diff --git a/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/judge_test.go b/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/judge_test.go
index dd5a7abd..14d3f199 100644
--- a/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/judge_test.go
+++ b/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/judge_test.go
@@ -158,6 +158,10 @@ func TestThePublishedVersionsAreTheIndexersPackagesState(t *testing.T) {
 	if got := p.LatestPackages(); len(got) != 1 || got[sdk] == "" {
 		t.Errorf("after a delete: %v", got)
 	}
+	// Issue 1966: a module record names its module, with no series to say it, and none of the packages inside it.
+	if got := p.PackageNames(); !reflect.DeepEqual(got, map[string]string{sdk: ""}) {
+		t.Errorf("the known packages from a module record = %v", got)
+	}
 	// A series key names its package by its ecosystem name, the judge's known packages (DLV-I14, design 32), and is no
 	// module's published version.
 	now := time.Now().UTC()
diff --git a/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/packages.go b/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/packages.go
index 19b4118c..62b01d53 100644
--- a/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/packages.go
+++ b/modules/mesh-delivery-checker/cmd/mesh-delivery-checker/packages.go
@@ -78,7 +78,9 @@ func (p *publishedPackages) LatestPackages() buildstep.PackageVersions {
 	return out
 }
 
-// PackageNames are the packages the state's series keys name, by the name in its own ecosystem: the `<module>/<artifact>`
+// PackageNames are the packages the state's series keys name, and the Go module path of each per-module record (issue
+// 1966: the indexer's own knownPackages counts them the same way, with no `<module>/<artifact>` to say; never a package
+// inside a module, design 32), by the name in its own ecosystem: the `<module>/<artifact>`
 // each is built from (empty when the key does not say). Nil while the state is not read yet (Answered), which judges no
 // name; once read never nil, an empty state included, so the judge judges every name against it.
 func (p *publishedPackages) PackageNames() map[string]string {
@@ -93,6 +95,11 @@ func (p *publishedPackages) PackageNames() map[string]string {
 			out[s.Name] = s.Package
 		}
 	}
+	for _, v := range p.byKey {
+		if _, ok := out[v.Module]; !ok && v.Module != "" {
+			out[v.Module] = ""
+		}
+	}
 	return out
 }
 
diff --git a/modules/mesh-delivery-indexer/internal/index/control_records_test.go b/modules/mesh-delivery-indexer/internal/index/control_records_test.go
index 3c77f41a..f625affa 100644
--- a/modules/mesh-delivery-indexer/internal/index/control_records_test.go
+++ b/modules/mesh-delivery-indexer/internal/index/control_records_test.go
@@ -440,6 +440,19 @@ func TestTheControlRecords(t *testing.T) {
 		if known := ix.knownPackages(ctx); len(known) != 2 || !known[sdkGo] || !known["@novox/mesh-sdk"] {
 			t.Errorf("the judge's known packages = %v", known)
 		}
+		// Issue 1966: a Go module the trunk holds a per-module record of is known by its module path, though no series
+		// names it; a package inside it is not (design 32).
+		resticMod, at := "git.novox.be/novox/mesh-delivery/modules/restic", time.Unix(1, 0)
+		rec, err := EncodePublishedPackages(meshcatalog.PackagesByModuleValue{Module: resticMod, Repository: "novox/mesh-delivery", Dir: "modules/restic", At: &at,
+			Commit: strings.Repeat("a", 40), Requires: "h1:r", Packages: []meshcatalog.PackagesByModuleValuePackagesItem{{Package: resticMod + "/backupgood", Digest: "h1:a"}}})
+		if err != nil {
+			t.Fatal(err)
+		}
+		ix.Packages.(*memStore).vals["restic"] = rec
+		if known := ix.knownPackages(ctx); len(known) != 3 || !known[resticMod] || known[resticMod+"/backupgood"] || !known[sdkGo] || known["restic/go"] || known["unknown/pkg"] {
+			t.Errorf("the judge's known packages with a module record = %v", known)
+		}
+		delete(ix.Packages.(*memStore).vals, "restic")
 		delete(ix.Packages.(*memStore).vals, SeriesKey("@novox/mesh-sdk", "0.3"))
 		for _, h := range []HeardVersion{
 			{Package: sdkGo, Seat: "go-package-registry", Version: "0.1.15", Commit: "c15"},
diff --git a/modules/mesh-delivery-indexer/internal/index/verdicts.go b/modules/mesh-delivery-indexer/internal/index/verdicts.go
index 18f9f444..75bdf287 100644
--- a/modules/mesh-delivery-indexer/internal/index/verdicts.go
+++ b/modules/mesh-delivery-indexer/internal/index/verdicts.go
@@ -362,8 +362,10 @@ func namesAtMerge(module string, raw []byte, atMerge bool, known judge.KnownPack
 }
 
 // knownPackages are the packages a manifest's `packages` may name (DLV-I14, design 32): every name the packages state's
-// series keys hold, as KeepPackageNames reads it at each merge. Nil, which judges no name, where the indexer keeps no
-// packages state or it cannot be listed (said): a state the judge cannot read refuses no manifest.
+// series keys hold, as KeepPackageNames reads it at each merge, and the Go module path of every per-module record the
+// state holds from the trunk: while no build module builds Go package artifacts, a Go module the trunk holds a record of
+// has no series and is known by its module path, never by a package inside it (design 32; issue 1966). Nil, which judges
+// no name, where the indexer keeps no packages state or it cannot be listed (said): a state the judge cannot read refuses no manifest.
 func (ix *Indexer) knownPackages(ctx context.Context) judge.KnownPackages {
 	if ix.Packages == nil {
 		return nil
@@ -375,14 +377,17 @@ func (ix *Indexer) knownPackages(ctx context.Context) judge.KnownPackages {
 	}
 	known := judge.KnownPackages{}
 	for _, key := range keys {
-		if !IsSeriesKey(key) {
-			continue
-		}
 		value, _, found, err := ix.Packages.Get(ctx, key)
 		if err != nil {
 			ix.logf("judge: packages.%s cannot be read, so the names of packages are not judged: %v", key, err)
 			return nil
 		}
+		if !IsSeriesKey(key) {
+			if r, err := DecodePublishedPackages(value); found && err == nil && r.Module != "" {
+				known[r.Module] = true
+			}
+			continue
+		}
 		if s, err := DecodeSeriesPackage(value); found && err == nil {
 			known[s.Name] = true
 		}
diff --git a/modules/mesh-delivery-indexer/judge/packages.go b/modules/mesh-delivery-indexer/judge/packages.go
index 69cc60bb..4c8fd42e 100644
--- a/modules/mesh-delivery-indexer/judge/packages.go
+++ b/modules/mesh-delivery-indexer/judge/packages.go
@@ -12,7 +12,9 @@ import (
 // KnownPackages are the names of the packages the mesh knows, each by its name in its own ecosystem (design 32: a Go
 // package's go.mod module path, a TypeScript package's package.json name): the names the indexer's packages state holds
 // (its series keys, index.SeriesPackage's Name), read at each trunk merge, and, at the merge check, the names a member
-// of the change's delivery group names at its head for a package new in the group. Both read a name with mesh-delivery's
+// of the change's delivery group names at its head for a package new in the group, and the Go module path of each
+// per-module record the state holds: a Go module the trunk holds a record of is known while no build module builds Go
+// package artifacts (issue 1966), never a package inside it. Both read a name with mesh-delivery's
 // sdk/packagename. Nil is no list at hand: the names are then not judged, only their series.
 type KnownPackages map[string]bool