Custom agents allow more specialised [[20250811123613-agentic-ai]] with focused expertise and tailored tool configurations. Different agents can be tailored for different things, e.g. one for reviewing code, one for planning code, etc.
In general it's recommended to use a planning agent before executing on said plan. This is why tools like OpenCode and Copilot CLI both have a Plan mode.
You can also use handoffs to create guided workflows between agents. Transition seamlessly from one specialized agent to another with a single select. For example, move from a planning agent directly into an implementation agent, or hand off to a code reviewer with the relevant context.