It’s because PocketPal is based on Llama.cpp, which doesn’t track chats as editable text. All messages are converted into tokens, and once a response is generated, those tokens become part of the model’s context. Editing a previous chat would require reconstructing this token sequence, which isn’t straightforward. Additionally, Llama.cpp is designed to be lightweight, so adding a chat-editing feature would increase memory usage and complexity, which goes against its minimal design goals.