fix: remove BOM/SIG from *.rc files

.github/copilot-instructions.md

@@ -188,6 +188,9 @@ No native ARM64 grepWin build exists. The ARM64 build uses `grepWin-x64_portable
 
 - **Formatting**: LLVM-based `.clang-format` in `src\` — 4-space indentation, Stroustrup brace style, left-aligned pointers, no column limit, no include sorting
 - **Editor config**: `.editorconfig` enforces UTF-8/CRLF for source files, 4-space indentation for C/C++; Lexilla code uses tabs (preserved from upstream)
+- **File encoding rules** (must be respected when creating or editing these files):
+  - `language\*\*.rc` — **UTF-8 without BOM**. Never write or save these files with a UTF-8 BOM. Use `Build\rc_to_utf8.cmd` to strip accidental BOMs.
+  - `Build\Notepad3.ini`, `Build\minipath.ini` — **UTF-8 with BOM** (BOM = `EF BB BF`). These INI reference files must retain the BOM.
 - **String safety**: Uses `strsafe.h` throughout; deprecated string functions are disabled
 
 ### Type conventions

Build/rc_to_utf8.cmd

@@ -0,0 +1,5 @@
+@echo off
+REM Convert UTF-8-BOM encoded language RC files to pure UTF-8 (no BOM)
+REM Usage: rc_to_utf8.cmd
+
+powershell -ExecutionPolicy Bypass -File "%~dp0scripts\rc_to_utf8.ps1"

Build/scripts/rc_to_utf8.ps1

@@ -0,0 +1,34 @@
+# Convert UTF-8-BOM encoded language RC files to pure UTF-8 (no BOM)
+# Usage: .\rc_to_utf8.ps1
+
+$ErrorActionPreference = "Stop"
+$ScriptDir  = Split-Path -Parent $MyInvocation.MyCommand.Path
+$RepoRoot   = Split-Path -Parent (Split-Path -Parent $ScriptDir)
+$LangDir    = Join-Path $RepoRoot "language"
+
+Write-Host "Stripping UTF-8 BOM from RC files in: $LangDir" -ForegroundColor Yellow
+
+$bom       = [byte[]](0xEF, 0xBB, 0xBF)
+$converted = 0
+$skipped   = 0
+
+Get-ChildItem -Path $LangDir -Filter "*.rc" -Recurse | ForEach-Object {
+    $bytes = [System.IO.File]::ReadAllBytes($_.FullName)
+    if ($bytes.Length -ge 3 -and $bytes[0] -eq $bom[0] -and $bytes[1] -eq $bom[1] -and $bytes[2] -eq $bom[2]) {
+        $stripped = $bytes[3..($bytes.Length - 1)]
+        [System.IO.File]::WriteAllBytes($_.FullName, $stripped)
+        Write-Host "  Converted: $($_.FullName.Substring($LangDir.Length + 1))" -ForegroundColor Cyan
+        $converted++
+    }
+    else {
+        $skipped++
+    }
+}
+
+Write-Host ""
+if ($converted -gt 0) {
+    Write-Host "Done! Converted $converted file(s), skipped $skipped file(s) (no BOM)." -ForegroundColor Green
+}
+else {
+    Write-Host "Done! No files needed conversion ($skipped file(s) already BOM-free)." -ForegroundColor Green
+}

CLAUDE.md

@@ -273,6 +273,9 @@ No native ARM64 grepWin build exists. The ARM64 build uses `grepWin-x64_portable
 
 - LLVM-based `.clang-format` in `src\` — 4-space indentation, Stroustrup brace style, left-aligned pointers, no column limit, no include sorting
 - `.editorconfig` enforces UTF-8/CRLF for source, 4-space indent for C/C++; Lexilla code uses tabs (preserved from upstream)
+- **File encoding rules** (must be respected when creating or editing these files):
+  - `language\*\*.rc` — **UTF-8 without BOM**. Never write or save these files with a UTF-8 BOM. Use `Build\rc_to_utf8.cmd` to strip accidental BOMs.
+  - `Build\Notepad3.ini`, `Build\minipath.ini` — **UTF-8 with BOM** (BOM = `EF BB BF`). These INI reference files must retain the BOM.
 - String safety via `strsafe.h` throughout; deprecated string functions are disabled
 
 ### Type Conventions

language/np3_af_za/lexer_af_za.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_af_za/menu_af_za.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_be_by/lexer_be_by.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_be_by/menu_be_by.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_de_de/lexer_de_de.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_de_de/menu_de_de.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_el_gr/lexer_el_gr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_el_gr/menu_el_gr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_en_gb/lexer_en_gb.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_en_gb/menu_en_gb.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_en_us/menu_en_us.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_es_es/lexer_es_es.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_es_es/menu_es_es.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_fi_fi/lexer_fi_fi.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_fi_fi/menu_fi_fi.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_fr_fr/lexer_fr_fr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_fr_fr/menu_fr_fr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_hi_in/lexer_hi_in.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_hi_in/menu_hi_in.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_hu_hu/lexer_hu_hu.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_hu_hu/menu_hu_hu.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_id_id/lexer_id_id.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_id_id/menu_id_id.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_it_it/lexer_it_it.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_it_it/menu_it_it.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_ja_jp/lexer_ja_jp.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_ja_jp/menu_ja_jp.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_ko_kr/lexer_ko_kr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_ko_kr/menu_ko_kr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_nl_nl/lexer_nl_nl.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_nl_nl/menu_nl_nl.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_pl_pl/lexer_pl_pl.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_pl_pl/menu_pl_pl.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_pt_br/lexer_pt_br.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_pt_br/menu_pt_br.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_pt_pt/lexer_pt_pt.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_pt_pt/menu_pt_pt.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_ru_ru/lexer_ru_ru.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_ru_ru/menu_ru_ru.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_sk_sk/lexer_sk_sk.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_sk_sk/menu_sk_sk.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_sv_se/lexer_sv_se.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_sv_se/menu_sv_se.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_tr_tr/lexer_tr_tr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_tr_tr/menu_tr_tr.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_vi_vn/lexer_vi_vn.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_vi_vn/menu_vi_vn.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_zh_cn/lexer_zh_cn.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_zh_cn/menu_zh_cn.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_zh_tw/lexer_zh_tw.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"

language/np3_zh_tw/menu_zh_tw.rc

@@ -1,4 +1,4 @@
-// Microsoft Visual C++ generated resource script.
+// Microsoft Visual C++ generated resource script.
 // encoding: UTF-8
 #pragma code_page(65001)  // UTF-8
 #include "resource.h"