# Class LittleGhost::AgentBuilder

Documentation version: Edge

Canonical HTML: https://littleghostai.org/docs/LittleGhost/AgentBuilder.html

Builds an Agent definition from declarations made at runtime.

    agent = LittleGhost::AgentBuilder.new(id: "customer_support")
    agent.model "openrouter:openai/gpt-5.6-luna"
    agent.system_prompt "Answer customer questions clearly."
    agent.ask("Where is my order?")

It accepts the same configuration calls as an Agent class. Changing the
builder affects future builds without changing Agents already built.

## Inheritance

`LittleGhost::AgentBuilder < LittleGhost::AssemblyBuilder`