diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 5fc1f0f..4801598 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -14,6 +14,18 @@ env:
   RUSTFLAGS: -C link-arg=-s
 
 jobs:
+  format:
+    name: Check rust format
+    runs-on: ubuntu-latest
+    timeout-minutes: 45
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup rust
+        run: |
+          rustup toolchain install nightly --profile minimal --component rustfmt --no-self-update
+      - name: Run cargo fmt
+        run: cargo +nightly fmt --check
+
   test:
     name: ${{ matrix.cmd.name }} (Rust ${{ matrix.rust }}) ${{ matrix.features }}
     runs-on: ubuntu-latest
@@ -83,6 +95,8 @@ jobs:
           file target/${{ matrix.target.target }}/release/rust-github-actions-test${{ matrix.target.ext }}
           stat target/${{ matrix.target.target }}/release/rust-github-actions-test${{ matrix.target.ext }}
           mv target/${{ matrix.target.target }}/release/rust-github-actions-test${{ matrix.target.ext }} badgemagic.${{ matrix.target.target }}${{ matrix.target.ext }}
+      - name: Run for ${{ matrix.target.name }}
+        run: ./badgemagic.${{ matrix.target.target }}${{ matrix.target.ext }} --help
       - uses: actions/upload-artifact@v4
         with:
           name: badgemagic.${{ matrix.target.target }}${{ matrix.target.ext }}
@@ -92,6 +106,7 @@ jobs:
   ready:
     name: All required checks passed
     needs:
+      - format
       - test
       - build
     runs-on: ubuntu-latest
@@ -104,6 +119,7 @@ jobs:
     permissions:
       contents: write
     needs:
+      - format
       - test
       - build
     runs-on: ubuntu-latest
diff --git a/Cargo.lock b/Cargo.lock
index 93ecf2c..e603e60 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,11 +2,60 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "anstream"
+version = "0.6.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "418c75fa768af9c03be99d17643f93f79bbba589895012a80e3452a19ddda15b"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "038dfcf04a5feb68e9c60b21c9625a54c2c0616e79b72b0fd87075a056ae1d1b"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c03a11a9034d92058ceb6ee011ce58af4a9bf61491aa7e1e59ecd24bd40d22d4"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad186efb764318d35165f1758e7dcef3b10628e26d41a44bc5550652e6804391"
+dependencies = [
+ "windows-sys 0.52.0",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "61a38449feb7068f52bb06c12759005cf459ee52bb4adc1d5a7c4322d716fb19"
+dependencies = [
+ "anstyle",
+ "windows-sys 0.52.0",
+]
+
 [[package]]
 name = "cc"
-version = "1.0.98"
+version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "41c270e7540d725e65ac7f1b212ac8ce349719624d7bcff99f8e2e488e8cf03f"
+checksum = "96c51067fd44124faa7f870b4b1c969379ad32b2ba805aa959430ceaa384f695"
 
 [[package]]
 name = "cfg-if"
@@ -14,6 +63,58 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "clap"
+version = "4.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a9689a29b593160de5bc4aacab7b5d54fb52231de70122626c178e6a368994c7"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e5387378c84f6faa26890ebf9f0a92989f8873d4d380467bcd0d8d8620424df"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c780290ccf4fb26629baa7a1081e68ced113f1d3ec302fa5948f1c381ebf06c6"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b82cf0babdbd58558212896d1a4272303a57bdb245c2bf1147185fb45640e70"
+
+[[package]]
+name = "colorchoice"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b6a852b24ab71dffc585bcb46eaf7959d175cb865a7152e35b348d1b2960422"
+
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "hidapi"
 version = "2.6.1"
@@ -24,9 +125,15 @@ dependencies = [
  "cfg-if",
  "libc",
  "pkg-config",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8478577c03552c21db0e2724ffb8986a5ce7af88107e6be5d2ee6e158c12800"
+
 [[package]]
 name = "libc"
 version = "0.2.155"
@@ -39,20 +146,77 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
+[[package]]
+name = "proc-macro2"
+version = "1.0.85"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22244ce15aa966053a896d1accb3a6e68469b97c7f33f284b99f0d576879fc23"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
+dependencies = [
+ "proc-macro2",
+]
+
 [[package]]
 name = "rust-github-actions-test"
 version = "0.1.0"
 dependencies = [
+ "clap",
  "hidapi",
 ]
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
+[[package]]
+name = "syn"
+version = "2.0.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c42f3f41a2de00b01c0aaad383c5a45241efc8b2d1eda5661812fda5f3cdcff5"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "unicode-ident",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
+
+[[package]]
+name = "utf8parse"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "711b9620af191e0cdc7468a8d14e709c3dcdb115b36f838e601583af800a370a"
+
 [[package]]
 name = "windows-sys"
 version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.48.5",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets 0.52.5",
 ]
 
 [[package]]
@@ -61,13 +225,29 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
 dependencies = [
- "windows_aarch64_gnullvm",
- "windows_aarch64_msvc",
- "windows_i686_gnu",
- "windows_i686_msvc",
- "windows_x86_64_gnu",
- "windows_x86_64_gnullvm",
- "windows_x86_64_msvc",
+ "windows_aarch64_gnullvm 0.48.5",
+ "windows_aarch64_msvc 0.48.5",
+ "windows_i686_gnu 0.48.5",
+ "windows_i686_msvc 0.48.5",
+ "windows_x86_64_gnu 0.48.5",
+ "windows_x86_64_gnullvm 0.48.5",
+ "windows_x86_64_msvc 0.48.5",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f0713a46559409d202e70e28227288446bf7841d3211583a4b53e3f6d96e7eb"
+dependencies = [
+ "windows_aarch64_gnullvm 0.52.5",
+ "windows_aarch64_msvc 0.52.5",
+ "windows_i686_gnu 0.52.5",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc 0.52.5",
+ "windows_x86_64_gnu 0.52.5",
+ "windows_x86_64_gnullvm 0.52.5",
+ "windows_x86_64_msvc 0.52.5",
 ]
 
 [[package]]
@@ -76,38 +256,86 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7088eed71e8b8dda258ecc8bac5fb1153c5cffaf2578fc8ff5d61e23578d3263"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9985fd1504e250c615ca5f281c3f7a6da76213ebd5ccc9561496568a2752afb6"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88ba073cf16d5372720ec942a8ccbf61626074c6d4dd2e745299726ce8b89670"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87f4261229030a858f36b459e748ae97545d6f1ec60e5e0d6a3d32e0dc232ee9"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "db3c2bf3d13d5b658be73463284eaf12830ac9a26a90c717b7f771dfe97487bf"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4e4246f76bdeff09eb48875a0fd3e2af6aada79d409d33011886d3e1581517d9"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "852298e482cd67c356ddd9570386e2862b5673c85bd5f88df9ab6802b334c596"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
diff --git a/Cargo.toml b/Cargo.toml
index 91c44fe..9c5dd30 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "rust-github-actions-test"
 version = "0.1.0"
+authors = ["Martin Michaelis <code@mgjm.de>"]
 edition = "2021"
 
 [[bin]]
@@ -13,4 +14,5 @@ example = []
 cli = ["example"]
 
 [dependencies]
+clap = { version = "4.5.6", features = ["derive"] }
 hidapi = "2.6.1"
diff --git a/README.md b/README.md
index 1a0a202..505140f 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ The latest commit on the main branch just gets build and released automatically.
 
 Download the prebuild program for one of the following operating systems:
 
-- [Linux (GNU / 64 bit)](../../releaset/download/badgemagic.x86_64-unknown-linux-gnu)
+- [Linux (GNU / 64 bit)](../../releases/download/badgemagic.x86_64-unknown-linux-gnu)
 - [Windows (64 bit)](../../releases/latest/download/badgemagic.x86_64-pc-windows-msvc.exe)
 - [MacOS (Intel)](../../releases/latest/download/badgemagic.x86_64-apple-darwin)
 - [MacOS (M1, etc.)](../../releases/latest/download/badgemagic.aarch64-apple-darwin)
@@ -93,7 +93,7 @@ mode = "center"
 text = "Hello"
 ```
 
-If you want you can "draw" images as ascii art (`_` = Off, `X` = On):
+If you want you can "draw" images as ASCII art (`_` = Off, `X` = On):
 ```toml
 [[message]]
 mode = "center"
diff --git a/build.rs b/build.rs
new file mode 100644
index 0000000..413b504
--- /dev/null
+++ b/build.rs
@@ -0,0 +1,41 @@
+fn main() {
+    #[cfg(feature = "cli")]
+    cli::generate_version_info();
+}
+
+#[cfg(feature = "cli")]
+mod cli {
+    use std::{env, fs, path::PathBuf, process::Command, str};
+
+    pub fn generate_version_info() {
+        let pkg_version = env::var("CARGO_PKG_VERSION").expect("missing package version");
+        let git_version = git_version();
+        let git_prefix = git_version
+            .is_some()
+            .then_some("commit-")
+            .unwrap_or_default();
+        let git_version = git_version.as_deref().unwrap_or("unknown");
+        let version = format!("{pkg_version}-git.{git_prefix}{git_version}");
+
+        let out: PathBuf = env::var_os("OUT_DIR").expect("build output path").into();
+        fs::write(
+            out.join("cli.rs"),
+            format!("pub const VERSION: &str = {version:?};\n"),
+        )
+        .expect("write cli.rs");
+    }
+
+    fn git_version() -> Option<String> {
+        let output = Command::new("git")
+            .arg("describe")
+            .arg("--always")
+            .arg("--dirty=-modified")
+            .output()
+            .ok()?;
+        if output.status.success() {
+            Some(str::from_utf8(&output.stdout).ok()?.trim().into())
+        } else {
+            None
+        }
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index d2bc429..00784f0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -11,3 +11,8 @@ pub fn foo() {
 pub fn foo() {
     println!("the C runtime should be dynamically linked");
 }
+
+#[cfg(feature = "cli")]
+pub mod cli {
+    include!(concat!(env!("OUT_DIR"), "/cli.rs"));
+}
diff --git a/src/main.rs b/src/main.rs
index af65d04..c5bfef7 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,8 +1,36 @@
 #![warn(clippy::all, clippy::pedantic)]
 
+use std::path::PathBuf;
+
+use clap::Parser;
 use rust_github_actions_test::foo;
 
+#[derive(Parser)]
+/// Upload a configuration with up to 8 messages to an LED badge
+#[clap(
+    version = rust_github_actions_test::cli::VERSION,
+    author,
+    help_template = "\
+{before-help}{name} {version}
+{author-with-newline}
+{about-with-newline}
+{usage-heading} {usage}
+
+{all-args}{after-help}
+    ",
+)]
+struct Args {
+    /// File format of the config file (toml, json)
+    #[clap(long)]
+    format: Option<String>,
+
+    /// Path to TOML configuration file
+    config: PathBuf,
+}
+
 fn main() {
+    let args = Args::parse();
+
     println!(
         "Hello, world V2!: {:?} {:?}",
         std::path::MAIN_SEPARATOR,