Add default code-mode yield timeout (#14484)

Summary
- expose the default yield timeout through code mode runtime so the
handler, wait tool, and protocol share the same 10s value that matches
unified exec
- document the timeout change in the tool descriptions and propagate the
value all the way into the runner metadata
- adjust Cargo.lock to keep the dependency tree in sync with the added
code mode tool dependency

Testing
- Not run (not requested)

codex-rs/core/src/tools/code_mode/execute_handler.rs

@@ -48,6 +48,7 @@ impl CodeModeExecuteHandler {
         let message = HostToNodeMessage::Start {
             request_id: request_id.clone(),
             session_id,
+            default_yield_time_ms: super::DEFAULT_EXEC_YIELD_TIME_MS,
             enabled_tools,
             stored_values,
             source,

codex-rs/core/src/tools/code_mode/mod.rs

@@ -35,6 +35,7 @@ const CODE_MODE_WAIT_DESCRIPTION_TEMPLATE: &str = include_str!("wait_description
 
 pub(crate) const PUBLIC_TOOL_NAME: &str = "exec";
 pub(crate) const WAIT_TOOL_NAME: &str = "exec_wait";
+pub(crate) const DEFAULT_EXEC_YIELD_TIME_MS: u64 = 10_000;
 pub(crate) const DEFAULT_WAIT_YIELD_TIME_MS: u64 = 10_000;
 
 #[derive(Clone)]

codex-rs/core/src/tools/code_mode/protocol.rs

@@ -41,6 +41,7 @@ pub(super) enum HostToNodeMessage {
     Start {
         request_id: String,
         session_id: i32,
+        default_yield_time_ms: u64,
         enabled_tools: Vec<EnabledTool>,
         stored_values: HashMap<String, JsonValue>,
         source: String,

codex-rs/core/src/tools/code_mode/runner.cjs

@@ -572,6 +572,7 @@ function startSession(protocol, sessions, start) {
   const session = {
     completed: false,
     content_items: [],
+    default_yield_time_ms: normalizeYieldTime(start.default_yield_time_ms),
     id: start.session_id,
     initial_yield_timer: null,
     initial_yield_triggered: false,
@@ -585,6 +586,7 @@ function startSession(protocol, sessions, start) {
     }),
   };
   sessions.set(session.id, session);
+  scheduleInitialYield(protocol, session, session.default_yield_time_ms);
 
   session.worker.on('message', (message) => {
     void handleWorkerMessage(protocol, sessions, session, message).catch((error) => {
@@ -697,6 +699,9 @@ async function sendYielded(protocol, session) {
   if (session.completed || session.request_id === null) {
     return;
   }
+  session.initial_yield_timer = clearTimer(session.initial_yield_timer);
+  session.initial_yield_triggered = true;
+  session.poll_yield_timer = clearTimer(session.poll_yield_timer);
   const contentItems = takeContentItems(session);
   const requestId = session.request_id;
   try {