Smalltalk offers several excellent features for LLM agents:

- Very small methods that function as standalone compilation units, enabling extremely fast compilation.

- Built-in, fast, and effective code browsing capabilities (e.g., listing senders, implementors, and instance variable users...). This makes it easy for the agent to extract only the required context from the system.

- Powerful runtime reflectivity and easily accessible debugging capabilities.

- A simple grammar with a more natural, language-like feel compared to Lisp.

- Natural sandboxing