it works

.gitignore

+/target

Cargo.lock

+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "anyhow"
+version = "1.0.95"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34ac096ce696dc2fcabef30516bb13c0a68a11d30131d3df6f04711467681b04"
+
+[[package]]
+name = "cargo-gg"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+]

Cargo.toml

+[package]
+name = "cargo-gg"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+anyhow = "1.0.95"

src/main.rs

+use std::{env, fs::File, process::Command};
+
+fn main() -> anyhow::Result<()> {
+    let mut arg_iter = env::args().peekable();
+    arg_iter.next();
+
+    if arg_iter.peek().map_or(false, |arg| arg == "gg") {
+        let _ = arg_iter.next();
+    }
+
+    let args: Vec<_> = arg_iter.collect();
+
+    let mut cmd = Command::new("cargo");
+    cmd.args(args);
+
+    let status = cmd.status()?;
+    let code = status.code().unwrap_or(1);
+
+    let path = env::temp_dir().join(".gg-failed");
+
+    if code == 0 {
+        if std::fs::exists(&path)? {
+            println!("Good girl!");
+
+            let _ = std::fs::remove_file(path);
+        }
+    } else {
+        let _ = File::create(env::temp_dir().join(".gg-failed"));
+    }
+
+    Ok(())
+}