* Finally managed to generate JSON output without embedding responses in ```json\n...\n``` for no reason.

* Managed to put error/info messages into a separate key instead of concatenating them with stringified JSON in the main body of the response.

* Taught Claude to treat numeric integer strings as integers to avoid embarrassment when the user asks it for a "two-digit random number between 1-50, like 11" and Claude replies with 111.