@connections

@connections(S) accumulates -> connection statements on a field, turning each into a record of the connection schema S. This is how graph-shaped blocks (flowcharts, state machines) collect their edges declaratively.

@block("graph") type Graph {
  @connections(Edge) edges: list<Edge>
}

type Edge {
  from: identifier
  to:   identifier
}

graph flow {
  a -> b
  b -> c
}