fix: mark config set arguments as placeholders

tests/hermes_cli/test_placeholder_usage.py

@@ -0,0 +1,29 @@
+"""Tests for CLI placeholder text in config/setup output."""
+
+import os
+from argparse import Namespace
+from unittest.mock import patch
+
+import pytest
+
+from hermes_cli.config import config_command
+from hermes_cli.setup import _print_setup_summary
+
+
+def test_config_set_usage_marks_placeholders(capsys):
+    args = Namespace(config_command="set", key=None, value=None)
+
+    with pytest.raises(SystemExit) as exc:
+        config_command(args)
+
+    assert exc.value.code == 1
+    out = capsys.readouterr().out
+    assert "Usage: hermes config set <key> <value>" in out
+
+
+def test_setup_summary_marks_placeholders(tmp_path, capsys):
+    with patch.dict(os.environ, {"HERMES_HOME": str(tmp_path)}):
+        _print_setup_summary({"tts": {"provider": "edge"}}, tmp_path)
+
+    out = capsys.readouterr().out
+    assert "hermes config set <key> <value>" in out