From 75a853393907209ca3e6ccf5a122fcc6d2d65e7b Mon Sep 17 00:00:00 2001
From: Mikhail <misha_mst@mail.ru>
Date: Wed, 26 Aug 2026 09:47:49 +0300
Subject: [PATCH] Reject distance sources without measured evidence

---
 cmd/core-runtime/main.go      | 12 ++++++++++++
 cmd/core-runtime/main_test.go | 12 ++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/cmd/core-runtime/main.go b/cmd/core-runtime/main.go
index 6ab33f3..3b32028 100644
--- a/cmd/core-runtime/main.go
+++ b/cmd/core-runtime/main.go
@@ -1847,6 +1847,9 @@ func researchFindingMatchesIntent(query string, finding epistemics.ResearchFindi
 	if ticketSearchQuery(query) && !ticketFindingMatchesDestination(query, finding) {
 		return false
 	}
+	if distanceResearchQuery(query) && !containsDistanceEvidence(finding.Excerpt.Text) {
+		return false
+	}
 	if !nearestFlightQuery(query) {
 		return true
 	}
@@ -1876,6 +1879,15 @@ func researchFindingMatchesIntent(query string, finding epistemics.ResearchFindi
 	return true
 }
 
+func distanceResearchQuery(query string) bool {
+	lower := strings.ToLower(query)
+	return strings.Contains(lower, "расстоян") || strings.Contains(lower, "километр")
+}
+
+func containsDistanceEvidence(value string) bool {
+	return regexp.MustCompile(`(?i)\b\d[\d\s]*\s*(?:км|километр)`).MatchString(value)
+}
+
 func ticketSearchQuery(query string) bool {
 	return interactiondomain.TicketSearchDestination(query) != ""
 }
diff --git a/cmd/core-runtime/main_test.go b/cmd/core-runtime/main_test.go
index 2c74324..a0764d5 100644
--- a/cmd/core-runtime/main_test.go
+++ b/cmd/core-runtime/main_test.go
@@ -70,6 +70,18 @@ func TestTicketReplyRejectsGenericCategoryPageWithoutDestination(t *testing.T) {
 	}
 }
 
+func TestDistanceReplyRejectsCalculatorPageWithoutDistance(t *testing.T) {
+	query := "расстояние между Москве и Сочи в километрах по прямой и по дороге"
+	calculator := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Расчет расстояний"}, Excerpt: epistemics.SourceExcerpt{Text: "Калькулятор рассчитывает точное расстояние между городами."}}
+	if researchFindingMatchesIntent(query, calculator) {
+		t.Fatal("distance calculator landing page was presented without a measured distance")
+	}
+	measured := epistemics.ResearchFinding{Source: epistemics.Source{Title: "Маршрут"}, Excerpt: epistemics.SourceExcerpt{Text: "Расстояние по дороге составляет 1 620 км."}}
+	if !researchFindingMatchesIntent(query, measured) {
+		t.Fatal("measured distance evidence was rejected")
+	}
+}
+
 func TestResearchReplyRejectsGenericLandingPageForConcreteIdentifier(t *testing.T) {
 	result := epistemics.ResearchResult{Findings: []epistemics.ResearchFinding{{
 		State:   epistemics.FindingSupported,
-- 
2.54.0