Project Myriad - Technical Requirements Specification

This document outlines the detailed technical requirements and constraints for Project Myriad, “The Definitive Manga and Anime Platform”.

System Requirements

Minimum System Requirements

Android Device:

  • API Level: 24 (Android 7.0 Nougat)
  • RAM: 3GB minimum, 4GB+ recommended
  • Storage: 2GB available space (minimum), 32GB+ recommended
  • Architecture: ARM64 (arm64-v8a), ARMv7 (armeabi-v7a)

Development Environment:

  • JDK: OpenJDK 17 (Eclipse Temurin recommended)
  • Android SDK: API 24-36 (compileSdk: 36, targetSdk: 35)
  • Gradle: 9.1.0+ (via wrapper)
  • Kotlin: 2.2.20+
  • Android Studio: Koala (2024.1.1) or newer

Android Device:

  • API Level: 28+ (Android 9.0+) for optimal experience
  • RAM: 6GB+ for smooth performance
  • Storage: 64GB+ with SD card support
  • GPU: Adreno 530+, Mali-G71+, or PowerVR GT7600+

Development Environment:

  • RAM: 16GB+ for development
  • Storage: SSD with 50GB+ available space
  • CPU: 8-core processor or equivalent

Technology Stack Requirements

📖 For technology stack overview, see ARCHITECTURE.md - Technology Stack

This section provides detailed version requirements and technical constraints for each technology component:

Core Technologies

Programming Language:

  • Kotlin: 2.2.20 (language level 1.9)
  • Kotlin Multiplatform: Future consideration
  • Java Compatibility: Target 1.8 for maximum compatibility

Android Framework:

  • Android Gradle Plugin: 8.13.0
  • Compile SDK: 36 (Android 15)
  • Target SDK: 35 (Android 14)
  • Min SDK: 24 (Android 7.0) - 85%+ device coverage

UI Framework:

  • Jetpack Compose: BOM 2024.02.00
  • Compose Compiler: 2.2.20
  • Material Design: 3 (Material You)
  • Compose Navigation: Type-safe navigation

Architecture Components

Core Architecture:

  • Clean Architecture: Domain/Data/Presentation layers
  • MVVM Pattern: ViewModel + StateFlow
  • Dependency Injection: Manual DI (Hilt when KAPT/KSP ready)
  • Reactive Programming: Kotlin Coroutines + Flow

Data Layer:

  • Local Database: Room 2.6.1
  • Networking: Retrofit 2.9.0 + OkHttp 4.12.0
  • Serialization: Kotlin Serialization 1.6.0
  • File System: Android Storage Access Framework

Security:

  • Encryption: AES-256 for sensitive data
  • Network Security: Certificate pinning, HTTPS only
  • Permission Model: Runtime permissions, minimal access
  • Code Obfuscation: R8/ProGuard for release builds

Functional Requirements

Core Features Overview

Project Myriad implements three primary feature pillars as described in the project README. This section provides detailed technical specifications for each:

📖 For feature overviews and user-facing descriptions, see README.md - Features

Technical Feature Specifications

The Vault - Local Media Management:

  • Supported Formats:
    • Manga: .cbz, .cbr (ComicRack compatibility)
    • Anime: .mp4, .mkv, .avi (legacy support)
  • Import Methods: File picker, drag-drop, batch import
  • Organization: Collections, tags, custom categories
  • Metadata: Automatic extraction, manual editing
  • Search: Full-text search, metadata filtering
  • Offline Access: Complete functionality without internet

AI Core - Intelligent Features:

  • OCR Translation: Real-time manga page translation
  • Art Style Analysis: Visual categorization and matching
  • Content Recognition: Scene detection, character identification
  • Recommendations: AI-driven content suggestions
  • Language Support: Multi-language OCR and translation

The Browser - Online Discovery:

  • Source Architecture: Plugin-based extensible system
  • Global Search: Cross-source content discovery
  • Download Manager: Queue management, pause/resume
  • Sync System: Cloud backup for settings and progress
  • Rate Limiting: Respectful source interaction

Enhanced Reading Experience:

  • Reading Modes: Single page, double page, continuous scroll, webtoon
  • Gesture Controls: Tap zones, swipe navigation, zoom
  • Customization: Themes, typography, layout preferences
  • Progress Tracking: Reading statistics, completion status
  • Accessibility: Screen reader support, high contrast modes

Non-Functional Requirements

Performance:

  • App Launch Time: <3 seconds cold start
  • Page Loading: <500ms for local content
  • Memory Usage: <200MB baseline, <500MB peak
  • Battery Impact: Minimal background processing
  • Smooth Scrolling: 60fps UI rendering

Reliability:

  • Crash Rate: <0.1% session crash rate
  • Data Integrity: No data loss during normal operation
  • Error Recovery: Graceful handling of network/storage errors
  • Backup System: Automatic backup of user data

Security:

  • Data Privacy: No unauthorized data collection
  • Network Security: HTTPS only, certificate validation
  • Local Security: Encrypted sensitive data storage
  • Permission Usage: Minimal required permissions only

Usability:

  • Learning Curve: Intuitive for first-time users
  • Accessibility: WCAG 2.1 AA compliance
  • Internationalization: Multi-language support
  • Responsive Design: Adaptive UI for various screen sizes

Development Requirements

Code Quality Standards

Code Style:

  • Kotlin: Official Kotlin style guide
  • Formatting: ktlint with project-specific rules
  • Documentation: KDoc for public APIs
  • Naming: Descriptive, consistent naming conventions

Testing Requirements:

  • Unit Tests: 70%+ code coverage target
  • Integration Tests: Critical user flows covered
  • UI Tests: Compose UI testing for key screens
  • Performance Tests: Memory and CPU benchmarks

Static Analysis:

  • Detekt: Kotlin static analysis with custom rules
  • Android Lint: Android-specific issue detection
  • Security Scanning: OWASP dependency checks
  • License Compliance: Automated license verification

Build and Deployment

Build System:

  • Gradle: Version catalogs for dependency management
  • Build Variants: Debug, release, staging
  • Optimization: R8 code shrinking and obfuscation
  • Signing: Keystore-based release signing

CI/CD Pipeline:

  • Automated Testing: Unit and integration test execution
  • Quality Gates: Code quality checks before merge
  • Release Automation: Automated APK generation
  • Documentation: Automatic API documentation generation

Environment Configuration:

  • Development: Debug builds with logging
  • Staging: Release-like builds for testing
  • Production: Optimized builds with monitoring

External Dependencies

Required APIs

Android System APIs:

  • Storage Access Framework: File system access
  • MediaStore: Media file metadata
  • ExoPlayer: Video playback support
  • WorkManager: Background task processing

Optional Dependencies

Firebase (Optional):

  • Analytics: Usage analytics (user consent required)
  • Crashlytics: Crash reporting and analysis
  • Cloud Storage: Settings and progress sync
  • Authentication: User account management

Third-Party Libraries:

  • Image Loading: Coil for efficient image handling
  • PDF Rendering: PDF support for certain manga formats
  • Networking: HTTP client for online sources
  • Compression: Archive extraction for .cbz/.cbr files

Platform Constraints

Android Limitations

Storage Access:

  • Scoped Storage: Android 10+ storage restrictions
  • External Storage: Limited write access
  • Media Collections: MediaStore API requirements
  • File Picker: Storage Access Framework dependencies

Background Processing:

  • Doze Mode: Battery optimization impacts
  • Background Limits: Android 8+ background execution limits
  • Foreground Services: Required for long-running tasks
  • Work Scheduling: WorkManager for deferred tasks

Network Access:

  • Network Security Config: HTTPS enforcement
  • Clear Text Traffic: Restricted in production
  • VPN Compatibility: Proxy and VPN support
  • Offline Capability: Core features work without network

Hardware Constraints

Memory Management:

  • Large Images: Efficient bitmap loading and caching
  • Video Playback: Hardware-accelerated decoding
  • Background Apps: Memory pressure handling
  • Garbage Collection: Minimal allocation in critical paths

Storage Limitations:

  • Internal Storage: Limited space on some devices
  • SD Card Support: External storage integration
  • File System: FAT32 limitations for large files
  • Cache Management: Intelligent cache cleanup

Security Requirements

Data Protection

User Data:

  • Reading Progress: Encrypted local storage
  • Library Metadata: Local database with backup
  • Settings: Secure preferences storage
  • API Keys: Secure credential management

Network Security:

  • TLS 1.3: Modern encryption protocols
  • Certificate Pinning: Man-in-the-middle protection
  • Request Validation: Input sanitization
  • Rate Limiting: API abuse prevention

Privacy Compliance

Data Collection:

  • Minimal Data: Only necessary data collection
  • User Consent: Explicit permission for optional features
  • Data Retention: Automatic cleanup of unnecessary data
  • Export Options: User data portability

Third-Party Integration:

  • API Security: Secure integration with external services
  • Permission Scoping: Minimal required permissions
  • Audit Trail: Logging of security-relevant events
  • Vulnerability Management: Regular security updates

Compatibility Requirements

Device Compatibility

Screen Sizes:

  • Phones: 5” to 7” displays
  • Tablets: 7” to 13” displays
  • Foldables: Adaptive UI for folding screens
  • Orientation: Portrait and landscape support

Android Versions:

  • Minimum: Android 7.0 (API 24)
  • Target: Android 14 (API 35)
  • Compile: Android 15 (API 36)
  • Testing: Android 8.0+ primary focus

Hardware Features:

  • CPU Architecture: ARM64, ARMv7
  • GPU Acceleration: Hardware-accelerated graphics
  • Storage: Internal and external storage support
  • Network: WiFi and mobile data support

Format Compatibility

Manga Formats:

  • Archive Formats: .cbz (ZIP), .cbr (RAR)
  • Image Formats: JPEG, PNG, WebP
  • Metadata: ComicInfo.xml, ComicRack compatibility
  • Compression: Standard ZIP/RAR compression

Anime Formats:

  • Video Containers: .mp4, .mkv, .avi
  • Video Codecs: H.264, H.265, VP9
  • Audio Codecs: AAC, MP3, AC3
  • Subtitles: SRT, ASS, VTT formats

Future Requirements

Roadmap Considerations

Phase 2 Features:

  • Cross-platform: Desktop and web versions
  • Advanced AI: Enhanced translation and analysis
  • Social Features: Community sharing and reviews
  • Cloud Sync: Full library synchronization

Technology Evolution:

  • Kotlin Multiplatform: Shared code across platforms
  • Compose Multiplatform: UI consistency
  • Modern Android: Latest Android features adoption
  • Performance: Hardware acceleration improvements

Scalability Requirements

User Base Growth:

  • Performance: Efficient algorithms for large libraries
  • Storage: Scalable local storage management
  • Network: Graceful degradation under load
  • Maintenance: Automated update and migration systems

This requirements specification is a living document, updated as the project evolves and new requirements are identified.

Last updated: December 2024 - Version 1.0.1