diff --git a/README.md b/README.md
index 518364c..0433f97 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@ pairing with smart people at Hashrocket.
 
 For a steady stream of TILs, [sign up for my newsletter](https://crafty-builder-6996.ck.page/e169c61186).
 
-_1675 TILs and counting..._
+_1676 TILs and counting..._
 
 See some of the other learning resources I work on:
 
@@ -942,6 +942,7 @@ If you've learned something here, support my efforts writing daily TILs by
 - [Set Inclusion With hstore](postgres/set-inclusion-with-hstore.md)
 - [Set A Seed For The Random Number Generator](postgres/set-a-seed-for-the-random-number-generator.md)
 - [Set A Statement Timeout Threshold For A Session](postgres/set-a-statement-timeout-threshold-for-a-session.md)
+- [Set Up A Project-Local Cluster With Postgres.app](postgres/set-up-a-project-local-cluster-with-postgres-app.md)
 - [Sets With The Values Command](postgres/sets-with-the-values-command.md)
 - [Shorthand Absolute Value Operator](postgres/shorthand-absolute-value-operator.md)
 - [Show All Versions Of An Operator](postgres/show-all-versions-of-an-operator.md)
diff --git a/postgres/set-up-a-project-local-cluster-with-postgres-app.md b/postgres/set-up-a-project-local-cluster-with-postgres-app.md
new file mode 100644
index 0000000..bf91ead
--- /dev/null
+++ b/postgres/set-up-a-project-local-cluster-with-postgres-app.md
@@ -0,0 +1,35 @@
+# Set Up A Project-Local Cluster With Postgres.app
+
+I want to set up a PostgreSQL cluster in my project directory. This helps
+provide some separation and clarity that this cluster and its databases are just
+for this project.
+
+This can be done with `Postgres.app` (on Mac) hitting the `+` button in the
+bottom left corner of the app. This will pop open a "Create new server" modal.
+
+From there, you'll want to give the server a name that you can identify within
+`Postgres.app`. E.g. "<App Name> Cluster"
+
+Then select the Postgres version. My existing project is still on 17, so I'll
+select that.
+
+The not so intuitive part is the _Data Directory_. Use the "Choose..." file
+picker to find the root directory of your project. Select that. Then click into
+the text input for the data directory and append the name of the data directory
+_to be created_ to that path. If I want it to all go in `postgres-data`, then my
+path will look like:
+
+```
+/Users/me/dev/my-app/postgres-data
+```
+
+The `postgres-data` directory doesn't exist yet. But it will in a moment.
+
+You probably want the default port, so leave that at `5432` unless you know
+otherwise.
+
+Click `Create server`, though that won't actually create the server yet. Now
+with that server selected in `Postgres.app` click the `Initialize` button. That
+will create the `postgres-data` directory and then run `initdb` under the hood
+which will add everything your server needs. It will now be running at that
+port, ready to connect.