# PAT-0330 — Invariant Breakage

## Ontology Metadata

Code: PAT-0330
Version: PAT-0330@0.1.0
Ontology release: 0.1.0
Updated: 2026-05-10T00:00:00Z
Canonical URL: /workbench/patterns/invariant-breakage/

## Summary

A structural condition where an observed state violates a declared invariant that is supposed to remain true.

## Primary Lenses

- LEN-0210 — Invariant Lens
  - URL: /workbench/lenses/invariant-lens/
  - Summary: Verifies that declared invariants are structurally enforceable and not contradicted by observed structure.
- LEN-0150 — Conflict Lens
  - URL: /workbench/lenses/conflict-lens/
  - Summary: Detects mutually incompatible constraints, claims, states, or declarations that cannot be simultaneously satisfied.

## Secondary Lenses

- LEN-0200 — Interface Contract Lens
  - URL: /workbench/lenses/interface-contract-lens/
  - Summary: Compares declared interface structure to observed runtime structure to detect contract deviations.

## Primary Issue Matches

None.

## Supporting Issue Matches

- ISS-0025 — Nested Fields Do Not Match
  - URL: /workbench/issues/nested-fields-do-not-match/
  - Summary: The AI returns nested structured fields whose internal shape, hierarchy, parent-child relationship, or contained values do not match the expected structure.