diff --git a/go/catalogue/manifest.go b/go/catalogue/manifest.go
index 5d501f99..38c08f1f 100644
--- a/go/catalogue/manifest.go
+++ b/go/catalogue/manifest.go
@@ -1246,6 +1246,12 @@ type Artifact struct {
 	// release keeps a manifest that names them whole (design 47 G §340, §409); the manifest validator checks their form.
 	Needs []string `json:"needs,omitempty"`
 
+	// Calls are the capability words (design 47 G §488, §605) a package's code calls of the tool runner: the delivery plan
+	// derives, for each module whose build resolved a version of such a package, an ordering edge to the tool runner stating
+	// those words on each node, so no manifest names the tool runner's module. Said on a package only; the manifest
+	// validator checks their form.
+	Calls []string `json:"calls,omitempty"`
+
 	// GeneratedFrom marks a package of a contracts module (novox/hq ADR 0608 §5, design 26 *Contracts modules*): the
 	// directory, relative to the module's, of the seat definitions every file of the package is generated from. A
 	// module carrying it holds contracts only and claims no seat, which the judge refuses naming the seat; the build
diff --git a/go/catalogue/reader_release_test.go b/go/catalogue/reader_release_test.go
index 43cdf359..fccd9ba5 100644
--- a/go/catalogue/reader_release_test.go
+++ b/go/catalogue/reader_release_test.go
@@ -9,7 +9,8 @@ func TestTheReaderReleaseReadsTheManifestWordsGWrites(t *testing.T) {
 	m, err := decodeForTest([]byte(`{"module":"mesh-watcher","version":"1.4","needs-approval":["restart","node-engine.composition","finding-written"],` +
 		`"consumes":["*.finding-written","mesh-conditions.findings-asked"],` +
 		`"streams":[{"name":"mesh-watcher-findings","events":["finding-written","finding-cleared","findings-stated"],"max-age-days":7,"max-mib":16}],` +
-		`"build":{"artifacts":[{"name":"program","kind":"bundle","language":"go","needs":["mesh-grants:program","node-tools:runtime"]}]}}`))
+		`"build":{"artifacts":[{"name":"program","kind":"bundle","language":"go","needs":["mesh-grants:program","node-tools:runtime"]},` +
+		`{"name":"go","kind":"package","language":"go","calls":["put-sessions","finding-calls"]}]}}`))
 	if err != nil {
 		t.Fatalf("a manifest with G's words was refused: %v", err)
 	}
@@ -17,7 +18,8 @@ func TestTheReaderReleaseReadsTheManifestWordsGWrites(t *testing.T) {
 		t.Fatalf("a word was set aside: %v (needs-approval %v)", m.UnknownField(), m.NeedsApproval)
 	}
 	if m.Version != "1.4" || m.Consumes[0] != "*.finding-written" || m.Streams[0].Name != "mesh-watcher-findings" ||
-		len(m.Build.Artifacts[0].Needs) != 2 || m.Build.Artifacts[0].Needs[0] != "mesh-grants:program" {
+		len(m.Build.Artifacts[0].Needs) != 2 || m.Build.Artifacts[0].Needs[0] != "mesh-grants:program" ||
+		len(m.Build.Artifacts[1].Calls) != 2 || m.Build.Artifacts[1].Calls[0] != "put-sessions" {
 		t.Fatalf("read as %+v", m)
 	}
 }
diff --git a/module.json b/module.json
index 489f5b32..3aa807ff 100644
--- a/module.json
+++ b/module.json
@@ -4,8 +4,8 @@
   "slug": "sdk",
   "build": {
     "artifacts": [
-      { "name": "lib", "kind": "package", "language": "typescript" },
-      { "name": "go", "kind": "package", "language": "go", "paths": ["go"] }
+      { "name": "lib", "kind": "package", "language": "typescript", "calls": ["finding-calls"] },
+      { "name": "go", "kind": "package", "language": "go", "paths": ["go"], "calls": ["finding-calls", "ledger-upkeep-calls", "put-sessions", "sent-objects-calls"] }
     ]
   },
   "resources": []