diff --git a/main.py b/main.py
index 5500559..e21ef1e 100644
--- a/main.py
+++ b/main.py
@@ -470,5 +470,29 @@ def calculate_poi(poi_id: int, travel_modes: str, listing_type: str) -> None:
     click.echo(f"Computed {total} distances")
 
 
+from cli._context import CliContext
+from cli.districts import districts_group
+
+
+@cli.group("debug")
+@click.option("--user-email", "-u", required=True, help="Email of user to impersonate")
+@click.option("--http", "use_http", is_flag=True, default=False, help="Use HTTP requests instead of direct service calls")
+@click.option("--json", "json_output", is_flag=True, default=False, help="Output in JSON format")
+@click.option("--api-url", default="http://localhost:8000", help="API base URL for HTTP mode")
+@click.pass_context
+def debug(ctx: click.Context, user_email: str, use_http: bool, json_output: bool, api_url: str) -> None:
+    """Debug CLI — mirrors web UI interactions with superuser access."""
+    ctx.ensure_object(dict)
+    ctx.obj["cli_ctx"] = CliContext(
+        user_email=user_email,
+        use_http=use_http,
+        json_output=json_output,
+        api_base_url=api_url,
+    )
+
+
+debug.add_command(districts_group)
+
+
 if __name__ == "__main__":
     cli()
diff --git a/tests/unit/test_debug_cli.py b/tests/unit/test_debug_cli.py
new file mode 100644
index 0000000..a369c16
--- /dev/null
+++ b/tests/unit/test_debug_cli.py
@@ -0,0 +1,56 @@
+"""Tests for the debug CLI."""
+from unittest.mock import MagicMock, patch
+
+from click.testing import CliRunner
+
+from main import cli
+
+
+class TestDebugGroup:
+    """Tests for the debug command group."""
+
+    @patch("main.engine", new_callable=MagicMock)
+    def test_debug_help_shows_subcommands(self, mock_engine: MagicMock) -> None:
+        runner = CliRunner()
+        result = runner.invoke(cli, ["debug", "--help"])
+        assert result.exit_code == 0
+        assert "districts" in result.output
+
+    @patch("main.engine", new_callable=MagicMock)
+    def test_debug_requires_user_email(self, mock_engine: MagicMock) -> None:
+        runner = CliRunner()
+        result = runner.invoke(cli, ["debug", "districts", "list"])
+        assert result.exit_code != 0
+        assert "user-email" in result.output.lower() or "Missing" in result.output
+
+
+class TestDistrictsCommand:
+    """Tests for debug districts subcommand."""
+
+    @patch("cli.districts.district_service.get_all_districts")
+    @patch("main.engine", new_callable=MagicMock)
+    def test_list_districts_direct(
+        self, mock_engine: MagicMock, mock_get: MagicMock
+    ) -> None:
+        mock_get.return_value = {"London": "R1", "Camden": "R2"}
+        runner = CliRunner()
+        result = runner.invoke(
+            cli, ["debug", "-u", "test@example.com", "districts", "list"]
+        )
+        assert result.exit_code == 0
+        assert "London" in result.output
+
+    @patch("cli.districts.district_service.get_all_districts")
+    @patch("main.engine", new_callable=MagicMock)
+    def test_list_districts_json(
+        self, mock_engine: MagicMock, mock_get: MagicMock
+    ) -> None:
+        mock_get.return_value = {"London": "R1"}
+        runner = CliRunner()
+        result = runner.invoke(
+            cli, ["debug", "-u", "test@example.com", "--json", "districts", "list"]
+        )
+        assert result.exit_code == 0
+        import json
+        data = json.loads(result.output)
+        assert "London" in data