Branch a Session
Domain: Sessions & Persistence
Motivation
A branch is one of several sessions that descend from a common parent, each carrying the shared prefix plus its own divergent events. The query service exposes the relationship explicitly so a deployment can see where a session came from and what it spawned. This is the persistent form of exploration: try two directions from the same point.
Concrete Example
ctx.sessionQuery.traceSession(id) returns the known ancestor chain and recursive descendant trees for a session.
Analogy
Two lanes of a highway that split from the same overpass.