Test the clarify round-trip end to end at the daemon level

Covers: a reminder with no time is asked about and completes on the answer; the
same for a fact; an answer past the TTL falls through as a fresh utterance; a
second unclear answer drops the request with no second question; a clarified act
off the allowlist neither runs nor gets enabled; a clarified destructive act
still parks a confirm; noise keeps the canned reply. No model, no network.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CGeSZxh1DCtRxmFVSYVGvJ

cmd/mavend/clarify.go

@@ -0,0 +1,180 @@
+package main
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"github.com/kami/maven/internal/dialogue"
+	"github.com/kami/maven/internal/router"
+)
+
+// clarifyTTL — how long a parked question stays answerable. Same 90s as the
+// confirm gate, for the same reason: an answer is a same-breath gesture, and a
+// stale question must not eat an unrelated later utterance.
+const clarifyTTL = 90 * time.Second
+
+// wantedSlots — what each intent needs before she can act on it. First entry is
+// the one she asks about; the rest are only used to decide act-vs-drop.
+//
+// Intents not listed here are never worth a question: note and query act on the
+// raw utterance, chat and system have nothing to fill in. For those a clarify
+// decision keeps the canned "не поняла" reply — inventing a question for noise
+// is worse than admitting she missed it.
+var wantedSlots = map[router.Intent][]dialogue.Slot{
+	router.IntentReminder: {dialogue.SlotTime},
+	router.IntentFact:     {dialogue.SlotKey},
+	router.IntentAct:      {dialogue.SlotFn},
+}
+
+// clarifyQuestions — one short question per missing slot.
+//
+// These are fixed templates, not model output. The resident model is a 0.8B; it
+// would wander, and a question whose wording changes every time is harder to
+// answer than a blunt one that always reads the same. They are infinitive
+// questions, so there is no gender agreement to get wrong; the feminine
+// self-reference lives in the reply she gives when she drops the request.
+var clarifyQuestions = map[dialogue.Slot]string{
+	dialogue.SlotTime: "На когда напомнить?",
+	dialogue.SlotKey:  "Что записать?",
+	dialogue.SlotFn:   "Что сделать?",
+}
+
+// clarifyDropped — she asked once, the answer still did not fill the gap, so
+// the request is gone. Said plainly, once, with no second question.
+const clarifyDropped = "Не разобрала — скажи целиком, пожалуйста."
+
+// missingFor returns the slots a decision still needs, most important first.
+// Empty ⇒ there is nothing identifiable to ask about.
+func missingFor(dec router.Decision) []dialogue.Slot {
+	return dialogue.StillMissing(wantedSlots[dec.Intent], toDialogueSlots(dec.Slots))
+}
+
+// clarifyQuestion picks the one question to ask for a clarify decision. Returns
+// ("", false) when she has no idea what is missing.
+//
+// One question about one thing: if two slots are missing she asks about the
+// first and lets the rest go. Two questions in a row is an interrogation.
+func clarifyQuestion(dec router.Decision) (dialogue.Slot, string, bool) {
+	missing := missingFor(dec)
+	if len(missing) == 0 {
+		return "", "", false
+	}
+	q, ok := clarifyQuestions[missing[0]]
+	if !ok {
+		return "", "", false
+	}
+	return missing[0], q, true
+}
+
+// askClarify parks the request and returns the question to ask instead of the
+// canned "не поняла". Returns ("", false) when there is nothing to ask about, so
+// the caller falls back to the canned reply.
+func (h *reactiveHandler) askClarify(dec router.Decision) (string, bool) {
+	if h.clarifyStore == nil {
+		return "", false
+	}
+	slot, question, ok := clarifyQuestion(dec)
+	if !ok {
+		return "", false
+	}
+	h.clarifyStore.Put(voiceDialogueID, &dialogue.PendingQuestion{
+		Intent:    dialogue.Intent(dec.Intent),
+		Slots:     toDialogueSlots(dec.Slots),
+		Missing:   []dialogue.Slot{slot},
+		Utterance: dec.Utterance,
+		Asked:     h.now(),
+		TTL:       clarifyTTL,
+		Attempts:  1, // asked once; MaxAttempts is 1, so there is no second ask
+	})
+	log.Printf("voice: clarify — asked about %s for intent=%s", slot, dec.Intent)
+	return question, true
+}
+
+// resolveClarifyAnswer reads an utterance as the answer to a parked question.
+// Returns ("", false) when no live question is parked (or it expired), so the
+// caller routes the utterance normally as a fresh request. Sibling of
+// resolveConfirm and checked in the same place.
+//
+// The answer is parsed with the same extractor the router uses, for the intent
+// she parked — no second parser. If it still does not fill the gap the request
+// is dropped: she does not ask again.
+func (h *reactiveHandler) resolveClarifyAnswer(ctx context.Context, text string) (string, bool) {
+	if h.clarifyStore == nil {
+		return "", false
+	}
+	q := h.clarifyStore.Get(voiceDialogueID, h.now())
+	if q == nil {
+		return "", false
+	}
+	// One shot either way: the question is consumed whether or not the answer
+	// works, so a failed answer can't leave the question armed.
+	h.clarifyStore.Delete(voiceDialogueID)
+
+	intent := router.Intent(q.Intent)
+	answer := h.extractor.Extract(ctx, intent, text, h.now())
+	merged := q.Answer(text, toDialogueSlots(answer))
+	if len(dialogue.StillMissing(q.Missing, merged)) > 0 {
+		log.Printf("voice: clarify — answer %q did not fill %v, dropping", text, q.Missing)
+		return clarifyDropped, true
+	}
+
+	// Rebuild the decision as if it had routed cleanly, then run it down the
+	// normal path. Clarify is deliberately false and the intent is unchanged:
+	// filling in an argument never grants authority, so the completed decision
+	// still meets the allowlist and the destructive-act confirm gate in
+	// applyAction exactly like any other decision.
+	dec := router.Decision{
+		Utterance: q.Utterance,
+		Stage:     2,
+		Intent:    intent,
+		Slots:     applyDialogueSlots(answer, merged),
+	}
+	return h.finishClarified(ctx, dec), true
+}
+
+// finishClarified runs a completed decision through the same steps a freshly
+// routed one takes: remember the turn, act, then phrase.
+func (h *reactiveHandler) finishClarified(ctx context.Context, dec router.Decision) string {
+	if h.dialogueSessions != nil {
+		now := h.now()
+		prev := h.dialogueSessions.Get(voiceDialogueID, now)
+		dec = followUpMerge(prev, dec, now)
+		h.rememberTurn(prev, dec, now)
+	}
+	reply := h.applyAction(ctx, dec)
+	if reply == "" {
+		reply = h.replier.Reply(dec)
+	}
+	return reply
+}
+
+// rememberTurn stores this turn as the dialogue session the next follow-up
+// inherits from, carrying up to 4 prior turns of history for anaphora. Capped so
+// one long conversation can't grow the session unboundedly.
+func (h *reactiveHandler) rememberTurn(prev *dialogue.Session, dec router.Decision, now time.Time) {
+	var history []dialogue.Turn
+	if prev != nil {
+		history = append(history, dialogue.Turn{
+			Intent: prev.Intent,
+			Slots:  prev.Slots,
+			Text:   prev.Slots.Text,
+		})
+		maxHist := len(prev.History)
+		if maxHist > 3 {
+			maxHist = 3
+		}
+		history = append(history, prev.History[:maxHist]...)
+	}
+	ttl := time.Duration(0) // use the store default (2 min)
+	if dec.Intent == router.IntentChat {
+		ttl = 15 * time.Minute // conversational turns should last longer
+	}
+	h.dialogueSessions.Put(voiceDialogueID, &dialogue.Session{
+		Intent:    dialogue.Intent(dec.Intent),
+		Slots:     toDialogueSlots(dec.Slots),
+		Timestamp: now,
+		TTL:       ttl,
+		History:   history,
+	})
+}

cmd/mavend/clarify_test.go

@@ -0,0 +1,238 @@
+package main
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/kami/maven/internal/dialogue"
+	"github.com/kami/maven/internal/ipc"
+	"github.com/kami/maven/internal/router"
+	"github.com/kami/maven/internal/store"
+	"github.com/kami/maven/internal/tool"
+	"github.com/kami/maven/internal/voice"
+)
+
+// newClarifyHandler builds a handler with the clarify path wired and no model:
+// stub date parser, the real fact parser, and a matcher over whatever tools the
+// test enabled. `now` is fixed so TTL behaviour is testable.
+func newClarifyHandler(t *testing.T) (*reactiveHandler, *store.Store, *time.Time) {
+	t.Helper()
+	st := newTestStore(t)
+	api := ipc.NewStoreAPI(st)
+	now := time.Date(2026, 7, 31, 9, 0, 0, 0, time.UTC)
+	matcher := tool.NewMatcher(api)
+	h := &reactiveHandler{
+		api:              api,
+		dataStore:        st,
+		tools:            tool.NewExecutor(api, 2*time.Second),
+		matcher:          matcher,
+		replier:          voice.NewStubReplier(),
+		now:              func() time.Time { return now },
+		dialogueSessions: dialogue.NewSessionStore(2 * time.Minute),
+		clarifyStore:     dialogue.NewClarifyStore(clarifyTTL),
+		extractor: router.Extractor{
+			Time:  router.StubDateTimeParser{},
+			Acts:  matcher,
+			Facts: router.DefaultFactParser{},
+		},
+	}
+	return h, st, &now
+}
+
+func clarifyDec(intent router.Intent, slots router.Slots, utterance string) router.Decision {
+	return router.Decision{Utterance: utterance, Stage: 3, Intent: intent, Slots: slots, Clarify: true}
+}
+
+// TestClarifyQuestionForMissingSlot pins which question goes with which gap, and
+// which intents get no question at all.
+func TestClarifyQuestionForMissingSlot(t *testing.T) {
+	cases := []struct {
+		name  string
+		dec   router.Decision
+		want  string
+		asked bool
+	}{
+		{"reminder without a time", clarifyDec(router.IntentReminder, router.Slots{Text: "напомни позвонить маме"}, "напомни позвонить маме"), "На когда напомнить?", true},
+		{"fact without a key", clarifyDec(router.IntentFact, router.Slots{Text: "запиши"}, "запиши"), "Что записать?", true},
+		{"act without a fn", clarifyDec(router.IntentAct, router.Slots{Text: "сделай это"}, "сделай это"), "Что сделать?", true},
+		{"reminder that already has a time", clarifyDec(router.IntentReminder, router.Slots{HasTime: true}, "напомни в 11"), "", false},
+		{"chat is never worth a question", clarifyDec(router.IntentChat, router.Slots{Text: "мгм"}, "мгм"), "", false},
+		{"query is never worth a question", clarifyDec(router.IntentQuery, router.Slots{Text: "а"}, "а"), "", false},
+	}
+	for _, tc := range cases {
+		_, got, asked := clarifyQuestion(tc.dec)
+		if asked != tc.asked || got != tc.want {
+			t.Errorf("%s: got (%q, %v), want (%q, %v)", tc.name, got, asked, tc.want, tc.asked)
+		}
+	}
+}
+
+// TestClarifyReminderCompletesOnAnswer is the whole point of the feature: she
+// asks for the missing time and the answer creates the reminder.
+func TestClarifyReminderCompletesOnAnswer(t *testing.T) {
+	ctx := context.Background()
+	h, st, _ := newClarifyHandler(t)
+
+	question, asked := h.askClarify(clarifyDec(router.IntentReminder, router.Slots{Text: "напомни позвонить маме"}, "напомни позвонить маме"))
+	if !asked || question != "На когда напомнить?" {
+		t.Fatalf("expected the time question, got %q asked=%v", question, asked)
+	}
+
+	reply, handled := h.resolveClarifyAnswer(ctx, "в 11:00")
+	if !handled {
+		t.Fatal("the answer to an open question must be consumed as an answer")
+	}
+	if reply == clarifyDropped {
+		t.Fatalf("a good answer must not drop the request: %q", reply)
+	}
+
+	reminders, err := st.DueReminders(ctx, h.now().Add(48*time.Hour))
+	if err != nil || len(reminders) != 1 {
+		t.Fatalf("clarified reminder was not created: reminders=%v err=%v", reminders, err)
+	}
+	if !strings.Contains(reminders[0].Payload, "маме") {
+		t.Fatalf("the reminder lost the original request: %q", reminders[0].Payload)
+	}
+	if h.clarifyStore.Get(voiceDialogueID, h.now()) != nil {
+		t.Fatal("the question must be cleared once answered")
+	}
+}
+
+// TestClarifyFactCompletesOnAnswer — the fact path, where the answer carries
+// both the key and the value.
+func TestClarifyFactCompletesOnAnswer(t *testing.T) {
+	ctx := context.Background()
+	h, st, _ := newClarifyHandler(t)
+
+	if _, asked := h.askClarify(clarifyDec(router.IntentFact, router.Slots{Text: "запиши"}, "запиши")); !asked {
+		t.Fatal("a fact with no key should be asked about")
+	}
+	if reply, handled := h.resolveClarifyAnswer(ctx, "пил воду"); !handled || reply == clarifyDropped {
+		t.Fatalf("answer should complete the fact, handled=%v reply=%q", handled, reply)
+	}
+	if fact, err := st.LatestFact(ctx, "water"); err != nil || fact.Key != "water" {
+		t.Fatalf("clarified fact was not written: fact=%+v err=%v", fact, err)
+	}
+}
+
+// TestClarifyAnswerAfterTTLIsANewRequest — a late answer is not an answer.
+func TestClarifyAnswerAfterTTLIsANewRequest(t *testing.T) {
+	ctx := context.Background()
+	h, st, now := newClarifyHandler(t)
+
+	if _, asked := h.askClarify(clarifyDec(router.IntentReminder, router.Slots{Text: "напомни"}, "напомни")); !asked {
+		t.Fatal("expected a question")
+	}
+	*now = now.Add(clarifyTTL + time.Second)
+
+	if reply, handled := h.resolveClarifyAnswer(ctx, "в 11:00"); handled {
+		t.Fatalf("an answer past the TTL must fall through to normal routing, got %q", reply)
+	}
+	if reminders, err := st.DueReminders(ctx, now.Add(48*time.Hour)); err != nil || len(reminders) != 0 {
+		t.Fatalf("expired question must not create anything: reminders=%v err=%v", reminders, err)
+	}
+}
+
+// TestClarifyUnclearAnswerDropsWithoutAskingAgain — MaxAttempts is 1.
+func TestClarifyUnclearAnswerDropsWithoutAskingAgain(t *testing.T) {
+	ctx := context.Background()
+	h, st, _ := newClarifyHandler(t)
+
+	if _, asked := h.askClarify(clarifyDec(router.IntentReminder, router.Slots{Text: "напомни"}, "напомни")); !asked {
+		t.Fatal("expected a question")
+	}
+	reply, handled := h.resolveClarifyAnswer(ctx, "ну не знаю")
+	if !handled || reply != clarifyDropped {
+		t.Fatalf("an unclear answer should drop the request, handled=%v reply=%q", handled, reply)
+	}
+	if strings.Contains(reply, "?") {
+		t.Fatalf("she must not ask a second question: %q", reply)
+	}
+	if h.clarifyStore.Get(voiceDialogueID, h.now()) != nil {
+		t.Fatal("a dropped request must leave no armed question")
+	}
+	if reminders, err := st.DueReminders(ctx, h.now().Add(48*time.Hour)); err != nil || len(reminders) != 0 {
+		t.Fatalf("a dropped request must not create anything: reminders=%v err=%v", reminders, err)
+	}
+}
+
+// TestClarifiedActOffAllowlistIsStillRefused — clarification fills in an
+// argument, it never grants authority.
+func TestClarifiedActOffAllowlistIsStillRefused(t *testing.T) {
+	ctx := context.Background()
+	h, st, _ := newClarifyHandler(t)
+	marker := filepath.Join(t.TempDir(), "not-allowed-ran")
+
+	if _, asked := h.askClarify(clarifyDec(router.IntentAct, router.Slots{Text: "сделай это"}, "сделай это")); !asked {
+		t.Fatal("an act with no fn should be asked about")
+	}
+	reply, handled := h.resolveClarifyAnswer(ctx, "rm "+marker)
+	if !handled {
+		t.Fatal("the answer should be consumed")
+	}
+	if strings.Contains(reply, "готово") {
+		t.Fatalf("an act that is not on the allowlist must not report success: %q", reply)
+	}
+	if _, err := os.Stat(marker); !os.IsNotExist(err) {
+		t.Fatalf("a clarified act off the allowlist ran anyway: %v", err)
+	}
+	if tools, err := st.ListTools(ctx, "enabled"); err != nil || len(tools) != 0 {
+		t.Fatalf("clarify must not enable a tool: tools=%+v err=%v", tools, err)
+	}
+}
+
+// TestClarifiedDestructiveActStillNeedsConfirm — the confirm gate survives the
+// clarify path.
+func TestClarifiedDestructiveActStillNeedsConfirm(t *testing.T) {
+	ctx := context.Background()
+	h, st, _ := newClarifyHandler(t)
+	marker := filepath.Join(t.TempDir(), "destructive-ran")
+	if err := st.EnableTool(ctx, "delete_backups", []string{"touch", marker}, true, "test", h.now()); err != nil {
+		t.Fatal(err)
+	}
+
+	if _, asked := h.askClarify(clarifyDec(router.IntentAct, router.Slots{Text: "сделай это"}, "сделай это")); !asked {
+		t.Fatal("expected a question")
+	}
+	reply, handled := h.resolveClarifyAnswer(ctx, "delete_backups")
+	if !handled {
+		t.Fatal("the answer should be consumed")
+	}
+	if !strings.Contains(reply, "да") || h.pending == nil {
+		t.Fatalf("a clarified destructive act must still park a confirm: reply=%q pending=%+v", reply, h.pending)
+	}
+	if _, err := os.Stat(marker); !os.IsNotExist(err) {
+		t.Fatalf("a clarified destructive act ran before confirmation: %v", err)
+	}
+}
+
+// TestNoQuestionWhenNothingIsMissing — noise keeps the canned reply, so she
+// never invents a question for nothing.
+func TestNoQuestionWhenNothingIsMissing(t *testing.T) {
+	h, _, _ := newClarifyHandler(t)
+	for _, dec := range []router.Decision{
+		clarifyDec(router.IntentChat, router.Slots{Text: "эм"}, "эм"),
+		clarifyDec(router.IntentQuery, router.Slots{Text: "ммм"}, "ммм"),
+		clarifyDec(router.IntentNote, router.Slots{Text: "..."}, "..."),
+	} {
+		if question, asked := h.askClarify(dec); asked {
+			t.Fatalf("intent %s should keep the canned reply, got %q", dec.Intent, question)
+		}
+	}
+	if h.clarifyStore.Get(voiceDialogueID, h.now()) != nil {
+		t.Fatal("noise must not park a question")
+	}
+}
+
+// TestNoPendingQuestionFallsThrough — with nothing parked, an utterance routes
+// normally.
+func TestNoPendingQuestionFallsThrough(t *testing.T) {
+	h, _, _ := newClarifyHandler(t)
+	if reply, handled := h.resolveClarifyAnswer(context.Background(), "напомни в 11:00"); handled {
+		t.Fatalf("no open question ⇒ must not be treated as an answer, got %q", reply)
+	}
+}

cmd/mavend/voice.go

@@ -226,6 +226,8 @@ func wireVoice(cfg *config.Config, coreAPI ipc.CoreAPI, phr phraser.Phraser, mem
 
 	// ----- dialogue (multi-turn slot carry-over; 2-min follow-up window) -----
 	dialogueSessions := dialogue.NewSessionStore(2 * time.Minute)
+	clarifyStore := dialogue.NewClarifyStore(clarifyTTL)
+	timeParser := router.NewPythonDateParser()
 
 	// ----- replier (LLM-backed when the engine is on, Stub floor otherwise) -----
 	replier := voice.Replier(voice.NewStubReplier())
@@ -250,8 +252,10 @@ func wireVoice(cfg *config.Config, coreAPI ipc.CoreAPI, phr phraser.Phraser, mem
 		memStore:         memStore,
 		dataStore:        dataStore,
 		dialogueSessions: dialogueSessions,
+		clarifyStore:     clarifyStore,
+		extractor:        router.Extractor{Time: timeParser, Acts: matcher, Facts: router.DefaultFactParser{}},
 		queryMinScore:    cfg.Voice.QueryMinScore,
-		timeParser:       router.NewPythonDateParser(),
+		timeParser:       timeParser,
 		ecosystem:        eco,
 	}
 
@@ -304,6 +308,14 @@ type reactiveHandler struct {
 	// box → one session slot, keyed voiceDialogueID). nil ⇒ no carry-over.
 	dialogueSessions *dialogue.SessionStore
 
+	// clarifyStore parks the request behind an open question she asked (see
+	// clarify.go). nil ⇒ she falls back to the canned "не поняла" reply.
+	clarifyStore *dialogue.ClarifyStore
+
+	// extractor parses the answer to an open question, with the same parsers
+	// the router's own stage-2 uses.
+	extractor router.Extractor
+
 	// pending destructive-act confirmation. A destructive act replies with a
 	// "выполнить X? да/нет" prompt and parks here; the NEXT utterance is read as
 	// the y/n answer. ponytail: single slot, single-user box — a second act
@@ -378,6 +390,13 @@ func (h *reactiveHandler) HandlePushToTalk(ctx context.Context, req voice.PushTo
 		return h.reply(ctx, reply, nil)
 	}
 
+	// 1b2. clarify answer — if she asked a question last turn, this utterance is
+	// its answer, not a fresh command. After the confirm check: a y/n gate is
+	// armed by her own prompt and is the narrower claim on the utterance.
+	if reply, handled := h.resolveClarifyAnswer(ctx, text); handled {
+		return h.reply(ctx, reply, nil)
+	}
+
 	// 1c. quiet-hours toggle — keyword match, not classifier-dependent.
 	// "тихий режим" / "quiet on" would route through the classifier
 	// unreliably (it's a command, not a free-form query), so we match it
@@ -407,34 +426,16 @@ func (h *reactiveHandler) HandlePushToTalk(ctx context.Context, req voice.PushTo
 		prev := h.dialogueSessions.Get(voiceDialogueID, now)
 		dec = followUpMerge(prev, dec, now)
 		if !dec.Clarify {
-			// Build history: carry over up to 4 prior turns for cross-intent
-			// reference. The most recent prior turn is prepended to history.
-			var history []dialogue.Turn
-			if prev != nil {
-				history = append(history, dialogue.Turn{
-					Intent: prev.Intent,
-					Slots:  prev.Slots,
-					Text:   prev.Slots.Text, // the prior turn's utterance
-				})
-				// Cap history depth so one long conversation can't grow
-				// the session unboundedly.
-				maxHist := len(prev.History)
-				if maxHist > 3 {
-					maxHist = 3
-				}
-				history = append(history, prev.History[:maxHist]...)
-			}
-			ttl := time.Duration(0) // use default (2 min)
-			if dec.Intent == router.IntentChat {
-				ttl = 15 * time.Minute // conversational turns should last longer
-			}
-			h.dialogueSessions.Put(voiceDialogueID, &dialogue.Session{
-				Intent:    dialogue.Intent(dec.Intent),
-				Slots:     toDialogueSlots(dec.Slots),
-				Timestamp: now,
-				TTL:       ttl,
-				History:   history,
-			})
+			h.rememberTurn(prev, dec, now)
+		}
+	}
+
+	// 2c. clarify — she is not sure. If one named thing is missing, ask about it
+	// and park the request (clarify.go); otherwise the replier's canned reply
+	// stands.
+	if dec.Clarify {
+		if question, asked := h.askClarify(dec); asked {
+			return h.reply(ctx, question, nil)
 		}
 	}
 
@@ -465,6 +466,11 @@ func (h *reactiveHandler) handleText(ctx context.Context, text string) string {
 		return reply
 	}
 
+	// 1b2. clarify answer — same check as HandlePushToTalk.
+	if reply, handled := h.resolveClarifyAnswer(ctx, text); handled {
+		return reply
+	}
+
 	// 2. router — classify the utterance.
 	dec, err := h.router.Route(ctx, text, h.now())
 	if err != nil {
@@ -482,30 +488,14 @@ func (h *reactiveHandler) handleText(ctx context.Context, text string) string {
 		prev := h.dialogueSessions.Get(voiceDialogueID, now)
 		dec = followUpMerge(prev, dec, now)
 		if !dec.Clarify {
-			var history []dialogue.Turn
-			if prev != nil {
-				history = append(history, dialogue.Turn{
-					Intent: prev.Intent,
-					Slots:  prev.Slots,
-					Text:   prev.Slots.Text,
-				})
-				maxHist := len(prev.History)
-				if maxHist > 3 {
-					maxHist = 3
-				}
-				history = append(history, prev.History[:maxHist]...)
-			}
-			ttl := time.Duration(0)
-			if dec.Intent == router.IntentChat {
-				ttl = 15 * time.Minute
-			}
-			h.dialogueSessions.Put(voiceDialogueID, &dialogue.Session{
-				Intent:    dialogue.Intent(dec.Intent),
-				Slots:     toDialogueSlots(dec.Slots),
-				Timestamp: now,
-				TTL:       ttl,
-				History:   history,
-			})
+			h.rememberTurn(prev, dec, now)
+		}
+	}
+
+	// 2c. clarify — same as HandlePushToTalk: ask about the one missing thing.
+	if dec.Clarify {
+		if question, asked := h.askClarify(dec); asked {
+			return question
 		}
 	}
 

internal/dialogue/clarify.go

@@ -0,0 +1,171 @@
+package dialogue
+
+import (
+	"sync"
+	"time"
+)
+
+// Slot names one field of Slots. Named type, not a free string, so a missing
+// slot cannot be misspelled — the question phrasing switches on these.
+type Slot string
+
+const (
+	SlotTime  Slot = "time"  // Slots.Time / HasTime
+	SlotKey   Slot = "key"   // Slots.Key / HasKey
+	SlotValue Slot = "value" // Slots.Value (paired with Key)
+	SlotFn    Slot = "fn"    // Slots.Fn / HasFn
+	SlotText  Slot = "text"  // Slots.Text
+)
+
+// MaxAttempts is 1 because Maven is not a nag (DESIGN.md § Non-goals). She asks
+// one clarifying question. If the answer still leaves the slot empty she drops
+// the request instead of asking again.
+const MaxAttempts = 1
+
+// PendingQuestion is what Maven holds while she waits for an answer to an open
+// question. Unlike the yes/no confirms in cmd/mavend/voice.go, the answer here
+// is free text that fills a missing slot rather than a verdict.
+type PendingQuestion struct {
+	Intent    Intent // what the router already guessed
+	Slots     Slots  // what it already filled
+	Missing   []Slot // what is still empty, in the order to ask about
+	Utterance string // the user's original raw words
+	Asked     time.Time
+	TTL       time.Duration
+	Attempts  int // questions already asked; capped by MaxAttempts
+}
+
+func (q *PendingQuestion) IsExpired(now time.Time) bool {
+	return now.After(q.Asked.Add(q.TTL))
+}
+
+// CanAsk reports whether Maven may ask another question about this request.
+func (q *PendingQuestion) CanAsk() bool {
+	return q.Attempts < MaxAttempts
+}
+
+// TODO: the daemon will phrase the question text from Missing (one short ru
+// question per Slot, feminine self-reference) and speak it here.
+
+// ClarifyStore holds the parked questions. Same shape and locking as
+// SessionStore: keyed by dialogue id, expired entries dropped on read.
+type ClarifyStore struct {
+	mu         sync.RWMutex
+	questions  map[string]*PendingQuestion
+	defaultTTL time.Duration
+}
+
+func NewClarifyStore(defaultTTL time.Duration) *ClarifyStore {
+	if defaultTTL <= 0 {
+		// Short, like confirmTTL in voice.go: a clarifying question is a
+		// same-breath gesture, a stale one should not eat a later utterance.
+		defaultTTL = 90 * time.Second
+	}
+	return &ClarifyStore{
+		questions:  make(map[string]*PendingQuestion),
+		defaultTTL: defaultTTL,
+	}
+}
+
+// TODO: the daemon will Put a question here when Decision.Clarify fires, in
+// place of the flat "не разобрала" reply (cmd/mavend/voice.go).
+func (s *ClarifyStore) Put(id string, q *PendingQuestion) {
+	if q.TTL <= 0 {
+		q.TTL = s.defaultTTL
+	}
+	s.mu.Lock()
+	s.questions[id] = q
+	s.mu.Unlock()
+}
+
+// TODO: the daemon will Get on the next turn, parse that turn into Slots, call
+// Answer, and Delete — the open-question twin of resolveConfirm.
+func (s *ClarifyStore) Get(id string, now time.Time) *PendingQuestion {
+	s.mu.RLock()
+	q, ok := s.questions[id]
+	s.mu.RUnlock()
+	if !ok {
+		return nil
+	}
+	if q.IsExpired(now) {
+		s.Delete(id)
+		return nil
+	}
+	return q
+}
+
+func (s *ClarifyStore) Delete(id string) {
+	s.mu.Lock()
+	delete(s.questions, id)
+	s.mu.Unlock()
+}
+
+// Answer merges the slots parsed from the user's answer into the parked ones.
+// Only the slots listed in Missing are filled, and an already filled slot is
+// never overwritten — the answer completes the original request, it does not
+// restate it. Parsing the answer text into `answer` is the caller's job; this
+// package must stay free of internal/router.
+func (q *PendingQuestion) Answer(text string, answer Slots) Slots {
+	out := q.Slots
+	for _, slot := range q.Missing {
+		switch slot {
+		case SlotTime:
+			if !out.HasTime && answer.HasTime {
+				out.Time = answer.Time
+				out.HasTime = true
+			}
+		case SlotKey:
+			if !out.HasKey && answer.HasKey {
+				out.Key = answer.Key
+				out.HasKey = true
+			}
+		case SlotValue:
+			if out.Value == "" && answer.Value != "" {
+				out.Value = answer.Value
+			}
+		case SlotFn:
+			if !out.HasFn && answer.HasFn {
+				out.Fn = answer.Fn
+				out.HasFn = true
+				if len(out.Args) == 0 {
+					out.Args = append([]string(nil), answer.Args...)
+				}
+			}
+		case SlotText:
+			if out.Text == "" {
+				if answer.Text != "" {
+					out.Text = answer.Text
+				} else {
+					// No parse for a text slot — the raw answer IS the text.
+					out.Text = text
+				}
+			}
+		}
+	}
+	return out
+}
+
+// StillMissing lists the slots that are empty in s, out of the ones asked for.
+// The caller uses it to decide between acting and dropping the request.
+func StillMissing(want []Slot, s Slots) []Slot {
+	var out []Slot
+	for _, slot := range want {
+		empty := false
+		switch slot {
+		case SlotTime:
+			empty = !s.HasTime
+		case SlotKey:
+			empty = !s.HasKey
+		case SlotValue:
+			empty = s.Value == ""
+		case SlotFn:
+			empty = !s.HasFn
+		case SlotText:
+			empty = s.Text == ""
+		}
+		if empty {
+			out = append(out, slot)
+		}
+	}
+	return out
+}

internal/dialogue/clarify_test.go

@@ -0,0 +1,225 @@
+package dialogue
+
+import (
+	"testing"
+	"time"
+)
+
+var base = time.Date(2026, 7, 31, 12, 0, 0, 0, time.UTC)
+
+func TestPendingQuestionIsExpired(t *testing.T) {
+	cases := []struct {
+		name string
+		ttl  time.Duration
+		now  time.Time
+		want bool
+	}{
+		{"fresh", time.Minute, base.Add(10 * time.Second), false},
+		{"exactly at ttl", time.Minute, base.Add(time.Minute), false},
+		{"past ttl", time.Minute, base.Add(2 * time.Minute), true},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			q := &PendingQuestion{Asked: base, TTL: tc.ttl}
+			if got := q.IsExpired(tc.now); got != tc.want {
+				t.Fatalf("IsExpired = %v, want %v", got, tc.want)
+			}
+		})
+	}
+}
+
+func TestClarifyStoreGetPutDelete(t *testing.T) {
+	s := NewClarifyStore(time.Minute)
+
+	if got := s.Get("voice", base); got != nil {
+		t.Fatalf("empty store returned %+v", got)
+	}
+
+	q := &PendingQuestion{Intent: IntentReminder, Missing: []Slot{SlotTime}, Asked: base}
+	s.Put("voice", q)
+	if q.TTL != time.Minute {
+		t.Fatalf("Put did not apply the default TTL, got %v", q.TTL)
+	}
+	if got := s.Get("voice", base.Add(time.Second)); got != q {
+		t.Fatalf("Get returned %+v, want the parked question", got)
+	}
+
+	// Expired questions are dropped on read, not returned.
+	if got := s.Get("voice", base.Add(2*time.Minute)); got != nil {
+		t.Fatalf("expired Get returned %+v", got)
+	}
+	if got := s.Get("voice", base); got != nil {
+		t.Fatalf("expired question was not deleted: %+v", got)
+	}
+
+	s.Put("voice", &PendingQuestion{Asked: base, TTL: time.Hour})
+	s.Delete("voice")
+	if got := s.Get("voice", base); got != nil {
+		t.Fatalf("Delete left %+v", got)
+	}
+}
+
+func TestNewClarifyStoreDefaultTTL(t *testing.T) {
+	s := NewClarifyStore(0)
+	q := &PendingQuestion{Asked: base}
+	s.Put("voice", q)
+	if q.TTL != 90*time.Second {
+		t.Fatalf("TTL = %v, want 90s", q.TTL)
+	}
+}
+
+func TestAnswerFillsOnlyMissingSlots(t *testing.T) {
+	answerTime := base.Add(3 * time.Hour)
+	other := base.Add(9 * time.Hour)
+
+	cases := []struct {
+		name    string
+		parked  Slots
+		missing []Slot
+		text    string
+		answer  Slots
+		want    Slots
+	}{
+		{
+			name:    "fills the missing time",
+			parked:  Slots{Text: "напомни позвонить"},
+			missing: []Slot{SlotTime},
+			text:    "в три",
+			answer:  Slots{Time: answerTime, HasTime: true},
+			want:    Slots{Text: "напомни позвонить", Time: answerTime, HasTime: true},
+		},
+		{
+			name:    "does not overwrite a filled time",
+			parked:  Slots{Time: other, HasTime: true},
+			missing: []Slot{SlotTime},
+			text:    "в три",
+			answer:  Slots{Time: answerTime, HasTime: true},
+			want:    Slots{Time: other, HasTime: true},
+		},
+		{
+			name:    "ignores slots that were not missing",
+			parked:  Slots{Key: "water", HasKey: true},
+			missing: []Slot{SlotValue},
+			text:    "два литра",
+			answer:  Slots{Key: "sleep", HasKey: true, Value: "2l"},
+			want:    Slots{Key: "water", HasKey: true, Value: "2l"},
+		},
+		{
+			name:    "fills key when empty",
+			parked:  Slots{},
+			missing: []Slot{SlotKey, SlotValue},
+			text:    "воды",
+			answer:  Slots{Key: "water", HasKey: true, Value: `"drank"`},
+			want:    Slots{Key: "water", HasKey: true, Value: `"drank"`},
+		},
+		{
+			name:    "fills fn and its args",
+			parked:  Slots{},
+			missing: []Slot{SlotFn},
+			text:    "перезапусти nginx",
+			answer:  Slots{Fn: "restart", Args: []string{"nginx"}, HasFn: true},
+			want:    Slots{Fn: "restart", Args: []string{"nginx"}, HasFn: true},
+		},
+		{
+			name:    "keeps existing args when fn was already known",
+			parked:  Slots{Fn: "restart", Args: []string{"nginx"}, HasFn: true},
+			missing: []Slot{SlotFn},
+			text:    "останови postgres",
+			answer:  Slots{Fn: "stop", Args: []string{"postgres"}, HasFn: true},
+			want:    Slots{Fn: "restart", Args: []string{"nginx"}, HasFn: true},
+		},
+		{
+			name:    "raw answer becomes the text when nothing was parsed",
+			parked:  Slots{},
+			missing: []Slot{SlotText},
+			text:    "купить хлеб",
+			answer:  Slots{},
+			want:    Slots{Text: "купить хлеб"},
+		},
+		{
+			name:    "parsed text wins over the raw answer",
+			parked:  Slots{},
+			missing: []Slot{SlotText},
+			text:    "запиши купить хлеб",
+			answer:  Slots{Text: "купить хлеб"},
+			want:    Slots{Text: "купить хлеб"},
+		},
+		{
+			name:    "empty answer leaves the slot missing",
+			parked:  Slots{Text: "напомни"},
+			missing: []Slot{SlotTime},
+			text:    "не знаю",
+			answer:  Slots{},
+			want:    Slots{Text: "напомни"},
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			q := &PendingQuestion{Slots: tc.parked, Missing: tc.missing, Asked: base}
+			got := q.Answer(tc.text, tc.answer)
+			if got.Time != tc.want.Time || got.HasTime != tc.want.HasTime ||
+				got.Key != tc.want.Key || got.HasKey != tc.want.HasKey ||
+				got.Value != tc.want.Value || got.Text != tc.want.Text ||
+				got.Fn != tc.want.Fn || got.HasFn != tc.want.HasFn {
+				t.Fatalf("Answer = %+v, want %+v", got, tc.want)
+			}
+			if len(got.Args) != len(tc.want.Args) {
+				t.Fatalf("Args = %v, want %v", got.Args, tc.want.Args)
+			}
+			for i := range got.Args {
+				if got.Args[i] != tc.want.Args[i] {
+					t.Fatalf("Args = %v, want %v", got.Args, tc.want.Args)
+				}
+			}
+		})
+	}
+}
+
+func TestCanAskCapsAtOneQuestion(t *testing.T) {
+	if MaxAttempts != 1 {
+		t.Fatalf("MaxAttempts = %d, want 1 (Maven asks once, she is not a nag)", MaxAttempts)
+	}
+	q := &PendingQuestion{Asked: base}
+	if !q.CanAsk() {
+		t.Fatal("a fresh question should be askable")
+	}
+	q.Attempts = MaxAttempts
+	if q.CanAsk() {
+		t.Fatal("the question should not be asked twice")
+	}
+}
+
+func TestStillMissing(t *testing.T) {
+	want := []Slot{SlotTime, SlotKey, SlotValue, SlotFn, SlotText}
+	cases := []struct {
+		name  string
+		slots Slots
+		want  []Slot
+	}{
+		{"all empty", Slots{}, want},
+		{
+			name:  "all filled",
+			slots: Slots{Time: base, HasTime: true, Key: "water", HasKey: true, Value: "1l", Fn: "restart", HasFn: true, Text: "t"},
+			want:  nil,
+		},
+		{
+			name:  "only value left",
+			slots: Slots{Time: base, HasTime: true, Key: "water", HasKey: true, Fn: "restart", HasFn: true, Text: "t"},
+			want:  []Slot{SlotValue},
+		},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := StillMissing(want, tc.slots)
+			if len(got) != len(tc.want) {
+				t.Fatalf("StillMissing = %v, want %v", got, tc.want)
+			}
+			for i := range got {
+				if got[i] != tc.want[i] {
+					t.Fatalf("StillMissing = %v, want %v", got, tc.want)
+				}
+			}
+		})
+	}
+}

internal/dialogue/session.go

@@ -21,6 +21,7 @@ type Slots struct {
 	Time    time.Time
 	HasTime bool
 	Key     string
+	Value   string // payload for a fact key, mirrors router.Slots.Value
 	HasKey  bool
 	Text    string
 	Fn      string
@@ -104,6 +105,9 @@ func InheritSlots(prev, cur Slots) Slots {
 		out.Key = prev.Key
 		out.HasKey = true
 	}
+	if out.Value == "" && prev.Value != "" {
+		out.Value = prev.Value
+	}
 	if out.Text == "" && prev.Text != "" {
 		out.Text = prev.Text
 	}

internal/dialogue/session_test.go

@@ -113,4 +113,14 @@ func TestInheritSlots(t *testing.T) {
 	if inherited6.Text != "какая погода в москве" {
 		t.Error("should inherit text when current is empty")
 	}
+
+	prevValue := Slots{Key: "water", HasKey: true, Value: `"drank"`}
+	inherited7 := InheritSlots(prevValue, Slots{})
+	if inherited7.Value != `"drank"` {
+		t.Error("should inherit value when current is empty")
+	}
+	kept := InheritSlots(prevValue, Slots{Value: "2l"})
+	if kept.Value != "2l" {
+		t.Error("should keep current value")
+	}
 }