Create CursorRules That Enforce Your Team's Git Commit

Consistent commit messages are the backbone of a maintainable codebase. When every developer follows the same format, reading history becomes trivial, generating changelogs is automated, and code reviews flow smoother. Yet enforcing this consistency across a team often falls apart in practice. This guide shows you how to use CursorRules to automatically validate and enforce your team’s git commit message format, catching violations before they reach your repository’s history.

What Are CursorRules?

CursorRules are configuration files that define how Cursor (an AI-powered code editor) behaves when working with specific projects. These rules can validate code, suggest improvements, and enforce coding standards. What makes CursorRules powerful is their ability to intercept actions and provide feedback in real-time. You can extend this capability to validate git commit messages before they’re finalized.

Setting Up Your Commit Message Convention

Before creating the CursorRule, establish your commit message convention. Most teams adopt either Conventional Commits or a custom format that suits their workflow.

A typical Conventional Commits format looks like this:

<type>(<scope>): <description>

[optional body]

[optional footer]

The type field captures the intent: feat for new features, fix for bug patches, docs for documentation changes, refactor for code restructuring, test for adding tests, and chore for maintenance tasks. The scope is optional but identifies the affected component, and the description must be concise and lowercase.

For example, a valid Conventional Commit message looks like:

feat(auth): add password reset functionality
fix(api): resolve null pointer exception in user endpoint
docs(readme): update installation instructions

Creating the CursorRule for Commit Validation

Create a .cursorrules file in your project root. This file will contain the validation logic that Cursor applies when you attempt to commit. Here’s a practical implementation:

# .cursorrules
commit_validation:
  enabled: true
  convention: conventional_commits
  allowed_types:
    - feat
    - fix
    - docs
    - style
    - refactor
    - test
    - chore
    - perf
    - ci
    - build
  max_subject_length: 72
  scope_required: false
  enforce_body_line_length: 100

This configuration establishes the baseline rules. The enabled flag turns validation on, convention identifies your chosen format, and the remaining fields specify exact requirements.

Implementing Validation Logic

The .cursorrules file above provides configuration, but you need actual validation behavior. Create a validation script that Cursor can reference:

// scripts/validate-commit.js
const commitMessage = process.argv[2];
const conventionalCommits = require('conventional-commits-parser');

const config = {
  types: ['feat', 'fix', 'docs', 'style', 'refactor', 'test', 'chore', 'perf', 'ci', 'build'],
  maxSubjectLength: 72
};

function validateCommit(message) {
  const error = [];

  // Check format: type(scope): description
  const pattern = /^(\w+)(?:\(([^)]+)\))?: (.+)$/;
  const match = message.match(pattern);

  if (!match) {
    error.push(`Commit message must follow format: type(scope): description`);
    return error;
  }

  const [_, type, scope, description] = match;

  // Validate type
  if (!config.types.includes(type)) {
    error.push(`Invalid type "${type}". Allowed: ${config.types.join(', ')}`);
  }

  // Validate subject length
  if (description.length > config.maxSubjectLength) {
    error.push(`Subject exceeds ${config.maxSubjectLength} characters`);
  }

  // Check lowercase
  if (description !== description.toLowerCase()) {
    error.push('Subject must be lowercase');
  }

  // No period at end
  if (description.endsWith('.')) {
    error.push('Subject should not end with a period');
  }

  return error;
}

const errors = validateCommit(commitMessage);
if (errors.length > 0) {
  console.error('Commit validation failed:');
  errors.forEach(e => console.error(`  - ${e}`));
  process.exit(1);
}

console.log('Commit message is valid');

Hook this validation into your git workflow using a commit-msg hook:

#!/bin/bash
# .git/hooks/commit-msg

COMMIT_MSG_FILE=$1
COMMIT_MSG=$(cat "$COMMIT_MSG_FILE")

node scripts/validate-commit.js "$COMMIT_MSG"

Make the hook executable:

chmod +x .git/hooks/commit-msg

Advanced CursorRule Configuration

For teams wanting stricter enforcement, extend your CursorRule with additional constraints:

# .cursorrules - Advanced configuration
commit_validation:
  enabled: true

  # Require specific types only
  allowed_types:
    - feat
    - fix
    - docs
    - refactor
    - test

  # Enforce scope for certain types
  scope_rules:
    feat: required
    fix: required
    docs: optional
    refactor: optional
    test: optional

  # Body and footer rules
  body_required_for_types:
    - feat
    - fix
  footer_pattern: "^((BREAKING CHANGE|Closes|Refs|Resolved): .+)"

  # Auto-fix suggestions
  auto_fix:
    lowercase_subject: true
    trim_whitespace: true
    remove_trailing_period: true

This configuration requires scopes for features and fixes, mandates body text for significant changes, and enforces a footer pattern for linking issues or PRs.

A common problem with git hooks is that .git/hooks/ is not tracked by version control, so new team members miss the validation entirely. Husky solves this by storing hooks in a committed directory and installing them automatically via npm install.

Set up Husky alongside your CursorRule validation:

npm install --save-dev husky
npx husky init

Then create the hook file that Husky manages:

# .husky/commit-msg
#!/bin/sh
node scripts/validate-commit.js "$(cat $1)"

Commit .husky/ to your repository. Every developer who runs npm install gets the hooks installed automatically. Combined with your .cursorrules file—which is also committed—the full enforcement stack travels with the repository.

Generating Changelogs from Validated Commits

One of the largest payoffs from enforcing Conventional Commits is automated changelog generation. Once every commit follows the format, tools like conventional-changelog or release-please can parse your git history and produce structured changelogs automatically.

Add the generator to your package scripts:

{
  "scripts": {
    "changelog": "conventional-changelog -p angular -i CHANGELOG.md -s"
  }
}

Run it before each release to produce a changelog that groups commits by type—features, fixes, performance improvements, and breaking changes—without any manual editing. The discipline enforced by your CursorRule and Husky hook pays dividends here: messy commit messages produce messy changelogs.

Distributing Rules Across Your Team

Once you’ve created and tested your CursorRules, distribute them consistently. The simplest approach is committing the .cursorrules file to your repository. Team members clone the repo and Cursor automatically picks up the rules.

For organization-wide rules, consider a shared configuration repository that teams can include as a git submodule. This approach ensures every project uses the same baseline rules while allowing project-specific overrides.

Handling Edge Cases and Exemptions

Real teams hit edge cases that pure regex validation struggles with. A few patterns appear repeatedly.

Merge commits. Git auto-generates merge commit messages like Merge branch 'feature/auth' into main. These don’t follow Conventional Commits format and shouldn’t be rejected. Update your validation script to skip messages that start with Merge:

function validateCommit(message) {
  // Skip auto-generated merge commits
  if (message.startsWith('Merge ') || message.startsWith('Revert ')) {
    return [];
  }
  // ... rest of validation
}

WIP commits on feature branches. Some developers use wip: as a shorthand while mid-task. Rather than banning WIP commits outright, you can allow them on non-main branches by reading the current branch name inside the hook:

#!/bin/bash
# .husky/commit-msg

BRANCH=$(git rev-parse --abbrev-ref HEAD)
MSG=$(cat "$1")

# Allow WIP only on feature branches
if echo "$BRANCH" | grep -qE "^(feature|fix|chore)/"; then
  if echo "$MSG" | grep -qi "^wip:"; then
    exit 0
  fi
fi

node scripts/validate-commit.js "$MSG"

Breaking change notation. Conventional Commits signals breaking changes with a ! after the type or a BREAKING CHANGE: footer. Add explicit support for this in your validation regex so valid breaking change commits are not rejected:

// Allow breaking change marker
const pattern = /^(\w+)(?:\(([^)]+)\))?(!)?:\ (.+)$/;

Documenting these edge cases in your .cursorrules file or an adjacent CONTRIBUTING.md prevents the inevitable “why did my commit get rejected?” question from new team members.

Testing Your Implementation

Before rolling out to your team, validate the rules work correctly. Create test commit messages covering various scenarios:

# These should pass
git commit -m "feat(api): add user authentication"
git commit -m "fix(db): resolve connection timeout"
git commit -m "docs: update README"

# These should fail
git commit -m "WIP: some changes"
git commit -m "feat: Added new feature"
git commit -m "update stuff"

Run each test and confirm the validation behaves as expected. Adjust your rules based on feedback from team members—strictness must balance with practicality.

Maintaining Your Rules Over Time

As your project evolves, your commit conventions will too. Review your CursorRules during quarterly planning or when taking on new project types. Keep the documentation current so new team members understand the reasoning behind each rule.

A well-maintained commit message convention, enforced through CursorRules, eliminates guesswork and keeps your git history clean. Your future self—and your teammates—will thank you when browsing through months of commits to find that specific change.

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