Write Better Code History: The Complete Guide to Git Commit Messages

Clean Commits, Clear Communication, Stronger Collaboration

Most of our day-to-day work in studies and software careers happens with code. When you work alone or with a team, Git becomes your memory. Every commit message is a small note to your future self and to other developers.

Table of contents
1. Why Git Commit Messages Matter 2. What Is a Git Commit Message? 3. Basic Structure of a Good Commit Message 4. Common Commit Message Types 5. How to Write a Good Commit Message 6. Bad vs Good Commit Messages 7. Commit Message Best Practices 8. Why Good Commit Messages Improve Productivity 9. Simple Commit Message Checklist

Why Git Commit Messages Matter

Many beginners think commit messages are not important and write messages like:

  • update
  • fix bug
  • final version
  • test

But after a few weeks or months, when you look back at your project, you will not understand what was changed, why it was changed, or where a bug was introduced.

Imagine you are working in a team, and your manager asks:

“Why did the login stop working last Friday?”

If your commit messages are clear, you can easily find:

  • Which commit caused the issue
  • What exactly was changed
  • Who worked on it

If your messages are unclear, you will waste time checking code line by line. That is why good git commit messages are very important.

What Is a Git Commit Message?

A git commit message is a short description of what you changed and why you changed it. Each commit message is stored permanently in Git history.

A good commit message answers this question:
“If I read this message after 6 months, will I understand the change?”

Basic Structure of a Good Commit Message

<type>: <short summary>

<optional detailed description>
fix: resolve login validation error

Password validation failed when special characters were used.
Added proper regex handling and test cases.

Common Commit Message Types

Using a type makes your commit history more readable.

Most used types:

  • feat – A new feature
  • fix – A bug fix
  • docs – Documentation changes
  • style – Formatting, spacing
  • refactor – Code improvement
  • test – Tests
  • chore – Maintenance tasks

Examples: 

feat: add user profile edit page
fix: correct total price calculation
docs: update README installation steps
refactor: simplify authentication logic

How to Write a Good Commit Message

1. Use the Imperative Mood

Write messages like you are giving a command.

✅ Good

  • add validation for email field
  • fix payment calculation bug

❌ Bad

  • added validation
  • fixed a bug

2. Keep the First Line Short

Write messages limit to 50 characters and clear and meaningful.

Example: 

feat: enable password reset via email

3. Explain "Why" in the Description

The code already shows what changed. The message should explain why.

Example: 

fix: prevent app crash on empty input
    
    The app crashed when the input field was empty.
    Added null checks and default values.

4. One Commit = One Purpose

Do not mix unrelated changes.

❌ Bad

fix login bug and update UI and add README

✅ Good

fix: handle invalid login credentials
style: improve login page layout
docs: update README with screenshots

Bad vs Good Commit Messages

❌ Bad Examples

  • update
  • final
  • changes done
  • bug fix

✅ Good Examples

  • feat: implement user registration API
  • fix: handle null pointer exception in order service
  • refactor: reduce duplicate code in payment module
  • docs: add API usage examples

Commit Message Best Practices

  • Commit often, but with meaning
  • Write messages for humans, not machines
  • Be consistent with your format
  • Assume someone else will read your commits
  • Your future self is also “someone else” `Hee Heee`

Why Good Commit Messages Improve Productivity

  • Save time

    You can quickly understand project history without reading all the code.

  • Improve Team CommunicationYour commit messages explain your thinking to teammates.

  • Easier Debugging

    You can identify when and why a bug was introduced.

  • Professional DevelopmentGood commit history shows:

    • Clean work habits
    • Strong communication skills
    • Industry-level practices

Simple Commit Message Checklist

Before committing, ask yourself:

  • Does this explain what changed?
  • Does it explain why?
  • Is it short and clear?
  • Is it related to only one task?

Don’t try to be perfect from day one. Start writing clear, meaningful, and honest commit messages.