diff --git a/.github/workflows/default.yml b/.github/workflows/default.yml
new file mode 100644
index 0000000..b373edf
--- /dev/null
+++ b/.github/workflows/default.yml
@@ -0,0 +1,64 @@
+on:
+  workflow_dispatch:
+  pull_request:
+  push:
+    branches:
+      - main
+
+jobs:
+  test-default:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - id: run
+        uses: ./
+
+      - run: test -n "${{ steps.run.outputs.node-build-version }}"
+      - run: test "${{ steps.run.outputs.node-version }}" = "$(< .node-version)"
+
+  test-with-path:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - id: run
+        uses: ./
+        with:
+          node-version-path: .nvmrc
+
+      - run: test -n "${{ steps.run.outputs.node-build-version }}"
+      - run: test "${{ steps.run.outputs.node-version }}" = "$(< .nvmrc)"
+
+  test-with-version:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - id: run
+        continue-on-error: true
+        uses: ./
+        with:
+          node-version: 999.999.999
+
+      - run: test -n "${{ steps.run.outputs.node-build-version }}"
+      - run: test "${{ steps.run.outputs.node-version }}" = "999.999.999"
+      - run: test "${{ steps.run.outcome }}" = "failure"
+
+  release:
+    needs:
+      - test-default
+      - test-with-path
+      - test-with-version
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: cycjimmy/semantic-release-action@v4
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - uses: Actions-R-Us/actions-tagger@v2
+        with:
+          publish_latest_tag: true
diff --git a/.node-version b/.node-version
new file mode 100644
index 0000000..6569dfa
--- /dev/null
+++ b/.node-version
@@ -0,0 +1 @@
+20.8.1
diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..6569dfa
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+20.8.1
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..9c94326
--- /dev/null
+++ b/README.md
@@ -0,0 +1,57 @@
+[![Test](https://github.com/matzkoh/check-node-version/actions/workflows/test.yml/badge.svg)](https://github.com/matzkoh/check-node-version/actions/workflows/test.yml)
+
+# matzkoh/check-node-version
+
+This GitHub Action checks if commands like `nodenv install` will definitely succeed.
+
+It checks the `node-build` repository, which is the source of the installation, and fails if the target version does not exist.
+
+## Examples
+
+### Basic
+
+```yaml
+steps:
+  - uses: actions/checkout@v4
+    with:
+      sparse-checkout: /.node-version
+      sparse-checkout-cone-mode: false
+
+  - uses: matzkoh/check-node-version@v1
+```
+
+### Optional
+
+```yaml
+steps:
+  - uses: actions/checkout@v4
+    with:
+      sparse-checkout: /.node-version
+      sparse-checkout-cone-mode: false
+
+  - id: check-node-version
+    continue-on-error: true # continue even if the node version is not yet released
+    uses: matzkoh/check-node-version@v1
+    with:
+      node-version-path: .nvmrc # use a file other than `.node-version` if desired
+
+  - run: echo ${{ steps.check-node-version.outcome == 'success' && 'released 😀' || 'not yet released 😢' }}
+```
+
+## Inputs
+
+See [action.yml](action.yml)
+
+| Name                | Description                                                         | Default         | Required |
+| ------------------- | ------------------------------------------------------------------- | --------------- | -------- |
+| `node-version-path` | Path to the file containing the node version to check               | `.node-version` | ❌       |
+| `node-version`      | Node version to check. If not specified, it will be read from file. |                 | ❌       |
+
+## Outputs
+
+See [action.yml](action.yml)
+
+| Name                 | Description                                                          |
+| -------------------- | -------------------------------------------------------------------- |
+| `node-version`       | Same as `node-version` input. Checked version.                       |
+| `node-build-version` | Latest release version of brew `node-build` formula used for checks. |
diff --git a/action.yml b/action.yml
new file mode 100644
index 0000000..96b8a6a
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,37 @@
+name: check-node-version
+description: GitHub Actions to check if node-version has been released and is available via brew node-build.
+author: matzkoh
+
+inputs:
+  node-version:
+    description: The version to check
+  node-version-path:
+    description: The path to the .node-version file
+    default: .node-version
+
+runs:
+  using: composite
+  steps:
+    - id: check
+      shell: bash
+      run: |
+        if [ -n "${{ inputs.node-version }}" ]; then
+          node-version=${{ inputs.node-version }}
+        else
+          node-version=$(< ${{ inputs.node-version-path }})
+        fi
+
+        node-build-version=$(curl -s 'https://formulae.brew.sh/api/formula/node-build.json' | jq -r '.versions.stable')
+
+        echo "node-version=${node-version}" >> $GITHUB_OUTPUT
+        echo "node-build-version=${node-build-version}" >> $GITHUB_OUTPUT
+
+        curl -fsIo /dev/null "https://raw.githubusercontent.com/nodenv/node-build/v${node-build-version}/share/node-build/${node-version}"
+
+outputs:
+  node-version:
+    description: The version in .node-version
+    value: ${{ steps.check.outputs.node-version }}
+  node-build-version:
+    description: The latest node-build version
+    value: ${{ steps.check.outputs.node-build-version }}
diff --git a/release.config.cjs b/release.config.cjs
new file mode 100644
index 0000000..3778f45
--- /dev/null
+++ b/release.config.cjs
@@ -0,0 +1,9 @@
+/** @type {import('semantic-release').GlobalConfig} */
+module.exports = {
+  branches: ['main'],
+  plugins: [
+    '@semantic-release/commit-analyzer',
+    '@semantic-release/release-notes-generator',
+    '@semantic-release/github',
+  ],
+}