diff --git a/.gitea/workflows/deploy-prod.yml b/.gitea/workflows/deploy-prod.yml
index 5db685ad..d7228c37 100644
--- a/.gitea/workflows/deploy-prod.yml
+++ b/.gitea/workflows/deploy-prod.yml
@@ -185,6 +185,25 @@ jobs:
           test -s "${ARTIFACT}.sha256" || { echo "ERROR: checksum file missing"; exit 1; }
           echo "✓ Checksum downloaded"
 
+      - name: Download Release Manifest
+        run: |
+          ARTIFACT="${{ steps.fetch.outputs.artifact }}"
+          TOKEN="${{ secrets.GITEA_TOKEN }}"
+          RELEASE_TAG="${{ steps.fetch.outputs.tag }}"
+          MANIFEST_URL="https://gitea.taxbaik.com/api/v1/repos/${{ env.REPO }}/releases/tags/${RELEASE_TAG}"
+
+          RELEASE=$(curl -sf --connect-timeout 10 --max-time 30 -H "Authorization: token $TOKEN" "$MANIFEST_URL")
+          MANIFEST_DOWNLOAD_URL=$(echo "$RELEASE" | jq -r '.assets[] | select(.name == "'"${ARTIFACT}"'.manifest.json") | .browser_download_url')
+
+          if [ -z "$MANIFEST_DOWNLOAD_URL" ] || [ "$MANIFEST_DOWNLOAD_URL" = "null" ]; then
+            echo "ERROR: No manifest asset found for release $RELEASE_TAG"
+            exit 1
+          fi
+
+          curl -sfL --connect-timeout 10 --max-time 120 -H "Authorization: token $TOKEN" -o "${ARTIFACT}.manifest.json" "$MANIFEST_DOWNLOAD_URL"
+          test -s "${ARTIFACT}.manifest.json" || { echo "ERROR: manifest file missing"; exit 1; }
+          echo "✓ Manifest downloaded"
+
       - name: Validate Release Checksum
         run: |
           ARTIFACT="${{ steps.fetch.outputs.artifact }}"
@@ -198,6 +217,38 @@ jobs:
           fi
           echo "✓ Artifact checksum verified"
 
+      - name: Validate Release Manifest
+        run: |
+          ARTIFACT="${{ steps.fetch.outputs.artifact }}"
+          python3 - <<'PY'
+          import json
+          import hashlib
+          import pathlib
+          import sys
+
+          artifact = pathlib.Path("${ARTIFACT}")
+          manifest = json.loads(pathlib.Path("${ARTIFACT}.manifest.json").read_text(encoding="utf-8"))
+          expected = {
+              "artifact": artifact.name,
+              "version": "${{ steps.fetch.outputs.tag }}",
+              "commit": "${{ steps.fetch.outputs.commit }}",
+          }
+
+          for key, value in expected.items():
+              if manifest.get(key) != value:
+                  print(f"ERROR: manifest {key} mismatch: {manifest.get(key)!r} != {value!r}")
+                  sys.exit(1)
+
+          actual_sha = hashlib.sha256(artifact.read_bytes()).hexdigest()
+          if manifest.get("sha256") != actual_sha:
+              print("ERROR: manifest sha256 mismatch")
+              print(f"Expected: {manifest.get('sha256')}")
+              print(f"Actual:   {actual_sha}")
+              sys.exit(1)
+
+          print("✓ Manifest verified")
+          PY
+
       - name: Setup SSH
         run: |
           mkdir -p ~/.ssh
diff --git a/.gitea/workflows/prepare-release.yml b/.gitea/workflows/prepare-release.yml
index 7d981329..5727aaa9 100644
--- a/.gitea/workflows/prepare-release.yml
+++ b/.gitea/workflows/prepare-release.yml
@@ -162,6 +162,30 @@ jobs:
           echo "✓ Checksum created: ${ARTIFACT}.sha256"
           cat "${ARTIFACT}.sha256"
 
+      - name: Generate Release Manifest
+        run: |
+          VERSION="${{ steps.metadata.outputs.version }}"
+          COMMIT="${{ steps.metadata.outputs.commit }}"
+          ARTIFACT="quantengine_${VERSION}.tar.gz"
+          CHECKSUM=$(cat "${ARTIFACT}.sha256")
+          python3 - <<PY
+          import json
+          import pathlib
+
+          payload = {
+              "version": "${VERSION}",
+              "commit": "${COMMIT}",
+              "artifact": "${ARTIFACT}",
+              "sha256": "${CHECKSUM}",
+          }
+          pathlib.Path("${ARTIFACT}.manifest.json").write_text(
+              json.dumps(payload, ensure_ascii=False, indent=2),
+              encoding="utf-8",
+          )
+          PY
+          echo "✓ Manifest created: ${ARTIFACT}.manifest.json"
+          cat "${ARTIFACT}.manifest.json"
+
       - name: Create Git Tag
         run: |
           VERSION="${{ steps.metadata.outputs.version }}"
@@ -225,6 +249,16 @@ jobs:
 
           echo "✓ Checksum attached: ${ARTIFACT}.sha256"
 
+          echo "Uploading manifest..."
+          curl -sf -X POST \
+            -H "Authorization: token ${GITEA_TOKEN}" \
+            -H "Content-Type: multipart/form-data" \
+            -F "attachment=@${ARTIFACT}.manifest.json" \
+            "${API}/repos/${REPO}/releases/${RELEASE_ID}/assets?name=${ARTIFACT}.manifest.json" \
+            -o /dev/null
+
+          echo "✓ Manifest attached: ${ARTIFACT}.manifest.json"
+
   notification:
     name: Release Notification
     runs-on: ubuntu-latest