Struct AgentDefinition 

pub struct AgentDefinition {
    pub name: String,
    pub instructions: String,
    pub model: ModelSpec,
    pub capabilities: Vec<Arc<dyn Capability>>,
    pub max_iterations: usize,
    pub middleware: Vec<Arc<dyn TurnMiddleware>>,
    pub hooks: Vec<Arc<dyn Hook>>,
    pub budget_checker: Option<Arc<dyn BudgetChecker>>,
    pub context_assembler: Arc<dyn ContextAssembler>,
    pub model_profile: Option<ModelProfile>,
    pub context_token_limit: Option<usize>,
}

Agent behavior, separate from the resources that run it.

The model may contain credentials, so this value is sensitive configuration even though durable events never include it.

Fields

name: String

Human-readable diagnostic name.

instructions: String

Base system instructions.

model: ModelSpec

Default model, required for every built definition.

capabilities: Vec<Arc<dyn Capability>>

Behavior attached by value.

max_iterations: usize

Maximum reason steps in one turn.

middleware: Vec<Arc<dyn TurnMiddleware>>

Ordered turn policy.

hooks: Vec<Arc<dyn Hook>>

Ordered user hooks at session, turn, and tool lifecycle points.

budget_checker: Option<Arc<dyn BudgetChecker>>

Optional budget policy.

context_assembler: Arc<dyn ContextAssembler>

Shapes durable history into model context.

model_profile: Option<ModelProfile>

What this agent’s model supports, when the host said — see AgentBuilder::model_catalog. Read it to size a context budget or to show a user what the model can do; the builder has already used it to validate the composition.

context_token_limit: Option<usize>

Optional input-token ceiling exposed to context assembly.

Trait Implementations

impl Clone for AgentDefinition

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for AgentDefinition

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.