feat: add runtime metrics to completion response (#2404)

crates/goose-llm/src/completion.rs

@@ -5,53 +5,13 @@ use std::collections::HashMap;
 
 use goose::message::Message;
 use goose::model::ModelConfig;
-use goose::providers::base::ProviderUsage;
 use goose::providers::create;
 use goose::providers::errors::ProviderError;
-use mcp_core::tool::Tool;
+
+use std::time::Instant;
 
 use crate::prompt_template;
-use serde::{Deserialize, Serialize};
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct CompletionResponse {
-    message: Message,
-    usage: ProviderUsage,
-}
-
-impl CompletionResponse {
-    pub fn new(message: Message, usage: ProviderUsage) -> Self {
-        Self { message, usage }
-    }
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct Extension {
-    name: String,
-    instructions: Option<String>,
-    tools: Vec<Tool>,
-}
-
-impl Extension {
-    pub fn new(name: String, instructions: Option<String>, tools: Vec<Tool>) -> Self {
-        Self {
-            name,
-            instructions,
-            tools,
-        }
-    }
-
-    pub fn get_prefixed_tools(&self) -> Vec<Tool> {
-        self.tools
-            .iter()
-            .map(|tool| {
-                let mut prefixed_tool = tool.clone();
-                prefixed_tool.name = format!("{}__{}", self.name, tool.name);
-                prefixed_tool
-            })
-            .collect()
-    }
-}
+use crate::{CompletionResponse, Extension, RuntimeMetrics};
 
 /// Public API for the Goose LLM completion function
 pub async fn completion(
@@ -61,6 +21,7 @@ pub async fn completion(
     messages: &[Message],
     extensions: &[Extension],
 ) -> Result<CompletionResponse, ProviderError> {
+    let start_total = Instant::now();
     let provider = create(provider, model_config).unwrap();
     let system_prompt = construct_system_prompt(system_preamble, extensions);
     // println!("\nSystem prompt: {}\n", system_prompt);
@@ -69,8 +30,24 @@ pub async fn completion(
         .iter()
         .flat_map(|ext| ext.get_prefixed_tools())
         .collect::<Vec<_>>();
+
+    let start_provider = Instant::now();
     let (response, usage) = provider.complete(&system_prompt, messages, &tools).await?;
-    let result = CompletionResponse::new(response.clone(), usage.clone());
+    let total_time_ms_provider = start_provider.elapsed().as_millis();
+    let total_time_ms = start_total.elapsed().as_millis();
+
+    let tokens_per_second = usage.usage.total_tokens.and_then(|toks| {
+        if total_time_ms_provider > 0 {
+            Some(toks as f64 / (total_time_ms_provider as f64 / 1000.0))
+        } else {
+            None
+        }
+    });
+
+    let runtime_metrics =
+        RuntimeMetrics::new(total_time_ms, total_time_ms_provider, tokens_per_second);
+
+    let result = CompletionResponse::new(response.clone(), usage.clone(), runtime_metrics);
 
     Ok(result)
 }

crates/goose-llm/src/lib.rs

@@ -1,3 +1,6 @@
 mod completion;
 mod prompt_template;
-pub use completion::{completion, CompletionResponse, Extension};
+mod types;
+
+pub use completion::completion;
+pub use types::{CompletionResponse, Extension, RuntimeMetrics};

crates/goose-llm/src/types.rs

@@ -0,0 +1,70 @@
+use goose::message::Message;
+use goose::providers::base::ProviderUsage;
+use mcp_core::tool::Tool;
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CompletionResponse {
+    message: Message,
+    usage: ProviderUsage,
+    runtime_metrics: RuntimeMetrics,
+}
+
+impl CompletionResponse {
+    pub fn new(message: Message, usage: ProviderUsage, runtime_metrics: RuntimeMetrics) -> Self {
+        Self {
+            message,
+            usage,
+            runtime_metrics,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct RuntimeMetrics {
+    pub total_time_ms: u128,
+    pub total_time_ms_provider: u128,
+    pub tokens_per_second: Option<f64>,
+}
+
+impl RuntimeMetrics {
+    pub fn new(
+        total_time_ms: u128,
+        total_time_ms_provider: u128,
+        tokens_per_second: Option<f64>,
+    ) -> Self {
+        Self {
+            total_time_ms,
+            total_time_ms_provider,
+            tokens_per_second,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Extension {
+    name: String,
+    instructions: Option<String>,
+    tools: Vec<Tool>,
+}
+
+impl Extension {
+    pub fn new(name: String, instructions: Option<String>, tools: Vec<Tool>) -> Self {
+        Self {
+            name,
+            instructions,
+            tools,
+        }
+    }
+
+    pub fn get_prefixed_tools(&self) -> Vec<Tool> {
+        self.tools
+            .iter()
+            .map(|tool| {
+                let mut prefixed_tool = tool.clone();
+                prefixed_tool.name = format!("{}__{}", self.name, tool.name);
+                prefixed_tool
+            })
+            .collect()
+    }
+}