diff --git a/.github/workflows/prettier.yml b/.github/workflows/prettier.yml
index 4eb1dc3..730d50f 100644
--- a/.github/workflows/prettier.yml
+++ b/.github/workflows/prettier.yml
@@ -2,9 +2,13 @@
 
 name: Format Code with Prettier
 
-# This workflow is triggered manually from the Actions tab.
+# This workflow is triggered on pushes to the `main` branch and on pull
+# requests.
 on:
-  workflow_dispatch:
+  push:
+    branches:
+      - main
+  pull_request:
 
 jobs:
   format:
@@ -42,7 +46,6 @@ jobs:
         uses: stefanzweifel/git-auto-commit-action@v5
         with:
           commit_message: "style: Format code with Prettier"
-          branch: ${{ github.ref }}
           # The file_pattern is set to all files, ensuring any change made by
           # Prettier is committed.
           file_pattern: "**/*.*"
diff --git a/docs/development.prettier-workflow.md b/docs/development.prettier-workflow.md
index dcef195..cf85aec 100644
--- a/docs/development.prettier-workflow.md
+++ b/docs/development.prettier-workflow.md
@@ -5,21 +5,18 @@ This repository includes a GitHub Actions workflow that automatically formats al
 ## Workflow Details
 
 - **Workflow File:** [`.github/workflows/prettier.yml`](../.github/workflows/prettier.yml)
-- **Trigger:** This workflow is **not** run automatically. It must be triggered manually.
-- **Action:** When run, the workflow will:
-  1. Check out the code from the branch it was run on.
+- **Trigger:** This workflow is triggered automatically on:
+  - Pushes to the `main` branch.
+  - Any pull request.
+- **Action:** When triggered, the workflow will:
+  1. Check out the code from the relevant branch or pull request.
   2. Install the necessary dependencies (`npm install`).
   3. Run `npx prettier --write .` to format all files.
-  4. If any files were changed by Prettier, the workflow will automatically commit the changes back to the same branch with the commit message `style: Format code with Prettier`.
+  4. If any files were changed by Prettier, the workflow will automatically commit the changes back to the same branch (for pushes) or the pull request's head branch with the commit message `style: Format code with Prettier`.
 
-## How to Use
+## How it Works
 
-To run the formatting workflow:
+The workflow runs automatically, so there are no manual steps required.
 
-1.  Navigate to the **Actions** tab of the repository on GitHub.
-2.  In the left sidebar, click on **"Format Code with Prettier"**.
-3.  Above the list of previous runs, you will see a message: "This workflow has a `workflow_dispatch` event trigger."
-4.  Click the **"Run workflow"** button.
-5.  Choose the branch you want to format and click the **"Run workflow"** button again.
-
-The workflow will then execute, and any formatting changes will be pushed to your chosen branch. This is useful for cleaning up a feature branch before creating a pull request.
+- **On the `main` branch:** When code is pushed to `main`, the workflow will run and commit any formatting changes directly to `main`.
+- **On Pull Requests:** When you open a pull request, the workflow will run on the code in your branch. If it finds any formatting issues, it will push a new commit to your branch with the fixes. This helps ensure that all code is properly formatted before it gets merged into `main`.