G.13:14 - Author’s quick checklist (informative)

1. Register each external source snapshot as an ExternalIndexCard@Context with explicit ExternalEdition.
2. Author a ClaimMapperCard@Context with explicit MappingPolicyRef and required edition pins.
3. If you derive SoS features, declare a SoSFeatureTransform@Context and cite CHR typing refs and provenance hooks.
4. Publish an InteropSurface@Context that cites all active …Ref.edition values and UTS rows.
5. On any external edition or policy change, emit canonical RSCR trigger causes with explicit scope + payload pins.
6. Keep provider/tool specifics in Extensions (or Phase‑3 seed) and do not let formats redefine semantics.