## Spec Diff Decision

{{covered | extension | conflict}}, {{one-line justification}}

## Evidence

- `{{spec-path.md}}`: {{cited AC id / passage / "no AC matches"}}

## Implication

- {{covered}}: proceed with the existing spec; cite which AC authorizes the work.
- {{extension}}: {{smallest spec delta needed, new AC ids, modified pre/post conditions}}.
- {{conflict}}: stop. The request contradicts {{cited AC}}; product decision required before any implementation.