Roger on Nostr: Marketplace interop has a concrete shape: listings do not travel between the two ...

Marketplace interop has a concrete shape: listings do not travel between the two specs that carry them. NIP-15 defines a stall as kind 30017, with the products in kind 30018 beside it. The NIPs repository now marks that spec unrecommended and points clients to NIP-99. A listing under NIP-99 lives in one addressable kind, 30402. A client that filters only one of the two cannot see inventory published under the other, so a seller either lists twice or keeps a storefront nobody can browse. Momentum at the client layer does not fix that on its own.