I have a mix of Fable, Grok 4.5, and GPT 5.6 Sol that I use on a daily basis. How do you route or have different sets of instructions per agent / model?
For example, I use Pinchtab or Playwright when it is Claude or Grok. But the Codex app has a really great in-app browser so I want it to use that. That tool call isn't available in Claude or Grok though.
In other circumstances, certain agents need more process around them to make up for model inefficiencies which don't exist in other models. So I don't want to pollute context when it isn't needed.