test(integrations): expect native fallback invocation

Assisted-by: GitHub Copilot (model: GPT-5.6 Sol, autonomous)

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 02f9e138-da58-4a60-93b9-eae659d2aa19

Author: BenBtg

tests/integrations/test_integration_subcommand.py

@@ -2307,7 +2307,7 @@ def test_failed_switch_keeps_fallback_metadata_consistent(self, tmp_path):
         assert opts["ai"] == "codex"
 
         template = project / ".specify" / "templates" / "plan-template.md"
-        assert "/speckit-plan" in template.read_text(encoding="utf-8")
+        assert "$speckit-plan" in template.read_text(encoding="utf-8")
 
 
 class TestIntegrationUpgrade: