Interfaces carry intent
Consumers know the outcome a capability supports, not only an endpoint shape.
Network keeps verified capability interfaces connected to the Journey Versions, evidence, outputs, and destinations that depend on them.

A capability change is not just a registry event. It has an owner, a visible path through the product, and traceable downstream consequences.
The owned outcome changes.
The evidence and decision are re-evaluated.
Explanations that used the change are identified.
Delivered work is marked current, refreshable, or stale.
Network turns a release change into a concrete impact list: what became stale, who owns the fix, and which destinations cannot be called current until the work is resolved.
Expose a verified Journey as an interface without losing the outcome, permission, side-effect, and evidence semantics that make it safe to use.
Consumers know the outcome a capability supports, not only an endpoint shape.
Signed access and subscriptions resolve against declared permissions and side effects.
Registry changes resolve back to the Journey Version and the evidence behind it.
Start with one maintained Journey, then trace the work that depends on its next version.