validation_tests:
  - id: "tag_mapping_complete"
    description: "All required model input tags are mapped to real source tags."
  - id: "units_consistent"
    description: "Units match model contract expectations."
  - id: "approval_required"
    description: "Recommendation workflow includes human approval."
  - id: "read_only_advisory"
    description: "Package does not require PLC/DCS write-back."