Promote image_detail_original to experimental (#16957)

codex-rs/features/src/lib.rs

@@ -640,7 +640,11 @@ pub const FEATURES: &[FeatureSpec] = &[
     FeatureSpec {
         id: Feature::ImageDetailOriginal,
         key: "image_detail_original",
-        stage: Stage::UnderDevelopment,
+        stage: Stage::Experimental {
+            name: "Original image detail",
+            menu_description: "Let the model inspect tool-emitted images at full resolution on supported models instead of a resized approximation. This affects tool-emitted images such as those produced by `view_image`, not images attached directly in the UI. It is particularly important for localization and precise UI targeting, for reading small text, and for reasoning about precise layout.",
+            announcement: "NEW: Original image detail is now available in /experimental. Enable it to let tools request full-resolution image detail on supported models for CUA and localization tasks.",
+        },
         default_enabled: false,
     },
     FeatureSpec {

codex-rs/features/src/tests.rs

@@ -156,15 +156,6 @@ fn tool_call_mcp_elicitation_is_stable_and_enabled_by_default() {
     assert_eq!(Feature::ToolCallMcpElicitation.default_enabled(), true);
 }
 
-#[test]
-fn image_detail_original_feature_is_under_development() {
-    assert_eq!(
-        Feature::ImageDetailOriginal.stage(),
-        Stage::UnderDevelopment
-    );
-    assert_eq!(Feature::ImageDetailOriginal.default_enabled(), false);
-}
-
 #[test]
 fn remote_control_is_under_development() {
     assert_eq!(Feature::RemoteControl.stage(), Stage::UnderDevelopment);