Yes, that sounds like something that a harness would do internally, but not expose. My own project will do something similar for spinning off worker agents. You could expose it, however, by (1) a custom MCP server that assembles and provides the result directly into the context, or (2) see if you can wrangle the skill feature of an existing harness.
The newer models are nice, but the harness is the secret sauce that can make or break the experience. I wish we had better open tools for using/modifying these types of things.
