Semantic / KPI drift checks

Check types

Typed checks run through POST /api/v1/checks/execute. Failures revoke Passports and feed AI explanations.

• kpi_baseline — metric vs rolling baseline with tolerance_pct / tolerance_abs
• row_count_drift — count vs prior passing runs
• distribution_drift — null %, uniqueness, optional mean band

Example

- id: chk_kpi_revenue
  type: kpi_baseline
  target: mart_executive_kpis
  metric_column: revenue
  baseline_window: 7
  tolerance_pct: 15