Agent skill · software engineering · mattpocock
git-guardrails-claude-code
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.
Why this skill is useful
Adds a custom script to block dangerous git commands, preventing destructive operations that the AI wouldn't know to enforce on its own.
What it needs
Requires bash installed locally. About 1k tokens when loaded. Last updated 2026-08-06. 207,363 stars on the source repository.
What this skill does
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): Global (~/.claude/settings.json): 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: Should exit with code 2 and print a BLOCKED message to stderr.
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills mattpocock/git-guardrails-claude-code