diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..bb58ad2
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,6 @@
+# Normalize line endings in the repo; checkout uses the platform default
+* text=auto
+
+*.png binary
+*.jpg binary
+*.bin binary
diff --git a/.gitignore b/.gitignore
index 439439a..652a243 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,13 @@ src/esp32/secrets.h
 
 # Claude Code local settings
 .claude/settings.local.json
+
+# OS files
+Thumbs.db
+desktop.ini
+.DS_Store
+
+# Editor temp / backup files
+*.swp
+*~
+*.bak