diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5f22296a..b0cdd582 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -135,3 +135,37 @@ jobs:
 
       # Check that the release automation works as expected
       - run: scripts/release/test.sh
+
+  # Check that the Github Action works
+  github-action-test:
+    runs-on: ${{ matrix.os }}
+
+    strategy:
+      matrix:
+        # Make sure we cover all operating systems supported by Github Actions
+        os:
+          - windows-2019
+          - windows-2022
+          - ubuntu-20.04
+          - ubuntu-22.04
+          - macos-13
+          - macos-12
+          - macos-11
+
+    steps:
+      - uses: actions/checkout@v4
+
+      # This action downloads the latest released version of `cargo-marker`,
+      # and installs it into `$PATH`.
+      #
+      # Because `marker_lints` in this repo depends on the next dev version of
+      # `marker_api` it won't be compatible with the latest released `marker_api`,
+      # so there is no sense in actually running `cargo marker check` here.
+      # Therefore we set `install-only` to skip running a command.
+      - uses: ./
+        with:
+          install-only: true
+
+      # +stable is to force using the pre-installed `cargo` on the runner instead of
+      # what's specified in `rust-toolchain.toml`
+      - run: cargo +stable marker --version
diff --git a/action.yml b/action.yml
new file mode 100644
index 00000000..442b7e7a
--- /dev/null
+++ b/action.yml
@@ -0,0 +1,37 @@
+name: marker
+description: GitHub Action for installing and running Marker linting
+branding:
+  icon: edit-3
+  color: white
+
+inputs:
+  command:
+    description: >
+      CLI arguments that will be appended to `cargo marker` command.
+      By default `cargo marker check` will be run.
+      This is mutually exclusive with `install-only`.
+
+    default: check
+    required: false
+
+  install-only:
+    description: >
+      If set to `true` then the action will only install `cargo marker`,
+      and will skip running the `command`. This is mutually exclusive with `command`.
+
+    default: 'false'
+    required: false
+
+runs:
+  using: composite
+  steps:
+    - run: ${GITHUB_ACTION_PATH:?}/scripts/release/install.${{ runner.os == 'Windows' && 'ps1' || 'sh' }}
+      shell: bash
+
+    - run: cargo marker $COMMAND
+      if: ${{ inputs.install-only == 'false' }}
+      env:
+        # Put the command into the environment variable to prevent script injection and just allow
+        # passing arguments to the command.
+        COMMAND: ${{ inputs.command }}
+      shell: bash
diff --git a/scripts/release/install.ps1 b/scripts/release/install.ps1
index 3df360be..35291d5a 100644
--- a/scripts/release/install.ps1
+++ b/scripts/release/install.ps1
@@ -1,3 +1,5 @@
+#!/usr/bin/env powershell
+#
 # This script downloads the `cargo-marker` and the `marker_rustc_driver`
 # binaries from the GitHub release assets. It also sets up the required
 # Rust toolchain that the `marker_rustc_driver` depends on.
@@ -20,7 +22,7 @@ $ErrorActionPreference = "Stop"
 # This script isn't meant to be run from `master`, but if it is, then
 # it will install the latest version be it a stable version or a pre-release.
 # region replace-version unstable
-$version = "0.2.1"
+$version = "0.3.0"
 # endregion replace-version unstable
 
 $toolchain = "nightly-2023-08-24"
@@ -34,7 +36,7 @@ function With-Log {
     & $cmd @rest
 }
 
-function Extract-TarGz {
+function Unzip {
     param (
         [string]$bin,
         [string]$dest
@@ -43,9 +45,22 @@ function Extract-TarGz {
 
     With-Log cd $temp_dir
 
-    Check-Sha256Sum $file_stem "tar.gz"
+    Check-Sha256Sum $file_stem "zip"
 
-    With-Log tar --extract --file (Join-Path $temp_dir "$file_stem.tar.gz") --directory $dest
+    # There is `tar` on Windows installed by default, but it looks like different
+    # environments have extremely different variations of tar installed.
+    #
+    # For example, my home laptop with Windows 11 has `bsdtar 3.5.2` installed.
+    # It works fine with Windows paths out of the box. However, Windows Github Actions
+    # runner has `tar (GNU tar) 1.34`, which somehow doesn't work with Windows paths.
+    # It just doesn't eat a path with a driver letter and says "No such file or directory".
+    #
+    # Anyway, there is so much inconsistency between home windows and Github Actions, that
+    # it's just easier to use the PowerShell builtin unzip utility that has always been there.
+    With-Log Expand-Archive `
+        -Force `
+        -LiteralPath (Join-Path $temp_dir "$file_stem.zip") `
+        -DestinationPath $dest
 }
 
 # There isn't mktemp on Windows, so we have to reinvent the wheel.
@@ -103,6 +118,8 @@ $exe = if ([System.Environment]::OSVersion.Platform -eq "Win32NT") {
     ""
 }
 
+With-Log curl$exe --version
+
 With-Log rustup install --profile minimal --no-self-update $toolchain
 
 $host_triple = (
@@ -115,7 +132,7 @@ $current_dir = (Get-Location).Path
 $temp_dir = New-TemporaryDirectory
 
 try {
-    $files = "{cargo-marker,marker_rustc_driver}-$host_triple.{tar.gz,sha256}"
+    $files = "{cargo-marker,marker_rustc_driver}-$host_triple.{zip,sha256}"
 
     # Curl is available by default on windows, yay!
     # https://curl.se/windows/microsoft.html
@@ -130,7 +147,7 @@ try {
         --retry-connrefused `
         --remote-name `
         --output-dir $temp_dir `
-        "https://github.com/rust-marker/marker/releases/download/v$version/$files"
+        "https://github.com/Veetaha/marker/releases/download/v$version/$files"
 
     # There is a null coalescing operator in PowerShell 7, but that version
     # is too cutting edge for now.
@@ -140,10 +157,12 @@ try {
         Join-Path $HOME ".cargo"
     }
 
-    Extract-TarGz "cargo-marker" (Join-Path $cargo_home "bin")
+    Unzip "cargo-marker" (Join-Path $cargo_home "bin")
 
     $sysroot = (rustc +$toolchain --print sysroot)
-    Extract-TarGz "marker_rustc_driver" (Join-Path $sysroot "bin")
+    Unzip "marker_rustc_driver" (Join-Path $sysroot "bin")
+
+    With-Log cargo +$toolchain marker --version
 } finally {
     Write-Output "Removing the temp directory $temp_dir"
 
diff --git a/scripts/release/install.sh b/scripts/release/install.sh
index 7c4e024e..0ec5eb50 100755
--- a/scripts/release/install.sh
+++ b/scripts/release/install.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+#
 # This script downloads the `cargo-marker` and the `marker_rustc_driver`
 # binaries from the GitHub release assets. It also sets up the required
 # Rust toolchain that the `marker_rustc_driver` depends on.
@@ -16,7 +17,7 @@ set -Eeuo pipefail
 # This script isn't meant to be run from `master`, but if it is, then
 # it will install the latest version be it a stable version or a pre-release.
 # region replace-version unstable
-version=0.2.1
+version=0.3.0
 # endregion replace-version unstable
 
 toolchain=nightly-2023-08-24
@@ -26,11 +27,20 @@ function with_log {
     "$@"
 }
 
+with_log curl --version
+with_log grep --version
+with_log tar --version
+
 with_log rustup install --profile minimal --no-self-update $toolchain
 
+# MacOS uses some shitty BSD grep by default, and there isn't support for
+# `--perl-regexp` option there, so we have to go without using that.
+#
+# Example env where it doesn't work are `macos-11` and `macos-12` Github Actions runners.
 host_triple=$(\
-    rustc +$toolchain --version --verbose \
-    | grep --only-matching --perl-regexp 'host: \K.*' \
+    rustc "+$toolchain" --version --verbose \
+    | grep --only-matching 'host: .*' \
+    | grep --only-matching '[^ ]*$'
 )
 
 trap cleanup SIGINT SIGTERM ERR EXIT
@@ -47,6 +57,10 @@ function cleanup {
 files="{cargo-marker,marker_rustc_driver}-$host_triple.{tar.gz,sha256}"
 
 # Download all files using a single TCP connection with HTTP2 multiplexing
+# Unfortunately, `curl 7.68.0` installed on Ubuntu 20.04 Github Actions runner
+# doesn't have the `--output-dir` option (it was added in `7.73.0`), so we have
+# to do an explicit `pushd/popd` for the temp directory.
+with_log pushd "$temp_dir"
 with_log curl \
     --location \
     --silent \
@@ -55,8 +69,8 @@ with_log curl \
     --retry 5 \
     --retry-connrefused \
     --remote-name \
-    --output-dir "$temp_dir" \
-    "https://github.com/rust-marker/marker/releases/download/v$version/$files"
+    "https://github.com/Veetaha/marker/releases/download/v$version/$files"
+with_log popd
 
 function extract_archive {
     local bin="$1"
@@ -65,11 +79,21 @@ function extract_archive {
 
     # `--ignore-missing` because the `sha256` file also includes the checksum for `zip` archive,
     # but we only download the `tar.gz` one.
-    (with_log cd $temp_dir && with_log sha256sum --ignore-missing --check "$file_stem".sha256)
-
-    with_log tar --extract --file "$temp_dir/$file_stem.tar.gz" --directory "$dest"
+    #
+    # On MacOS there isn't `sha256sum` command, but there is `shasum` which is compatible.
+    (with_log cd $temp_dir && with_log shasum --ignore-missing --check "$file_stem".sha256)
+
+    # On Windows we also have `--force-local` here (see the reasoning for that in the PowerShell script).
+    # However, here we don't use this although it wouldn't hurt, but `bsdtar 3.5.1` on MacOS doesn't
+    # support this option.
+    with_log tar \
+        --extract \
+        --file "$temp_dir/$file_stem.tar.gz" \
+        --directory "$dest"
 }
 
 extract_archive cargo-marker "${CARGO_HOME-$HOME/.cargo}/bin"
 
-extract_archive marker_rustc_driver "$(rustc +$toolchain --print sysroot)/bin"
+extract_archive marker_rustc_driver "$(rustc "+$toolchain" --print sysroot)/bin"
+
+with_log cargo "+$toolchain" marker --version