diff --git a/contracts/go/seats/meshcatalog/contract.go b/contracts/go/seats/meshcatalog/contract.go
index 1a6b43f6..a2ada753 100644
--- a/contracts/go/seats/meshcatalog/contract.go
+++ b/contracts/go/seats/meshcatalog/contract.go
@@ -736,6 +736,8 @@ type CatalogEntry struct {
 	Main string `json:"main,omitempty"`
 	// the validated manifest whole, kept as an object by the entry's digest, so no size limit applies; read by anyone but the indexer through the entry, never as a manifest (design 47 G section 443, section 442)
 	Manifest map[string]any `json:"manifest"`
+	// TEMPORARY local field: the digest of the manifest's bytes as the forge answered them (design 47 G section 506)
+	ManifestDigest string `json:"manifest-digest,omitempty"`
 	Module   string         `json:"module"`
 	// the manifest reads a node-engine must state to compose it, its templates' forms included, as the forge bridge read them at the merge (ADR 0614 §4, ADR 0632 §2)
 	Needs []string `json:"needs,omitempty"`