Initial commit

Signed-off-by: Ilan Bigio <ilan@openai.com>

codex-cli/tests/multiline-shift-enter-crlf.test.tsx

@@ -0,0 +1,51 @@
+// Regression test: Some terminals emit a carriage‑return ("\r") for
+// Shift+Enter instead of a bare line‑feed.  Pressing Shift+Enter in that
+// environment should insert a newline **without** triggering submission.
+
+import { renderTui } from "./ui-test-helpers.js";
+import MultilineTextEditor from "../src/components/chat/multiline-editor.js";
+import * as React from "react";
+import { describe, it, expect, vi } from "vitest";
+
+async function type(
+  stdin: NodeJS.WritableStream,
+  text: string,
+  flush: () => Promise<void>,
+) {
+  stdin.write(text);
+  await flush();
+}
+
+describe("MultilineTextEditor – Shift+Enter (\r variant)", () => {
+  it("inserts a newline and does NOT submit when the terminal sends \r for Shift+Enter", async () => {
+    const onSubmit = vi.fn();
+
+    const { stdin, lastFrameStripped, flush, cleanup } = renderTui(
+      React.createElement(MultilineTextEditor, {
+        height: 5,
+        width: 20,
+        initialText: "",
+        onSubmit,
+      }),
+    );
+
+    await flush();
+
+    // Type some text then press Shift+Enter (simulated by kitty CSI-u seq).
+    await type(stdin, "foo", flush);
+    await type(stdin, "\u001B[13;2u", flush); // ESC [ 13 ; 2 u
+    await type(stdin, "bar", flush);
+
+    const frame = lastFrameStripped();
+    expect(frame).toMatch(/foo/);
+    expect(frame).toMatch(/bar/);
+
+    // Must have inserted a newline (two rendered lines inside the frame)
+    expect(frame.split("\n").length).toBeGreaterThanOrEqual(2);
+
+    // No submission should have occurred
+    expect(onSubmit).not.toHaveBeenCalled();
+
+    cleanup();
+  });
+});