Platform extensions sketch (#4868)

Co-authored-by: Douwe Osinga <douwe@squareup.com>
Co-authored-by: Michael Neale <michael.neale@gmail.com>

crates/goose/tests/agent.rs

@@ -630,7 +630,7 @@ mod final_output_tool_tests {
         };
 
         let (_, result) = agent
-            .dispatch_tool_call(tool_call, "request_id".to_string(), None, &None)
+            .dispatch_tool_call(tool_call, "request_id".to_string(), None)
             .await;
 
         assert!(result.is_ok(), "Tool call should succeed");

crates/goose/tests/dynamic_task_tools_tests.rs

@@ -176,7 +176,8 @@ mod tests {
             "extensions": [
                 {
                     "type": "builtin",
-                    "name": "developer"
+                    "name": "developer",
+                    "description": "developer"
                 }
             ]
         });
@@ -421,6 +422,7 @@ mod tests {
                 {
                     "type": "stdio",
                     "name": "custom",
+                    "description": "Custom stdio",
                     "cmd": "echo",
                     "args": ["test"]
                 }

crates/goose/tests/mcp_integration_test.rs

@@ -188,7 +188,7 @@ async fn test_replayed_session(
     let envs = Envs::new(env);
     let extension_config = ExtensionConfig::Stdio {
         name: "test".to_string(),
-        description: Some("Test".to_string()),
+        description: "Test".to_string(),
         cmd,
         args,
         envs,

crates/goose/tests/private_tests.rs

@@ -817,7 +817,7 @@ async fn test_schedule_tool_dispatch() {
     };
 
     let (request_id, result) = agent
-        .dispatch_tool_call(tool_call, "test_dispatch".to_string(), None, &None)
+        .dispatch_tool_call(tool_call, "test_dispatch".to_string(), None)
         .await;
     assert_eq!(request_id, "test_dispatch");
     assert!(result.is_ok());