feat: improve codex app controls and recovery

scripts/mock-codex-app-server.js

@@ -25,6 +25,7 @@ if (args[0] !== 'app-server') {
 const threads = new Map();
 const pendingServerRequests = new Map();
 let nextServerRequestId = 1;
+let mcpReloadCount = 0;
 
 function send(message) {
   process.stdout.write(`${JSON.stringify(message)}\n`);
@@ -429,6 +430,20 @@ function startTurn(params) {
     },
   });
 
+  if (/runtime warning/i.test(text)) {
+    const message = 'Heads up: Long threads and multiple compactions can cause the model to be less accurate. Start a new thread when possible to keep threads small and targeted.';
+    for (let i = 0; i < 2; i += 1) {
+      send({
+        method: 'warning',
+        params: {
+          threadId: thread.id,
+          turnId,
+          message,
+        },
+      });
+    }
+  }
+
   if (/collaboration/i.test(text)) {
     completeTurn(thread, turnId, `collaboration mode: ${collaborationSummary(params)}`);
     return { turn: { id: turnId, status: 'running', items: [] } };
@@ -516,6 +531,11 @@ function handleRequest(message) {
       send({ id, result: { data: [{ mode: 'default' }, { mode: 'plan' }] } });
       return;
     }
+    if (method === 'config/mcpServer/reload') {
+      mcpReloadCount += 1;
+      send({ id, result: { reloaded: true, reloadCount: mcpReloadCount } });
+      return;
+    }
     if (method === 'thread/start') {
       const thread = ensureThread(null, params);
       send({ id, result: { thread: threadPayload(thread), model: params.model || 'gpt-5.5', cwd: thread.cwd, modelProvider: 'mock', approvalPolicy: params.approvalPolicy || 'never', approvalsReviewer: 'user', sandbox: params.sandbox || 'danger-full-access' } });