fix: surface app errors in gateway logs

2026-07-20 14:26:27 +05:30
parent aa2595ec01
commit 2b4083c6db
56 changed files with 147 additions and 86 deletions
@@ -791,10 +791,16 @@ export function createHandlers(deps: RuntimeDeps): Handlers {
      const app = process.env.WRNEXUS_APP_NAME ?? "app";
      const detail =
        err instanceof Error ? (err.stack ?? `${err.name}: ${err.message}`) : String(err);
+      const message = err instanceof Error ? `${err.name}: ${err.message}` : String(err);
      console.error(
        `[wrnexus] unhandled request error (${app}) ${req.method} ${url.pathname}\n${detail}`,
      );
-      return compressResponse(req, secure(renderError(err, mode)));
+      const response = secure(renderError(err, mode));
+      // Gateway-managed production apps bind to loopback. Carry a bounded,
+      // encoded diagnostic to the parent gateway so centralized log collectors
+      // can explain child failures; the gateway always strips this header.
+      response.headers.set("x-wrnexus-internal-error", encodeURIComponent(message.slice(0, 500)));
+      return compressResponse(req, response);
    }
  }