fix: restore LLM span recordings and replace unwrap panics with proper errors

- Restore llm.model, llm.tools, llm.user_message_preview, llm.temperature
  span field recordings that were lost during refactor
- Replace agents.as_ref().unwrap() and agent_map.get().unwrap() in
  orchestrator with proper error returns
- Replace from_endpoint().unwrap() with ok_or_else returning 400
- Replace to_bytes().unwrap() with match returning 500

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

crates/brightstaff/src/handlers/agents/orchestrator.rs

@@ -202,7 +202,9 @@ async fn handle_agent_chat_inner(
     // Create agent map for pipeline processing and agent selection
     let agent_map = {
         let agents = agents_list.read().await;
-        let agents = agents.as_ref().unwrap();
+        let agents = agents.as_ref().ok_or_else(|| {
+            AgentFilterChainError::RequestParsing(serde_json::Error::custom("No agents configured"))
+        })?;
         agent_selector.create_agent_map(agents)
     };
 
@@ -269,7 +271,12 @@ async fn handle_agent_chat_inner(
             .await?;
 
         // Get agent details and invoke
-        let agent = agent_map.get(&agent_name).unwrap();
+        let agent = agent_map.get(&agent_name).ok_or_else(|| {
+            AgentFilterChainError::RequestParsing(serde_json::Error::custom(format!(
+                "Selected agent '{}' not found in configuration",
+                agent_name
+            )))
+        })?;
 
         debug!(agent = %agent_name, "invoking agent");
 

crates/brightstaff/src/handlers/llm/mod.rs

@@ -21,13 +21,15 @@ use tracing::{debug, info, info_span, warn, Instrument};
 mod router;
 
 use crate::handlers::request::extract_request_id;
-use crate::handlers::utils::{create_streaming_response, ObservableStreamProcessor};
+use crate::handlers::utils::{
+    create_streaming_response, truncate_message, ObservableStreamProcessor,
+};
 use crate::router::llm::RouterService;
 use crate::state::response_state_processor::ResponsesStateProcessor;
 use crate::state::{
     extract_input_items, retrieve_and_combine_input, StateStorage, StateStorageError,
 };
-use crate::tracing::{operation_component, set_service_name};
+use crate::tracing::{llm as tracing_llm, operation_component, set_service_name};
 use router::router_chat_get_upstream_model;
 
 fn full<T: Into<Bytes>>(chunk: T) -> BoxBody<Bytes, hyper::Error> {
@@ -55,6 +57,10 @@ pub async fn llm_chat(
         request_id = %request_id,
         http.method = %request.method(),
         http.path = %request_path,
+        llm.model = tracing::field::Empty,
+        llm.tools = tracing::field::Empty,
+        llm.user_message_preview = tracing::field::Empty,
+        llm.temperature = tracing::field::Empty,
     );
 
     // Execute the rest of the handler inside the span
@@ -107,8 +113,28 @@ async fn llm_chat_inner(
         is_streaming_request,
         is_responses_api_client,
         messages_for_signals,
+        temperature,
+        tool_names,
+        user_message_preview,
     } = parsed;
 
+    // Record LLM-specific span attributes
+    let span = tracing::Span::current();
+    if let Some(temp) = temperature {
+        span.record(tracing_llm::TEMPERATURE, tracing::field::display(temp));
+    }
+    if let Some(tools) = &tool_names {
+        let formatted_tools = tools
+            .iter()
+            .map(|name| format!("{}(...)", name))
+            .collect::<Vec<_>>()
+            .join("\n");
+        span.record(tracing_llm::TOOLS, formatted_tools.as_str());
+    }
+    if let Some(preview) = &user_message_preview {
+        span.record(tracing_llm::USER_MESSAGE_PREVIEW, preview.as_str());
+    }
+
     // --- Phase 2: Resolve conversation state (v1/responses API) ---
     let state_ctx = match resolve_conversation_state(
         &mut client_request,
@@ -126,9 +152,16 @@ async fn llm_chat_inner(
     };
 
     // Serialize request for upstream BEFORE router consumes it
-    let client_request_bytes_for_upstream: Bytes = ProviderRequestType::to_bytes(&client_request)
+    let client_request_bytes_for_upstream: Bytes =
-        .unwrap()
+        match ProviderRequestType::to_bytes(&client_request) {
-        .into();
+            Ok(bytes) => bytes.into(),
+            Err(err) => {
+                warn!(error = %err, "failed to serialize request for upstream");
+                let mut r = Response::new(full(format!("Failed to serialize request: {}", err)));
+                *r.status_mut() = StatusCode::INTERNAL_SERVER_ERROR;
+                return Ok(r);
+            }
+        };
 
     // --- Phase 3: Route the request ---
     let routing_span = info_span!(
@@ -170,6 +203,7 @@ async fn llm_chat_inner(
     } else {
         alias_resolved_model.clone()
     };
+    tracing::Span::current().record(tracing_llm::MODEL_NAME, resolved_model.as_str());
 
     // --- Phase 4: Forward to upstream and stream back ---
     send_upstream(
@@ -203,6 +237,9 @@ struct PreparedRequest {
     is_streaming_request: bool,
     is_responses_api_client: bool,
     messages_for_signals: Option<Vec<Message>>,
+    temperature: Option<f32>,
+    tool_names: Option<Vec<String>>,
+    user_message_preview: Option<String>,
 }
 
 /// Parse the body, resolve the model alias, and validate the model exists.
@@ -229,10 +266,14 @@ async fn parse_and_validate_request(
         "request body received"
     );
 
-    let mut client_request = ProviderRequestType::try_from((
+    let api_type = SupportedAPIsFromClient::from_endpoint(request_path).ok_or_else(|| {
-        &chat_request_bytes[..],
+        warn!(path = %request_path, "unsupported endpoint");
-        &SupportedAPIsFromClient::from_endpoint(request_path).unwrap(),
+        let mut r = Response::new(full(format!("Unsupported endpoint: {}", request_path)));
-    ))
+        *r.status_mut() = StatusCode::BAD_REQUEST;
+        r
+    })?;
+
+    let mut client_request = ProviderRequestType::try_from((&chat_request_bytes[..], &api_type))
         .map_err(|err| {
             warn!(error = %err, "failed to parse request as ProviderRequestType");
             let mut r = Response::new(full(format!("Failed to parse request: {}", err)));
@@ -247,6 +288,7 @@ async fn parse_and_validate_request(
     );
 
     let model_from_request = client_request.model().to_string();
+    let temperature = client_request.get_temperature();
     let is_streaming_request = client_request.is_streaming();
     let alias_resolved_model = resolve_model_alias(&model_from_request, model_aliases);
 
@@ -273,7 +315,11 @@ async fn parse_and_validate_request(
         .map(|(_, model)| model.to_string())
         .unwrap_or_else(|| alias_resolved_model.clone());
 
-    // Extract messages for signal analysis before mutating client_request
+    // Extract span attributes and messages before mutating client_request
+    let tool_names = client_request.get_tool_names();
+    let user_message_preview = client_request
+        .get_recent_user_message()
+        .map(|msg| truncate_message(&msg, 50));
     let messages_for_signals = Some(client_request.get_messages());
 
     // Set the upstream model name and strip routing metadata
@@ -290,6 +336,9 @@ async fn parse_and_validate_request(
         is_streaming_request,
         is_responses_api_client,
         messages_for_signals,
+        temperature,
+        tool_names,
+        user_message_preview,
     })
 }