Restore pending large-paste payloads on Ctrl+C history recall

codex-rs/protocol/src/user_input.rs

@@ -38,6 +38,10 @@ pub struct TextElement {
     /// Byte range in the parent `text` buffer that this element occupies.
     pub byte_range: ByteRange,
     /// Optional human-readable placeholder for the element, displayed in the UI.
+    ///
+    /// Placeholders are unique within a single composer buffer. This includes both generic
+    /// text element placeholders (like large paste markers) and image attachment placeholders,
+    /// enabling exact matching between elements and their backing payloads.
     placeholder: Option<String>,
 }
 

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

@@ -21,9 +21,10 @@
 //! The Up/Down history path is managed by [`ChatComposerHistory`]. It merges:
 //!
 //! - Persistent cross-session history (text-only; no element ranges or attachments).
-//! - Local in-session history (full text + text elements + local image paths).
+//! - Local in-session history (full text + text elements + local image paths + pending pastes).
 //!
-//! When recalling a local entry, the composer rehydrates text elements and image attachments.
+//! When recalling a local entry, the composer rehydrates text elements, pending pastes, and image
+//! attachments.
 //! When recalling a persistent entry, only the text is restored.
 //!
 //! # Submission and Prompt Expansion
@@ -539,13 +540,9 @@ impl ChatComposer {
             return false;
         };
         // Persistent ↑/↓ history is text-only (backwards-compatible and avoids persisting
-        // attachments), but local in-session ↑/↓ history can rehydrate elements and image paths.
-        self.set_text_content_with_mention_bindings(
-            entry.text,
-            entry.text_elements,
-            entry.local_image_paths,
-            entry.mention_bindings,
-        );
+        // attachments), but local in-session ↑/↓ history can rehydrate elements, image paths,
+        // mention bindings, and pending large-paste payloads.
+        self.restore_history_entry(entry);
         true
     }
 
@@ -815,6 +812,16 @@ impl ChatComposer {
         self.sync_popups();
     }
 
+    fn restore_history_entry(&mut self, entry: HistoryEntry) {
+        self.set_text_content_with_mention_bindings(
+            entry.text,
+            entry.text_elements,
+            entry.local_image_paths,
+            entry.mention_bindings,
+        );
+        self.pending_pastes = entry.pending_pastes;
+    }
+
     /// Update the placeholder text without changing input enablement.
     pub(crate) fn set_placeholder_text(&mut self, placeholder: String) {
         self.placeholder_text = placeholder;
@@ -832,6 +839,7 @@ impl ChatComposer {
         }
         let previous = self.current_text();
         let text_elements = self.textarea.text_elements();
+        let pending_pastes = self.pending_pastes.clone();
         let local_image_paths = self
             .attached_images
             .iter()
@@ -845,6 +853,7 @@ impl ChatComposer {
             text_elements,
             local_image_paths,
             mention_bindings,
+            pending_pastes,
         });
         Some(previous)
     }
@@ -2065,6 +2074,7 @@ impl ChatComposer {
                 text_elements: text_elements.clone(),
                 local_image_paths,
                 mention_bindings: original_mention_bindings,
+                pending_pastes: Vec::new(),
             });
         }
         self.pending_pastes.clear();
@@ -2352,12 +2362,7 @@ impl ChatComposer {
                         _ => unreachable!(),
                     };
                     if let Some(entry) = replace_entry {
-                        self.set_text_content_with_mention_bindings(
-                            entry.text,
-                            entry.text_elements,
-                            entry.local_image_paths,
-                            entry.mention_bindings,
-                        );
+                        self.restore_history_entry(entry);
                         return (InputResult::None, true);
                     }
                 }
@@ -5727,6 +5732,55 @@ mod tests {
         assert_eq!(composer.local_image_paths(), vec![path]);
     }
 
+    #[test]
+    fn history_navigation_restores_large_paste_payloads_after_ctrl_c() {
+        let (tx, _rx) = unbounded_channel::<AppEvent>();
+        let sender = AppEventSender::new(tx);
+        let mut composer = ChatComposer::new(
+            true,
+            sender,
+            false,
+            "Ask Codex to do anything".to_string(),
+            false,
+        );
+        composer.set_steer_enabled(true);
+
+        let large = "x".repeat(LARGE_PASTE_CHAR_THRESHOLD + 5);
+        composer.handle_paste(large.clone());
+        assert_eq!(composer.pending_pastes.len(), 1);
+        let placeholder = composer.pending_pastes[0].0.clone();
+        assert_eq!(composer.current_text(), placeholder);
+
+        composer.clear_for_ctrl_c();
+        assert!(composer.is_empty());
+
+        let _ = composer.handle_key_event(KeyEvent::new(KeyCode::Up, KeyModifiers::NONE));
+
+        let text = composer.current_text();
+        assert_eq!(text, placeholder);
+        let text_elements = composer.text_elements();
+        assert_eq!(text_elements.len(), 1);
+        assert_eq!(
+            text_elements[0].placeholder(&text),
+            Some(placeholder.as_str())
+        );
+        assert_eq!(composer.pending_pastes.len(), 1);
+        assert_eq!(composer.pending_pastes[0].1, large);
+
+        let (result, _needs_redraw) =
+            composer.handle_key_event(KeyEvent::new(KeyCode::Enter, KeyModifiers::NONE));
+        match result {
+            InputResult::Submitted {
+                text,
+                text_elements,
+            } => {
+                assert_eq!(text, large);
+                assert!(text_elements.is_empty());
+            }
+            _ => panic!("expected Submitted"),
+        }
+    }
+
     #[test]
     fn set_text_content_reattaches_images_without_placeholder_metadata() {
         let (tx, _rx) = unbounded_channel::<AppEvent>();

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

@@ -14,6 +14,7 @@ pub(crate) struct HistoryEntry {
     pub(crate) text_elements: Vec<TextElement>,
     pub(crate) local_image_paths: Vec<PathBuf>,
     pub(crate) mention_bindings: Vec<MentionBinding>,
+    pub(crate) pending_pastes: Vec<(String, String)>,
 }
 
 impl HistoryEntry {
@@ -23,6 +24,7 @@ impl HistoryEntry {
             text_elements: Vec::new(),
             local_image_paths: Vec::new(),
             mention_bindings: Vec::new(),
+            pending_pastes: Vec::new(),
         }
     }
 
@@ -40,6 +42,7 @@ impl HistoryEntry {
                     path: mention.path,
                 })
                 .collect(),
+            pending_pastes: Vec::new(),
         }
     }
 }
@@ -95,7 +98,10 @@ impl ChatComposerHistory {
     /// Record a message submitted by the user in the current session so it can
     /// be recalled later.
     pub fn record_local_submission(&mut self, entry: HistoryEntry) {
-        if entry.text.is_empty() && entry.local_image_paths.is_empty() {
+        if entry.text.is_empty()
+            && entry.local_image_paths.is_empty()
+            && entry.pending_pastes.is_empty()
+        {
             return;
         }
 

docs/tui-chat-composer.md

@@ -51,18 +51,21 @@ The solution is to detect paste-like _bursts_ and buffer them into a single expl
 - When a slash command name is completed and the user types a space, the `/command` token is
   promoted into a text element so it renders distinctly and edits atomically.
 
-### History navigation (↑/↓)
+## History navigation (↑/↓)
 
-Up/Down recall is handled by `ChatComposerHistory` and merges two sources:
+`ChatComposerHistory` merges two sources:
 
-- **Persistent history** (cross-session, fetched from `~/.codex/history.jsonl`): text-only. It
-  does **not** carry text element ranges or local image attachments, so recalling one of these
-  entries only restores the text.
-- **Local history** (current session): stores the full submission payload, including text
-  elements and local image paths. Recalling a local entry rehydrates placeholders and attachments.
+- **Persistent history** (cross-session): text-only entries read from the history log. These do not
+  include text elements, local image paths, or pending large-paste payloads so the on-disk format
+  stays backwards-compatible.
+- **Local history** (in-session): full composer snapshots captured during the current session
+  (submitted messages and Ctrl+C-cleared drafts).
 
-This distinction keeps the on-disk history backward compatible and avoids persisting attachments,
-while still providing a richer recall experience for in-session edits.
+When recalling a local entry, the composer restores:
+
+- text elements (so placeholders render as styled elements),
+- local image attachments (by matching placeholders),
+- pending large-paste payloads (so placeholders still expand on submit).
 
 ## Config gating for reuse
 
@@ -91,7 +94,6 @@ Key effects when disabled:
 Built-in slash command availability is centralized in
 `codex-rs/tui/src/bottom_pane/slash_commands.rs` and reused by both the composer and the command
 popup so gating stays in sync.
-
 ## Submission flow (Enter/Tab)
 
 There are multiple submission paths, but they share the same core rules:
@@ -101,6 +103,9 @@ There are multiple submission paths, but they share the same core rules:
 `handle_submission` calls `prepare_submission_text` for both submit and queue. That method:
 
 1. Expands any pending paste placeholders so element ranges align with the final text.
+   - Placeholder text is unique within a composer buffer. Both large paste markers and image
+     attachment placeholders are suffixed as needed (`#2`, `#3`, …), so payloads can match
+     elements exactly by placeholder text.
 2. Trims whitespace and rebases element ranges to the trimmed buffer.
 3. Expands `/prompts:` custom prompts:
    - Named args use key=value parsing.