Auto compact at ~90% (#5292)

Users now hit a window exceeded limit and they usually don't know what
to do. This starts auto compact at ~90% of the window.

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

@@ -108,7 +108,7 @@ pub(crate) struct ChatComposer {
     custom_prompts: Vec<CustomPrompt>,
     footer_mode: FooterMode,
     footer_hint_override: Option<Vec<(String, String)>>,
-    context_window_percent: Option<u8>,
+    context_window_percent: Option<i64>,
 }
 
 /// Popup state – at most one can be visible at any time.
@@ -1511,7 +1511,7 @@ impl ChatComposer {
         self.is_task_running = running;
     }
 
-    pub(crate) fn set_context_window_percent(&mut self, percent: Option<u8>) {
+    pub(crate) fn set_context_window_percent(&mut self, percent: Option<i64>) {
         if self.context_window_percent != percent {
             self.context_window_percent = percent;
         }

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

@@ -17,7 +17,7 @@ pub(crate) struct FooterProps {
     pub(crate) esc_backtrack_hint: bool,
     pub(crate) use_shift_enter_hint: bool,
     pub(crate) is_task_running: bool,
-    pub(crate) context_window_percent: Option<u8>,
+    pub(crate) context_window_percent: Option<i64>,
 }
 
 #[derive(Clone, Copy, Debug, Eq, PartialEq)]
@@ -221,8 +221,8 @@ fn build_columns(entries: Vec<Line<'static>>) -> Vec<Line<'static>> {
         .collect()
 }
 
-fn context_window_line(percent: Option<u8>) -> Line<'static> {
-    let percent = percent.unwrap_or(100);
+fn context_window_line(percent: Option<i64>) -> Line<'static> {
+    let percent = percent.unwrap_or(100).clamp(0, 100);
     Line::from(vec![Span::from(format!("{percent}% context left")).dim()])
 }
 

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

@@ -70,7 +70,7 @@ pub(crate) struct BottomPane {
     status: Option<StatusIndicatorWidget>,
     /// Queued user messages to show under the status indicator.
     queued_user_messages: Vec<String>,
-    context_window_percent: Option<u8>,
+    context_window_percent: Option<i64>,
 }
 
 pub(crate) struct BottomPaneParams {
@@ -357,7 +357,7 @@ impl BottomPane {
         }
     }
 
-    pub(crate) fn set_context_window_percent(&mut self, percent: Option<u8>) {
+    pub(crate) fn set_context_window_percent(&mut self, percent: Option<i64>) {
         if self.context_window_percent == percent {
             return;
         }

codex-rs/tui/src/chatwidget.rs

@@ -142,9 +142,9 @@ impl RateLimitWarningState {
     fn take_warnings(
         &mut self,
         secondary_used_percent: Option<f64>,
-        secondary_window_minutes: Option<u64>,
+        secondary_window_minutes: Option<i64>,
         primary_used_percent: Option<f64>,
-        primary_window_minutes: Option<u64>,
+        primary_window_minutes: Option<i64>,
     ) -> Vec<String> {
         let reached_secondary_cap =
             matches!(secondary_used_percent, Some(percent) if percent == 100.0);
@@ -195,12 +195,14 @@ impl RateLimitWarningState {
     }
 }
 
-pub(crate) fn get_limits_duration(windows_minutes: u64) -> String {
-    const MINUTES_PER_HOUR: u64 = 60;
-    const MINUTES_PER_DAY: u64 = 24 * MINUTES_PER_HOUR;
-    const MINUTES_PER_WEEK: u64 = 7 * MINUTES_PER_DAY;
-    const MINUTES_PER_MONTH: u64 = 30 * MINUTES_PER_DAY;
-    const ROUNDING_BIAS_MINUTES: u64 = 3;
+pub(crate) fn get_limits_duration(windows_minutes: i64) -> String {
+    const MINUTES_PER_HOUR: i64 = 60;
+    const MINUTES_PER_DAY: i64 = 24 * MINUTES_PER_HOUR;
+    const MINUTES_PER_WEEK: i64 = 7 * MINUTES_PER_DAY;
+    const MINUTES_PER_MONTH: i64 = 30 * MINUTES_PER_DAY;
+    const ROUNDING_BIAS_MINUTES: i64 = 3;
+
+    let windows_minutes = windows_minutes.max(0);
 
     if windows_minutes <= MINUTES_PER_DAY.saturating_add(ROUNDING_BIAS_MINUTES) {
         let adjusted = windows_minutes.saturating_add(ROUNDING_BIAS_MINUTES);

codex-rs/tui/src/status/card.rs

@@ -31,16 +31,16 @@ use super::rate_limits::render_status_limit_progress_bar;
 
 #[derive(Debug, Clone)]
 struct StatusContextWindowData {
-    percent_remaining: u8,
-    tokens_in_context: u64,
-    window: u64,
+    percent_remaining: i64,
+    tokens_in_context: i64,
+    window: i64,
 }
 
 #[derive(Debug, Clone)]
 pub(crate) struct StatusTokenUsageData {
-    total: u64,
-    input: u64,
-    output: u64,
+    total: i64,
+    input: i64,
+    output: i64,
     context_window: Option<StatusContextWindowData>,
 }
 

codex-rs/tui/src/status/helpers.rs

@@ -103,7 +103,8 @@ pub(crate) fn compose_account_display(config: &Config) -> Option<StatusAccountDi
     None
 }
 
-pub(crate) fn format_tokens_compact(value: u64) -> String {
+pub(crate) fn format_tokens_compact(value: i64) -> String {
+    let value = value.max(0);
     if value == 0 {
         return "0".to_string();
     }
@@ -111,14 +112,15 @@ pub(crate) fn format_tokens_compact(value: u64) -> String {
         return value.to_string();
     }
 
+    let value_f64 = value as f64;
     let (scaled, suffix) = if value >= 1_000_000_000_000 {
-        (value as f64 / 1_000_000_000_000.0, "T")
+        (value_f64 / 1_000_000_000_000.0, "T")
     } else if value >= 1_000_000_000 {
-        (value as f64 / 1_000_000_000.0, "B")
+        (value_f64 / 1_000_000_000.0, "B")
     } else if value >= 1_000_000 {
-        (value as f64 / 1_000_000.0, "M")
+        (value_f64 / 1_000_000.0, "M")
     } else {
-        (value as f64 / 1_000.0, "K")
+        (value_f64 / 1_000.0, "K")
     };
 
     let decimals = if scaled < 10.0 {

codex-rs/tui/src/status/rate_limits.rs

@@ -27,7 +27,7 @@ pub(crate) enum StatusRateLimitData {
 pub(crate) struct RateLimitWindowDisplay {
     pub used_percent: f64,
     pub resets_at: Option<String>,
-    pub window_minutes: Option<u64>,
+    pub window_minutes: Option<i64>,
 }
 
 impl RateLimitWindowDisplay {