fix(ui): recognize ctrl+enter as newline in prompt input (#169)

packages/cli/src/tests/prompt-input-keys.test.ts

@@ -186,6 +186,17 @@ test("parseTerminalInput recognizes alternate shifted return sequences", () => {
   }
 });
 
+test("parseTerminalInput recognizes ctrl+enter modifyOtherKeys sequences as newline", () => {
+  for (const sequence of ["\u001B[13;5u", "\u001B[27;5;13~"]) {
+    const { input, key } = parseTerminalInput(sequence);
+    assert.equal(key.return, true);
+    assert.equal(key.ctrl, true);
+    assert.equal(key.shift, false);
+    assert.equal(getPromptReturnKeyAction(key), "newline");
+    assert.equal(input.startsWith("["), true);
+  }
+});
+
 test("terminal extended key helpers request and restore modifyOtherKeys mode", () => {
   assert.equal(enableTerminalExtendedKeys(), "\u001B[>4;1m");
   assert.equal(disableTerminalExtendedKeys(), "\u001B[>4;0m");

packages/cli/src/ui/hooks/useTerminalInput.ts

@@ -30,6 +30,8 @@ const HOME_SEQUENCES = new Set(["\u001B[H", "\u001B[1~", "\u001B[7~", "\u001BOH"
 const END_SEQUENCES = new Set(["\u001B[F", "\u001B[4~", "\u001B[8~", "\u001BOF"]);
 const SHIFT_RETURN_SEQUENCES = new Set(["\u001B\r", "\u001B[13;2u", "\u001B[13;2~", "\u001B[27;2;13~"]);
 const META_RETURN_SEQUENCES = new Set(["\u001B[13;3u", "\u001B[13;4u"]);
+// Ctrl+Enter in modifyOtherKeys mode: keycode 13 (Enter), modifier 5 (Ctrl).
+const CTRL_RETURN_SEQUENCES = new Set(["\u001B[13;5u", "\u001B[27;5;13~"]);
 const CTRL_LEFT_SEQUENCES = new Set(["\u001B[1;5D", "\u001B[5D"]);
 const CTRL_RIGHT_SEQUENCES = new Set(["\u001B[1;5C", "\u001B[5C"]);
 const META_LEFT_SEQUENCES = new Set(["\u001B[1;3D", "\u001B[3D", "\u001Bb"]);
@@ -124,9 +126,13 @@ export function parseTerminalInput(data: Buffer | string): { input: string; key:
     end: END_SEQUENCES.has(raw),
     pageDown: raw === "\u001B[6~",
     pageUp: raw === "\u001B[5~",
-    return: raw === "\r" || SHIFT_RETURN_SEQUENCES.has(raw) || META_RETURN_SEQUENCES.has(raw),
+    return:
+      raw === "\r" ||
+      SHIFT_RETURN_SEQUENCES.has(raw) ||
+      META_RETURN_SEQUENCES.has(raw) ||
+      CTRL_RETURN_SEQUENCES.has(raw),
     escape: raw === "\u001B",
-    ctrl: CTRL_LEFT_SEQUENCES.has(raw) || CTRL_RIGHT_SEQUENCES.has(raw),
+    ctrl: CTRL_LEFT_SEQUENCES.has(raw) || CTRL_RIGHT_SEQUENCES.has(raw) || CTRL_RETURN_SEQUENCES.has(raw),
     shift: SHIFT_RETURN_SEQUENCES.has(raw),
     tab: raw === "\t" || raw === "\u001B[Z",
     backspace: BACKSPACE_BYTES.has(raw),

packages/cli/src/ui/views/PromptInput.tsx

@@ -212,7 +212,7 @@ export const PromptInput = React.memo(function PromptInput({
     ? statusMessage
     : busy
       ? busyStatusText
-      : `enter send · shift+enter newline · @ files · ctrl+v image · / commands · ctrl+d exit${processOrPasteHint}`;
+      : `enter send · shift+enter/ctrl+enter newline · @ files · ctrl+v image · / commands · ctrl+d exit${processOrPasteHint}`;
   const showFooterText = useMemo(
     () => showMenu || showSkillsDropdown || openRawModelDropdown || showModelDropdown || showFileMentionMenu,
     [showMenu, showSkillsDropdown, showModelDropdown, openRawModelDropdown, showFileMentionMenu]
@@ -968,11 +968,13 @@ export function isRawModeShortcut(input: string, key: Pick<InputKey, "ctrl">): b
 
 export type PromptReturnKeyAction = "submit" | "newline" | null;
 
-export function getPromptReturnKeyAction(key: Pick<InputKey, "return" | "shift" | "meta">): PromptReturnKeyAction {
+export function getPromptReturnKeyAction(
+  key: Pick<InputKey, "return" | "shift" | "meta" | "ctrl">
+): PromptReturnKeyAction {
   if (!key.return) {
     return null;
   }
-  if (key.shift || key.meta) {
+  if (key.shift || key.meta || key.ctrl) {
     return "newline";
   }
   return "submit";