Git Guardrails Claude Code

DevOps & Security

git-guardrails-claude-code

Git Guardrails Claude Code is an Agent Skill for devops & security published in the vinvcn/mattpocock-skills-zh-CN repository on GitHub: a SKILL.md instruction file an AI agent can load to do this task.

设置 Claude Code hooks，在危险 git commands（push、reset --hard、clean、branch -D 等）执行前阻止它们。适用于用户想防止破坏性 git 操作、添加 git safety hooks，或在 Claude Code 中阻止 git push/reset 时。

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QUICK START

How to use this skill

Bring this guide into your coding agent with a prompt tailored to the tool you use.

Open your project in Codex.
Copy and paste the prompt below.
Review files and risks before approving any action.

Prompt to paste

Inspect the Agent Skill at https://github.com/vinvcn/mattpocock-skills-zh-CN/blob/HEAD/skills/misc/git-guardrails-claude-code/SKILL.md and all supporting files. Report provenance, permissions, scripts, dependencies, and security risks. Propose an exact installation into .agents/skills/git-guardrails-claude-code, but wait for my approval before writing files or running scripts.

Copying this prompt does not install or run the skill. Review third-party files before use.

Setup Git Guardrails

设置一个 PreToolUse hook，在 Claude 执行危险 git commands 前拦截并阻止它们。

What Gets Blocked

git push（包括 --force 在内的所有 variants）
git reset --hard
git clean -f / git clean -fd
git branch -D
git checkout . / git restore .

被阻止时，Claude 会看到一条 message，说明它无权访问这些 commands。

Steps

1. Ask scope

询问用户：只为当前 project 安装（.claude/settings.json），还是为所有 projects 安装（~/.claude/settings.json）？

2. Copy the hook script

bundled script 位于：scripts/block-dangerous-git.sh

根据 scope 复制到目标位置：

Project: .claude/hooks/block-dangerous-git.sh
Global: ~/.claude/hooks/block-dangerous-git.sh

用 chmod +x 让它可执行。

3. Add hook to settings

添加到对应 settings file：

Project (.claude/settings.json):

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": "\"$CLAUDE_PROJECT_DIR\"/.claude/hooks/block-dangerous-git.sh"
          }
        ]
      }
    ]
  }
}

Global (~/.claude/settings.json):

{
  "hooks": {
    "PreToolUse": [
      {
        "matcher": "Bash",
        "hooks": [
          {
            "type": "command",
            "command": "~/.claude/hooks/block-dangerous-git.sh"
          }
        ]
      }
    ]
  }
}

如果 settings file 已存在，把 hook merge 到现有 hooks.PreToolUse array 中，不要覆盖其他 settings。

4. Ask about customization

询问用户是否要在 blocked list 中添加或移除 patterns。相应编辑复制后的 script。

5. Verify

运行快速测试：

echo '{"tool_input":{"command":"git push origin main"}}' | <path-to-script>

应以 code 2 退出，并向 stderr 打印 BLOCKED message。