imp: make prompt method asynchronous

Cargo.toml

@@ -4,4 +4,8 @@ version = "0.0.2"
 edition = "2024"
 
 [dependencies]
+async-trait = "0.1.89"
 thiserror = "2.0.17"
+
+[dev-dependencies]
+tokio = { version = "1.49.0", features = ["full"] }

examples/basic.rs

@@ -0,0 +1,15 @@
+use parrot::llm::get_available_models;
+
+#[tokio::main]
+async fn main() {
+    let available_models = get_available_models().expect("failed to get models");
+
+    for model in available_models.into_iter() {
+        let out = model
+            .prompt("reply with a check mark if this request is successful")
+            .await
+            .expect("failed to prompt");
+
+        println!("{} - {}", model.get_name(), out.trim());
+    }
+}

src/llm/anthropic.rs

@@ -2,6 +2,8 @@ use crate::error::LLMError;
 
 use super::{Model, ModelFactory, constants::names};
 
+use async_trait::async_trait;
+
 use std::env::var;
 
 const ANTHROPIC_API_KEY: &str = "ANTHROPIC_API_KEY";
@@ -21,12 +23,13 @@ impl ModelFactory for Anthropic {
     }
 }
 
+#[async_trait]
 impl Model for Anthropic {
     fn get_name(&self) -> String {
         names::ANTHROPIC.into()
     }
 
-    fn prompt(&self, _: &str) -> Result<String, LLMError> {
+    async fn prompt(&self, _: &str) -> Result<String, LLMError> {
         unimplemented!("anthropic api")
     }
 }

src/llm/claude.rs

@@ -1,5 +1,7 @@
 use std::process::Command;
 
+use async_trait::async_trait;
+
 use crate::{
     error::LLMError,
     llm::{Model, ModelFactory, constants::names},
@@ -20,12 +22,13 @@ impl ModelFactory for Claude {
     }
 }
 
+#[async_trait]
 impl Model for Claude {
     fn get_name(&self) -> String {
         names::CLAUDE.into()
     }
 
-    fn prompt(&self, input: &str) -> Result<String, LLMError> {
+    async fn prompt(&self, input: &str) -> Result<String, LLMError> {
         let out = Command::new(CLAUDE_CLI_NAME)
             .args([input, "-p"])
             .output()

src/llm/cursor.rs

@@ -1,3 +1,5 @@
+use async_trait::async_trait;
+
 use crate::{
     error::LLMError,
     llm::{Model, ModelFactory, constants::names},
@@ -20,12 +22,13 @@ impl ModelFactory for CursorCLI {
     }
 }
 
+#[async_trait]
 impl Model for CursorCLI {
     fn get_name(&self) -> String {
         names::CURSOR.into()
     }
 
-    fn prompt(&self, input: &str) -> Result<String, LLMError> {
+    async fn prompt(&self, input: &str) -> Result<String, LLMError> {
         let out = Command::new(CURSOR_CLI_NAME)
             .args([input, "-p"])
             .output()