# 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.

---

## PRD UPDATE - 2025-10-01 04:00:46

## Product Requirements Document (PRD) - To Do App Feature
Generated: 2025-10-01T04:40:40.000Z

### 1. Executive Summary
This document outlines the Product Requirements for the "To Do App" feature, an enhancement to the existing Angular Clarity Boilerplate. The To Do App will provide basic task management capabilities, including adding, viewing, marking as complete, and deleting tasks. It will utilize client-side `localStorage` for data persistence, serving as a functional demonstration of a new lazy-loaded feature module within the boilerplate, and offering immediate utility to developers and end-users alike.

### 2. Product Vision & Strategy
**Product Vision:** To integrate a practical, lightweight "To Do App" feature that showcases the modularity, extensibility, and UI capabilities of the Angular Clarity Boilerplate, while providing a useful tool for basic personal task management.
**Strategic Goals:**
1.  **Demonstrate Boilerplate Capabilities:** Highlight the ease of adding new lazy-loaded feature modules and leveraging the Clarity Design System.
2.  **Enhance Developer Experience:** Provide a clear, well-structured example of a CRUD feature implementation using Angular best practices.
3.  **Provide User Utility:** Offer a simple, effective tool for users to manage their daily tasks directly within the application.
**Success Metrics:**
*   Successful integration as a lazy-loaded module.
*   All core CRUD functionalities (add, view, complete, delete) are stable and bug-free.
*   Positive feedback on developer experience (e.g., clarity of code, ease of extension).
*   User adoption for basic task management (qualitative feedback).

### 3. Target Users & Personas
While the boilerplate's primary users are developers, the To Do App feature targets an **End-User Persona**:

**Persona: "Productive Paula"**
*   **Role:** An individual (developer, project manager, student, etc.) who uses the application daily.
*   **Demographics:** Tech-savvy, familiar with web applications, values simplicity and efficiency.
*   **Needs:**
    *   A simple way to quickly jot down tasks.
    *   A clear view of what needs to be done.
    *   The ability to mark tasks as completed.
    *   The option to remove old or irrelevant tasks.
*   **Pain Points:** Forgetting tasks, lack of a centralized place for quick notes within their current application environment.
*   **User Journey (for To Do App):**
    1.  Navigates to the "To Do" section.
    2.  Adds a new task using the input field.
    3.  Sees the task appear in the list.
    4.  Later, marks the task as complete using a checkbox.
    5.  Periodically reviews the list, deleting completed or unnecessary tasks.
    6.  Closes the application, expects tasks to be there on next visit.

### 4. Problem Statement
Users require a straightforward, integrated method within the application to manage personal tasks. The lack of a simple, persistent task management utility leads to users relying on external tools or losing track of immediate action items, reducing overall productivity and focus within the application environment.

### 5. Solution Overview
The "To Do App" will be implemented as a new lazy-loaded feature module within the Angular Clarity Boilerplate. It will feature a clean user interface utilizing the Clarity Design System, allowing users to:
*   Add new tasks via an input field.
*   View a list of active and completed tasks.
*   Mark tasks as complete/incomplete.
*   Delete tasks permanently.
All task data will be stored client-side using `localStorage` for persistence across browser sessions.

### 6. Functional Requirements
*   **FR-001: Task Creation:** The user shall be able to add a new task by entering text into an input field and confirming (e.g., by clicking an "Add" button or pressing Enter).
*   **FR-002: Task Display:** The system shall display a list of all current tasks, clearly distinguishing between active and completed tasks.
*   **FR-003: Task Completion Toggle:** The user shall be able to mark an active task as complete and a completed task as active (toggle functionality).
*   **FR-004: Task Deletion:** The user shall be able to delete an individual task from the list.
*   **FR-005: Client-Side Persistence:** All tasks (including their status) shall be stored in `localStorage` and persist across browser sessions. Tasks should automatically load upon application startup.
*   **FR-006: Input Validation:** The system shall prevent the addition of empty tasks.

### 7. Non-Functional Requirements
*   **NFR-001: Performance:** The To Do App UI should be responsive, with task additions, updates, and deletions reflecting immediately in the UI. Initial load time for the To Do module should be minimal due to lazy-loading.
*   **NFR-002: Usability (Developer Experience):** The code for the To Do App feature should be clean, well-documented, and follow Angular best practices to serve as an exemplary feature module.
*   **NFR-003: Usability (End-User Experience):** The user interface for task management should be intuitive and easy to navigate, leveraging Clarity UI components for a consistent experience.
*   **NFR-004: Maintainability:** The To Do App module should be structured to allow for easy updates, bug fixes, and future enhancements without impacting other parts of the boilerplate.
*   **NFR-005: Scalability:** The `TodoService` should be abstracted to allow for future integration with a backend API without significant refactoring of UI components.
*   **NFR-006: Extensibility:** The module should allow for future additions of features like task prioritization, due dates, or filtering.

### 8. Epic Stories

#### Epic 1: Task Input and Creation
**Epic Description:** This epic covers the functionality for users to efficiently add new tasks to their To Do list.
**Business Value:** Enables users to quickly capture and record their tasks, directly addressing the core need for task management and improving productivity.
**Acceptance Criteria:**
*   Users can add a new task via an input field.
*   Empty tasks cannot be added.
*   New tasks appear instantly in the task list.

**User Stories:**
-   **US-001:** Add a new task
  -   **As a** Productive Paula
  -   **I want to** type a task description into an input field and submit it
  -   **So that** I can quickly add a new task to my list
  -   **Acceptance Criteria:**
    -   [ ] Given I am on the To Do App page,
    -   [ ] When I type "Buy groceries" into the input field and click "Add Task" or press Enter,
    -   [ ] Then "Buy groceries" appears as a new, active task in the list.
    -   [ ] Given I am on the To Do App page,
    -   [ ] When I try to add an empty task (e.g., empty input and click "Add Task"),
    -   [ ] Then no new task is added, and an appropriate validation message may be displayed (e.g., input field turns red or a tooltip appears).
  -   **Story Points:** 3
  -   **Priority:** High

#### Epic 2: Task Display and Manipulation
**Epic Description:** This epic focuses on how tasks are displayed and how users interact with existing tasks (viewing, marking complete, deleting).
**Business Value:** Provides users with full control over their task list, allowing them to track progress and manage their commitments effectively.
**Acceptance Criteria:**
*   Tasks are clearly displayed, with differentiation between active and completed states.
*   Users can easily toggle task completion status.
*   Users can remove tasks from the list.
*   Task state is preserved across sessions.

**User Stories:**
-   **US-002:** View all tasks
  -   **As a** Productive Paula
  -   **I want to** see a list of all my added tasks, with completed tasks visibly differentiated
  -   **So that** I can easily track what needs to be done and what is already finished
  -   **Acceptance Criteria:**
    -   [ ] Given I have active and completed tasks,
    -   [ ] When I navigate to the To Do App page,
    -   [ ] Then all my tasks are displayed, and completed tasks are styled differently (e.g., strikethrough, greyed out).
    -   [ ] Tasks are displayed in the order they were created (newest at the top/bottom, or configurable).
  -   **Story Points:** 2
  -   **Priority:** High

-   **US-003:** Mark a task as complete/incomplete
  -   **As a** Productive Paula
  -   **I want to** click a checkbox or toggle switch next to a task
  -   **So that** I can mark it as complete when finished, or incomplete if I need to revisit it
  -   **Acceptance Criteria:**
    -   [ ] Given I have an active task,
    -   [ ] When I click its completion control (e.g., checkbox),
    -   [ ] Then the task's status changes to completed, and its visual styling updates accordingly.
    -   [ ] Given I have a completed task,
    -   [ ] When I click its completion control,
    -   [ ] Then the task's status changes back to active, and its visual styling updates accordingly.
  -   **Story Points:** 2
  -   **Priority:** High

-   **US-004:** Delete a task
  -   **As a** Productive Paula
  -   **I want to** click a delete icon or button next to a task
  -   **So that** I can remove tasks that are no longer relevant or needed
  -   **Acceptance Criteria:**
    -   [ ] Given I have a task in my list,
    -   [ ] When I click the "Delete" button next to it,
    -   [ ] Then the task is immediately removed from the list.
    -   [ ] The deleted task does not reappear upon page refresh.
  -   **Story Points:** 1
  -   **Priority:** High

#### Epic 3: Data Persistence
**Epic Description:** This epic ensures that the user's task data is saved and loaded correctly across application sessions.
**Business Value:** Provides a reliable and consistent user experience, ensuring that users do not lose their task progress and can always pick up where they left off.
**Acceptance Criteria:**
*   All task changes are saved.
*   Tasks are reloaded correctly after closing and reopening the browser.

**User Stories:**
-   **US-005:** Persist tasks client-side
  -   **As a** Productive Paula
  -   **I want to** have my tasks and their completion status saved locally
  -   **So that** my list is preserved even if I close and reopen the browser or navigate away from the app
  -   **Acceptance Criteria:**
    -   [ ] Given I have added, completed, or deleted tasks,
    -   [ ] When I close and then reopen the browser or navigate away and back to the application,
    -   [ ] Then my task list appears exactly as it was when I left it.
  -   **Story Points:** 5
  -   **Priority:** High

### 9. User Interface Requirements
*   **Clarity Design System:** All UI components (input fields, buttons, checkboxes, list items, layout) shall conform to the VMware Clarity Design System for consistency.
*   **Responsive Design:** The To Do App interface should be fully responsive and function well on various screen sizes (desktop, tablet, mobile).
*   **Task Input:** A clear input field (e.g., `clr-input-container`) for adding tasks, accompanied by an "Add" button (e.g., `clr-button`).
*   **Task List:** Tasks should be displayed in a vertical list (e.g., `clr-list` or a custom `div` structure).
*   **Task Item:** Each task item shall include:
    *   A checkbox (e.g., `clr-checkbox-wrapper`) or toggle to mark completion.
    *   The task description text.
    *   A delete icon/button (e.g., `clr-icon` with `close` shape or `clr-button`) for removal.
*   **Visual Cues:** Completed tasks should have a distinct visual style (e.g., strikethrough text, faded color).

### 10. Technical Requirements
*   **Angular Module:** The To Do App shall be implemented as a lazy-loaded `TodoModule` within the `src/app/features` directory.
*   **Component Structure:** Components (`TodoPageComponent`, `TodoInputComponent`, `TodoListComponent`, `TodoItemComponent`) will adhere to the structure defined in `architecture_document.md`.
*   **Data Service:** A `TodoService` shall manage all task CRUD operations and `localStorage` interactions, exposing tasks via an RxJS `BehaviorSubject`.
*   **Client-Side Persistence:** `localStorage` will be used for data storage. Tasks will be serialized to JSON before saving and deserialized upon loading.
*   **Unique IDs:** Each task must have a unique identifier (e.g., using `Date.now().toString()` or a UUID library).
*   **TypeScript Interfaces:** A `Task` interface will define the structure of task objects (`id`, `description`, `completed`, `createdAt`).
*   **RxJS:** Used for reactive programming, especially for managing the task list observable.

### 11. Success Metrics & KPIs
*   **Feature Completeness:** 100% of defined functional requirements implemented and tested.
*   **Code Quality:** Adherence to Angular style guides and linting rules (ESLint, Prettier). Maintainability score (e.g., code complexity metrics).
*   **Performance:** UI updates (add, complete, delete) occur within 100ms.
*   **User Feedback:** Qualitative feedback from developers leveraging the boilerplate regarding the utility and clarity of the To Do App example.

### 12. Risk Assessment
*   **R-001: `localStorage` Limitations:**
    *   **Risk:** `localStorage` is client-side, susceptible to browser clearing, limited storage, and not suitable for sensitive data or multi-user scenarios.
    *   **Mitigation:** Clearly document these limitations. Emphasize that for robust/enterprise solutions, the `TodoService` is designed to be easily swappable with a backend API integration.
*   **R-002: Scalability with Many Tasks:**
    *   **Risk:** Performance degradation with an extremely large number of tasks stored in `localStorage` or rendered in the UI without virtualization.
    *   **Mitigation:** For initial MVP, this is acceptable. For future enhancements, consider pagination, filtering, or virtual scrolling if performance becomes an issue with large datasets.
*   **R-003: Browser Compatibility:**
    *   **Risk:** Inconsistent `localStorage` behavior or UI rendering across different browsers.
    *   **Mitigation:** Standard browser testing (Chrome, Firefox, Edge, Safari) and adherence to Clarity Design System which handles cross-browser compatibility.

### 13. Timeline & Milestones
*   **Phase 1: Discovery & PRD Finalization (Current - Week 1)**
    *   Complete detailed PRD for To Do App.
    *   Review and alignment with project stakeholders (conceptual).
    *   **Deliverable:** Approved `.sureai/prd_document.md` update.
*   **Phase 2: Technical Design & Module Setup (Week 2)**
    *   Finalize `TodoModule` structure and `TodoService` interface.
    *   Implement initial `localStorage` integration.
    *   **Deliverable:** Scaffolded `TodoModule`, basic `TodoService`, `Task` interface.
*   **Phase 3: Core Functionality Development (Week 3-4)**
    *   Implement `TodoInputComponent` and `TodoService.addTask()`.
    *   Implement `TodoListComponent`, `TodoItemComponent`, and `TodoService` methods for viewing, toggling, and deleting tasks.
    *   **Deliverable:** Functional To Do App with all CRUD operations and client-side persistence.
*   **Phase 4: UI/UX Refinement & Testing (Week 5)**
    *   Apply Clarity Design System components and styling.
    *   Implement responsive design.
    *   Perform unit and integration testing.
    *   **Deliverable:** Polished, tested To Do App feature.
*   **Phase 5: Documentation & Release (Week 6)**
    *   Update boilerplate documentation to include To Do App usage and extension.
    *   Prepare for merge into the main boilerplate branch.
    *   **Deliverable:** Integrated and documented To Do App feature.

### 14. Dependencies & Assumptions
*   **Dependencies:**
    *   Existing Angular Clarity Boilerplate with `CoreModule` and `SharedModule`.
    *   Angular CLI for project generation and builds.
    *   Node.js and npm for package management.
    *   Modern web browser supporting `localStorage`.
*   **Assumptions:**
    *   The "To Do App" will be a single-user, client-side application.
    *   Data stored in `localStorage` does not require encryption or advanced security.
    *   The current scope does not include backend integration; future backend integration would be a separate project phase.


---

## PRD UPDATE - 2025-10-01 04:02:35

# Product Requirements Document (PRD)
Generated: 2025-10-01T04:40:40.000Z

## 1. Executive Summary
This document outlines the Product Requirements for the "To Do App" feature, an enhancement to the existing Angular Clarity Boilerplate. The To Do App will provide basic task management capabilities, including adding, viewing, marking as complete, and deleting tasks. It will utilize client-side `localStorage` for data persistence, serving as a functional demonstration of a new lazy-loaded feature module within the boilerplate, and offering immediate utility to developers and end-users alike.

## 2. Product Vision & Strategy
**Product Vision:** To integrate a practical, lightweight "To Do App" feature that showcases the modularity, extensibility, and UI capabilities of the Angular Clarity Boilerplate, while providing a useful tool for basic personal task management.
**Strategic Goals:**
1.  **Demonstrate Boilerplate Capabilities:** Highlight the ease of adding new lazy-loaded feature modules and leveraging the Clarity Design System.
2.  **Enhance Developer Experience:** Provide a clear, well-structured example of a CRUD feature implementation using Angular best practices.
3.  **Provide User Utility:** Offer a simple, effective tool for users to manage their daily tasks directly within the application.
**Success Metrics:**
*   Successful integration as a lazy-loaded module.
*   All core CRUD functionalities (add, view, complete, delete) are stable and bug-free.
*   Positive feedback on developer experience (e.g., clarity of code, ease of extension).
*   User adoption for basic task management (qualitative feedback).

## 3. Target Users & Personas
While the boilerplate's primary users are developers, the To Do App feature targets an **End-User Persona**:

**Persona: "Productive Paula"**
*   **Role:** An individual (developer, project manager, student, etc.) who uses the application daily.
*   **Demographics:** Tech-savvy, familiar with web applications, values simplicity and efficiency.
*   **Needs:**
    *   A simple way to quickly jot down tasks.
    *   A clear view of what needs to be done.
    *   The ability to mark tasks as completed.
    *   The option to remove old or irrelevant tasks.
*   **Pain Points:** Forgetting tasks, lack of a centralized place for quick notes within their current application environment.
*   **User Journey (for To Do App):**
    1.  Navigates to the "To Do" section.
    2.  Adds a new task using the input field.
    3.  Sees the task appear in the list.
    4.  Later, marks the task as complete using a checkbox.
    5.  Periodically reviews the list, deleting completed or unnecessary tasks.
    6.  Closes the application, expects tasks to be there on next visit.

## 4. Problem Statement
Users require a straightforward, integrated method within the application to manage personal tasks. The lack of a simple, persistent task management utility leads to users relying on external tools or losing track of immediate action items, reducing overall productivity and focus within the application environment.

## 5. Solution Overview
The "To Do App" will be implemented as a new lazy-loaded feature module within the Angular Clarity Boilerplate. It will feature a clean user interface utilizing the Clarity Design System, allowing users to:
*   Add new tasks via an input field.
*   View a list of active and completed tasks.
*   Mark tasks as complete/incomplete.
*   Delete tasks permanently.
All task data will be stored client-side using `localStorage` for persistence across browser sessions.

## 6. Functional Requirements
*   **FR-001: Task Creation:** The user shall be able to add a new task by entering text into an input field and confirming (e.g., by clicking an "Add" button or pressing Enter).
*   **FR-002: Task Display:** The system shall display a list of all current tasks, clearly distinguishing between active and completed tasks.
*   **FR-003: Task Completion Toggle:** The user shall be able to mark an active task as complete and a completed task as active (toggle functionality).
*   **FR-004: Task Deletion:** The user shall be able to delete an individual task from the list.
*   **FR-005: Client-Side Persistence:** All tasks (including their status) shall be stored in `localStorage` and persist across browser sessions. Tasks should automatically load upon application startup.
*   **FR-006: Input Validation:** The system shall prevent the addition of empty tasks.

## 7. Non-Functional Requirements
*   **NFR-001: Performance:** The To Do App UI should be responsive, with task additions, updates, and deletions reflecting immediately in the UI. Initial load time for the To Do module should be minimal due to lazy-loading.
*   **NFR-002: Usability (Developer Experience):** The code for the To Do App feature should be clean, well-documented, and follow Angular best practices to serve as an exemplary feature module.
*   **NFR-003: Usability (End-User Experience):** The user interface for task management should be intuitive and easy to navigate, leveraging Clarity UI components for a consistent experience.
*   **NFR-004: Maintainability:** The To Do App module should be structured to allow for easy updates, bug fixes, and future enhancements without impacting other parts of the boilerplate.
*   **NFR-005: Scalability:** The `TodoService` should be abstracted to allow for future integration with a backend API without significant refactoring of UI components.
*   **NFR-006: Extensibility:** The module should allow for future additions of features like task prioritization, due dates, or filtering.

## 8. Epic Stories

### Epic 1: Task Input and Creation
**Epic Description:** This epic covers the functionality for users to efficiently add new tasks to their To Do list.
**Business Value:** Enables users to quickly capture and record their tasks, directly addressing the core need for task management and improving productivity.
**Acceptance Criteria:**
*   Users can add a new task via an input field.
*   Empty tasks cannot be added.
*   New tasks appear instantly in the task list.

**User Stories:**
-   **US-001:** Add a new task
  -   **As a** Productive Paula
  -   **I want to** type a task description into an input field and submit it
  -   **So that** I can quickly add a new task to my list
  -   **Acceptance Criteria:**
    -   [ ] Given I am on the To Do App page,
    -   [ ] When I type "Buy groceries" into the input field and click "Add Task" or press Enter,
    -   [ ] Then "Buy groceries" appears as a new, active task in the list.
    -   [ ] Given I am on the To Do App page,
    -   [ ] When I try to add an empty task (e.g., empty input and click "Add Task"),
    -   [ ] Then no new task is added, and an appropriate validation message may be displayed (e.g., input field turns red or a tooltip appears).
  -   **Story Points:** 3
  -   **Priority:** High

### Epic 2: Task Display and Manipulation
**Epic Description:** This epic focuses on how tasks are displayed and how users interact with existing tasks (viewing, marking complete, deleting).
**Business Value:** Provides users with full control over their task list, allowing them to track progress and manage their commitments effectively.
**Acceptance Criteria:**
*   Tasks are clearly displayed, with differentiation between active and completed states.
*   Users can easily toggle task completion status.
*   Users can remove tasks from the list.
*   Task state is preserved across sessions.

**User Stories:**
-   **US-002:** View all tasks
  -   **As a** Productive Paula
  -   **I want to** see a list of all my added tasks, with completed tasks visibly differentiated
  -   **So that** I can easily track what needs to be done and what is already finished
  -   **Acceptance Criteria:**
    -   [ ] Given I have active and completed tasks,
    -   [ ] When I navigate to the To Do App page,
    -   [ ] Then all my tasks are displayed, and completed tasks are styled differently (e.g., strikethrough, greyed out).
    -   [ ] Tasks are displayed in the order they were created (newest at the top/bottom, or configurable).
  -   **Story Points:** 2
  -   **Priority:** High

-   **US-003:** Mark a task as complete/incomplete
  -   **As a** Productive Paula
  -   **I want to** click a checkbox or toggle switch next to a task
  -   **So that** I can mark it as complete when finished, or incomplete if I need to revisit it
  -   **Acceptance Criteria:**
    -   [ ] Given I have an active task,
    -   [ ] When I click its completion control (e.g., checkbox),
    -   [ ] Then the task's status changes to completed, and its visual styling updates accordingly.
    -   [ ] Given I have a completed task,
    -   [ ] When I click its completion control,
    -   [ ] Then the task's status changes back to active, and its visual styling updates accordingly.
  -   **Story Points:** 2
  -   **Priority:** High

-   **US-004:** Delete a task
  -   **As a** Productive Paula
  -   **I want to** click a delete icon or button next to a task
  -   **So that** I can remove tasks that are no longer relevant or needed
  -   **Acceptance Criteria:**
    -   [ ] Given I have a task in my list,
    -   [ ] When I click the "Delete" button next to it,
    -   [ ] Then the task is immediately removed from the list.
    -   [ ] The deleted task does not reappear upon page refresh.
  -   **Story Points:** 1
  -   **Priority:** High

### Epic 3: Data Persistence
**Epic Description:** This epic ensures that the user's task data is saved and loaded correctly across application sessions.
**Business Value:** Provides a reliable and consistent user experience, ensuring that users do not lose their task progress and can always pick up where they left off.
**Acceptance Criteria:**
*   All task changes are saved.
*   Tasks are reloaded correctly after closing and reopening the browser.

**User Stories:**
-   **US-005:** Persist tasks client-side
  -   **As a** Productive Paula
  -   **I want to** have my tasks and their completion status saved locally
  -   **So that** my list is preserved even if I close and reopen the browser or navigate away from the app
  -   **Acceptance Criteria:**
    -   [ ] Given I have added, completed, or deleted tasks,
    -   [ ] When I close and then reopen the browser or navigate away and back to the application,
    -   [ ] Then my task list appears exactly as it was when I left it.
  -   **Story Points:** 5
  -   **Priority:** High

## 9. User Interface Requirements
*   **Clarity Design System:** All UI components (input fields, buttons, checkboxes, list items, layout) shall conform to the VMware Clarity Design System for consistency.
*   **Responsive Design:** The To Do App interface should be fully responsive and function well on various screen sizes (desktop, tablet, mobile).
*   **Task Input:** A clear input field (e.g., `clr-input-container`) for adding tasks, accompanied by an "Add" button (e.g., `clr-button`).
*   **Task List:** Tasks should be displayed in a vertical list (e.g., `clr-list` or a custom `div` structure).
*   **Task Item:** Each task item shall include:
    *   A checkbox (e.g., `clr-checkbox-wrapper`) or toggle to mark completion.
    *   The task description text.
    *   A delete icon/button (e.g., `clr-icon` with `close` shape or `clr-button`) for removal.
*   **Visual Cues:** Completed tasks should have a distinct visual style (e.g., strikethrough text, faded color).

## 10. Technical Requirements
*   **Angular Module:** The To Do App shall be implemented as a lazy-loaded `TodoModule` within the `src/app/features` directory.
*   **Component Structure:** Components (`TodoPageComponent`, `TodoInputComponent`, `TodoListComponent`, `TodoItemComponent`) will adhere to the structure defined in `architecture_document.md`.
*   **Data Service:** A `TodoService` shall manage all task CRUD operations and `localStorage` interactions, exposing tasks via an RxJS `BehaviorSubject`.
*   **Client-Side Persistence:** `localStorage` will be used for data storage. Tasks will be serialized to JSON before saving and deserialized upon loading.
*   **Unique IDs:** Each task must have a unique identifier (e.g., using `Date.now().toString()` or a UUID library).
*   **TypeScript Interfaces:** A `Task` interface will define the structure of task objects (`id`, `description`, `completed`, `createdAt`).
*   **RxJS:** Used for reactive programming, especially for managing the task list observable.

## 11. Success Metrics & KPIs
*   **Feature Completeness:** 100% of defined functional requirements implemented and tested.
*   **Code Quality:** Adherence to Angular style guides and linting rules (ESLint, Prettier). Maintainability score (e.g., code complexity metrics).
*   **Performance:** UI updates (add, complete, delete) occur within 100ms.
*   **User Feedback:** Qualitative feedback from developers leveraging the boilerplate regarding the utility and clarity of the To Do App example.

## 12. Risk Assessment
*   **R-001: `localStorage` Limitations:**
    *   **Risk:** `localStorage` is client-side, susceptible to browser clearing, limited storage, and not suitable for sensitive data or multi-user scenarios.
    *   **Mitigation:** Clearly document these limitations. Emphasize that for robust/enterprise solutions, the `TodoService` is designed to be easily swappable with a backend API integration.
*   **R-002: Scalability with Many Tasks:**
    *   **Risk:** Performance degradation with an extremely large number of tasks stored in `localStorage` or rendered in the UI without virtualization.
    *   **Mitigation:** For initial MVP, this is acceptable. For future enhancements, consider pagination, filtering, or virtual scrolling if performance becomes an issue with large datasets.
*   **R-003: Browser Compatibility:**
    *   **Risk:** Inconsistent `localStorage` behavior or UI rendering across different browsers.
    *   **Mitigation:** Standard browser testing (Chrome, Firefox, Edge, Safari) and adherence to Clarity Design System which handles cross-browser compatibility.

## 13. Timeline & Milestones
*   **Phase 1: Discovery & PRD Finalization (Current - Week 1)**
    *   Complete detailed PRD for To Do App.
    *   Review and alignment with project stakeholders (conceptual).
    *   **Deliverable:** Approved `.sureai/prd_document.md` update.
*   **Phase 2: Technical Design & Module Setup (Week 2)**
    *   Finalize `TodoModule` structure and `TodoService` interface.
    *   Implement initial `localStorage` integration.
    *   **Deliverable:** Scaffolded `TodoModule`, basic `TodoService`, `Task` interface.
*   **Phase 3: Core Functionality Development (Week 3-4)**
    *   Implement `TodoInputComponent` and `TodoService.addTask()`.
    *   Implement `TodoListComponent`, `TodoItemComponent`, and `TodoService` methods for viewing, toggling, and deleting tasks.
    *   **Deliverable:** Functional To Do App with all CRUD operations and client-side persistence.
*   **Phase 4: UI/UX Refinement & Testing (Week 5)**
    *   Apply Clarity Design System components and styling.
    *   Implement responsive design.
    *   Perform unit and integration testing.
    *   **Deliverable:** Polished, tested To Do App feature.
*   **Phase 5: Documentation & Release (Week 6)**
    *   Update boilerplate documentation to include To Do App usage and extension.
    *   Prepare for merge into the main boilerplate branch.
    *   **Deliverable:** Integrated and documented To Do App feature.

## 14. Dependencies & Assumptions
*   **Dependencies:**
    *   Existing Angular Clarity Boilerplate with `CoreModule` and `SharedModule`.
    *   Angular CLI for project generation and builds.
    *   Node.js and npm for package management.
    *   Modern web browser supporting `localStorage`.
*   **Assumptions:**
    *   The "To Do App" will be a single-user, client-side application.
    *   Data stored in `localStorage` does not require encryption or advanced security.
    *   The current scope does not include backend integration; future backend integration would be a separate project phase.

