Add nvim_get_server_info diagnostic tool

nvim-core/src/lib.rs

@@ -1024,6 +1024,14 @@ pub async fn run_mcp_loop(app_name: &str, app_version: &str) {
                                         },
                                         "required": ["file", "pattern"]
                                     }
+                                },
+                                {
+                                    "name": "nvim_get_server_info",
+                                    "description": "Get diagnostic info about this MCP server (OS, version, executable path, backend)",
+                                    "inputSchema": {
+                                        "type": "object",
+                                        "properties": {}
+                                    }
                                 }
                             ]
                         })),
@@ -1477,6 +1485,18 @@ pub async fn run_mcp_loop(app_name: &str, app_version: &str) {
                                 send_error(id, -32602, "Missing 'code'").await;
                             }
                         }
+                        "nvim_get_server_info" => {
+                            let os = if cfg!(windows) { "Windows" } else { "Linux" };
+                            let exe_path = std::env::current_exe()
+                                .map(|p| p.to_string_lossy().to_string())
+                                .unwrap_or_else(|_| "unknown".to_string());
+                            let socket = get_socket_path().await.unwrap_or_else(|e| format!("Error: {}", e));
+                            let info = format!(
+                                "Server: {}\nVersion: {}\nOS: {}\nExecutable: {}\nBackend Socket: {}",
+                                app_name, app_version, os, exe_path, socket
+                            );
+                            send_text_result!(id, info);
+                        }
                         _ => send_error(id, -32601, "Method not found").await,
                     }
                 }