## Failure modes

- **Spec-sheet** — exhaustive mechanical detail that reads as defensive,
  dates badly, and is hard to skim.
- **Tautological** — just a wrapper around a ticket reference that doesn't
  actually brief anyone.
- **Temporal narrative** — anchors the rule to a transition ("previously…",
  "now that…", "since the migration…") instead of a standing fact. Rewrite
  as the property the code currently enforces.
- **Over-justifying** — escalating to the full Observation → Consequence →
  Response → Pointer shape for a constraint the reader could've inferred
  from a one-line label. The paragraph isn't wrong, it's just work the
  reader didn't need done for them.