Work out which slot is missing and phrase one short question

A table per intent (reminder needs a time, fact needs a key, act needs a fn)
plus one fixed Russian question per slot. Templates, not model output: a 0.8B
would wander and a question that rewords itself is harder to answer. Note,
query, chat and system get no question — for those a clarify decision keeps
the canned reply rather than inventing a question for noise.

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

cmd/mavend/clarify.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"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
+}