diff --git a/.gitea/workflows/checks.yml b/.gitea/workflows/checks.yml
index 9bf59d5e..32e7c6b5 100644
--- a/.gitea/workflows/checks.yml
+++ b/.gitea/workflows/checks.yml
@@ -26,6 +26,8 @@ env:
   SOURCE_SHA: ${{ github.event.workflow_run.head_sha }}
   SOURCE_EVENT: ${{ github.event.workflow_run.event }}
   COMMIT_LINT_REQUIRE_EMOJI: "1"
+  FNM_BIN: "/data/bin/fnm"
+  FNM_DIR: "/data/fnm"
 
 jobs:
   checks:
@@ -131,6 +133,29 @@ jobs:
           echo "========================================"
 
           cd "$REPO_DIR"
+          node_version=$(tr -d '[:space:]' < .node-version)
+          if ! [[ "$node_version" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo ".node-version 必须是完整的 Node.js 版本号: $node_version" >&2
+            exit 1
+          fi
+          if [ ! -x "$FNM_BIN" ]; then
+            echo "Prepare 未安装 fnm: $FNM_BIN" >&2
+            exit 1
+          fi
+
+          eval "$("$FNM_BIN" env --shell bash)"
+          exec 9>"${FNM_DIR}.install.lock"
+          flock 9
+          "$FNM_BIN" use --install-if-missing "$node_version"
+          flock -u 9
+
+          if [ "$(node --version)" != "v$node_version" ]; then
+            echo "Node.js 切换后版本不符合要求: $(node --version)" >&2
+            exit 1
+          fi
+          node --version
+          npm --version
+
           echo "📦 安装锁定的 Node.js 校验工具"
           npm ci --ignore-scripts --no-audit --no-fund --no-bin-links
 
diff --git a/.gitea/workflows/prepare.yml b/.gitea/workflows/prepare.yml
index 4cf23461..d009a1d2 100644
--- a/.gitea/workflows/prepare.yml
+++ b/.gitea/workflows/prepare.yml
@@ -23,6 +23,10 @@ concurrency:
 
 env:
   ACCESS_TOKEN: ${{ secrets.WORKFLOW }}
+  FNM_ARCHIVE_SHA256: "7807664f39d39fc518da1c35ba0181e4b3267603c4b1dedeb4b5fc6ae440a224"
+  FNM_BIN: "/data/bin/fnm"
+  FNM_DIR: "/data/fnm"
+  FNM_VERSION: "1.39.0"
   WORKSPACE_ROOT: "/data/workspace"
 
 jobs:
@@ -45,10 +49,9 @@ jobs:
             [curl]="curl"
             [flock]="util-linux"
             [realpath]="coreutils"
-            [node]="nodejs"
-            [npm]="npm"
+            [unzip]="unzip"
           )
-          required_commands=(git python3 python3.11 curl flock realpath node npm)
+          required_commands=(git python3 python3.11 curl flock realpath unzip)
           missing_commands=()
           missing_packages=()
           declare -A seen_packages=()
@@ -94,6 +97,34 @@ jobs:
 
           python3.11 -c 'import sys; raise SystemExit(0 if sys.version_info >= (3, 11) else "Python 3.11 or newer is required")'
 
+          fnm_installed=false
+          expected_fnm_version="fnm $FNM_VERSION"
+          current_fnm_version=""
+          if [ -x "$FNM_BIN" ]; then
+            current_fnm_version=$($FNM_BIN --version 2>/dev/null || true)
+          fi
+
+          if [ "$current_fnm_version" != "$expected_fnm_version" ]; then
+            echo "准备安装 $expected_fnm_version"
+            mkdir -p "$(dirname "$FNM_BIN")"
+            fnm_tmp_dir=$(mktemp -d)
+            trap 'rm -rf "$fnm_tmp_dir"' EXIT
+            fnm_archive="$fnm_tmp_dir/fnm-linux.zip"
+            curl -fsSL --retry 5 --retry-all-errors \
+              "https://github.com/Schniz/fnm/releases/download/v${FNM_VERSION}/fnm-linux.zip" \
+              -o "$fnm_archive"
+            printf '%s  %s\n' "$FNM_ARCHIVE_SHA256" "$fnm_archive" | sha256sum -c -
+            unzip -q "$fnm_archive" -d "$fnm_tmp_dir"
+            install -m 0755 "$fnm_tmp_dir/fnm" "${FNM_BIN}.new"
+            mv -f "${FNM_BIN}.new" "$FNM_BIN"
+            fnm_installed=true
+          fi
+
+          if [ "$($FNM_BIN --version)" != "$expected_fnm_version" ]; then
+            echo "fnm 安装后版本不符合要求: $($FNM_BIN --version 2>&1)" >&2
+            exit 1
+          fi
+
           {
             echo "## Prepare 环境"
             echo ""
@@ -105,12 +136,18 @@ jobs:
               version_line=${version_line//|/\\|}
               printf '| `%s` | `%s` |\n' "$command" "$version_line"
             done
+            printf '| `%s` | `%s` |\n' "fnm" "$($FNM_BIN --version)"
             echo ""
             if [ "$installed" = true ]; then
               echo "安装的包：\`${missing_packages[*]}\`"
             else
               echo "安装的包：无，所有命令已存在。"
             fi
+            if [ "$fnm_installed" = true ]; then
+              echo "安装的版本管理器：\`$expected_fnm_version\`"
+            else
+              echo "安装的版本管理器：无，\`$expected_fnm_version\` 已存在。"
+            fi
           } >> "$GITHUB_STEP_SUMMARY"
 
           echo "installed=$installed" >> "$GITHUB_OUTPUT"
@@ -205,6 +242,8 @@ jobs:
           fi
 
           resolved_sha=$(git --git-dir="$REPOSITORY_DIR" rev-parse "${HEAD_SHA}^{commit}")
+          echo "PREPARED_REPOSITORY_DIR=$REPOSITORY_DIR" >> "$GITHUB_ENV"
+          echo "PREPARED_SHA=$resolved_sha" >> "$GITHUB_ENV"
           {
             echo ""
             echo "## Prepare 仓库"
@@ -215,3 +254,42 @@ jobs:
           } >> "$GITHUB_STEP_SUMMARY"
 
           echo "Prepare 完成: $REPOSITORY_DIR @ $resolved_sha"
+
+      - name: 🟢 准备 Node.js
+        shell: bash
+        run: |
+          set -euo pipefail
+
+          node_version=$(git --git-dir="$PREPARED_REPOSITORY_DIR" show "${PREPARED_SHA}:.node-version" | tr -d '[:space:]')
+          if ! [[ "$node_version" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
+            echo ".node-version 必须是完整的 Node.js 版本号: $node_version" >&2
+            exit 1
+          fi
+          node_major=${node_version%%.*}
+          if [ "$node_major" -lt 20 ]; then
+            echo "Node.js 版本必须不低于 20: $node_version" >&2
+            exit 1
+          fi
+
+          mkdir -p "$FNM_DIR"
+          exec 9>"${FNM_DIR}.install.lock"
+          flock 9
+          "$FNM_BIN" install "$node_version"
+          flock -u 9
+
+          actual_node_version=$($FNM_BIN exec --using="$node_version" node --version)
+          actual_npm_version=$($FNM_BIN exec --using="$node_version" npm --version)
+          if [ "$actual_node_version" != "v$node_version" ]; then
+            echo "Node.js 安装后版本不符合要求: $actual_node_version" >&2
+            exit 1
+          fi
+
+          {
+            echo ""
+            echo "## Prepare Node.js"
+            echo ""
+            echo "- fnm：\`$($FNM_BIN --version)\`"
+            echo "- Node.js：\`$actual_node_version\`"
+            echo "- npm：\`$actual_npm_version\`"
+            echo "- 缓存目录：\`$FNM_DIR\`"
+          } >> "$GITHUB_STEP_SUMMARY"
diff --git a/.node-version b/.node-version
new file mode 100644
index 00000000..60ade1ae
--- /dev/null
+++ b/.node-version
@@ -0,0 +1 @@
+24.19.0
diff --git a/package-lock.json b/package-lock.json
index 22962084..9d720950 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,6 +5,9 @@
   "packages": {
     "": {
       "name": "playbook",
+      "engines": {
+        "node": ">=20"
+      },
       "devDependencies": {
         "markdownlint-cli": "0.48.0",
         "prettier": "3.9.6"
diff --git a/package.json b/package.json
index 473f963a..78100410 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,9 @@
 {
   "name": "playbook",
   "private": true,
+  "engines": {
+    "node": ">=20"
+  },
   "devDependencies": {
     "markdownlint-cli": "0.48.0",
     "prettier": "3.9.6"
diff --git a/test/test_tsl_syntax_reference.py b/test/test_tsl_syntax_reference.py
index 0ebd8d73..4fb71d3e 100644
--- a/test/test_tsl_syntax_reference.py
+++ b/test/test_tsl_syntax_reference.py
@@ -13,6 +13,7 @@ LOOKUP_PATH = SKILL_ROOT / "scripts" / "lookup.py"
 SKILL_PATH = SKILL_ROOT / "SKILL.md"
 CI_PATH = ROOT / ".gitea" / "workflows" / "checks.yml"
 PREPARE_PATH = ROOT / ".gitea" / "workflows" / "prepare.yml"
+NODE_VERSION_PATH = ROOT / ".node-version"
 
 
 def load_lookup_module():
@@ -445,8 +446,18 @@ class TslSyntaxReferenceTests(unittest.TestCase):
             "node_modules/prettier/bin/prettier.cjs --check skills/tsl-syntax-reference",
             workflow,
         )
-        self.assertIn("[node]=\"nodejs\"", prepare)
-        self.assertIn("[npm]=\"npm\"", prepare)
+        self.assertIn("[unzip]=\"unzip\"", prepare)
+        self.assertIn('FNM_BIN: "/data/bin/fnm"', prepare)
+        self.assertIn('FNM_DIR: "/data/fnm"', prepare)
+        self.assertIn('"$FNM_BIN" install "$node_version"', prepare)
+        self.assertNotIn('[node]="nodejs"', prepare)
+        self.assertNotIn('[npm]="npm"', prepare)
+        self.assertIn('"$FNM_BIN" use --install-if-missing "$node_version"', workflow)
+        self.assertIn("node --version", workflow)
+        self.assertRegex(
+            NODE_VERSION_PATH.read_text(encoding="utf-8").strip(),
+            r"^\d+\.\d+\.\d+$",
+        )
 
 
 if __name__ == "__main__":