diff --git a/build.sh b/build.sh
index 498073a..af8f2ad 100644
--- a/build.sh
+++ b/build.sh
@@ -68,6 +68,9 @@ for mod in pipeline_core pipeline_ops pipeline_dist pipeline-sdlc showcase tenan
     fi
 done
 
+# 6c. Runtime deps: pymupdf（office-text-extract 技能的 pdf 提取脚本依赖）
+"$cdir/py3/bin/pip" install pymupdf 2>&1 | tail -1
+
 # 6b. Deploy skills: global(public skills) + packs(skill pack manifests)
 if [ -d "pkgs/pipeline_core/skills_library" ]; then
     mkdir -p "$cdir/skills/global"
@@ -141,6 +144,29 @@ if [ -x "$cdir/bin/bwrap" ]; then
 else
     echo "  WARN: bwrap not available (deploy sandbox will degrade to dir isolation)"
 fi
+
+# 10.8 Install Node（office 技能脚本依赖，无 sudo：官方预编译二进制）
+# 解压到 bin/nodejs/，symlink node/npm/npx 到 bin/（start.sh 已把 $cdir/bin 加进 PATH）
+NODE_VER="v22.23.2"
+if [ ! -x "$cdir/bin/nodejs/bin/node" ]; then
+    echo "  node: downloading $NODE_VER (linux-x64) ..."
+    tmpn=$(mktemp -d)
+    if curl -sL --max-time 180 "https://nodejs.org/dist/$NODE_VER/node-$NODE_VER-linux-x64.tar.xz" -o "$tmpn/node.tar.xz" && \
+       tar -xJf "$tmpn/node.tar.xz" -C "$tmpn"; then
+        mkdir -p "$cdir/bin/nodejs"
+        cp -a "$tmpn/node-$NODE_VER-linux-x64/." "$cdir/bin/nodejs/"
+    else
+        echo "  WARN: node 下载失败（office 技能脚本不可用）"
+    fi
+    rm -rf "$tmpn"
+fi
+ln -sf nodejs/bin/node "$cdir/bin/node"
+ln -sf nodejs/bin/npm "$cdir/bin/npm"
+ln -sf nodejs/bin/npx "$cdir/bin/npx"
+if [ -x "$cdir/bin/node" ]; then
+    echo "  node: $("$cdir/bin/node" --version)"
+fi
+
 # 6. Fix auto-assign created_by in CRUD dspys (xls2ui overwritten)
 for d in sd_projects sd_iterations; do
     for t in add update; do