A single semantic-core-v1 manifest (a discrete SIR contagion
on a two-community contact graph, as ⟨State, Topology, Rule,
Schedule⟩ data) advanced by the same modality-free stepper that runs
Game of Life, the L-system and the ecosystem. Here the topology is a
graph: a node's neighbours are whoever it is wired to,
not whoever sits nearby — so the outbreak sweeps one community and then
crosses the single bridge. The node-link diagram you see and the chord you
hear are the same field — neither modality rewrites it. The status line
shows the program's expressiveness tier, read from its axes by the shared
classifier.