Reach OpenCode Go from the command line

test-key accepts opencode and reports the model count its /models
endpoint offers, ask --provider accepts it and maps --model to its own
setting, doctor reports its key for cleanup on it, and config list
masks the key like the other two.

tests/test_cli.py

@@ -423,6 +423,16 @@ class Providers(DikteTest):
         self.assertIn("groq", out)
         self.assertIn("Groq", out)
 
+    def test_opencode_is_a_choice_and_reports_under_its_own_name(self):
+        parser = cli.build_parser()
+        self.assertEqual(
+            parser.parse_args(["test-key", "opencode"]).which, "opencode")
+        self.write_config({"opencode_api_key": "opencode-test"})
+        with fake_urlopen({"data": [{"id": "deepseek-v4-flash"}]}):
+            code, out, _ = self.run_cmd(cli.cmd_test_key, which="opencode")
+        self.assertEqual(code, 0)
+        self.assertIn("opencode: connection works, 1 models visible", out)
+
 
 class Updates(DikteTest):
     """`dikte update` looks, says what it found, and installs nothing."""
@@ -503,6 +513,15 @@ class Doctor(DikteTest):
         self.assertIn("OpenRouter key, cleaning up on some/model",
                       self.run_doctor(as_json=False, cleanup_model="some/model"))
 
+    def test_cleanup_on_opencode_is_a_question_about_its_own_key(self):
+        reply = self.run_doctor(cleanup_provider="opencode",
+                                cleanup_opencode_model="glm-5.3")
+        self.assertEqual(reply["cleanup"]["provider"], "opencode")
+        self.assertEqual(reply["cleanup"]["model"], "glm-5.3")
+        self.assertIn("OpenCode Go key, cleaning up on glm-5.3",
+                      self.run_doctor(as_json=False, cleanup_provider="opencode",
+                                      cleanup_opencode_model="glm-5.3"))
+
     def test_it_asks_after_the_programs_this_desktop_actually_uses(self):
         """A missing ydotool on a Mac is a red mark with nothing behind it."""
         with mock.patch.object(cli.paste, "desktop", return_value=paste.MACOS):