2026-10-06 | O9X data/compliance architecture principle. Establish one canonical operational record in the form closest to how work is actually observed, then derive payroll, compliance, customer and management views downstream. When an error is found, correct the source record so every representation changes together. Statutory logic should be modelled as effective-dated/versioned rules rather than scattered conditions: separate the legal basis, employee state, wage definitions, eligibility and calculation. Consequential payroll/compliance decisions should remain deterministic and auditable even when AI is used around them.