Practice Project: AI Chat Assistant

Build a complete chat assistant with memory and streaming

🔑 Key Concepts

Project goal — Build a command-line chat assistant that maintains conversation history, streams responses, and handles errors gracefully.
Requirements — Conversation memory (last 10 messages), streaming output, error handling, token counting, cost tracking.
Extensions — Add system prompt customisation, multiple model support, conversation export, RAG integration.
Success criteria — Runs for 50+ turns without errors, shows streaming output, tracks cost per conversation.

💡 Practice: Try implementing each concept yourself before moving on. Reading about RAG and building RAG are very different things.