Claude Code 三种安装法横评：原生脚本为何成首选

curl -fsSL https://claude.ai/install.sh | bash

irm https://claude.ai/install.ps1 | iex

Downloading Claude Code... 100%
Installing to ~/.local/bin/claude
Adding to PATH...
✓ Installation complete. Run `claude` to get started.

claude --version
claude doctor

npm install -g @anthropic-ai/claude-code

curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.40.1/install.sh | bash
# 关闭重开终端
nvm install 22
nvm use 22
node --version          # 应输出 v22.x.x
npm install -g @anthropic-ai/claude-code

npm update -g @anthropic-ai/claude-code
npm install -g @anthropic-ai/claude-code@latest   # 装指定版本

brew install --cask claude-code

brew upgrade --cask claude-code

claude

mkdir ~/todo-cli && cd ~/todo-cli
git init
echo "# Todo CLI" > README.md

claude

> 用 Python 写一个命令行待办管理器 todo.py：
> 支持 add/list/done/delete 四个子命令，数据存到 todos.json。
> 给 add/list 写好用法说明，list 按未完成在前排序。

import json, sys, os
from pathlib import Path

DB = Path(__file__).parent / "todos.json"

def load():
    return json.loads(DB.read_text()) if DB.exists() else []

def save(todos):
    DB.write_text(json.dumps(todos, ensure_ascii=False, indent=2))

def main():
    args = sys.argv[1:]
    if not args or args[0] in ("-h", "--help"):
        print("用法: todo.py [add <text> | list | done <id> | delete <id>]")
        return
    cmd, todos = args[0], load()
    if cmd == "add":
        text = " ".join(args[1:])
        todos.append({"id": len(todos)+1, "text": text, "done": False})
        save(todos); print(f"✓ 已添加 #{len(todos)}: {text}")
    elif cmd == "list":
        todos.sort(key=lambda t: t["done"])          # 未完成在前
        for t in todos:
            mark = "[x]" if t["done"] else "[ ]"
            print(f"{mark} #{t['id']} {t['text']}")
    elif cmd == "done":
        for t in todos:
            if t["id"] == int(args[1]): t["done"] = True
        save(todos); print(f"✓ 已完成 #{args[1]}")
    elif cmd == "delete":
        todos = [t for t in todos if t["id"] != int(args[1])]
        save(todos); print(f"✓ 已删除 #{args[1]}")

if __name__ == "__main__":
    main()

> 运行 python todo.py add 买牛奶，再 add 写周报，然后 list，把输出贴给我

✓ 已添加 #1: 买牛奶
✓ 已添加 #2: 写周报
[ ] #1 买牛奶
[ ] #2 写周报

claude -p "给 todo.py 的 delete 命令补充越界 id 的健壮处理，并写一段 50 字内的注释说明改动"

{
  "permissions": {
    "allow": ["read", "write", "shell"],
    "deny": ["shell:rm -rf *"]
  },
  "model": "claude-sonnet-4-6"
}

flowchart TD
    Start([🚀 想用 Claude Code]) --> Check{核对前置条件<br/>账号+网络+OS}
    Check -->|不满足| Fix[补账号 / 装 WSL / 接网络]
    Fix --> Check
    Check -->|满足| Choose{选安装法}

    Choose -->|"个人/首装"| Native[原生脚本<br/>curl install.sh]
    Choose -->|"CI/锁版本"| NPM[npm i -g<br/>需 Node18+]
    Choose -->|"Mac brew 党"| Brew[brew install --cask]

    Native --> Verify
    NPM --> Verify
    Brew --> Verify

    Verify[claude --version<br/>claude doctor] --> Auth{认证}
    Auth -->|浏览器| Browser[登录 Pro/Max/Teams]
    Auth -->|无头/CI| Key[export ANTHROPIC_API_KEY]

    Browser --> Project[cd 项目目录<br/>运行 claude]
    Key --> Project

    Project --> Task[下任务 → 看 diff → 确认]
    Task --> Ship([✅ 首跑成功])