Sequential Time Theory: Metrological Completion of Relativity

Sequential Time Theory (STT) defines time as a metrological quantity realized by operational procedures (record, count, resolution) rather than as a coordinate axis. Starting from the primitive definition Δτ(n)=n k ΔQ_unit, STT internalizes time metrology (L2) and treats spacetime geometry (L1) as a representation of protocol constraints, rendering block-universe interpretations optional rather than required for derivations. Physics is reframed as STT-Core + Bridge axioms + Θ_sys, where Θ_sys is an explicit, auditable bundle of system-specific auxiliary assumptions. Within this scheme, SR/GR arise as representation theorems for defect-free/defect-bearing clock networks, QM interference is treated as measurable U(1) phase holonomy, Gaussian diffusion is derived from minimal sequential assumptions, and quantum-gravity routes are compared by Θ-auditing.