diff --git a/add-external-repos.sh b/add-external-repos.sh
new file mode 100644
index 0000000..19767db
--- /dev/null
+++ b/add-external-repos.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+# Update or clone specified OpenWRT package repositories
+
+set -e  # Exit immediately if any command fails
+umask 022  # Set default file permissions (files=644, dirs=755)
+
+# Define repositories in the format: "git_url branch local_dir"
+REPOS=(
+  "https://github.com/muink/luci-app-netspeedtest.git master package/luci-app-netspeedtest"
+  "https://github.com/EasyTier/luci-app-easytier.git main package/luci-app-easytier"
+)
+
+for REPO_INFO in "${REPOS[@]}"; do
+  set -- $REPO_INFO
+  REPO_URL=$1
+  REPO_BRANCH=$2
+  LOCAL_DIR=$3
+
+  echo "----------------------------------------"
+  echo "Processing $LOCAL_DIR ($REPO_BRANCH)"
+  echo "----------------------------------------"
+
+  if [ -d "$LOCAL_DIR/.git" ]; then
+    echo "Repository exists, updating..."
+    pushd "$LOCAL_DIR" > /dev/null
+    git fetch origin "$REPO_BRANCH"
+    git checkout "$REPO_BRANCH"
+    git pull --ff-only origin "$REPO_BRANCH"
+    popd > /dev/null
+  else
+    echo "Repository not found, cloning..."
+    git clone --depth 1 --branch "$REPO_BRANCH" --single-branch "$REPO_URL" "$LOCAL_DIR"
+  fi
+
+  echo "Done: $LOCAL_DIR"
+  echo
+done
+
+echo "✅ All repositories updated successfully."
+
diff --git a/add-openwrt-packages.sh b/add-openwrt-packages.sh
new file mode 100644
index 0000000..8a680b4
--- /dev/null
+++ b/add-openwrt-packages.sh
@@ -0,0 +1,86 @@
+#!/bin/bash
+# Add specified OpenWRT packages (from a text file) to .config without removing existing ones
+# Author: Zhe Yuan
+# Usage:
+#   ./add-openwrt-packages.sh packages.txt
+# Description:
+#   - Reads package names from a text file (supports both newline or space separation)
+#   - Adds missing CONFIG_PACKAGE_xxx=y entries to .config
+#   - Keeps existing settings intact
+#   - Reports missing packages
+#   - Runs make defconfig at the end to sync dependencies
+
+set -e
+umask 022
+
+# Check argument
+if [ "$#" -ne 1 ]; then
+  echo "❌ Usage: $0 <package_list.txt>"
+  exit 1
+fi
+
+PKG_FILE="$1"
+
+# Verify file exists
+if [ ! -f "$PKG_FILE" ]; then
+  echo "❌ Error: File not found: $PKG_FILE"
+  exit 1
+fi
+
+# Verify we are in OpenWRT source root
+if [ ! -d "package" ] || [ ! -f "Makefile" ]; then
+  echo "❌ Error: Please run this script in the OpenWRT source root directory."
+  exit 1
+fi
+
+# Ensure .config exists
+if [ ! -f ".config" ]; then
+  echo "⚙️  Generating initial .config..."
+  make defconfig
+fi
+
+echo "📦 Reading packages from $PKG_FILE ..."
+
+# Read all non-empty, non-comment lines, split by any whitespace
+PACKAGES=$(grep -v '^[[:space:]]*$' "$PKG_FILE" | grep -v '^#' | tr '\n' ' ')
+
+ADDED=()
+MISSING=()
+
+for pkg in $PACKAGES; do
+  CONFIG_NAME="CONFIG_PACKAGE_${pkg}"
+
+  # Skip if already enabled
+  if grep -q "^${CONFIG_NAME}=y" .config; then
+    echo "✅ Already enabled: $pkg"
+    continue
+  fi
+
+  # Check if package exists in package/ or feeds/
+  if ! find package feeds -type d -path "*/${pkg}" -mindepth 1 -maxdepth 3 2>/dev/null | grep -q .; then
+    echo "⚠️  Package not found: $pkg"
+    MISSING+=("$pkg")
+    continue
+  fi
+
+  # Append package config
+  echo "${CONFIG_NAME}=y" >> .config
+  ADDED+=("$pkg")
+  echo "➕ Added: $pkg"
+done
+
+# Run defconfig to sync dependencies
+echo
+echo "⚙️  Running make defconfig..."
+make defconfig >/dev/null
+
+echo
+echo "✅ Done!"
+echo "📋 Packages newly added: ${#ADDED[@]}"
+[ ${#ADDED[@]} -gt 0 ] && echo "  → ${ADDED[*]}"
+if [ ${#MISSING[@]} -gt 0 ]; then
+  echo "⚠️  Packages not found (check feeds or spelling):"
+  for m in "${MISSING[@]}"; do
+    echo "   - $m"
+  done
+fi
diff --git a/apply-dahdi-patches.sh b/apply-dahdi-patches.sh
new file mode 100644
index 0000000..b7775dc
--- /dev/null
+++ b/apply-dahdi-patches.sh
@@ -0,0 +1,148 @@
+#!/bin/bash
+# Apply DAHDI driver patch for OpenWRT 24.10.4
+# Fixes MAX macro naming issues in dahdi-linux modules
+# Author: ChatGPT (for Zhe Yuan)
+
+set -e
+umask 022
+
+PATCH_DIR="package/feeds/telephony/dahdi-linux/patches"
+PATCH_FILE="$PATCH_DIR/300-fix-dahdi-max-attempts.patch"
+
+echo "========================================"
+echo " DAHDI Linux Patch Applier for OpenWRT"
+echo "========================================"
+
+# --- Check if inside OpenWRT source directory ---
+if [ ! -f "feeds.conf.default" ] || [ ! -d "package" ]; then
+  echo "[ERROR] This script must be run inside the OpenWRT root directory."
+  echo "Please 'cd' to your OpenWRT source root and run again."
+  exit 1
+fi
+
+# --- Check if dahdi patch directory exists ---
+if [ ! -d "$PATCH_DIR" ]; then
+  echo "[ERROR] Patch directory not found:"
+  echo "  $PATCH_DIR"
+  echo
+  echo "Please make sure telephony feed is installed:"
+  echo "  ./scripts/feeds update telephony"
+  echo "  ./scripts/feeds install -a"
+  exit 1
+fi
+
+# --- Create patch file ---
+echo "[INFO] Writing DAHDI patch to: $PATCH_FILE"
+cat > "$PATCH_FILE" <<'EOF'
+--- a/drivers/dahdi/wctdm24xxp/base.c
++++ b/drivers/dahdi/wctdm24xxp/base.c
+@@ -1516,16 +1516,16 @@ static int wait_access(struct wctdm *wc, struct wctdm_module *const mod)
+ {
+ 	unsigned char data = 0;
+ 	int count = 0;
+ 
+-	#define MAX 10 /* attempts */
++	#define MAX_ATTEMPTS 10 /* attempts */
+ 
+ 	/* Wait for indirect access */
+-	while (count++ < MAX) {
++	while (count++ < MAX_ATTEMPTS) {
+ 		data = wctdm_getreg(wc, mod, I_STATUS);
+ 		if (!data)
+ 			return 0;
+ 	}
+ 
+-	if (count > (MAX-1)) {
++	if (count > (MAX_ATTEMPTS-1)) {
+ 		dev_notice(&wc->vb.pdev->dev,
+ 			   " ##### Loop error (%02x) #####\n", data);
+ 	}
+
+--- a/drivers/dahdi/opvxa1200/base.c
++++ b/drivers/dahdi/opvxa1200/base.c
+@@ -868,12 +868,12 @@ static int wait_access(struct wctdm *wc, int card)
+     long origjiffies;
+     int count = 0;
+ 
+-    #define MAX 6000 /* attempts */
++    #define MAX_ATTEMPTS 6000 /* attempts */
+ 
+ 
+     origjiffies = jiffies;
+     /* Wait for indirect access */
+-    while (count++ < MAX)
++    while (count++ < MAX_ATTEMPTS)
+ 	 {
+ 		data = __wctdm_getreg(wc, card, I_STATUS);
+ 
+@@ -882,7 +882,7 @@ static int wait_access(struct wctdm *wc, int card)
+ 
+ 	 }
+ 
+-    if(count > (MAX-1)) printk(KERN_NOTICE " ##### Loop error (%02x) #####\n", data);
++    if(count > (MAX_ATTEMPTS-1)) printk(KERN_NOTICE " ##### Loop error (%02x) #####\n", data);
+ 
+ 	return 0;
+ }
+
+--- a/drivers/dahdi/wcaxx-base.c
++++ b/drivers/dahdi/wcaxx-base.c
+@@ -1066,16 +1066,16 @@ static int wait_access(struct wcaxx *wc, struct wcaxx_module *const mod)
+ 	unsigned char data = 0;
+ 	int count = 0;
+ 
+-	#define MAX 10 /* attempts */
++	#define MAX_ATTEMPTS 10 /* attempts */
+ 
+ 	/* Wait for indirect access */
+-	while (count++ < MAX) {
++	while (count++ < MAX_ATTEMPTS) {
+ 		data = wcaxx_getreg(wc, mod, I_STATUS);
+ 		if (!data)
+ 			return 0;
+ 	}
+ 
+-	if (count > (MAX-1)) {
++	if (count > (MAX_ATTEMPTS-1)) {
+ 		dev_notice(&wc->xb.pdev->dev,
+ 			   " ##### Loop error (%02x) #####\n", data);
+ 	}
+
+--- a/drivers/dahdi/wctdm.c
++++ b/drivers/dahdi/wctdm.c
+@@ -623,11 +623,11 @@ static int wait_access(struct wctdm *wc, int card)
+     unsigned char data = 0;
+     int count = 0;
+ 
+-    #define MAX 6000 /* attempts */
++    #define MAX_ATTEMPTS 6000 /* attempts */
+ 
+ 
+     /* Wait for indirect access */
+-    while (count++ < MAX)
++    while (count++ < MAX_ATTEMPTS)
+ 	 {
+ 		data = __wctdm_getreg(wc, card, I_STATUS);
+ 
+@@ -636,7 +636,7 @@ static int wait_access(struct wctdm *wc, int card)
+ 
+ 	 }
+ 
+-    if(count > (MAX-1)) printk(KERN_NOTICE " ##### Loop error (%02x) #####\n", data);
++    if(count > (MAX_ATTEMPTS-1)) printk(KERN_NOTICE " ##### Loop error (%02x) #####\n", data);
+ 
+ 	return 0;
+ }
+EOF
+
+echo "[SUCCESS] Patch written successfully!"
+echo
+echo "========================================"
+echo "✅ DAHDI patch applied successfully!"
+echo "   File: $PATCH_FILE"
+echo "========================================"
+echo
+echo "👉 Next step:"
+echo "   make package/feeds/telephony/dahdi-linux/{clean,prepare} V=s"
+echo "   make package/feeds/telephony/dahdi-linux/compile V=s"
+echo
diff --git a/download-config.sh b/download-config.sh
new file mode 100644
index 0000000..c68378b
--- /dev/null
+++ b/download-config.sh
@@ -0,0 +1,96 @@
+#!/bin/bash
+# Download OpenWRT config.buildinfo, generate .config and run defconfig
+# Author: Zhe Yuan
+
+set -e
+umask 022
+
+# --- Check if inside OpenWRT source directory ---
+if [ ! -f "feeds.conf.default" ] || [ ! -d "package" ]; then
+    echo "[ERROR] Must run inside OpenWRT root directory."
+    exit 1
+fi
+
+# --- Detect Git version ---
+VERSION=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
+VERSION="${VERSION#v}"
+IS_LATEST=false
+
+if [ -z "$VERSION" ]; then
+    BRANCH=$(git rev-parse --abbrev-ref HEAD)
+    if [[ "$BRANCH" =~ openwrt-([0-9]+\.[0-9]+) ]]; then
+        PARTIAL_VERSION="${BASH_REMATCH[1]}"
+        # Find latest patch tag
+        LATEST_TAG=$(git tag -l "v${PARTIAL_VERSION}.*" | sort -V | tail -n1)
+        if [ -z "$LATEST_TAG" ]; then
+            echo "[ERROR] Cannot find latest tag for $PARTIAL_VERSION.*"
+            exit 1
+        fi
+        VERSION="${LATEST_TAG#v}"
+        IS_LATEST=true
+    elif [[ "$BRANCH" == *SNAPSHOT* ]]; then
+        VERSION="SNAPSHOT"
+    else
+        read -rp "Cannot detect version, input manually (e.g., 24.10.4 or SNAPSHOT): " VERSION
+    fi
+fi
+
+echo "[INFO] OpenWRT version: $VERSION"
+
+# --- Devices list ---
+# Format: Name Target FirmwareDevice
+DEVICES=(
+"Linksys_MX8500 qualcommax/ipq807x linksys_mx8500"
+"Cudy_TR3000_128MB mediatek/filogic cudy_tr3000-v1"
+"Cudy_TR3000_256MB mediatek/filogic cudy_tr3000-256mb-v1"
+)
+
+echo "Available devices:"
+for i in "${!DEVICES[@]}"; do
+    NAME=$(echo "${DEVICES[$i]}" | awk '{print $1}')
+    echo "  $i) $NAME"
+done
+
+read -rp "Select device number: " DEV_INDEX
+if [[ -z "${DEVICES[$DEV_INDEX]}" ]]; then
+    echo "[ERROR] Invalid selection."
+    exit 1
+fi
+
+# --- Extract device info ---
+read -r DEV_NAME DEV_TARGET DEV_FW <<<"${DEVICES[$DEV_INDEX]}"
+echo "[INFO] Selected device: $DEV_NAME"
+
+# --- Construct URLs ---
+if [[ "$VERSION" == "SNAPSHOT" ]]; then
+    CONFIG_URL="https://downloads.openwrt.org/snapshots/targets/$DEV_TARGET/config.buildinfo"
+    FIRMWARE_URL="https://downloads.openwrt.org/snapshots/targets/$DEV_TARGET/openwrt-SNAPSHOT-$DEV_TARGET-$DEV_FW-squashfs-sysupgrade.bin"
+else
+    CONFIG_URL="https://downloads.openwrt.org/releases/$VERSION/targets/$DEV_TARGET/config.buildinfo"
+    FIRMWARE_URL="https://downloads.openwrt.org/releases/$VERSION/targets/$DEV_TARGET/openwrt-$VERSION-$DEV_TARGET-$DEV_FW-squashfs-sysupgrade.bin"
+fi
+
+echo "[INFO] Config URL: $CONFIG_URL"
+echo "[INFO] Firmware URL: $FIRMWARE_URL"
+
+# --- Download config.buildinfo ---
+echo "[INFO] Downloading config.buildinfo..."
+wget -q --show-progress -O ".config" "$CONFIG_URL"
+echo "[INFO] Saved as .config"
+
+# --- Run make defconfig ---
+echo "[INFO] Running make defconfig..."
+make defconfig >/dev/null
+echo "[INFO] defconfig done."
+
+# --- Check firmware existence ---
+if curl --head --silent --fail "$FIRMWARE_URL" >/dev/null; then
+    echo "[INFO] Firmware exists: $FIRMWARE_URL"
+else
+    echo "[WARN] Firmware not found or URL invalid."
+fi
+
+# --- Print Firmware Selector URL ---
+TARGET_ESC=$(echo $DEV_TARGET | sed 's|/|%2F|g')
+FS_URL="https://firmware-selector.openwrt.org/?version=$VERSION&target=$TARGET_ESC&id=$DEV_FW"
+echo "[INFO] Check Installed Packages at: $FS_URL"
diff --git a/prepare-openwrt-env.sh b/prepare-openwrt-env.sh
new file mode 100644
index 0000000..bf90d8a
--- /dev/null
+++ b/prepare-openwrt-env.sh
@@ -0,0 +1,112 @@
+#!/bin/bash
+# Automatically prepare OpenWRT build dependencies for Debian/Ubuntu
+# Supports both x86_64 and arm64
+# Detects Ubuntu 22.04, 24.04, Debian 12/13 and newer
+# Author: Zhe Yuan
+
+set -e
+umask 022
+
+echo "========================================"
+echo " OpenWRT Build Environment Preparation"
+echo "========================================"
+
+# --- Detect architecture ---
+ARCH=$(uname -m)
+echo "[INFO] Detected architecture: $ARCH"
+
+# --- Detect OS version ---
+if [ -f /etc/os-release ]; then
+  . /etc/os-release
+  DISTRO="$ID"
+  VERSION_ID="${VERSION_ID:-unknown}"
+else
+  echo "[ERROR] Cannot detect system version (no /etc/os-release)"
+  exit 1
+fi
+
+echo "[INFO] Detected distribution: $DISTRO $VERSION_ID"
+
+# --- Determine if Python 3.12+ is installed (no distutils) ---
+PY_VER=$(python3 -V 2>/dev/null | awk '{print $2}' | cut -d. -f1,2)
+HAS_DISTUTILS=$(apt-cache search python3-distutils 2>/dev/null | grep -c distutils || true)
+
+# --- Base packages (common to all) ---
+COMMON_PACKAGES="build-essential clang flex bison g++ gawk \
+gettext git libssl-dev rsync swig unzip zlib1g-dev file wget"
+
+# --- Determine specific package set ---
+if [[ "$ARCH" == "x86_64" || "$ARCH" == "amd64" ]]; then
+  echo "[INFO] Preparing environment for x86_64."
+
+  if [[ "$VERSION_ID" == "24.04" || ( "$DISTRO" == "debian" && "${VERSION_ID%%.*}" -ge 13 ) ]]; then
+    echo "[INFO] Detected new environment (Python 3.12+, no python3-distutils)."
+    EXTRA_PACKAGES="gcc-multilib g++-multilib libncurses5-dev python3-setuptools"
+  else
+    echo "[INFO] Detected older Ubuntu/Debian (with python3-distutils)."
+    EXTRA_PACKAGES="gcc-multilib g++-multilib libncurses-dev python3-distutils python3-setuptools"
+  fi
+
+  INSTALL_PACKAGES="$COMMON_PACKAGES $EXTRA_PACKAGES"
+
+elif [[ "$ARCH" == "aarch64" || "$ARCH" == "arm64" ]]; then
+  echo "[INFO] Preparing environment for ARM64."
+
+  # Note: arm64 has no native multilib; install cross multilib packages
+  MULTILIB_PACKAGES="
+    gcc-multilib-i686-linux-gnu gcc-multilib-s390x-linux-gnu \
+    gcc-multilib-x86-64-linux-gnu gcc-multilib-x86-64-linux-gnux32 \
+    g++-multilib-i686-linux-gnu g++-multilib-s390x-linux-gnu \
+    g++-multilib-x86-64-linux-gnu g++-multilib-x86-64-linux-gnux32 \
+    libc6-dev-i386-amd64-cross libc6-dev-i386-cross libc6-dev-i386-x32-cross"
+
+  if [[ "$VERSION_ID" == "24.04" || ( "$DISTRO" == "debian" && "${VERSION_ID%%.*}" -ge 13 ) ]]; then
+    EXTRA_PACKAGES="libncurses5-dev python3-setuptools"
+  else
+    EXTRA_PACKAGES="libncurses-dev python3-distutils python3-setuptools"
+  fi
+
+  INSTALL_PACKAGES="$COMMON_PACKAGES $EXTRA_PACKAGES $MULTILIB_PACKAGES golang"
+
+else
+  echo "[WARN] Unknown architecture: $ARCH"
+  echo "[WARN] Attempting to use x86_64 package list."
+  INSTALL_PACKAGES="$COMMON_PACKAGES gcc-multilib g++-multilib libncurses-dev python3-setuptools"
+fi
+
+# --- Display package list ---
+echo
+echo "========================================"
+echo "📦 Packages to install:"
+echo "$INSTALL_PACKAGES"
+echo "========================================"
+echo
+
+echo "[INFO] Updating APT repositories..."
+sudo apt update -y
+
+echo "[INFO] Installing packages..."
+sudo apt install -y $INSTALL_PACKAGES
+
+# --- Post installation notice ---
+echo
+echo "========================================"
+echo "✅ OpenWRT build environment setup complete!"
+echo "========================================"
+echo
+
+if [[ "$ARCH" == "x86_64" || "$ARCH" == "amd64" ]]; then
+  echo "👉 [NOTE] Go language is optional on x86_64."
+  echo "   If you plan to compile packages requiring Go (e.g. firewall4, netifd), install it manually:"
+  echo "     sudo apt install golang -y"
+else
+  echo "👉 [INFO] Go language installed for ARM64 cross compilation."
+fi
+
+echo
+echo "⚙️  After running 'make menuconfig', set Go toolchain path if required:"
+echo "   Example: /usr/lib/go-1.18"
+echo
+echo "👉 Next step:"
+echo "   ./prepare-openwrt.sh   # to clone and set up OpenWRT source"
+echo
diff --git a/prepare-openwrt.sh b/prepare-openwrt.sh
new file mode 100644
index 0000000..2cbdf83
--- /dev/null
+++ b/prepare-openwrt.sh
@@ -0,0 +1,161 @@
+#!/bin/bash
+# Automatically prepare OpenWRT build environment.
+# - Clone or update repository
+# - Support selecting release/beta/snapshot versions
+# - Adjust directory layout automatically if run from openwrt-build-helper
+# - Update and install feeds
+# - Prepare .config for build
+
+set -e
+umask 022
+
+REPO_URL="https://github.com/openwrt/openwrt.git"
+DEFAULT_DIR="openwrt"
+
+echo "========================================"
+echo " OpenWRT Build Environment Setup Script"
+echo "========================================"
+
+# --- Function: detect and normalize directory structure ---
+normalize_structure() {
+  local current_dir=$(basename "$(pwd)")
+
+  if [ "$current_dir" == "openwrt-build-helper" ]; then
+    echo "[INFO] Detected helper directory structure."
+
+    mkdir -p helper
+    # Move everything except helper into helper/
+    for f in * .*; do
+      [[ "$f" == "." || "$f" == ".." || "$f" == "helper" ]] && continue
+      mv "$f" helper/ 2>/dev/null || true
+    done
+
+    cd ..
+    mv openwrt-build-helper openwrt
+    cd openwrt
+    echo "[INFO] Directory renamed to 'openwrt', helper files moved to 'openwrt/helper/'."
+
+  elif [ "$current_dir" == "openwrt" ]; then
+    echo "[INFO] Running directly inside openwrt build directory."
+  else
+    echo "[INFO] Not inside openwrt folder, ensuring 'openwrt' subdirectory exists."
+    mkdir -p openwrt
+    cd openwrt
+  fi
+}
+
+# --- Function: choose version ---
+choose_version() {
+  echo
+  echo "Select OpenWRT version type:"
+  echo "  1) Stable release (e.g., 24.10.4)"
+  echo "  2) Beta (e.g., 24.10-SNAPSHOT or openwrt-24.10)"
+  echo "  3) Latest snapshot (master branch)"
+  echo -n "Enter choice [1-3, default=1]: "
+  read -r choice
+
+  case "$choice" in
+    2)
+      echo -n "Enter beta version (e.g. 24.10 or openwrt-24.10): "
+      read -r VERSION
+      SELECTED_TYPE="beta"
+      ;;
+    3)
+      SELECTED_TYPE="snapshot"
+      VERSION="master"
+      ;;
+    *)
+      echo -n "Enter stable version number (e.g. 24.10.4, default: latest): "
+      read -r VERSION
+      SELECTED_TYPE="stable"
+      ;;
+  esac
+}
+
+# --- Start ---
+normalize_structure
+choose_version
+
+REPO_DIR="$DEFAULT_DIR"
+
+# If already inside openwrt repo, use current path
+if [ -d ".git" ] && [ -f "feeds.conf.default" ]; then
+  REPO_DIR="."
+fi
+
+# --- Clone or update repository ---
+if [ "$REPO_DIR" == "." ]; then
+  echo "[INFO] Existing OpenWRT repository detected. Updating..."
+  git fetch --tags origin
+else
+  if [ -d "$REPO_DIR/.git" ]; then
+    echo "[INFO] Repository exists, updating..."
+    pushd "$REPO_DIR" >/dev/null
+    git fetch --tags origin
+    git pull --ff-only
+    popd >/dev/null
+  else
+    echo "[INFO] Cloning repository..."
+    git clone "$REPO_URL" "$REPO_DIR"
+  fi
+fi
+
+pushd "$REPO_DIR" >/dev/null
+
+# --- Version selection logic ---
+if [ "$SELECTED_TYPE" == "snapshot" ]; then
+  echo "[INFO] Checking out latest master (snapshot)..."
+  git checkout master
+  git pull origin master
+elif [ "$SELECTED_TYPE" == "beta" ]; then
+  # Try both openwrt-<ver> and v<ver>-SNAPSHOT
+  if git rev-parse --verify "openwrt-${VERSION}" >/dev/null 2>&1; then
+    git checkout "openwrt-${VERSION}"
+  elif git rev-parse --verify "v${VERSION}-SNAPSHOT" >/dev/null 2>&1; then
+    git checkout "v${VERSION}-SNAPSHOT"
+  else
+    echo "[ERROR] Beta branch or tag not found for version $VERSION."
+    exit 1
+  fi
+else
+  # Stable version
+  if [ -z "$VERSION" ]; then
+    LATEST_TAG=$(git tag -l "v*" | sort -V | tail -n 1)
+    echo "[INFO] No version specified, using latest stable tag: $LATEST_TAG"
+    VERSION="$LATEST_TAG"
+  else
+    VERSION="v${VERSION}"
+  fi
+
+  if git rev-parse --verify "$VERSION" >/dev/null 2>&1; then
+    git checkout "$VERSION"
+  else
+    echo "[ERROR] Version tag $VERSION not found."
+    exit 1
+  fi
+fi
+
+# --- Update feeds ---
+echo "[INFO] Updating and installing all feeds..."
+./scripts/feeds update -a
+./scripts/feeds install -a
+
+# --- Run defconfig ---
+echo "[INFO] Running make defconfig..."
+make defconfig
+
+CURRENT_VERSION=$(git describe --tags 2>/dev/null || git rev-parse --abbrev-ref HEAD)
+
+popd >/dev/null
+
+echo
+echo "========================================"
+echo "✅ OpenWRT source is ready."
+echo "   Version: $CURRENT_VERSION"
+echo "========================================"
+echo
+echo "👉 Next steps:"
+echo "   cd openwrt"
+echo "   make menuconfig"
+echo "   make -j\$(nproc) download world"
+echo
diff --git a/update-go-path.sh b/update-go-path.sh
new file mode 100644
index 0000000..2cd1b5f
--- /dev/null
+++ b/update-go-path.sh
@@ -0,0 +1,74 @@
+#!/bin/bash
+# Automatically detect Go installation and update .config for OpenWRT
+# Author: Zhe Yuan
+
+set -e
+umask 022
+
+CONFIG_FILE=".config"
+
+echo "========================================"
+echo " Go Path Auto Updater for OpenWRT"
+echo "========================================"
+
+# --- Check for .config file ---
+if [ ! -f "$CONFIG_FILE" ]; then
+  echo "[ERROR] No .config file found in current directory!"
+  echo "Please run this script inside your OpenWRT build root."
+  exit 1
+fi
+
+# --- Detect available Go installations ---
+GO_DIRS=(/usr/lib/go-*/)
+if [ ${#GO_DIRS[@]} -eq 0 ]; then
+  echo "[ERROR] No Go installation found under /usr/lib/go-*"
+  echo "Please install Go using: sudo apt install golang -y"
+  exit 1
+fi
+
+# --- Extract version numbers ---
+GO_VERSIONS=()
+for dir in "${GO_DIRS[@]}"; do
+  ver=$(basename "$dir" | sed -E 's/^go-([0-9]+\.[0-9]+).*$/\1/')
+  GO_VERSIONS+=("$ver")
+done
+
+# --- Sort versions and pick the latest ---
+IFS=$'\n' sorted=($(sort -V <<<"${GO_VERSIONS[*]}"))
+LATEST_VER="${sorted[-1]}"
+LATEST_PATH="/usr/lib/go-${LATEST_VER}/"
+
+echo "[INFO] Found Go versions: ${GO_VERSIONS[*]}"
+echo "[INFO] Using latest Go version: $LATEST_VER"
+echo "[INFO] Path: $LATEST_PATH"
+
+# --- Check if multiple versions exist ---
+if [ ${#GO_VERSIONS[@]} -gt 1 ]; then
+  echo "[WARN] Multiple Go versions detected!"
+  echo "If you prefer to use an older version, modify manually:"
+  echo "  CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT=\"/usr/lib/go-X.XX/\""
+  echo
+fi
+
+# --- Update .config ---
+if grep -q '^CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT=' "$CONFIG_FILE"; then
+  echo "[INFO] Updating existing CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT..."
+  sed -i "s|^CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT=.*|CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT=\"${LATEST_PATH}\"|" "$CONFIG_FILE"
+else
+  echo "[INFO] Adding CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT..."
+  echo "CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT=\"${LATEST_PATH}\"" >> "$CONFIG_FILE"
+fi
+
+# --- Verify result ---
+echo
+echo "[SUCCESS] Go path updated in .config:"
+grep 'CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT' "$CONFIG_FILE"
+
+echo
+echo "========================================"
+echo "✅ Go path update complete!"
+echo "========================================"
+echo
+echo "👉 If you wish to override manually, edit .config and change:"
+echo "   CONFIG_GOLANG_EXTERNAL_BOOTSTRAP_ROOT=\"/usr/lib/go-X.XX/\""
+echo