feat: Add install.sh for one-line skill distribution and update

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

install.sh

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+# ============================================================
+# spec-coding-skills 安装/更新脚本
+# 用法: bash <(curl -sL <raw-url>/install.sh)
+#   或: bash install.sh [目标目录]
+# ============================================================
+set -euo pipefail
+
+REPO_URL="https://git.internal.intelligrow.cn/zhangfucai/spec-coding-skills.git"
+SKILLS_SRC=".claude/skills"
+DEFAULT_TARGET=".claude/skills"
+
+GREEN='\033[0;32m'; YELLOW='\033[1;33m'; CYAN='\033[0;36m'; NC='\033[0m'
+log_info()  { echo -e "${GREEN}[INFO]${NC}  $1"; }
+log_warn()  { echo -e "${YELLOW}[WARN]${NC}  $1"; }
+log_title() { echo -e "${CYAN}$1${NC}"; }
+
+TARGET="${1:-$DEFAULT_TARGET}"
+TMP_DIR=$(mktemp -d)
+trap "rm -rf $TMP_DIR" EXIT
+
+# ---------- 拉取最新 ----------
+log_title "📦 spec-coding-skills 安装/更新"
+echo ""
+log_info "拉取最新版本..."
+git clone --depth 1 --quiet "$REPO_URL" "$TMP_DIR"
+
+VERSION=$(git -C "$TMP_DIR" describe --tags --always 2>/dev/null || git -C "$TMP_DIR" rev-parse --short HEAD)
+log_info "版本: $VERSION"
+
+# ---------- 统计变更 ----------
+NEW=0
+UPDATED=0
+SKIPPED=0
+KEPT=0
+
+mkdir -p "$TARGET"
+
+# 遍历上游 skill 目录
+for skill_dir in "$TMP_DIR/$SKILLS_SRC"/*/; do
+  [ -d "$skill_dir" ] || continue
+  skill_name=$(basename "$skill_dir")
+  src_file="$skill_dir/SKILL.md"
+  dst_dir="$TARGET/$skill_name"
+  dst_file="$dst_dir/SKILL.md"
+
+  [ -f "$src_file" ] || continue
+
+  if [ ! -f "$dst_file" ]; then
+    # 新 skill，直接复制
+    mkdir -p "$dst_dir"
+    cp "$src_file" "$dst_file"
+    log_info "✨ 新增: $skill_name"
+    NEW=$((NEW + 1))
+  elif diff -q "$src_file" "$dst_file" >/dev/null 2>&1; then
+    # 内容一致，跳过
+    SKIPPED=$((SKIPPED + 1))
+  else
+    # 内容不同：上游有更新 或 用户本地修改过
+    # 策略：备份本地版本，写入上游新版本
+    cp "$dst_file" "$dst_file.local.bak"
+    cp "$src_file" "$dst_file"
+    log_warn "🔄 更新: $skill_name （本地版本已备份为 SKILL.md.local.bak）"
+    UPDATED=$((UPDATED + 1))
+  fi
+done
+
+# 复制模板文件（非 skill 目录的文件）
+for tpl_file in "$TMP_DIR/$SKILLS_SRC"/*.template "$TMP_DIR/$SKILLS_SRC"/*.md; do
+  [ -f "$tpl_file" ] || continue
+  tpl_name=$(basename "$tpl_file")
+  dst="$TARGET/$tpl_name"
+
+  if [ ! -f "$dst" ]; then
+    cp "$tpl_file" "$dst"
+    log_info "✨ 新增模板: $tpl_name"
+    NEW=$((NEW + 1))
+  elif ! diff -q "$tpl_file" "$dst" >/dev/null 2>&1; then
+    cp "$dst" "$dst.local.bak"
+    cp "$tpl_file" "$dst"
+    log_warn "🔄 更新模板: $tpl_name （本地版本已备份为 ${tpl_name}.local.bak）"
+    UPDATED=$((UPDATED + 1))
+  else
+    SKIPPED=$((SKIPPED + 1))
+  fi
+done
+
+# ---------- 汇总 ----------
+echo ""
+log_title "✅ 完成！"
+echo ""
+echo "  📁 目标目录: $TARGET"
+echo "  📦 版本:     $VERSION"
+echo ""
+echo "  ✨ 新增: $NEW"
+echo "  🔄 更新: $UPDATED（本地版本已备份为 .local.bak）"
+echo "  ⏭️  无变化: $SKIPPED"
+echo ""
+
+if [ "$UPDATED" -gt 0 ]; then
+  log_warn "有 $UPDATED 个文件被更新，本地修改已备份为 .local.bak"
+  log_warn "如需恢复本地版本: mv SKILL.md.local.bak SKILL.md"
+  log_warn "如需对比差异:     diff SKILL.md SKILL.md.local.bak"
+fi