fix: Agent delegation tools were not being passed into the {{__tools__}} placeholder so agents weren't delegating to subagents

src/config/agent.rs

@@ -140,7 +140,6 @@ impl Agent {
         }
 
         config.write().mcp_registry = Some(new_mcp_registry);
-        agent_config.replace_tools_placeholder(&functions);
 
         agent_config.load_envs(&config.read());
 
@@ -212,6 +211,8 @@ impl Agent {
             functions.append_supervisor_functions();
         }
 
+        agent_config.replace_tools_placeholder(&functions);
+
         Ok(Self {
             name: name.to_string(),
             config: agent_config,