add overrides.disable_signals to skip CPU-heavy signal analysis (#906)

crates/brightstaff/src/app_state.rs

@@ -24,4 +24,7 @@ pub struct AppState {
     /// Shared HTTP client for upstream LLM requests (connection pooling / keep-alive).
     pub http_client: reqwest::Client,
     pub filter_pipeline: Arc<FilterPipeline>,
+    /// When false, agentic signal analysis is skipped on LLM responses to save CPU.
+    /// Controlled by `overrides.disable_signals` in plano config.
+    pub signals_enabled: bool,
 }

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

@@ -143,6 +143,7 @@ async fn llm_chat_inner(
         &request_path,
         &state.model_aliases,
         &state.llm_providers,
+        state.signals_enabled,
     )
     .await
     {
@@ -408,6 +409,7 @@ async fn parse_and_validate_request(
     request_path: &str,
     model_aliases: &Option<HashMap<String, ModelAlias>>,
     llm_providers: &Arc<RwLock<LlmProviders>>,
+    signals_enabled: bool,
 ) -> Result<PreparedRequest, Response<BoxBody<Bytes, hyper::Error>>> {
     let raw_bytes = request
         .collect()
@@ -486,7 +488,11 @@ async fn parse_and_validate_request(
     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());
+    let messages_for_signals = if signals_enabled {
+        Some(client_request.get_messages())
+    } else {
+        None
+    };
 
     // Set the upstream model name and strip routing metadata
     client_request.set_model(model_name_only.clone());

crates/brightstaff/src/main.rs

@@ -328,6 +328,8 @@ async fn init_app_state(
         .as_ref()
         .and_then(|tracing| tracing.span_attributes.clone());
 
+    let signals_enabled = !overrides.disable_signals.unwrap_or(false);
+
     Ok(AppState {
         orchestrator_service,
         model_aliases: config.model_aliases.clone(),
@@ -339,6 +341,7 @@ async fn init_app_state(
         span_attributes,
         http_client: reqwest::Client::new(),
         filter_pipeline,
+        signals_enabled,
     })
 }