Koshino

Koshino Documentation

Koshino is an interactive operator console featuring a real-time animated Live2D interface, intelligent chat capabilities, and a comprehensive suite of productivity tools. This documentation provides technical details about the system architecture, rendering pipeline, and integration options.

Live2D Visualization

High-fidelity character rendering with real-time cursor tracking

Chat Interface

Premium conversational UI with session persistence

Privacy-First

All sensitive data remains in your browser

System Architecture

The system is built on a layered architecture separating concerns between rendering, state management, and data persistence. All layers communicate through well-defined interfaces.

Client Layer

Live2D • PixiJS • React

Processing Layer

Cursor Tracking • Lerp • RAF

Storage Layer

localStorage • IndexedDB

Frontend Stack

  • Next.js 15 (App Router)
  • TypeScript 5.x
  • Tailwind CSS
  • Framer Motion

Rendering Stack

  • PixiJS 8.x
  • pixi-live2d-display
  • Cubism SDK 5.x
  • WebGL 2.0

Model Pipeline

The Live2D rendering pipeline processes cursor input through multiple stages to achieve smooth, natural-looking character animation. The system operates at 60 FPS using requestAnimationFrame.

Render Loop Sequence

1
Input Capture— Pointer position captured relative to stage container
2
Normalization— Coordinates mapped to -1.0 to 1.0 range with clamping
3
Easing— Power curve applied for natural edge behavior
4
Interpolation— Linear interpolation (lerp) smooths transitions
5
Parameter Mapping— Values applied to eye, head, and body parameters
6
Frame Render— PixiJS renders updated model state to WebGL context

Note: Model assets should be placed in /public/live2d/koshino/. The system expects a valid .model3.json file as the entry point.

Chat Interface

The chat system provides a premium conversational experience with message persistence, typing indicators, and session management. Messages are stored in localStorage for continuity.

Features

  • Real-time message rendering
  • Animated typing indicator
  • Session persistence
  • Expandable drawer UI

API Integration

The chat backend is currently stubbed with placeholder responses.

Full integration available in future releases.

App Shell Tools

The App Shell provides access to 10 specialized tools, each with dedicated UI and controls. Tools are designed for extensibility and will connect to backend services in future releases.

Manga Studio
Website Builder
Web Scanner
Discord Bot
Knowledge Base
Asset Forge
Prompt Library
Workflows
Settings
Diagnostics

Security & Privacy

Koshino is designed with privacy as a core principle. All sensitive data remains on your device until you explicitly choose to connect external services.

API Key stored locally
Messages in session state
Tracking data in memory only

Data Handling Principles

  • • API keys stored exclusively in browser localStorage
  • • No telemetry or analytics collection
  • • No server-side session storage
  • • Keys are never logged to console or transmitted
  • • Clear data anytime via Settings → Reset All

Roadmap

Koshino is under active development. The following roadmap outlines planned features and improvements.

v0.1

Foundation

  • Live2D integration
  • Cursor tracking
  • Basic chat UI
  • Settings page
  • Documentation
v0.2

App Shell

In Progress
  • Tool launcher
  • 10 core tools (UI)
  • Dense console layout
  • Chat drawer
  • Premium polish
v0.3

Intelligence

  • Backend API integration
  • Real chat responses
  • Streaming support
  • Context management
v1.0

Production

  • Manga panel generation
  • Discord bot deployment
  • Workflow automation
  • Knowledge indexing

Frequently Asked Questions