"""Astra's runnable example for the recovered Xi graph (2026-09-12)."""
from holographic import HolographicDAG

graph = HolographicDAG()
graph.add("source", {"kind": "capsule", "meaning": "An idea to carry"})
graph.add("revision", {"kind": "capsule", "meaning": "A useful change"})
graph.add("render", {"kind": "artifact", "meaning": "A shareable result"})
graph.link("source", "revision")
graph.link("revision", "render")
assert [n.id for n in graph.neighborhood("source")] == ["revision"]
assert [n.id for n in graph.neighborhood("revision")] == ["render"]
print("source -> revision -> render")
print("Three nodes, two directed links; originals remain distinct.")