Remove the Plan mode composer nudge (#40200)

## What changed

- Keep the normal composer footer visible when a draft contains the word `plan`.
- Remove the contextual “Create a plan?” prompt, its Escape dismissal behavior, and its per-thread dismissal state.

## Testing

- Update wide and narrow composer snapshots to cover the standard footer for plan-related drafts.

GitOrigin-RevId: 1a3c8cfce9d4effa2149790975133f652aa7c914

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

@@ -556,19 +556,6 @@ pub(crate) struct ComposerDraftSnapshot {
 
 const FOOTER_SPACING_HEIGHT: u16 = 0;
 
-/// Builds the one-line nudge that replaces the ambient footer without adding layout height.
-fn plan_mode_nudge_line() -> Line<'static> {
-    Line::from(vec![
-        "Create a plan?".magenta(),
-        "  ".into(),
-        key_hint::shift(KeyCode::Tab).into(),
-        " use Plan mode".into(),
-        "   ".into(),
-        key_hint::plain(KeyCode::Esc).into(),
-        " dismiss".into(),
-    ])
-}
-
 impl ChatComposer {
     fn slash_input(&self) -> SlashInput<'_> {
         SlashInput::new(
@@ -639,7 +626,6 @@ impl ChatComposer {
                 use_shift_enter_hint,
                 mode: FooterMode::ComposerEmpty,
                 hint_override: None,
-                plan_mode_nudge_visible: false,
                 flash: None,
                 context_window_percent: None,
                 context_window_used_tokens: None,
@@ -746,7 +732,6 @@ impl ChatComposer {
             self.effort_ignition = Some(EffortIgnition::new(tier, style));
             self.effort_animation_style = Some(style);
             if self.footer.status_line_enabled
-                && !self.footer.plan_mode_nudge_visible
                 && let Some(previous) = passive_footer_status_line(&self.footer_props())
             {
                 self.effort_status_line_transition =
@@ -1440,23 +1425,6 @@ impl ChatComposer {
         self.footer.hint_override = items;
     }
 
-    /// Updates whether the Plan-mode nudge replaces the ambient footer row.
-    ///
-    /// Returns `true` only when the rendered footer can change so callers can avoid scheduling
-    /// redundant redraws while reevaluating nudge policy on routine composer updates.
-    pub(crate) fn set_plan_mode_nudge_visible(&mut self, visible: bool) -> bool {
-        if self.footer.plan_mode_nudge_visible == visible {
-            return false;
-        }
-        self.footer.plan_mode_nudge_visible = visible;
-        true
-    }
-
-    #[cfg(test)]
-    pub(crate) fn plan_mode_nudge_visible(&self) -> bool {
-        self.footer.plan_mode_nudge_visible
-    }
-
     pub(crate) fn set_remote_image_urls(&mut self, urls: Vec<String>) {
         self.attachments
             .set_remote_image_urls(urls, &mut self.draft.textarea);
@@ -4275,7 +4243,6 @@ impl ChatComposer {
         self.footer.quit_shortcut_expires_at = None;
         self.footer.mode = FooterMode::ComposerEmpty;
         self.footer.hint_override = Some(Vec::new());
-        self.footer.plan_mode_nudge_visible = false;
         self.footer.flash = None;
     }
 
@@ -4596,17 +4563,6 @@ impl ChatComposer {
                 };
                 if let Some(line) = self.history_search_footer_line() {
                     render_footer_line(hint_rect, buf, line);
-                } else if self.footer.plan_mode_nudge_visible {
-                    let available_width =
-                        hint_rect.width.saturating_sub(FOOTER_INDENT_COLS as u16) as usize;
-                    render_footer_line(
-                        hint_rect,
-                        buf,
-                        truncate_line_with_ellipsis_if_overflow(
-                            plan_mode_nudge_line(),
-                            available_width,
-                        ),
-                    );
                 } else {
                     let available_width =
                         hint_rect.width.saturating_sub(FOOTER_INDENT_COLS as u16) as usize;

codex-rs/tui/src/bottom_pane/chat_composer/footer_state.rs

@@ -19,7 +19,6 @@ pub(super) struct FooterState {
     pub(super) use_shift_enter_hint: bool,
     pub(super) mode: FooterMode,
     pub(super) hint_override: Option<Vec<(String, String)>>,
-    pub(super) plan_mode_nudge_visible: bool,
     pub(super) flash: Option<FooterFlash>,
     pub(super) context_window_percent: Option<i64>,
     pub(super) context_window_used_tokens: Option<i64>,

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

@@ -59,25 +59,6 @@ fn effort_transition_does_not_queue_a_missing_outgoing_status_line() {
     assert!(composer.effort_status_line_transition.is_none());
 }
 
-#[test]
-fn effort_transition_does_not_queue_while_plan_mode_nudge_is_visible() {
-    let (mut composer, _rx) = new_test_composer();
-    composer.set_status_line_enabled(/*enabled*/ true);
-    composer.set_status_line(Some(Line::from("gpt-5.4 high · main")));
-    composer.set_plan_mode_nudge_visible(/*visible*/ true);
-    composer.set_active_reasoning_effort(
-        Some(&ReasoningEffort::High),
-        /*animations_enabled*/ true,
-    );
-
-    assert!(composer.set_active_reasoning_effort(
-        Some(&ReasoningEffort::Ultra),
-        /*animations_enabled*/ true,
-    ));
-    assert!(composer.effort_ignition.is_some());
-    assert!(composer.effort_status_line_transition.is_none());
-}
-
 #[test]
 fn effort_composer_restored_baseline_and_reduced_motion_do_not_start() {
     let (mut composer, _rx) = new_test_composer();

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

@@ -933,18 +933,6 @@ impl BottomPane {
         self.request_redraw();
     }
 
-    /// Applies the externally decided Plan-mode nudge visibility to the footer presentation.
-    pub(crate) fn set_plan_mode_nudge_visible(&mut self, visible: bool) {
-        if self.composer.set_plan_mode_nudge_visible(visible) {
-            self.request_redraw();
-        }
-    }
-
-    #[cfg(test)]
-    pub(crate) fn plan_mode_nudge_visible(&self) -> bool {
-        self.composer.plan_mode_nudge_visible()
-    }
-
     pub(crate) fn set_remote_image_urls(&mut self, urls: Vec<String>) {
         self.composer.set_remote_image_urls(urls);
         self.request_redraw();