cargo fmt: format all Rust source files

products/01-llm-cost-router/src/router/mod.rs

@@ -41,13 +41,21 @@ impl RouterBrain {
             .get("messages")
             .and_then(|m| m.as_array())
             .and_then(|msgs| {
-                msgs.iter().find(|m| m.get("role").and_then(|r| r.as_str()) == Some("system"))
+                msgs.iter()
+                    .find(|m| m.get("role").and_then(|r| r.as_str()) == Some("system"))
             })
             .and_then(|m| m.get("content"))
             .and_then(|c| c.as_str())
             .unwrap_or("");
 
-        let high_complexity_keywords = ["analyze", "reason", "compare", "evaluate", "synthesize", "debate"];
+        let high_complexity_keywords = [
+            "analyze",
+            "reason",
+            "compare",
+            "evaluate",
+            "synthesize",
+            "debate",
+        ];
         let has_complex_task = high_complexity_keywords
             .iter()
             .any(|kw| system_prompt.to_lowercase().contains(kw));
@@ -142,7 +150,9 @@ mod tests {
         ];
         for i in 0..12 {
             messages.push(serde_json::json!({"role": "user", "content": format!("Turn {}", i)}));
-            messages.push(serde_json::json!({"role": "assistant", "content": format!("Response {}", i)}));
+            messages.push(
+                serde_json::json!({"role": "assistant", "content": format!("Response {}", i)}),
+            );
         }
         let request = serde_json::json!({ "model": "gpt-4o", "messages": messages });
         let complexity = brain.classify_complexity(&request);