Prevent --json from prompting interactively on a 403

Per review: --json still went through _create_host_backend_client
and _call_host_backend_with_optional_tenant, both of which prompt
interactively (writing to stdout, reading stdin) when the module-
level _no_input flag is left at its default False. deploy_listeners_
list never set it, unlike the main deploy command, so a missing API
key or an org-scoped key without LANGSMITH_TENANT_ID would corrupt
the JSON output with warning text and could hang waiting for input
that a scripted invocation never provides.

Sets _no_input = json_output at the top of the command, same pattern
_deploy_cmd already uses, so both paths raise a ClickException to
stderr instead. Added a regression test that fails without the fix
(click.prompt is genuinely invoked) and passes with it.

libs/cli/langgraph_cli/deploy.py

@@ -2536,6 +2536,8 @@ def deploy_listeners() -> None:
 def deploy_listeners_list(
     api_key: str | None, host_url: str | None, json_output: bool
 ) -> None:
+    global _no_input
+    _no_input = json_output
     client = _create_host_backend_client(host_url, api_key)
     listeners = _call_host_backend_with_optional_tenant(
         client, lambda c: c.list_listeners()

libs/cli/tests/unit_tests/cli/test_cli.py

@@ -14,6 +14,7 @@ import langgraph_cli.deploy as deploy_module
 from langgraph_cli.cli import cli, prepare_args_and_stdin
 from langgraph_cli.config import Config, _get_pip_cleanup_lines, validate_config
 from langgraph_cli.docker import DEFAULT_POSTGRES_URI, DockerCapabilities, Version
+from langgraph_cli.host_backend import HostBackendError
 from langgraph_cli.util import clean_empty_lines
 
 FORMATTED_CLEANUP_LINES = _get_pip_cleanup_lines(
@@ -536,6 +537,9 @@ def test_deploy_listeners_list_command_no_results(monkeypatch) -> None:
 
 
 def test_deploy_listeners_list_command_json(monkeypatch) -> None:
+    # --json sets the module-level _no_input global as a side effect; pin
+    # the "before" value so monkeypatch restores it after this test.
+    monkeypatch.setattr(deploy_module, "_no_input", False)
     runner = CliRunner()
 
     listeners = [
@@ -579,6 +583,9 @@ def test_deploy_listeners_list_command_json(monkeypatch) -> None:
 
 
 def test_deploy_listeners_list_command_json_no_results(monkeypatch) -> None:
+    # --json sets the module-level _no_input global as a side effect; pin
+    # the "before" value so monkeypatch restores it after this test.
+    monkeypatch.setattr(deploy_module, "_no_input", False)
     runner = CliRunner()
 
     class FakeClient:
@@ -608,6 +615,52 @@ def test_deploy_listeners_list_command_json_no_results(monkeypatch) -> None:
     assert json.loads(result.output) == []
 
 
+def test_deploy_listeners_list_command_json_org_scoped_403(monkeypatch) -> None:
+    """With --json, an org-scoped 403 must raise cleanly instead of
+    prompting for a workspace ID, which would write to stdout and hang
+    waiting for input that a scripted invocation never provides."""
+    # deploy_listeners_list sets the module-level _no_input global as a
+    # side effect; pin its "before" value so monkeypatch restores it after
+    # this test instead of leaking True into whichever test runs next.
+    monkeypatch.setattr(deploy_module, "_no_input", False)
+    runner = CliRunner()
+
+    class FakeClient:
+        def __init__(self, host_url: str, api_key: str, tenant_id: str | None = None):
+            pass
+
+        def list_listeners(self):
+            raise HostBackendError("requires workspace specification", status_code=403)
+
+        def set_tenant(self, tenant_id: str) -> None:
+            raise AssertionError("must not retry with a prompted tenant with --json")
+
+    monkeypatch.setattr(deploy_module, "HostBackendClient", FakeClient)
+
+    prompt_calls = []
+    monkeypatch.setattr(
+        click, "prompt", lambda *a, **k: prompt_calls.append((a, k)) or "unreachable"
+    )
+
+    result = runner.invoke(
+        cli,
+        [
+            "deploy",
+            "listeners",
+            "list",
+            "--json",
+            "--api-key",
+            "test-key",
+            "--host-url",
+            "https://api.example.com",
+        ],
+    )
+
+    assert prompt_calls == [], "must not prompt interactively with --json"
+    assert result.exit_code != 0
+    assert "LANGSMITH_TENANT_ID" in result.output
+
+
 def test_deploy_revisions_list_command(monkeypatch) -> None:
     runner = CliRunner()
     captured: dict[str, str] = {}