diff --git a/cmd/cognitive-worker/interpretation_live_trace_test.go b/cmd/cognitive-worker/interpretation_live_trace_test.go
index d4fdf5a..bb0bc9b 100644
--- a/cmd/cognitive-worker/interpretation_live_trace_test.go
+++ b/cmd/cognitive-worker/interpretation_live_trace_test.go
@@ -78,8 +78,12 @@ func TestLiveInterpretationTrace(t *testing.T) {
 	for _, message := range []string{
 		"расскажи как это работает",
 		"Расскажи, как это работает?",
+		"Расскажи как это работает",
 		"можешь объяснить почему база растёт",
 		"почему postgres использует столько памяти",
+		"ПОЧЕМУ postgres использует так много памяти",
+		"домовой не видит ии",
+		"домовой не вижит ии",
 		"разберись почему сервис упал",
 		"посмотри что произошло",
 		"исправь ошибку если найдёшь",
@@ -277,4 +281,4 @@ func cognitiveCandidateFromGateway(utteranceID interaction.HumanUtteranceID, can
 		CapabilityHints:      capabilityHints,
 		RecordedAtUnixMillis: now.UnixMilli(),
 	}, nil
-}
\ No newline at end of file
+}
diff --git a/modules/interaction/domain/semantics_test.go b/modules/interaction/domain/semantics_test.go
index a13dd27..877579e 100644
--- a/modules/interaction/domain/semantics_test.go
+++ b/modules/interaction/domain/semantics_test.go
@@ -8,6 +8,7 @@ import (
 	"git.cin.su/m/Assistant/contracts/identity"
 	"git.cin.su/m/Assistant/contracts/interaction"
 	"git.cin.su/m/Assistant/contracts/situation"
+	"git.cin.su/m/Assistant/platform/ids"
 )
 
 func TestInterpretUtteranceRecordsExplicitProjectFocus(t *testing.T) {
@@ -136,6 +137,7 @@ func TestInterpretUtteranceNaturalRussianHelpflowUsesContextAwareCognitionInput(
 		{message: "нет не UPO а UPO2 и обнови конфиг", wantSpeech: "", wantCognition: true, allowNoMatch: true},
 		{message: "postgres сейчас работает", wantSpeech: "", wantCognition: true, allowNoMatch: true},
 		{message: "сейчас домовой не видит ии", wantSpeech: "", wantCognition: true, allowNoMatch: true},
+		{message: "домовой не видит ии", wantSpeech: "", wantCognition: true, allowNoMatch: true},
 		{message: "основная база называется UPO", wantSpeech: interaction.SpeechActAssertion, wantCognition: false},
 		{message: "привет", wantSpeech: interaction.SpeechActConversational, wantCognition: false},
 		{message: "спасибо", wantSpeech: interaction.SpeechActConversational, wantCognition: false},
@@ -151,6 +153,7 @@ func TestInterpretUtteranceNaturalRussianHelpflowUsesContextAwareCognitionInput(
 		{message: "домовой не отвечает мне", wantSpeech: "", wantCognition: true, allowNoMatch: true},
 		{message: "домовой не слушает меня", wantSpeech: "", wantCognition: true, allowNoMatch: true},
 		{message: "домовой не отвечает на команды", wantSpeech: "", wantCognition: true, allowNoMatch: true},
+		{message: "ПОЧЕМУ postgres использует так много памяти", wantSpeech: "", wantCognition: true, allowNoMatch: true},
 	}
 	for _, tc := range cases {
 		result := interpretForTest(t, tc.message, nil, "")
@@ -169,6 +172,70 @@ func TestInterpretUtteranceNaturalRussianHelpflowUsesContextAwareCognitionInput(
 	}
 }
 
+func TestInterpretUtteranceDiagnosticTraceLineage(t *testing.T) {
+	message := "ты кто"
+	conversation := interaction.Conversation{ID: "conversation-1", ActorID: "actor-1", PrincipalID: "principal-1", Channel: interaction.ChannelWebChat, State: interaction.ConversationOpen}
+	utterance, _, _, err := NewHumanUtterance(conversation, interaction.ChatMessageRequest{Message: message}, time.Unix(100, 0))
+	if err != nil {
+		t.Fatal(err)
+	}
+	result, err := InterpretUtterance(utterance, projectRegistryForTest(), nil, time.Unix(100, 0))
+	if err != nil {
+		t.Fatal(err)
+	}
+	candidateID, err := ids.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	cognitiveCandidate := interaction.SemanticCandidate{
+		ID:                   interaction.SemanticCandidateID(candidateID),
+		UtteranceID:          utterance.ID,
+		Source:               interaction.CandidateSourceCognitive,
+		SelectionState:       interaction.CandidateObserved,
+		PrimarySpeechAct:     interaction.SpeechActQuestion,
+		SecondarySpeechAct:   interaction.SpeechActUnknown,
+		ConfidenceMillis:     780,
+		Applicability:        interaction.SemanticNeedsBroaderInterpret,
+		RequestedOutcome:     "",
+		Clarification:        interaction.ClarificationNotRequired,
+		NeedsCognition:       true,
+		SelectionReason:      "trace-oriented cognitive clarification of identity-style intent",
+		CapabilityHints:      []string{"COGNITIVE_REASONING"},
+		RecordedAtUnixMillis: time.Unix(100, 0).UnixMilli(),
+	}
+	selected := ApplyCognitiveCandidate(result, message, cognitiveCandidate, nil)
+	var deterministic, selectedCandidate *interaction.SemanticCandidate
+	for index := range selected.Candidates {
+		c := &selected.Candidates[index]
+		if c.Source == interaction.CandidateSourceDeterministic {
+			deterministic = c
+		}
+		if c.SelectionState == interaction.CandidateSelected {
+			selectedCandidate = c
+		}
+	}
+	if deterministic == nil {
+		t.Fatal("expected deterministic candidate in trace")
+	}
+	if selectedCandidate == nil {
+		t.Fatal("expected selected candidate in trace")
+	}
+	if selected.Interpretation.Source != string(interaction.CandidateSourceCognitive) {
+		t.Fatalf("selection source should switch to cognitive, got %s", selected.Interpretation.Source)
+	}
+	if selected.Interpretation.NeedsCognition != selectedCandidate.NeedsCognition {
+		t.Fatalf("expected selected interpretation cognition=%t got %t", selectedCandidate.NeedsCognition, selected.Interpretation.NeedsCognition)
+	}
+	if selected.Interpretation.Clarification != selectedCandidate.Clarification {
+		t.Fatalf("expected selected candidate clarification to match interpretation clarification")
+	}
+	if selectedCandidate.SelectionReason == "" {
+		t.Fatal("expected clarification/selection reason in selected trace")
+	}
+	t.Logf("TRACE deterministic_source=%s cognitive_source=%s selected_source=%s needs_cognition=%t clarification_reason=%s",
+		deterministic.Source, selectedCandidate.Source, selected.Interpretation.Source, selected.Interpretation.NeedsCognition, selected.Interpretation.SelectionReason)
+}
+
 func TestInterpretUtteranceModalExplanationRequestStillRequestsCognition(t *testing.T) {
 	for _, message := range []string{"можешь расказать об утре", "расскажи об утре", "про утро расскажешь"} {
 		result := interpretForTest(t, message, nil, "")