echo "n/a"
+              echo '```'
+            done
           } > /tmp/pack-body.md
           cat /tmp/pack-body.md
 
       - name: Create Release + Upload Pack
+        if: steps.check.outputs.changed == 'true'
         run: |
           set -e
           BODY="$(jq -Rs '.' < /tmp/pack-body.md)"