Basic example to try the harmony! macro

harmony/Cargo.toml

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+[package]
+name = "harmony"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+harmony_macros = { version = "0.1.0", path = "../harmony_macros" }
+async-trait = "0.1.89"
+tokio = { version = "1.48.0", features = ["rt", "rt-multi-thread", "macros"] }

harmony/src/lib.rs

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+use async_trait::async_trait;
+
+#[async_trait]
+pub trait Topology: Send + Sync {
+    fn name(&self) -> &str;
+    async fn ensure_ready(&self) -> Result<(), String>;
+}
+
+#[derive(Debug)]
+pub struct Inventory {
+    pub location: String,
+}
+
+#[async_trait]
+pub trait Score<T: Topology>: Send + Sync {
+    async fn interpret(&self, inventory: &Inventory, topology: &T) -> Result<(), String> {
+        let interpret = self.create_interpret();
+        interpret.execute(inventory, topology).await
+    }
+
+    fn name(&self) -> String;
+
+    #[doc(hidden)]
+    fn create_interpret(&self) -> Box<dyn Interpret<T>>;
+}
+
+#[async_trait]
+pub trait Interpret<T>: std::fmt::Debug + Send {
+    async fn execute(&self, inventory: &Inventory, topology: &T) -> Result<(), String>;
+}
+
+pub async fn run_cli<T: Topology>(
+    inventory: Inventory,
+    topology: T,
+    scores: Vec<Box<dyn Score<T>>>,
+) -> Result<(), String> {
+    for score in scores {
+        let interpret = score.create_interpret();
+        interpret.execute(&inventory, &topology).await?;
+    }
+
+    Ok(())
+}