Aligned feature stage names with public feature maturity stages (#9929)

We've recently standardized a [feature maturity
model](https://developers.openai.com/codex/feature-maturity) that we're
using in our docs and support forums to communicate expectations to
users. This PR updates the internal stage names and descriptions to
match.

This change involves a simple internal rename and updates to a few
user-visible strings. No functional change.

codex-rs/tui/src/bottom_pane/experimental_features_view.rs

@@ -29,7 +29,7 @@ use super::selection_popup_common::GenericDisplayRow;
 use super::selection_popup_common::measure_rows_height;
 use super::selection_popup_common::render_rows;
 
-pub(crate) struct BetaFeatureItem {
+pub(crate) struct ExperimentalFeatureItem {
     pub feature: Feature,
     pub name: String,
     pub description: String,
@@ -37,7 +37,7 @@ pub(crate) struct BetaFeatureItem {
 }
 
 pub(crate) struct ExperimentalFeaturesView {
-    features: Vec<BetaFeatureItem>,
+    features: Vec<ExperimentalFeatureItem>,
     state: ScrollState,
     complete: bool,
     app_event_tx: AppEventSender,
@@ -46,11 +46,14 @@ pub(crate) struct ExperimentalFeaturesView {
 }
 
 impl ExperimentalFeaturesView {
-    pub(crate) fn new(features: Vec<BetaFeatureItem>, app_event_tx: AppEventSender) -> Self {
+    pub(crate) fn new(
+        features: Vec<ExperimentalFeatureItem>,
+        app_event_tx: AppEventSender,
+    ) -> Self {
         let mut header = ColumnRenderable::new();
         header.push(Line::from("Experimental features".bold()));
         header.push(Line::from(
-            "Toggle beta features. Changes are saved to config.toml.".dim(),
+            "Toggle experimental features. Changes are saved to config.toml.".dim(),
         ));
 
         let mut view = Self {

codex-rs/tui/src/bottom_pane/mod.rs

@@ -108,7 +108,7 @@ pub(crate) use chat_composer::InputResult;
 use codex_protocol::custom_prompts::CustomPrompt;
 
 use crate::status_indicator_widget::StatusIndicatorWidget;
-pub(crate) use experimental_features_view::BetaFeatureItem;
+pub(crate) use experimental_features_view::ExperimentalFeatureItem;
 pub(crate) use experimental_features_view::ExperimentalFeaturesView;
 pub(crate) use list_selection_view::SelectionAction;
 pub(crate) use list_selection_view::SelectionItem;

codex-rs/tui/src/chatwidget.rs

@@ -133,12 +133,12 @@ use crate::app_event::WindowsSandboxEnableMode;
 use crate::app_event::WindowsSandboxFallbackReason;
 use crate::app_event_sender::AppEventSender;
 use crate::bottom_pane::ApprovalRequest;
-use crate::bottom_pane::BetaFeatureItem;
 use crate::bottom_pane::BottomPane;
 use crate::bottom_pane::BottomPaneParams;
 use crate::bottom_pane::CancellationEvent;
 use crate::bottom_pane::CollaborationModeIndicator;
 use crate::bottom_pane::DOUBLE_PRESS_QUIT_SHORTCUT_ENABLED;
+use crate::bottom_pane::ExperimentalFeatureItem;
 use crate::bottom_pane::ExperimentalFeaturesView;
 use crate::bottom_pane::InputResult;
 use crate::bottom_pane::LocalImageAttachment;
@@ -4029,12 +4029,12 @@ impl ChatWidget {
     }
 
     pub(crate) fn open_experimental_popup(&mut self) {
-        let features: Vec<BetaFeatureItem> = FEATURES
+        let features: Vec<ExperimentalFeatureItem> = FEATURES
             .iter()
             .filter_map(|spec| {
-                let name = spec.stage.beta_menu_name()?;
-                let description = spec.stage.beta_menu_description()?;
-                Some(BetaFeatureItem {
+                let name = spec.stage.experimental_menu_name()?;
+                let description = spec.stage.experimental_menu_description()?;
+                Some(ExperimentalFeatureItem {
                     feature: spec.id,
                     name: name.to_string(),
                     description: description.to_string(),

codex-rs/tui/src/chatwidget/snapshots/codex_tui__chatwidget__tests__experimental_features_popup.snap

@@ -3,7 +3,7 @@ source: tui/src/chatwidget/tests.rs
 expression: popup
 ---
   Experimental features
-  Toggle beta features. Changes are saved to config.toml.
+  Toggle experimental features. Changes are saved to config.toml.
 
 › [ ] Ghost snapshots  Capture undo snapshots each turn.
   [x] Shell tool       Allow the model to run shell commands.

codex-rs/tui/src/chatwidget/tests.rs

@@ -2911,13 +2911,13 @@ async fn experimental_features_popup_snapshot() {
     let (mut chat, _rx, _op_rx) = make_chatwidget_manual(None).await;
 
     let features = vec![
-        BetaFeatureItem {
+        ExperimentalFeatureItem {
             feature: Feature::GhostCommit,
             name: "Ghost snapshots".to_string(),
             description: "Capture undo snapshots each turn.".to_string(),
             enabled: false,
         },
-        BetaFeatureItem {
+        ExperimentalFeatureItem {
             feature: Feature::ShellTool,
             name: "Shell tool".to_string(),
             description: "Allow the model to run shell commands.".to_string(),
@@ -2937,7 +2937,7 @@ async fn experimental_features_toggle_saves_on_exit() {
 
     let expected_feature = Feature::GhostCommit;
     let view = ExperimentalFeaturesView::new(
-        vec![BetaFeatureItem {
+        vec![ExperimentalFeatureItem {
             feature: expected_feature,
             name: "Ghost snapshots".to_string(),
             description: "Capture undo snapshots each turn.".to_string(),

codex-rs/tui/src/slash_command.rs

@@ -67,7 +67,7 @@ impl SlashCommand {
             SlashCommand::Approvals => "choose what Codex can do without approval",
             SlashCommand::Permissions => "choose what Codex is allowed to do",
             SlashCommand::ElevateSandbox => "set up elevated agent sandbox",
-            SlashCommand::Experimental => "toggle beta features",
+            SlashCommand::Experimental => "toggle experimental features",
             SlashCommand::Mcp => "list configured MCP tools",
             SlashCommand::Logout => "log out of Codex",
             SlashCommand::Rollout => "print the rollout file path",

codex-rs/tui/src/tooltips.rs

@@ -15,15 +15,15 @@ lazy_static! {
     static ref ALL_TOOLTIPS: Vec<&'static str> = {
         let mut tips = Vec::new();
         tips.extend(TOOLTIPS.iter().copied());
-        tips.extend(beta_tooltips());
+        tips.extend(experimental_tooltips());
         tips
     };
 }
 
-fn beta_tooltips() -> Vec<&'static str> {
+fn experimental_tooltips() -> Vec<&'static str> {
     FEATURES
         .iter()
-        .filter_map(|spec| spec.stage.beta_announcement())
+        .filter_map(|spec| spec.stage.experimental_announcement())
         .collect()
 }