Remove plugin cache config reflex

notes/fresh-workspace-handoff.md

@@ -774,6 +774,11 @@ MCP dependency install, or advertises plugin capability summaries. MCP remains
 a JSON-RPC protocol edge; Codex apps/skills/plugins no longer get smuggled
 through that edge as if they were the protocol.
 
+The config-mutation plugin/skill cache reflex is gone too. App-server still
+notifies remote control after successful config writes, but it no longer pokes
+`plugins_manager` or `skills_manager` as a dead compensator for disabled
+product surfaces.
+
 The Phase 6 freshness slice is landed. It exposes read-only
 `thread/epiphany/freshness` from live retrieval summaries plus graph
 frontier/churn state and, for loaded threads, watcher-backed invalidation

vendor/codex/codex-rs/app-server/src/codex_message_processor.rs

@@ -639,15 +639,6 @@ impl CodexMessageProcessor {
             .await
     }
 
-    pub(crate) fn handle_config_mutation(&self) {
-        self.clear_plugin_related_caches();
-    }
-
-    fn clear_plugin_related_caches(&self) {
-        self.thread_manager.plugins_manager().clear_cache();
-        self.thread_manager.skills_manager().clear_cache();
-    }
-
     fn current_account_updated_notification(&self) -> AccountUpdatedNotification {
         let auth = self.auth_manager.auth_cached();
         AccountUpdatedNotification {

vendor/codex/codex-rs/app-server/src/message_processor.rs

@@ -1045,7 +1045,6 @@ impl MessageProcessor {
     }
 
     async fn handle_config_mutation(&self) {
-        self.codex_message_processor.handle_config_mutation();
         let Some(remote_control_handle) = &self.remote_control_handle else {
             return;
         };