fix(server): return version details in health and shutdown endpoints

server/src/api/rest.rs

@@ -104,8 +104,16 @@ pub async fn gate_set_handler(
     Ok((axum::http::StatusCode::OK, "Gate state updated."))
 }
 
-pub async fn health_handler() -> &'static str {
-    "OK"
+pub async fn health_handler() -> impl IntoResponse {
+    axum::Json(serde_json::json!({
+        "status": "ok",
+        "version": {
+            "app_version": env!("APP_VERSION"),
+            "cargo_pkg_version": env!("CARGO_PKG_VERSION"),
+            "target_os": std::env::consts::OS,
+            "target_arch": std::env::consts::ARCH,
+        }
+    }))
 }
 
 #[cfg(test)]

server/src/api/setup.rs

@@ -143,7 +143,17 @@ pub fn create_router(app_state: Arc<AppState>) -> Router {
                         std::process::exit(0);
                     });
 
-                    (axum::http::StatusCode::OK, "Shutting down...").into_response()
+                    axum::Json(serde_json::json!({
+                        "status": "shutting_down",
+                        "message": "MCP Memory Server gracefully shutting down.",
+                        "version_details": {
+                            "app_version": env!("APP_VERSION"),
+                            "cargo_pkg_version": env!("CARGO_PKG_VERSION"),
+                            "target_os": std::env::consts::OS,
+                            "target_arch": std::env::consts::ARCH,
+                            "shutdown_checkpoint": format!("chk_shutdown_{}", now)
+                        }
+                    })).into_response()
                 },
             ),
         )