Ask Codex itself which models it offers

The Codex model boxes carried a hand-written list, which was already out of
date. The settings window now asks `codex debug models` for the catalog the
CLI's own picker reads, off the interface thread, and refills both boxes with
it; the built-in list is only what is on screen until Codex answers, or when
it is not installed at all.

dikte/assistant.py

@@ -338,6 +338,33 @@ def _codex_label(item):
     return t("Using {name}…", name=item_type or "a tool")
 
 
+def codex_models():
+    """The models Codex itself would offer right now, best first.
+
+    `codex debug models` prints the catalog the CLI's own model picker reads,
+    fetched from OpenAI and cached beside Codex's config, so the list is as
+    current as the installed Codex and there is no second list to keep up to
+    date here. Entries the picker hides are internal and stay hidden. A machine
+    without Codex, or one too old to have the command, answers with nothing and
+    the caller keeps its built-in list.
+    """
+    if not shutil.which("codex"):
+        return []
+    try:
+        proc = subprocess.run(["codex", "debug", "models"],
+                              capture_output=True, text=True, timeout=30)
+        catalog = json.loads(proc.stdout or "null")
+    except (OSError, subprocess.SubprocessError, ValueError):
+        return []
+    if not isinstance(catalog, dict):
+        return []
+    rows = [row for row in catalog.get("models") or []
+            if isinstance(row, dict) and row.get("slug")
+            and row.get("visibility") != "hide"]
+    rows.sort(key=lambda row: row.get("priority") or 0)
+    return [row["slug"] for row in rows]
+
+
 # --- OpenRouter -----------------------------------------------------------
 
 def _ask_openrouter(prompt, conf, on_stage):

dikte/settings_ui.py

@@ -79,7 +79,11 @@ ASSISTANT_PROVIDERS = [
 # Aliases resolve to the newest model of that name, so they age better than an
 # id does; a full id can be typed in when a particular one is wanted.
 ASSISTANT_MODELS = ["sonnet", "opus", "haiku", "fable"]
-CODEX_MODELS = ["gpt-5.4-codex", "gpt-5.4", "o4-mini"]
+# What the Codex boxes offer before Codex itself has answered, and everything
+# they offer when it cannot: the real list comes from `codex debug models` when
+# the window opens, so this only has to be roughly right.
+CODEX_MODELS = ["gpt-5.6-sol", "gpt-5.6-terra", "gpt-5.6-luna",
+                "gpt-5.5", "gpt-5.4", "gpt-5.4-mini"]
 # Starting points only; the box is editable and OpenRouter has hundreds.
 ASSISTANT_OR_MODELS = [
     "google/gemini-3.5-flash", "anthropic/claude-sonnet-5", "openai/gpt-5.4",
@@ -521,6 +525,7 @@ class SettingsWindow(QDialog):
 
     _models_loaded = pyqtSignal(list, str)
     _transcribe_models_loaded = pyqtSignal(list, str)
+    _codex_models_loaded = pyqtSignal(list)
     # Which key was tested, whether it worked, and what to write under it.
     _test_done = pyqtSignal(str, bool, str)
     # The release that was found, or None, and what went wrong instead.
@@ -577,6 +582,7 @@ class SettingsWindow(QDialog):
 
         self._models_loaded.connect(self._on_models_loaded)
         self._transcribe_models_loaded.connect(self._on_transcribe_models_loaded)
+        self._codex_models_loaded.connect(self._on_codex_models_loaded)
         self._test_done.connect(self._on_test_done)
         self._update_checked.connect(self._on_update_checked)
         self.transcriber.progress.connect(self._on_file_progress)
@@ -587,6 +593,7 @@ class SettingsWindow(QDialog):
             self.meetings.finished.connect(self._on_minutes_finished)
             self.meetings.failed.connect(self._on_minutes_failed)
         self._load()
+        self._load_codex_models()
         # Connected after the load, so that filling the boxes in is not taken
         # for the user ticking them.
         self.file_timestamps.toggled.connect(self._remember_file_choices)
@@ -1876,6 +1883,33 @@ class SettingsWindow(QDialog):
             combo.setCurrentText(current)
         self.models_label.setText(t("{count} models loaded.", count=len(models)))
 
+    def _load_codex_models(self):
+        """Ask Codex which models it offers, off the interface thread.
+
+        No button and no network of ours: the CLI answers from its own cache in
+        well under a second. Skipped when Codex is not installed, which is also
+        when the built-in list stays on screen and nobody is running Codex
+        anyway.
+        """
+        if not shutil.which("codex"):
+            return
+
+        def work():
+            found = assistant.codex_models()
+            if found:
+                self._codex_models_loaded.emit(found)
+
+        threading.Thread(target=work, daemon=True).start()
+
+    def _on_codex_models_loaded(self, models):
+        for combo in (self.cleanup_codex_model, self.assistant_codex_model):
+            current = combo.currentText()
+            combo.clear()
+            combo.addItem(t("Codex's own default"), "")
+            for name in models:
+                combo.addItem(name, name)
+            combo.setCurrentText(current)
+
     def _test_openai(self):
         key, base = self._typed_key("openai")
         self._test_key("openai", lambda: t(

tests/test_assistant.py

@@ -15,7 +15,8 @@ import unittest
 from unittest import mock
 
 from dikte import assistant
-from tests.support import DikteTest, fake_urlopen, only_these_tools
+from tests.support import (DikteTest, FakeCompleted, fake_urlopen,
+                           only_these_tools)
 
 
 class FakeCli:
@@ -534,5 +535,50 @@ class Ask(DikteTest):
         self.assertEqual(assistant.stored_provider(), "")
 
 
+class CodexModels(DikteTest):
+    """The model list read off `codex debug models`."""
+
+    CATALOG = {"models": [
+        {"slug": "gpt-6-mini", "visibility": "list", "priority": 9},
+        {"slug": "gpt-6", "visibility": "list", "priority": 1},
+        {"slug": "codex-auto-review", "visibility": "hide", "priority": 3},
+    ]}
+
+    def models(self, reply, code=0):
+        with only_these_tools("codex"), \
+                mock.patch.object(subprocess, "run",
+                                  return_value=FakeCompleted(
+                                      returncode=code, stdout=reply)) as run:
+            found = assistant.codex_models()
+        self.run_call = run
+        return found
+
+    def test_the_catalog_arrives_best_first_without_the_hidden_ones(self):
+        found = self.models(json.dumps(self.CATALOG))
+        self.assertEqual(found, ["gpt-6", "gpt-6-mini"])
+        self.assertEqual(self.run_call.call_args.args[0],
+                         ["codex", "debug", "models"])
+
+    def test_a_codex_that_is_not_installed_is_not_run(self):
+        with only_these_tools(), \
+                mock.patch.object(subprocess, "run") as run:
+            self.assertEqual(assistant.codex_models(), [])
+        run.assert_not_called()
+
+    def test_a_codex_too_old_to_have_the_command(self):
+        self.assertEqual(self.models("error: unknown subcommand", code=2), [])
+
+    def test_a_catalog_that_is_not_what_was_expected(self):
+        self.assertEqual(self.models(json.dumps(["gpt-6"])), [])
+        self.assertEqual(self.models(""), [])
+
+    def test_a_codex_that_hangs_is_given_up_on(self):
+        with only_these_tools("codex"), \
+                mock.patch.object(subprocess, "run",
+                                  side_effect=subprocess.TimeoutExpired(
+                                      ["codex"], 30)):
+            self.assertEqual(assistant.codex_models(), [])
+
+
 if __name__ == "__main__":
     unittest.main()

tests/test_ui.py

@@ -133,6 +133,8 @@ class Settings(DikteTest):
                                             "_load_models"))
         self.enterContext(mock.patch.object(settings_ui.SettingsWindow,
                                             "_load_transcribe_models"))
+        self.enterContext(mock.patch.object(settings_ui.SettingsWindow,
+                                            "_load_codex_models"))
         # The local model boxes fetch their own list the moment they are shown,
         # from a thread, which is nobody's test failing but a real request.
         self.enterContext(mock.patch.object(settings_ui.LocalModelBox,
@@ -254,6 +256,19 @@ class Settings(DikteTest):
                 self.assertEqual(shown, [provider])
                 self.assertFalse(box.isHidden())
 
+    def test_codex_answering_refills_both_of_its_boxes(self):
+        """The list Codex gave replaces the built-in one, in both places, and
+        neither loses what was already picked."""
+        conf = self.config(cleanup_codex_model="my-own-model")
+        window = self.window(conf)
+        window._on_codex_models_loaded(["gpt-6", "gpt-6-mini"])
+        for combo in (window.cleanup_codex_model, window.assistant_codex_model):
+            with self.subTest(combo=combo.objectName() or "combo"):
+                offered = [combo.itemText(i) for i in range(combo.count())]
+                self.assertEqual(offered[1:], ["gpt-6", "gpt-6-mini"])
+        self.assertEqual(window.cleanup_codex_model.currentText(),
+                         "my-own-model")
+
     def test_the_update_line_names_the_version_that_is_running(self):
         window = self.window(cfg.Config())
         self.assertIn(settings_ui.__version__, window.update_status.text())
@@ -654,7 +669,9 @@ class MeetingSources(DikteTest):
                 only_these_tools(), \
                 mock.patch.object(settings_ui.SettingsWindow, "_load_models"), \
                 mock.patch.object(settings_ui.SettingsWindow,
-                                  "_load_transcribe_models"):
+                                  "_load_transcribe_models"), \
+                mock.patch.object(settings_ui.SettingsWindow,
+                                  "_load_codex_models"):
             window = settings_ui.SettingsWindow(cfg.Config())
         self.addCleanup(window.deleteLater)
         self.addCleanup(window.close)
@@ -683,6 +700,9 @@ class LocalModels(DikteTest):
         # "nothing can transcribe" question from its real binary and model.
         self.patch_attr(ggml, "BIN_DIR", self.path("bin"))
         self.patch_attr(ggml, "MODELS_DIR", self.path("models"))
+        # And one with Codex on it would ask it for its model list.
+        self.enterContext(mock.patch.object(settings_ui.SettingsWindow,
+                                            "_load_codex_models"))
 
     def window(self, conf):
         window = settings_ui.SettingsWindow(conf)