diff --git a/.gitignore b/.gitignore
index 5862186..d123bdc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,24 +1,47 @@
-otk_cpp_doc/
-.vs/
-.claude/
-.vscode/
-*.user
-*.userosscache
-*.suo
-*.ncrunch*
-*.dbmdl
-*.jfm
-*.userprefs
-*.aps
-*.cache
-*.ilk
-*.log
-*.tmp
-*.tmp_proj
-*.user
-*.userosscache
-*.sln.docstates
-.x64
-MFCCreoDll/x64/
-
-x64/*
\ No newline at end of file
+# Project docs / local tools
+otk_cpp_doc/
+.claude/
+.vscode/
+
+# Visual Studio workspace
+.vs/
+*.suo
+*.user
+*.userosscache
+*.sln.docstates
+
+# Build output directories
+[Dd]ebug/
+[Rr]elease/
+x64/
+[Bb]in/
+[Oo]bj/
+
+# C/C++ build artifacts
+*.obj
+*.pch
+*.pdb
+*.idb
+*.ipdb
+*.ilk
+*.tlog
+*.lastbuildstate
+*.recipe
+*.vcxproj.FileListAbsolute.txt
+
+# Logs / temp
+*.log
+*.tmp
+*.tmp_proj
+*.cache
+*.aps
+
+# Test / reports
+[Tt]est[Rr]esult*/
+[Bb]uild[Ll]og.*
+_UpgradeReport_Files/
+Backup*/
+UpgradeLog*.XML
+
+# NuGet / packages
+packages/