source: Add rules for AI Coding

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# Huong Dan Viet Git Commit Message Trong Du An
> **Tham khao:** [Conventional Commits](https://www.conventionalcommits.org/)
---
## Muc Luc
1. [Nguyen Tac Chung](#1-nguyen-tac-chung)
2. [Cau Truc Commit Message](#2-cau-truc-commit-message)
3. [Cac Loai Type](#3-cac-loai-type)
4. [Scope - Pham Vi Thay Doi](#4-scope---pham-vi-thay-doi)
5. [Quy Tac Viet Description](#5-quy-tac-viet-description)
6. [Commit Message Voi Body Va Footer](#6-commit-message-voi-body-va-footer)
7. [Bang Vi Du Day Du](#7-bang-vi-du-day-du)
8. [Vi Du Thuc Te Trong Du An](#8-vi-du-thuc-te-trong-du-an)
9. [Nhung Loi Thuong Gap](#9-nhung-loi-thuong-gap)
10. [Checklist Truoc Khi Commit](#10-checklist-truoc-khi-commit)
---
## 1. Nguyen Tac Chung
Viet commit message chuan giup:
| # | Loi ich | Mo ta |
|---|---------|-------|
| 1 | **Doc lich su de dang** | Nhin vao git log biet ngay thay doi gi |
| 2 | **Tu dong tao changelog** | Cac tool co the tu dong tao changelog tu commit message |
| 3 | **Lien ket voi issue tracker** | De dang trace commit voi task/ticket |
| 4 | **Review code hieu qua** | Nguoi review hieu nhanh muc dich cua commit |
| 5 | **Tu dong versioning** | Xac dinh phien ban tu dong (semantic versioning) dua tren type |
---
## 2. Cau Truc Commit Message
### Format chung
```
<type>(<scope>): <description>
```
Trong do:
| Thanh phan | Bat buoc | Mo ta | Vi du |
|-----------|----------|-------|-------|
| `type` | Co | Loai thay doi (feat, fix, chore...) | `feat` |
| `scope` | Khong | Pham vi/module bi anh huong | `auth`, `api`, `user` |
| `description` | Co | Mo ta ngan, duoi 50 ky tu, viet hoa dau cau, khong dau cham cuoi | `add Google login` |
### Format day du (voi body va footer)
```
<type>(<scope>): <description>
<body>
<footer>
```
### Vi du nhanh
```
feat(auth): add Google login
fix(api): resolve 404 error
docs(readme): update install guide
chore: update dependencies
```
---
## 3. Cac Loai Type
### Type chinh (thuong dung)
| Type | Muc dich | Anh huong version | Vi du |
|------|---------|-------------------|-------|
| `feat` | Them tinh nang moi | MINOR (1.x.0) | `feat(auth): add Google OAuth` |
| `fix` | Sua loi | PATCH (1.0.x) | `fix(api): resolve 404 error` |
| `docs` | Cap nhat tai lieu | Khong | `docs(readme): update install guide` |
| `style` | Doi format/UI khong anh huong logic | Khong | `style: apply prettier formatting` |
| `refactor` | Tai cau truc code, khong thay doi chuc nang | Khong | `refactor: simplify UserService logic` |
| `perf` | Toi uu hieu nang | PATCH (1.0.x) | `perf: optimize database queries` |
| `test` | Them hoac sua test | Khong | `test: add unit tests for AuthService` |
| `chore` | Thay doi nho, bao tri, CI/CD | Khong | `chore: update dependencies` |
### Type bo sung (it dung hon)
| Type | Muc dich | Vi du |
|------|---------|-------|
| `build` | Thay doi build system hoac dependencies | `build: upgrade to .NET 8` |
| `ci` | Thay doi CI/CD pipeline | `ci: add GitHub Actions workflow` |
| `revert` | Hoan tac commit truoc do | `revert: revert feat(auth): add Google login` |
---
## 4. Scope - Pham Vi Thay Doi
Scope la phan **tuy chon** nam trong dau ngoac `()`, xac dinh module/file/module cu the bi anh huong.
### Danh sach scope khuyen nghi cho du an Clean Architecture
| Scope | Layer/Module | Vi du |
|-------|-------------|-------|
| `domain` | MyNewProjectName.Domain | `feat(domain): add Order entity` |
| `app` | MyNewProjectName.Application | `feat(app): add CreateUserCommand` |
| `infra` | MyNewProjectName.Infrastructure | `feat(infra): configure EF Core DbContext` |
| `api` | MyNewProjectName.WebAPI | `fix(api): resolve CORS issue` |
| `admin` | MyNewProjectName.AdminAPI | `feat(admin): add dashboard endpoint` |
| `contract` | MyNewProjectName.Contracts | `feat(contract): add UserDto` |
| `test` | MyNewProjectName.UnitTest | `test(test): add UserService tests` |
| `auth` | Module xac thuc | `feat(auth): implement JWT refresh token` |
| `cache` | Module caching/Redis | `feat(cache): add Redis caching layer` |
| `db` | Database/Migration | `feat(db): add migration for User table` |
| `docker` | Docker/Container | `chore(docker): update docker-compose` |
| `deps` | Dependencies/NuGet | `chore(deps): update MediatR to v12` |
### Quy tac scope
- Viet thuong toan bo
- Ngan gon, 1-2 tu
- Phai nhat quan trong toan du an
- Co the bo qua neu thay doi anh huong nhieu module
---
## 5. Quy Tac Viet Description
### Nen lam
| Quy tac | Chi tiet | Vi du |
|---------|---------|-------|
| **Viet hoa chu dau** | Chu dau tien cua description viet hoa | `feat: Add login page` |
| **Duoi 50 ky tu** | Giu description ngan gon | `fix: Resolve null reference in UserService` |
| **Dung dong tu menh lenh** | Bat dau bang dong tu (add, fix, update, remove...) | `feat: Add user authentication` |
| **Khong dau cham cuoi** | Khong ket thuc bang dau `.` | `docs: Update README` |
| **Mo ta "lam gi"** | Tap trung vao ket qua, khong phai qua trinh | `fix: Resolve 404 on login redirect` |
### Khong nen lam
| Quy tac | Vi du sai | Vi du dung |
|---------|----------|-----------|
| **Khong viet chung chung** | `fix: Fix bug` | `fix(auth): Resolve token expiration error` |
| **Khong qua dai** | `feat: Add new user authentication with JWT and refresh token and role-based access control` | `feat(auth): Add JWT authentication` |
| **Khong dung qua khu** | `feat: Added login page` | `feat: Add login page` |
| **Khong ghi ten file** | `fix: Fix UserService.cs` | `fix(app): Resolve null ref in user creation` |
| **Khong dung tieng Viet trong type** | `feat: Them trang dang nhap` | `feat: Add login page` |
### Danh sach dong tu khuyen dung
| Dong tu | Khi nao dung | Vi du |
|---------|-------------|-------|
| `add` | Them moi | `feat: Add payment gateway` |
| `remove` | Xoa bo | `refactor: Remove unused imports` |
| `update` | Cap nhat | `docs: Update API documentation` |
| `fix` | Sua loi | `fix: Fix null reference exception` |
| `resolve` | Giai quyet | `fix: Resolve race condition in checkout` |
| `implement` | Hien thuc | `feat: Implement search filter` |
| `refactor` | Tai cau truc | `refactor: Refactor UserRepository` |
| `optimize` | Toi uu | `perf: Optimize query performance` |
| `configure` | Cau hinh | `chore: Configure Serilog logging` |
| `migrate` | Di chuyen/migration | `feat: Migrate user table schema` |
| `replace` | Thay the | `refactor: Replace raw SQL with EF Core` |
| `rename` | Doi ten | `refactor: Rename UserDto to UserResponse` |
| `move` | Di chuyen | `refactor: Move validators to shared folder` |
| `simplify` | Don gian hoa | `refactor: Simplify error handling logic` |
| `extract` | Tach ra | `refactor: Extract email service interface` |
---
## 6. Commit Message Voi Body Va Footer
Khi commit phuc tap, can giai thich them, su dung body va footer:
### Format
```
<type>(<scope>): <description>
<-- dong trong bat buoc
<body>
<-- dong trong bat buoc
<footer>
```
### Vi du 1: Commit co body
```
feat(auth): Add JWT authentication
Implement JWT-based authentication using IdentityServer.
Include access token and refresh token flow.
Configure token expiration to 15 minutes for access token
and 7 days for refresh token.
```
### Vi du 2: Commit co body va footer (lien ket ticket)
```
fix(api): Resolve 500 error on user creation
The API was returning 500 when creating a user with an existing email.
Added proper validation check before inserting into database.
Return 409 Conflict instead of 500 Internal Server Error.
Resolves: PROJ-1234
```
### Vi du 3: Breaking change
```
feat(api)!: Change response format for all endpoints
BREAKING CHANGE: All API responses now follow the new standard format:
{
"success": true,
"data": {},
"message": "",
"errors": []
}
Previous format with flat response body is no longer supported.
Clients must update to handle the new wrapper format.
Resolves: PROJ-5678
```
### Footer keywords
| Keyword | Muc dich | Vi du |
|---------|---------|-------|
| `Resolves:` | Dong issue/ticket | `Resolves: PROJ-1234` |
| `Closes:` | Dong issue tren GitHub | `Closes: #123` |
| `Related:` | Lien quan den issue khac | `Related: PROJ-5678` |
| `BREAKING CHANGE:` | Thay doi khong tuong thich nguoc | `BREAKING CHANGE: API response format changed` |
| `Co-authored-by:` | Dong tac gia | `Co-authored-by: Name <email>` |
| `Reviewed-by:` | Nguoi review | `Reviewed-by: Name <email>` |
---
## 7. Bang Vi Du Day Du
### feat - Them tinh nang moi
```bash
feat(auth): Add Google OAuth login
feat(api): Add pagination support for product list
feat(domain): Add Order entity with value objects
feat(app): Add CreateUserCommand with validation
feat(infra): Add Redis caching for product queries
feat(admin): Add dashboard statistics endpoint
feat(contract): Add OrderResponseDto
```
### fix - Sua loi
```bash
fix(api): Resolve 404 error on login redirect
fix(auth): Fix token expiration calculation
fix(infra): Resolve database connection timeout
fix(app): Fix null reference in GetUserQuery
fix(domain): Fix value object equality comparison
```
### docs - Tai lieu
```bash
docs(readme): Update installation guide
docs(api): Add Swagger annotations for OrderController
docs: Add contributing guidelines
docs: Update environment variables documentation
```
### style - Format code
```bash
style: Apply EditorConfig formatting rules
style(api): Fix indentation in controllers
style: Remove trailing whitespace
```
### refactor - Tai cau truc
```bash
refactor(app): Simplify UserService error handling
refactor(infra): Extract IEmailService interface
refactor: Move validation logic to domain layer
refactor(api): Replace manual mapping with AutoMapper
```
### perf - Toi uu hieu nang
```bash
perf(infra): Optimize database queries with projection
perf(api): Add response compression middleware
perf(cache): Reduce Redis round trips with pipeline
```
### test - Them/sua test
```bash
test(app): Add unit tests for CreateUserCommand
test(domain): Add tests for Order entity validation
test(infra): Add integration tests for UserRepository
test: Increase code coverage to 80%
```
### chore - Bao tri
```bash
chore: Update NuGet packages
chore(deps): Upgrade to .NET 8
chore(docker): Update docker-compose configuration
chore(ci): Add GitHub Actions build workflow
chore: Update .gitignore
```
### build - Build system
```bash
build: Upgrade to .NET 8 SDK
build: Add Directory.Build.props for shared config
build: Configure multi-stage Docker build
```
### ci - CI/CD
```bash
ci: Add GitHub Actions workflow for PR checks
ci: Configure automatic deployment to staging
ci: Add SonarQube code analysis step
```
---
## 8. Vi Du Thuc Te Trong Du An
### Luong lam viec mot feature hoan chinh
Gia su lam task PROJ-101: Them tinh nang dang nhap
```bash
# 1. Tao branch
git checkout -b feature/PROJ-101-add-login
# 2. Them entity va domain logic
git commit -m "feat(domain): Add User entity with email and password"
# 3. Them command/query
git commit -m "feat(app): Add LoginCommand with FluentValidation"
# 4. Them infrastructure
git commit -m "feat(infra): Implement UserRepository with EF Core"
git commit -m "feat(infra): Add password hashing service"
# 5. Them API endpoint
git commit -m "feat(api): Add AuthController with login endpoint"
# 6. Them test
git commit -m "test(app): Add unit tests for LoginCommand handler"
# 7. Cap nhat tai lieu
git commit -m "docs(api): Add Swagger docs for auth endpoints"
# 8. Push va tao PR
git push origin feature/PROJ-101-add-login
```
### Luong sua loi
```bash
# 1. Tao branch
git checkout -b bugfix/PROJ-202-fix-login-error
# 2. Sua loi
git commit -m "fix(auth): Resolve incorrect password validation logic"
# 3. Them test cho truong hop loi
git commit -m "test(auth): Add test for invalid password scenario"
# 4. Push va tao PR
git push origin bugfix/PROJ-202-fix-login-error
```
### Luong hotfix khan cap
```bash
# 1. Tao branch tu main
git checkout main
git checkout -b hotfix/PROJ-303-fix-sql-injection
# 2. Sua loi
git commit -m "fix(infra): Sanitize SQL parameters to prevent injection
The raw SQL query in SearchRepository was concatenating user input
directly into the query string. Replaced with parameterized query
using EF Core's FromSqlInterpolated method.
Resolves: PROJ-303"
# 3. Push va tao PR vao main
git push origin hotfix/PROJ-303-fix-sql-injection
```
---
## 9. Nhung Loi Thuong Gap
| # | Loi sai | Vi du sai | Vi du dung |
|---|--------|----------|-----------|
| 1 | **Message qua chung chung** | `fix: Fix bug` | `fix(auth): Resolve token expiration error` |
| 2 | **Khong co type** | `Add login page` | `feat: Add login page` |
| 3 | **Dung qua khu** | `feat: Added new feature` | `feat: Add new feature` |
| 4 | **Qua nhieu thay doi trong 1 commit** | `feat: Add login, register, forgot password` | Tach thanh 3 commit rieng |
| 5 | **Commit file khong lien quan** | Commit ca file config lan feature | Chi commit file lien quan |
| 6 | **Message tieng Viet** | `feat: Them trang dang nhap` | `feat: Add login page` |
| 7 | **Dau cham cuoi** | `feat: Add login page.` | `feat: Add login page` |
| 8 | **Khong co scope khi can thiet** | `fix: Fix null reference` | `fix(app): Resolve null ref in GetUserQuery` |
| 9 | **Type sai** | `feat: Fix bug` | `fix: Resolve login error` |
| 10 | **Description qua dai** | 100+ ky tu tren 1 dong | Giu duoi 50 ky tu, dung body cho chi tiet |
---
## 10. Checklist Truoc Khi Commit
- [ ] Commit message co dung format `<type>(<scope>): <description>` khong?
- [ ] Type co chinh xac khong? (feat, fix, docs, style, refactor, perf, test, chore)
- [ ] Scope co phan anh dung module bi anh huong khong?
- [ ] Description co duoi 50 ky tu khong?
- [ ] Description co bat dau bang dong tu menh lenh khong? (add, fix, update...)
- [ ] Description co viet hoa chu dau khong?
- [ ] Khong co dau cham cuoi trong description?
- [ ] Moi commit chi chua 1 thay doi logic duy nhat?
- [ ] Commit co lien ket ticket ID khong? (trong scope hoac footer)
- [ ] Neu la breaking change, da danh dau `!` va them `BREAKING CHANGE:` trong footer?
---
## Tom Tat Nhanh
```
Format: <type>(<scope>): <description>
Type: feat | fix | docs | style | refactor | perf | test | chore | build | ci | revert
Scope: domain | app | infra | api | admin | contract | test | auth | cache | db | docker | deps
Vi du:
feat(auth): Add Google OAuth login # scope = "auth" (module authentication)
fix(api): Resolve 404 error # scope = "api" (API endpoints)
docs(readme): Update install guide # scope = "readme" (file/module cu the)
feat: Them tinh nang moi (VD: feat(login): Add Google OAuth).
fix: Sua loi (VD: fix(api): Resolve 404 error).
docs: Cap nhat tai lieu.
style: Doi format/UI khong anh huong logic.
refactor: Tai cau truc code.
perf: Toi uu hieu nang.
chore: Thay doi nho (VD: chore: Update dependencies).
Quy tac:
- Type va scope viet thuong
- Description viet hoa chu dau, duoi 50 ky tu
- Dung dong tu menh lenh (add, fix, update, remove, implement...)
- Khong dau cham cuoi
- 1 commit = 1 thay doi logic
- Lien ket ticket ID khi co the
```