Reject distance sources without measured evidence

Reviewed-on: #400

cmd/core-runtime/main.go

@@ -811,9 +811,13 @@ func main() {
 						continue
 					}
 					learnedLexicon := interactiondomain.TaskLexiconFromHistory(conversationHistory)
-					searchQuery := interactiondomain.SearchQueryWithLexicon(part, learnedLexicon)
+					// Preserve the original utterance for semantic route compilation
+					// before removing a search imperative. Distance and route skills
+					// need the user's relation words (for example "до") to bind a
+					// remembered current location to the requested destination.
+					searchQuery := interactiondomain.TravelResearchQuery(part, conversationHistory, now)
+					searchQuery = interactiondomain.SearchQueryWithLexicon(searchQuery, learnedLexicon)
 					searchQuery = interactiondomain.TimeDifferenceResearchQuery(searchQuery)
-					searchQuery = interactiondomain.TravelResearchQuery(searchQuery, conversationHistory, now)
 					// The research capability may try its configured source and a
 					// source-recovery fallback. Its caller must leave enough budget for
 					// both attempts and evidence evaluation.
@@ -1843,6 +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
 	}
@@ -1872,6 +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) != ""
 }

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,
@@ -101,6 +113,15 @@ func TestResearchIdentifiersExcludeSearchDate(t *testing.T) {
 	}
 }
 
+func TestResearchQueryKeepsDistanceRelationBeforeSearchNormalization(t *testing.T) {
+	history := []interaction.HumanUtterance{{Content: "я сейчас в Москве"}}
+	query := interactiondomain.TravelResearchQuery("сколько километров до Сочи?", history, time.Time{})
+	query = interactiondomain.SearchQueryWithLexicon(query, interactiondomain.TaskLexicon{})
+	if query != "расстояние между Москве и Сочи в километрах по прямой и по дороге" {
+		t.Fatalf("distance query lost remembered origin: %q", query)
+	}
+}
+
 func TestResponseReviewPreservesAttemptedResearchOutcome(t *testing.T) {
 	if reviewMayReplacePlanningReply(false, false, true, false, "Уточните аэропорт.", "Пока не смог получить проверяемый ответ.") {
 		t.Fatal("review replaced an honest unbacked research outcome")