diff --git a/clients/terminal/tui/widgets/input_box.py b/clients/terminal/tui/widgets/input_box.py
index 2c1fe7f..11d5e6f 100644
--- a/clients/terminal/tui/widgets/input_box.py
+++ b/clients/terminal/tui/widgets/input_box.py
@@ -1,9 +1,14 @@
 """Input box widget for the TUI.
 
-A multi-line prompt: ``Enter`` sends the message, ``Ctrl+Enter`` inserts a hard
-line break, and long lines soft-wrap visually (``TextArea`` defaults to
-``soft_wrap=True``). The field grows with content up to ``max-height`` and then
-scrolls internally.
+A multi-line prompt: ``Enter`` sends the message and long lines soft-wrap
+visually (``TextArea`` defaults to ``soft_wrap=True``). The field grows with
+content up to ``max-height`` and then scrolls internally.
+
+A hard line break cannot be inserted via a modifier+Enter combo because the
+common terminals do not distinguish Ctrl/Alt/Shift+Enter from plain Enter (they
+all send ``\\r``), so any such binding would collide with the submit key. Soft
+wrap covers the visual multiline case; revisit if a distinguishable newline key
+is needed.
 """
 
 from __future__ import annotations
@@ -17,7 +22,7 @@
 
 
 class _PromptInput(TextArea):
-    """Multi-line text area that submits on Enter and breaks on Ctrl+Enter."""
+    """Multi-line text area that submits on Enter."""
 
     async def _on_key(self, event: events.Key) -> None:
         # Intercept before TextArea's own _on_key, which maps "enter" -> "\n".
@@ -26,11 +31,6 @@
             event.prevent_default()
             self.action_submit()
             return
-        if event.key == "ctrl+enter":
-            event.stop()
-            event.prevent_default()
-            self.insert("\n")
-            return
         await super()._on_key(event)
 
     def action_submit(self) -> None:
@@ -72,7 +72,7 @@
         super().__init__()
         self._input = _PromptInput(
             text="",
-            placeholder="Ask anything... (Enter to send, Ctrl+Enter for a new line)",
+            placeholder="Ask anything... (Enter to send)",
             classes="input-field",
             show_line_numbers=False,
             soft_wrap=True,
diff --git a/tests/clients/test_tui_app.py b/tests/clients/test_tui_app.py
index 8e9fdb7..10e42fd 100644
--- a/tests/clients/test_tui_app.py
+++ b/tests/clients/test_tui_app.py
@@ -98,25 +98,6 @@
 
 
 @pytest.mark.anyio
-async def test_ctrl_enter_inserts_newline_without_submitting() -> None:
-    """Ctrl+Enter inserts a hard line break; Enter is what submits."""
-    async with NaviCodeTui(new_session=True).run_test() as pilot:
-        await pilot.pause()
-        input_box = pilot.app.query_one("InputBox")
-        input_box._input.focus()
-        await pilot.press("h", "i")
-        await pilot.press("ctrl+enter")
-        await pilot.press("t", "h", "e", "r", "e")
-        await pilot.pause()
-        # A newline was inserted, not submitted.
-        assert input_box._input.text == "hi\nthere"
-        chat = pilot.app.query_one("ChatPanel")
-        assert not any(
-            item.kind == "user_message" for item in chat._model.items
-        )
-
-
-@pytest.mark.anyio
 async def test_enter_submits_multiline_text() -> None:
     """Enter submits the full multi-line buffer (newlines preserved)."""
     async with NaviCodeTui(new_session=True).run_test() as pilot: