diff --git a/.gitignore b/.gitignore
index e34821e..bc805cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -60,6 +60,9 @@ atlassian-ide-plugin.xml
 # Cursive Clojure plugin
 .idea/replstate.xml
 
+# Codestream Plugin
+.idea/codestream.xml
+
 # Crashlytics plugin (for Android Studio and IntelliJ)
 com_crashlytics_export_strings.xml
 crashlytics.properties
@@ -84,3 +87,6 @@ Cargo.lock
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
+# Prototype directory 
+sample_data/**/build/prototype/i386
+