Struct TapTextAgent 

pub struct TapTextAgent { /* private fields */ }

Read-only observation agent. Calls a function with the state but cannot mutate it. Returns empty string. No LLM call.

There is no with_middleware_chain here: a tap runs no inner agent and has no lifecycle of its own to observe — it is the observer. Attach middleware to the pipeline that contains it instead.

Implementations

impl TapTextAgent

pub fn new( name: impl Into<String>, f: impl Fn(&State) + Send + Sync + 'static, ) -> Self

Create a new tap agent for read-only observation.

Trait Implementations

impl TextAgent for TapTextAgent

fn name(&self) -> &str

Human-readable name for logging and debugging.

fn run<'life0, 'life1, 'async_trait>( &'life0 self, state: &'life1 State, ) -> Pin<Box<dyn Future<Output = Result<String, AgentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Execute this agent. Reads/writes state. Returns the final text output.

fn run_with<'life0, 'life1, 'async_trait>( &'life0 self, request: RunRequest, state: &'life1 State, ) -> Pin<Box<dyn Future<Output = Result<RunResult, AgentError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Run one request and report everything it produced: the reply, the turns to append to a conversation, token usage and tool calls.

fn run_stream<'a>( &'a self, request: RunRequest, state: State, ) -> BoxStream<'a, Result<RunEvent, AgentError>>

Run one request as a stream of RunEvents: text as the model writes it, each tool call and result, then RunEvent::Finished.

fn stream( &self, prompt: impl Into<String>, ) -> BoxStream<'_, Result<RunEvent, AgentError>>

where Self: Sized,

Stream the reply to one question, with no history and fresh state.

fn ask<'life0, 'async_trait>( &'life0 self, prompt: impl 'async_trait + Into<String> + Send, ) -> Pin<Box<dyn Future<Output = Result<String, AgentError>> + Send + 'async_trait>>

where Self: Sized + 'async_trait, 'life0: 'async_trait,

Ask one question, with no history and fresh state, and get the reply.

fn ask_as<'life0, 'async_trait, T>( &'life0 self, prompt: impl 'async_trait + Into<String> + Send, ) -> Pin<Box<dyn Future<Output = Result<T, AgentError>> + Send + 'async_trait>>

where Self: Sized + 'async_trait, T: DeserializeOwned + JsonSchema + Send + 'async_trait, 'life0: 'async_trait,

Ask one question and get the reply as a T.

fn chat(&self) -> Chat<&Self>

where Self: Sized,

Start a conversation that remembers its turns. See Chat.