test: add integration tests for CLI status command JSON output

tests/test_cli_status.py

@@ -0,0 +1,50 @@
+import json
+import subprocess
+import sys
+import tempfile
+import unittest
+from pathlib import Path
+
+from hermes_collab_engine.store import CollabStore
+
+
+REPO_ROOT = Path(__file__).resolve().parents[1]
+
+
+def run_cli(*args: str) -> subprocess.CompletedProcess:
+    return subprocess.run(
+        [sys.executable, "-m", "hermes_collab_engine.cli", *args],
+        capture_output=True,
+        text=True,
+        check=False,
+        cwd=str(REPO_ROOT),
+    )
+
+
+class StatusCliTests(unittest.TestCase):
+    def test_status_json_returns_expected_structure(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            db_path = Path(tmp) / "db.sqlite3"
+            # Initialize an empty store to avoid using real runtime databases
+            CollabStore(db_path)
+
+            proc = run_cli("status", "--db", str(db_path), "--json")
+
+            self.assertEqual(proc.returncode, 0, msg=f"stdout={proc.stdout!r} stderr={proc.stderr!r}")
+
+            try:
+                result = json.loads(proc.stdout)
+            except json.JSONDecodeError:
+                self.fail(f"CLI output is not valid JSON: {proc.stdout}")
+
+            self.assertIn("overview", result)
+            self.assertIn("runs", result)
+            self.assertIn("lessons", result)
+
+            self.assertIsInstance(result["overview"], dict)
+            self.assertIsInstance(result["runs"], list)
+            self.assertIsInstance(result["lessons"], list)
+
+
+if __name__ == "__main__":
+    unittest.main()