# Product Requirements Document (PRD) - Angular Clarity Boilerplate

## 1. Product Vision

To provide a robust, scalable, and feature-rich boilerplate that serves as a foundational template for building modern, enterprise-grade web applications using Angular and the VMware Clarity Design System. The vision is to accelerate the development lifecycle by offering a pre-configured, best-practice project structure.

## 2. Target Audience

The primary target audience consists of **Angular developers and development teams** who require a standardized, efficient, and consistent starting point for new projects. This includes:

* **Enterprise Development Teams:** Teams that need to maintain a consistent look and feel across multiple applications.
* **Independent Developers:** Individuals looking to quickly bootstrap new projects without spending significant time on initial setup and configuration.

## 3. User Stories (Developer Stories)

### User Story 1: Quick Project Initialization
- **As a developer, I want to clone the repository and run `npm install` and `ng serve` to get a live development server running, so that I can bypass manual setup and start building features immediately.**
- **Acceptance Criteria:**
    - Given I have Node.js and Angular CLI installed,
    - When I clone the repository, install dependencies, and run the start command,
    - Then the application compiles successfully and is accessible in my browser at `localhost:4200`.

### User Story 2: Add a New Feature
- **As a developer, I want to create a new lazy-loaded feature module with its own components and routing, so that I can add new sections to the application in a scalable way.**
- **Acceptance Criteria:**
    - Given the boilerplate is running,
    - When I use the Angular CLI to generate a new module and add it to the main routing configuration,
    - Then I can navigate to the new feature's route, and its components are rendered correctly.

### User Story 3: Utilize Shared Components
- **As a developer, I want to use a component from the `SharedModule` within a new feature module, so that I can reuse common UI elements and maintain consistency.**
- **Acceptance Criteria:**
    - Given I have a new feature module,
    - When I import the `SharedModule` into my feature module,
    - Then I can use the shared components (e.g., a custom card or loader) in my feature's templates without errors.

## 4. Functional Requirements

- **FR-001: Pre-configured Angular Environment:** A ready-to-use Angular CLI project with all necessary dependencies and build configurations.
- **FR-002: Clarity Design System Integration:** Full integration of Clarity UI components and styles, ready for immediate use.
- **FR-003: Scalable Architecture:** A modular structure featuring a `CoreModule` for singleton services and a `SharedModule` for reusable UI components, directives, and pipes.
- **FR-004: Responsive Layout:** A default application shell with a responsive header, navigation sidebar, and main content area.
- **FR-005: Routing:** A pre-configured routing module with examples of lazy-loaded feature modules.
- **FR-006: Theming:** Basic support for Clarity's light and dark themes.

## 5. Non-Functional Requirements

- **NFR-001: Performance:** The initial boilerplate should be lightweight, ensuring fast development server startup times and optimized production builds.
- **NFR-002: Usability (Developer Experience):** The codebase must be clean, well-commented, and logically organized to provide an excellent developer experience.
- **NFR-003: Maintainability:** The modular architecture must facilitate easy updates to dependencies and allow for the addition of new features without introducing breaking changes to the core structure.
- **NFR-004: Scalability:** The architecture is designed to support the growth of large, enterprise-scale applications.
- **NFR-005: Extensibility:** The boilerplate should be easy to customize and extend with additional libraries, modules, and configurations as per project-specific needs.

## 6. Out of Scope

The following features and functionalities are explicitly out of scope for the boilerplate:

-   **Backend Implementation:** This is a frontend-only boilerplate and does not include any backend code or database.
-   **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.

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## PRD UPDATE - 2025-09-25 06:57:40

# Product Requirements Document (PRD) Update - 2025-09-25 07:30:00

## 1. Executive Summary Update
This document updates the PRD to reflect the user's request for a simple calculator application. The application will be a single-page application (SPA) built using Angular and will not require a backend.

## 2. Product Vision & Strategy Update
The product vision is to deliver a user-friendly, reliable, and responsive calculator application capable of performing basic arithmetic operations. The primary success metric will be the successful completion and deployment of the application, meeting all functional and non-functional requirements.

## 3. Target Users & Personas Update
The target users are individuals who need a simple and easy-to-use calculator for everyday tasks. Personas will be developed in a later iteration.

## 4. Problem Statement Update
The problem is the lack of a readily available, simple, and reliable calculator application that is accessible on various devices.

## 5. Solution Overview Update
The solution is a single-page Angular application that will provide a user interface for basic arithmetic operations (addition, subtraction, multiplication, and division).  Error handling (specifically for division by zero) is a key feature.

## 6. Functional Requirements Update
The functional requirements are detailed in the analysis document (`.sureai/analysis.md`).

## 7. Non-Functional Requirements Update
The non-functional requirements are also detailed in the analysis document (`.sureai/analysis.md`).

## 8. Epic Stories Update
### Epic 1: Basic Calculator Functionality
**Epic Description:** Implement the core functionality of the calculator, including basic arithmetic operations and error handling.
**Business Value:** Provides the fundamental functionality of the application.
**Acceptance Criteria:** All user stories within this epic are completed and tested successfully.

**User Stories:**
- **US-001:** As a user, I want to be able to add two numbers together so that I can perform basic arithmetic.
  - **Acceptance Criteria:** The application correctly adds two numbers provided by the user.
  - **Story Points:** 3
  - **Priority:** High
- **US-002:** As a user, I want to be able to subtract two numbers so that I can perform basic arithmetic.
  - **Acceptance Criteria:** The application correctly subtracts two numbers provided by the user.
  - **Story Points:** 3
  - **Priority:** High
- **US-003:** As a user, I want to be able to multiply two numbers so that I can perform basic arithmetic.
  - **Acceptance Criteria:** The application correctly multiplies two numbers provided by the user.
  - **Story Points:** 3
  - **Priority:** High
- **US-004:** As a user, I want to be able to divide two numbers so that I can perform basic arithmetic. I expect an appropriate error message if I try to divide by zero.
  - **Acceptance Criteria:** The application correctly divides two numbers provided by the user and displays an error message if the divisor is zero.
  - **Story Points:** 5
  - **Priority:** High
- **US-005:** As a user, I want a clear display showing the result of my calculations.
  - **Acceptance Criteria:** The application displays the results of calculations clearly and concisely.
  - **Story Points:** 2
  - **Priority:** High

## 9. User Interface Requirements Update
The UI should be clean, simple, and easy to navigate.  Wireframes and mockups will be created in a later iteration.

## 10. Technical Requirements Update
The technical requirements are detailed in the architecture (`.sureai/architecture_document.md`) and technology stack (`.sureai/tech_stack_document.md`) documents.

## 11. Success Metrics & KPIs Update
- Successful completion of all user stories.
- Positive user feedback on usability and functionality.
- Successful deployment to a hosting platform.

## 12. Risk Assessment Update
- Potential for bugs in the calculation logic.
- Challenges in achieving cross-browser compatibility.
- Difficulty in implementing a user-friendly UI.

## 13. Timeline & Milestones Update
The timeline and milestones will be developed in a later iteration.

## 14. Dependencies & Assumptions Update
- Familiarity with Angular framework.
- Access to a suitable development environment.
- Availability of appropriate testing resources.


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## PRD UPDATE - 2025-09-25 06:57:52

# Product Requirements Document (PRD) Update - 2025-09-25 07:45:00

## 8. Epic Stories Update

### Epic 2: UI/UX Design and Implementation
**Epic Description:** Design and implement the user interface for the calculator application.
**Business Value:** Provides a user-friendly and visually appealing interface for the calculator functionality.
**Acceptance Criteria:** All user stories within this epic are completed and the UI meets the defined design specifications.

**User Stories:**
- **US-006:** As a user, I want a visually appealing and easy-to-use calculator interface, so that I can easily perform calculations.
  - **Acceptance Criteria:**
    - [ ] The UI design is consistent with modern design standards.
    - [ ] Buttons are clearly labelled and easily accessible.
    - [ ] The display area is large enough to clearly show the input and results.
    - [ ] The UI design is responsive and works well on various devices.
  - **Story Points:** 5
  - **Priority:** High
- **US-007:** As a user, I want to be able to clear the input easily, so that I can correct mistakes without restarting the calculation.
  - **Acceptance Criteria:** A clear button exists to clear the current input.
  - **Story Points:** 2
  - **Priority:** Medium

## 9. User Interface Requirements Update
- The UI should follow Material Design guidelines, which ensure accessibility and consistency across other applications.
- All input fields must be validated to prevent unexpected behaviour (e.g., entering non-numerical data).
- The UI should be responsive and adjust layout based on screen size.  Bootstrap can help with this.
- Clear visual feedback should be provided to the user to reflect what actions are occurring and what the results are.
- The calculator should include a `C` button for clearing the input field.
- The calculator should be designed to be used with a mouse and keyboard.

## 10. Technical Requirements Update
- The project will be structured using Angular's recommended project structure (with feature modules if more features are added later).
- Component communication will utilise Angular's built-in mechanisms such as Input/Output decorators.
- Error handling should follow Angular's best practices, such as using `try-catch` blocks and handling exceptions gracefully.
- The project will use Jasmine and Karma for unit testing.

## 13. Timeline & Milestones Update
- **Phase 1 (Days 1-2):** UI Design and Development.  Focus on creating the user interface for the calculator, ensuring it is responsive and meets usability requirements.
- **Phase 2 (Days 3-4):** Core Functionality Implementation.  Develop the core calculator logic, ensuring correctness and error handling for all operations.
- **Phase 3 (Days 5-6):** Testing and Refinement.  Test all functionality thoroughly, implementing comprehensive unit and integration tests.
- **Phase 4 (Day 7):** Deployment and Release. Deploy the application to a chosen platform (e.g., GitHub Pages, Netlify).

## 14. Dependencies & Assumptions Update
- Familiarity with Angular framework and its associated tooling.
- Access to a development environment (Node.js, npm, Angular CLI).
- Basic understanding of Material Design guidelines for UI.

# Additional Notes
Generated: 2025-09-25 07:45:00
- Further epics can be created as additional features are identified (e.g., memory functions, scientific functions, etc.).
- Comprehensive user testing and feedback should be incorporated into the development process to ensure optimal usability and user satisfaction.
