Add Notarius configuration and extraction source policy

internal/artifacts/artifact_resolver.go

@@ -144,6 +144,22 @@ func ConfiguredArtifactName(source string) (string, bool) {
 	return artifactpolicy.ParseConfiguredSource(source)
 }
 
+// ExtractionArtifactSourceID returns narratio.extraction.<name> for a configured key.
+func ExtractionArtifactSourceID(key string) string {
+	return artifactpolicy.ExtractionSourceID(key)
+}
+
+// IsExtractionArtifactSource reports whether source is narratio.extraction.<name>.
+func IsExtractionArtifactSource(source string) bool {
+	_, ok := artifactpolicy.ParseExtractionSource(source)
+	return ok
+}
+
+// ExtractionArtifactName extracts <name> from narratio.extraction.<name>.
+func ExtractionArtifactName(source string) (string, bool) {
+	return artifactpolicy.ParseExtractionSource(source)
+}
+
 // IsPreviousSessionArtifactSource returns true when source is narratio.previous_session.artifact.<name>.
 func IsPreviousSessionArtifactSource(source string) bool {
 	_, ok := artifactpolicy.ParsePreviousSessionSource(source)

internal/artifacts/artifact_resolver_test.go

@@ -150,6 +150,23 @@ func TestPreviousSessionArtifactSourceHelpers(t *testing.T) {
 	}
 }
 
+func TestExtractionArtifactSourceHelpers(t *testing.T) {
+	if got := ExtractionArtifactSourceID("npc_registry"); got != "narratio.extraction.npc_registry" {
+		t.Fatalf("ExtractionArtifactSourceID() = %q", got)
+	}
+	if !IsExtractionArtifactSource(" narratio.extraction.npc_registry ") {
+		t.Fatal("IsExtractionArtifactSource(valid) = false")
+	}
+	if key, ok := ExtractionArtifactName("narratio.extraction.npc_registry"); !ok || key != "npc_registry" {
+		t.Fatalf("ExtractionArtifactName() = %q, %t", key, ok)
+	}
+	for _, source := range []string{"narratio.extraction.", "narratio.extraction.npc-registry", "narratio.artifact.npc_registry"} {
+		if IsExtractionArtifactSource(source) {
+			t.Fatalf("IsExtractionArtifactSource(%q) = true, want false", source)
+		}
+	}
+}
+
 func TestResolveSessionArtifactPrefersManifestOutput(t *testing.T) {
 	workspace := t.TempDir()
 	paths := buildSessionPaths(workspace, "campaign", "session")