Conventional Commit Message Regex for Python

What this pattern does

This page provides a comprehensive, battle-tested regular expression for matching conventional commit message, ported and verified for Python. A rigorously tested regex reduces debugging time and protects your application from edge-case failures. The snippet below is ready to drop into your Python project — whether you're validating in a Django view, a FastAPI endpoint, or a standalone data processing script.

Python Implementation

# Conventional Commit Message
# ReDoS-safe | RegexVault — Dev & Systems > Git

import re

conventional_commit_message_pattern = re.compile(r'^(feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert|wip)(?:\(([a-zA-Z0-9\-_/]+)\))?(!)?: (.+)$')

def validate_conventional_commit_message(value: str) -> bool:
    return bool(conventional_commit_message_pattern.fullmatch(value))

# Example
print(validate_conventional_commit_message("feat: add user authentication"))  # True

Test Cases

When to use this pattern

This pattern is drawn from the Dev & Systems > Git category and carries a ReDoS-safe certification. That matters for Python developers because particularly important in Python web servers where CPU-bound regex operations can stall concurrent request handling. RegexVault audits patterns against known backtracking attack vectors, ensuring you have the necessary context before using this regex in a high-stakes production environment.

Common Pitfalls

Technical Notes

Group 1 = type, group 2 = scope (optional), group 3 = ! breaking change (optional), group 4 = description. BREAKING CHANGE can also appear in the footer. Conventional commits enable automated changelog generation.