refactor(agent): Improve thread-safe tool management with Arc

- Wrap agent tools in an Arc for safe concurrent access
- Modify tool addition methods to work with Arc-wrapped HashMap
- Ensure thread-safe tool registration and retrieval
- Update stream processing to use Arc-cloned tools reference

api/src/utils/agent/agent.rs

@@ -4,7 +4,7 @@ use crate::utils::{
 };
 use anyhow::Result;
 use serde_json::Value;
-use std::{collections::HashMap, env};
+use std::{collections::HashMap, env, sync::Arc};
 use tokio::sync::mpsc;
 use serde::Serialize;
 
@@ -17,7 +17,7 @@ pub struct Agent {
     /// Client for communicating with the LLM provider
     llm_client: LiteLLMClient,
     /// Registry of available tools, mapped by their names
-    tools: HashMap<String, Box<dyn ToolExecutor<Output = Value>>>,
+    tools: Arc<HashMap<String, Box<dyn ToolExecutor<Output = Value>>>>,
     /// The model identifier to use (e.g., "gpt-4")
     model: String,
 }
@@ -35,7 +35,7 @@ impl Agent {
 
         Self {
             llm_client,
-            tools,
+            tools: Arc::new(tools),
             model,
         }
     }
@@ -46,7 +46,10 @@ impl Agent {
     /// * `name` - The name of the tool, used to identify it in tool calls
     /// * `tool` - The tool implementation that will be executed
     pub fn add_tool(&mut self, name: String, tool: impl ToolExecutor<Output = Value> + 'static) {
-        self.tools.insert(name, Box::new(tool));
+        // Get a mutable reference to the HashMap inside the Arc
+        Arc::get_mut(&mut self.tools)
+            .expect("Failed to get mutable reference to tools")
+            .insert(name, Box::new(tool));
     }
 
     /// Add multiple tools to the agent at once
@@ -57,8 +60,10 @@ impl Agent {
         &mut self,
         tools: HashMap<String, E>,
     ) {
+        let tools_map = Arc::get_mut(&mut self.tools)
+            .expect("Failed to get mutable reference to tools");
         for (name, tool) in tools {
-            self.tools.insert(name, Box::new(tool));
+            tools_map.insert(name, Box::new(tool));
         }
     }
 
@@ -175,8 +180,8 @@ impl Agent {
         let (tx, rx) = mpsc::channel(100);
         let mut pending_tool_calls = HashMap::new();
 
-        // Clone the tools map for use in the spawned task
+        // Clone the Arc for use in the spawned task
-        let tools_for_execution = self.tools.clone();
+        let tools_ref = self.tools.clone();
 
         println!("DEBUG: Stream initialized, starting processing task");
 
@@ -220,7 +225,7 @@ impl Agent {
                                 
                                 // Check if this tool call is complete and ready for execution
                                 if let Some(complete_tool_call) = pending_tool_calls.get(&tool_call.id) {
-                                    if let Some(tool) = tools_for_execution.get(&complete_tool_call.function.name) {
+                                    if let Some(tool) = tools_ref.get(&complete_tool_call.function.name) {
                                         println!("DEBUG: Executing tool: {}", complete_tool_call.function.name);
                                         
                                         // Execute the tool