diff --git a/github-actions/release-prepare/.env.example b/github-actions/release-prepare/.env.example
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index 0000000..c024a67
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+++ b/github-actions/release-prepare/.env.example
@@ -0,0 +1,4 @@
+GITHUB_TOKEN=PASTE_YOUR_TOKEN
+GITHUB_REPOSITORY=exampleorg/exampleproject
+RELEASE_BRANCH=main
+GITHUB_REF_NAME=develop
diff --git a/github-actions/release-prepare/.gitignore b/github-actions/release-prepare/.gitignore
new file mode 100644
index 0000000..4c49bd7
--- /dev/null
+++ b/github-actions/release-prepare/.gitignore
@@ -0,0 +1 @@
+.env
diff --git a/github-actions/release-prepare/README.md b/github-actions/release-prepare/README.md
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+# GitHub Action: release-prepare
+
+## Development
+
+This action encapsulates most of its complexity in a standalone Bash script that accepts environment variables, making it easy to test locally with the help of a `.env` file you can point at a test repository.
+
+1. Create `.env` from the template:
+
+    ```bash
+    cp .env.example .env
+    ```
+
+2. Paste a GitHub token and tailor repository/branches to your test target.
+
+3. Run bash script with `.env` applied to emulate GitHub Actions context:
+
+    ```bash
+    eval $(< .env) ./pull-request.sh
+    ```