chore: prepare Hermes for Homebrew packaging (#4099)

Co-authored-by: Yabuku-xD <78594762+Yabuku-xD@users.noreply.github.com>

tests/hermes_cli/test_managed_installs.py

@@ -0,0 +1,54 @@
+from types import SimpleNamespace
+from unittest.mock import patch
+
+from hermes_cli.config import (
+    format_managed_message,
+    get_managed_system,
+    recommended_update_command,
+)
+from hermes_cli.main import cmd_update
+from tools.skills_hub import OptionalSkillSource
+
+
+def test_get_managed_system_homebrew(monkeypatch):
+    monkeypatch.setenv("HERMES_MANAGED", "homebrew")
+
+    assert get_managed_system() == "Homebrew"
+    assert recommended_update_command() == "brew upgrade hermes-agent"
+
+
+def test_format_managed_message_homebrew(monkeypatch):
+    monkeypatch.setenv("HERMES_MANAGED", "homebrew")
+
+    message = format_managed_message("update Hermes Agent")
+
+    assert "managed by Homebrew" in message
+    assert "brew upgrade hermes-agent" in message
+
+
+def test_recommended_update_command_defaults_to_hermes_update(monkeypatch):
+    monkeypatch.delenv("HERMES_MANAGED", raising=False)
+
+    assert recommended_update_command() == "hermes update"
+
+
+def test_cmd_update_blocks_managed_homebrew(monkeypatch, capsys):
+    monkeypatch.setenv("HERMES_MANAGED", "homebrew")
+
+    with patch("hermes_cli.main.subprocess.run") as mock_run:
+        cmd_update(SimpleNamespace())
+
+    assert not mock_run.called
+    captured = capsys.readouterr()
+    assert "managed by Homebrew" in captured.err
+    assert "brew upgrade hermes-agent" in captured.err
+
+
+def test_optional_skill_source_honors_env_override(monkeypatch, tmp_path):
+    optional_dir = tmp_path / "optional-skills"
+    optional_dir.mkdir()
+    monkeypatch.setenv("HERMES_OPTIONAL_SKILLS", str(optional_dir))
+
+    source = OptionalSkillSource()
+
+    assert source._optional_dir == optional_dir