feat(mobile): add Codex task parity

apps/mobile/src/app/task/[id].tsx

@@ -1,15 +1,18 @@
 import { Text } from "@components/text";
-import { DEFAULT_CLAUDE_EXECUTION_MODE } from "@posthog/core/sessions/executionModes";
+import { getCloudReasoningConfigOptionId } from "@posthog/core/sessions/cloudSessionConfig";
+import { getDefaultExecutionModeForAdapter } from "@posthog/core/sessions/executionModes";
 import {
   countUserMessages,
   getSessionActivityPhase,
 } from "@posthog/core/sessions/sessionActivity";
 import { isTaskRunning } from "@posthog/core/tasks/taskArchive";
 import {
+  type Adapter,
+  DEFAULT_CODEX_MODEL,
   DEFAULT_GATEWAY_MODEL,
   DEFAULT_REASONING_EFFORT,
   type ExecutionMode,
-  getReasoningEffortOptions,
+  isSupportedReasoningEffort,
   type SupportedReasoningEffort,
   serializeCloudPrompt,
   type Task,
@@ -57,6 +60,7 @@ import {
 import { useTaskSessionStore } from "@/features/tasks/stores/taskSessionStore";
 import { useTaskStore } from "@/features/tasks/stores/taskStore";
 import { confirmStopRun } from "@/features/tasks/utils/archiveGuard";
+import { buildCloudTaskRunConfig } from "@/features/tasks/utils/cloudTaskRunConfig";
 import { useScreenInsets } from "@/hooks/useScreenInsets";
 import {
   ANALYTICS_EVENTS,
@@ -167,11 +171,37 @@ export default function TaskDetailScreen() {
   const [initialComposerMessage, setInitialComposerMessage] = useState<
     string | undefined
   >();
+  const composerAdapter: Adapter =
+    task?.latest_run?.runtime_adapter &&
+    !session?.terminalStatus &&
+    composerConfig?.adapter !== task.latest_run.runtime_adapter
+      ? task.latest_run.runtime_adapter
+      : (composerConfig?.adapter ??
+        task?.latest_run?.runtime_adapter ??
+        "claude");
+  const composerConfigMatchesAdapter =
+    composerConfig?.adapter === undefined
+      ? composerAdapter === "claude"
+      : composerConfig.adapter === composerAdapter;
   const composerMode: ExecutionMode =
-    composerConfig?.mode ?? DEFAULT_CLAUDE_EXECUTION_MODE;
-  const composerModel = composerConfig?.model ?? DEFAULT_GATEWAY_MODEL;
+    (composerConfigMatchesAdapter ? composerConfig?.mode : undefined) ??
+    getDefaultExecutionModeForAdapter(composerAdapter);
+  const composerModel =
+    (composerConfigMatchesAdapter ? composerConfig?.model : undefined) ??
+    task?.latest_run?.model ??
+    (composerAdapter === "codex" ? DEFAULT_CODEX_MODEL : DEFAULT_GATEWAY_MODEL);
+  const requestedComposerReasoning = composerConfigMatchesAdapter
+    ? composerConfig?.reasoning
+    : undefined;
   const composerReasoning: SupportedReasoningEffort =
-    composerConfig?.reasoning ?? DEFAULT_REASONING_EFFORT;
+    requestedComposerReasoning &&
+    isSupportedReasoningEffort(
+      composerAdapter,
+      composerModel,
+      requestedComposerReasoning,
+    )
+      ? requestedComposerReasoning
+      : DEFAULT_REASONING_EFFORT;
 
   const messagingMode = useMessagingMode(taskId);
   const queuedCount = useQueuedCount(taskId);
@@ -311,18 +341,18 @@ export default function TaskDetailScreen() {
               )
             : text;
 
-        const supportsReasoning =
-          getReasoningEffortOptions("claude", composerModel) !== null;
         const updatedTask = await getPostHogApiClient().runTaskInCloud(
           taskId,
           undefined,
           {
             resumeFromRunId: task.latest_run?.id,
             pendingUserMessage,
-            adapter: "claude",
-            model: composerModel,
-            reasoningLevel: supportsReasoning ? composerReasoning : undefined,
-            initialPermissionMode: composerMode,
+            ...buildCloudTaskRunConfig({
+              adapter: composerAdapter,
+              mode: composerMode,
+              model: composerModel,
+              reasoning: composerReasoning,
+            }),
             rtkEnabled: usePreferencesStore.getState().rtkEnabledCloud,
           },
         );
@@ -346,6 +376,7 @@ export default function TaskDetailScreen() {
       connectToTask,
       updateTaskInCache,
       composerMode,
+      composerAdapter,
       composerModel,
       composerReasoning,
     ],
@@ -500,6 +531,19 @@ export default function TaskDetailScreen() {
     [taskId, setComposerConfig, setConfigOption],
   );
 
+  const handleAdapterChange = useCallback(
+    (value: Adapter) => {
+      if (!taskId) return;
+      setComposerConfig(taskId, {
+        adapter: value,
+        mode: getDefaultExecutionModeForAdapter(value),
+        model: value === "codex" ? DEFAULT_CODEX_MODEL : DEFAULT_GATEWAY_MODEL,
+        reasoning: DEFAULT_REASONING_EFFORT,
+      });
+    },
+    [taskId, setComposerConfig],
+  );
+
   const handleModelChange = useCallback(
     (value: string) => {
       if (!taskId) return;
@@ -513,10 +557,14 @@ export default function TaskDetailScreen() {
     (value: SupportedReasoningEffort) => {
       if (!taskId) return;
       setComposerConfig(taskId, { reasoning: value });
-      setConfigOption(taskId, "effort", value).catch(() => {});
+      setConfigOption(
+        taskId,
+        getCloudReasoningConfigOptionId(composerAdapter),
+        value,
+      ).catch(() => {});
       usePreferencesStore.getState().setLastUsedReasoningEffort(value);
     },
-    [taskId, setComposerConfig, setConfigOption],
+    [taskId, composerAdapter, setComposerConfig, setConfigOption],
   );
 
   const handleStop = useCallback(() => {
@@ -568,6 +616,12 @@ export default function TaskDetailScreen() {
         undefined,
         {
           resumeFromRunId: task.latest_run?.id,
+          ...buildCloudTaskRunConfig({
+            adapter: composerAdapter,
+            mode: composerMode,
+            model: composerModel,
+            reasoning: composerReasoning,
+          }),
           rtkEnabled: usePreferencesStore.getState().rtkEnabledCloud,
         },
       );
@@ -584,7 +638,17 @@ export default function TaskDetailScreen() {
         "Could not restart the task. Please try again.",
       );
     }
-  }, [taskId, task, disconnectFromTask, connectToTask, updateTaskInCache]);
+  }, [
+    taskId,
+    task,
+    disconnectFromTask,
+    connectToTask,
+    updateTaskInCache,
+    composerAdapter,
+    composerModel,
+    composerReasoning,
+    composerMode,
+  ]);
 
   // Clear retrying once the agent finishes a turn or the run terminates.
   useEffect(() => {
@@ -778,6 +842,9 @@ export default function TaskDetailScreen() {
             />
           ) : null}
           <TaskChatComposer
+            key={taskId}
+            adapter={composerAdapter}
+            canChangeAdapter={!!session?.terminalStatus}
             onSend={handleSendPrompt}
             restoredDraft={restoredDraft}
             editing={!!editingQueuedId}
@@ -791,6 +858,7 @@ export default function TaskDetailScreen() {
             mode={composerMode}
             model={composerModel}
             reasoning={composerReasoning}
+            onAdapterChange={handleAdapterChange}
             onModeChange={handleModeChange}
             onModelChange={handleModelChange}
             onReasoningChange={handleReasoningChange}