Carry affiliations through a unit merge
What It Does
A Structure unit merge calls Membership to preserve member connections. The plan chooses transfers, future re-pointings, overlap closures and identity-unit moves before committing the merge.
The Flow
When Something Fails
An invalid plan rejects the merge before writes, and later failures roll back all effects. Successful merges can lose primary designation. Only the transfer branch publishes separate affiliation events.
Open Design Questions
Decide preservation of primary designation and whether every merge branch needs a partner event.