diff --git a/codex-rs/app-server/src/codex_message_processor.rs b/codex-rs/app-server/src/codex_message_processor.rs
index 62d250dc0..891100fe4 100644
--- a/codex-rs/app-server/src/codex_message_processor.rs
+++ b/codex-rs/app-server/src/codex_message_processor.rs
@@ -2590,7 +2590,7 @@ impl CodexMessageProcessor {
                 initial_history: InitialHistory::Forked(rollout_items),
                 session_source: None,
                 dynamic_tools: Vec::new(),
-                persist_extended_history: true,
+                persist_extended_history: false,
                 metrics_service_name: None,
                 parent_trace: None,
                 environments,
diff --git a/codex-rs/tui/src/app_server_session.rs b/codex-rs/tui/src/app_server_session.rs
index 93d671fbc..c698a76dc 100644
--- a/codex-rs/tui/src/app_server_session.rs
+++ b/codex-rs/tui/src/app_server_session.rs
@@ -1175,7 +1175,7 @@ fn thread_start_params_from_config(
         config: config_request_overrides_from_config(config),
         ephemeral: Some(config.ephemeral),
         session_start_source,
-        persist_extended_history: true,
+        persist_extended_history: false,
         ..ThreadStartParams::default()
     }
 }
@@ -1206,7 +1206,7 @@ fn thread_resume_params_from_config(
         sandbox,
         permissions,
         config: config_request_overrides_from_config(&config),
-        persist_extended_history: true,
+        persist_extended_history: false,
         ..ThreadResumeParams::default()
     }
 }
@@ -1240,7 +1240,7 @@ fn thread_fork_params_from_config(
         base_instructions: config.base_instructions.clone(),
         developer_instructions: config.developer_instructions.clone(),
         ephemeral: config.ephemeral,
-        persist_extended_history: true,
+        persist_extended_history: false,
         ..ThreadForkParams::default()
     }
 }