Chat

Use when building a stateful chat session that wraps an Agent and persists the conversation via a `MessageStoreInterface`. Also trigger when the user asks "how do I keep conversation history between requests", "how to store chat messages in Doctrine or Redis", or "how to stream a chat reply and still save it". Triggers on `Chat`, `ChatInterface`, `MessageStoreInterface`, `Chat\ManagedStoreInterface`, `Chat\InMemory\Store`, `MessageNormalizer`, message-store `setup()` / `drop()` console commands. Do NOT trigger for raw LLM invocation (use `platform`), a stateless tool-calling agent (use `agent`), or vector storage (use `store`).