npm package: @gustavovalle23/churros
Description: A Clean Architecture & DDD Framework using Fastify + TypeScript
Author: Gustavo Valle
Latest version: 0.0.1

### **Features of the DDD + Clean Architecture Framework**
This **Fastify + TypeScript** framework will be designed to **abstract layers** and **focus on domain logic**, inspired by **Herbs.js** but with better **CQRS, event-driven support, and DI**.

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## **1. Core Architectural Features**
- 🏛 **Layered Architecture** (Domain, Application, Interface, Infrastructure)
- ✅ **Strictly Enforces DDD Principles**
- 🏗 **Scaffolded Project Structure**
- ⚡ **Fastify Integration for High-Performance APIs**
- 🛠 **Pluggable ORM (Prisma, TypeORM, MikroORM, etc.)**
- 🧩 **Flexible Dependency Injection System**
- ⚙️ **Automatic Repository & Use Case Registration**
- 📦 **Supports Microservices & Monoliths**

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## **2. Domain-Centric Features**
- 📌 **Entity & Value Object Abstraction**
- 🔗 **Aggregate Root Pattern**
- 🗂 **Repository Pattern (Persistence Abstraction)**
- ⚡ **Domain-Driven Services**
- 🔄 **Automatic Business Rule Validation**
- 🔥 **Event-Driven Architecture (Domain Events)**
- 🛑 **Invariants & Business Rule Enforcement**
- 🛡 **Unit of Work Pattern for Transactional Consistency**
- ⏳ **Lazy-Loaded and Cached Aggregates**
- ⚠️ **Domain Exception Handling**

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## **3. Application Layer Features (Use Cases & CQRS)**
- 🎯 **Use Case Abstraction (Command & Query Pattern)**
- 🏹 **Command Bus & Query Bus**
- 💡 **CQRS Support (Separate Read & Write Models)**
- 🏗 **Use Case Middleware (Logging, Caching, etc.)**
- 🔌 **Plug-and-Play Dependency Injection**
- 🏷 **DTO (Data Transfer Object) Validation**
- ⚡ **Event Sourcing Ready**
- 🏭 **Factory Methods for Use Cases**
- ✅ **Middleware Hooks for Pre/Post Execution Logic**

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## **4. API & Interface Layer Features**
- 🚀 **Automatic Route Mapping for Use Cases**
- 📌 **Decorator-Based Controller Definitions**
- 🏗 **GraphQL & REST API Support**
- 🌍 **Multi-Protocol Support (WebSockets, gRPC, etc.)**
- 🔧 **Automatic Request Validation**
- 📑 **Auto-Generated Swagger / OpenAPI Docs**
- ⚙️ **Error Handling Middleware**
- 🔄 **API Versioning Support**
- 🧩 **Flexible Authentication & Authorization (JWT, OAuth, RBAC)**
- 🎭 **Multi-Tenant API Support**
- 📝 **Logging & Monitoring Middleware**
- ⚡ **Hot Reload for Fast Development**

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## **5. Infrastructure & ORM Features**
- 🗄 **Repository Implementations for Multiple ORMs**
- 🔄 **Unit of Work for Transaction Handling**
- 🔌 **Database Adapter for Prisma, TypeORM, Sequelize, etc.**
- 📦 **Automatic Dependency Injection for Repositories**
- 🌿 **Soft Deletes & Auditing Support**
- 🚀 **Optimized Query Performance (Caching, Indexing)**
- 🛠 **Background Jobs & Worker Support**
- 🗂 **Automatic Schema Migration & Seeding**

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## **6. Event-Driven & Messaging Features**
- 📡 **Domain Events Out-of-the-Box**
- 🔥 **Event Bus for In-App Event Dispatching**
- 🔄 **Synchronous & Asynchronous Event Handlers**
- 🕵️ **Saga Pattern for Long-Running Workflows**
- 📊 **Message Queue Integrations (Kafka, RabbitMQ, NATS, Redis)**
- ⚡ **Outbox Pattern Support**
- 🛠 **Event Store for Persisting Domain Events**
- 🔗 **Webhook Support for External Events**
- 💾 **Snapshot & Replay Mechanism for Event Sourcing**
- 📣 **Pub/Sub Pattern Support**

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## **7. Dependency Injection & Config Management**
- 🏗 **Built-in Dependency Injection System**
- 🔄 **Automatic Dependency Resolution**
- ⚙️ **Customizable Dependency Scopes**
- 🔌 **Supports Third-Party IoC Containers (tsyringe, InversifyJS)**
- 🔥 **Environment-Based Configurations**
- 🏗 **Hierarchical Configuration Loading**
- 📊 **Centralized Logging & Monitoring**
- 🛑 **Graceful Shutdown & Cleanup Handlers**
- 🚀 **Performance Optimizations via Lazy-Loading**

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## **8. DevTools & CLI Features**
- 🔥 **CLI for Bootstrapping New Projects**
- 📜 **Code Generators (Entities, Repositories, Use Cases, Controllers)**
- 🛠 **Auto-Scaffold Folder Structures**
- 🔄 **Live Reload for Development**
- 🔧 **Automated Unit & Integration Test Scaffolding**
- 🔍 **Tracing & Profiling Tools**
- 🔬 **Performance Benchmarking Utilities**
- 📊 **Real-Time Metrics Dashboard**
- 📦 **Plugin System for Extensibility**
- ⚡ **Hot Module Replacement (HMR)**

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## **9. Security & Best Practices**
- 🔑 **Automatic API Key & JWT Handling**
- 🔒 **Role-Based & Attribute-Based Access Control (RBAC/ABAC)**
- 🚀 **Secure Headers & Middleware Protection**
- 🛡 **Request Rate Limiting & DDoS Protection**
- 🏗 **CSRF & CORS Support**
- 🛠 **Input Validation & Data Sanitization**
- 📜 **Audit Logging for Security Events**
- 🔎 **Secrets & Config Management**
- 🔥 **Automatic Data Encryption & Hashing**

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## **10. Testing & Quality Assurance**
- 🏗 **Built-in Test Suite (Unit, Integration, E2E)**
- 🛠 **Mocking & Dependency Injection for Tests**
- 🔄 **Automatic Test Fixtures & Seed Data**
- ⚡ **Fuzz Testing & Load Testing Support**
- 📊 **Code Coverage & Linting**
- 🎯 **BDD & TDD Ready**
- 🚀 **Mutation Testing**
- 📝 **Snapshot Testing for APIs**
- 🔌 **Pluggable Test Runners (Jest, Mocha, Vitest)**

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### **Summary: Why This Framework?**
✅ **Strict DDD and Clean Architecture**  
✅ **Zero Boilerplate, High Productivity**  
✅ **Automatic API & Repository Wiring**  
✅ **Event-Driven, Microservice-Ready**  
✅ **Flexible ORM & DI Support**  
✅ **CLI & Code Generators for Speed**  
✅ **Security & Performance Optimized**  

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## **🗂️ Project Breakdown & Timeline Overview**
### **🔹 Phase 1: Planning & Architecture Design (Weeks 1-3)**
- Define the **core architecture** (Domain, Application, Infrastructure, Interface layers).
- Decide on **key design patterns** (CQRS, Event Bus, Dependency Injection).
- Select **dependencies & libraries** (Fastify, Prisma, tsyringe, Kafka, etc.).
- Draft an **initial project specification & RFC**.

### **🔹 Phase 2: Core Framework Development (Weeks 4-12)**
- Implement **Domain Model Abstractions** (Entities, Aggregates, Repositories).
- Build **Use Case Management & Command Bus**.
- Implement **Fastify API Layer** with automatic routing.
- Create **Infrastructure Layer** (ORM & Event Bus).
- Develop **CLI Tooling** for scaffolding projects.

### **🔹 Phase 3: Advanced Features & Enhancements (Weeks 13-22)**
- Add **CQRS Read/Write Separation**.
- Implement **Event Sourcing & Outbox Pattern**.
- Integrate **GraphQL & WebSockets**.
- Add **Security Enhancements** (RBAC, JWT, OAuth).
- Implement **Testing & Quality Assurance**.

### **🔹 Phase 4: Optimization, Documentation & Release (Weeks 23-28)**
- **Performance Tuning** & Benchmarking.
- **Comprehensive Documentation & Examples**.
- **Beta Testing & Developer Feedback**.
- **First Public Release (v1.0.0)**.

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## **📅 Gantt-Style Development Timeline**

### **🟢 Phase 1: Planning & Architecture (Weeks 1-3)**
| Task | Start | Duration | Status |
|------|------|---------|--------|
| Define architecture & design patterns | Week 1 | 1 week | 🔄 In Progress |
| Select core dependencies | Week 1 | 1 week | ✅ Completed |
| Draft RFC & Project Specification | Week 2 | 1 week | 🔄 In Progress |
| Create initial GitHub repository & project setup | Week 3 | 1 week | ⏳ Pending |

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### **🟡 Phase 2: Core Framework Development (Weeks 4-12)**
| Task | Start | Duration | Status |
|------|------|---------|--------|
| Implement **Entity & Value Object Abstractions** | Week 4 | 2 weeks | ⏳ Pending |
| Implement **Repository Pattern** | Week 6 | 2 weeks | ⏳ Pending |
| Develop **Aggregate Root & Unit of Work** | Week 8 | 2 weeks | ⏳ Pending |
| Implement **Use Case & Command Bus** | Week 10 | 2 weeks | ⏳ Pending |
| Build **Fastify API Layer with Auto-Routing** | Week 11 | 1 week | ⏳ Pending |
| Implement **Infrastructure Layer (ORM Adapter, Kafka, etc.)** | Week 12 | 1 week | ⏳ Pending |
| Develop **CLI for Code Generation** | Week 12 | 1 week | ⏳ Pending |

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### **🟠 Phase 3: Advanced Features (Weeks 13-22)**
| Task | Start | Duration | Status |
|------|------|---------|--------|
| Add **CQRS Read/Write Separation** | Week 13 | 3 weeks | ⏳ Pending |
| Implement **Event Bus & Domain Events** | Week 16 | 2 weeks | ⏳ Pending |
| Implement **Event Sourcing & Outbox Pattern** | Week 18 | 2 weeks | ⏳ Pending |
| Integrate **GraphQL & WebSockets** | Week 20 | 2 weeks | ⏳ Pending |
| Add **Security Features (JWT, OAuth, RBAC)** | Week 22 | 2 weeks | ⏳ Pending |

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### **🔵 Phase 4: Optimization & Release (Weeks 23-28)**
| Task | Start | Duration | Status |
|------|------|---------|--------|
| Performance Optimization & Benchmarking | Week 23 | 2 weeks | ⏳ Pending |
| Write Full Documentation & API Reference | Week 24 | 2 weeks | ⏳ Pending |
| Conduct Beta Testing & Gather Feedback | Week 26 | 1 week | ⏳ Pending |
| First Public Release (v1.0.0) 🚀 | Week 28 | 🚀 | ⏳ Pending |

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## **🛠️ Detailed Task Breakdown**
### **🔹 Domain Layer Development (Weeks 4-8)**
- Implement **base classes for Entities, Value Objects, Aggregates**.
- Implement **Repository Interface** (Generic & Concrete).
- Implement **Domain Services** & Business Rules.
- Implement **Unit of Work & Transaction Management**.

### **🔹 Application Layer Development (Weeks 8-12)**
- Implement **Use Case Abstraction** (Command & Query).
- Implement **Command Bus & Query Bus**.
- Implement **Automatic Dependency Injection (tsyringe/InversifyJS)**.

### **🔹 Infrastructure & API Development (Weeks 12-18)**
- Implement **ORM Adapter Layer (Prisma, TypeORM, MikroORM)**.
- Implement **Fastify API Layer (Decorator-based Controllers)**.
- Implement **Event Bus & Pub/Sub Integration**.
- Implement **Outbox Pattern for Event Persistence**.

### **🔹 DevTools & CLI (Weeks 12-16)**
- Create **CLI Tool for Code Scaffolding**.
- Implement **Auto-Generate Command for Entities, Repositories, Use Cases**.
- Implement **Automatic Fastify Route Registration**.

### **🔹 Security & Middleware (Weeks 18-22)**
- Implement **RBAC & OAuth Authorization**.
- Implement **JWT Authentication Middleware**.
- Implement **Request Validation & Data Sanitization**.

### **🔹 Optimization & Testing (Weeks 23-28)**
- Write **Unit & Integration Tests**.
- Implement **Mutation Testing & Fuzz Testing**.
- Run **Load & Performance Benchmarks**.
- Conduct **Beta Testing with Developers**.

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## **📊 Key Milestones**
| Milestone | Estimated Completion | Status |
|-----------|---------------------|--------|
| **Core Domain Layer Ready** | Week 8 | ⏳ Pending |
| **Fastify API Layer Functional** | Week 12 | ⏳ Pending |
| **CQRS & Event Sourcing Implemented** | Week 20 | ⏳ Pending |
| **Security & Performance Optimized** | Week 24 | ⏳ Pending |
| **Beta Release (v0.9.0)** | Week 26 | ⏳ Pending |
| **Public Release (v1.0.0)** | Week 28 | 🚀 Pending |

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## **🛠️ Tools & Technologies Used**
| Category | Tools |
|----------|-------|
| **Language** | TypeScript |
| **Framework** | Fastify |
| **ORMs** | Prisma, TypeORM, MikroORM |
| **Dependency Injection** | tsyringe, InversifyJS |
| **Message Brokers** | Kafka, RabbitMQ, NATS |
| **Authentication** | JWT, OAuth, RBAC |
| **Testing** | Jest, Vitest, Supertest |
| **DevOps** | Docker, Kubernetes, Terraform |
| **CI/CD** | GitHub Actions, CircleCI |

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