diff --git a/ruby/.irbrc b/ruby/.irbrc
new file mode 100644
index 0000000..893243b
--- /dev/null
+++ b/ruby/.irbrc
@@ -0,0 +1,19 @@
+# Runtime Configuration for IRB (Interactive Ruby)
+require 'irb/completion'
+
+IRB.conf[:AUTO_INDENT] = true
+
+# History configuration
+IRB.conf[:SAVE_HISTORY] = 1000
+IRB.conf[:HISTORY_FILE] = "#{ENV["HOME"]}/.history/ruby"
+
+# Custom Prompt
+
+IRB.conf[:PROMPT][:MY_PROMPT] = {
+  :AUTO_INDENT => true,
+  :PROMPT_I => "\033[1;31m>>\033[0m ",
+  :PROMPT_S => "\033[1;31m\">\033[0m ",
+  :PROMPT_C => "\033[1;31m?>\033[0m ",
+  :RETURN => "\033[1;35m=>\033[0m %s\n"
+}
+IRB.conf[:PROMPT_MODE] = :MY_PROMPT