At Atlassian part of my work was aligning Rovo with Google's Gemini framework. Integrating your AI roadmap with another company's is one of the harder program problems, because you control half the variables and have to influence the other half across an org boundary you don't sit inside.
The first reality is that the partner has their own roadmap, their own priorities, and their own clock, none of which bend to your deadline by default. You can't manage their teams. You can only make it easy for them to say yes and hard for a dependency to silently slip.
So the work becomes interface management. Define exactly what each side owns, what each side needs from the other, and by when, in terms both orgs accept. Ambiguity at the boundary is where partner programs die, because each side assumes the other has it.
The second reality is that frameworks move under you. An AI platform on the other side ships changes on its own schedule, and your integration has to absorb that without breaking. I planned for the interface to change, not to hold still, which is the only safe assumption when half the system isn't yours.