Struct Router 

pub struct Router;

Router helper functions for common patterns

Implementations

impl Router

pub fn by_field(field: &str) -> impl Fn(&State) -> String + Send + Sync + Clone

Route based on a state field value

Example

.conditional_edge("supervisor", Router::by_field("next_agent"), targets)

pub fn has_tool_calls( messages_field: &str, if_true: &str, if_false: &str, ) -> impl Fn(&State) -> String + Send + Sync + Clone

Route based on whether the last message has tool calls

Example

.conditional_edge("agent", Router::has_tool_calls("messages", "tools", END), targets)

pub fn by_bool( field: &str, if_true: &str, if_false: &str, ) -> impl Fn(&State) -> String + Send + Sync + Clone

Route based on a boolean state field

Example

.conditional_edge("check", Router::by_bool("should_continue", "process", END), targets)

pub fn max_iterations( counter_field: &str, max: usize, continue_target: &str, done_target: &str, ) -> impl Fn(&State) -> String + Send + Sync + Clone

Route based on iteration count

Example

.conditional_edge("loop", Router::max_iterations("iteration", 5, "continue", "done"), targets)

pub fn on_error( error_field: &str, error_target: &str, success_target: &str, ) -> impl Fn(&State) -> String + Send + Sync + Clone

Route based on the presence of an error

Example

.conditional_edge("process", Router::on_error("error", "error_handler", "success"), targets)

pub fn custom<F>(f: F) -> impl Fn(&State) -> String + Send + Sync + Clone

where F: Fn(&State) -> String + Send + Sync + Clone + 'static,

Create a custom router from a closure

Example

.conditional_edge("agent", Router::custom(|state| {
    if state.get("done").and_then(|v| v.as_bool()).unwrap_or(false) {
        END.to_string()
    } else {
        "continue".to_string()
    }
}), targets)