Keep source names out of identifier clarification

cmd/core-runtime/main.go

@@ -1866,7 +1866,17 @@ func findingContainsRequestedIdentifier(query string, finding epistemics.Researc
 }
 
 func requestedResearchIdentifiers(query string) []string {
-	return regexp.MustCompile(`(?i)[a-z0-9][a-z0-9._-]{3,}`).FindAllString(query, -1)
+	identifiers := regexp.MustCompile(`(?i)[a-z0-9][a-z0-9._-]{3,}`).FindAllString(query, -1)
+	exact := make([]string, 0, len(identifiers))
+	for _, identifier := range identifiers {
+		if strings.ContainsAny(identifier, "._-") || strings.IndexFunc(identifier, func(r rune) bool { return r >= '0' && r <= '9' }) >= 0 {
+			exact = append(exact, identifier)
+		}
+	}
+	if len(exact) > 0 {
+		return exact
+	}
+	return identifiers
 }
 
 // nearestFlightRouteTerms retains only the two endpoint-shaped terms from a

cmd/core-runtime/main_test.go

@@ -65,7 +65,7 @@ func TestResearchReplyRejectsGenericLandingPageForConcreteIdentifier(t *testing.
 		Excerpt: epistemics.SourceExcerpt{Text: "Широкий ассортимент товаров и услуг."},
 	}}}
 	reply, backed := renderResearchReply("на WB бренд marka-wear", result, nil)
-	if backed || !strings.Contains(reply, "marka-wear") || !strings.Contains(reply, "уточните написание") {
+	if backed || !strings.Contains(reply, "marka-wear") || strings.Contains(reply, "wildberries") || !strings.Contains(reply, "уточните написание") {
 		t.Fatalf("generic page was presented as a brand result: %q", reply)
 	}
 }