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chinkanchinkan/RustFox/.agents/skills/git-guardrails-claude-code/SKILL.md

git-guardrails-claude-code

Skill11 starsChanged 41 days agoMITView on GitHub

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.

  • Deletes or force-pushes
  • Commits and pushes

We split this skill into the rules it gives an agent

7 rules. 5 are common, 0 are distinctive, and 2 are very specific to this project.

  • 5

    Common

    Most of the 78 edited versions we read keep these.

  • 0

    Distinctive

    This author's own choices. Worth a look.

  • 2

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Common:

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

    line 18
  2. Very specific:

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

    line 24
  3. Common:

    Add to the appropriate settings file:

    line 39
  4. Very specific:

    If the settings file already exists, merge the hook into the existing hooks.PreToolUse array.

    line 81
  5. Common:

    Ask if user wants to add or remove any patterns from the blocked list.

    line 85
  6. Common:

    Run a quick test:

    line 89
  7. Common:

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

    line 95

“Common” is measured: kept by at least 6 in 10 of the 78 edited versions of this file we could read. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

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.

Download now (ZIP)

Trending

Rising: 2 new projects took it in the last 4 weeks, 2× the 4 weeks before.thin data

Week of Aug 30: 0 new projectsWeek of Sep 6: 0 new projectsWeek of Sep 13: 1 new projectWeek of Sep 20: 0 new projectsWeek of Sep 27: 1 new projectWeek of Oct 4: 1 new projectWeek of Oct 11: 0 new projectsWeek of Oct 18: 0 new projects
Aug 2026Sep 2026Oct 2026
New projects taking a version of this file each week, over the 8 weeks our latest run read: only 3 in all, so this is a hint, not a trend.

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