Hazle

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The project is under development and the code can be found in hazle-android and hazle-backend repos.

Project Architecture

Tech Stack

1. Android Client:

   • Jetpack Compose: Material 3 dynamic UI with dark/light theme
   • Koin: Dependency injection for clean architecture
   • Ktor: API handling from client-side
   • Coroutines: Background message processing
   • Room: Local caching for offline support

2. Ktor Backend (Middleware):

   • Auth API: JWT token handling
   • Chat API: Message queue management
   • OpenAI API: AI integration for message responses
   • Koin: Dependency injection

3. Supabase Services:

   • Auth: Email/password + social logins
   • Realtime DB: PostgreSQL for chat history (roadmap)
   • Storage: File attachments (roadmap)

MVP Features

Component	Functionality
Auth Flow	App → Ktor → Supabase Auth → JWT token → Session management
Chat Process	User message → Ktor → OpenAI → Ktor → Push notification
Notification	Tap opens chat thread with context-aware history
Offline	Local caching with message queue for retries

Phase Roadmap

1. MVP (Current): [Progress tracker]

   • Auth + basic chat
   • Notification system
   • Compose UI with themes
   • English, Sinhala and German languages
   • Marketing and pricing
     • a. Sri Lankan audience
       • Subscription pricing model with IdeaMart
       • Focused on translation more
     • b. International audience
       • Subscription pricing model with Google Play billing
       • Focused on summarizing articles

2. V2 (Quality of life features): [Progress tracker]

   • Supabase realtime chat sync
   • Prompt engineering dashboard
   • Message history
   • File attachment support
   • More localization

3. V3 (Cross-platform): [Progress tracker]

   • Shared KMP core module
   • iOS UI with Compose Multiplatform
   • Configurable AI personalities
   • Usage analytics

Learning Opportunities

Technology	Key Concepts Learned
Jetpack Compose	Material 3 Expressive theming, custom animations
Koin	Cleaner modular code with Dependency injection
Ktor	REST API development, middleware
Supabase	Firebase alternative, Authentication, PostgreSQL management
Localization	Multi-language support with Componse UI, German language