Prompt agents
The easy-to-start type. You describe in plain language what the agent should do, and at its core that is the whole design. Then you enrich it: add knowledge sources so it draws on your own documentation, connect tools so it can carry out actions, set triggers, and define guidelines that determine what it may and may not do.
A typical example is an agent that answers frequently asked questions from your knowledge library, deployed in the web chat. Something like that is up and running in an afternoon.
Agents come with version control and can be deployed to different environments, so you can test before anything reaches customers. Once published, you follow their behaviour with an analytics suite and adjust through policies.