Yaseyo (痩せよ)

A personal diet app built with Kotlin Multiplatform. Native Android UI with Compose, native iOS UI with SwiftUI, shared business logic.

Testing

---

Tech Stack

Layer	Technology
Language	Kotlin 2.3.20
Multiplatform	Kotlin Multiplatform + Compose Multiplatform 1.10.3
Android UI	Jetpack Compose
iOS UI	SwiftUI
Auth	Firebase Auth via gitlive 2.4.0
Networking	Ktor 3.4.2
DI	Koin 4.2.1
iOS interop	SKIE 0.10.11
Formatting	Spotless + ktlint
Git hooks	Lefthook

---

Architecture

Multi-module KMP project. No single shared module — functionality is split across typed modules:

:composeApp          → Android app entry point
:iosApp              → iOS app entry point (Xcode project)

:libs:auth           → Aggregator (api + impl)
:libs:auth:api       → AuthRepository interface, AuthState
:libs:auth:impl      → Firebase Auth implementation
:libs:network        → Ktor HttpClient, auth token injection
:libs:coroutines     → CoroutineDispatchers, shared CoroutineScope
:libs:di             → Koin composition root

Module conventions:

• :libs modules always have :api (public contract) and :impl (implementation) — consumers depend on the aggregator
• Future :feature modules will follow a :ui / :data / :domain split — UI lives in the native codebases
• Convention plugins in :build-logic handle shared Gradle config (yaseyo.kmp.library)

---

Setup

Prerequisites

• JDK 17
• Android Studio (latest stable)
• Xcode 15+
• Homebrew

1. Clone and run setup

git clone <repo-url>
cd yaseyo-mobile
./scripts/setup.sh

Or via Gradle if you prefer:

./gradlew setup

This installs Lefthook (if needed) and registers the git hooks for auto-formatting on commit.

2. Firebase config

These files are gitignored — get them from Firebase console or a teammate:

• Android: place google-services.json in composeApp/
• iOS: place GoogleService-Info.plist in iosApp/iosApp/

3. iOS — Firebase SDK

Open iosApp/iosApp.xcodeproj in Xcode and add the Firebase iOS SDK via SPM:

1. File → Add Package Dependencies
2. URL: https://github.com/firebase/firebase-ios-sdk
3. Add FirebaseAuth and FirebaseCore to the iosApp target

---

Running

Android

./gradlew :composeApp:assembleDebug

iOS

Open iosApp/iosApp.xcodeproj in Xcode and run.