Chatify – Offline-First Kotlin Multiplatform Chat Application Built with Compose & MVI

Chatify is a robust Kotlin Multiplatform application showcasing a modern local-first architecture, reactive synchronization engine, and polished UI animations.
It is built using Compose Multiplatform for shared UI across Android and iOS, SQLDelight for local persistence, and the MVI (Model-View-Intent) pattern for predictable and scalable state management.

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🎯 Key Features

⚡ Local-First Architecture

Chatify works fully offline by design. Every user action is persisted locally first, ensuring instant UI updates with zero latency, even without an internet connection.

🔄 Robust Sync Strategy

A powerful synchronization engine ensures data consistency between local and remote sources using state flags:

• pendingSync → Data waiting to be synced
• isFailed → Sync failed after retries
• pendingDelete → Soft-deleted items awaiting server confirmation

🧠 MVI Architecture

Implements a clean unidirectional data flow using shared ViewModels across Android and iOS for predictable state handling and easier debugging.

✨ Polished UI Animations

Features a premium Typewriter Effect for assistant responses with a custom warm-up phase (1.2s) that prevents historical messages from re-animating.

🏷️ Automatic Session Naming

Intelligently generates chat titles based on the first user message in a conversation.

🔁 Reactive UI Updates