Cursor context for BuildApp MVP

gistfile1.txt

## 1. Project Definition

**projectName**: BuildApp

**projectObjective**: Create a service that connects homeowners seeking renovation with verified professionals, offering AI-generated quotes, visual renovation suggestions, secure payments via escrow, and an integrated project management platform.

**targetMVPFeatures**:

- User management (CRUD operations)
- Registration (client and renovation professional)
- Service request system (prompt, photo/video upload, or search criteria)
- AI-generated quotes based on renovation requirements
- AI-generated renovation style suggestions from client photos/videos
- Project-based chat between clients and professionals
- Escrow payment system to guarantee secure transactions
- Digital contract creation and management (budget, timeline, conditions)

**targetUserScope**: Multi-User system with three persona types:

1. **Clients** - Homeowners seeking renovation services
2. **Professionals** - Verified renovation specialists
3. **Administrators** - Platform managers

System requires authentication (including social media sign-in) and role-based authorization.

## 2. Tech Stack Choices

**backend**: Python with FastAPI

- **Rationale**: FastAPI offers excellent performance, automatic API documentation, type checking, and asynchronous support perfect for handling AI integrations and real-time features.

**frontend**: React for web application

- **Future mobile consideration**: React Native, Flutter, or native development for iOS/Android

**database**: PostgreSQL

- **Rationale**: Strong relational capabilities for complex domain relationships, excellent spatial indexing (PostGIS) for location-based features, and strong JSON support for flexible data.

**orm**: SQLAlchemy with Pydantic

- **Rationale**: SQLAlchemy provides powerful querying and transaction management, while Pydantic offers validation and serialization ideal for API interfaces.

**uiLibrary**: shadcn/ui or Material UI, use Tailwind for CSS 

- **Rationale**: Both provide comprehensive component libraries that can be easily customized for the BuildApp branding.

**packageManager**:

- Frontend: pnpm (better dependency management and disk space efficiency)
- Backend: Poetry (dependency management and packaging in Python)

**authentication**: JWT with OAuth2 for social sign-in

- **Rationale**: Industry-standard approach that allows for both session management and social media authentication.

**AI Integration**: OpenAI API for quote generation and design recommendations

- **Rationale**: Using OpenAI provides the shortest path to get something up and running quickly.

**paymentProcessing**: Stripe for escrow payments

- **Rationale**: Stripe Connect API supports holding funds until project milestones are completed.

## 3. Core Data Models (MVP Scope Only)

**modelName**: User

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Unique user ID (clients and professionals) |
| name | VARCHAR | Full name |
| email | VARCHAR | Unique email (login) |
| password\_hash | VARCHAR | Hashed password |
| role | ENUM | `client` or `professional` (or `admin`) |
| language\_pref | VARCHAR | Preferred language code (e.g. `en`, `es`) |
| currency\_pref | VARCHAR | Preferred currency (e.g. `USD`, `EUR`) |
| location\_lat | DECIMAL | Home/office latitude (for professionals) |
| location\_lon | DECIMAL | Home/office longitude |
| created\_at | TIMESTAMP | Account creation timestamp |

**modelName**: ProfessionalProfile (one-to-one with User for professionals)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| user\_id (PK,FK) | UUID | References User(id) |
| bio | TEXT | Professional bio / description |
| skills | TEXT | Comma-separated skills or JSON array of skills |
| certifications | TEXT | Certification/license descriptions or doc URLs |
| rating\_avg | FLOAT | Average rating (computed from Review) |
| rating\_count | INT | Number of ratings |

**modelName**: Document (verification and project files)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Document ID |
| user\_id | UUID | (FK) Owner User ID (for profile docs) |
| project\_id | UUID | (FK) Project ID (for project-related files) |
| type | VARCHAR | Doc type (e.g. `license`, `photo`, `contract`) |
| file\_url | VARCHAR | URL or storage path to the file |
| uploaded\_at | TIMESTAMP | Upload timestamp |

**modelName**: Project

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Project ID |
| client\_id | UUID | (FK) User who created the project |
| professional\_id | UUID | (FK) Assigned professional (nullable until assigned) |
| title | VARCHAR | Project title |
| description | TEXT | Detailed description |
| address | VARCHAR | Project address (street) |
| location\_lat | DECIMAL | Project location latitude |
| location\_lon | DECIMAL | Project location longitude |
| category | VARCHAR | Project category/type (plumbing, electrical, etc.) |
| budget | NUMERIC | Budget or estimated cost |
| currency | VARCHAR | Currency for budget (e.g. `USD`) |
| status | ENUM | `draft`,`open`,`quoted`,`contracted`,`in_progress`,`completed`,`cancelled` |
| start\_date | DATE | Planned start |
| end\_date | DATE | Planned end |
| created\_at | TIMESTAMP | Created timestamp |

**modelName**: Quote (bids from professionals)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Quote ID |
| project\_id | UUID | (FK) Project |
| professional\_id | UUID | (FK) User (professional who quoted) |
| amount | NUMERIC | Quoted amount (numeric) |
| currency | VARCHAR | Currency (matches project) |
| details | TEXT | Quote details/description |
| status | ENUM | `pending`,`accepted`,`rejected` |
| created\_at | TIMESTAMP | Created timestamp |

**modelName**: Contract

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Contract ID |
| project\_id | UUID | (FK) Project |
| terms\_url | VARCHAR | URL/file for contract terms |
| signed\_by\_client | BOOLEAN | Whether client signed |
| signed\_by\_professional | BOOLEAN | Whether professional signed |
| signed\_at\_client | TIMESTAMP | When client signed |
| signed\_at\_professional | TIMESTAMP | When professional signed |
| created\_at | TIMESTAMP | Created timestamp |

**modelName**: Payment (Escrow)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Payment ID |
| project\_id | UUID | (FK) Project |
| amount | NUMERIC | Amount (numeric) |
| currency | VARCHAR | Currency |
| stripe\_payment\_id | VARCHAR | Stripe paymentIntent or charge ID |
| status | ENUM | `pending`,`paid`,`refunded` |
| created\_at | TIMESTAMP | Created timestamp |
| released\_at | TIMESTAMP | When funds released to pro (if any) |

**modelName**: StyleSuggestion

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Suggestion ID |
| project\_id | UUID | (FK) Associated project |
| prompt\_text | TEXT | Text description used to generate the suggestion |
| suggestion\_text | TEXT | AI-generated description of suggested renovation style |
| image\_url | VARCHAR | URL to AI-generated visualization |
| created\_at | TIMESTAMP | Created timestamp |

**modelName**: InsuranceOption

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Insurance option ID |
| name | VARCHAR | Provider name or plan name |
| description | TEXT | Plan details |
| provider | VARCHAR | Insurance provider |

**modelName**: ProjectInsurance (chosen by project)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Record ID |
| project\_id | UUID | (FK) Project |
| insurance\_option\_id | UUID | (FK) InsuranceOption |
| purchased\_at | TIMESTAMP | Purchase timestamp (nullable) |
| policy\_url | VARCHAR | URL to policy document |

**modelName**: Message (project communication)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Message ID |
| project\_id | UUID | (FK) Project |
| sender\_id | UUID | (FK) User ID of sender |
| content | TEXT | Text content |
| sent\_at | TIMESTAMP | Timestamp |

**modelName**: Attachment (files/photos in messages or project)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Attachment ID |
| message\_id | UUID | (FK) Message |
| file\_url | VARCHAR | URL or path to file |
| file\_type | VARCHAR | MIME type or category (e.g. `image/png`) |
| uploaded\_at | TIMESTAMP | Upload timestamp |

**modelName**: Review (ratings/reviews of professionals)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Review ID |
| reviewer\_id | UUID | (FK) User who wrote review (client) |
| reviewee\_id | UUID | (FK) User being reviewed (professional) |
| project\_id | UUID | (FK) Project (nullable; could link review to a project) |
| rating | INT | Rating (e.g. 1–5 stars) |
| comment | TEXT | Optional review comment |
| created\_at | TIMESTAMP | Timestamp |

**modelName**: Promotion (incentives/discounts)

**fields**:

| Field | Type | Description |
| --- | --- | --- |
| id (PK) | UUID | Promotion ID |
| user\_id | UUID | (FK) User receiving promotion |
| type | VARCHAR | `premium_listing` or `discount` etc. |
| details | TEXT | Description or metadata |
| discount\_pct | INT | Discount percentage (for coupons) |
| valid\_until | DATE | Expiration date (if applicable) |

**Diagram**

The following is a Mermaid program that shows the relationships between entities.

```mermaid
      erDiagram
User ||--o| ProfessionalProfile : has
User ||--o{ Document : uploads
User ||--o{ Project : creates_as_client
User ||--o{ Project : assigned_as_professional
User ||--o{ Review : writes_as_reviewer
User ||--o{ Review : receives_as_reviewee
User ||--o{ Promotion : receives
User ||--o{ Message : sends
User ||--o{ Quote : submits

    Project ||--o{ Document : contains
    Project ||--o{ Quote : receives
    Project ||--o| Contract : has
    Project ||--o{ Payment : processes
    Project ||--o{ ProjectInsurance : purchases
    Project ||--o{ Message : contains
    Project ||--o{ Review : generates
    Project ||--o{ StyleSuggestion : receives

    Message ||--o{ Attachment : includes

    InsuranceOption ||--o{ ProjectInsurance : selected_for

    User {
        UUID id PK
        VARCHAR name
        VARCHAR email
        VARCHAR password_hash
        ENUM role
        VARCHAR language_pref
        VARCHAR currency_pref
        DECIMAL location_lat
        DECIMAL location_lon
        TIMESTAMP created_at
    }

    ProfessionalProfile {
        UUID user_id PK,FK
        TEXT bio
        TEXT skills
        TEXT certifications
        FLOAT rating_avg
        INT rating_count
    }

    Document {
        UUID id PK
        UUID user_id FK
        UUID project_id FK
        VARCHAR type
        VARCHAR file_url
        TIMESTAMP uploaded_at
    }

    Project {
        UUID id PK
        UUID client_id FK
        UUID professional_id FK
        VARCHAR title
        TEXT description
        VARCHAR address
        DECIMAL location_lat
        DECIMAL location_lon
        VARCHAR category
        NUMERIC budget
        VARCHAR currency
        ENUM status
        DATE start_date
        DATE end_date
        TIMESTAMP created_at
    }

    Quote {
        UUID id PK
        UUID project_id FK
        UUID professional_id FK
        NUMERIC amount
        VARCHAR currency
        TEXT details
        ENUM status
        TIMESTAMP created_at
    }

    Contract {
        UUID id PK
        UUID project_id FK
        VARCHAR terms_url
        BOOLEAN signed_by_client
        BOOLEAN signed_by_professional
        TIMESTAMP signed_at_client
        TIMESTAMP signed_at_professional
        TIMESTAMP created_at
    }

    Payment {
        UUID id PK
        UUID project_id FK
        NUMERIC amount
        VARCHAR currency
        VARCHAR stripe_payment_id
        ENUM status
        TIMESTAMP created_at
        TIMESTAMP released_at
    }

    StyleSuggestion {
        UUID id PK
        UUID project_id FK
        TEXT prompt_text
        TEXT suggestion_text
        VARCHAR image_url
        TIMESTAMP created_at
    }

    InsuranceOption {
        UUID id PK
        VARCHAR name
        TEXT description
        VARCHAR provider
    }

    ProjectInsurance {
        UUID id PK
        UUID project_id FK
        UUID insurance_option_id FK
        TIMESTAMP purchased_at
        VARCHAR policy_url
    }

    Message {
        UUID id PK
        UUID project_id FK
        UUID sender_id FK
        TEXT content
        TIMESTAMP sent_at
    }

    Attachment {
        UUID id PK
        UUID message_id FK
        VARCHAR file_url
        VARCHAR file_type
        TIMESTAMP uploaded_at
    }

    Review {
        UUID id PK
        UUID reviewer_id FK
        UUID reviewee_id FK
        UUID project_id FK
        INT rating
        TEXT comment
        TIMESTAMP created_at
    }

    Promotion { 
        DATE valid_until
    }
      
```

## 4. Core API Endpoints (MVP Scope Only)

We design a JSON/HTTP API (versioned, e.g. `/api/v1`) using standard REST principles. Authentication is handled via token (e.g. JWT/OAuth2). Key resources and endpoints include:

### Authentication & Users

- **POST** `/auth/register` – Register new user (client or professional). Request body includes name, email, password, role.
- **POST** `/auth/login` – Authenticate and obtain a JWT token.
- **GET** `/users/{userId}` – Get user profile (authenticated).
- **PUT** `/users/{userId}` – Update profile (name, location, prefs).

*Example:* `POST /auth/register` with `{ name, email, password, role, location_lat, location_lon, language_pref }`. Returns user data and token.

### Professional Profiles & Search

- **GET** `/professionals` – List professionals with optional filters: `?category=plumbing&skill=tiling&lat=...&lon=...&radius=...`. Supports pagination, sorting. (Location-based search uses spatial index for radius filter.)
- **GET** `/professionals/{id}` – Get professional profile (public info: bio, skills, ratings, reviews).
- **PUT** `/professionals/{id}` – Update professional-specific info (bio, skills, certifications).
- **POST** `/professionals/{id}/documents` – Upload verification document (license, certificate).

*Usage:* Clients search professionals by location and skills; compatibility filters (category match). Geospatial query uses spatial index (e.g. PostGIS) for fast radius search.

### Projects & Quotes

- **POST** `/projects` – Create new project (client). Includes title, description, location, category, budget.
- **GET** `/projects/{id}` – Get project details (only client or assigned pro can view).
- **PUT** `/projects/{id}` – Update project (status changes, accept quote, assign professional).
- **GET** `/projects/{id}/quotes` – List quotes for project.
- **POST** `/projects/{id}/quotes` – Submit a quote (professional bids on an open project).

*Example:* A client creates a project, pros see it and POST quotes via `/projects/123/quotes`.

- **POST** `/projects/{id}/style-suggestions` – (Client) Submit project photos to generate design suggestions. Triggers external AI service; response returns suggestion_text and image_url from AI model. This is implemented as an asynchronous call: server enqueues images to AI API and stores results in **StyleSuggestion**.
- **POST** `/projects/{id}/contract` – Client or professional uploads signed contract (document URL in body).
- **GET** `/projects/{id}/contract` – Retrieve contract status/urls.
- **PUT** `/projects/{id}/contract/sign` – Mark contract signed by user (records signed_at timestamp).
- **POST** `/projects/{id}/payments` – Initiate payment (client pays deposit to escrow via Stripe). Body: amount. The server creates a Stripe paymentIntent (manual capture) and returns `stripe_payment_intent_id`.
- **GET** `/projects/{id}/payments` – Get payment status. Stripe's Connect API is used so the platform holds funds until release.
- **POST** `/projects/{id}/insurance` – Select/purchase insurance. Body: `{ insurance_option_id }`. Creates a ProjectInsurance record and possibly calls external insurer API.

### Messaging & Files

- **GET** `/projects/{id}/messages` – List messages in project (paginated).
- **POST** `/projects/{id}/messages` – Send a message (sender is either client or pro). Body: `content` text and optional attachments.
- **POST** `/projects/{id}/messages/{msgId}/attachments` – Upload attachment to a message.

All communications (messages and attachments) are stored and auditable.

### Reviews & Ratings

- **GET** `/professionals/{id}/reviews` – List reviews of a professional (public).
- **POST** `/projects/{id}/reviews` – Submit review for a project (authenticated client leaves rating/comment for the pro). Body: `rating`, `comment`. This updates **Review** table and recalculates `rating_avg` in **ProfessionalProfile**.

### Incentives and Promotions

- **GET** `/users/{id}/promotions` – List active promotions/credits for user.
- **POST** `/users/{id}/promotions` – (Admin) Create a promotion (e.g. premium listing, discount code) for a user.

### Localization & Internationalization

- **All** endpoints accept an `Accept-Language` header; responses (like UI text) are localized on the client side.
- **Data** such as project descriptions or reviews are stored in original language (Unicode text). We store user's `language_pref` and country (not shown) so UI can default appropriately.
- We use ISO 3166 country codes and currency fields, and handle date/time in UTC with timezone metadata as needed. New languages/countries can be added by inserting translations (no schema changes).

### Pagination, Sorting, Filtering

List endpoints use query parameters, e.g. `?page=...&limit=...&sort=...&status=open`. This follows REST best practices. Complex filters (distance, skills) are handled via query parameters processed by backend with appropriate indexes (e.g. GIST index on location).

### Example Endpoints Summary

| Method | Path | Description |
| --- | --- | --- |
| POST | `/auth/register` | Register user |
| POST | `/auth/login` | Login and get token |
| GET | `/users/{id}` | Get user profile |
| PUT | `/users/{id}` | Update profile |
| GET | `/professionals` | Search professionals (filters: category, skills, location) |
| GET | `/professionals/{id}` | Get professional profile & ratings |
| PUT | `/professionals/{id}` | Update professional profile |
| POST | `/professionals/{id}/documents` | Upload verification doc |
| POST | `/projects` | Create project |
| GET | `/projects/{id}` | Get project details |
| PUT | `/projects/{id}` | Update project (status, assign pro) |
| GET | `/projects/{id}/quotes` | List quotes |
| POST | `/projects/{id}/quotes` | Submit quote |
| POST | `/projects/{id}/style-suggestions` | Upload images for AI design suggestions |
| POST | `/projects/{id}/contract` | Upload contract document |
| PUT | `/projects/{id}/contract/sign` | Sign contract |
| POST | `/projects/{id}/payments` | Make escrow payment (Stripe) |
| GET | `/projects/{id}/payments` | Check payment status |
| POST | `/projects/{id}/insurance` | Purchase insurance option |
| GET | `/projects/{id}/messages` | Get project messages |
| POST | `/projects/{id}/messages` | Send project message |
| POST | `/projects/{id}/messages/{msgId}/attachments` | Upload message attachment |
| GET | `/professionals/{id}/reviews` | List public reviews for professional |
| POST | `/projects/{id}/reviews` | Leave review for professional (by client) |
| GET | `/users/{id}/promotions` | Get user promotions/credits |
| POST | `/users/{id}/promotions` | Create promotion (admin only) |

## 5. Architecture & Implementation Notes

### Domain-Driven Design Approach

BuildApp will follow a domain-first approach with clearly defined bounded contexts:

1. **User Management**: Authentication, profiles, and permissions
2. **Professional Matching**: Search, discovery, and verification
3. **Project Management**: Creation, tracking, and coordination
4. **Payment & Escrow**: Financial transactions and security
5. **Messaging & Communication**: Real-time and asynchronous interaction
6. **AI & Suggestion**: Quote generation and style recommendation

### Application Architecture

Since BuildApp will use separate repositories for backend and frontend, here's the recommended structure for each:

### Backend Repository (buildapp-api)

```
buildapp-api/
├── app/
│   ├── api/
│   │   ├── v1/
│   │   │   ├── auth.py
│   │   │   ├── users.py
│   │   │   ├── professionals.py
│   │   │   ├── projects.py
│   │   │   ├── quotes.py
│   │   │   ├── contracts.py
│   │   │   ├── payments.py
│   │   │   ├── messages.py
│   │   │   ├── insurance.py
│   │   │   └── promotions.py
│   │   └── deps.py
│   ├── core/
│   │   ├── config.py
│   │   ├── security.py
│   │   └── exceptions.py
│   ├── db/
│   │   ├── base.py
│   │   └── session.py
│   ├── models/
│   │   ├── user.py
│   │   ├── professional_profile.py
│   │   ├── project.py
│   │   ├── quote.py
│   │   ├── contract.py
│   │   ├── payment.py
│   │   ├── style_suggestion.py
│   │   ├── insurance.py
│   │   ├── message.py
│   │   ├── review.py
│   │   └── promotion.py
│   ├── schemas/
│   │   ├── user.py
│   │   ├── project.py
│   │   ├── quote.py
│   │   └── ...
│   ├── services/
│   │   ├── ai_service.py
│   │   ├── payment_service.py
│   │   ├── insurance_service.py
│   │   └── notification_service.py
│   └── main.py
├── migrations/
├── tests/
│   ├── api/
│   ├── services/
│   └── conftest.py
├── alembic.ini
├── pyproject.toml
├── Dockerfile
├── docker-compose.yml
└── README.md

```

### Frontend Repository (buildapp-web)

```
buildapp-web/
├── public/
│   ├── favicon.ico
│   ├── index.html
│   └── assets/
├── src/
│   ├── assets/
│   │   ├── images/
│   │   ├── styles/
│   │   └── fonts/
│   ├── components/
│   │   ├── common/
│   │   │   ├── Button/
│   │   │   ├── Card/
│   │   │   ├── Input/
│   │   │   └── ...
│   │   ├── layout/
│   │   │   ├── Navbar/
│   │   │   ├── Sidebar/
│   │   │   ├── Footer/
│   │   │   └── ...
│   │   ├── user/
│   │   ├── professional/
│   │   ├── project/
│   │   └── admin/
│   ├── contexts/
│   │   ├── AuthContext.jsx
│   │   ├── ThemeContext.jsx
│   │   └── ...
│   ├── hooks/
│   │   ├── useAuth.js
│   │   ├── useProjects.js
│   │   └── ...
│   ├── pages/
│   │   ├── Auth/
│   │   │   ├── Login.jsx
│   │   │   ├── Register.jsx
│   │   │   └── ...
│   │   ├── Dashboard/
│   │   ├── Projects/
│   │   ├── Professionals/
│   │   └── Admin/
│   ├── services/
│   │   ├── api.js
│   │   ├── auth.js
│   │   ├── projects.js
│   │   └── ...
│   ├── utils/
│   │   ├── formatters.js
│   │   ├── validators.js
│   │   └── ...
│   ├── App.jsx
│   ├── routes.jsx
│   └── index.jsx
├── .eslintrc.js
├── .prettierrc
├── package.json
├── vite.config.js
├── Dockerfile
└── README.md

```

### Mobile Repository (buildapp-mobile) - Future Consideration

```
buildapp-mobile/
├── android/
├── ios/
├── src/
│   ├── assets/
│   ├── components/
│   ├── contexts/
│   ├── hooks/
│   ├── navigation/
│   ├── screens/
│   ├── services/
│   ├── utils/
│   └── App.jsx
├── package.json
└── README.md

```

### Backend Implementation Notes

1. **FastAPI Setup**:
    - Use dependency injection for services and repositories
    - Implement middleware for authentication, logging, and error handling
    - Set up Pydantic schemas for validation and serialization
2. **Database & ORM**:
    - Use SQLAlchemy Core for complex queries and async support
    - Implement migrations with Alembic
    - Set up PostGIS extensions for spatial queries
3. **Authentication**:
    - JWT implementation with refresh tokens
    - OAuth2 integration for social sign-in (Google, Facebook)
    - Role-based permission system
4. **API Development**:
    - Implement RESTful endpoints following best practices
    - Versioning from the start (v1)
    - Proper status codes and error responses
5. **AI Integration**:
    - Asynchronous processing of AI requests
    - Queue system for handling image uploads and processing
    - Caching AI responses for similar requests
6. **Payments & Escrow**:
    - Stripe Connect integration for holding funds
    - Webhook handling for payment events
    - Transaction logging and reporting

### Frontend Implementation Notes

1. **React Application**:
    - Set up routing with React Router
    - State management (React Context or Redux)
    - Form handling with React Hook Form
2. **UI Components**:
    - Implement UI library (shadcn/ui or Material UI)
    - Create reusable components for common patterns
    - Responsive design (mobile-first approach)
3. **API Communication**:
    - Set up Axios or Fetch for API requests
    - Implement authentication token management
    - Caching strategies for frequent requests
4. **User Experience**:
    - Loading states and error handling
    - Form validation with immediate feedback
    - Intuitive navigation and workflows
5. **Real-time Features**:
    - Integrate WebSockets for real-time chat
    - Notifications for project updates
    - Live status updates for payments and contracts

## 6. Deployment & DevOps Considerations

### Infrastructure

Based on the PRD's mention of Kubernetes and cloud deployment:

1. **Containerization**:
    - Docker for application containerization
    - Multi-stage builds for optimized images
2. **Orchestration**:
    - Kubernetes for container orchestration
    - Helm charts for deployment management
3. **Cloud Provider**:
    - AWS or even simpler like Vercel
    - Managed services for databases, storage, and caching
4. **CI/CD**:
    - GitHub Actions for automated testing and deployment
    - Environment-specific deployments (dev, staging, production)

### Monitoring & Logging

1. **Application Monitoring**:
    - Prometheus for metrics collection
    - Grafana for visualization
2. **Logging**:
    - Structured logging with ELK stack or Cloud provider solutions (NewRelic, DataDog)
    - Tracing for request flows (OpenTelemetry)
3. **Alerting**:
    - Set up alerts for critical errors and performance issues
    - On-call rotation for issue resolution

## 7. MVP Development Roadmap

### Phase 1: Foundation (Weeks 1-2)

1. **Project Setup**:
    - Set up backend and frontend repositories
    - Configure CI/CD pipelines
    - Initialize database schema
2. **Authentication**:
    - Implement user registration and login
    - Set up JWT authentication
    - Create basic user profiles
3. **Basic Data Models**:
    - Implement core models (User, ProfessionalProfile, Project)
    - Set up relationships and constraints
    - Create initial API endpoints

### Phase 2: Core Features (Weeks 3-4)

1. **Project Management**:
    - Implement project creation and management
    - Develop quote submission and management
    - Create professional search functionality
2. **AI Integration**:
    - Set up OpenAI API integration
    - Implement quote generation service
    - Develop style suggestion feature (from photos)
3. **Communication**:
    - Implement messaging system between clients and professionals
    - Set up file attachments and document storage
    - Develop notification system

### Phase 3: Financial & Security (Weeks 5-6)

1. **Payment System**:
    - Integrate Stripe for payment processing
    - Implement escrow functionality
    - Set up payment release workflows
2. **Contracts**:
    - Develop contract generation
    - Implement digital signature system
    - Create contract management interface
3. **Reviews & Ratings**:
    - Implement review submission
    - Develop rating calculation
    - Create professional reputation system

### Phase 4: Polish & Testing (Weeks 7-8)

1. **UI Refinement**:
    - Improve user interface and experience
    - Implement responsive design
    - Add animations and transitions
2. **Testing**:
    - Unit and integration tests
    - User acceptance testing
    - Performance and load testing
3. **Launch Preparation**:
    - Documentation completion
    - Final bug fixes
    - Deployment automation

## 8. Key Technical Challenges

### AI Integration Challenges

1. **Real-time Quote Generation**:
    - Solution: Use asynchronous processing with a queue system to handle high-volume quote requests
    - Implementation: Celery or Redis Queue for task management
2. **Style Suggestion Accuracy**:
    - Solution: Fine-tune models with domain-specific data
    - Implementation: OpenAI API with custom prompts and post-processing
3. **Photo Processing for Suggestions**:
    - Solution: Implement image preprocessing pipeline
    - Implementation: Use Google Vision AI or similar services for image analysis

### Payment & Escrow Challenges

1. **Secure Fund Management**:
    - Solution: Use Stripe Connect for holding funds
    - Implementation: Custom workflows for milestone-based releases
2. **Dispute Resolution**:
    - Solution: Implement clear rules and automated processes for common disputes
    - Implementation: Documented resolution steps and admin interfaces

### Performance & Scalability Challenges

1. **Location-based Search Performance**:
    - Solution: Implement efficient spatial indexing
    - Implementation: PostGIS extensions and optimized queries
2. **Real-time Messaging at Scale**:
    - Solution: Use WebSockets with horizontal scaling
    - Implementation: Redis pub/sub for message distribution
3. **Image Storage and Delivery**:
    - Solution: Use cloud storage with CDN
    - Implementation: AWS S3 or similar with CloudFront distribution

## 9. Cross-Service Communication & Integration

Given the multi-repository approach, careful consideration must be given to how services will communicate:

### API Contracts & Documentation

1. **OpenAPI/Swagger Integration**:
    - Implement automatic OpenAPI documentation in FastAPI backend
    - Generate TypeScript interfaces from OpenAPI schemas for frontend
    - Set up API versioning strategy from the beginning
2. **Type Sharing**:
    - Create shared type definitions for key entities
    - Consider a lightweight package for common types (e.g., DTOs)

### Service Coordination

1. **Authentication Flow**:
    - Implement consistent JWT handling across services
    - Set up secure token refresh mechanisms
    - Handle social authentication redirects properly
2. **Real-time Features**:
    - WebSocket connections for chat and notifications
    - Consider server-sent events for one-way updates
    - Fall back to polling where necessary for compatibility
3. **File Uploads & Processing**:
    - Direct-to-S3 uploads from frontend with signed URLs
    - Background processing of images for AI analysis
    - Progress indicators for long-running operations

## 10. Development Workflow & Practices

To ensure smooth development across multiple repositories:

### Code Quality & Standards

1. **Linting & Formatting**:
    - Backend: Black and isort for Python
    - Frontend: ESLint and Prettier for JavaScript/TypeScript
    - Pre-commit hooks to enforce standards
2. **Testing Practices**:
    - Backend: pytest for unit and integration tests
    - Frontend: Jest and React Testing Library
    - E2E testing with Cypress or Playwright
3. **Code Review Process**:
    - Pull request templates for each repository
    - Required reviewers for critical components
    - Automated checks before merge

### Documentation

1. **Code Documentation**:
    - Backend: Docstrings and type hints
    - Frontend: JSDoc annotations
    - Architecture decision records (ADRs) for major decisions
2. **User Documentation**:
    - API documentation with examples
    - Frontend component storybook
    - Developer onboarding guides

### Project Management

1. **Issue Tracking**:
    - Cross-reference issues between repositories
    - Label system for feature areas
    - Milestone planning for coordinated releases
2. **Feature Implementation Flow**:
    - Plan features across repositories
    - Implement API endpoints first, then frontend
    - Coordinate testing and deployment# BuildApp MVP Implementation Plan