Revert "Move skills watcher to app-server" (#21460)

Reverts openai/codex#21287

codex-rs/app-server/src/request_processors/thread_processor.rs

@@ -316,7 +316,6 @@ pub(crate) struct ThreadRequestProcessor {
     pub(super) thread_goal_processor: ThreadGoalRequestProcessor,
     pub(super) state_db: Option<StateDbHandle>,
     pub(super) background_tasks: TaskTracker,
-    pub(super) skills_watcher: Arc<SkillsWatcher>,
 }
 
 impl ThreadRequestProcessor {
@@ -335,7 +334,6 @@ impl ThreadRequestProcessor {
         thread_list_state_permit: Arc<Semaphore>,
         thread_goal_processor: ThreadGoalRequestProcessor,
         state_db: Option<StateDbHandle>,
-        skills_watcher: Arc<SkillsWatcher>,
     ) -> Self {
         Self {
             auth_manager,
@@ -352,7 +350,6 @@ impl ThreadRequestProcessor {
             thread_goal_processor,
             state_db,
             background_tasks: TaskTracker::new(),
-            skills_watcher,
         }
     }
 
@@ -745,7 +742,6 @@ impl ThreadRequestProcessor {
             thread_list_state_permit: self.thread_list_state_permit.clone(),
             fallback_model_provider: self.config.model_provider_id.clone(),
             codex_home: self.config.codex_home.to_path_buf(),
-            skills_watcher: Arc::clone(&self.skills_watcher),
         }
     }
 
@@ -843,7 +839,6 @@ impl ThreadRequestProcessor {
             thread_list_state_permit: self.thread_list_state_permit.clone(),
             fallback_model_provider: self.config.model_provider_id.clone(),
             codex_home: self.config.codex_home.to_path_buf(),
-            skills_watcher: Arc::clone(&self.skills_watcher),
         };
         let request_trace = request_context.request_trace();
         let config_manager = self.config_manager.clone();
@@ -1044,6 +1039,7 @@ impl ThreadRequestProcessor {
                 .collect()
         };
         let core_dynamic_tool_count = core_dynamic_tools.len();
+
         let NewThread {
             thread_id,
             thread,