From f6015a7e6e9e3482f4ebf615ec87daf1999eb04e Mon Sep 17 00:00:00 2001
From: Harrison Booth <73434116+Harrison-Booth@users.noreply.github.com>
Date: Tue, 27 Oct 2026 21:21:04 -0500
Subject: [PATCH] Pin COPILOT as written without an _xlfn. prefix

---
 crates/xlsx/src/tables.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/crates/xlsx/src/tables.rs b/crates/xlsx/src/tables.rs
index 361a79483..dd9e31b5e 100644
--- a/crates/xlsx/src/tables.rs
+++ b/crates/xlsx/src/tables.rs
@@ -359,6 +359,8 @@ mod tests {
         // Excel writes these two without a prefix.
         assert_eq!(file_function_name("NETWORKDAYS.INTL"), None);
         assert_eq!(file_function_name("WORKDAY.INTL"), None);
+        // Excel 16.0 build 20527 saves COPILOT as plain `COPILOT(...)` (it does not know the name yet).
+        assert_eq!(file_function_name("COPILOT"), None);
         assert_eq!(file_function_name("SUM"), None);
         assert_eq!(builtin_format(14), Some("m/d/yyyy"));
         assert_eq!(builtin_id("0.00%"), Some(10));