diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index a19b587..b0b2c79 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -4,8 +4,31 @@ on:
   pull_request:
 
 jobs:
+  changed_files:
+    name: Get Changed Files
+    runs-on: ubuntu-latest
+    outputs:
+      backend: ${{ steps.filter.outputs.backend }}
+      frontend: ${{ steps.filter.outputs.frontend }}
+      workflow: ${{ steps.filter.outputs.workflow }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Check for file changes
+        uses: dorny/paths-filter@v2
+        id: filter
+        with:
+          filters: |
+            backend:
+              - 'backend/**'
+            frontend:
+              - 'frontend/**'
+            workflow:
+              - '.gitea/workflows/**'
+
   checkstyle:
     name: "Checkstyle Main"
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.backend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: "cimg/openjdk:23.0-node"
     steps:
@@ -17,21 +40,43 @@ jobs:
           path: |
             ~/.gradle/caches
             ~/.gradle/wrapper
-          key: gradle-${{ runner.os }}-common
+            backend/build/reports/checkstyle
+          key: gradle-${{ runner.os }}-${{ hashFiles('backend/**/*.java', 'backend/config/checkstyle/checkstyle.xml') }}
           restore-keys: |
             gradle-${{ runner.os }}-
-      - name: "Prepare Gradle"
+      - name: "Check cache for checkstyle reports"
+        id: check-cache
+        run: |
+          if [ -d "backend/build/reports/checkstyle" ] && [ -f "backend/build/reports/checkstyle/main.xml" ]; then
+            echo "Cache hit! Using cached checkstyle results"
+            echo "cache-hit=true" >> $GITHUB_OUTPUT
+          else
+            echo "Cache miss! Running checkstyle check"
+            echo "cache-hit=false" >> $GITHUB_OUTPUT
+          fi
+      
+      - name: "Run checkstyle"
+        if: steps.check-cache.outputs.cache-hit != 'true'
         working-directory: ./backend
-        run: gradle clean
-      - name: "Check"
-        working-directory: ./backend
-        run: gradle checkstyleMain
+        run: |
+          gradle checkstyleMain
+          
+      - name: "Cache checkstyle results"
+        if: steps.check-cache.outputs.cache-hit != 'true'
+        uses: actions/upload-artifact@v4
+        with:
+          name: checkstyle-results
+          path: backend/build/reports/checkstyle
+          
       - name: "Stop Gradle"
+        if: steps.check-cache.outputs.cache-hit != 'true'
         working-directory: ./backend
         run: gradle --stop
 
   eslint:
     name: eslint
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.frontend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
@@ -58,6 +103,8 @@ jobs:
 
   prettier:
     name: prettier
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.frontend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
@@ -84,6 +131,8 @@ jobs:
 
   test-build:
     name: test-build
+    needs: changed_files
+    if: ${{ needs.changed_files.outputs.frontend == 'true' || needs.changed_files.outputs.workflow == 'true' }}
     container:
       image: catthehacker/ubuntu:act-latest
     steps:
diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index 596c53d..ab95401 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -3,6 +3,11 @@ on:
   push:
     branches:
       - "main"
+    paths:
+      - 'backend/**'
+      - 'frontend/**'
+      - '.gitea/workflows/release.yml'
+      - 'release.config.cjs'
 
 env:
   GITEA_TOKEN: ${{ secrets.GITEA_TOKEN }}
diff --git a/backend/a b/backend/a
new file mode 100644
index 0000000..e69de29