Sunpeak AI App Framework and Testing

Sunpeak (current version 0.20.7) is an AI application framework, testing framework, and inspector specifically designed for building and debugging Multi-Platform (MCP) Apps, such as those for ChatGPT and Claude. It provides a convention-over-configuration approach to simplify wiring MCP servers, handling protocol messages, managing resource HTML bundles, and setting up dev environments with hot module replacement (HMR). Its key differentiators include a robust testing framework that simulates host runtimes and provides simulation fixtures for reproducible testing across various hosts, themes, and data states without relying on external accounts or API credits. It also offers a visual inspector for debugging. Sunpeak releases are frequent, primarily focusing on bug fixes, performance improvements, and feature enhancements within the 0.x.x minor version range, indicating active development.