validate-branch-name

Git Flow branches must follow these patterns: • feature/ • release/v . . • hotfix/

Automations
Git
193

What it does and how to use it

A hook that automates git actions at key moments (before/after a tool runs, on save, etc.), without you having to think about it.

Install the hook (command above).
It runs automatically on the defined events.
Adjust the rules in the settings file if you want to fine-tune it.

Install (Claude Code)

mkdir -p .claude/hooks && curl -fsSL https://doutorai.pt/data/lib/hooks__validate-branch-name-2.md -o .claude/hooks/validate-branch-name-2.py

Paste this command into the terminal, in your project folder, and the component installs automatically.

Content

#!/usr/bin/env python3
import json
import sys
import re

try:
    input_data = json.load(sys.stdin)
except json.JSONDecodeError as e:
    print(f"Error: Invalid JSON input: {e}", file=sys.stderr)
    sys.exit(1)

tool_name = input_data.get("tool_name", "")
tool_input = input_data.get("tool_input", {})
command = tool_input.get("command", "")

# Only validate git checkout -b commands
if tool_name != "Bash" or "git checkout -b" not in command:
    sys.exit(0)

# Extract branch name
match = re.search(r'git checkout -b\s+([^\s]+)', command)
if not match:
    sys.exit(0)

branch_name = match.group(1

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