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{
"current_task_id": "cc950f11-e535-41db-85b2-246d501d8a6e",
"completed_tasks": [],
"agent_sequence_index": 0,
"debug_attempts": 0,
"current_agent": "io8project_builder",
"progress_percentage": 0.0,
"context": {
"uploaded_files": [],
"project_path": "/tmp/bmad_output/messaging_app_20251010_040350",
"io8_project_path": "/tmp/bmad_output/messaging_app_20251010_040350/.io8project",
"agent_sequence": [
"io8project_builder",
"io8directory_structure",
"io8codermaster",
"io8analyst",
"io8architect",
"io8pm",
"io8sm",
"io8developer",
"io8devops"
],
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"agent_temperatures": [
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"agent_clis": [
"gemini",
"surecli",
"surecli",
"surecli",
"surecli",
"surecli",
"gemini",
"gemini",
"gemini"
]
}
}

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{"project": "metadata"}

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# Project Directory Structure for 'messaging app'
This document outlines the standard directory structure for the 'messaging app' project, adhering to the io8Directory Structure Principles. This structure is designed to organize project files, separate codebases, manage agent outputs, and streamline deployment within a base project environment.
**Project Root: `./` (Current Directory after cloning the base project)**
The project root (`./`) serves as the base for all project files and directories. When the base project is cloned, this directory becomes the working directory. The existing `.sureai/` folder from the cloned project is recognized and integrated into this structure.
## Core Directories and Files:
```
./
├── .io8project/ # io8 Project Metadata and State Management
│ ├── .state.json # Persistent task state for agents
│ └── project_metadata.json # Project-specific metadata
├── .sureai/ # Agent Outputs, Documents, and Uploads (already existing from cloned project)
│ ├── uploads/ # Directory for uploaded documents and images (e.g., for requirement builder agent)
│ ├── .directory_structure_messaging_app_messaging_app_20251010_040350.md # This document, detailing the structure
│ ├── .bmad_agent_messaging_app_20251010_040350.md # Hidden outputs from BMAD agent for this project
│ ├── .analyst_agent_messaging_app_20251010_040350.md # Hidden outputs from Analyst agent for this project
│ ├── .architect_agent_messaging_app_20251010_040350.md # Hidden outputs from Architect agent for this project
│ ├── .pm_agent_messaging_app_20251010_040350.md # Hidden outputs from PM agent for this project
│ ├── .sm_agent_messaging_app_20251010_040350.md # Hidden outputs from Scrum Master agent for this project
│ ├── .developer_agent_messaging_app_20251010_040350.md # Hidden outputs from Developer agent for this project
│ ├── .devops_agent_messaging_app_20251010_040350.md # Hidden outputs from DevOps agent for this project
│ ├── .bmad_*.md # General hidden BMAD agent outputs (e.g., older runs)
│ ├── .analyst_*.md # General hidden Analyst agent outputs
│ ├── .architect_*.md # General hidden Architect agent outputs
│ ├── .developer_*.md # General hidden Developer agent outputs
│ ├── .devops_*.md # General hidden DevOps agent outputs
│ ├── .pm_*.md # General hidden PM agent outputs
│ ├── analysis_document.md # Visible document for analysis details (created by Analyst agent)
│ ├── requirements_document.md # Visible document for project requirements (created by Analyst agent)
│ ├── architecture_document.md # Visible document for architecture design (created by Architect agent)
│ ├── tech_stack_document.md # Visible document for technology stack (created by Architect agent)
│ ├── prd_document.md # Visible document for Product Requirements Document (created by PM agent)
│ ├── project_plan.md # Visible document for project plan (created by PM agent)
│ ├── tasks_list.md # Visible document for project tasks (created by SM agent, updated by Developer)
│ └── sprint_plan.md # Visible document for sprint plans (created by SM agent)
├── backend/ # Contains all backend code and related files for the messaging app.
│ └── # e.g., src/, app/, config/, tests/ for backend services
├── frontend/ # Contains all frontend code and related assets for the messaging app.
│ └── # e.g., src/, public/, components/, pages/ for web/mobile UI
├── deployment_config.yml # Root-level configuration for deployment settings (to be created by DevOps agent)
├── Dockerfile.backend # Dockerfile specific to building the backend service (to be created by DevOps agent)
├── Dockerfile.frontend # Dockerfile specific to building the frontend service (to be created by DevOps agent)
└── docker-compose.yml # Docker Compose file for multi-container application setup (to be created by DevOps agent)
```
## Directory Details:
### `.io8project/`
This hidden directory (`.io8project/`) holds internal project metadata and state information crucial for the io8 agents. It is created at the root level alongside the cloned project's content.
- `.state.json`: Manages the current state and progress of tasks within the workflow.
- `project_metadata.json`: Stores general project information, configuration, and settings.
### `.sureai/`
This hidden directory (`.sureai/`) acts as the central hub for all agent-generated documentation, outputs, and uploaded assets. It is expected to already exist within the cloned base project.
- `uploads/`: A dedicated subdirectory for assets uploaded by users or other agents, such as diagrams, mockups, or reference documents that inform requirements.
- **Hidden Agent Output Files (`.bmad_*.md`, `.analyst_*.md`, etc.)**: These files, prefixed with a dot, contain intermediate outputs, logs, or detailed workings from individual agents. They are not intended for direct user consumption but serve as internal records. This includes this directory structure document itself.
- **Visible Documents (`analysis_document.md`, `requirements_document.md`, etc.)**: These Markdown files contain structured documentation generated by specific agents (e.g., Analyst, Architect, PM, SM). They are intended for human readability and collaboration. These will be appended by their respective agents as the project progresses.
### `backend/`
This directory is designated for all server-side logic and components of the messaging application. It will contain:
- API endpoints for sending/receiving messages.
- User authentication and authorization services.
- Database interaction logic for storing messages, user data, etc.
- Real-time communication services (e.g., WebSockets for live chat).
This directory will be created and populated by the Developer agent if not already present in the base project.
### `frontend/`
This directory is for the client-side code and assets of the messaging application, which will provide the user interface. It will contain:
- User interface components for chat rooms, message lists, input fields.
- Logic for displaying messages, user presence, notifications.
- Client-side routing and state management.
- Integration with backend APIs for real-time updates.
This directory will be created and populated by the Developer agent if not already present in the base project.
### Root Level Configuration Files:
These files are placed at the project root for easy access and management of the overall application environment. They will be created by the DevOps agent.
- `deployment_config.yml`: High-level configuration for deployment environments (e.g., staging, production).
- `Dockerfile.backend`: Defines how to build the backend Docker image.
- `Dockerfile.frontend`: Defines how to build the frontend Docker image.
- `docker-compose.yml`: Orchestrates the multi-container messaging application, defining services like the backend, frontend, database, and potentially other services like Nginx or a message broker.
This structured approach ensures clarity, maintainability, and efficient collaboration throughout the development lifecycle of the 'messaging app'.

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# io8 System Architect Agent - Customized for This Project
## Project-Specific Instructions
# Architecture Document Update: Messaging App
Generated: 2025-10-10T[timestamp]
## System Overview
The Messaging App extends the existing Angular Clarity Boilerplate frontend with a new, dedicated backend. The architecture is a **Client-Server model** with a robust **Real-time Communication Layer**. The Angular frontend provides the user interface for authentication, user management, and interactive chat. The backend, composed of several specialized services, handles business logic, data persistence, and real-time message exchange via WebSockets. This separation ensures scalability, maintainability, and allows independent evolution of frontend and backend components. The system prioritizes low-latency message delivery, secure communication, and horizontal scalability to accommodate a growing user base, as derived from `analysis_document.md` and `requirements_document.md`.
## Architecture Pattern
The core architecture pattern for the Messaging App is a **Hybrid Client-Server / Layered Architecture** with a strong emphasis on a **Publish-Subscribe (Pub/Sub) pattern** for real-time messaging:
1. **Client-Server:** The Angular frontend acts as the client, communicating with the backend API servers.
2. **Layered Backend:** The backend is designed with distinct layers:
* **Presentation/API Gateway:** Handles incoming HTTP/WebSocket requests, routing, and potentially authentication pre-checks.
* **Application Services:** Implements core business logic for user management, conversations, and messages.
* **Real-time Communication Layer:** Dedicated WebSocket server(s) manage persistent connections and message broadcasting.
* **Data Access Layer:** Interfaces with the database for CRUD operations.
3. **Publish-Subscribe (for Real-time):** A message broker (e.g., Redis Pub/Sub) will be used to facilitate real-time message exchange between backend services (e.g., a message service publishing new messages, and multiple WebSocket servers subscribing to these messages to fan-out to connected clients). This pattern is crucial for horizontal scaling of WebSocket servers, addressing NFR-003 (Scalability) from `requirements_document.md`.
## Component Design
The system is composed of the following key components, aligning with `analysis_document.md`'s architectural components and `requirements_document.md`'s data and interface requirements:
### 1. Frontend (Angular Clarity Application)
* **Purpose:** User interface for interaction, leveraging the existing Angular Clarity boilerplate.
* **Modules:**
* `AuthModule`: Handles user registration, login, and session management (communicates with Backend Auth Service).
* `UserModule`: Manages user profiles, search, and presence display (communicates with Backend User Service).
* `ChatModule`: Core messaging functionality, including conversation list, chat window, message input, and real-time message display. (Communicates with Backend Conversation, Message, and WebSocket Services).
* `CoreModule` & `SharedModule`: As per boilerplate, for singleton services (e.g., HTTP interceptors, WebSocket client) and reusable UI components.
* **Key Features:** Responsive UI (NFR-007), Real-time message rendering, User presence display.
### 2. Backend Services
Designed as a set of loosely coupled services, potentially evolving into microservices, to manage core functionalities.
* **2.1. Authentication Service (REST API):**
* **Purpose:** Manages user authentication and authorization (FR-001, FR-002, NFR-003, NFR-004).
* **Responsibilities:** User registration, login, JWT token issuance, validation, and refresh. Password hashing.
* **Interaction:** Exposes REST endpoints (`POST /api/auth/register`, `POST /api/auth/login`) as per `requirements_document.md`.
* **2.2. User Service (REST API):**
* **Purpose:** Manages user profiles and provides user search capabilities (FR-003, FR-005).
* **Responsibilities:** Store and retrieve user profile information, handle profile updates, provide search functionality for other users.
* **Interaction:** Exposes REST endpoints (`GET /api/users/me`, `PUT /api/users/me`, `GET /api/users/search`).
* **2.3. Conversation Service (REST API):**
* **Purpose:** Manages the creation and retrieval of 1:1 and group conversations (FR-009).
* **Responsibilities:** Create new conversations, manage participants (FR-010), retrieve lists of conversations a user is part of.
* **Interaction:** Exposes REST endpoints (`GET /api/conversations`, `POST /api/conversations/one-to-one`, `POST /api/conversations/group`).
* **2.4. Message Service (Internal & REST API):**
* **Purpose:** Persists messages and retrieves chat history (FR-008).
* **Responsibilities:** Store incoming messages from the WebSocket Service, retrieve paginated message history for conversations.
* **Interaction:** Exposes REST endpoint (`GET /api/conversations/{id}/messages`) for history, and an internal API for the WebSocket Service to persist new messages.
* **2.5. Real-time WebSocket Service:**
* **Purpose:** Manages persistent WebSocket connections, handles real-time message delivery, and user presence updates (FR-006, FR-007, FR-009, NFR-001, NFR-007).
* **Responsibilities:** Authenticate WebSocket connections using JWT, receive messages from clients, persist them via Message Service, broadcast messages to relevant recipients, manage user online/offline status, propagate status updates via Redis Pub/Sub.
* **Interaction:** Exposes a WSS endpoint (`wss://api.yourdomain.com/ws/chat`), integrates with Redis for Pub/Sub and presence, and with Message Service for persistence.
### 3. Database
* **Purpose:** Persistent storage for all application data, adhering to `requirements_document.md`'s Data Requirements.
* **Key Entities:** `User`, `Conversation`, `ConversationParticipant`, `Message` (as defined in `requirements_document.md`).
* **Relationships:** One-to-many and many-to-many relationships modeled for users, conversations, and messages.
### 4. Caching / Message Broker (Redis)
* **Purpose:** Enhances real-time performance, manages presence, and facilitates inter-service communication for WebSockets.
* **Responsibilities:** Store user presence status (online/offline), act as a Pub/Sub broker for real-time message distribution across multiple WebSocket service instances, potentially caching frequently accessed data (e.g., user profiles).
### 5. Object Storage (e.g., AWS S3 - for Phase 2 Media Sharing)
* **Purpose:** Store media files (images, documents) for sharing (FR-017, FR-018).
* **Responsibilities:** Provides scalable and secure storage for user-uploaded content. The Message Service will store references (URLs) to these objects.
## Data Flow
1. **User Authentication & Profile Management:**
* Frontend (Angular) sends `POST /api/auth/register` or `POST /api/auth/login` to Backend Auth Service.
* Auth Service interacts with Database to create/verify user credentials. Issues JWT.
* Frontend uses JWT for subsequent requests to Backend User Service (e.g., `GET /api/users/me`, `PUT /api/users/me`), which then interacts with Database.
2. **Real-time Messaging (1:1 & Group Chat):**
* After authentication, Frontend (Angular) establishes a secure WebSocket connection (`wss://api.yourdomain.com/ws/chat`) to the Backend WebSocket Service, providing JWT for authorization.
* **Sending a Message:** Frontend sends `send_message` event over WebSocket to Backend WebSocket Service. WebSocket Service persists message via Message Service (to Database). WebSocket Service then publishes the new message to a Redis Pub/Sub channel.
* **Receiving a Message:** Other instances of Backend WebSocket Service (subscribed to Redis Pub/Sub) receive the published message. They identify relevant connected clients and fan out the `new_message` event over their respective WebSockets to the recipients' Frontends.
* **Message History:** Frontend retrieves older messages via `GET /api/conversations/{id}/messages` from Backend Message Service (REST API), which queries the Database.
3. **User Presence:**
* Frontend sends `user_online`/`user_offline` events (or inferred from WebSocket connection status) to Backend WebSocket Service.
* WebSocket Service updates user status in Redis (for fast retrieval across instances) and potentially Database.
* Status changes are published via Redis Pub/Sub to inform other connected users.
## API Design
As detailed in `requirements_document.md` (Interface Requirements):
* **RESTful API:** For stateless operations such as user registration, login, profile management, and fetching historical data (user lists, chat history).
* Endpoints like `/api/auth/register`, `/api/auth/login`, `/api/users/me`, `/api/conversations`, `/api/conversations/{id}/messages` will be implemented.
* Communication will be JSON over HTTPS.
* **WebSocket API:** For real-time, bidirectional communication.
* A single `wss://api.yourdomain.com/ws/chat` endpoint will be used.
* Events like `send_message`, `new_message`, `user_status_update`, `typing_indicator` will be exchanged.
* Payloads will be JSON.
## Security Architecture
Addressing NFR-002 (Security) from `requirements_document.md`:
* **Authentication:**
* **JWT (JSON Web Tokens):** Used for authenticating REST API requests and authorizing WebSocket connections. Tokens will have short lifespans with a refresh token mechanism.
* **Password Hashing:** User passwords will be hashed and salted using strong, industry-standard algorithms (e.g., bcrypt) before storage in the database.
* **Authorization:**
* **Role-Based Access Control (RBAC):** Implemented at the backend for sensitive actions (e.g., group administration (FR-011), accessing message history (NFR-004)).
* **Scope-Based Authorization:** JWTs will contain claims to define the scope of a user's access.
* **Data Encryption:**
* **In-transit:** All HTTP and WebSocket communication will be encrypted using **TLS/SSL (HTTPS/WSS)** (NFR-005).
* **At-rest:** Database encryption and secure storage practices will be applied, especially for media files (if applicable, using encrypted storage services).
* **Input Validation:** Comprehensive input validation will be implemented on all backend API endpoints to prevent common vulnerabilities such as XSS, SQL injection, and buffer overflows (NFR-002).
* **Session Management:** Secure session management for JWTs, including proper storage (e.g., HttpOnly cookies) and invalidation on logout.
## Scalability Considerations
Addressing NFR-003 (Scalability) from `requirements_document.md`:
* **Horizontal Scaling:**
* **Stateless Services:** Backend API services will be designed as stateless entities, allowing them to be horizontally scaled by adding more instances behind a load balancer.
* **WebSocket Service Scaling:** Multiple instances of the WebSocket Service can run concurrently. Redis Pub/Sub acts as a backbone to distribute messages across these instances, ensuring all clients receive messages regardless of which WebSocket server they are connected to.
* **Load Balancing:** A load balancer (e.g., Nginx, or cloud-native solutions) will distribute incoming HTTP and WebSocket traffic across multiple backend service instances.
* **Database Scalability:**
* **Read Replicas:** PostgreSQL can be configured with read replicas to offload read-heavy operations (e.g., fetching chat history) from the primary database instance.
* **Connection Pooling:** Efficient database connection pooling will be used by backend services to manage database load.
* **Sharding (Future):** For extremely high message volumes, message data might be sharded across multiple database instances based on conversation ID or user ID.
* **Caching:** Redis will be used for caching frequently accessed data (e.g., user profiles, online status) to reduce database load and improve response times.
* **Asynchronous Processing:** Backend operations, especially for media sharing (Phase 2), will leverage asynchronous processing to avoid blocking the main request/response cycle, potentially using background task queues (e.g., Celery with Redis).
# Technology Stack Document Update: Messaging App
Generated: 2025-10-10T[timestamp]
## Frontend Technologies
- **Framework:** Angular (v12+), leveraging the existing Angular Clarity Boilerplate structure and tools.
- **Styling:** VMware Clarity Design System (CSS components and styles).
- **State Management:** RxJS for reactive programming and managing application state, Angular Services for shared data logic. Potentially NgRx for more complex global state management in later phases if needed.
- **Real-time Client:** Native WebSocket API through Angular services, potentially using `ngx-web-socket` or a similar wrapper for streamlined integration.
## Backend Technologies
- **Language:** Python 3.9+ (Chosen for its robust ecosystem, excellent asynchronous capabilities, and developer productivity, making it suitable for a real-time application).
- **Framework:** FastAPI (High-performance web framework for building APIs with Python 3.7+ based on standard Python type hints. Ideal for RESTful APIs and seamless integration with WebSockets due to its ASGI nature).
- **API:**
- **RESTful API:** Implemented with FastAPI for authentication, user management, and historical data retrieval.
- **WebSocket API:** Implemented using FastAPI's built-in Starlette WebSocket capabilities for real-time messaging and presence.
- **ORM/Database Client:** SQLAlchemy with Alembic for migrations (for PostgreSQL interaction, offering robust ORM capabilities and database schema management).
- **Password Hashing:** `bcrypt` library.
- **JWT Handling:** `python-jose` or `PyJWT` for token generation and validation.
## Database Technologies
- **Primary Database:** PostgreSQL (Chosen for its reliability, advanced features like JSONB, robust transaction support, and strong scalability for relational data. Suitable for storing user, conversation, and message data).
- **Caching/Message Broker:** Redis (Used for storing user presence data, serving as a Pub/Sub message broker for real-time event distribution across WebSocket instances, and for general-purpose caching).
## Infrastructure
- **Deployment:**
- **Containerization:** Docker (All frontend and backend services will be containerized).
- **Orchestration (Local/Dev):** Docker Compose (For defining and running multi-container Docker applications for local development and staging environments).
- **Orchestration (Production):** Kubernetes or AWS ECS/Fargate (Future consideration for highly scalable and resilient production deployments, allowing for horizontal scaling of backend and WebSocket services).
- **Hosting:** Cloud-agnostic design, with potential deployment on AWS, Azure, or GCP. For media storage (Phase 2), cloud-native object storage like AWS S3 or Google Cloud Storage will be utilized.
- **Reverse Proxy/Load Balancer:** Nginx (To serve the Angular frontend, proxy API requests to backend services, and manage WebSocket connections, handling SSL termination).
## Development Tools
- **Version Control:** Git (GitHub/GitLab/Bitbucket for repository hosting).
- **Testing:**
- **Frontend:** Jest / Karma & Jasmine (For Angular unit and integration tests).
- **Backend:** Pytest (For Python backend unit, integration, and API tests).
- **CI/CD:** GitHub Actions / GitLab CI / Jenkins (To automate testing, building, and deployment pipelines).
- **Code Quality:** Prettier, ESLint (Frontend); Black, Flake8 (Backend) for code formatting and linting.
- **API Documentation:** FastAPI's automatic OpenAPI (Swagger UI/ReDoc) generation for backend API documentation.
## Base Agent Prompt Reference
This agent is based on the standard io8architect agent with project-specific customizations above.
Refer to the base io8architect agent prompt for general principles and workflow instructions.

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# io8 Code Master Agent - Customized for This Project
## Project-Specific Instructions
## PROJECT BREAKDOWN - Messaging App (io8codermaster) - 2025-10-10 04:04:00
**Project Title:** Messaging App
**User Prompt:** `messaging app`
### 1. Project Overview
Develop a real-time messaging application by extending an existing Angular Clarity boilerplate for the frontend and building a new dedicated backend. The solution will include user authentication, one-to-one and group chat functionality, message persistence, and robust real-time communication. Emphasis will be placed on security, scalability, and maintainability.
### 2. Key Milestones
* **Milestone 1: Core Messaging MVP (Estimated 4-6 Weeks)**
* User Registration, Login, and Profile Management (Backend & Frontend).
* One-to-One Real-time Text Messaging (Backend & Frontend).
* Message Persistence and Retrieval (Database & Backend API).
* Basic chat interface integrated into `messaging_app_base_cloned/frontend/src/` components.
* Initial `backend/` and `frontend/` service setup and Dockerization for local development.
* **Milestone 2: Enhanced Communication & Features (Estimated 3-5 Weeks)**
* Group Chat functionality with member management.
* Real-time Notifications for new messages and user presence.
* Support for sharing media (images, files) within chats.
* Enhanced user interface and experience for chat rooms and user lists.
* Improved error handling and feedback mechanisms.
* **Milestone 3: Deployment Readiness & Optimization (Estimated 2-3 Weeks)**
* Container orchestration with `docker-compose.yml` for multi-service setup.
* Implementation of CI/CD pipelines for automated testing and deployment.
* Performance optimization of backend and frontend for real-time traffic.
* Security hardening (rate limiting, input validation, secure connections).
* Comprehensive documentation for deployment and maintenance.
### 3. Core Modules & Components
* **Frontend (Leveraging `messaging_app_base_cloned/` Angular Clarity):**
* **UI Components:** `messaging_app_base_cloned/frontend/src/components/` (ChatWindow, MessageInput, UserList, ProfileCard, NotificationBanner).
* **Pages/Views:** `messaging_app_base_cloned/frontend/src/pages/` (LoginPage, RegisterPage, ChatPage, SettingsPage).
* **Services:** API client, WebSocket connection logic, State management (e.g., NGRX or RxJS based services).
* **Routing:** Frontend routing definitions (`messaging_app_base_cloned/frontend/src/routes/`).
* **Backend (New - `backend/` directory):**
* **Authentication Service:** User registration, login, token generation (e.g., JWT).
* **User Service:** User profiles, status management (online/offline).
* **Chat Service:** Message sending, retrieval, chat room management.
* **Real-time Service:** WebSocket server for live message exchange.
* **Database Integration:** ORM/ODM for interacting with message and user data stores.
* **Database (New - external service, configured via `backend/config/`):**
* **User Store:** User authentication details, profile information.
* **Message Store:** Message content, timestamps, sender/receiver, chat room IDs.
* **Chat Room Store:** Group chat metadata, member lists.
* **DevOps & Infrastructure (`deployment_config.yml`, Dockerfiles, `docker-compose.yml`, `nginx.conf`):**
* **Containerization:** Dockerfiles for `backend/` and `frontend/`.
* **Orchestration:** `docker-compose.yml` for multi-container local development and staging.
* **CI/CD:** Pipelines for automated builds, tests, and deployments.
* **Reverse Proxy:** Nginx configuration for serving frontend, routing API calls, and WebSocket proxying.
### 4. Constraints & Considerations
* **Base Project Preservation:** The `messaging_app_base_cloned/` Angular Clarity boilerplate must be extended and integrated, not replaced. Core boilerplate functionalities should remain intact where possible.
* **Append-Only Principle:** All agent-generated documents within `messaging_app_base_cloned/.sureai/` must be appended to, never overwritten.
* **Real-time Requirement:** All core messaging functionalities (send/receive) must operate in real-time.
* **Security:** Implement robust authentication, authorization, and data encryption. Adhere to OWASP best practices.
* **Scalability:** The architecture must be designed with future scalability in mind, capable of handling a growing number of concurrent users and messages.
* **Performance:** Optimize for low latency in message delivery and efficient resource usage.
* **Technology Stack:** Preference for open-source, widely supported technologies. Specific recommendations to be provided by io8architect.
* **Compliance:** Consider data privacy regulations if applicable.
## IMPLEMENTATION PLAN - Messaging App (io8codermaster) - 2025-10-10 04:04:00
**Project Title:** Messaging App
**User Prompt:** `messaging app`
### 1. High-Level Implementation Phases
* **Phase 1: Discovery & Requirements (io8analyst, io8architect, io8pm)**
* **Goal:** Define comprehensive functional and non-functional requirements and establish a solid architectural foundation.
* **Key Activities:**
* Detailed user story elicitation for all core messaging features.
* Feasibility study for integrating with Angular Clarity base.
* High-level system design including component interaction, data flow, and technology selection.
* Initial project planning, scope definition, and risk assessment.
* **Expected Outputs:** `messaging_app_base_cloned/.sureai/analysis_document.md`, `messaging_app_base_cloned/.sureai/requirements_document.md`, `messaging_app_base_cloned/.sureai/architecture_document.md`, `messaging_app_base_cloned/.sureai/tech_stack_document.md`, `messaging_app_base_cloned/.sureai/prd_document.md`, `messaging_app_base_cloned/.sureai/project_plan.md`.
* **Phase 2: Core Development & Integration (io8developer, io8sm, io8devops)**
* **Goal:** Develop and integrate the core messaging functionalities, ensuring real-time communication and user management.
* **Key Activities:**
* **Sprint 1 (Backend Core):** Implement user authentication, user profile management, and basic one-to-one message persistence API in `backend/`.
* **Sprint 2 (Frontend & Real-time):** Develop chat UI components in `messaging_app_base_cloned/frontend/src/`, integrate with backend APIs, and establish WebSocket connections for real-time messaging.
* **Sprint 3 (Deployment Foundation):** Create `Dockerfile.backend`, `Dockerfile.frontend`, and `docker-compose.yml` for local development setup. Set up basic CI/CD for automated builds.
* Continuous unit and integration testing.
* **Expected Outputs:** Functional backend services, integrated frontend UI, containerized applications, updated `messaging_app_base_cloned/.sureai/tasks_list.md`, `messaging_app_base_cloned/.sureai/sprint_plan.md`.
* **Phase 3: Feature Expansion & Quality Assurance (io8developer, io8sm, io8devops)**
* **Goal:** Implement advanced messaging features, conduct thorough testing, and prepare for production deployment.
* **Key Activities:**
* **Sprint 4 (Advanced Features):** Implement group chat, file sharing, and notification services.
* **Sprint 5 (Refinement & QA):** Comprehensive testing (E2E, performance, security), bug fixing, and UI/UX polish.
* **Sprint 6 (Production Readiness):** Finalize `deployment_config.yml`, `nginx.conf`, and CI/CD pipelines for production environment. Performance tuning and monitoring setup.
* **Expected Outputs:** Fully functional messaging app, comprehensive test reports, production-ready deployment configurations, stable CI/CD pipelines.
### 2. Estimated Resources (Per Phase - Subject to io8pm/io8architect refinement)
* **io8analyst:** ~20% of Phase 1 (Initial), then ~5% for ongoing clarifications.
* **io8architect:** ~30% of Phase 1 (Design), then ~10% for architectural guidance and reviews.
* **io8pm:** ~25% throughout all phases (Coordination, planning, risk management).
* **io8sm:** ~25% during development sprints (Facilitation, backlog management).
* **io8developer (Backend):** ~50% during Phase 2 & 3 (Backend service implementation).
* **io8developer (Frontend):** ~50% during Phase 2 & 3 (Frontend UI and integration).
* **io8devops:** ~20% of Phase 2 (Initial setup), then ~40% during Phase 3 (Deployment, CI/CD, infrastructure).
### 3. Key Deliverables
* Functional Messaging App (Web-based) hosted via Docker containers.
* Detailed `messaging_app_base_cloned/.sureai/analysis_document.md` and `requirements_document.md`.
* Robust `messaging_app_base_cloned/.sureai/architecture_document.md` and `tech_stack_document.md`.
* Comprehensive `messaging_app_base_cloned/.sureai/project_plan.md` and `tasks_list.md`.
* Containerization (Dockerfiles, `docker-compose.yml`) and CI/CD pipelines.
* Well-documented codebase for both `backend/` and `frontend/`.
### 4. Next Steps
The `io8codermaster` has laid the foundational plan. The next agent in the workflow, `io8analyst`, should now proceed to gather detailed functional and non-functional requirements, elaborating on the core features outlined in this plan. The `io8analyst` will update `messaging_app_base_cloned/.sureai/analysis_document.md` and `messaging_app_base_cloned/.sureai/requirements_document.md`.
## Base Agent Prompt Reference
This agent is based on the standard io8codermaster agent with project-specific customizations above.
Refer to the base io8codermaster agent prompt for general principles and workflow instructions.

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# io8 Project Builder Plan for messaging_app_20251010_040350
## High-level Scaffolding Plan
**Backend:**
- A RESTful API will be implemented to handle messaging functionalities (sending, receiving, storing messages).
- Core entities: User, Message, Conversation.
- Technologies will be determined from `.sureai/architecture_document.md` or default to Spring Boot.
**Frontend:**
- A web-based user interface for sending and receiving messages.
- Real-time communication features (e.g., using WebSockets if supported by the chosen backend framework).
- User authentication and authorization.
- Technologies will be determined from `.sureai/architecture_document.md` or default to Angular Clarity.
## Directory and File Scaffolding Strategy
The project will follow a standard directory structure for the chosen backend and frontend frameworks.
**Backend (e.g., Spring Boot):**
- `src/main/java/com/example/messagingapp/`: Main application code.
- `controller/`: REST API endpoints.
- `service/`: Business logic.
- `repository/`: Data access layer.
- `model/`: Data models (entities, DTOs).
- `src/main/resources/`: Configuration files, static assets.
- `src/test/`: Unit and integration tests.
**Frontend (e.g., Angular Clarity):**
- `src/app/`: Main application components.
- `components/`: Reusable UI components.
- `services/`: Data fetching and business logic.
- `models/`: Data models.
- `pages/`: Route-specific components.
- `src/assets/`: Static assets (images, icons).
- `src/environments/`: Environment-specific configurations.
## Build Tools and Scripts
- **Backend:** Maven or Gradle (for Spring Boot) for dependency management and building JAR/WAR files.
- **Frontend:** npm or yarn for dependency management, Angular CLI for building and serving the application.
- **io8 MCP:** Used for initial project creation, application building, and wireframe generation.
## Pre-developer Checks
Before development begins, the following checks will be performed:
- Ensure `.sureai/architecture_document.md` exists and is up-to-date for technology selection.
- Verify that `.sureai/io8_mcp/responses/create_project.out` contains valid project IDs.
- Confirm successful `git pull` of the generated project code.
## io8 Project Creation
**Project Name:** `messaging_app_20251010_040350` (extracted from the current directory path)
**Visibility:** Private (default assumption, can be changed based on requirements)
**Backend Technology:** To be determined from `.sureai/architecture_document.md` (defaulting to Spring Boot if not found).
**Database Technology:** To be determined from `.sureai/architecture_document.md` (defaulting to MySQL if not found).
**Frontend Technology:** To be determined from `.sureai/architecture_document.md` (defaulting to Angular Clarity if not found).
**Steps:**
1. Check for existing project in `.sureai/io8_mcp/responses/create_project.out`.
2. If not found, create the io8 project using the `create_project` tool with the above details.
3. Save the response to `.sureai/io8_mcp/responses/create_project.out`.

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{
"status": "success",
"message": "Build request submitted successfully",
"response_text": "Insert In job Pro Successfully done"
}

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{
"projectResp": {
"createdAt": "2025-10-10 04:07:40",
"updatedAt": "2025-10-10 04:07:41",
"createdBy": 10007301,
"updatedBy": 10007301,
"accountId": 122,
"id": 50593,
"owner": "Super Admin",
"owned_by": 10007301,
"projectName": "messaging_app_20251010_040350",
"description": null,
"copyTo": null,
"technologyStack": null,
"projectPrefix": null,
"major_version": null,
"minor_version": null,
"upload_Logo_name": null,
"upload_Logo_path": null,
"namespace": null,
"tags": null,
"category": null,
"accessibility": false,
"is_archived": false,
"is_active": true,
"is_aged": null,
"is_fav": null,
"favCnt": null,
"is_stared": null,
"staredCnt": null,
"is_watchlisted": null,
"watchlistedCnt": null,
"is_futuristic": null,
"futuristicCnt": null,
"is_pinned": null,
"pinnedCnt": null,
"private_deployid": null,
"isprivatedeploy": false,
"registery_profileid": 3,
"isregisteryprofile": true,
"github_profileid": null,
"isgithubprofile": false,
"modules": null,
"favourite": null,
"archived": null,
"workflow_id": 53,
"gitea_url": "http://157.66.191.31:3000/risadmin_prod/messaging_app_20251010_040350.git",
"isfirstbuild": false,
"company_Display_Name": null
},
"backendResp": {
"id": 2677,
"backend_service_name": "messaging_app_20251010_040350-b",
"techstack": "Spring Boot",
"description": null,
"proj_id": 50593,
"isprimary": true,
"db_id": 2885
},
"moduleResp": {
"createdAt": "2025-10-10 04:07:41",
"updatedAt": "2025-10-10 04:07:41",
"createdBy": null,
"updatedBy": null,
"accountId": null,
"id": 50602,
"moduleName": "messaging_app_20251010_040350-f",
"description": null,
"modulePrefix": null,
"copyTo": null,
"technologyStack": "Angular Clarity",
"is_active": true,
"tags": null,
"readme": false,
"dbName": null,
"dbUserName": null,
"dbPassword": null,
"portNumber": null,
"microservice": false,
"portaldeployment": false,
"parentrepo": null,
"copy_baseproj": false,
"loginservice": false,
"testing": false,
"type": null,
"rn_fb_headers": null,
"rn_report_builder": null,
"projectId": 0,
"projectName": null
},
"dbResp": {
"id": 2885,
"db_name": "messaging_app_20251010_040350-d",
"db_type": null,
"db_username": "root",
"db_password": "root",
"port_no": 3306,
"proj_id": 50593,
"techstack": "MySQL",
"host_name": null,
"existing_db": false,
"isdefault": false
}
}

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{
"createdAt": "2025-10-10 04:11:13",
"updatedAt": "2025-10-10 04:11:13",
"createdBy": 10007301,
"updatedBy": 10007301,
"accountId": null,
"id": 8205,
"techStack": "Spring Boot",
"objectType": "form",
"subObjectType": "only header",
"uiName": "MessagingAppWireframe",
"formType": null,
"tableName": null,
"lineTableName": null,
"multilineTableName": null,
"formCode": "MessagingAppWireframe_view",
"jspName": null,
"controllerName": "MessagingAppWireframeController",
"serviceName": null,
"serviceImplName": null,
"daoName": null,
"daoImplName": null,
"build": false,
"updated": false,
"menuName": null,
"headerName": "MessagingAppWireframe",
"convertedTableName": null,
"package_name": null,
"backend_id": 2677,
"testing": false,
"child_form": false,
"add_tomobile": false,
"editable": true,
"is_active": true,
"is_notification": null,
"add_to_card": false,
"card_id": null,
"add_to_apiregistery": null,
"isrealm": false,
"realm_id": null,
"notification_msg": null,
"table_type": null,
"type": null,
"rn_cff_actionBuilder": null,
"serviceTechid": null
}

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git pull successful

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git pull successful

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# Placeholder - DevOps will fill this later

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@ -57,4 +57,257 @@ This document outlines the directory structure for the Angular Clarity boilerpla
- `angular.json`: The configuration file for the Angular CLI.
- `package.json`: Defines the project's dependencies and scripts.
- `README.txt`: The main documentation file for the project.
- `tsconfig.json`: The configuration file for the TypeScript compiler.
- `tsconfig.json`: The configuration file for the TypeScript compiler.
---
## DIRECTORY STRUCTURE UPDATE - 2025-10-10 04:13:14
# Messaging App Project Directory Structure Documentation
This document outlines the expected directory and file organization for the 'Messaging App' project, building upon a cloned base project and strictly adhering to the io8Directory Structure Principles. As a base project has been detected, this documentation focuses on detailing the structure and its purpose within the context of a messaging application, without creating or modifying any existing files or directories.
## Core Project Structure for a Messaging App
The following structure integrates the needs of a messaging application within the mandatory io8 framework:
- **Project Root (`./`)**:
- **`.io8project/`**: This directory is reserved for internal agent state persistence and project metadata.
- `.state.json`: Maintains the current task state for agents.
- `project_metadata.json`: Stores high-level project information and configurations.
- **`cloned base project/`**: This directory represents the initial codebase cloned for the messaging app. It is the primary location for project-specific files and documentation.
- **`.sureai/`**: The central repository for all agent outputs, project-specific documents, and uploaded content.
- `uploads/`: A subdirectory dedicated to storing uploaded documents, images, and other assets used by agents, such as the requirement builder.
- **Agent Output Files (Hidden - prefixed with `.` and dynamically generated by specific agents)**:
- `.directory_structure_agent_messaging_app_messaging_app_20251010_040350.md`: This file, detailing the specific directory structure methodology for the 'messaging app' project, to guide subsequent agents.
- `.directory_structure_messaging_app_20251010_040350.md`: This document, where this content is appended, provides an evolving record of the project's directory structure.
- `.bmad_agent_messaging_app_20251010_040350.md`: Input prompt for the Business Model & Architecture Designer agent.
- `.analyst_agent_messaging_app_20251010_040350.md`: Input prompt for the Analyst agent.
- `.architect_agent_messaging_app_20251010_040350.md`: Input prompt for the Architect agent.
- `.pm_agent_messaging_app_20251010_040350.md`: Input prompt for the Project Manager agent.
- `.sm_agent_messaging_app_20251010_040350.md`: Input prompt for the Scrum Master agent.
- `.developer_agent_messaging_app_20251010_040350.md`: Input prompt for the Developer agent.
- `.devops_agent_messaging_app_20251010_040350.md`: Input prompt for the DevOps agent.
- `.bmad_*.md`: General outputs from the BMAD agent (e.g., business model canvas, value proposition).
- `.analyst_*.md`: General outputs from the Analyst agent (e.g., user stories, use cases).
- `.architect_*.md`: General outputs from the Architect agent (e.g., system design, component diagrams).
- `.developer_*.md`: General outputs from the Developer agent (e.g., code snippets, technical designs).
- `.devops_*.md`: General outputs from the DevOps agent (e.g., CI/CD pipelines, infrastructure as code).
- `.pm_*.md`: General outputs from the PM agent (e.g., project milestones, risk assessments).
- **Visible Project Documents (No dot prefix - created by their respective agents)**:
- `analysis_document.md`: Comprehensive analysis of the messaging app requirements and scope (by Analyst).
- `requirements_document.md`: Detailed functional and non-functional requirements for the messaging app (by Analyst).
- `architecture_document.md`: High-level and detailed architectural design for the messaging app (by Architect).
- `tech_stack_document.md`: Documentation of the chosen technologies and tools for the messaging app (by Architect).
- `prd_document.md`: Product Requirement Document for the messaging app (by PM).
- `project_plan.md`: Overall project plan, including phases, timelines, and resources (by PM).
- `tasks_list.md`: List of tasks, potentially including subtasks and assignments (by SM and Developer).
- `sprint_plan.md`: Plan for current and upcoming sprints (by SM).
- *Additional files and directories specific to the pre-existing base project codebase will reside here.*
- **`backend/`**: (Anticipated to be created by the Developer/DevOps agents if not present in the base project) This directory will house all server-side code and services critical for the messaging app's functionality. For a messaging app, this typically includes:
- `auth/`: User authentication and authorization services.
- `chat/`: Core message handling, storage, and retrieval logic.
- `users/`: User profile management and presence services.
- `notifications/`: Real-time notification handling (e.g., push notifications).
- `realtime/`: WebSocket or other real-time communication protocol implementations.
- `api/`: API definitions and controllers.
- `utils/`: Shared backend utilities and helper functions.
- `tests/`: Unit and integration tests for backend services.
- **`frontend/`**: (Anticipated to be created by the Developer/DevOps agents if not present in the base project) This directory will contain all client-side application code for the messaging app's user interface.
- `components/`: Reusable UI components (e.g., `MessageInput`, `UserAvatar`, `ChatBubble`).
- `pages/` or `views/`: Distinct screens or views (e.g., `ChatRoom`, `UserProfile`, `Login`, `Settings`).
- `services/` or `api/`: Client-side modules for interacting with the backend APIs.
- `store/`: State management (e.g., Redux, Vuex, Zustand) for the application's global state.
- `assets/`: Static assets such as images, icons, and fonts.
- `styles/`: Global styles, themes, and component-specific CSS/Sass files.
- `utils/`: Frontend utility functions.
- `tests/`: Unit and end-to-end tests for the frontend application.
- `public/`: Static files to be served directly (e.g., `index.html`, `manifest.json`).
- **`deployment_config.yml`**: (Anticipated to be created by DevOps agent) Root-level configuration file detailing deployment strategies and environment variables.
- **`Dockerfile.backend`**: (Anticipated to be created by DevOps agent) Docker build instructions specifically for the backend services of the messaging app.
- **`Dockerfile.frontend`**: (Anticipated to be created by DevOps agent) Docker build instructions specifically for the frontend application of the messaging app.
- **`docker-compose.yml`**: (Anticipated to be created by DevOps agent) Defines and runs multi-container Docker applications (backend, frontend, database, message queues, etc.) for local development and testing.
## Adherence to Directory Structure Principles
This documented structure consistently upholds the core principles:
- **Strict Structure Adherence**: The layout strictly follows the mandatory template, adapted for a messaging app.
- **Hidden Agent Outputs**: All internal agent-generated files are prefixed with a dot (`.`) and centrally located within `cloned base project/.sureai/`.
- **Visible Documents**: Key project documentation (analysis, requirements, architecture, etc.) is stored without a dot prefix in `cloned base project/.sureai/` for easy access.
- **Code Separation**: `backend/` and `frontend/` directories are clearly defined at the project root level to separate server-side logic from client-side presentation.
- **Root Level Files**: Essential configuration files like Dockerfiles and `docker-compose.yml` are placed at the project root for centralized management.
## Important Note for Base Projects
As this agent is operating on a *cloned base project*, it **does not create any directories or files** (e.g., `backend/`, `frontend/`, `Dockerfile`s, or the visible `.md` documents) beyond documenting the structure and providing agent-specific prompt files within `cloned base project/.sureai/`. The actual creation of these components will be handled by subsequent specialized agents (e.g., Developer, DevOps) as the project workflow progresses, ensuring that the defined structure is progressively realized and maintained.
---
## DIRECTORY STRUCTURE UPDATE - 2025-10-10 04:13:50
# Project Directory Structure for 'messaging app'
This document outlines the standard directory structure for the 'messaging app' project, adhering to the io8Directory Structure Principles. This structure is designed to organize project files, separate codebases, manage agent outputs, and streamline deployment within a base project environment.
**Project Root: `./` (Current Directory after cloning the base project)**
The project root (`./`) serves as the base for all project files and directories. When the base project is cloned, this directory becomes the working directory. The existing `.sureai/` folder from the cloned project is recognized and integrated into this structure.
## Core Directories and Files:
```
./
├── .io8project/ # io8 Project Metadata and State Management
│ ├── .state.json # Persistent task state for agents
│ └── project_metadata.json # Project-specific metadata
├── .sureai/ # Agent Outputs, Documents, and Uploads (already existing from cloned project)
│ ├── uploads/ # Directory for uploaded documents and images (e.g., for requirement builder agent)
│ ├── .directory_structure_messaging_app_messaging_app_20251010_040350.md # This document, detailing the structure
│ ├── .bmad_agent_messaging_app_20251010_040350.md # Hidden outputs from BMAD agent for this project
│ ├── .analyst_agent_messaging_app_20251010_040350.md # Hidden outputs from Analyst agent for this project
│ ├── .architect_agent_messaging_app_20251010_040350.md # Hidden outputs from Architect agent for this project
│ ├── .pm_agent_messaging_app_20251010_040350.md # Hidden outputs from PM agent for this project
│ ├── .sm_agent_messaging_app_20251010_040350.md # Hidden outputs from Scrum Master agent for this project
│ ├── .developer_agent_messaging_app_20251010_040350.md # Hidden outputs from Developer agent for this project
│ ├── .devops_agent_messaging_app_20251010_040350.md # Hidden outputs from DevOps agent for this project
│ ├── .bmad_*.md # General hidden BMAD agent outputs (e.g., older runs)
│ ├── .analyst_*.md # General hidden Analyst agent outputs
│ ├── .architect_*.md # General hidden Architect agent outputs
│ ├── .developer_*.md # General hidden Developer agent outputs
│ ├── .devops_*.md # General hidden DevOps agent outputs
│ ├── .pm_*.md # General hidden PM agent outputs
│ ├── analysis_document.md # Visible document for analysis details (created by Analyst agent)
│ ├── requirements_document.md # Visible document for project requirements (created by Analyst agent)
│ ├── architecture_document.md # Visible document for architecture design (created by Architect agent)
│ ├── tech_stack_document.md # Visible document for technology stack (created by Architect agent)
│ ├── prd_document.md # Visible document for Product Requirements Document (created by PM agent)
│ ├── project_plan.md # Visible document for project plan (created by PM agent)
│ ├── tasks_list.md # Visible document for project tasks (created by SM agent, updated by Developer)
│ └── sprint_plan.md # Visible document for sprint plans (created by SM agent)
├── backend/ # Contains all backend code and related files for the messaging app.
│ └── # e.g., src/, app/, config/, tests/ for backend services
├── frontend/ # Contains all frontend code and related assets for the messaging app.
│ └── # e.g., src/, public/, components/, pages/ for web/mobile UI
├── deployment_config.yml # Root-level configuration for deployment settings (to be created by DevOps agent)
├── Dockerfile.backend # Dockerfile specific to building the backend service (to be created by DevOps agent)
├── Dockerfile.frontend # Dockerfile specific to building the frontend service (to be created by DevOps agent)
└── docker-compose.yml # Docker Compose file for multi-container application setup (to be created by DevOps agent)
```
## Directory Details:
### `.io8project/`
This hidden directory (`.io8project/`) holds internal project metadata and state information crucial for the io8 agents. It is created at the root level alongside the cloned project's content.
- `.state.json`: Manages the current state and progress of tasks within the workflow.
- `project_metadata.json`: Stores general project information, configuration, and settings.
### `.sureai/`
This hidden directory (`.sureai/`) acts as the central hub for all agent-generated documentation, outputs, and uploaded assets. It is expected to already exist within the cloned base project.
- `uploads/`: A dedicated subdirectory for assets uploaded by users or other agents, such as diagrams, mockups, or reference documents that inform requirements.
- **Hidden Agent Output Files (`.bmad_*.md`, `.analyst_*.md`, etc.)**: These files, prefixed with a dot, contain intermediate outputs, logs, or detailed workings from individual agents. They are not intended for direct user consumption but serve as internal records. This includes this directory structure document itself.
- **Visible Documents (`analysis_document.md`, `requirements_document.md`, etc.)**: These Markdown files contain structured documentation generated by specific agents (e.g., Analyst, Architect, PM, SM). They are intended for human readability and collaboration. These will be appended by their respective agents as the project progresses.
### `backend/`
This directory is designated for all server-side logic and components of the messaging application. It will contain:
- API endpoints for sending/receiving messages.
- User authentication and authorization services.
- Database interaction logic for storing messages, user data, etc.
- Real-time communication services (e.g., WebSockets for live chat).
This directory will be created and populated by the Developer agent if not already present in the base project.
### `frontend/`
This directory is for the client-side code and assets of the messaging application, which will provide the user interface. It will contain:
- User interface components for chat rooms, message lists, input fields.
- Logic for displaying messages, user presence, notifications.
- Client-side routing and state management.
- Integration with backend APIs for real-time updates.
This directory will be created and populated by the Developer agent if not already present in the base project.
### Root Level Configuration Files:
These files are placed at the project root for easy access and management of the overall application environment. They will be created by the DevOps agent.
- `deployment_config.yml`: High-level configuration for deployment environments (e.g., staging, production).
- `Dockerfile.backend`: Defines how to build the backend Docker image.
- `Dockerfile.frontend`: Defines how to build the frontend Docker image.
- `docker-compose.yml`: Orchestrates the multi-container messaging application, defining services like the backend, frontend, database, and potentially other services like Nginx or a message broker.
This structured approach ensures clarity, maintainability, and efficient collaboration throughout the development lifecycle of the 'messaging app'.
---
## DIRECTORY STRUCTURE UPDATE - 2025-10-10 04:14:22
```
./
├── .io8project/
│ ├── .state.json # Task state persistence (managed by io8project_builder)
│ └── project_metadata.json # Project metadata (managed by io8project_builder)
├── messaging_app_base_cloned/ # Cloned base project directory, containing base template and .sureai/
│ ├── .sureai/ # Agent outputs and project documents directory (from cloned base project)
│ │ ├── uploads/ # Uploaded documents and images for requirement builder agent
│ │ ├── .directory_structure_messaging_app_messaging_app_20251010_040350.md # This document, generated by io8directory_structure agent
│ │ ├── .bmad_agent_messaging_app_20251010_040350.md # Hidden output of BMAD agent for 'messaging app'
│ │ ├── .analyst_agent_messaging_app_20251010_040350.md # Hidden output of Analyst agent for 'messaging app'
│ │ ├── .architect_agent_messaging_app_20251010_040350.md # Hidden output of Architect agent for 'messaging app'
│ │ ├── .pm_agent_messaging_app_20251010_040350.md # Hidden output of PM agent for 'messaging app'
│ │ ├── .sm_agent_messaging_app_20251010_040350.md # Hidden output of SM agent for 'messaging app'
│ │ ├── .developer_agent_messaging_app_20251010_040350.md # Hidden output of Developer agent for 'messaging app'
│ │ ├── .devops_agent_messaging_app_20251010_040350.md # Hidden output of DevOps agent for 'messaging app'
│ │ ├── .bmad_*.md # Placeholder for other hidden BMAD agent outputs
│ │ ├── .analyst_*.md # Placeholder for other hidden Analyst agent outputs
│ │ ├── .architect_*.md # Placeholder for other hidden Architect agent outputs
│ │ ├── .developer_*.md # Placeholder for other hidden Developer agent outputs
│ │ ├── .devops_*.md # Placeholder for other hidden DevOps agent outputs
│ │ ├── .pm_*.md # Placeholder for other hidden PM agent outputs
│ │ ├── analysis_document.md # Project analysis (created by Analyst agent)
│ │ ├── requirements_document.md # Project requirements (created by Analyst agent)
│ │ ├── architecture_document.md # Project architecture (created by Architect agent)
│ │ ├── tech_stack_document.md # Project tech stack details (created by Architect agent)
│ │ ├── prd_document.md # Product Requirements Document (created by PM agent)
│ │ ├── project_plan.md # Overall project plan (created by PM agent)
│ │ ├── tasks_list.md # Scrum tasks list (created by Scrum Master agent, updated by Developer)
│ │ └── sprint_plan.md # Current sprint plan (created by Scrum Master agent)
│ └── # Other existing files/folders from the cloned base project (e.g., base code, README.md, license)
├── backend/ # Backend code and related files for the messaging app
│ ├── src/
│ │ ├── api/ # REST API endpoint definitions (e.g., user management, message handling, authentication)
│ │ ├── services/ # Business logic and data manipulation (e.g., UserService, MessageService, ChatService)
│ │ ├── models/ # Database schemas/ORM definitions (e.g., User, Message, ChatRoom, Notification)
│ │ ├── config/ # Configuration files (e.g., database connection, environment variables, JWT setup)
│ │ ├── utils/ # Utility functions and helper classes (e.g., data validation, encryption)
│ │ ├── middleware/ # Express/Koa middleware for authentication, logging, error handling
│ │ ├── websockets/ # WebSocket handlers and event listeners for real-time messaging
│ │ └── app.js # Main backend application entry point
│ ├── tests/ # Unit, integration, and end-to-end tests for backend components
│ ├── node_modules/ # Node.js dependencies (e.g., Express, Socket.IO, Mongoose)
│ ├── package.json # Backend project dependencies and scripts
│ ├── package-lock.json # Specific dependency versions for backend
│ ├── .env.example # Example environment variables for backend setup
│ └── README.md # Backend specific README documenting setup and usage
├── frontend/ # Frontend code and related files for the messaging app
│ ├── public/ # Static assets (e.g., index.html, favicon, manifest.json)
│ ├── src/
│ │ ├── assets/ # Images, icons, fonts, global styles (e.g., CSS, Sass files)
│ │ ├── components/ # Reusable UI components (e.g., MessageInput, ChatWindow, UserList, ProfileCard)
│ │ ├── pages/ # Main application views/screens (e.g., LoginPage, RegisterPage, ChatPage, SettingsPage)
│ │ ├── services/ # API client, WebSocket connection logic, utility functions for frontend communication
│ │ ├── contexts/ # React Contexts, Redux store, or other state management contexts (e.g., AuthContext, ChatContext)
│ │ ├── hooks/ # Custom React Hooks for reusable logic (if applicable)
│ │ ├── routes/ # Frontend routing definitions (e.g., React Router configuration)
│ │ ├── App.js # Main frontend application component
│ │ └── index.js # Frontend entry point (e.g., React DOM render)
│ ├── node_modules/ # Node.js dependencies (e.g., React, ReactDOM, Socket.IO-client)
│ ├── package.json # Frontend project dependencies and scripts
│ ├── package-lock.json # Specific dependency versions for frontend
│ ├── .env.example # Example environment variables for frontend setup
│ └── README.md # Frontend specific README documenting setup and usage
├── deployment_config.yml # Root level deployment configuration for CI/CD pipelines (created by DevOps agent)
├── Dockerfile.backend # Dockerfile for building the backend application image (created by DevOps agent)
├── Dockerfile.frontend # Dockerfile for building the frontend application image (created by DevOps agent)
├── docker-compose.yml # Docker Compose file for local development and orchestration (created by DevOps agent)
└── nginx.conf # Nginx configuration for reverse proxy, load balancing, and serving static frontend files (created by DevOps agent)
```

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@ -65,4 +65,121 @@
* **Phase 4: Build & Deployment**
* Build the application for production.
* Deploy to a hosting service.
* Set up CI/CD pipelines for automated builds and deployments.
* Set up CI/CD pipelines for automated builds and deployments.
---
## CODER BREAKDOWN UPDATE - 2025-10-10 04:15:33
# Project Breakdown: Messaging App - 2025-10-10 04:15:00
**Context:** Building a real-time "messaging app" based on an existing Angular Clarity boilerplate project. The project will leverage a clear separation of frontend and backend within the defined directory structure (`frontend/`, `backend/`).
**High-Level Project Phases & Milestones:**
1. **Phase 1: Discovery & Architecture (Weeks 1-2)**
* **Milestone:** Detailed Requirements & High-Level Architecture (`analysis_document.md`, `requirements_document.md`, `architecture_document.md`, `tech_stack_document.md`).
* **Focus:** Core messaging functionalities (1:1 chat), user management, real-time communication strategy.
* **Agents Involved:** io8analyst, io8architect, io8pm (for initial plan).
2. **Phase 2: Core Messaging MVP Development (Weeks 3-6)**
* **Milestone:** Functional 1:1 Messaging System with User Auth & Basic UI.
* **Focus:** Backend development for auth, user profiles, real-time chat, message persistence. Frontend integration with Angular Clarity for sending/receiving messages and displaying chat history.
* **Agents Involved:** io8developer (Backend & Frontend), io8sm.
3. **Phase 3: Feature Expansion & Refinement (Weeks 7-9)**
* **Milestone:** Group Chat, Notifications, Enhanced UI/UX.
* **Focus:** Adding group chat capabilities, implementing notifications (in-app/push), improving user interface, error handling, and performance optimizations.
* **Agents Involved:** io8developer (Backend & Frontend), io8sm, io8pm.
4. **Phase 4: Deployment & Operations (Week 10+)**
* **Milestone:** Production-Ready Deployment & CI/CD.
* **Focus:** Containerization (Docker), CI/CD pipeline setup, monitoring, logging, and infrastructure as code.
* **Agents Involved:** io8devops.
**Key Components & Responsibilities:**
* **Frontend (`frontend/`):** Angular Clarity application for user interface and interaction. Responsible for presenting chat, user lists, and integrating with backend APIs.
* **Backend (`backend/`):** API services for authentication, user management, and real-time messaging. Handles message routing, persistence, and business logic.
* **Database:** Stores user data, message history, conversation metadata.
* **Real-time Layer:** WebSocket server for immediate message delivery and presence updates.
**Constraints:**
* **Base Project:** Must integrate with and extend the provided Angular Clarity boilerplate.
* **Append-only:** All documentation updates for predefined files must be appended, not overwritten.
* **Directory Structure:** Adherence to `.sureai/.directory_structure_messaging_app_messaging_app_20251010_040350.md` for all outputs and code organization.
* **io8 Workflow:** Strict adherence to the io8 agent workflow and interaction protocols.
---
## CODER BREAKDOWN UPDATE - 2025-10-10 04:16:14
## PROJECT BREAKDOWN - Messaging App (io8codermaster) - 2025-10-10 04:04:00
**Project Title:** Messaging App
**User Prompt:** `messaging app`
### 1. Project Overview
Develop a real-time messaging application by extending an existing Angular Clarity boilerplate for the frontend and building a new dedicated backend. The solution will include user authentication, one-to-one and group chat functionality, message persistence, and robust real-time communication. Emphasis will be placed on security, scalability, and maintainability.
### 2. Key Milestones
* **Milestone 1: Core Messaging MVP (Estimated 4-6 Weeks)**
* User Registration, Login, and Profile Management (Backend & Frontend).
* One-to-One Real-time Text Messaging (Backend & Frontend).
* Message Persistence and Retrieval (Database & Backend API).
* Basic chat interface integrated into `messaging_app_base_cloned/frontend/src/` components.
* Initial `backend/` and `frontend/` service setup and Dockerization for local development.
* **Milestone 2: Enhanced Communication & Features (Estimated 3-5 Weeks)**
* Group Chat functionality with member management.
* Real-time Notifications for new messages and user presence.
* Support for sharing media (images, files) within chats.
* Enhanced user interface and experience for chat rooms and user lists.
* Improved error handling and feedback mechanisms.
* **Milestone 3: Deployment Readiness & Optimization (Estimated 2-3 Weeks)**
* Container orchestration with `docker-compose.yml` for multi-service setup.
* Implementation of CI/CD pipelines for automated testing and deployment.
* Performance optimization of backend and frontend for real-time traffic.
* Security hardening (rate limiting, input validation, secure connections).
* Comprehensive documentation for deployment and maintenance.
### 3. Core Modules & Components
* **Frontend (Leveraging `messaging_app_base_cloned/` Angular Clarity):**
* **UI Components:** `messaging_app_base_cloned/frontend/src/components/` (ChatWindow, MessageInput, UserList, ProfileCard, NotificationBanner).
* **Pages/Views:** `messaging_app_base_cloned/frontend/src/pages/` (LoginPage, RegisterPage, ChatPage, SettingsPage).
* **Services:** API client, WebSocket connection logic, State management (e.g., NGRX or RxJS based services).
* **Routing:** Frontend routing definitions (`messaging_app_base_cloned/frontend/src/routes/`).
* **Backend (New - `backend/` directory):**
* **Authentication Service:** User registration, login, token generation (e.g., JWT).
* **User Service:** User profiles, status management (online/offline).
* **Chat Service:** Message sending, retrieval, chat room management.
* **Real-time Service:** WebSocket server for live message exchange.
* **Database Integration:** ORM/ODM for interacting with message and user data stores.
* **Database (New - external service, configured via `backend/config/`):**
* **User Store:** User authentication details, profile information.
* **Message Store:** Message content, timestamps, sender/receiver, chat room IDs.
* **Chat Room Store:** Group chat metadata, member lists.
* **DevOps & Infrastructure (`deployment_config.yml`, Dockerfiles, `docker-compose.yml`, `nginx.conf`):**
* **Containerization:** Dockerfiles for `backend/` and `frontend/`.
* **Orchestration:** `docker-compose.yml` for multi-container local development and staging.
* **CI/CD:** Pipelines for automated builds, tests, and deployments.
* **Reverse Proxy:** Nginx configuration for serving frontend, routing API calls, and WebSocket proxying.
### 4. Constraints & Considerations
* **Base Project Preservation:** The `messaging_app_base_cloned/` Angular Clarity boilerplate must be extended and integrated, not replaced. Core boilerplate functionalities should remain intact where possible.
* **Append-Only Principle:** All agent-generated documents within `messaging_app_base_cloned/.sureai/` must be appended to, never overwritten.
* **Real-time Requirement:** All core messaging functionalities (send/receive) must operate in real-time.
* **Security:** Implement robust authentication, authorization, and data encryption. Adhere to OWASP best practices.
* **Scalability:** The architecture must be designed with future scalability in mind, capable of handling a growing number of concurrent users and messages.
* **Performance:** Optimize for low latency in message delivery and efficient resource usage.
* **Technology Stack:** Preference for open-source, widely supported technologies. Specific recommendations to be provided by io8architect.
* **Compliance:** Consider data privacy regulations if applicable.

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@ -56,4 +56,121 @@
**Assumptions:**
* The developer has a basic understanding of Angular and the Clarity Design System.
* The developer has Node.js and the Angular CLI installed.
* The developer has Node.js and the Angular CLI installed.
---
## CODER PLAN UPDATE - 2025-10-10 04:15:33
# Project Implementation Plan: Messaging App - 2025-10-10 04:15:00
**Overall Approach:** An agile, iterative development cycle will be employed, focusing on delivering a functional Minimum Viable Product (MVP) for core messaging features before progressively adding advanced capabilities.
**Phased Timeline (Estimates - Subject to Refinement by io8pm/io8sm):**
* **Phase 1: Discovery & Architecture (Estimated 2 Weeks)**
* **Activities:** User story gathering, requirements definition, architectural design, database schema proposal, API contract definition.
* **Outputs:** `analysis_document.md`, `requirements_document.md`, `architecture_document.md`, `tech_stack_document.md`.
* **Key Dependencies:** Clear user prompt, timely input from io8analyst and io8architect.
* **Agent Focus:** io8analyst, io8architect, initial input from io8pm.
* **Phase 2: Core Messaging MVP Development (Estimated 4 Weeks)**
* **Activities:** Implement user authentication (backend/frontend), build core WebSocket server, develop message sending/receiving logic, persist messages, create basic chat UI components within Angular Clarity.
* **Outputs:** Initial codebase in `backend/` and `frontend/`, early technical designs appended to `.sureai/.developer_*.md`, `tasks_list.md`, `sprint_plan.md`.
* **Key Dependencies:** Approved architecture, clear API specifications.
* **Agent Focus:** io8developer (Backend & Frontend), io8sm.
* **Phase 3: Feature Expansion & Refinement (Estimated 3 Weeks)**
* **Activities:** Develop group chat functionality, implement real-time notifications, enhance frontend UX/UI, conduct integration testing, performance tuning.
* **Outputs:** Enhanced codebase, updated `tasks_list.md`, `sprint_plan.md`, `prd_document.md` refinement.
* **Key Dependencies:** Completion of MVP features, feedback from initial testing.
* **Agent Focus:** io8developer (Backend & Frontend), io8pm, io8sm.
* **Phase 4: Deployment & Operations (Estimated 2 Weeks)**
* **Activities:** Create Dockerfiles for frontend/backend, set up `docker-compose.yml`, establish CI/CD pipelines, configure monitoring and logging, prepare `deployment_config.yml`.
* **Outputs:** `Dockerfile.backend`, `Dockerfile.frontend`, `docker-compose.yml`, `deployment_config.yml`, deployment documentation in `.sureai/.devops_*.md`.
* **Key Dependencies:** Stable codebase from Phase 3.
* **Agent Focus:** io8devops.
**Resource Allocation (io8 Agents):**
* **io8codermaster:** Orchestration, high-level guidance, workflow enforcement.
* **io8analyst:** Requirements gathering, user stories, use cases.
* **io8architect:** System design, technology stack selection, API contracts.
* **io8pm:** Project oversight, scope management, stakeholder communication, `project_plan.md`, `prd_document.md`.
* **io8sm:** Sprint planning, task management, team facilitation, `sprint_plan.md`, `tasks_list.md`.
* **io8developer:** Actual code implementation (backend services, frontend components).
* **io8devops:** Infrastructure setup, CI/CD, deployment, monitoring.
**Initial Risk Assessment:**
* **Scalability:** Real-time messaging can be resource-intensive. Early architectural decisions must account for horizontal scaling.
* **Performance:** Network latency and message processing speed are critical for user experience. Benchmarking and optimization are essential.
* **Security:** Authentication, message encryption (in-transit at least), and data privacy are paramount.
* **Integration Complexity:** Integrating a new backend and real-time layer with an existing Angular Clarity boilerplate may present challenges.
* **Scope Creep:** Managing feature requests to maintain an MVP focus is crucial.
**Next Steps:**
The `io8codermaster` will now instruct the `io8analyst` to begin detailed requirements gathering based on this breakdown and plan.
---
## CODER PLAN UPDATE - 2025-10-10 04:16:14
## IMPLEMENTATION PLAN - Messaging App (io8codermaster) - 2025-10-10 04:04:00
**Project Title:** Messaging App
**User Prompt:** `messaging app`
### 1. High-Level Implementation Phases
* **Phase 1: Discovery & Requirements (io8analyst, io8architect, io8pm)**
* **Goal:** Define comprehensive functional and non-functional requirements and establish a solid architectural foundation.
* **Key Activities:**
* Detailed user story elicitation for all core messaging features.
* Feasibility study for integrating with Angular Clarity base.
* High-level system design including component interaction, data flow, and technology selection.
* Initial project planning, scope definition, and risk assessment.
* **Expected Outputs:** `messaging_app_base_cloned/.sureai/analysis_document.md`, `messaging_app_base_cloned/.sureai/requirements_document.md`, `messaging_app_base_cloned/.sureai/architecture_document.md`, `messaging_app_base_cloned/.sureai/tech_stack_document.md`, `messaging_app_base_cloned/.sureai/prd_document.md`, `messaging_app_base_cloned/.sureai/project_plan.md`.
* **Phase 2: Core Development & Integration (io8developer, io8sm, io8devops)**
* **Goal:** Develop and integrate the core messaging functionalities, ensuring real-time communication and user management.
* **Key Activities:**
* **Sprint 1 (Backend Core):** Implement user authentication, user profile management, and basic one-to-one message persistence API in `backend/`.
* **Sprint 2 (Frontend & Real-time):** Develop chat UI components in `messaging_app_base_cloned/frontend/src/`, integrate with backend APIs, and establish WebSocket connections for real-time messaging.
* **Sprint 3 (Deployment Foundation):** Create `Dockerfile.backend`, `Dockerfile.frontend`, and `docker-compose.yml` for local development setup. Set up basic CI/CD for automated builds.
* Continuous unit and integration testing.
* **Expected Outputs:** Functional backend services, integrated frontend UI, containerized applications, updated `messaging_app_base_cloned/.sureai/tasks_list.md`, `messaging_app_base_cloned/.sureai/sprint_plan.md`.
* **Phase 3: Feature Expansion & Quality Assurance (io8developer, io8sm, io8devops)**
* **Goal:** Implement advanced messaging features, conduct thorough testing, and prepare for production deployment.
* **Key Activities:**
* **Sprint 4 (Advanced Features):** Implement group chat, file sharing, and notification services.
* **Sprint 5 (Refinement & QA):** Comprehensive testing (E2E, performance, security), bug fixing, and UI/UX polish.
* **Sprint 6 (Production Readiness):** Finalize `deployment_config.yml`, `nginx.conf`, and CI/CD pipelines for production environment. Performance tuning and monitoring setup.
* **Expected Outputs:** Fully functional messaging app, comprehensive test reports, production-ready deployment configurations, stable CI/CD pipelines.
### 2. Estimated Resources (Per Phase - Subject to io8pm/io8architect refinement)
* **io8analyst:** ~20% of Phase 1 (Initial), then ~5% for ongoing clarifications.
* **io8architect:** ~30% of Phase 1 (Design), then ~10% for architectural guidance and reviews.
* **io8pm:** ~25% throughout all phases (Coordination, planning, risk management).
* **io8sm:** ~25% during development sprints (Facilitation, backlog management).
* **io8developer (Backend):** ~50% during Phase 2 & 3 (Backend service implementation).
* **io8developer (Frontend):** ~50% during Phase 2 & 3 (Frontend UI and integration).
* **io8devops:** ~20% of Phase 2 (Initial setup), then ~40% during Phase 3 (Deployment, CI/CD, infrastructure).
### 3. Key Deliverables
* Functional Messaging App (Web-based) hosted via Docker containers.
* Detailed `messaging_app_base_cloned/.sureai/analysis_document.md` and `requirements_document.md`.
* Robust `messaging_app_base_cloned/.sureai/architecture_document.md` and `tech_stack_document.md`.
* Comprehensive `messaging_app_base_cloned/.sureai/project_plan.md` and `tasks_list.md`.
* Containerization (Dockerfiles, `docker-compose.yml`) and CI/CD pipelines.
* Well-documented codebase for both `backend/` and `frontend/`.
### 4. Next Steps
The `io8codermaster` has laid the foundational plan. The next agent in the workflow, `io8analyst`, should now proceed to gather detailed functional and non-functional requirements, elaborating on the core features outlined in this plan. The `io8analyst` will update `messaging_app_base_cloned/.sureai/analysis_document.md` and `messaging_app_base_cloned/.sureai/requirements_document.md`.

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@ -60,4 +60,251 @@ The boilerplate will provide the following functional capabilities out-of-the-bo
- Singleton services (e.g., logging, authentication) must be provided in the `CoreModule`.
- Reusable components, pipes, and directives that do not have a dependency on services must be declared and exported in the `SharedModule`.
- All major application features should be encapsulated within their own lazy-loaded modules.
- Environment-specific variables (e.g., API endpoints) must be managed in the `environments` folder.
- Environment-specific variables (e.g., API endpoints) must be managed in the `environments` folder.
---
## BUSINESS ANALYSIS UPDATE - 2025-10-10 04:17:44
# Analysis Document
Generated: 2025-10-10T[timestamp]
## Project Overview
Based on `io8codermaster_breakdown.md`, the project is to develop a real-time "Messaging App" by extending an existing Angular Clarity boilerplate for the frontend and building a new dedicated backend. It will include user authentication, one-to-one and group chat, message persistence, real-time communication, and potentially media sharing and notifications. The core goal is to provide a robust, scalable, and secure real-time communication platform.
## Business Analysis
The messaging app aims to provide instant and reliable communication. Its value lies in enabling seamless interaction between users in real-time. The project leverages an existing Angular Clarity boilerplate, ensuring a modern and consistent UI/UX on the frontend. Key business drivers include user engagement through instant communication, the need for secure and persistent chat history, and the flexibility for future feature expansion (e.g., group chat, media sharing). The separation of frontend and backend allows for architectural flexibility and scalability.
## User Requirements
Extracted from `io8codermaster_breakdown.md` and `io8codermaster_plan.md`:
1. **User Authentication & Management:** Users need to register, log in, and manage their profiles.
2. **One-to-One Real-time Messaging:** Users must be able to send and receive text messages instantly with another specific user.
3. **Message Persistence:** Messages need to be stored and retrievable to view chat history.
4. **Basic Chat Interface:** A user-friendly interface for sending and viewing messages.
5. **Group Chat (Future):** Ability to create and participate in group conversations.
6. **Real-time Notifications (Future):** Users should be notified of new messages or events.
7. **Media Sharing (Future):** Ability to share images/files within chats.
8. **Security:** User data and communications must be secure.
9. **Scalability:** The application should handle a growing number of users and messages.
10. **Performance:** Low latency for message delivery is critical.
11. **Integration with Angular Clarity:** Frontend must seamlessly extend the provided boilerplate.
## Functional Requirements
* **User Management:**
* FR-001: User Registration
* FR-002: User Login/Logout
* FR-003: User Profile Management (View/Edit)
* FR-004: User Presence (Online/Offline Status)
* FR-005: User Search (Find other users to chat with)
* **One-to-One Messaging:**
* FR-006: Send Text Message (1:1)
* FR-007: Receive Text Message (1:1)
* FR-008: View Message History (1:1)
* FR-009: Real-time Message Delivery (1:1)
* **Group Messaging (Future):**
* FR-010: Create Group Chat
* FR-011: Add/Remove Members from Group
* FR-012: Send Text Message (Group)
* FR-013: Receive Text Message (Group)
* FR-014: View Message History (Group)
* **Notifications (Future):**
* FR-015: New Message Notification
* FR-016: User Online/Offline Status Notification
* **Media Sharing (Future):**
* FR-017: Send Image/File in Chat
* FR-018: View Shared Image/File in Chat
## Non-Functional Requirements
* **Performance:**
* NFR-001: Message Latency: Messages should be delivered within 500ms under normal load.
* NFR-002: Concurrent Users: The system should support at least 1,000 concurrent users (MVP), scalable to 10,000+.
* **Security:**
* NFR-003: Authentication: Implement JWT-based authentication for all API endpoints.
* NFR-004: Authorization: Ensure users can only access their own messages and authorized chats.
* NFR-005: Data Encryption: Messages in transit must be encrypted (e.g., TLS/WSS).
* NFR-006: Input Validation: All user inputs must be validated to prevent injection attacks.
* **Scalability:**
* NFR-007: Horizontal Scaling: Backend services should be designed for statelessness to support horizontal scaling.
* NFR-008: Database Scalability: Database solution should support scaling with data growth.
* **Usability:**
* NFR-009: Responsive UI: The application UI must be responsive across various screen sizes.
* NFR-010: Intuitive Chat Flow: The chat interface should be easy to understand and use.
* **Reliability:**
* NFR-011: Message Delivery Guarantee: Messages sent should be reliably delivered and persisted.
* NFR-012: Error Handling: The system should gracefully handle errors and provide user-friendly feedback.
* **Maintainability:**
* NFR-013: Modular Architecture: Codebase should be modular and adhere to best practices for easy maintenance.
* NFR-014: Documentation: Comprehensive documentation for API endpoints, frontend components, and deployment.
## User Stories
* **Authentication & Profile:**
* **As a new user**, I want to register an account so I can start using the messaging app.
* **Acceptance Criteria:** Given I am on the registration page, When I enter valid details and submit, Then my account is created and I am logged in.
* **As a registered user**, I want to log in so I can access my chats.
* **Acceptance Criteria:** Given I am on the login page, When I enter my credentials, Then I am authenticated and redirected to my chat dashboard.
* **As a user**, I want to see my online/offline status so others know my availability.
* **Acceptance Criteria:** Given I am logged in, When I navigate to the app, Then my status is shown as "Online" to other users. When I log out, Then my status changes to "Offline".
* **One-to-One Chat:**
* **As a user**, I want to view a list of my existing conversations so I can quickly resume chatting.
* **Acceptance Criteria:** Given I am on the chat dashboard, When I view the sidebar, Then I see a list of my active 1:1 chats with the last message preview.
* **As a user**, I want to send a text message to another user in real-time so we can communicate instantly.
* **Acceptance Criteria:** Given I am in a 1:1 chat with another user, When I type a message and press send, Then the message appears in my chat window and instantly in the recipient's chat window.
* **As a user**, I want to see my chat history with another user so I can recall past conversations.
* **Acceptance Criteria:** Given I open a 1:1 chat, When the chat window loads, Then I see the history of messages exchanged with that user, loaded from the server.
## Business Rules
1. All user registrations require a unique username and email.
2. Messages can only be sent to and received from authenticated users.
3. Message content cannot exceed 2000 characters.
4. Users must confirm their password during registration.
5. Group chats require a minimum of 2 members (excluding the creator).
6. Only group administrators can add or remove members from a group chat.
---
## BUSINESS ANALYSIS UPDATE - 2025-10-10 04:18:09
## Update: Project Phases and Milestones (2025-10-10T[timestamp])
Based on `io8codermaster_breakdown.md` and `io8codermaster_plan.md`, the project development will follow distinct phases:
### Phase 1: Discovery & Architecture
* **Goal:** Define comprehensive requirements and establish a solid architectural foundation.
* **Focus:** Detailed requirements, high-level architecture, database schema, API contracts.
### Phase 2: Core Messaging MVP Development
* **Goal:** Deliver a functional 1:1 Messaging System with User Authentication & Basic UI.
* **Focus:** Backend development for auth, user profiles, real-time chat, message persistence. Frontend integration with Angular Clarity for sending/receiving messages and displaying chat history. Initial Dockerization.
### Phase 3: Feature Expansion & Quality Assurance
* **Goal:** Implement advanced messaging features, conduct thorough testing, and prepare for production deployment.
* **Focus:** Group Chat, Real-time Notifications, Media Sharing, UI/UX enhancements, comprehensive testing, performance tuning.
### Phase 4: Deployment Readiness & Operations
* **Goal:** Establish production-ready deployment and CI/CD.
* **Focus:** Container orchestration (`docker-compose.yml`), CI/CD pipeline setup, monitoring, logging, and infrastructure as code.
## Update: Key Architectural Components (2025-10-10T[timestamp])
As outlined in `io8codermaster_breakdown.md`, the system will comprise:
* **Frontend:** Angular Clarity application (`frontend/`) for user interface and interaction.
* **Backend:** Dedicated API services (`backend/`) for authentication, user management, and real-time messaging.
* **Database:** Stores user data, message history, conversation metadata (external service, configured via `backend/config/`).
* **Real-time Layer:** WebSocket server for immediate message delivery and presence updates.
* **DevOps & Infrastructure:** Dockerfiles, `docker-compose.yml`, `deployment_config.yml`, `nginx.conf` for containerization, orchestration, and deployment.
## Update: Constraints and Considerations (2025-10-10T[timestamp])
Referencing `io8codermaster_breakdown.md`, the project adheres to the following critical constraints and considerations:
* **Base Project Integration:** Must extend the provided Angular Clarity boilerplate, not replace it.
* **Documentation Principle:** All documentation updates for predefined files must be appended, not overwritten.
* **Real-time Requirement:** All core messaging functionalities must operate in real-time.
* **Security:** Robust authentication, authorization, and data encryption are paramount.
* **Scalability:** Architecture must support a growing number of concurrent users and messages.
* **Performance:** Low latency for message delivery is critical.
* **Directory Structure:** Strict adherence to the `.sureai/.directory_structure_messaging_app_messaging_app_20251010_040350.md` for all outputs.
## Update: Initial Risk Assessment Summary (2025-10-10T[timestamp])
Based on `io8codermaster_plan.md`, initial risks include:
* **Scalability:** Real-time messaging can be resource-intensive; architectural decisions must account for horizontal scaling.
* **Performance:** Network latency and message processing speed are critical for UX; benchmarking and optimization are essential.
* **Security:** Authentication, message encryption, and data privacy are paramount; adherence to OWASP best practices.
* **Integration Complexity:** Integrating a new backend and real-time layer with an existing Angular Clarity boilerplate may present challenges.
* **Scope Creep:** Managing feature requests to maintain an MVP focus is crucial.
---
## BUSINESS ANALYSIS UPDATE - 2025-10-10 04:19:20
```markdown
# Analysis Document
Generated: 2025-10-10T04:04:00.075502
## Project Overview
The project involves developing a real-time messaging application by extending an existing Angular Clarity boilerplate for the frontend and building a new, dedicated backend. The core objective is to provide secure, scalable, and real-time communication, supporting one-to-one and eventually group chats, with user authentication and message persistence. This build leverages a clear separation between frontend and backend services and adheres to an agile, iterative development methodology focusing on an MVP first. (Referenced from `.io8codermaster_breakdown.md` and `.io8codermaster_plan.md`)
## Business Analysis
**Goal:** To deliver a robust, user-friendly real-time messaging application that facilitates efficient communication, as defined in `.io8codermaster_breakdown.md`.
**Target Audience:** Individuals and small teams requiring instant, secure digital communication. The boilerplate's initial target of Angular developers will evolve to include end-users of the messaging app.
**Value Proposition:** The application will offer a reliable and intuitive platform for real-time interaction, leveraging modern web technologies (Angular Clarity, WebSockets) to ensure a smooth user experience. It will reduce communication latency and provide persistent chat history, addressing the core communication needs outlined in the project breakdown.
**Key Business Objectives:**
* Enable instant, one-to-one text messaging between users (Milestone 1 from `.io8codermaster_breakdown.md`).
* Provide secure user authentication and profile management (Milestone 1 from `.io8codermaster_breakdown.md`).
* Ensure messages are persistently stored and retrievable (Milestone 1 from `.io8codermaster_breakdown.md`).
* Offer an intuitive and responsive user interface based on the Clarity Design System (Constraint from `.io8codermaster_breakdown.md`).
* Build a scalable architecture capable of handling a growing number of concurrent users and messages (Constraint from `.io8codermaster_breakdown.md`).
* Maintain high levels of security for user data and communications (Constraint from `.io8codermaster_breakdown.md`).
**Initial Risk Assessment (from `.io8codermaster_plan.md`):**
* **Scalability:** Real-time messaging can be resource-intensive. The architecture must be designed to scale horizontally to accommodate increased user load, a critical risk identified in the plan.
* **Performance:** Low latency for message delivery is crucial. The system needs to be optimized for speed and responsiveness, directly impacting user experience.
* **Security:** Authentication, authorization, and data encryption are paramount. Adherence to best practices for data privacy is essential to protect user data.
* **Integration Complexity:** Integrating a new backend and real-time layer with an existing Angular Clarity boilerplate requires careful planning to maintain cohesion and prevent regressions, as noted in the project constraints.
* **Scope Creep:** Managing feature requests to ensure a focused MVP delivery is critical to stay on track with the phased approach outlined in `.io8codermaster_plan.md`.
## User Requirements
Based on the `io8codermaster_breakdown.md` and `io8codermaster_plan.md` for the Messaging App, the high-level user requirements are:
* **User Authentication & Management:** Users need to register, log in, manage their profiles, and see their online status.
* **One-to-One Messaging:** Users must be able to send and receive text messages instantly with another individual user.
* **Message Persistence:** Users need to view their past message conversations.
* **User Interface:** Users expect an intuitive and responsive chat interface to facilitate conversations, consistent with Angular Clarity.
* **Group Messaging (Future):** Users will eventually need to create and participate in group conversations (Milestone 2).
* **Notifications (Future):** Users require real-time notifications for new messages and other relevant events (Milestone 2).
* **Media Sharing (Future):** Users should be able to share various media types within chats (Milestone 2).
## Functional Requirements
*(High-level overview, detailed requirements in requirements_document.md)*
* **User Management System:** Registration, Login, Profile Update, Status Management (Online/Offline).
* **Real-time 1:1 Chat:** Sending and receiving text messages instantly.
* **Message History:** Retrieval and display of past conversations.
* **Chat Interface:** Display of user lists, chat windows, message input, integrated into the Angular Clarity frontend.
* **Group Chat (Phase 2):** Creation, management, and participation in multi-user conversations, aligning with Milestone 2.
* **Notifications (Phase 2):** In-app and potentially push notifications for new messages and events, aligning with Milestone 2.
* **Media Handling (Phase 2):** Upload, display, and management of images and files, aligning with Milestone 2.
## Non-Functional Requirements
*(High-level overview, detailed requirements in requirements_document.md)*
* **Performance:** Low latency for message delivery, fast loading times, as highlighted in the risk assessment.
* **Security:** Robust authentication, authorization, data encryption, input validation, addressing a critical risk.
* **Scalability:** Ability to support a large number of concurrent users and high message volume, as identified in the project constraints and risk assessment.
* **Usability:** Intuitive UI/UX, easy navigation, consistent design (Clarity), leveraging the existing boilerplate.
* **Reliability:** High availability, message delivery guarantees, error handling.
* **Maintainability:** Modular code, clear documentation, ease of debugging, crucial for long-term project success.
* **Real-time:** Immediate message and status updates, a core project requirement.
## User Stories
* **As a Messaging App User,** I want to **register an account** with my email and password, **so that I can start using the application.**
* **Acceptance Criteria:** User can provide email and password, system validates input, account is created, user is automatically logged in or redirected to login.
* **As a Messaging App User,** I want to **log in to my account** securely, **so that I can access my chats and profile.**
* **Acceptance Criteria:** User can provide registered email and password, system authenticates credentials, user gains access to the application, system handles incorrect credentials gracefully.
* **As a Messaging App User,** I want to **view a list of other available users**, **so that I can initiate a conversation.**
* **Acceptance Criteria:** A list of registered users (or contacts) is displayed, indicating their online status.
* **As a Messaging App User,** I want to **send a real-time text message to another user**, **so that I can communicate instantly.**
* **Acceptance Criteria:** User can type a message, send button is available, message appears in the chat window of both sender and receiver immediately.
* **As a Messaging App User,** I want to **receive real-time text messages from other users**, **so that I can engage in conversations.**
* **Acceptance Criteria:** Incoming messages appear instantly in the active chat window.
* **As a Messaging App User,** I want to **view my chat history with another user**, **so that I can refer to past conversations.**
* **Acceptance Criteria:** When a user opens a chat with another individual, previous messages are loaded and displayed in chronological order.
* **As a Messaging App User,** I want to **update my profile information** (e.g., username, profile picture), **so that I can personalize my identity in the app.**
* **Acceptance Criteria:** User can access a profile settings page, modify specified fields, and changes are saved and reflected.
## Business Rules
* **Authentication:** Users must be authenticated to access messaging features. Tokens (e.g., JWT) will be used for session management, as implied by the security requirements in `.io8codermaster_breakdown.md`.
* **Message Length:** Text messages will have a maximum character limit (e.g., 1024 characters) to manage data size and prevent abuse.
* **Usernames:** Usernames must be unique across the system.
* **Email Format:** Registration emails must follow a valid email format for user identification and communication.
* **Real-time Delivery:** Messages sent must be delivered to the recipient(s) in real-time, assuming they are online and connected, a core requirement of the messaging app.
* **Message Persistence:** All sent messages must be stored in the database for history retrieval.
* **Authorization:** Users can only view and interact with their own messages and authorized chat rooms.
```

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@ -135,4 +135,323 @@ Lazy Loading: The architecture strongly encourages the use of lazy-loaded featur
Modular Design: The strict separation of concerns into Core, Shared, and Feature modules makes the codebase easier to manage, test, and scale as the application grows in complexity.
State Management: For applications with complex state, a state management library like NgRx or Akita can be easily integrated into this architecture without requiring significant refactoring.
State Management: For applications with complex state, a state management library like NgRx or Akita can be easily integrated into this architecture without requiring significant refactoring.
---
## ARCHITECTURE UPDATE - 2025-10-10 04:19:30
# Architecture Document
Generated: 2025-10-10T04:04:10.080488
## System Overview - 2025-10-10T04:04:10.080488
The Messaging App will operate as a distributed system, comprising a single-page application (SPA) frontend and a set of backend microservices. The frontend, built on the existing Angular Clarity boilerplate, will provide the user interface and interact with the backend services through both RESTful APIs for data management (e.g., user profiles, message history) and WebSocket connections for real-time communication (e.g., instant message delivery, user presence updates). The backend will handle user authentication, user management, real-time chat logic, message persistence, and potential future features like group chats and media sharing. This architecture ensures high availability, scalability, and responsiveness essential for a modern messaging platform, as per `analysis_document.md` and `requirements_document.md`.
## Architecture Pattern - 2025-10-10T04:04:10.080488
**Frontend:** The frontend will maintain its **Single-Page Application (SPA)** pattern using Angular and the Clarity Design System. It will consume data and real-time events from the backend.
**Backend:** A **Microservices Architecture** pattern will be adopted for the backend to address the scalability and modularity requirements of a real-time messaging application (`NFR-006`). This allows different functionalities (authentication, chat, user management) to be developed, deployed, and scaled independently. An **Event-Driven Architecture** will complement the microservices, leveraging a message broker for asynchronous communication between services and handling high-throughput real-time events. A dedicated **WebSocket Gateway** will abstract real-time complexity and provide a unified entry point for persistent client connections.
**Justification:**
- **Scalability:** Microservices allow individual components, such as the Chat Service or WebSocket Gateway, to be scaled independently based on load, which is critical for handling a growing number of concurrent users and messages (`NFR-002`).
- **Resilience:** Failure in one service (e.g., User Profile) does not necessarily bring down the entire messaging system.
- **Maintainability:** Clear separation of concerns makes the codebase easier to understand, develop, and test.
- **Real-time Capabilities:** The WebSocket Gateway and event-driven communication are specifically designed for low-latency message delivery (`NFR-001`).
## Component Design - 2025-10-10T04:04:10.080488
The system will consist of the following key components:
### Frontend (Angular Clarity SPA)
- **Purpose:** User Interface, user interaction, data display, and real-time event handling.
- **Modules:** Extends the existing `CoreModule`, `SharedModule`, and introduces feature modules for `Auth`, `Chat`, `User Profile`, etc., as per the base boilerplate's modularity (`FR-002` from base `requirements_document.md`).
- **Communication:** Utilizes Angular `HttpClient` for REST API calls and a custom WebSocket service for real-time data exchange.
### Backend Microservices
1. **API Gateway:**
- **Purpose:** Single entry point for all client REST requests. Routes requests to appropriate backend services, handles authentication token validation (`NFR-003`).
- **Responsibilities:** Request routing, load balancing, SSL termination (`NFR-005`).
2. **Authentication Service:**
- **Purpose:** Handles user registration, login, token generation (JWT), and token validation (`FR-001`, `FR-002`).
- **Responsibilities:** Stores user credentials securely, issues and validates JWTs (`NFR-003`).
3. **User Service:**
- **Purpose:** Manages user profiles, user search, and presence status (`FR-003`, `FR-004`, `FR-005`).
- **Responsibilities:** Stores user details, updates online/offline status, publishes status changes to the WebSocket Gateway/Message Broker.
4. **Chat Service:**
- **Purpose:** Manages conversations (1:1 and group), message persistence, and message retrieval (`FR-006`, `FR-008`, `FR-010`, `FR-014`, `NFR-008`).
- **Responsibilities:** Stores message content, conversation metadata, and participant information. Handles message history pagination.
5. **WebSocket Gateway:**
- **Purpose:** Manages persistent WebSocket connections with clients. Routes real-time messages and events to/from clients and the Chat/User/Notification services (`FR-009`).
- **Responsibilities:** Handles WebSocket handshake, connection management, user presence tracking, message broadcasting, and pushing notifications.
6. **Notification Service (Future):**
- **Purpose:** Generates and delivers real-time notifications for new messages or events (`FR-015`, `FR-016`).
- **Responsibilities:** Subscribes to message broker events and pushes notifications via WebSocket Gateway or other channels.
7. **File Storage Service (Future):**
- **Purpose:** Handles secure upload, storage, and retrieval of media files shared in chats (`FR-017`, `FR-018`).
- **Responsibilities:** Integrates with an object storage solution (e.g., S3-compatible).
### Infrastructure Components
- **Database:** Primary data store for users, conversations, and messages.
- **Cache/Real-time Store:** In-memory data store for user presence, session data, and pub/sub capabilities.
- **Message Broker:** Facilitates asynchronous, reliable communication between backend services (e.g., message persistence acknowledgements, notification triggers, presence updates).
## Data Architecture - 2025-10-10T04:04:10.080488
### Database Design
Based on `requirements_document.md` Data Requirements:
- **Primary Database:** A relational database (e.g., PostgreSQL) will store structured data for users, conversations, participants, and messages. This choice provides strong consistency, ACID properties, and flexibility for complex queries needed for chat history and user management.
- **User Table:** `id`, `username`, `email`, `password_hash`, `profile_picture_url`, `status`, `created_at`, `updated_at`.
- **Conversation Table:** `id`, `type` (one_to_one/group), `name` (for group), `created_at`, `updated_at`.
- **ConversationParticipant Table (Join Table):** `conversation_id`, `user_id`, `role` (member/admin), `joined_at`, `last_read_message_id`, `is_active`.
- **Message Table:** `id`, `conversation_id`, `sender_id`, `content`, `type`, `attachment_url`, `sent_at`, `edited_at`, `deleted_at`.
### Data Flow
1. **User Authentication:** Frontend sends login credentials to API Gateway -> Authentication Service -> verifies against database. Returns JWT to frontend.
2. **User/Conversation Management (REST):** Frontend sends HTTP requests (e.g., `GET /api/users/me`, `POST /api/conversations`) to API Gateway -> routed to User Service or Chat Service -> interacts with Primary Database. Responses returned to frontend.
3. **Sending Real-time Messages (WebSocket):** Frontend sends `send_message` event via WebSocket Gateway -> Chat Service receives event -> persists message in Primary Database -> Chat Service publishes `new_message` event to Message Broker -> WebSocket Gateway subscribes to Message Broker and broadcasts `new_message` to relevant clients (`FR-009`).
4. **Receiving Real-time Messages (WebSocket):** WebSocket Gateway receives `new_message` event from Message Broker -> pushes to subscribed clients.
5. **Presence Updates (WebSocket/Cache):** User Service updates `status` in Primary Database and `Cache/Real-time Store`. User Service or WebSocket Gateway publishes `user_status_update` event to Message Broker for broadcasting.
6. **Media Sharing (Future):** Frontend uploads file to File Storage Service (via API Gateway) -> File Storage Service saves to Object Storage and returns `attachment_url` -> `send_message` event then includes this URL.
## API Design - 2025-10-10T04:04:10.080488
Based on `requirements_document.md` Interface Requirements:
### RESTful API (HTTP/HTTPS)
- **Base URL:** `/api/v1`
- **Authentication Endpoints (`/api/v1/auth`):**
- `POST /register`: User registration (`FR-001`).
- `POST /login`: User login, returns JWT (`FR-002`).
- **User Endpoints (`/api/v1/users`):**
- `GET /me`: Retrieve current user profile (`FR-003`).
- `PUT /me`: Update current user profile (`FR-003`).
- `GET /search?query=...`: Search for users (`FR-005`).
- `GET /{userId}/status`: Get specific user's online status (or included in user profile).
- **Conversation Endpoints (`/api/v1/conversations`):**
- `GET /`: Retrieve list of user's conversations (`FR-008` for list context).
- `POST /one-to-one`: Create a 1:1 conversation (`FR-006` context).
- `POST /group`: Create a group conversation (`FR-010`).
- `GET /{conversationId}/messages?limit=...&offset=...`: Retrieve paginated messages for a conversation (`FR-008`, `FR-014`).
- `POST /{conversationId}/members`: Add members to a group chat (Admin only, `FR-011`).
- `DELETE /{conversationId}/members/{userId}`: Remove member from group chat (Admin only, `FR-011`).
### WebSocket API (WSS)
- **Endpoint:** `wss://api.yourdomain.com/ws/chat`
- **Authentication:** JWT token sent in WebSocket handshake (e.g., as a query parameter or header).
- **Client to Server Events:**
- `send_message`: `{ conversationId: UUID, content: string, type: 'text'|'image'|'file', attachmentUrl?: string }` (`FR-006`, `FR-012`, `FR-017`).
- `user_typing`: `{ conversationId: UUID }` (for typing indicators).
- `read_message`: `{ messageId: UUID, conversationId: UUID }` (for read receipts).
- `update_status`: `{ status: 'online'|'offline'|'away' }` (`FR-004`).
- **Server to Client Events:**
- `new_message`: `{ messageId: UUID, conversationId: UUID, senderId: UUID, content: string, type: 'text'|'image'|'file', attachmentUrl?: string, sentAt: Timestamp }` (`FR-007`, `FR-013`).
- `user_status_update`: `{ userId: UUID, status: 'online'|'offline'|'away' }` (`FR-004`, `FR-016`).
- `typing_indicator`: `{ userId: UUID, conversationId: UUID }`.
- `notification`: `{ type: 'new_message'|'user_online', data: {...} }` (`FR-015`, `FR-016`).
- `conversation_update`: `{ conversationId: UUID, type: 'member_added'|'member_removed'|'group_renamed', data: {...} }` (`FR-011`).
## Security Architecture - 2025-10-10T04:04:10.080488
- **Authentication (NFR-003):**
- **JWT-based:** Users authenticate via the REST API, receiving a JSON Web Token (JWT). This token will be sent with subsequent HTTP requests (in `Authorization` header as `Bearer Token`) and for WebSocket connection (`WSS`).
- **Token Expiration & Refresh:** JWTs will have short expiration times, and a refresh token mechanism will be implemented to securely obtain new access tokens without re-authenticating repeatedly.
- **Authorization (NFR-004):**
- **Role-Based Access Control (RBAC):** Backend services will implement RBAC to ensure users only access resources and perform actions for which they have explicit permissions (e.g., `member` vs. `admin` in group chats, access to own messages).
- **Resource Ownership Checks:** All API requests and WebSocket events will include checks to verify that the requesting user has rights to the specific `conversationId` or `userId` resource.
- **Data Encryption (NFR-005):**
- **TLS/SSL (HTTPS/WSS):** All communication between frontend and backend services (both REST and WebSocket) will be encrypted using TLS/SSL to protect data in transit.
- **Password Hashing:** User passwords will be stored as securely hashed values (e.g., using bcrypt) in the database, never in plain text.
- **Input Validation (NFR-006 from base `requirements_document.md`):** All user inputs on both frontend and backend (API layer) will be strictly validated to prevent common vulnerabilities like SQL injection, XSS, and buffer overflows.
- **Rate Limiting:** Implement API rate limiting to prevent abuse and brute-force attacks on authentication endpoints.
- **CORS:** Properly configure Cross-Origin Resource Sharing (CORS) policies to allow requests only from trusted frontend origins.
## Scalability Considerations - 2025-10-10T04:04:10.080488
- **Horizontal Scaling (NFR-006):**
- **Stateless Services:** All backend microservices (Auth, User, Chat) will be designed to be stateless. This allows them to be scaled horizontally by adding more instances behind a load balancer, distributing the load effectively and supporting `NFR-002` (Concurrent Users).
- **WebSocket Gateway:** The WebSocket Gateway will also be horizontally scalable. Solutions like Redis Pub/Sub or a dedicated WebSocket scaling layer will be used to ensure messages are routed to the correct client, regardless of which gateway instance they are connected to.
- **Database Scalability:**
- **PostgreSQL:** Will be configured for high availability with master-replica (read-only) setups to distribute read load. Sharding or partitioning strategies can be explored for extreme data volumes in the future. Connection pooling will optimize database access.
- **Redis:** Crucial for real-time data like user presence. Redis cluster mode will be used to scale Redis horizontally and ensure high availability.
- **Message Broker:** A robust message broker (e.g., RabbitMQ, Kafka) will handle high message throughput and asynchronous processing, decoupling services and buffering spikes in traffic, essential for `NFR-001` (Message Latency).
- **Caching:** Extensive caching (e.g., Redis) will be implemented for frequently accessed, less volatile data (e.g., user profiles, conversation metadata) to reduce database load and improve response times.
- **Load Balancing:** An Nginx-based reverse proxy or cloud provider's load balancer will distribute incoming HTTP and WebSocket traffic across multiple instances of backend services and WebSocket Gateways.
---
## ARCHITECTURE UPDATE - 2025-10-10 04:20:49
# Architecture Document Update: Messaging App
Generated: 2025-10-10T[timestamp]
## System Overview
The Messaging App extends the existing Angular Clarity Boilerplate frontend with a new, dedicated backend. The architecture is a **Client-Server model** with a robust **Real-time Communication Layer**. The Angular frontend provides the user interface for authentication, user management, and interactive chat. The backend, composed of several specialized services, handles business logic, data persistence, and real-time message exchange via WebSockets. This separation ensures scalability, maintainability, and allows independent evolution of frontend and backend components. The system prioritizes low-latency message delivery, secure communication, and horizontal scalability to accommodate a growing user base, as derived from `analysis_document.md` and `requirements_document.md`.
## Architecture Pattern
The core architecture pattern for the Messaging App is a **Hybrid Client-Server / Layered Architecture** with a strong emphasis on a **Publish-Subscribe (Pub/Sub) pattern** for real-time messaging:
1. **Client-Server:** The Angular frontend acts as the client, communicating with the backend API servers.
2. **Layered Backend:** The backend is designed with distinct layers:
* **Presentation/API Gateway:** Handles incoming HTTP/WebSocket requests, routing, and potentially authentication pre-checks.
* **Application Services:** Implements core business logic for user management, conversations, and messages.
* **Real-time Communication Layer:** Dedicated WebSocket server(s) manage persistent connections and message broadcasting.
* **Data Access Layer:** Interfaces with the database for CRUD operations.
3. **Publish-Subscribe (for Real-time):** A message broker (e.g., Redis Pub/Sub) will be used to facilitate real-time message exchange between backend services (e.g., a message service publishing new messages, and multiple WebSocket servers subscribing to these messages to fan-out to connected clients). This pattern is crucial for horizontal scaling of WebSocket servers, addressing NFR-003 (Scalability) from `requirements_document.md`.
## Component Design
The system is composed of the following key components, aligning with `analysis_document.md`'s architectural components and `requirements_document.md`'s data and interface requirements:
### 1. Frontend (Angular Clarity Application)
* **Purpose:** User interface for interaction, leveraging the existing Angular Clarity boilerplate.
* **Modules:**
* `AuthModule`: Handles user registration, login, and session management (communicates with Backend Auth Service).
* `UserModule`: Manages user profiles, search, and presence display (communicates with Backend User Service).
* `ChatModule`: Core messaging functionality, including conversation list, chat window, message input, and real-time message display. (Communicates with Backend Conversation, Message, and WebSocket Services).
* `CoreModule` & `SharedModule`: As per boilerplate, for singleton services (e.g., HTTP interceptors, WebSocket client) and reusable UI components.
* **Key Features:** Responsive UI (NFR-007), Real-time message rendering, User presence display.
### 2. Backend Services
Designed as a set of loosely coupled services, potentially evolving into microservices, to manage core functionalities.
* **2.1. Authentication Service (REST API):**
* **Purpose:** Manages user authentication and authorization (FR-001, FR-002, NFR-003, NFR-004).
* **Responsibilities:** User registration, login, JWT token issuance, validation, and refresh. Password hashing.
* **Interaction:** Exposes REST endpoints (`POST /api/auth/register`, `POST /api/auth/login`) as per `requirements_document.md`.
* **2.2. User Service (REST API):**
* **Purpose:** Manages user profiles and provides user search capabilities (FR-003, FR-005).
* **Responsibilities:** Store and retrieve user profile information, handle profile updates, provide search functionality for other users.
* **Interaction:** Exposes REST endpoints (`GET /api/users/me`, `PUT /api/users/me`, `GET /api/users/search`).
* **2.3. Conversation Service (REST API):**
* **Purpose:** Manages the creation and retrieval of 1:1 and group conversations (FR-009).
* **Responsibilities:** Create new conversations, manage participants (FR-010), retrieve lists of conversations a user is part of.
* **Interaction:** Exposes REST endpoints (`GET /api/conversations`, `POST /api/conversations/one-to-one`, `POST /api/conversations/group`).
* **2.4. Message Service (Internal & REST API):**
* **Purpose:** Persists messages and retrieves chat history (FR-008).
* **Responsibilities:** Store incoming messages from the WebSocket Service, retrieve paginated message history for conversations.
* **Interaction:** Exposes REST endpoint (`GET /api/conversations/{id}/messages`) for history, and an internal API for the WebSocket Service to persist new messages.
* **2.5. Real-time WebSocket Service:**
* **Purpose:** Manages persistent WebSocket connections, handles real-time message delivery, and user presence updates (FR-006, FR-007, FR-009, NFR-001, NFR-007).
* **Responsibilities:** Authenticate WebSocket connections using JWT, receive messages from clients, persist them via Message Service, broadcast messages to relevant recipients, manage user online/offline status, propagate status updates via Redis Pub/Sub.
* **Interaction:** Exposes a WSS endpoint (`wss://api.yourdomain.com/ws/chat`), integrates with Redis for Pub/Sub and presence, and with Message Service for persistence.
### 3. Database
* **Purpose:** Persistent storage for all application data, adhering to `requirements_document.md`'s Data Requirements.
* **Key Entities:** `User`, `Conversation`, `ConversationParticipant`, `Message` (as defined in `requirements_document.md`).
* **Relationships:** One-to-many and many-to-many relationships modeled for users, conversations, and messages.
### 4. Caching / Message Broker (Redis)
* **Purpose:** Enhances real-time performance, manages presence, and facilitates inter-service communication for WebSockets.
* **Responsibilities:** Store user presence status (online/offline), act as a Pub/Sub broker for real-time message distribution across multiple WebSocket service instances, potentially caching frequently accessed data (e.g., user profiles).
### 5. Object Storage (e.g., AWS S3 - for Phase 2 Media Sharing)
* **Purpose:** Store media files (images, documents) for sharing (FR-017, FR-018).
* **Responsibilities:** Provides scalable and secure storage for user-uploaded content. The Message Service will store references (URLs) to these objects.
## Data Flow
1. **User Authentication & Profile Management:**
* Frontend (Angular) sends `POST /api/auth/register` or `POST /api/auth/login` to Backend Auth Service.
* Auth Service interacts with Database to create/verify user credentials. Issues JWT.
* Frontend uses JWT for subsequent requests to Backend User Service (e.g., `GET /api/users/me`, `PUT /api/users/me`), which then interacts with Database.
2. **Real-time Messaging (1:1 & Group Chat):**
* After authentication, Frontend (Angular) establishes a secure WebSocket connection (`wss://api.yourdomain.com/ws/chat`) to the Backend WebSocket Service, providing JWT for authorization.
* **Sending a Message:** Frontend sends `send_message` event over WebSocket to Backend WebSocket Service. WebSocket Service persists message via Message Service (to Database). WebSocket Service then publishes the new message to a Redis Pub/Sub channel.
* **Receiving a Message:** Other instances of Backend WebSocket Service (subscribed to Redis Pub/Sub) receive the published message. They identify relevant connected clients and fan out the `new_message` event over their respective WebSockets to the recipients' Frontends.
* **Message History:** Frontend retrieves older messages via `GET /api/conversations/{id}/messages` from Backend Message Service (REST API), which queries the Database.
3. **User Presence:**
* Frontend sends `user_online`/`user_offline` events (or inferred from WebSocket connection status) to Backend WebSocket Service.
* WebSocket Service updates user status in Redis (for fast retrieval across instances) and potentially Database.
* Status changes are published via Redis Pub/Sub to inform other connected users.
## API Design
As detailed in `requirements_document.md` (Interface Requirements):
* **RESTful API:** For stateless operations such as user registration, login, profile management, and fetching historical data (user lists, chat history).
* Endpoints like `/api/auth/register`, `/api/auth/login`, `/api/users/me`, `/api/conversations`, `/api/conversations/{id}/messages` will be implemented.
* Communication will be JSON over HTTPS.
* **WebSocket API:** For real-time, bidirectional communication.
* A single `wss://api.yourdomain.com/ws/chat` endpoint will be used.
* Events like `send_message`, `new_message`, `user_status_update`, `typing_indicator` will be exchanged.
* Payloads will be JSON.
## Security Architecture
Addressing NFR-002 (Security) from `requirements_document.md`:
* **Authentication:**
* **JWT (JSON Web Tokens):** Used for authenticating REST API requests and authorizing WebSocket connections. Tokens will have short lifespans with a refresh token mechanism.
* **Password Hashing:** User passwords will be hashed and salted using strong, industry-standard algorithms (e.g., bcrypt) before storage in the database.
* **Authorization:**
* **Role-Based Access Control (RBAC):** Implemented at the backend for sensitive actions (e.g., group administration (FR-011), accessing message history (NFR-004)).
* **Scope-Based Authorization:** JWTs will contain claims to define the scope of a user's access.
* **Data Encryption:**
* **In-transit:** All HTTP and WebSocket communication will be encrypted using **TLS/SSL (HTTPS/WSS)** (NFR-005).
* **At-rest:** Database encryption and secure storage practices will be applied, especially for media files (if applicable, using encrypted storage services).
* **Input Validation:** Comprehensive input validation will be implemented on all backend API endpoints to prevent common vulnerabilities such as XSS, SQL injection, and buffer overflows (NFR-002).
* **Session Management:** Secure session management for JWTs, including proper storage (e.g., HttpOnly cookies) and invalidation on logout.
## Scalability Considerations
Addressing NFR-003 (Scalability) from `requirements_document.md`:
* **Horizontal Scaling:**
* **Stateless Services:** Backend API services will be designed as stateless entities, allowing them to be horizontally scaled by adding more instances behind a load balancer.
* **WebSocket Service Scaling:** Multiple instances of the WebSocket Service can run concurrently. Redis Pub/Sub acts as a backbone to distribute messages across these instances, ensuring all clients receive messages regardless of which WebSocket server they are connected to.
* **Load Balancing:** A load balancer (e.g., Nginx, or cloud-native solutions) will distribute incoming HTTP and WebSocket traffic across multiple backend service instances.
* **Database Scalability:**
* **Read Replicas:** PostgreSQL can be configured with read replicas to offload read-heavy operations (e.g., fetching chat history) from the primary database instance.
* **Connection Pooling:** Efficient database connection pooling will be used by backend services to manage database load.
* **Sharding (Future):** For extremely high message volumes, message data might be sharded across multiple database instances based on conversation ID or user ID.
* **Caching:** Redis will be used for caching frequently accessed data (e.g., user profiles, online status) to reduce database load and improve response times.
* **Asynchronous Processing:** Backend operations, especially for media sharing (Phase 2), will leverage asynchronous processing to avoid blocking the main request/response cycle, potentially using background task queues (e.g., Celery with Redis).
---
## ARCHITECTURE UPDATE - 2025-10-10 04:21:29
# Architecture Document Update
Generated: 2025-10-10T04:20:00.000000
## Data Architecture Refinement
Building upon the initial data architecture, a deeper dive into indexing and read strategies is essential to meet performance requirements (NFR-001) and efficient message history retrieval (FR-007):
* **Message Indexing:** For the `Message` entity, robust indexing will be critical. Indices will be created on `conversation_id`, `sender_id`, and `sent_at` to facilitate rapid querying of messages within a conversation, retrieving messages by a specific sender, and efficient chronological sorting for chat history. A compound index on `(conversation_id, sent_at)` will be highly beneficial for paginated history retrieval, addressing `FR-008` (View Message History) and `FR-014` (View Group Message History).
* **User/Conversation Lookups:** Indices on `User.username` and `User.email` will speed up login and user search operations (FR-001, FR-002, FR-005). For `ConversationParticipant`, indexes on `(user_id, conversation_id)` and `(conversation_id, user_id)` will optimize fetching all conversations for a user and all participants for a conversation.
* **Read Status Tracking:** The `ConversationParticipant.last_read_message_id` will be actively updated by the frontend via the WebSocket Service whenever a user views a conversation, providing real-time read receipts (an implicit feature derived from data model, enhancing user experience).
* **Database Partitioning (Future consideration):** For extreme scale and very high message volumes, tables like `Message` could be considered for partitioning by `conversation_id` or `sent_at` range to distribute load and improve query performance, directly supporting NFR-006 (Scalability).
## Message Queuing and Offline Delivery Strategy
While Redis Pub/Sub efficiently handles real-time message fan-out, a more robust strategy is needed for guaranteed message delivery, especially for offline users, addressing NFR-005 (Reliability).
* **Redis Streams/Lists for Offline Messages:** Instead of solely relying on Pub/Sub, the WebSocket Service will leverage Redis Streams or Lists to temporarily store messages for users who are currently offline or disconnected. When a user reconnects, the WebSocket Service will first check for any pending messages in their dedicated Redis queue/stream before subscribing them to real-time updates. This ensures messages are delivered even if the recipient was not connected at the time of sending.
* **Background Processing Queue (Future for Phase 2):** For computationally intensive tasks, particularly related to Phase 2 features like media processing (FR-017, FR-018) or complex notification logic, a dedicated background task queue (e.g., using Celery with Redis as a broker) could be introduced. This would decouple the main request/response flow, improving responsiveness and system resilience.
## Deployment and Operational Architecture
To ensure the system meets its Non-Functional Requirements, especially NFR-005 (Reliability), NFR-006 (Maintainability), and NFR-003 (Scalability), a robust deployment and operational strategy is critical.
* **Container Orchestration:** Leveraging Docker Compose for local development and potentially Kubernetes (or AWS ECS/Fargate) for production ensures consistent environments and simplifies scaling. Backend services will be deployed as separate containers, managed by the orchestrator.
* **Monitoring and Alerting:** Comprehensive monitoring will be implemented across all layers. Metrics (CPU, memory, network I/O, message delivery latency, API response times) will be collected from frontend (e.g., web vitals), backend services, databases, and the Redis instance. Alerts will be configured for critical thresholds and errors to ensure proactive issue resolution.
* **Centralized Logging:** All application logs (frontend, backend, Nginx) will be aggregated into a centralized logging system (e.g., an ELK stack or Grafana Loki). This enables easy debugging, auditing, and performance analysis, crucial for maintaining system health (NFR-006).
* **Automated Backups:** Regular automated backups of the PostgreSQL database will be implemented to ensure data durability and recovery capabilities.
## Security Architecture Enhancements
To further reinforce NFR-002 (Security), additional considerations will be implemented:
* **Rate Limiting:** Implement rate limiting on authentication and registration endpoints at the Nginx level and within FastAPI to prevent brute-force attacks and abuse.
* **Content Security Policy (CSP):** Configure a strict Content Security Policy for the Angular frontend to mitigate XSS attacks.
* **Environment Variable Management:** Securely manage sensitive configurations (database credentials, API keys, JWT secrets) using environment variables or a secrets management service (e.g., AWS Secrets Manager, HashiCorp Vault) in production.
* **Regular Security Audits:** Conduct periodic security audits and vulnerability assessments to identify and remediate potential weaknesses.

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@ -59,4 +59,495 @@ The following features and functionalities are explicitly out of scope for the b
- **Authentication/Authorization Logic:** While the architecture supports the implementation of security features, no pre-built authentication or authorization logic is included.
- **State Management:** The boilerplate does not include a state management library (e.g., NgRx, Akita) by default, allowing developers to choose the best solution for their needs.
- **Business Logic:** No specific business logic or application features are included beyond the basic structural components.
- **CI/CD Pipelines:** While the project is ready for CI/CD, no pre-configured pipelines are included.
- **CI/CD Pipelines:** While the project is ready for CI/CD, no pre-configured pipelines are included.
---
## PRD UPDATE - 2025-10-10 04:23:38
# Product Requirements Document (PRD)
## Generated: 2025-10-10T04:22:00.000000
## 1. Executive Summary
### Update: 2025-10-10T04:22:00.000000
The Messaging App project aims to deliver a robust, real-time communication platform built by extending an existing Angular Clarity boilerplate for the frontend and developing a new, dedicated Python FastAPI backend. The initial MVP will focus on core functionalities including secure user authentication, real-time one-to-one text messaging, and persistent message history. The project emphasizes scalability, security, and a seamless user experience, addressing the need for instant and reliable digital communication as outlined in the `analysis_document.md`.
## 2. Product Vision & Strategy
### Update: 2025-10-10T04:22:00.000000
**Product Vision:** To be a secure, highly performant, and intuitive real-time messaging application that enables effortless communication between users, built on modern, scalable web technologies.
**Strategic Goals:**
1. **Achieve Core Messaging MVP:** Successfully launch a stable and functional platform for authenticated users to engage in one-to-one real-time text chats with message persistence.
2. **Ensure Scalability & Performance:** Design and implement an architecture capable of supporting a growing number of concurrent users and high message volumes with low latency (NFR-PM-001, NFR-PM-002).
3. **Prioritize Security:** Implement robust authentication, authorization, and data encryption to protect user data and communications (NFR-PM-003).
4. **Leverage Existing Assets:** Seamlessly integrate with and extend the Angular Clarity boilerplate to provide a consistent and modern UI/UX.
5. **Enable Future Expansion:** Lay a flexible architectural foundation for easy integration of future features like group chat, media sharing, and notifications.
**Success Metrics (KPIs):** (See Section 11 for detailed KPIs)
## 3. Target Users & Personas
### Update: 2025-10-10T04:22:00.000000
**Primary Target Users:** Individuals and small teams who require a reliable, instant, and secure digital communication tool. These users value privacy, real-time interaction, and an intuitive user interface. (Referenced: `analysis_document.md` User Requirements)
**Persona: Emily, The Connected Professional**
* **Demographics:** 32 years old, Marketing Manager, tech-savvy.
* **Goals:** Stay in touch with colleagues and clients instantly, share quick updates, maintain a professional digital presence.
* **Pain Points:** Existing tools are often clunky, not real-time enough, or lack a clean interface. Concerned about data privacy and security with public messaging apps.
* **Needs:** Fast and reliable one-to-one messaging, clear presence indicators, easy access to chat history, secure communication. A clean, intuitive interface that doesn't distract.
* **User Journey (MVP Focus - Exemplar):**
1. **Discover & Register:** Emily hears about the app, visits the website, registers a new account using her work email.
2. **Log In:** Logs in securely using her credentials.
3. **Find Colleague:** Searches for her colleague, Mark, by his username or email.
4. **Initiate Chat:** Clicks on Mark's name to open a new chat window.
5. **Send Message:** Types a message and sees it delivered instantly.
6. **Receive Reply:** Receives Mark's reply instantly.
7. **View History:** Scrolls up to see previous messages in her conversation with Mark.
## 4. Problem Statement
### Update: 2025-10-10T04:22:00.000000
Users require a digital communication platform that offers **instant, reliable, and secure messaging capabilities**, yet existing solutions often fall short in one or more areas such as user-friendliness, consistency in real-time delivery, or robust data privacy. The challenge is to provide a seamless user experience that fosters efficient interaction while ensuring the underlying architecture is scalable and secure enough to handle the demands of modern real-time communication. (Referenced: `analysis_document.md` Problem Statement)
## 5. Solution Overview
### Update: 2025-10-10T04:22:00.000000
The Messaging App will be a **real-time, full-stack application** comprising a responsive Angular Clarity frontend and a high-performance Python FastAPI backend, supported by PostgreSQL for persistent data and Redis for real-time operations. The solution will provide:
* **Secure User Management:** Registration, login (JWT-based), profile management, and user search.
* **Real-time One-to-One Messaging:** Instant delivery and display of text messages via WebSockets.
* **Persistent Chat History:** Storage and retrieval of all messages for ongoing conversations.
* **Intuitive User Interface:** A clean, consistent, and responsive UI leveraging the VMware Clarity Design System.
* **Scalable Architecture:** A modular, microservices-oriented backend designed for horizontal scaling to handle increasing user load and message volume. (Referenced: `analysis_document.md`, `architecture_document.md`)
## 6. Functional Requirements
### Update: 2025-10-10T04:22:00.000000
**6.1. User Authentication & Profile Management (MVP)**
* FR-PM-001: User Registration: Allow new users to create an account with a unique username, email, and password.
* FR-PM-002: User Login/Logout: Enable registered users to securely log in and out of the application.
* FR-PM-003: User Profile View/Edit: Allow users to view and update their profile information (e.g., username, optional profile picture).
* FR-PM-004: User Presence Display: Display the online/offline status of users to their contacts.
* FR-PM-005: User Search: Enable users to search for other registered users by username or email.
**6.2. One-to-One Real-time Messaging (MVP)**
* FR-PM-006: Conversation List: Display a list of all active one-to-one conversations for the logged-in user.
* FR-PM-007: Send Text Message (1:1): Allow a user to compose and send a text message to another specific user in real-time.
* FR-PM-008: Receive Text Message (1:1): Ensure incoming text messages from another user are displayed in real-time.
* FR-PM-009: Message History Retrieval (1:1): Automatically load and display historical messages for a one-to-one conversation.
**6.3. Group Chat (Phase 3)**
* FR-PM-010: Create Group Chat: Allow users to create new group conversations and invite other users.
* FR-PM-011: Manage Group Members: Enable group administrators to add or remove members from a group chat.
* FR-PM-012: Send Text Message (Group): Allow users to send text messages within a group conversation.
* FR-PM-013: Receive Text Message (Group): Ensure incoming text messages within a group are displayed in real-time for all group members.
* FR-PM-014: Message History Retrieval (Group): Automatically load and display historical messages for a group conversation.
**6.4. Notifications (Phase 3)**
* FR-PM-015: New Message Notification: Alert users to new messages when they are not actively viewing the conversation.
* FR-PM-016: User Status Notification: Notify users when a contact comes online or goes offline (optional).
**6.5. Media Sharing (Phase 3)**
* FR-PM-017: Share Image/File: Allow users to upload and share images or other files within a chat.
* FR-PM-018: View Shared Media: Display shared images/files appropriately within the chat interface.
## 7. Non-Functional Requirements
### Update: 2025-10-10T04:22:00.000000
* **NFR-PM-001: Performance:** Message delivery latency should be consistently below 500ms under normal load. Initial page load for the frontend should be optimized for speed. Backend API response times should be under 200ms. (Referenced: `analysis_document.md` NFR-001, `architecture_document.md` Scalability Considerations).
* **NFR-PM-002: Scalability:** The system must support at least 1,000 concurrent users for the MVP, with architectural provisions to scale to 10,000+. Backend services must be horizontally scalable. (Referenced: `analysis_document.md` NFR-002, `architecture_document.md` Scalability Considerations).
* **NFR-PM-003: Security:** Implement JWT-based authentication for all API and WebSocket connections. User passwords must be securely hashed. All communications (HTTP/WebSocket) must be encrypted via TLS/SSL (HTTPS/WSS). Comprehensive input validation to prevent common attacks. (Referenced: `analysis_document.md` NFR-003, NFR-004, NFR-005, NFR-006; `architecture_document.md` Security Architecture).
* **NFR-PM-004: Reliability:** Messages sent should be reliably delivered and persisted. The system should gracefully handle network interruptions and service failures with appropriate error handling and user feedback. An offline message delivery mechanism (using Redis Streams/Lists) must be in place. (Referenced: `analysis_document.md` NFR-011, NFR-012; `architecture_document.md` Data Architecture Refinement).
* **NFR-PM-005: Usability:** The user interface, built with Angular Clarity, must be intuitive and responsive across various screen sizes and devices. (Referenced: `analysis_document.md` NFR-007, NFR-009).
* **NFR-PM-006: Maintainability:** The codebase must be modular, well-documented, and adhere to industry best practices to facilitate easy updates and feature additions. (Referenced: `analysis_document.md` NFR-013, NFR-014).
* **NFR-PM-007: Real-time:** Core messaging functionalities (sending/receiving messages, presence updates) must operate in real-time with minimal perceived delay. (Core project requirement).
## 8. Epic Stories
### Update: 2025-10-10T04:22:00.000000
### Epic 1: User Authentication & Profile Management (MVP)
**Epic Description:** Enable users to securely create and manage their accounts, including registration, login, profile updates, and the ability to find other users for communication.
**Business Value:** Provides foundational access control and identity management, essential for any multi-user application. Allows users to personalize their experience and connect with others.
**Acceptance Criteria:**
- [ ] New users can successfully register and log in.
- [ ] Existing users can securely log in and access their dashboard.
- [ ] Users can view and update their profile information.
- [ ] Users can search for and find other registered users.
- [ ] User online/offline status is accurately displayed.
**User Stories:**
- **US-001:** Register an account
- **As a** new user
- **I want to** register an account with my email and password
- **So that** I can start using the messaging app.
- **Acceptance Criteria:**
- [ ] The system validates required inputs (unique email, strong password).
- [ ] My account is created successfully.
- [ ] I am automatically logged in or redirected to the login page upon successful registration.
- **Story Points:** 5
- **Priority:** High
- **US-002:** Log in securely
- **As a** registered user
- **I want to** log in to my account securely
- **So that** I can access my chats and profile.
- **Acceptance Criteria:**
- [ ] I can enter my registered email and password.
- [ ] Upon valid credentials, I am authenticated and granted access.
- [ ] Upon invalid credentials, I receive an appropriate error message.
- [ ] My session is secured using JWT.
- **Story Points:** 3
- **Priority:** High
- **US-003:** See my online/offline status
- **As a** user
- **I want to** see my online/offline status, and have others see it
- **So that** others know my availability for communication.
- **Acceptance Criteria:**
- [ ] My status is shown as 'Online' when I am active in the app.
- [ ] My status changes to 'Offline' when I log out or am inactive.
- [ ] I can see the online/offline status of other users in my contact list/conversation list.
- **Story Points:** 5
- **Priority:** High
- **US-004:** Update my profile information
- **As a** user
- **I want to** update my profile information (e.g., username, optional profile picture)
- **So that** I can personalize my identity in the app.
- **Acceptance Criteria:**
- [ ] I can navigate to a profile settings page.
- [ ] I can modify my username (if allowed).
- [ ] I can upload/change my profile picture (if implemented, Phase 3).
- [ ] Changes are saved and reflected in my profile and to other users.
- **Story Points:** 5
- **Priority:** Medium
- **US-013:** Search for other users
- **As a** user
- **I want to** search for other users by username or email
- **So that** I can find people to chat with.
- **Acceptance Criteria:**
- [ ] I can enter a search query in a dedicated search bar.
- [ ] The system returns a list of matching users in real-time (or near real-time).
- [ ] I can initiate a new conversation directly from the search results.
- **Story Points:** 5
- **Priority:** High
### Epic 2: One-to-One Real-time Messaging (MVP)
**Epic Description:** Enable users to engage in instant, private conversations with another user, including sending and receiving text messages and viewing conversation history.
**Business Value:** Provides the core utility of a messaging application, facilitating direct and efficient communication between individuals, which is the primary value proposition of the MVP.
**Acceptance Criteria:**
- [ ] Users can view a list of their one-to-one conversations.
- [ ] Users can send and receive text messages instantly.
- [ ] Chat history is accurately displayed and persistent.
**User Stories:**
- **US-005:** View a list of existing conversations
- **As a** user
- **I want to** view a list of my existing conversations
- **So that** I can quickly resume chatting with individuals.
- **Acceptance Criteria:**
- [ ] A list of my 1:1 conversations is displayed on the main chat screen.
- [ ] Each conversation entry shows the name of the other participant.
- [ ] Each conversation entry shows a preview of the last message exchanged.
- **Story Points:** 5
- **Priority:** High
- **US-006:** Send a real-time text message
- **As a** user
- **I want to** send a real-time text message to another user
- **So that** I can communicate instantly.
- **Acceptance Criteria:**
- [ ] I can type a message in an active chat window.
- [ ] I can press 'Send' or 'Enter' to dispatch the message.
- [ ] The message appears in my chat window immediately after sending.
- [ ] The message is delivered to the recipient's active chat window in real-time.
- **Story Points:** 8
- **Priority:** High
- **US-007:** Receive real-time text messages
- **As a** user
- **I want to** receive real-time text messages from other users
- **So that** I can engage in conversations.
- **Acceptance Criteria:**
- [ ] Incoming messages appear instantly in my active chat window.
- [ ] Messages are correctly attributed to the sender.
- **Story Points:** 8
- **Priority:** High
- **US-008:** View chat history
- **As a** user
- **I want to to** see my chat history with another user
- **So that** I can recall past conversations.
- **Acceptance Criteria:**
- [ ] When I open a 1:1 chat, previous messages are loaded and displayed chronologically.
- [ ] The chat history loads efficiently, even for long conversations.
- [ ] Messages are persisted and available across sessions.
- **Story Points:** 8
- **Priority:** High
### Epic 3: Group Chat Capabilities (Phase 3)
**Epic Description:** Extend the messaging functionality to allow users to create and participate in multi-person conversations.
**Business Value:** Enhances collaboration and allows for broader communication, increasing the utility and stickiness of the application.
**Acceptance Criteria:**
- [ ] Users can create new group chats.
- [ ] Group administrators can manage group members.
- [ ] Users can send and receive messages within group chats.
- [ ] Group chat history is accessible and persistent.
**User Stories:**
- **US-009:** Create a new group chat
- **As a** user
- **I want to** create a new group chat with selected users
- **So that** I can communicate with multiple people at once.
- **Acceptance Criteria:**
- [ ] I can select multiple users to form a group.
- [ ] I can name the group chat.
- [ ] The group chat is created, and all selected users are added as members.
- **Story Points:** 8
- **Priority:** Medium
- **US-010:** Add/remove members from a group chat
- **As a** group administrator
- **I want to** add or remove members from a group chat I administer
- **So that** I can manage group participation.
- **Acceptance Criteria:**
- [ ] Only group administrators can add new members to a group.
- [ ] Only group administrators can remove existing members from a group.
- [ ] All group members are notified of member changes.
- **Story Points:** 8
- **Priority:** Medium
- **US-011:** Send a text message to a group
- **As a** user
- **I want to** send a text message to a group
- **So that** I can communicate with all group members simultaneously.
- **Acceptance Criteria:**
- [ ] I can compose and send a message within an active group chat.
- [ ] The message is delivered to all active members of the group in real-time.
- **Story Points:** 5
- **Priority:** Medium
- **US-012:** View group message history
- **As a** user
- **I want to** view the message history of a group chat
- **So that** I can catch up on past conversations with the group.
- **Acceptance Criteria:**
- [ ] When I open a group chat, previous messages are loaded and displayed chronologically.
- [ ] The history loads efficiently for groups with many messages and members.
- **Story Points:** 5
- **Priority:** Medium
### Epic 4: Enhanced Communication Features (Phase 3)
**Epic Description:** Introduce advanced features like notifications and media sharing to enrich the user's communication experience.
**Business Value:** Improves user engagement by ensuring important messages are not missed and by enabling more expressive and informative conversations.
**Acceptance Criteria:**
- [ ] Users receive real-time notifications for new messages.
- [ ] Users can share various media types within chats.
**User Stories:**
- **US-014:** Receive new message notification
- **As a** user
- **I want to** receive a real-time notification when I get a new message
- **So that** I don't miss important communications, even if I'm not actively in the chat.
- **Acceptance Criteria:**
- [ ] A visual (e.g., badge count) and/or audible notification is triggered for new messages when the app is in the background or the chat is not open.
- [ ] Clicking the notification takes me to the relevant chat.
- **Story Points:** 5
- **Priority:** Medium
- **US-015:** Share images/files in a chat
- **As a** user
- **I want to** share images/files in a chat
- **So that** I can easily exchange visual or document content with other users.
- **Acceptance Criteria:**
- [ ] I can select an image or file from my device to upload.
- [ ] The selected media is uploaded to storage.
- [ ] The media is displayed appropriately within the chat window (e.g., image thumbnail, file link).
- [ ] Other users can view/download the shared media.
- **Story Points:** 13
- **Priority:** Medium
## 9. User Interface Requirements
### Update: 2025-10-10T04:22:00.000000
* **UI Framework Consistency:** Adhere strictly to the VMware Clarity Design System for all UI components, styling, and visual language to ensure a consistent and enterprise-grade look and feel. (Referenced: `analysis_document.md` Project Overview, `tech_stack_document.md` Frontend Technologies)
* **Responsiveness:** The application's UI must be fully responsive, adapting seamlessly to various screen sizes, from mobile devices to large desktop monitors (NFR-PM-005).
* **Intuitive Layout:** Provide a clear and easy-to-navigate layout, including a distinct area for conversation lists, active chat windows, and user profiles. (Referenced: `analysis_document.md` User Requirements).
* **Chat Experience:** The chat interface should feature:
* A prominent message input field.
* Clear display of sender, message content, and timestamp.
* Visual indicators for online status and potentially typing status.
* Efficient scrolling for message history.
* **Accessibility:** Ensure the UI components meet basic accessibility standards (e.g., keyboard navigation, screen reader compatibility), as promoted by the Clarity Design System.
* **Error Feedback:** Provide clear and user-friendly error messages and feedback for actions like failed login, message sending errors, etc.
## 10. Technical Requirements
### Update: 2025-10-10T04:22:00.000000
* **Frontend (Angular Clarity):**
* Extend the provided Angular Clarity boilerplate with new feature modules (Auth, User, Chat).
* Utilize Angular's HttpClient for REST API communication and a dedicated WebSocket service for real-time data.
* Implement RxJS for reactive programming and efficient state management. (Referenced: `tech_stack_document.md` Frontend Technologies).
* **Backend (Python FastAPI):**
* Develop a Python FastAPI application for RESTful APIs (authentication, user management, conversation management, message history retrieval).
* Implement a separate WebSocket endpoint within FastAPI/Starlette to handle real-time messaging and user presence.
* Utilize SQLAlchemy for ORM interactions with PostgreSQL and Alembic for database migrations. (Referenced: `tech_stack_document.md` Backend Technologies).
* **Database (PostgreSQL & Redis):**
* PostgreSQL as the primary relational database for persistent storage of users, conversations, and messages.
* Redis for real-time user presence, caching, and a Pub/Sub mechanism to scale WebSocket services. (Referenced: `tech_stack_document.md` Database Technologies).
* **Security:**
* Implement JWT for secure API and WebSocket authentication.
* Ensure TLS/SSL encryption for all network communications (HTTPS/WSS).
* Implement server-side input validation and data sanitization. (Referenced: `architecture_document.md` Security Architecture).
* **Deployment:**
* Containerize all services using Docker.
* Use Docker Compose for local development and potential staging environments.
* Design for Kubernetes/ECS deployment in production for horizontal scaling. (Referenced: `tech_stack_document.md` Infrastructure, `architecture_document.md` Scalability Considerations).
* **API Design:** Follow a RESTful pattern for stateless operations and a WebSocket event-driven pattern for real-time communication. (Referenced: `architecture_document.md` API Design).
## 11. Success Metrics & KPIs
### Update: 2025-10-10T04:22:00.000000
* **User Registration Rate:** Percentage of visitors who complete registration.
* **Daily Active Users (DAU) / Monthly Active Users (MAU):** Number of unique users interacting with the app daily/monthly, a key indicator of product stickiness and value.
* **Average Message Latency:** Average time taken for a message to be delivered and displayed (target < 500ms) - directly measures NFR-PM-001.
* **Backend API Response Time:** Average response time for core API endpoints (target < 200ms) - also related to NFR-PM-001.
* **Uptime/Availability:** Percentage of time the core services are operational (target 99.9%) - directly measures NFR-PM-004.
* **User Retention Rate:** Percentage of users who return to the app after a specified period (e.g., 7-day, 30-day) - indicates long-term user satisfaction.
* **Error Rate:** Frequency of critical errors in frontend and backend (target < 0.1%) - indicates system stability and reliability.
* **Feature Adoption:** (Post-MVP) Percentage of users utilizing group chat, media sharing, or notification features after their release.
## 12. Risk Assessment
### Update: 2025-10-10T04:22:00.000000
* **Scalability Challenges (High):** Real-time messaging can be resource-intensive. High concurrent user numbers or message volumes could strain the system. (Identified in `analysis_document.md` and `architecture_document.md`)
* **Mitigation:** Microservices architecture with stateless design; horizontal scaling for all backend services and WebSocket Gateways; leveraging Redis Pub/Sub for efficient message fan-out; database read replicas; load balancing.
* **Performance Bottlenecks (High):** Ensuring low message latency and responsive UI across varying network conditions is critical. (Identified in `analysis_document.md`)
* **Mitigation:** Extensive caching (Redis); optimized database queries with proper indexing; efficient WebSocket protocol usage; frontend performance optimization (lazy loading, AOT compilation); robust monitoring for early detection.
* **Security Vulnerabilities (High):** Authentication bypasses, data breaches, message interception are severe risks. (Identified in `analysis_document.md` and `architecture_document.md`)
* **Mitigation:** JWT with refresh token mechanism; strong password hashing; strict TLS/SSL for all communications; comprehensive input validation; RBAC for authorization; regular security audits; secure secret management.
* **Integration Complexity (Medium):** Integrating a new Python backend with an existing Angular Clarity boilerplate, especially with real-time WebSockets, can be challenging. (Identified in `analysis_document.md`)
* **Mitigation:** Clear API contracts (REST & WebSocket); phased integration starting with MVP; thorough testing of frontend-backend communication; well-defined module boundaries.
* **Scope Creep (Medium):** Tendency to add more features beyond the MVP, delaying core functionality delivery. (Identified in `analysis_document.md`)
* **Mitigation:** Strict adherence to MVP definition for Phase 2; clear prioritization of Epics/User Stories; frequent communication with stakeholders about scope; timeboxing feature development.
* **Database Performance (Medium):** Unoptimized queries or large data volumes could lead to slow message history retrieval or user lookups.
* **Mitigation:** Strategic indexing on `conversation_id`, `sender_id`, `sent_at`; pagination for history retrieval; database connection pooling; consider database partitioning for extreme scale.
## 13. Timeline & Milestones
### Update: 2025-10-10T04:22:00.000000
This project will follow a phased approach, aligning with the `analysis_document.md` updates, with continuous iteration within each phase. (Estimated durations are approximate and subject to team velocity and complexity).
* **Phase 1: Discovery & Architecture (Completed - Initial Stage)**
* **Goal:** Establish foundational project understanding and technical blueprints.
* **Deliverables:** `analysis_document.md`, `architecture_document.md`, `tech_stack_document.md`, Initial `prd_document.md`.
* **Phase 2: Core Messaging MVP Development (Current Focus - Est. 8-12 weeks)**
* **Goal:** Deliver a fully functional 1:1 messaging system with secure authentication and message persistence.
* **Key Milestones:**
* **M2.1:** User Auth & Profile Backend APIs (Register, Login, Profile CRUD, User Search)
* **M2.2:** Frontend Auth & Profile UI Integration
* **M2.3:** Core 1:1 Messaging Backend (Message persistence, Real-time via WebSockets)
* **M2.4:** Frontend 1:1 Chat UI Integration (Conversation list, Chat window, Send/Receive, History display)
* **M2.5:** Basic User Presence (Online/Offline status)
* **M2.6:** Dockerization for MVP components & local dev setup.
* **Phase 3: Feature Expansion & Quality Assurance (Est. 6-10 weeks)**
* **Goal:** Implement advanced messaging features and ensure high quality.
* **Key Milestones:**
* **M3.1:** Group Chat Backend & Frontend Integration
* **M3.2:** Notification System Implementation
* **M3.3:** Media Sharing Backend & Frontend Integration
* **M3.4:** Comprehensive Testing (Unit, Integration, E2E, Performance, Security)
* **Phase 4: Deployment Readiness & Operations (Est. 4-6 weeks)**
* **Goal:** Prepare for production deployment and establish operational excellence.
* **Key Milestones:**
* **M4.1:** CI/CD Pipeline Setup (Build, Test, Deploy)
* **M4.2:** Production Environment Configuration (Kubernetes/ECS deployment, Nginx)
* **M4.3:** Monitoring & Logging Stack Implementation (Prometheus, Grafana, Loki/ELK)
* **M4.4:** Security Hardening & Penetration Testing
## 14. Dependencies & Assumptions
### Update: 2025-10-10T04:22:00.000000
**Dependencies:**
* **Existing Angular Clarity Boilerplate:** Frontend development is dependent on the stable and functional base provided by the boilerplate. No breaking changes or regressions should be introduced to the core boilerplate structure. (Referenced: `analysis_document.md` Constraints)
* **External Cloud Services:** Availability and configuration of cloud services (e.g., PostgreSQL, Redis, Object Storage like AWS S3 for Phase 3) are critical.
* **Team Skills:** Availability of developers proficient in Angular, TypeScript, Python, FastAPI, WebSockets, PostgreSQL, Docker, and CI/CD practices.
**Assumptions:**
* **API Stability:** Backend API contracts (REST and WebSocket) will remain stable once defined for each phase, minimizing refactoring on the frontend.
* **Development Environment:** Developers have access to suitable development environments (Node.js, Python, Docker, IDEs).
* **Performance Expectations:** Initial performance targets are achievable with the chosen tech stack and architecture; significant re-architecture will not be required for the MVP.
* **Security Best Practices:** The development team will adhere to security best practices throughout the development lifecycle (e.g., secure coding, regular dependency updates).
* **Feedback Loop:** Timely feedback from stakeholders will be available to facilitate iterative development and prioritization decisions.
---
## PRD UPDATE - 2025-10-10 04:24:22
### Update: 2025-10-10T04:30:00.000000
## 6. Functional Requirements
*(No new top-level functional requirements added, detailed in Epic Stories below.)*
## 7. Non-Functional Requirements
### Update: 2025-10-10T04:30:00.000000
* **NFR-PM-003: Security:** ... Furthermore, a strict **Content Security Policy (CSP)** must be implemented for the frontend to mitigate XSS attacks. Rate limiting will be applied to authentication and registration endpoints to prevent brute-force attacks. (Referenced: `architecture_document.md` Security Architecture Enhancements).
## 8. Epic Stories
### Update: 2025-10-10T04:30:00.000000
### Epic 2: One-to-One Real-time Messaging (MVP)
**User Stories:**
- **US-006:** Send a real-time text message
- **Acceptance Criteria:**
- [ ] The message content does not exceed 2000 characters.
- [ ] ... (existing criteria)
### Epic 3: Group Chat Capabilities (Phase 3)
**User Stories:**
- **US-009:** Create a new group chat
- **Acceptance Criteria:**
- [ ] I can select multiple users to form a group (minimum of 2 users excluding myself).
- [ ] ... (existing criteria)
- **US-011:** Send a text message to a group
- **Acceptance Criteria:**
- [ ] The message content does not exceed 2000 characters.
- [ ] ... (existing criteria)
### Epic 4: Enhanced Communication Features (Phase 3)
**User Stories:**
... (existing user stories US-014, US-015)
- **US-016:** See when my message has been read
- **As a** user
- **I want to** see when my message has been read by the recipient(s) in a conversation
- **So that** I know my message has been acknowledged.
- **Acceptance Criteria:**
- [ ] A visual indicator (e.g., a double-tick or an 'Read' status) appears next to my sent message once all recipients in a 1:1 chat have viewed it.
- [ ] For group chats, a visual indicator shows how many members have read the message, or who specifically has read it upon hovering/clicking.
- **Story Points:** 8
- **Priority:** Medium
## 10. Technical Requirements
### Update: 2025-10-10T04:30:00.000000
* **Security:**
* ... (existing points)
* Implement **Content Security Policy (CSP)** headers on the frontend to prevent XSS attacks.
* Apply API rate limiting at the Nginx and/or FastAPI level for authentication and registration endpoints. (Referenced: `architecture_document.md` Security Architecture Enhancements).
* **Database (PostgreSQL & Redis):**
* ... (existing points)
* Implement strategic indexing on `Message` (`conversation_id`, `sender_id`, `sent_at`), `User` (`username`, `email`), and `ConversationParticipant` (`user_id`, `conversation_id`) tables to optimize query performance for message history and user lookups. (Referenced: `architecture_document.md` Data Architecture Refinement).
## 12. Risk Assessment
### Update: 2025-10-10T04:30:00.000000
* **Database Performance (Medium):** ...
* **Mitigation (Additional):** Consider database read replicas for read-heavy operations, and explore partitioning strategies for the `Message` table in future phases to manage extreme data growth, directly supporting NFR-PM-002 (Scalability). (Referenced: `architecture_document.md` Data Architecture Refinement).
* **Security Vulnerabilities (High):** ...
* **Mitigation (Additional):** Implement a strict Content Security Policy (CSP) on the frontend; utilize secure environment variable management in production. (Referenced: `architecture_document.md` Security Architecture Enhancements).

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@ -70,4 +70,117 @@ Prioritization will focus on establishing a stable and usable foundation. **Must
- Integrating a state management library (e.g., NgRx, Akita) with an example implementation.
- Adding more complex example pages (e.g., a settings page, a user profile).
- Creating custom Angular Schematics to automate the creation of new feature modules that follow the boilerplate's conventions.
- Including pre-configured templates for CI/CD pipelines (e.g., GitHub Actions).
- Including pre-configured templates for CI/CD pipelines (e.g., GitHub Actions).
---
## PROJECT PLAN UPDATE - 2025-10-10 04:23:38
# Project Plan: Messaging App
## Generated: 2025-10-10T04:22:00.000000
This project plan outlines the strategic approach and high-level roadmap for developing the Messaging App. It aligns with the phased development strategy detailed in the `analysis_document.md` and informed by the `architecture_document.md` and `tech_stack_document.md`.
## 1. Project Phases & Objectives
### Update: 2025-10-10T04:22:00.000000
**Phase 1: Discovery & Architecture (Completed - Initial Stage)**
* **Objective:** Define the project scope, detailed requirements, architectural patterns, and technology stack.
* **Key Activities:** Requirements gathering (`analysis_document.md`), architectural design (`architecture_document.md`), technology selection (`tech_stack_document.md`), initial PRD creation.
**Phase 2: Core Messaging MVP Development (Estimated: 8-12 weeks)**
* **Objective:** Deliver a Minimum Viable Product (MVP) featuring secure user authentication, one-to-one real-time text messaging, and message persistence.
* **Key Activities:**
* Backend development: Authentication Service, User Service, Message Service, Real-time WebSocket Service.
* Database schema implementation and migrations (PostgreSQL, Redis).
* Frontend development: Integrate Auth, User List, 1:1 Chat UI components into Angular Clarity boilerplate.
* Establish Dockerized development environment for all services.
* Initial API endpoint development and testing (REST & WebSocket).
**Phase 3: Feature Expansion & Quality Assurance (Estimated: 6-10 weeks)**
* **Objective:** Implement advanced messaging features (group chat, notifications, media sharing) and conduct thorough quality assurance.
* **Key Activities:**
* Backend and Frontend development for Group Chat functionality.
* Backend and Frontend development for real-time notifications.
* Backend integration with object storage for media sharing (e.g., AWS S3).
* Frontend UI for media upload and display.
* Comprehensive unit, integration, and end-to-end testing.
* Performance benchmarking and optimization.
**Phase 4: Deployment Readiness & Operations (Estimated: 4-6 weeks)**
* **Objective:** Prepare the application for production deployment and establish robust operational practices.
* **Key Activities:**
* Develop and implement CI/CD pipelines (Build, Test, Deploy using GitHub Actions/GitLab CI).
* Configure production infrastructure (e.g., Kubernetes manifests, Nginx reverse proxy/load balancer).
* Implement monitoring, logging, and error tracking systems (e.g., Prometheus, Grafana, Loki, Sentry).
* Conduct security audits and penetration testing.
* Create operational runbooks and documentation.
## 2. Key Milestones
### Update: 2025-10-10T04:22:00.000000
* **M1 (Completed):** Core Project Analysis & Architecture Defined.
* **M2 (MVP Complete):** User Authentication, Profile Management, 1:1 Real-time Messaging, and Message History fully functional.
* **M3 (Features Complete):** Group Chat, Notifications, and Media Sharing implemented and tested.
* **M4 (Production Ready):** Application deployed to a production environment with robust CI/CD, monitoring, and security.
## 3. Resource Allocation (High-Level)
### Update: 2025-10-10T04:22:00.000000
* **Frontend Development:** Angular/TypeScript experts focusing on UI/UX and API integration.
* **Backend Development:** Python/FastAPI experts focusing on API logic, database interaction, and real-time WebSocket implementation.
* **DevOps/Infrastructure:** Specialists for Docker, Docker Compose, Kubernetes, CI/CD, monitoring, and cloud services.
* **Quality Assurance:** Dedicated QA for testing functional and non-functional requirements across all phases.
## 4. Risk Management (High-Level)
### Update: 2025-10-10T04:22:00.000000
* **Top Risks:** Scalability, Performance, Security, Integration Complexity, Scope Creep (as detailed in `prd_document.md` Risk Assessment).
* **Approach:** Proactive identification, continuous monitoring, and implementation of specific mitigation strategies (e.g., architectural choices for scaling, security best practices, strict MVP focus).
## 5. Communication Plan
### Update: 2025-10-10T04:22:00.000000
* **Daily Stand-ups:** Brief daily meetings for team synchronization and progress updates.
* **Sprint Reviews:** Bi-weekly demos of completed features to stakeholders.
* **Sprint Retrospectives:** Bi-weekly meetings for continuous process improvement.
* **Documentation:** All project artifacts (PRD, Architecture, Tech Stack, Plan) to be kept up-to-date and accessible in the `.sureai/` directory.
---
## PROJECT PLAN UPDATE - 2025-10-10 04:24:22
### Update: 2025-10-10T04:30:00.000000
## 1. Project Phases & Objectives
### Update: 2025-10-10T04:30:00.000000
**Phase 2: Core Messaging MVP Development (Estimated: 8-12 weeks)**
* **Key Activities:**
* Backend development: Implement Authentication Service (JWT), User Service (profile, search), Message Service (persistence), Real-time WebSocket Service (message delivery, presence). Utilize FastAPI, SQLAlchemy, PostgreSQL, and Redis as per `tech_stack_document.md`.
* Database schema implementation and Alembic migrations for `User`, `Conversation`, `Message`, and `ConversationParticipant` entities. Implement strategic indexing for performance (Referenced: `architecture_document.md` Data Architecture Refinement).
* Frontend development: Integrate Auth, User List, and 1:1 Chat UI components into the Angular Clarity boilerplate; create Angular services for REST and WebSocket communication.
* Establish a Dockerized development environment with `docker-compose.yml` for all services, ensuring local consistency (Referenced: `tech_stack_document.md` Infrastructure).
* Develop and thoroughly test REST API endpoints (e.g., `/api/auth/login`, `/api/users/search`, `/api/conversations/{id}/messages`).
* Develop and test WebSocket API events (e.g., `send_message`, `new_message`, `user_status_update`).
**Phase 3: Feature Expansion & Quality Assurance (Estimated: 6-10 weeks)**
* **Key Activities:**
* Backend and Frontend development for Group Chat functionality (creation, member management, messaging), including the associated REST and WebSocket APIs.
* Backend and Frontend development for real-time notifications (e.g., new message alerts, read receipts, user online/offline status notifications) leveraging Redis Pub/Sub.
* Backend integration with an object storage solution (e.g., AWS S3) for media sharing, including secure upload and retrieval mechanisms.
* Frontend UI for media upload, display, and management within chat interfaces.
* Comprehensive unit (Jest/Karma for Angular, Pytest for FastAPI), integration (API/WebSocket interaction), and end-to-end (Cypress/Playwright) testing across all new features and existing MVP functionalities.
* Performance benchmarking and optimization, including database query tuning, Redis configuration optimization, and frontend bundle size reduction.
**Phase 4: Deployment Readiness & Operations (Estimated: 4-6 weeks)**
* **Key Activities:**
* Develop and implement robust CI/CD pipelines (e.g., GitHub Actions/GitLab CI) for automated linting, testing, Docker image building, vulnerability scanning, and phased deployment to staging and production environments (Referenced: `tech_stack_document.md` CI/CD Pipeline Details).
* Configure production infrastructure using Kubernetes manifests or AWS ECS service definitions; set up Nginx as a reverse proxy/load balancer for both HTTP/S and WSS connections with SSL termination and rate limiting (Referenced: `tech_stack_document.md` API Gateway / Reverse Proxy Configuration).
* Implement comprehensive monitoring with Prometheus/Grafana, centralized logging with Loki/ELK, and error tracking with Sentry for both frontend and backend applications (Referenced: `tech_stack_document.md` Monitoring & Logging Tools).
* Conduct final security audits, penetration testing, and establish secure environment variable management in production environments.
* Create detailed operational runbooks and documentation for incident response, system maintenance, and scaling procedures.
* Implement automated database backup and restore procedures, ensuring data durability and disaster recovery capabilities.

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@ -92,4 +92,516 @@ Generated: Tuesday, September 16, 2025
- **Communication Protocol:** The boilerplate shall use Angular's `HttpClient` module to communicate with a backend over HTTP/HTTPS.
- **API Endpoint Configuration:** The base URL for the backend API shall be configurable via the `environments` files (e.g., `environment.ts`, `environment.prod.ts`).
- **Data Format:** The boilerplate is designed to work with APIs that transact data in **JSON** format.
- **Error Handling:** The architecture shall support a centralized way to handle API errors, typically through an `HttpInterceptor` provided in the `CoreModule`.
- **Error Handling:** The architecture shall support a centralized way to handle API errors, typically through an `HttpInterceptor` provided in the `CoreModule`.
---
## REQUIREMENTS UPDATE - 2025-10-10 04:17:44
# Requirements Document
Generated: 2025-10-10T[timestamp]
## Functional Requirements
### FR-001: User Registration
- **Description:** Allows new users to create an account by providing a unique username, email, and password.
- **Acceptance Criteria:**
- Given I am on the registration page, When I input a unique username, valid email, and strong password (min 8 chars, alphanumeric), Then my account is successfully created, and I am automatically logged in.
- Given I am on the registration page, When I input a username or email that already exists, Then the system provides an error message indicating the conflict.
- **Priority:** High
### FR-002: User Login/Logout
- **Description:** Enables registered users to securely log into and out of the application.
- **Acceptance Criteria:**
- Given I am on the login page, When I input my registered username/email and correct password, Then I am authenticated and granted access to the application.
- Given I am logged in, When I select the logout option, Then my session is terminated, and I am redirected to the login page.
- Given I input incorrect credentials, Then the system displays an "Invalid credentials" error.
- **Priority:** High
### FR-003: User Profile Management
- **Description:** Users can view and update their profile information (e.g., username, profile picture, status).
- **Acceptance Criteria:**
- Given I am logged in, When I navigate to my profile, Then I can see my current profile details.
- Given I am viewing my profile, When I update my username or profile picture, Then the changes are saved and reflected across the application.
- **Priority:** Medium
### FR-004: User Presence Status
- **Description:** Displays the online/offline status of users to their contacts.
- **Acceptance Criteria:**
- Given a user is logged in and active, When other users view their contact list, Then the user's status is displayed as "Online".
- Given a user logs out or becomes inactive for a configured period, When other users view their contact list, Then the user's status changes to "Offline".
- **Priority:** High
### FR-005: User Search
- **Description:** Allows users to search for other registered users within the application to initiate new conversations.
- **Acceptance Criteria:**
- Given I am logged in, When I use the search bar, Then I can type a username or email fragment.
- Given I have typed a search query, When matching users exist, Then a list of matching registered users is displayed.
- **Priority:** Medium
### FR-006: Send Text Message (1:1)
- **Description:** Enables a user to send a text message to another specific user.
- **Acceptance Criteria:**
- Given I am in a 1:1 chat window, When I type a message into the input field and click 'Send' or press 'Enter', Then the message is sent to the recipient and displayed in my chat history.
- Given the message is sent, When the recipient is online, Then they receive the message in real-time.
- **Priority:** High
### FR-007: Receive Text Message (1:1)
- **Description:** Enables a user to receive real-time text messages from another specific user.
- **Acceptance Criteria:**
- Given I am in a 1:1 chat window with an active sender, When the sender sends a message, Then the message instantly appears in my chat window.
- Given I am not in the chat window or offline, When I receive a message, Then a notification is triggered (as per FR-015).
- **Priority:** High
### FR-008: View Message History (1:1)
- **Description:** Displays the chronological history of messages between two users.
- **Acceptance Criteria:**
- Given I open an existing 1:1 chat, When the chat window loads, Then the most recent messages are displayed, and older messages can be loaded by scrolling up.
- **Priority:** High
### FR-009: Real-time Message Delivery (1:1)
- **Description:** Ensures immediate transmission and display of 1:1 messages between online users.
- **Acceptance Criteria:**
- Given both sender and receiver are online and in the respective chat windows, When a message is sent, Then the message appears in both chat windows within 500ms.
- **Priority:** High
### FR-010: Create Group Chat
- **Description:** Allows a user to initiate a new group conversation and invite other users.
- **Acceptance Criteria:**
- Given I am logged in, When I select the "Create Group Chat" option, Then I can provide a group name and select at least one other user to invite.
- Given a group chat is created, Then I am automatically added as a member and administrator.
- **Priority:** Medium
### FR-011: Add/Remove Members from Group
- **Description:** Group administrators can manage the membership of a group chat.
- **Acceptance Criteria:**
- Given I am a group administrator, When I access group settings, Then I can view current members and search for new users to invite.
- Given I select a user to add/remove, When I confirm the action, Then the user is added/removed from the group, and other members are notified (optional, but good for UX).
- **Priority:** Medium
### FR-012: Send Text Message (Group)
- **Description:** Enables a user to send a text message to all members of a group chat.
- **Acceptance Criteria:**
- Given I am in a group chat, When I type a message and press send, Then the message is sent to all active group members and displayed in the group chat history.
- **Priority:** Medium
### FR-013: Receive Text Message (Group)
- **Description:** Enables a user to receive real-time text messages from other members in a group chat.
- **Acceptance Criteria:**
- Given I am in a group chat, When another member sends a message, Then the message instantly appears in my group chat window.
- **Priority:** Medium
### FR-014: View Message History (Group)
- **Description:** Displays the chronological history of messages within a group chat.
- **Acceptance Criteria:**
- Given I open an existing group chat, When the chat window loads, Then the most recent messages are displayed, and older messages can be loaded by scrolling up.
- **Priority:** Medium
### FR-015: New Message Notification
- **Description:** Notifies the user of new messages when they are not actively viewing the conversation.
- **Acceptance Criteria:**
- Given I receive a new message in a conversation I am not currently viewing, When I am online, Then I receive an in-app notification (e.g., badge count, toast message).
- **Priority:** Medium
### FR-016: User Online/Offline Status Notification
- **Description:** Notifies users when a contact comes online or goes offline.
- **Acceptance Criteria:**
- Given I am online, When one of my contacts comes online/goes offline, Then I receive an in-app notification of their status change (configurable).
- **Priority:** Low
### FR-017: Send Image/File in Chat
- **Description:** Allows users to attach and send image or file attachments within a chat.
- **Acceptance Criteria:**
- Given I am in a chat window, When I select the "Attach File" option and choose an image/file (up to 10MB), Then the file is uploaded and sent as part of the message.
- **Priority:** Low (for MVP, but crucial for enhancement)
### FR-018: View Shared Image/File in Chat
- **Description:** Allows users to view or download shared image/file attachments within a chat.
- **Acceptance Criteria:**
- Given I receive a message with an attached image/file, When I view the message, Then I can see a preview of the image or a link to download the file.
- **Priority:** Low (for MVP, but crucial for enhancement)
## Non-Functional Requirements
### NFR-001: Performance (Message Latency)
- **Description:** Messages between active, online users should be delivered with minimal delay.
- **Acceptance Criteria:** 95% of real-time messages shall be delivered from sender to receiver within 500 milliseconds under typical load (up to 1,000 concurrent users).
### NFR-002: Performance (Concurrent Users)
- **Description:** The system must be able to handle a specified number of users actively using the chat features simultaneously.
- **Acceptance Criteria:** The system shall support at least 1,000 concurrently active users, sending/receiving messages without significant degradation in performance (NFR-001).
### NFR-003: Security (Authentication)
- **Description:** All user access to the application and its features must be securely authenticated.
- **Acceptance Criteria:** User authentication shall be implemented using JSON Web Tokens (JWT) for API access, ensuring token expiration and refresh mechanisms are in place.
### NFR-004: Security (Authorization)
- **Description:** Users must only be able to access data and perform actions for which they have explicit permission.
- **Acceptance Criteria:**
- A user shall only be able to retrieve their own messages and messages from conversations they are a part of.
- Only group administrators can perform administrative actions (e.g., add/remove members).
### NFR-005: Security (Data Encryption)
- **Description:** Communication between the client and server must be encrypted to protect sensitive data.
- **Acceptance Criteria:** All network communication (HTTP and WebSocket) shall use TLS/SSL encryption (HTTPS/WSS).
### NFR-006: Scalability (Horizontal Scaling)
- **Description:** The backend services should be designed to scale horizontally to handle increased user load and data volume.
- **Acceptance Criteria:** Backend services (API, WebSocket server) shall be stateless and deployable as multiple instances behind a load balancer without requiring session affinity.
### NFR-007: Usability (Responsive UI)
- **Description:** The application's user interface must adapt to different screen sizes and devices.
- **Acceptance Criteria:** The frontend, leveraging Angular Clarity, shall provide a fully responsive layout that is usable on desktop, tablet, and mobile browsers.
### NFR-008: Reliability (Message Persistence)
- **Description:** All sent messages must be reliably stored and retrievable.
- **Acceptance Criteria:** Every successfully sent message shall be persisted in the database and accessible in chat history, even after application restarts or user logouts.
## Data Requirements
### Entities:
1. **User:**
* `id` (Primary Key, UUID)
* `username` (String, Unique, Not Null)
* `email` (String, Unique, Not Null)
* `password_hash` (String, Not Null)
* `profile_picture_url` (String, Optional)
* `status` (Enum: 'online', 'offline', 'away', Default: 'offline')
* `created_at` (Timestamp, Not Null)
* `updated_at` (Timestamp, Not Null)
2. **Conversation:** (Represents a 1:1 or Group Chat instance)
* `id` (Primary Key, UUID)
* `type` (Enum: 'one_to_one', 'group', Not Null)
* `name` (String, Optional, for Group Chats)
* `created_at` (Timestamp, Not Null)
* `updated_at` (Timestamp, Not Null)
3. **ConversationParticipant:** (Junction table for Users and Conversations)
* `conversation_id` (Foreign Key to Conversation.id)
* `user_id` (Foreign Key to User.id)
* `role` (Enum: 'member', 'admin', Optional, for Group Chats)
* `joined_at` (Timestamp, Not Null)
* `last_read_message_id` (Foreign Key to Message.id, Optional, tracks read status)
* `is_active` (Boolean, Default: true, for leaving groups/1:1s)
4. **Message:**
* `id` (Primary Key, UUID)
* `conversation_id` (Foreign Key to Conversation.id, Not Null)
* `sender_id` (Foreign Key to User.id, Not Null)
* `content` (Text, Not Null)
* `type` (Enum: 'text', 'image', 'file', Default: 'text')
* `attachment_url` (String, Optional, for image/file)
* `sent_at` (Timestamp, Not Null)
* `edited_at` (Timestamp, Optional)
* `deleted_at` (Timestamp, Optional)
### Relationships:
* User 1:N ConversationParticipant (A user can participate in many conversations)
* Conversation 1:N ConversationParticipant (A conversation has many participants)
* Conversation 1:N Message (A conversation has many messages)
* User 1:N Message (A user can send many messages)
## Interface Requirements
### General UI/UX:
* **Clarity Design System Adherence:** The frontend UI must strictly follow the guidelines and component library of the Clarity Design System for consistency and accessibility.
* **Responsive Layout:** The main layout (header, sidebar, content area) must be responsive, adapting to different screen sizes as per the base boilerplate.
### Specific Components (Leveraging Angular Clarity):
* **Login/Registration Forms:** Use Clarity form controls (input, password, button) with validation feedback.
* **Chat List/Sidebar:** Implement a Clarity-style navigable list (`clr-vertical-nav` or similar) to display active conversations with user names/group names and unread indicators.
* **Chat Window:**
* **Header:** Display current chat partner's name/group name, presence status (for 1:1).
* **Message Display Area:** Use Clarity cards or lists to display individual messages. Messages from current user should be visually distinct from others. Display sender name/picture, message content, and timestamp.
* **Message Input:** Clarity input field with a send button and optional attachment icon.
* **Scroll Behavior:** Auto-scroll to the latest message on load and new message receipt.
* **User Profile Page:** Display user details using Clarity forms and cards.
* **Notifications:** Use Clarity alerts or toast messages for in-app notifications.
### API Requirements:
* **RESTful API (Backend):**
* `POST /api/auth/register`: User registration.
* `POST /api/auth/login`: User login, returns JWT.
* `GET /api/users/me`: Retrieve current user profile.
* `PUT /api/users/me`: Update current user profile.
* `GET /api/users/search?query=...`: Search for users.
* `GET /api/conversations`: Retrieve list of user's conversations.
* `GET /api/conversations/{id}/messages`: Retrieve messages for a specific conversation (paginated).
* `POST /api/conversations/one-to-one`: Create a 1:1 conversation.
* `POST /api/conversations/group`: Create a group conversation.
* `POST /api/messages`: Send a message (HTTP fallback if WebSocket not connected).
* **WebSocket API (Backend):**
* `wss://api.yourdomain.com/ws/chat`: WebSocket endpoint for real-time communication.
* **Events (Client to Server):**
* `send_message`: { `conversationId`, `content`, `type`, `attachmentUrl` }
* `user_typing`: { `conversationId` }
* `read_message`: { `messageId`, `conversationId` }
* **Events (Server to Client):**
* `new_message`: { `messageId`, `conversationId`, `senderId`, `content`, `type`, `attachmentUrl`, `sentAt` }
* `user_status_update`: { `userId`, `status` }
* `typing_indicator`: { `userId`, `conversationId` }
* `conversation_update`: { `conversationId`, `type`... } (e.g., new member in group)
---
## REQUIREMENTS UPDATE - 2025-10-10 04:18:09
## Update: Requirements Document Alignment Note (2025-10-10T[timestamp])
The detailed Functional (FR), Non-Functional (NFR), Data, and Interface Requirements outlined in this document are in strong alignment with the strategic direction, core features, and architectural considerations specified in the `io8codermaster_breakdown.md` and `io8codermaster_plan.md` for the Messaging App project. Particular emphasis on `NFR-001` (Message Latency), `NFR-002` (Concurrent Users), `NFR-003` (Authentication), `NFR-004` (Authorization), `NFR-005` (Data Encryption), and `NFR-006` (Horizontal Scaling) directly addresses the core concerns of performance, security, and scalability highlighted in the codermaster documents. The phased approach for `FR-010` through `FR-018` (Group Messaging, Notifications, Media Sharing) also reflects the planned incremental feature expansion.
---
## REQUIREMENTS UPDATE - 2025-10-10 04:19:20
```markdown
# Requirements Document
Generated: 2025-10-10T04:04:00.075502
## Functional Requirements
### FR-001: User Registration
- **Description:** The system shall allow new users to register an account with a unique email and password.
- **Acceptance Criteria:**
- User can submit registration form.
- System validates unique email format and strong password policy.
- Upon successful registration, a new user record is created in the database.
- User is either automatically logged in or redirected to the login page.
- **Priority:** High (Milestone 1: Core Messaging MVP, as per `.io8codermaster_breakdown.md`)
### FR-002: User Login
- **Description:** The system shall allow registered users to log in securely using their email and password.
- **Acceptance Criteria:**
- User can submit login credentials.
- System authenticates credentials against stored user data.
- Upon successful authentication, a secure session token (e.g., JWT) is issued.
- User is redirected to the main application dashboard/chat interface.
- System provides clear feedback for invalid credentials.
- **Priority:** High (Milestone 1: Core Messaging MVP)
### FR-003: User Profile Management
- **Description:** The system shall allow authenticated users to view and update their profile information.
- **Acceptance Criteria:**
- User can access a dedicated profile page.
- User can update fields such as username, email (with re-verification), and potentially a profile picture.
- Changes are validated and persisted in the database.
- Profile updates are reflected across the application (e.g., in chat lists).
- **Priority:** Medium (Milestone 1: Core Messaging MVP)
### FR-004: Display User List
- **Description:** The system shall display a list of other registered users with whom the authenticated user can chat.
- **Acceptance Criteria:**
- The user list is available in a dedicated sidebar or section of the UI, leveraging Angular Clarity components.
- Each entry displays the user's name and online/offline status (presence).
- Clicking a user's name opens a one-to-one chat window with that user.
- **Priority:** High (Milestone 1: Core Messaging MVP)
### FR-005: Send One-to-One Text Message
- **Description:** The system shall enable an authenticated user to send real-time text messages to another selected user.
- **Acceptance Criteria:**
- User can type messages into a dedicated input field within a chat window.
- Messages are sent by pressing Enter or clicking a send button.
- Sent messages are displayed immediately in the sender's chat window.
- Messages are routed to the recipient in real-time via WebSocket.
- Messages are persisted in the database.
- **Priority:** High (Milestone 1: Core Messaging MVP)
### FR-006: Receive One-to-One Text Message
- **Description:** The system shall enable an authenticated user to receive real-time text messages from another user.
- **Acceptance Criteria:**
- Incoming messages from an active chat partner are displayed instantly in the chat window.
- Messages received while the user is offline are displayed upon their next login.
- Messages include sender's name and timestamp.
- **Priority:** High (Milestone 1: Core Messaging MVP)
### FR-007: View One-to-One Chat History
- **Description:** The system shall allow users to view the complete history of their one-to-one conversations with another user.
- **Acceptance Criteria:**
- When a chat window is opened, previous messages with that user are loaded and displayed chronologically.
- The chat history should be scrollable, with older messages loading on demand (pagination/infinite scroll).
- **Priority:** High (Milestone 1: Core Messaging MVP)
### FR-008: User Presence Indicator
- **Description:** The system shall display the online/offline status of other users in the user list and chat windows.
- **Acceptance Criteria:**
- A visual indicator (e.g., colored dot) next to a user's name signifies their online or offline status.
- Status updates occur in real-time as users connect or disconnect.
- **Priority:** High (Milestone 1: Core Messaging MVP)
### FR-009: Group Chat Creation (Phase 2)
- **Description:** The system shall allow users to create new group chat rooms and invite other users, as outlined in Milestone 2 of `.io8codermaster_breakdown.md`.
- **Acceptance Criteria:**
- User can initiate creation of a new group chat.
- User can provide a group name and select members from their contact list.
- A new group chat entry appears in the user's chat list.
- **Priority:** Medium (Milestone 2: Enhanced Communication & Features)
### FR-010: Send and Receive Group Messages (Phase 2)
- **Description:** The system shall enable authenticated users to send and receive text messages within a group chat.
- **Acceptance Criteria:**
- Messages sent in a group chat are delivered to all active members of that group in real-time.
- Messages are persisted and visible in the group's chat history for all members.
- **Priority:** Medium (Milestone 2: Enhanced Communication & Features)
### FR-011: Real-time Notifications (Phase 2)
- **Description:** The system shall provide real-time notifications for new messages and relevant events (e.g., user online/offline, group invite), as outlined in Milestone 2 of `.io8codermaster_breakdown.md`.
- **Acceptance Criteria:**
- In-app notifications (e.g., badge counts, toast messages) are displayed for unread messages.
- Notifications are dismissed when the relevant chat is viewed.
- **Priority:** Medium (Milestone 2: Enhanced Communication & Features)
### FR-012: Media Sharing (Phase 2)
- **Description:** The system shall allow users to share images and potentially other file types within one-to-one and group chats, as outlined in Milestone 2 of `.io8codermaster_breakdown.md`.
- **Acceptance Criteria:**
- User can select an image/file to attach to a message.
- Shared media is uploaded to a storage service and a link/preview is displayed in the chat.
- Recipients can view/download shared media.
- **Priority:** Low (Milestone 2: Enhanced Communication & Features)
## Non-Functional Requirements
### NFR-001: Performance
- **Description:** The application must provide low-latency message delivery and a responsive user interface, addressing the performance risk from `.io8codermaster_plan.md`.
- **Acceptance Criteria:**
- Average message delivery time (sender to receiver) shall be less than 200ms for 95% of messages under normal load.
- Frontend UI responsiveness (e.g., navigation, chat window loading) shall be perceived as instantaneous (less than 500ms for 90% of interactions).
- The backend API shall respond to non-real-time requests (e.g., profile update) within 300ms for 90% of requests.
- **Priority:** High
### NFR-002: Security
- **Description:** The application must protect user data and communications from unauthorized access and ensure secure operations, addressing the critical security risks and constraints from `.io8codermaster_breakdown.md` and `.io8codermaster_plan.md`.
- **Acceptance Criteria:**
- All communications between frontend and backend (REST and WebSockets) shall be encrypted using TLS/SSL.
- User passwords shall be securely hashed and salted before storage.
- Authentication tokens (e.g., JWT) shall be used, with appropriate expiration and refresh mechanisms.
- Backend APIs shall implement input validation to prevent common vulnerabilities (e.g., XSS, SQL injection).
- Access control mechanisms shall ensure users can only access their own data and authorized conversations.
- Adherence to OWASP Top 10 guidelines shall be implemented.
- **Priority:** Critical
### NFR-003: Scalability
- **Description:** The system must be designed to scale horizontally to accommodate a growing number of concurrent users and message volume, as highlighted as a key constraint and risk in `.io8codermaster_breakdown.md` and `.io8codermaster_plan.md`.
- **Acceptance Criteria:**
- The system shall support at least 1,000 concurrent active users with message delivery performance maintained.
- The backend services and real-time layer shall be containerized and deployable in a clustered environment.
- Database architecture should support growth in user and message data (e.g., sharding or replication capabilities).
- **Priority:** High
### NFR-004: Usability
- **Description:** The application shall provide an intuitive, consistent, and easy-to-use interface, leveraging the Clarity Design System as per the base project (`.io8codermaster_breakdown.md`).
- **Acceptance Criteria:**
- User interface shall adhere to the Clarity Design System guidelines for components, typography, and color palettes.
- Key actions (sending a message, selecting a user) shall be discoverable within 3 clicks.
- Error messages shall be clear, concise, and actionable.
- The application shall be fully responsive across common desktop and mobile browser sizes.
- **Priority:** High
### NFR-005: Reliability
- **Description:** The application shall maintain high availability and ensure message delivery.
- **Acceptance Criteria:**
- The system shall have an uptime of 99.9% (excluding planned maintenance).
- Messages sent shall be guaranteed to be delivered (at least once) to the recipient, even if the recipient is temporarily offline.
- Robust error handling and logging mechanisms shall be in place for both frontend and backend.
- **Priority:** High
### NFR-006: Maintainability
- **Description:** The codebase and infrastructure shall be easy to understand, modify, and extend, facilitating future development and bug fixes.
- **Acceptance Criteria:**
- Code shall be modular, following established design patterns and best practices for Angular (frontend) and chosen backend framework.
- Comprehensive inline code comments and external documentation (e.g., API documentation, architecture diagrams) shall be provided.
- Automated unit and integration tests shall cover at least 80% of the codebase.
- Dependencies shall be managed and updated regularly.
- **Priority:** Medium
### NFR-007: Real-time Capability
- **Description:** Core messaging functionalities must operate in real-time, providing immediate updates, as this is a core requirement of the messaging app (`.io8codermaster_breakdown.md`).
- **Acceptance Criteria:**
- New messages appear on the recipient's screen without requiring a page refresh.
- User online/offline status updates are reflected within 5 seconds.
- Typing indicators (if implemented) update within 2 seconds.
- **Priority:** Critical
## Data Requirements
#### 1. User Entity
- **Purpose:** Stores user authentication and profile information, supporting FR-001, FR-002, FR-003.
- **Fields:**
- `id` (UUID, Primary Key)
- `username` (String, Unique)
- `email` (String, Unique, Required)
- `password_hash` (String, Required)
- `profile_picture_url` (String, Optional)
- `status` (Enum: 'online', 'offline', 'away', Default: 'offline')
- `created_at` (Timestamp)
- `updated_at` (Timestamp)
#### 2. Message Entity
- **Purpose:** Stores individual chat messages, supporting FR-005, FR-006, FR-007.
- **Fields:**
- `id` (UUID, Primary Key)
- `sender_id` (UUID, Foreign Key to User.id, Required)
- `receiver_id` (UUID, Foreign Key to User.id, Optional, for 1:1 chats)
- `chat_room_id` (UUID, Foreign Key to ChatRoom.id, Optional, for group chats)
- `content` (Text, Required)
- `timestamp` (Timestamp, Required)
- `type` (Enum: 'text', 'image', 'file', Default: 'text')
- `read_status` (Boolean, Default: false)
- `media_url` (String, Optional, for 'image' or 'file' types)
#### 3. ChatRoom Entity (for Group Chats - Phase 2)
- **Purpose:** Stores metadata for group chat rooms, supporting FR-009, FR-010.
- **Fields:**
- `id` (UUID, Primary Key)
- `name` (String, Required)
- `description` (Text, Optional)
- `created_by` (UUID, Foreign Key to User.id, Required)
- `created_at` (Timestamp)
- `updated_at` (Timestamp)
#### 4. ChatRoomMember Entity (for Group Chats - Phase 2)
- **Purpose:** Links users to chat rooms, supporting FR-009, FR-010.
- **Fields:**
- `id` (UUID, Primary Key)
- `chat_room_id` (UUID, Foreign Key to ChatRoom.id, Required)
- `user_id` (UUID, Foreign Key to User.id, Required)
- `joined_at` (Timestamp)
- `role` (Enum: 'member', 'admin', Default: 'member')
## Interface Requirements
#### 1. User Interface (Frontend - Angular Clarity)
- **Overall Layout:** Main layout with a header, a persistent left-hand sidebar for user/chat lists, and a primary content area for active chat windows, consistent with the existing Angular Clarity boilerplate, as specified in `.io8codermaster_breakdown.md`.
- **Components (leveraging Clarity):**
- **Login/Registration Forms:** Clarity form components for user input and validation.
- **User List:** A scrollable list of users, displaying name, profile picture (if available), and real-time online status.
- **Chat Window:** Area displaying messages chronologically, including sender name, content, and timestamp. Should support scrolling for history.
- **Message Input:** A text area and send button for composing and sending messages.
- **Profile Page:** Forms for editing user details, displaying current profile information.
- **Notification Banners/Toasts:** For system-wide alerts or new message notifications (Phase 2).
- **Navigation:** Intuitive navigation between the user list, active chats, and profile settings.
- **Responsiveness:** The UI must adapt gracefully to various screen sizes, from desktop to mobile devices.
#### 2. API Requirements (Backend - RESTful & WebSocket)
- **RESTful API (for Authentication & User/Profile Management):**
- `POST /api/auth/register`: User registration.
- `POST /api/auth/login`: User login, returns JWT.
- `GET /api/users`: Retrieve a list of all registered users (or contacts).
- `GET /api/users/{id}`: Retrieve a specific user's profile.
- `PUT /api/users/{id}`: Update authenticated user's profile.
- `GET /api/chats/history/{userId}`: Retrieve 1:1 chat history with a specific user.
- `GET /api/groups/{groupId}/history`: Retrieve group chat history (Phase 2).
- **WebSocket API (for Real-time Messaging & Presence):**
- **Connection:** Establish a secure WebSocket connection after successful user authentication.
- **Message Sending:** `send_message` event with payload (sender_id, receiver_id/chat_room_id, content, type, etc.).
- **Message Receiving:** `receive_message` event with message payload.
- **Presence Updates:** `user_online`, `user_offline`, `user_typing` events.
- **Notifications:** `new_message_notification`, `group_invite_notification` events.
- **Error Handling:** APIs shall return standardized error responses (HTTP status codes for REST, specific error codes/messages for WebSockets).
```

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@ -36,4 +36,140 @@ Generated: Tuesday, September 16, 2025
* **Code Formatting/Linting:**
* **ESLint:** Used for identifying and reporting on patterns in ECMAScript/JavaScript code.
* **Prettier:** An opinionated code formatter that enforces a consistent style.
* **EditorConfig:** Helps maintain consistent coding styles for multiple developers working on the same project across various editors and IDEs.
* **EditorConfig:** Helps maintain consistent coding styles for multiple developers working on the same project across various editors and IDEs.
---
## TECH STACK UPDATE - 2025-10-10 04:19:30
# Technology Stack Document
Generated: 2025-10-10T04:04:10.080488
## Frontend Technologies - 2025-10-10T04:04:10.080488
- **Framework:** Angular (v16+). Leverages the existing Angular Clarity Boilerplate.
- **UI Library:** VMware Clarity Design System (already integrated in boilerplate).
- **Reactive Programming:** RxJS for managing asynchronous data streams and events.
- **State Management:** Angular Services + RxJS for local component state; NgRx (Store, Effects) if global, complex state management becomes necessary for advanced features.
- **HTTP Client:** Angular `HttpClient` for REST API interactions.
- **Real-time Client:** Custom Angular service leveraging native `WebSocket` API or a library wrapper (e.g., `ngx-socket-io`) for WebSocket communication.
## Backend Technologies - 2025-10-10T04:04:10.080488
- **Language:** Python 3.9+.
- **Framework:** FastAPI (for REST API services) and Starlette/websockets library (for WebSocket Gateway) due to its high performance, async capabilities, and excellent developer experience. Alternatively, Django Channels could be considered if a more monolithic Python backend is preferred, but FastAPI with dedicated WebSocket handling offers better microservice alignment.
- **API Type:** RESTful API for standard operations; WebSocket for real-time communication.
- **Authentication:** `PyJWT` for JSON Web Token handling. `Passlib` for password hashing (bcrypt).
- **ORM/Database Client:** SQLAlchemy 2.0 with Alembic for migrations, or Tortoise ORM for async support with FastAPI.
- **Message Broker Client:** `Pika` (for RabbitMQ) or `confluent-kafka-python` (for Kafka).
## Database Technologies - 2025-10-10T04:04:10.080488
- **Primary Database:** PostgreSQL (v14+) for its robustness, advanced features (JSONB), and strong support for relational data and scalability. Suitable for `User`, `Conversation`, `ConversationParticipant`, and `Message` entities.
- **Caching/Real-time Data Store:** Redis (v7+) for user presence, session management, Pub/Sub for WebSocket scaling, and general-purpose caching. Crucial for low-latency real-time features.
- **Object Storage (Future for Media Sharing):** Amazon S3, Google Cloud Storage, or a compatible MinIO instance for storing image and file attachments (`FR-017`).
## Infrastructure - 2025-10-10T04:04:10.080488
- **Containerization:** Docker for packaging all frontend and backend services into isolated containers.
- **Orchestration (Development/Local):** Docker Compose for defining and running multi-container Docker applications locally.
- **Orchestration (Production):** Kubernetes (e.g., AWS EKS, Azure AKS, GCP GKE) for scalable, fault-tolerant deployment of microservices, or AWS ECS/Fargate for managed container orchestration for simpler deployments.
- **Hosting:** Cloud provider like AWS, Azure, or GCP.
- **Load Balancer/Reverse Proxy:** Nginx for HTTP/HTTPS load balancing and SSL termination for REST API and WebSocket connections.
- **CI/CD:** GitHub Actions or GitLab CI/CD for automated testing, building, and deployment pipelines.
## Development Tools - 2025-10-10T04:04:10.080488
- **Version Control:** Git (GitHub/GitLab/Bitbucket).
- **IDE:** Visual Studio Code with relevant Angular, Python, Docker extensions.
- **Frontend Testing:** Jest/Karma (Unit testing), Cypress/Playwright (E2E testing).
- **Backend Testing:** Pytest (Unit/Integration testing).
- **API Documentation:** OpenAPI/Swagger UI (FastAPI provides this automatically).
- **Linting/Formatting:** ESLint/Prettier (Frontend), Black/Flake8/isort (Backend).
---
## TECH STACK UPDATE - 2025-10-10 04:20:49
# Technology Stack Document Update: Messaging App
Generated: 2025-10-10T[timestamp]
## Frontend Technologies
- **Framework:** Angular (v12+), leveraging the existing Angular Clarity Boilerplate structure and tools.
- **Styling:** VMware Clarity Design System (CSS components and styles).
- **State Management:** RxJS for reactive programming and managing application state, Angular Services for shared data logic. Potentially NgRx for more complex global state management in later phases if needed.
- **Real-time Client:** Native WebSocket API through Angular services, potentially using `ngx-web-socket` or a similar wrapper for streamlined integration.
## Backend Technologies
- **Language:** Python 3.9+ (Chosen for its robust ecosystem, excellent asynchronous capabilities, and developer productivity, making it suitable for a real-time application).
- **Framework:** FastAPI (High-performance web framework for building APIs with Python 3.7+ based on standard Python type hints. Ideal for RESTful APIs and seamless integration with WebSockets due to its ASGI nature).
- **API:**
- **RESTful API:** Implemented with FastAPI for authentication, user management, and historical data retrieval.
- **WebSocket API:** Implemented using FastAPI's built-in Starlette WebSocket capabilities for real-time messaging and presence.
- **ORM/Database Client:** SQLAlchemy with Alembic for migrations (for PostgreSQL interaction, offering robust ORM capabilities and database schema management).
- **Password Hashing:** `bcrypt` library.
- **JWT Handling:** `python-jose` or `PyJWT` for token generation and validation.
## Database Technologies
- **Primary Database:** PostgreSQL (Chosen for its reliability, advanced features like JSONB, robust transaction support, and strong scalability for relational data. Suitable for storing user, conversation, and message data).
- **Caching/Message Broker:** Redis (Used for storing user presence data, serving as a Pub/Sub message broker for real-time event distribution across WebSocket instances, and for general-purpose caching).
## Infrastructure
- **Deployment:**
- **Containerization:** Docker (All frontend and backend services will be containerized).
- **Orchestration (Local/Dev):** Docker Compose (For defining and running multi-container Docker applications for local development and staging environments).
- **Orchestration (Production):** Kubernetes or AWS ECS/Fargate (Future consideration for highly scalable and resilient production deployments, allowing for horizontal scaling of backend and WebSocket services).
- **Hosting:** Cloud-agnostic design, with potential deployment on AWS, Azure, or GCP. For media storage (Phase 2), cloud-native object storage like AWS S3 or Google Cloud Storage will be utilized.
- **Reverse Proxy/Load Balancer:** Nginx (To serve the Angular frontend, proxy API requests to backend services, and manage WebSocket connections, handling SSL termination).
## Development Tools
- **Version Control:** Git (GitHub/GitLab/Bitbucket for repository hosting).
- **Testing:**
- **Frontend:** Jest / Karma & Jasmine (For Angular unit and integration tests).
- **Backend:** Pytest (For Python backend unit, integration, and API tests).
- **CI/CD:** GitHub Actions / GitLab CI / Jenkins (To automate testing, building, and deployment pipelines).
- **Code Quality:** Prettier, ESLint (Frontend); Black, Flake8 (Backend) for code formatting and linting.
- **API Documentation:** FastAPI's automatic OpenAPI (Swagger UI/ReDoc) generation for backend API documentation.
---
## TECH STACK UPDATE - 2025-10-10 04:21:29
# Technology Stack Document Update
Generated: 2025-10-10T04:20:00.000000
## Monitoring & Logging Tools
To address NFR-005 (Reliability) and NFR-006 (Maintainability) and provide crucial operational insights, the following tools will be integrated:
* **Metrics & Dashboards:** Prometheus (for time-series data collection from backend services, database, Redis) and Grafana (for visualizing metrics and creating interactive dashboards). FastAPI's `Prometheus-FastAPI-Instrumentator` can be used for easy integration.
* **Centralized Logging:** Loki (for log aggregation) with Promtail (for shipping logs from containers) or Elasticsearch, Logstash, Kibana (ELK Stack) for comprehensive log management, search, and analysis.
* **Error Tracking:** Sentry (or similar) for real-time error tracking and alerting in both frontend (Angular) and backend (FastAPI) applications.
## CI/CD Pipeline Details
Building on the mention of GitHub Actions/GitLab CI, a more detailed workflow will include:
* **Linting & Formatting:** Automatic checks (Prettier, ESLint, Black, Flake8) on every pull request or commit to ensure code quality and consistency.
* **Automated Testing:**
* **Unit Tests:** Run Jest/Karma & Jasmine for Angular, Pytest for FastAPI.
* **Integration Tests:** API-level tests for backend endpoints and WebSocket interactions.
* **Container Image Building:** Docker images for frontend (Nginx serving Angular build) and backend (FastAPI application) are built and tagged.
* **Vulnerability Scanning:** Scan Docker images for known vulnerabilities using tools like Trivy or Clair.
* **Deployment to Staging:** Automated deployment of new container images to a staging environment for further testing and review.
* **Production Deployment:** Manual or automated (after successful staging) deployment to the production environment, potentially using Kubernetes deployment manifests or AWS ECS service definitions.
## API Gateway / Reverse Proxy Configuration
Elaborating on Nginx's role in Infrastructure, it will be configured for:
* **SSL Termination:** Handling HTTPS/WSS encryption and decryption, offloading this CPU-intensive task from backend services.
* **Load Balancing:** Distributing incoming HTTP and WebSocket traffic across multiple instances of the FastAPI backend and WebSocket services to ensure high availability and scalability (NFR-003, NFR-006).
* **Request Routing:** Routing `/api/*` requests to the backend services and `/ws/chat` requests to the WebSocket Service, while serving static files for the Angular frontend.
* **Rate Limiting:** Implementing basic rate limiting policies to protect backend endpoints from abuse and DDoS attacks, directly supporting NFR-002 (Security).
## Future Technology Considerations (Phase 2 & Beyond)
* **Media Storage:** AWS S3, Google Cloud Storage, or Azure Blob Storage (already mentioned but emphasized for its scalability with FR-017, FR-018).
* **Background Task Queue:** Celery with Redis for asynchronous task processing, especially for heavy operations like media resizing/processing or complex notification delivery for Phase 2 features.

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