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git-guardrails-claude-code

git-guardrails-claude-code

github.com/timschochAgent workflows0142 installsUpdated 4d ago
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About git-guardrails-claude-code

A Claude Code skill that installs a PreToolUse hook to block selected dangerous Git commands before execution. It is for users who want project-wide or global guardrails with customizable blocked patterns.

Key features

  1. 01Blocks dangerous Git commands
  2. 02Supports project or global setup
  3. 03Allows custom blocked patterns
  4. 04Includes a verification step

Use cases

  1. 01Prevent Claude from running git push
  2. 02Guard against hard resets or branch deletion
  3. 03Set Git restrictions for a project

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/timschoch/mattpocock-skills --skill git-guardrails-claude-code

After installing, type/git-guardrails-claude-codein Claude Code to confirm it loaded.

Bundled filesagents/openai.yamlscripts/block-dangerous-git.sh

Details

From the project README

Setup Git Guardrails

Sets up a PreToolUse hook that intercepts and blocks dangerous git commands before Claude executes them.

What Gets Blocked

  • git push (all variants including --force)
  • git reset --hard
  • git clean -f / git clean -fd
  • git branch -D
  • git checkout . / git restore .

When blocked, Claude sees a message telling it that it does not have authority to access these commands.

Steps

1. Ask scope

Ask the user: install for this project only (.claude/settings.json) or all projects (~/.claude/settings.json)?

2. Copy the hook script

The bundled script is at: scripts/block-dangerous-git.sh

Copy it to the target location based on scope:

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

Make it executable with chmod +x.

3. Add hook to settings

Add to the appropriate 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"
          }
        ]
      }
    ]
  }
}

If the settings file already exists, merge the hook into the existing hooks.PreToolUse array. Don't overwrite other settings.

4. Ask about customization

Ask if user wants to add or remove any patterns from the blocked list. Edit the copied script accordingly.

5. Verify

Run a quick test:

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

Should exit with code 2 and print a BLOCKED message to stderr.

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