Struct RunSpan 

pub struct RunSpan {}

A run’s span recorder. Begin it once (mints the invoke_agent span id under the run trace), record a chat/execute_tool child as each completes, then finish to flush the whole trace. Every method is a no-op without the otel feature (or without OTEL_EXPORTER_OTLP_ENDPOINT), so the loop wires it unconditionally with no cfg at the call sites.

Implementations

impl RunSpan

pub fn record_chat( &mut self, model: &str, input_tokens: u64, output_tokens: u64, ok: bool, start_unix_nanos: u128, )

Record a chat child span for one model call (parent = the run span).

pub fn record_tool(&mut self, tool_name: &str, ok: bool, start_unix_nanos: u128)

Record an execute_tool child span for one tool call (parent = the run span).

pub fn finish( self, model: &str, input_tokens: u64, output_tokens: u64, ok: bool, )

Close the invoke_agent span and export the run trace (run span + every recorded child) as one OTLP batch. No-op without the feature/endpoint.