1. Overview

The LLM API Connector is a comprehensive framework for Unity applications to interact with various large language model APIs, including Anthropic's Claude, Google's Gemini, and OpenAI's GPT models. This framework provides a unified interface for sending requests, managing conversations, and processing responses, while abstracting away the differences between the underlying API implementations.

2. Core Architecture

The system is built around a polymorphic singleton pattern that allows for multiple model-specific implementations to share a common interface while maintaining independent instances. The architecture consists of:

  1. Core Framework - Base abstract classes that define the framework structure
  2. Model Implementations - Concrete implementations for specific LLM providers
  3. Client - High-level interface for application code
  4. Data Types - Common data structures used throughout the system
  5. Constants & Utilities - Helper classes and configuration constants

3. Class Reference

1) Core Framework

1 - PolymorphicSingleton

Inheritance: MonoBehaviour

A base class that enables polymorphic singleton pattern, allowing derived classes to maintain their own singleton instances while preserving type hierarchies.

Properties:

Name Type Description
none

Methods:

Name Return Type Description
GetInstance<TU>() TU Protected static method to retrieve or create the singleton instance of type TU.
Awake() void Virtual method called when the script instance is being loaded. Ensures proper singleton instance management.
OnDestroy() void Virtual method called when the MonoBehaviour will be destroyed. Cleans up the singleton instance.
OnApplicationQuit() void Virtual method called when the application is quitting. Sets the shutdown flag.

2 - AbstractAIInterface