About

Imported from mattpocock/skills (skills/misc/git-guardrails-claude-code/SKILL.md) via skills.sh. Install upstream with npx skills add mattpocock/skills --skill git-guardrails-claude-code. Copyright stays with the author.

Setup Git Guardrails

Name: git-guardrails-claude-code
Author: mattpocock

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.

Use it

Copy one of these into your project. Installing also returns the manifest and these snippets.

yaml

targets:
  - https://api.opensmartroute.ai/api/v1/registry/mattpocock-skills-git-guardrails-claude-code/manifest   # or paste the manifest below

Manifest

An Open Capability Manifest: the router reads it to know what this does, what it costs and when to pick it.

mattpocock-skills-git-guardrails-claude-code.ocm.jsonjson

{
  "ocm": "1",
  "id": "mattpocock-skills-git-guardrails-claude-code",
  "kind": "skill",
  "name": "git-guardrails-claude-code",
  "description": "Set up Claude Code hooks to block dangerous git commands (push, reset --hard, clean, branch -D, etc.) before they execute. Use when user wants to prevent destructive git operations, add git safety hooks, or block git push/reset in Claude Code.",
  "publisher": "mattpocock",
  "version": "1.0.0",
  "capabilities": {
    "domains": [
      "coding"
    ],
    "tags": [
      "skill-md",
      "skills-sh"
    ],
    "languages": [
      "en"
    ]
  },
  "quality_prior": 0.6,
  "examples": [
    "Set up Claude Code hooks to block dangerous git commands (push, reset --hard, clean, branch -D, etc.) before they execute. Use when user wants to prevent destructive git operations, add git safety hooks, or block git push/reset in Claude Code."
  ],
  "primary": false,
  "metadata": {
    "source": {
      "provider": "skills.sh",
      "repository": "https://github.com/mattpocock/skills",
      "path": "skills/misc/git-guardrails-claude-code/SKILL.md",
      "ref": "HEAD",
      "url": "https://www.skills.sh/mattpocock/skills/git-guardrails-claude-code",
      "key": "mattpocock/skills/skills/misc/git-guardrails-claude-code/SKILL.md"
    }
  },
  "instructions": "# Setup Git Guardrails\n\nSets up a PreToolUse hook that intercepts and blocks dangerous git commands before Claude executes them.\n\n## What Gets Blocked\n\n- `git push` (all variants including `--force`)\n- `git reset --hard`\n- `git clean -f` / `git clean -fd`\n- `git branch -D`\n- `git checkout .` / `git restore .`\n\nWhen blocked, Claude sees a message telling it that it does not have authority to access these commands.\n\n## Steps\n\n### 1. Ask scope\n\nAsk the user: install for **this project only** (`.claude/settings.json`) or **all projects** (`~/.claude/settings.json`)?\n\n### 2. Copy the hook script\n\nT",
  "cost": {
    "context_tokens": 503
  }
}

Fetch it by URL: GET /api/v1/registry/mattpocock-skills-git-guardrails-claude-code/manifest?version=1.0.0

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