diff --git a/.claude/commands/update-claude-code.md b/.claude/commands/update-claude-code.md
new file mode 100644
index 00000000..95ff03dd
--- /dev/null
+++ b/.claude/commands/update-claude-code.md
@@ -0,0 +1,57 @@
+# Update Claude Code
+
+Claude Code の最新バージョンをチェックして更新します。
+
+## 実行内容
+
+1. npm/global.json から現在の `@anthropic-ai/claude-code` のバージョンを取得
+2. npm registry から最新バージョンを取得
+3. バージョンを比較して、更新が必要な場合は global.json を更新
+4. リリースノートのURLを表示
+
+## 使用方法
+
+```bash
+/update-claude-code
+```
+
+## 実装
+
+```bash
+#!/usr/bin/env bash
+set -euo pipefail
+
+# スクリプトのディレクトリを取得
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "${SCRIPT_DIR}/../.." && pwd)"
+
+# 環境変数を設定して自動更新を有効化
+export AUTO_UPDATE=true
+export CI=true
+
+# Claude Code更新スクリプトを実行
+if [[ -f "${PROJECT_ROOT}/script/update-claude-code.sh" ]]; then
+    bash "${PROJECT_ROOT}/script/update-claude-code.sh"
+else
+    echo "Error: update-claude-code.sh が見つかりません"
+    exit 1
+fi
+
+# 更新があった場合の後処理
+if git diff --quiet npm/global.json; then
+    echo "✓ Claude Code は既に最新です"
+else
+    echo ""
+    echo "更新が完了しました。変更をコミットしてください:"
+    echo "  git add npm/global.json"
+    echo "  git commit -m 'chore: update Claude Code to latest version'"
+    echo ""
+    git diff npm/global.json
+fi
+```
+
+## 注意事項
+
+- このコマンドは config リポジトリ内で実行する必要があります
+- 更新後は手動でコミットとプッシュが必要です
+- CI環境では自動的に更新されます（確認プロンプトなし）
diff --git a/.github/workflows/update-libraries.yml b/.github/workflows/update-libraries.yml
index 0e052e81..ddec14cb 100644
--- a/.github/workflows/update-libraries.yml
+++ b/.github/workflows/update-libraries.yml
@@ -28,6 +28,42 @@ jobs:
       - name: Refresh libraries
         run: npm run update:libs
 
+      - name: Generate update summary
+        id: summary
+        run: |
+          {
+            echo "summary<<EOF"
+            if git diff --quiet npm/global.json package.json package-lock.json; then
+              echo "No updates available"
+            else
+              echo "## Updated Packages"
+              echo ""
+              if ! git diff --quiet npm/global.json; then
+                echo "### Global CLI Packages (npm/global.json)"
+                echo '```diff'
+                git diff npm/global.json | grep -E '^\+.*"version":|^-.*"version":' || echo "No version changes"
+                echo '```'
+                echo ""
+              fi
+              if ! git diff --quiet package.json; then
+                echo "### NPM Dev Dependencies (package.json)"
+                echo '```diff'
+                git diff package.json | grep -E '^\+.*".*":|^-.*".*":' | grep -v '^\+\+\+\|^---' || echo "No changes"
+                echo '```'
+                echo ""
+              fi
+              # Claude Code バージョンを特別に表示
+              if command -v jq >/dev/null 2>&1 && [[ -f npm/global.json ]]; then
+                CLAUDE_VERSION=$(jq -r '.dependencies["@anthropic-ai/claude-code"].version' npm/global.json)
+                echo "### 🤖 Claude Code"
+                echo "Current version: **${CLAUDE_VERSION}**"
+                echo ""
+                echo "[Release Notes](https://github.com/anthropics/claude-code/releases)"
+              fi
+            fi
+            echo "EOF"
+          } >> $GITHUB_OUTPUT
+
       - name: Create pull request
         uses: peter-evans/create-pull-request@v6
         with:
@@ -39,6 +75,14 @@ jobs:
           body: |
             Automated update generated by `npm run update:libs`.
 
-            - Ensures Codex/Claude Code toolchain definitions stay current
-            - Refreshes npm devDependencies and global CLI manifest
+            ${{ steps.summary.outputs.summary }}
+
+            ---
+
+            **What's Updated:**
+            - Codex/Claude Code toolchain definitions
+            - NPM devDependencies
+            - Global CLI manifest (npm/global.json)
+
+            **Auto-generated by:** [update-libraries.yml](.github/workflows/update-libraries.yml)
           labels: dependencies
diff --git a/README.md b/README.md
index 89dc398c..06ac2241 100644
--- a/README.md
+++ b/README.md
@@ -237,10 +237,22 @@ Run the `commit_changes.sh` script with `REPO_PATH` set to this repository to ch
 
 ### Updating Codex & Claude Tooling
 
+#### Update All Libraries
+
 - Run `npm run update:libs` (wrapper for `script/update-libraries.sh`) to refresh npm devDependencies together with Codex/Claude Code CLI definitions captured in `npm/global.json`.
 - The script performs `npm-check-updates`, `npm install`, and re-synchronizes global CLI versions via `npm view <package> version` before running lint/tests to verify the updated toolchain.
 - Packages that currently require newer Node.js releases (`semantic-release`, `@semantic-release/github`) are excluded by default. Override the exclusion list with `UPDATE_LIBS_REJECT="pkg1,pkg2" npm run update:libs` when you are ready to bump them.
 - `.github/workflows/update-libraries.yml` executes the same script weekly and opens a PR whenever it produces changes, ensuring Codex/Claude Code tooling stays current without manual effort.
+
+#### Update Claude Code Only
+
+- Run `npm run update:claude` (wrapper for `script/update-claude-code.sh`) to check and update **only** the `@anthropic-ai/claude-code` package to the latest version.
+- The script compares the current version in `npm/global.json` with the latest available version on npm registry.
+- If a newer version is available, it automatically updates `npm/global.json` and displays the release notes URL.
+- Use `/update-claude-code` Claude command for interactive update within Claude Code sessions.
+
+#### Commit Requirements
+
 - Commits that touch release-critical files (`package*.json`, `npm/global.json`, `.devcontainer/codex*`, `.codex/**`) **must** use a release-triggering Conventional Commit type (`feat`, `fix`, `perf`, `revert`, or `docs`). Commitlint enforces this so semantic-release can publish automatically when tooling versions change.
 
 #### Global CLI version source of truth
diff --git a/package.json b/package.json
index 51755e84..8a196515 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
     "test:watch": "jest --runInBand --watch",
     "test:coverage": "jest --runInBand --coverage",
     "update:libs": "bash script/update-libraries.sh",
+    "update:claude": "bash script/update-claude-code.sh",
     "prepare": "husky"
   },
   "devDependencies": {
diff --git a/script/update-claude-code.sh b/script/update-claude-code.sh
new file mode 100755
index 00000000..04da07ec
--- /dev/null
+++ b/script/update-claude-code.sh
@@ -0,0 +1,93 @@
+#!/usr/bin/env bash
+# ============================================================================
+# Claude Code Version Update Script
+# @anthropic-ai/claude-code の最新バージョンをチェックして更新します
+# ============================================================================
+
+set -euo pipefail
+
+# カラー出力
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+RED='\033[0;31m'
+NC='\033[0m' # No Color
+
+log_info() { echo -e "${BLUE}[INFO]${NC} $1"; }
+log_success() { echo -e "${GREEN}[SUCCESS]${NC} $1"; }
+log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
+log_error() { echo -e "${RED}[ERROR]${NC} $1"; }
+
+# スクリプトのディレクトリを取得
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
+
+GLOBAL_FILE="${PROJECT_ROOT}/npm/global.json"
+PACKAGE="@anthropic-ai/claude-code"
+
+log_info "Claude Code バージョン更新を開始します..."
+
+# jqの存在確認
+if ! command -v jq &> /dev/null; then
+    log_error "jq が必要です。インストールしてください: brew install jq"
+    exit 1
+fi
+
+# npmの存在確認
+if ! command -v npm &> /dev/null; then
+    log_error "npm が必要です。"
+    exit 1
+fi
+
+# global.jsonの存在確認
+if [[ ! -f "$GLOBAL_FILE" ]]; then
+    log_error "global.json が見つかりません: ${GLOBAL_FILE}"
+    exit 1
+fi
+
+# 現在のバージョンを取得
+current_version=$(jq -r ".dependencies[\"${PACKAGE}\"].version" "$GLOBAL_FILE")
+log_info "現在のバージョン: ${current_version}"
+
+# 最新バージョンを取得
+log_info "最新バージョンを確認中..."
+latest_version=$(npm view "$PACKAGE" version 2>/dev/null)
+
+if [[ -z "$latest_version" ]]; then
+    log_error "最新バージョンの取得に失敗しました"
+    exit 1
+fi
+
+log_info "最新バージョン: ${latest_version}"
+
+# バージョン比較
+if [[ "$current_version" == "$latest_version" ]]; then
+    log_success "Claude Code は既に最新バージョンです (${current_version})"
+    exit 0
+fi
+
+log_warn "バージョンが異なります: ${current_version} → ${latest_version}"
+
+# 更新するかどうかを確認（CI環境では自動的に更新）
+if [[ "${CI:-false}" != "true" ]] && [[ "${AUTO_UPDATE:-false}" != "true" ]]; then
+    read -p "更新しますか? (y/N): " -n 1 -r
+    echo
+    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+        log_info "更新をキャンセルしました"
+        exit 0
+    fi
+fi
+
+# global.jsonを更新
+log_info "global.json を更新中..."
+tmp_file=$(mktemp)
+jq --arg version "$latest_version" \
+  ".dependencies[\"${PACKAGE}\"].version = \$version" "$GLOBAL_FILE" > "$tmp_file"
+mv "$tmp_file" "$GLOBAL_FILE"
+
+log_success "Claude Code を ${current_version} → ${latest_version} に更新しました"
+
+# リリースノートのURLを表示
+log_info "リリースノート: https://github.com/anthropics/claude-code/releases"
+
+log_success "更新完了！"
diff --git a/script/update-libraries.sh b/script/update-libraries.sh
index 9fc5b942..74b14b8c 100755
--- a/script/update-libraries.sh
+++ b/script/update-libraries.sh
@@ -2,11 +2,25 @@
 
 set -euo pipefail
 
+# カラー出力
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
 REPO_PATH="${REPO_PATH:-$(cd "$(dirname "$0")/.." && pwd)}"
 cd "$REPO_PATH"
 
 log() {
-  printf '==> %s\n' "$1"
+  printf "${BLUE}==> %s${NC}\n" "$1"
+}
+
+log_success() {
+  printf "${GREEN}✓ %s${NC}\n" "$1"
+}
+
+log_warn() {
+  printf "${YELLOW}⚠ %s${NC}\n" "$1"
 }
 
 if ! command -v npx >/dev/null 2>&1; then
@@ -32,14 +46,36 @@ if [[ -f "$GLOBAL_FILE" ]] && command -v jq >/dev/null 2>&1; then
   tmp_file=$(mktemp)
   cp "$GLOBAL_FILE" "$tmp_file"
 
+  # 更新されたパッケージを追跡
+  declare -a updated_packages=()
+
   while IFS= read -r pkg; do
-    latest_version=$(npm view "$pkg" version)
+    current_version=$(jq -r ".dependencies[\"$pkg\"].version" "$GLOBAL_FILE")
+    latest_version=$(npm view "$pkg" version 2>/dev/null || echo "$current_version")
+
+    if [[ "$current_version" != "$latest_version" ]]; then
+      log_warn "Updating $pkg: $current_version → $latest_version"
+      updated_packages+=("$pkg: $current_version → $latest_version")
+    fi
+
     jq --arg pkg "$pkg" --arg version "$latest_version" \
       '.dependencies[$pkg].version = $version' "$tmp_file" >"${tmp_file}.next"
     mv "${tmp_file}.next" "$tmp_file"
   done < <(jq -r '.dependencies | keys[]' "$GLOBAL_FILE")
 
   mv "$tmp_file" "$GLOBAL_FILE"
+
+  # 更新サマリーを表示
+  if [[ ${#updated_packages[@]} -gt 0 ]]; then
+    echo ""
+    log "Updated packages summary:"
+    for update in "${updated_packages[@]}"; do
+      echo "  - $update"
+    done
+    echo ""
+  else
+    log_success "All global packages are already up to date"
+  fi
 else
   log "Skipping global CLI manifest update (missing $GLOBAL_FILE or jq)"
 fi
@@ -48,4 +84,12 @@ log "Running verification pipeline (lint + tests)"
 npm run lint
 npm test
 
-log "Library update complete"
+log_success "Library update complete"
+
+# Claude Code のバージョンを特別に表示
+if [[ -f "$GLOBAL_FILE" ]] && command -v jq >/dev/null 2>&1; then
+  claude_version=$(jq -r '.dependencies["@anthropic-ai/claude-code"].version' "$GLOBAL_FILE")
+  echo ""
+  log_success "Claude Code version: ${claude_version}"
+  echo ""
+fi