diff --git a/.gitea/workflows/release.yml b/.gitea/workflows/release.yml
index d5dd040..856271f 100644
--- a/.gitea/workflows/release.yml
+++ b/.gitea/workflows/release.yml
@@ -166,3 +166,61 @@ jobs:
               -H "Content-Type: application/octet-stream" \
               --data-binary @"$path"
           done
+
+  update-manifest:
+    needs: [build-windows, build-linux]
+    runs-on: ubuntu-latest
+    env:
+      GITEA_URL: https://code.lotusguild.org
+      REPO: LotusGuild/cinny-desktop
+    steps:
+      - name: Generate and upload release.json
+        env:
+          TOKEN: ${{ secrets.RELEASE_TOKEN }}
+        run: |
+          BASE="$GITEA_URL/LotusGuild/cinny-desktop/releases/download/latest"
+
+          WIN_SIG=$(curl -sf "$BASE/LotusChat-x86_64-setup.nsis.zip.sig")
+          LINUX_SIG=$(curl -sf "$BASE/LotusChat-x86_64.AppImage.tar.gz.sig")
+
+          RELEASE=$(curl -sf "$GITEA_URL/api/v1/repos/$REPO/releases/tags/latest" \
+            -H "Authorization: token $TOKEN")
+          RELEASE_ID=$(echo "$RELEASE" | python3 -c "import sys,json; print(json.load(sys.stdin)['id'])")
+          VERSION=$(echo "$RELEASE" | python3 -c "import sys,json; print(json.load(sys.stdin)['name'].split()[-1])")
+          DATE=$(date -u +%Y-%m-%dT%H:%M:%SZ)
+
+          python3 -c "
+import json, sys
+manifest = {
+    'version': '$VERSION',
+    'notes': 'Latest Lotus Chat release',
+    'pub_date': '$DATE',
+    'platforms': {
+        'windows-x86_64': {
+            'url': '$BASE/LotusChat-x86_64-setup.nsis.zip',
+            'signature': '''$WIN_SIG'''
+        },
+        'linux-x86_64': {
+            'url': '$BASE/LotusChat-x86_64.AppImage.tar.gz',
+            'signature': '''$LINUX_SIG'''
+        }
+    }
+}
+print(json.dumps(manifest, indent=2))
+" > release.json
+
+          cat release.json
+
+          # Delete old manifest asset if present
+          OLD=$(curl -sf "$GITEA_URL/api/v1/repos/$REPO/releases/$RELEASE_ID/assets" \
+            -H "Authorization: token $TOKEN" \
+            | python3 -c "import sys,json; print(next((str(a['id']) for a in json.load(sys.stdin) if a['name']=='release.json'), ''))" 2>/dev/null || true)
+          [ -n "$OLD" ] && curl -sf -X DELETE \
+            "$GITEA_URL/api/v1/repos/$REPO/releases/$RELEASE_ID/assets/$OLD" \
+            -H "Authorization: token $TOKEN" || true
+
+          curl -sf -X POST \
+            "$GITEA_URL/api/v1/repos/$REPO/releases/$RELEASE_ID/assets?name=release.json" \
+            -H "Authorization: token $TOKEN" \
+            -H "Content-Type: application/json" \
+            --data-binary @release.json