Dataflow Model

Rellum programs are graphs.

Events enter the graph, state advances deterministically, derived values are recomputed, and effects run after state is committed.

press = event(button!())

count ~ feedback(
    on press => count + 1,
    0
)

message = "value: " + to_string(count)

main! on any => print!(message)

Why This Matters

• The compiler can see dependencies between values.
• Independent work can run in parallel.
• Effects happen at clear boundaries.
• State changes are deterministic.