feat: Add telemetry, timing, and detailed logging across server, stub, and nvim-core

nvim-core/src/lib.rs

@@ -524,9 +524,18 @@ pub async fn run_mcp_loop(app_name: &str, app_version: &str) {
 
         tokio::spawn(async move {
             let id = msg.id.clone().unwrap_or(json!(null));
-            let _start_time = std::time::Instant::now();
+            let id_clone = id.clone();
+            let start_time = std::time::Instant::now();
+            let method_clone = if msg.method == "tools/call" {
+                let tool_name = msg.params.as_ref().and_then(|p| p.get("name")).and_then(|n| n.as_str()).unwrap_or("unknown");
+                format!("ToolCall[{}]", tool_name)
+            } else {
+                msg.method.clone()
+            };
+
 
             match msg.method.as_str() {
+
                 "initialize" => {
                     let init = rmcp::model::InitializeResult::new(
                         rmcp::model::ServerCapabilities::builder()
@@ -818,10 +827,14 @@ pub async fn run_mcp_loop(app_name: &str, app_version: &str) {
                     }
                 }
             }
+            let elapsed = start_time.elapsed();
+            tracing::info!("<<< [Nvim] {} (id: {}) completed in {:?}", method_clone, id_clone, elapsed);
         });
     }
 }
 
+
+
 fn init_logging(app_name: &str) -> tracing_appender::non_blocking::WorkerGuard {
     let log_dir = dirs::home_dir()
         .unwrap_or_default()