Works well for very well defined task. If you have a really big feature like a front end migration, you can use /plan, and /goal which i think is in most harnesses. You can also use other tools that allow your agent to interact with other terminals(I use an ADE called orca) that has an orca skill where an agent can spin up different sessions(different from subtasks because they share the context and you can chose the harness/model unlike sub agents). Can also read from the terminal, use your browser or computer and task screenshots and after prepare a report or something.