diff --git a/.gitignore b/.gitignore
index adc9573..b4f105f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -33,3 +33,6 @@ Thumbs.db
 
 # xgit binary (generated)
 xgit
+
+# Server-only deploy state (NICHT committen — wird vom deploy.sh gepflegt)
+.last-deployed-sha
diff --git a/scripts/deploy.sh b/scripts/deploy.sh
index 73956a8..7c85193 100755
--- a/scripts/deploy.sh
+++ b/scripts/deploy.sh
@@ -51,6 +51,71 @@ CI=true "${PNPM_BIN}" install --frozen-lockfile 2>&1 || {
 }
 log "pnpm install done"
 
+# 2.5 Prisma-Migration auto-deploy wenn neue migration-files committed wurden
+#     Detect via git diff zwischen .last-deployed-sha und HEAD.
+#     Idempotent: prisma migrate deploy skipped already-applied migrations.
+#     Failure-Mode: bei Migration-Fehler pm2 NICHT restarten (alter Code/alte DB konsistent).
+#     First-deploy-Edge-Case: wenn .last-deployed-sha fehlt → Migration ausführen (sicher
+#     weil idempotent).
+log "Step 2.5: Migration-Check..."
+PREV_SHA=$(cat "${REPO_ROOT}/.last-deployed-sha" 2>/dev/null || echo "")
+CUR_SHA=$(git -C "${REPO_ROOT}" rev-parse HEAD)
+
+run_migration=false
+if [[ -z "$PREV_SHA" ]]; then
+  log "Kein .last-deployed-sha gefunden — first-deploy: Migration sicherheitshalber ausführen"
+  run_migration=true
+elif ! git -C "${REPO_ROOT}" diff --quiet "$PREV_SHA"..HEAD -- backend/prisma/migrations/ backend/prisma/schema.prisma; then
+  log "Migration-Changes detected zwischen ${PREV_SHA} und ${CUR_SHA}"
+  run_migration=true
+else
+  log "Keine Migration-Changes seit ${PREV_SHA} — skip migrate deploy"
+fi
+
+if $run_migration; then
+  log "Running prisma migrate deploy..."
+  cd "${APP_DIR}"
+
+  # Infisical-Wrapper für DATABASE_URL (analog start-staging.sh)
+  source /etc/environment
+  if [[ -z "${INFISICAL_CLIENT_ID:-}" || -z "${INFISICAL_CLIENT_SECRET:-}" ]]; then
+    log_err "INFISICAL_CLIENT_ID / INFISICAL_CLIENT_SECRET fehlt — kann Migration nicht ausführen"
+    exit 1
+  fi
+
+  INFISICAL_TOKEN=$(infisical login \
+    --method=universal-auth \
+    --client-id="${INFISICAL_CLIENT_ID}" \
+    --client-secret="${INFISICAL_CLIENT_SECRET}" \
+    --silent --plain 2>/dev/null)
+
+  if [[ -z "$INFISICAL_TOKEN" ]]; then
+    log_err "Infisical login fehlgeschlagen — Migration abgebrochen"
+    exit 1
+  fi
+
+  # DATABASE_URL injecten via infisical run; Aliasing analog start-staging.sh
+  # (Infisical-Secret heißt evtl. NUXT_DATABASE_URL, prisma erwartet DATABASE_URL).
+  infisical run \
+    --projectId="${INFISICAL_PROJECT_ID:-14b11b35-ef59-4b8a-a16b-398f0cc3ad93}" \
+    --env=staging \
+    --token="$INFISICAL_TOKEN" \
+    -- bash -c '
+      set -e
+      export DATABASE_URL="${DATABASE_URL:-${NUXT_DATABASE_URL:-}}"
+      if [[ -z "$DATABASE_URL" ]]; then
+        echo "[deploy:err] DATABASE_URL nicht in Infisical-staging — Migration abgebrochen" >&2
+        exit 1
+      fi
+      "'"${PNPM_BIN}"'" prisma migrate deploy --schema prisma/schema.prisma
+    ' 2>&1 || {
+    log_err "Migration-Deploy fehlgeschlagen — pm2-restart ABGEBROCHEN (Daten-Konsistenz-Schutz)"
+    exit 1
+  }
+
+  log "Migration done"
+fi
+
 # 3. Build backend (Nitro standalone) — Prisma generate ist Teil des build-scripts
 log "Step 3: pnpm --filter rebreak-backend build..."
 cd "${APP_DIR}"
@@ -90,4 +155,8 @@ log "Step 6: Optional services restart..."
 # 7. pm2 save
 "${PM2_BIN}" save 2>/dev/null || true
 
+# 8. Last-deployed-SHA persistieren (für Step 2.5 beim nächsten Deploy)
+echo "${CUR_SHA}" > "${REPO_ROOT}/.last-deployed-sha"
+log "Last-deployed-SHA gespeichert: ${CUR_SHA}"
+
 log "=== Deploy erfolgreich: $(git -C ${REPO_ROOT} rev-parse --short HEAD) ==="