diff --git a/go.mod b/go.mod
index 3cb48cc..410da9b 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/novox/mesh-host
 go 1.26.0
 
 require (
-	git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261103131008-e7ce86ff62b5
+	git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261103152334-65b7adc8bdd9
 	github.com/nats-io/nats-server/v2 v2.11.17
 	github.com/nats-io/nats.go v1.54.0
 	golang.org/x/crypto v0.57.0
diff --git a/go.sum b/go.sum
index 310e531..c1f0628 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,5 @@
-git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261103131008-e7ce86ff62b5 h1:snMd7KsMT+tKlWYtrXSXrHF4u60DElvHmbe/aq58DqU=
-git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261103131008-e7ce86ff62b5/go.mod h1:ouERNpZizzwZ0HLEtAypsY9FR20FyUgUYRni6J7kVCY=
+git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261103152334-65b7adc8bdd9 h1:XJ7L9ZZ26URj0WxT467I9xZXijKDlQ5ZfE9NK/SnV0Y=
+git.novox.be/novox/mesh-sdk/go v0.1.14-0.20261103152334-65b7adc8bdd9/go.mod h1:ouERNpZizzwZ0HLEtAypsY9FR20FyUgUYRni6J7kVCY=
 github.com/antithesishq/antithesis-sdk-go v0.7.0-default-no-op h1:Z/MZK75wC/NSrkgqeNIa7jexam9uWzhLmFTSCPI/kn0=
 github.com/antithesishq/antithesis-sdk-go v0.7.0-default-no-op/go.mod h1:FQyySiasQQM8735Ddel3MRojmy4dA1IqCeyJ5jmPMbI=
 github.com/google/go-tpm v0.9.8 h1:slArAR9Ft+1ybZu0lBwpSmpwhRXaa85hWtMinMyRAWo=
diff --git a/internal/compose/resolution/seats.go b/internal/compose/resolution/seats.go
index 85b5015..5e1beb8 100644
--- a/internal/compose/resolution/seats.go
+++ b/internal/compose/resolution/seats.go
@@ -193,7 +193,8 @@ var defaultSeats = append([]mcat.Seat{
 	// images and archives, by digest — which is why the provision is the artifact store and not an
 	// image registry.
 	{Name: "mesh-artifact-store", Scope: mcat.ScopeMesh, Delivers: "artifact-store", Decision: "novox/hq ADR 0075"},
-	{Name: "mesh-catalog", Scope: mcat.ScopeMesh, Decision: "novox/hq ADR 0121"},
+	// The catalog (novox/hq ADR 0604): the SDK's entry with its four verbs, so the copies of the table agree.
+	sdkSeat(mcat.CatalogSeat),
 	// The delivery's owner (novox/hq ADR 0239): one commit's journey from its pull request's head to every
 	// machine, and a group of them, recorded and ordered by its holder, which asks the controller for each act.
 	// What it says it says as its module (`mesh-delivery.transition`), through the runtime that launches it.
@@ -649,3 +650,12 @@ func vaultIntake(first map[string]string) map[string]string {
 	}
 	return out
 }
+
+// sdkSeat is the SDK's entry for a seat, taken whole, so this copy of the table cannot disagree with it.
+func sdkSeat(name string) mcat.Seat {
+	seat, ok := mcat.SeatNamed(name)
+	if !ok {
+		panic("the SDK's seat table holds no seat " + name)
+	}
+	return seat
+}
diff --git a/internal/compose/resolution/seats_test.go b/internal/compose/resolution/seats_test.go
index 8c3cdd5..bcbac2c 100644
--- a/internal/compose/resolution/seats_test.go
+++ b/internal/compose/resolution/seats_test.go
@@ -1,6 +1,7 @@
 package resolution
 
 import (
+	"reflect"
 	"strings"
 	"testing"
 
@@ -69,4 +70,23 @@ func TestTheHolderIsTheModuleNotTheMachine(t *testing.T) {
 	if !held || holder.Module != "gitea" {
 		t.Fatalf("the holder was not told apart from a neighbour: %+v", holder)
 	}
+
+	// ADR 0604 section 1, F3: the seat table written here answers as the SDK's does for the catalog seat, its four
+	// verbs included, so no two copies of the table disagree.
+	want, ok := mcat.SeatNamed(mcat.CatalogSeat)
+	if !ok {
+		t.Fatal("the SDK holds no catalog seat")
+	}
+	var have *mcat.Seat
+	for i := range defaultSeats {
+		if defaultSeats[i].Name == mcat.CatalogSeat {
+			have = &defaultSeats[i]
+		}
+	}
+	if have == nil {
+		t.Fatal("the table here holds no catalog seat")
+	}
+	if !reflect.DeepEqual(*have, want) {
+		t.Errorf("the table here has %+v, the SDK's is %+v", *have, want)
+	}
 }