Archeon Global wants engineering calculations to carry their own evidence

Field notes

TankLogic organizes storage-tank design as a dependency graph rather than a chain of retyped spreadsheet hand-offs. The homepage names twelve modules spanning shell, roof, foundation, wind, seismic, anchorage, and floating roofs, and says freshness is recomputed from content hashes at read time. It also describes provenance attached to each value, including the implemented formula, substituted inputs, cited clause, and engine version. Pressure-vessel and piping engines are presented as planned extensions of the same architecture.