If it's okay to mention my own complementary open source project, Axiom¹ does a good job of helping coding harnesses know how to do this effectively for Apple OS development.
In addition to a deep roster of skills and agencts, Axiom includes several for-LLM tools². xclog, xcprof, xcsym, and xcui are designed to be used by LLMs, and expose capabilities in a token-efficient way. These tools are equally helpful for non-Axiom skills/agents.
¹ Axiom: https://charleswiltgen.github.io/Axiom/ ² Axiom CLI tools: https://charleswiltgen.github.io/Axiom/tools/