diff --git a/offline-backend-20260512/README.md b/offline-backend-20260512/README.md
new file mode 100644
index 00000000..e77ac35a
--- /dev/null
+++ b/offline-backend-20260512/README.md
@@ -0,0 +1,64 @@
+# DeerFlow 离线后端部署补充
+
+本目录提供一套与 `start_backend_offline.sh` 配套的 wheelhouse 流程，用于在联网机器准备 Python 依赖，再将整个发布目录复制到无网络服务器运行。
+
+## 文件
+
+- `offline-runtime-requirements.txt`：启动时补装的固定版本依赖。
+- `prepare_wheelhouse.sh`：联网机器下载 Linux/Python 3.12 wheel，并验证传递依赖完整性。
+- `start_backend_offline.sh`：从本地 wheelhouse 补装依赖后启动 Docker 后端。
+- `wheelhouse/`：下载脚本生成；应与启动脚本一起复制到离线机。
+
+## 联网机器准备
+
+默认目标是后端镜像使用的 CPython 3.12、Linux x86_64：
+
+```bash
+cd offline-backend-20260512
+bash prepare_wheelhouse.sh
+```
+
+脚本固定下载：
+
+- `croniter==6.2.2`
+- `hindsight-client==0.6.2`
+- `redis==5.2.1`
+- 上述包在 Python 3.12/Linux x86_64 下的 19 个传递依赖；版本也已全部锁定在 `offline-runtime-requirements.txt`
+
+国内镜像示例：
+
+```bash
+PIP_INDEX_URL=https://pypi.tuna.tsinghua.edu.cn/simple bash prepare_wheelhouse.sh
+```
+
+ARM64 镜像需要改目标平台：
+
+```bash
+TARGET_PLATFORM=manylinux2014_aarch64 bash prepare_wheelhouse.sh
+```
+
+下载完成后，`wheelhouse/SHA256SUMS` 可用于离线机校验文件完整性。
+
+## 离线机器启动
+
+确保发布目录还包含 Docker 镜像 tar、`.env`、`config.yaml`、`skill_evolution.json` 和 `backend/`，然后运行。`extensions_config.json` 与 `skills/` 会优先从发布根目录读取，不存在时自动回退到 `backend/`：
+
+```bash
+cd offline-backend-20260512
+bash start_backend_offline.sh
+docker logs -f deerflow-backend
+```
+
+只检查目录、配置项、wheel 和 checksum，不操作容器：
+
+```bash
+PREFLIGHT_ONLY=1 bash start_backend_offline.sh
+```
+
+启动脚本只使用 `/app/wheelhouse`，不会访问 PyPI。它会验证 checksum，并在镜像虚拟环境缺包时一次性安装三个固定版本的运行时包。
+
+## Redis 说明
+
+`redis==5.2.1` 只是 Python 客户端，不包含 Redis 服务端。`config.yaml` 中 `concurrency.redis.enabled: false` 时无需部署 Redis；启用后必须另行准备可访问的 Redis 服务或离线 Redis Docker 镜像。
+
+如果 Redis 运行在另一个容器，`redis://127.0.0.1:6379/0` 指向的是后端容器自身，不能直接使用。应将两个容器加入同一个 Docker network，并把 URL 改成类似 `redis://redis:6379/0`，同时为不同环境设置不同的 `namespace`。
diff --git a/offline-backend-20260512/backend/CLAUDE.md b/offline-backend-20260512/backend/CLAUDE.md
index 1cb9bcd3..839e9615 100644
--- a/offline-backend-20260512/backend/CLAUDE.md
+++ b/offline-backend-20260512/backend/CLAUDE.md
@@ -998,6 +998,7 @@ Both the `view_image` tool and `ViewImageMiddleware` are registered whenever `vi
 ## Documentation
 
 See `docs/` directory for detailed documentation:
+- [../README.md](../README.md) - Offline Docker wheelhouse preparation and startup workflow. The pinned versions in `../offline-runtime-requirements.txt` and `../start_backend_offline.sh` must stay synchronized. The download target defaults to CPython 3.12 on Linux x86_64 and verifies dependency closure using wheelhouse only.
 - [CONFIGURATION.md](docs/CONFIGURATION.md) - Configuration options
 - [ARCHITECTURE.md](docs/ARCHITECTURE.md) - Architecture details
 - [API.md](docs/API.md) - API reference
diff --git a/offline-backend-20260512/backend/README.md b/offline-backend-20260512/backend/README.md
index 40e7e03b..2ffcacd6 100644
--- a/offline-backend-20260512/backend/README.md
+++ b/offline-backend-20260512/backend/README.md
@@ -407,6 +407,7 @@ uv run pytest
 - [Configuration Guide](docs/CONFIGURATION.md)
 - [Architecture Details](docs/ARCHITECTURE.md)
 - [API Reference](docs/API.md)
+- [Offline Docker wheelhouse deployment (ZH)](../README.md)
 - [File Upload](docs/FILE_UPLOAD.md)
 - [Path Examples](docs/PATH_EXAMPLES.md)
 - [Context Summarization](docs/summarization.md)
diff --git a/offline-backend-20260512/offline-runtime-requirements.txt b/offline-backend-20260512/offline-runtime-requirements.txt
new file mode 100644
index 00000000..b493ed02
--- /dev/null
+++ b/offline-backend-20260512/offline-runtime-requirements.txt
@@ -0,0 +1,27 @@
+# Direct runtime packages layered into the prebuilt offline backend image.
+# Keep these three pins synchronized with start_backend_offline.sh.
+croniter==6.2.2
+hindsight-client==0.6.2
+redis==5.2.1
+
+# Fully pinned dependency closure for CPython 3.12 on Linux. Keeping the
+# transitive packages here makes a newly generated wheelhouse reproducible.
+aiohappyeyeballs==2.7.1
+aiohttp==3.14.2
+aiohttp-retry==2.9.1
+aiosignal==1.4.0
+annotated-types==0.7.0
+async-timeout==5.0.1
+attrs==26.1.0
+frozenlist==1.8.0
+idna==3.18
+multidict==6.7.1
+propcache==0.5.2
+pydantic==2.13.4
+pydantic-core==2.46.4
+python-dateutil==2.9.0.post0
+six==1.17.0
+typing-extensions==4.16.0
+typing-inspection==0.4.2
+urllib3==2.7.0
+yarl==1.24.5
diff --git a/offline-backend-20260512/prepare_wheelhouse.sh b/offline-backend-20260512/prepare_wheelhouse.sh
new file mode 100755
index 00000000..81cff94a
--- /dev/null
+++ b/offline-backend-20260512/prepare_wheelhouse.sh
@@ -0,0 +1,99 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+PYTHON_BIN="${PYTHON_BIN:-python3}"
+REQUIREMENTS_FILE="${REQUIREMENTS_FILE:-${SCRIPT_DIR}/offline-runtime-requirements.txt}"
+WHEELHOUSE_DIR="${WHEELHOUSE_DIR:-${SCRIPT_DIR}/wheelhouse}"
+PIP_INDEX_URL="${PIP_INDEX_URL:-https://pypi.org/simple}"
+
+# The supplied backend image is CPython 3.12 on Debian x86_64. These values can
+# be overridden when building an offline bundle for a different image/CPU.
+TARGET_PLATFORM="${TARGET_PLATFORM:-manylinux2014_x86_64}"
+TARGET_PYTHON_VERSION="${TARGET_PYTHON_VERSION:-312}"
+TARGET_IMPLEMENTATION="${TARGET_IMPLEMENTATION:-cp}"
+TARGET_ABI="${TARGET_ABI:-cp312}"
+
+die() {
+  echo "ERROR: $*" >&2
+  exit 1
+}
+
+require_cmd() {
+  command -v "$1" >/dev/null 2>&1 || die "command not found: $1"
+}
+
+require_wheel() {
+  local pattern="$1"
+  compgen -G "${WHEELHOUSE_DIR}/${pattern}" >/dev/null || die "wheel not downloaded: ${pattern}"
+}
+
+require_cmd "${PYTHON_BIN}"
+require_cmd sha256sum
+[ -f "${REQUIREMENTS_FILE}" ] || die "requirements file not found: ${REQUIREMENTS_FILE}"
+"${PYTHON_BIN}" -m pip --version >/dev/null 2>&1 || die "pip is not available for ${PYTHON_BIN}"
+
+mkdir -p "${WHEELHOUSE_DIR}"
+
+download_args=(
+  download
+  --dest "${WHEELHOUSE_DIR}"
+  --only-binary=:all:
+  --platform "${TARGET_PLATFORM}"
+  --python-version "${TARGET_PYTHON_VERSION}"
+  --implementation "${TARGET_IMPLEMENTATION}"
+  --abi "${TARGET_ABI}"
+)
+
+echo "Downloading Linux/Python runtime wheels"
+echo "  requirements: ${REQUIREMENTS_FILE}"
+echo "  destination:  ${WHEELHOUSE_DIR}"
+echo "  platform:     ${TARGET_PLATFORM}"
+echo "  Python/ABI:   ${TARGET_PYTHON_VERSION}/${TARGET_ABI}"
+
+"${PYTHON_BIN}" -m pip "${download_args[@]}" \
+  --index-url "${PIP_INDEX_URL}" \
+  --requirement "${REQUIREMENTS_FILE}"
+
+require_wheel 'croniter-6.2.2-*.whl'
+require_wheel 'hindsight_client-0.6.2-*.whl'
+require_wheel 'redis-5.2.1-*.whl'
+
+# Resolve the same requirements a second time using only wheelhouse. This
+# catches a missing transitive dependency before the bundle reaches offline.
+verify_dir="$(mktemp -d)"
+cleanup() {
+  if [ -n "${verify_dir:-}" ] && [ -d "${verify_dir}" ]; then
+    rm -rf -- "${verify_dir}"
+  fi
+}
+trap cleanup EXIT
+
+verify_args=(
+  download
+  --dest "${verify_dir}"
+  --no-index
+  --find-links "${WHEELHOUSE_DIR}"
+  --only-binary=:all:
+  --platform "${TARGET_PLATFORM}"
+  --python-version "${TARGET_PYTHON_VERSION}"
+  --implementation "${TARGET_IMPLEMENTATION}"
+  --abi "${TARGET_ABI}"
+  --requirement "${REQUIREMENTS_FILE}"
+)
+"${PYTHON_BIN}" -m pip "${verify_args[@]}" >/dev/null
+
+shopt -s nullglob
+wheels=("${WHEELHOUSE_DIR}"/*.whl)
+[ "${#wheels[@]}" -gt 0 ] || die "wheelhouse is empty: ${WHEELHOUSE_DIR}"
+(
+  cd "${WHEELHOUSE_DIR}"
+  sha256sum -- *.whl | LC_ALL=C sort > SHA256SUMS
+)
+
+echo
+echo "Wheelhouse is complete for the pinned runtime requirements."
+echo "  wheel count: ${#wheels[@]}"
+echo "  checksums:   ${WHEELHOUSE_DIR}/SHA256SUMS"
+echo "Copy the wheelhouse directory with the deployment bundle."
diff --git a/offline-backend-20260512/start_backend_offline.sh b/offline-backend-20260512/start_backend_offline.sh
new file mode 100755
index 00000000..1952f766
--- /dev/null
+++ b/offline-backend-20260512/start_backend_offline.sh
@@ -0,0 +1,178 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+IMAGE_TAG="${IMAGE_TAG:-deerflow-backend-offline:20260505}"
+CONTAINER_NAME="${CONTAINER_NAME:-deerflow-backend}"
+HOST_PORT="${HOST_PORT:-8001}"
+IMAGE_TAR="${IMAGE_TAR:-${SCRIPT_DIR}/deerflow-backend-offline-image-20260505.tar}"
+CONTAINER_TZ="${CONTAINER_TZ:-${TZ:-Asia/Shanghai}}"
+
+default_extensions_config="${SCRIPT_DIR}/extensions_config.json"
+if [ ! -f "${default_extensions_config}" ]; then
+  default_extensions_config="${SCRIPT_DIR}/backend/extensions_config.json"
+fi
+EXTENSIONS_CONFIG_FILE="${EXTENSIONS_CONFIG_FILE:-${default_extensions_config}}"
+
+default_skills_dir="${SCRIPT_DIR}/skills"
+if [ ! -d "${default_skills_dir}" ]; then
+  default_skills_dir="${SCRIPT_DIR}/backend/skills"
+fi
+SKILLS_DIR="${SKILLS_DIR:-${default_skills_dir}}"
+
+die() {
+  echo "ERROR: $*" >&2
+  exit 1
+}
+
+require_cmd() {
+  command -v "$1" >/dev/null 2>&1 || die "command not found: $1"
+}
+
+require_file() {
+  [ -f "$1" ] || die "required file not found: $1"
+}
+
+require_dir() {
+  [ -d "$1" ] || die "required directory not found: $1"
+}
+
+require_env_key() {
+  local key="$1"
+  grep -Eq "^[[:space:]]*${key}=" "${SCRIPT_DIR}/.env" || die "required .env key not found: ${key}"
+}
+
+require_wheel() {
+  local pattern="$1"
+  compgen -G "${SCRIPT_DIR}/wheelhouse/${pattern}" >/dev/null || die "required wheel not found: wheelhouse/${pattern}"
+}
+
+require_cmd docker
+
+if [ ! -f "${SCRIPT_DIR}/.env" ]; then
+  if [ -f "${SCRIPT_DIR}/.env.example" ]; then
+    cp "${SCRIPT_DIR}/.env.example" "${SCRIPT_DIR}/.env"
+    echo "Generated .env from .env.example. Please edit .env and run this script again."
+    exit 1
+  fi
+  die "missing .env"
+fi
+
+if [ ! -f "${SCRIPT_DIR}/config.yaml" ]; then
+  if [ -f "${SCRIPT_DIR}/config.yaml.example" ]; then
+    cp "${SCRIPT_DIR}/config.yaml.example" "${SCRIPT_DIR}/config.yaml"
+    echo "Generated config.yaml from config.yaml.example. Please edit model/API settings and run this script again."
+    exit 1
+  fi
+  die "missing config.yaml"
+fi
+
+require_env_key AUTH_JWT_SECRET
+require_env_key SCHEDULED_TASKS_ENABLED
+require_env_key ELEMENT_ENABLED
+require_file "${SCRIPT_DIR}/config.yaml"
+require_file "${EXTENSIONS_CONFIG_FILE}"
+require_file "${SCRIPT_DIR}/skill_evolution.json"
+require_file "${SCRIPT_DIR}/backend/pyproject.toml"
+require_file "${SCRIPT_DIR}/backend/app/gateway/app.py"
+require_file "${SCRIPT_DIR}/backend/packages/harness/deerflow/runtime/scheduler/element.py"
+require_file "${SCRIPT_DIR}/backend/langgraph.json"
+require_dir "${SKILLS_DIR}"
+require_dir "${SCRIPT_DIR}/wheelhouse"
+require_dir "${SCRIPT_DIR}/backend/knowledge/knowledge_base"
+require_wheel 'croniter-6.2.2-*.whl'
+require_wheel 'hindsight_client-0.6.2-*.whl'
+require_wheel 'redis-5.2.1-*.whl'
+
+if [ -f "${SCRIPT_DIR}/wheelhouse/SHA256SUMS" ]; then
+  require_cmd sha256sum
+  echo "Verifying wheelhouse checksums"
+  (cd "${SCRIPT_DIR}/wheelhouse" && sha256sum -c SHA256SUMS)
+fi
+
+mkdir -p "${SCRIPT_DIR}/data"
+
+if [ "${PREFLIGHT_ONLY:-0}" = "1" ]; then
+  echo "Offline backend preflight passed. No container was changed."
+  exit 0
+fi
+
+if ! docker image inspect "${IMAGE_TAG}" >/dev/null 2>&1; then
+  require_file "${IMAGE_TAR}"
+  echo "Loading Docker image from ${IMAGE_TAR}"
+  docker load -i "${IMAGE_TAR}"
+fi
+
+if docker ps -a --format '{{.Names}}' | awk -v name="${CONTAINER_NAME}" '$0 == name { found=1 } END { exit(found ? 0 : 1) }'; then
+  echo "Removing existing container ${CONTAINER_NAME}"
+  docker rm -f "${CONTAINER_NAME}" >/dev/null
+fi
+
+mount_args=(
+  -v "${SCRIPT_DIR}/backend/app:/app/backend/app"
+  -v "${SCRIPT_DIR}/backend/packages:/app/backend/packages"
+  -v "${SCRIPT_DIR}/backend/scripts:/app/backend/scripts"
+  -v "${SCRIPT_DIR}/backend/pyproject.toml:/app/backend/pyproject.toml:ro"
+  -v "${SCRIPT_DIR}/backend/langgraph.json:/app/backend/langgraph.json:ro"
+  -v "${SCRIPT_DIR}/config.yaml:/app/config.yaml:ro"
+  -v "${EXTENSIONS_CONFIG_FILE}:/app/extensions_config.json:ro"
+  -v "${SCRIPT_DIR}/skill_evolution.json:/app/skill_evolution.json:ro"
+  -v "${SKILLS_DIR}:/app/skills:ro"
+  -v "${SCRIPT_DIR}/wheelhouse:/app/wheelhouse:ro"
+  -v "${SCRIPT_DIR}/backend/knowledge/knowledge_base:/mnt/knowledge_base:ro"
+  -v "${SCRIPT_DIR}/data:/app/backend/.deer-flow"
+)
+
+# uv.lock is not needed by uv run --no-sync, but mount it when the release
+# bundle contains one so the container exactly reflects the online build.
+if [ -f "${SCRIPT_DIR}/backend/uv.lock" ]; then
+  mount_args+=(
+    -v "${SCRIPT_DIR}/backend/uv.lock:/app/backend/uv.lock:ro"
+  )
+fi
+
+echo "Starting backend container ${CONTAINER_NAME}"
+docker run -d \
+  --name "${CONTAINER_NAME}" \
+  --restart unless-stopped \
+  -p "${HOST_PORT}:8001" \
+  --env-file "${SCRIPT_DIR}/.env" \
+  -e TZ="${CONTAINER_TZ}" \
+  -e DEER_FLOW_PROJECT_ROOT=/app \
+  -e DEER_FLOW_HOME=/app/backend/.deer-flow \
+  -e DEER_FLOW_CONFIG_PATH=/app/config.yaml \
+  -e DEER_FLOW_EXTENSIONS_CONFIG_PATH=/app/extensions_config.json \
+  -e DEER_FLOW_SKILL_EVOLUTION_CONFIG_PATH=/app/skill_evolution.json \
+  -e DEER_FLOW_SKILLS_PATH=/app/skills \
+  -e UV_LINK_MODE=copy \
+  "${mount_args[@]}" \
+  "${IMAGE_TAG}" \
+  sh -c 'set -eu
+cd backend
+if [ -n "${TZ:-}" ] && [ -f "/usr/share/zoneinfo/${TZ}" ]; then
+  ln -sf "/usr/share/zoneinfo/${TZ}" /etc/localtime 2>/dev/null || true
+  echo "${TZ}" > /etc/timezone 2>/dev/null || true
+fi
+
+if [ "${OFFLINE_RUNTIME_INSTALL_DEPS:-1}" != "0" ]; then
+  if ! uv run --no-sync python -c "import croniter, hindsight_client, redis" >/dev/null 2>&1; then
+    echo "Installing offline runtime packages from /app/wheelhouse"
+    PYTHON_BIN="$(uv run --no-sync python -c "import sys; print(sys.executable)")"
+    # Word splitting is intentional so .env may override this package list.
+    uv pip install \
+      --python "${PYTHON_BIN}" \
+      --no-index \
+      --find-links /app/wheelhouse \
+      ${OFFLINE_RUNTIME_PIP_PACKAGES:-croniter==6.2.2 hindsight-client==0.6.2 redis==5.2.1}
+  fi
+  uv run --no-sync python -c "import importlib.metadata as m; names=(\"croniter\", \"hindsight-client\", \"redis\"); print(\"Offline runtime packages:\", \", \".join(f\"{name}={m.version(name)}\" for name in names))"
+fi
+
+PYTHONPATH=. uv run --no-sync python -m uvicorn app.gateway.app:app --host 0.0.0.0 --port 8001 --workers "${GATEWAY_WORKERS:-2}"'
+
+echo
+echo "Backend started."
+echo "  URL:       http://<server-ip>:${HOST_PORT}"
+echo "  Logs:      docker logs -f ${CONTAINER_NAME}"
+echo "  Stop:      docker rm -f ${CONTAINER_NAME}"