diff --git a/.gitignore b/.gitignore
index f6d6962..db1065d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,7 +12,6 @@
 /public/docs
 /tmp/*
 /yarn-error.log
-ER_Model.pdf
 spec/rspec_examples.txt
 .env
 
diff --git a/ER_Model.pdf b/ER_Model.pdf
new file mode 100644
index 0000000..ea0cbd2
Binary files /dev/null and b/ER_Model.pdf differ
diff --git a/README.md b/README.md
index e1d1832..fbab2c2 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,11 @@
 # Racxob
 
+## ERD
+
+(Below is an example PDF - it will auto update as you migrate - delete this comment!)
+
+View PROJECT_NAME ERD [here](./ER_Model.pdf)
+
 ## Usage
 
 (be sure to replace PROJECT_NAME with your project name)
diff --git a/lib/tasks/auto_generate_diagram.rake b/lib/tasks/auto_generate_diagram.rake
new file mode 100644
index 0000000..1df0696
--- /dev/null
+++ b/lib/tasks/auto_generate_diagram.rake
@@ -0,0 +1,6 @@
+# NOTE: only doing this in development as some production environments (Heroku)
+# NOTE: are sensitive to local FS writes, and besides -- it's just not proper
+# NOTE: to have a dev-mode tool do its thing in production.
+if Rails.env.development?
+  RailsERD.load_tasks
+end