chore: use shared output resolver

Co-authored-by: fuxingloh <4266087+fuxingloh@users.noreply.github.com>

Author: Copilot

packages/use-agently/src/bin.ts

@@ -4,12 +4,17 @@ import { cli } from "./cli";
 import { checkAutoUpdate } from "./commands/update.js";
 import { installTelemetry, flushTelemetry } from "./telemetry.js";
 import { handleCliError } from "./errors.js";
+import { getOutputFormat } from "./output.js";
 
 installTelemetry(cli);
 
 function resolveOutputFormat(): "tui" | "json" {
-  const opts = cli.optsWithGlobals?.();
-  if (opts?.output === "tui" || opts?.output === "json") return opts.output;
+  try {
+    return getOutputFormat(cli);
+  } catch {
+    // Fallback for unexpected failures before Commander parses options.
+    return process.stderr.isTTY ? "tui" : "json";
+  }
   return process.stderr.isTTY ? "tui" : "json";
 }
 

packages/use-agently/src/errors.test.ts

@@ -9,7 +9,7 @@ describe("handleCliError", () => {
   beforeEach(() => {
     originalIsTTY = process.stderr.isTTY;
     exitSpy = spyOn(process, "exit").mockImplementation((code?: number) => {
-      throw new Error(`exit:${code}`);
+      throw new Error(`exit:${code ?? 0}`);
     });
     errorSpy = spyOn(console, "error").mockImplementation(() => {});
   });