diff --git a/codex-rs/features/src/lib.rs b/codex-rs/features/src/lib.rs
index 1cfd18416c..7180ffbacd 100644
--- a/codex-rs/features/src/lib.rs
+++ b/codex-rs/features/src/lib.rs
@@ -2319,8 +2319,8 @@ pub const FEATURES: &[FeatureSpec] = &[
     FeatureSpec {
         id: Feature::RetainClientToolOutputs,
         key: "retain_client_tool_outputs",
-        stage: Stage::UnderDevelopment,
-        default_enabled: false,
+        stage: Stage::Stable,
+        default_enabled: true,
     },
     FeatureSpec {
         id: Feature::UseAgentIdentity,