Exclude dates from concrete research identifiers

cmd/core-runtime/main.go

@@ -1883,9 +1883,14 @@ func findingContainsRequestedIdentifier(query string, finding epistemics.Researc
 }
 
 func requestedResearchIdentifiers(query string) []string {
-	identifiers := regexp.MustCompile(`(?i)[a-z0-9][a-z0-9._-]{3,}`).FindAllString(query, -1)
-	exact := make([]string, 0, len(identifiers))
-	for _, identifier := range identifiers {
+	rawIdentifiers := regexp.MustCompile(`(?i)[a-z0-9][a-z0-9._-]{3,}`).FindAllString(query, -1)
+	identifiers := make([]string, 0, len(rawIdentifiers))
+	exact := make([]string, 0, len(rawIdentifiers))
+	for _, identifier := range rawIdentifiers {
+		if researchDateIdentifier(identifier) {
+			continue
+		}
+		identifiers = append(identifiers, identifier)
 		if strings.ContainsAny(identifier, "._-") || strings.IndexFunc(identifier, func(r rune) bool { return r >= '0' && r <= '9' }) >= 0 {
 			exact = append(exact, identifier)
 		}
@@ -1896,6 +1901,11 @@ func requestedResearchIdentifiers(query string) []string {
 	return identifiers
 }
 
+func researchDateIdentifier(value string) bool {
+	return regexp.MustCompile(`^\d{1,2}[.-]\d{1,2}[.-]\d{2,4}$`).MatchString(value) ||
+		regexp.MustCompile(`^\d{4}[.-]\d{1,2}[.-]\d{1,2}$`).MatchString(value)
+}
+
 // nearestFlightRouteTerms retains only the two endpoint-shaped terms from a
 // structured flight search. It has no city or provider vocabulary: endpoint
 // relevance is determined from the request itself.

cmd/core-runtime/main_test.go

@@ -94,6 +94,13 @@ func TestResearchReplyKeepsFindingContainingConcreteIdentifier(t *testing.T) {
 	}
 }
 
+func TestResearchIdentifiersExcludeSearchDate(t *testing.T) {
+	identifiers := requestedResearchIdentifiers("ближайший поезд в Петербург сегодня 26.08.2026")
+	if len(identifiers) != 0 {
+		t.Fatalf("search date was treated as a concrete identifier: %#v", identifiers)
+	}
+}
+
 func TestResponseReviewPreservesAttemptedResearchOutcome(t *testing.T) {
 	if reviewMayReplacePlanningReply(false, true, false, "Уточните аэропорт.", "Пока не смог получить проверяемый ответ.") {
 		t.Fatal("review replaced an honest unbacked research outcome")