A deliberately tiny version of the Phi-3 architecture published by HuggingFace's TRL (Transformer Reinforcement Learning) team for automated testing and CI pipelines. With a 4096-token context window and minimal parameter count, it is designed to validate training and inference code paths quickly rather than produce useful outputs. Not intended for production use — think of it as a development fixture that ensures the Phi-3 model class works correctly in the TRL library.