Basis of Design

The one file that holds a project's settled design values as explicit numbers, the source of truth everything else builds from.

The single file holding a project's landed design decisions as explicit numeric parameters — the source of truth the tuners land into, the spikes validate against, and the implementation ports from Holds the frozen values at any moment (the living happens in the propagation ledger): the file itself is living — propagated with named-reason commits only — while each landed value is frozen until a propagation moves it

Generalizes past visual to any design parameter, interaction thresholds included Named from the AEC term of art; not a "register" (see architectural register).