From 378c34bd43eb4c9779ce1f7ff5dea376b34c91c5 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 19 Feb 2026 16:50:17 +0000
Subject: [PATCH 1/2] Initial plan


From f07a3fc5f5f4d5bfc0152cca4b103369934cd8b6 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Thu, 19 Feb 2026 16:53:24 +0000
Subject: [PATCH 2/2] Add regression tests for VS16 after zero-width chars in
 split_graphemes

Co-authored-by: willmcgugan <554369+willmcgugan@users.noreply.github.com>
---
 tests/test_cells.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tests/test_cells.py b/tests/test_cells.py
index 5aefda524c..c307fa5ac7 100644
--- a/tests/test_cells.py
+++ b/tests/test_cells.py
@@ -209,6 +209,16 @@ def test_is_single_cell_widths() -> None:
             [(0, 2, 0)],
             0,
         ),  # Two ZWJs should have zero width
+        (
+            "\x1b\ufe0f",
+            [(0, 2, 0)],
+            0,
+        ),  # VS16 after escape (zero-width, doesn't set last_measured_character) should have zero width
+        (
+            "\u200d\ufe0f",
+            [(0, 2, 0)],
+            0,
+        ),  # VS16 after ZWJ (zero-width, doesn't set last_measured_character) should have zero width
     ],
 )
 def test_split_graphemes(