specKit workflow spanning multiple related Repos

[mprabhanjan]

Hi experts,

Currently what is the recommendation / best-practices for running a specKit workflow on multiple repos that are tied together?
Ex: I've one repo that has all mgmt+control plane code(r1); a second repo that has code for DataPlane(r2); and 3rd repo (r3) that contains all integration test-suites, spanning both the r1 & r2 repos.

I'm looking for a way to run a single specKit workflow that can look at both r1 & r2 when generating the spec.md, plan.md, etc, and during speckit-implementation can generate code in both r1 & r2, and can generate test-suites in r3.

What's the best way to accomplish the above?
Thanks