diff --git a/.gitignore b/.gitignore
index 14af599..b8c62af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -46,6 +46,9 @@ desktop.ini
 
 # Research (reference only, not needed in published plugin)
 RESEARCH.md
+
+# Release build artifacts (uploaded to GitHub Release assets, not committed to main; see DTD#55)
+*.zip
 # Phase 2c: release-doc-sync verification trigger (DTD#5)
 
 # DTD#27: release-doc-sync v1 migration verification
diff --git a/unity-developer-tools-v1.4.3.zip b/unity-developer-tools-v1.4.3.zip
deleted file mode 100644
index b43501f..0000000
Binary files a/unity-developer-tools-v1.4.3.zip and /dev/null differ
diff --git a/unity-developer-tools-v1.4.4.zip b/unity-developer-tools-v1.4.4.zip
deleted file mode 100644
index 66f3d81..0000000
Binary files a/unity-developer-tools-v1.4.4.zip and /dev/null differ