Move to multi crates project

Starting impl devcontainer spec

crates/herald-server/src/open_router.rs

@@ -0,0 +1,50 @@
+use std::time::Duration;
+
+use openrouter_rs::{Message, api::chat::ChatCompletionRequest};
+use tracing::instrument;
+
+pub struct ChatResult {
+    pub message: String,
+    pub cost: Option<f64>,
+}
+
+#[derive(Clone)]
+pub struct OpenRouterClient {
+    client: openrouter_rs::OpenRouterClient,
+    model: String,
+}
+
+impl OpenRouterClient {
+    pub fn new(token: &str, model: &str, timeout: u64) -> anyhow::Result<Self> {
+        Ok(Self {
+            client: openrouter_rs::OpenRouterClient::builder()
+                .api_key(token)
+                .http_client(
+                    reqwest::Client::builder()
+                        .timeout(Duration::from_secs(timeout))
+                        .build()?,
+                )
+                .build()?,
+            model: String::from(model),
+        })
+    }
+
+    #[instrument(skip(self), err)]
+    pub async fn chat(&self, msg: &str) -> anyhow::Result<ChatResult> {
+        let request = ChatCompletionRequest::builder()
+            .model(&self.model)
+            .enable_reasoning()
+            .messages(vec![Message::new(openrouter_rs::types::Role::User, msg)])
+            .build()?;
+
+        let response = self.client.chat().create(&request).await?;
+
+        Ok(ChatResult {
+            message: response.choices[0]
+                .content()
+                .map(String::from)
+                .ok_or(anyhow::anyhow!("No content"))?,
+            cost: response.usage.and_then(|u| u.cost),
+        })
+    }
+}