// Package main is mavend's voice wiring + reactive handler.
//
// Two responsibilities for the audio path:
//
//  1. CONSTRUCTION: read cfg.Voice, build the stt/tts/transcribers (Stub
//     in-process by default, Remote via worker socket when configured),
//     the router (stage-0 grammar + HashEmbedder classifier seeded with
//     floor examples — production swaps in the ONNX multilingual model
//     later), the voice TCP listener, the sessions registry, the
//     voicesink, and wire the voicesink into the dispatcher's Voice slot.
//
//  2. HANDLER: a concrete voice.Handler that processes PushToTalk
//     requests: stt → router → action → replier → tts → reply. The
//     handler is what makes the audio round-trip "live". It wires to the
//     CoreAPI in-process (the daemon already has it as ipc.NewStoreAPI(st)
//     for module-IPC — the reactive path uses the same CoreAPI off the
//     same store; both are the "core = the only key-holder" path through
//     the daemon-embedded adapter).
//
// The "actions" handled today (per spec order; some deferred):
//
//   - IntentFact: WriteFact via CoreAPI. The router's Slots.Key/Value feed
//     the write; Source = "tap:voice" (the voice path is a tap, value=1.0
//     confidence — the user said it out loud, maven trusts the capture).
//   - IntentReminder: CreateReminder via CoreAPI. The router already
//     resolved relative→absolute at capture ("in 4h" → fire_ts); the
//     CoreAPI stores it as-is.
//   - IntentAct: the tool executor runs the matched fn against the store's
//     ENABLED allowlist (internal/tool). A verb not on it is scaffolded as a
//     'proposed' tool a human enables on the authed mavweb surface (never
//     voice). Destructive tools run only after a spoken confirm turn.
//   - IntentNote: chroma/vector-store deferred. The handler replies
//     "saved" without persisting — a stub on the way to chroma.
//   - IntentQuery: RAG-over-chroma deferred. The handler replies "I'll
//     look that up later" — same shape as the other deferred slots.
//   - Clarify: the router's stage-3 confidence gate fired; reply "didn't
//     catch that, can you rephrase?"
//
// The Replier (voice.StubReplier today) renders the reply TEXT across all
// these branches. The TTS synthesiser (tts.Stub today) renders that text
// to audio. The PushToTalkResp carries BOTH so the client can play (audio)
// AND log (text) for tests asserting the round-trip.
package main

import (
	"bufio"
	"context"
	"encoding/json"
	"errors"
	"fmt"
	"log"
	"os"
	"path/filepath"
	"strconv"
	"strings"
	"sync"
	"time"

	hexisclient "github.com/kami/hexis/pkg/client"
	"github.com/kami/maven/internal/audio"
	"github.com/kami/maven/internal/config"
	"github.com/kami/maven/internal/delivery"
	"github.com/kami/maven/internal/delivery/voicesink"
	"github.com/kami/maven/internal/dialogue"
	"github.com/kami/maven/internal/ipc"
	"github.com/kami/maven/internal/llm"
	"github.com/kami/maven/internal/memory"
	"github.com/kami/maven/internal/pattern"
	"github.com/kami/maven/internal/phraser"
	"github.com/kami/maven/internal/router"
	"github.com/kami/maven/internal/store"
	"github.com/kami/maven/internal/stt"
	"github.com/kami/maven/internal/tool"
	"github.com/kami/maven/internal/tts"
	"github.com/kami/maven/internal/ttsnorm"
	"github.com/kami/maven/internal/voice"
	"github.com/kami/maven/internal/weather"
	"github.com/kami/maven/internal/worker"
)

// voiceWiring — everything the daemon needs to run the audio path. Held by
// cmd/mavend/main.go alongside the other wirings; closed on shutdown.
type voiceWiring struct {
	server    *voice.Server
	sessions  *voice.Sessions
	voiceSink delivery.Sink
	embedder  router.Embedder
	handler   *reactiveHandler // the reactive handler for IPC Chat
	// worker clients (set when configured as Remote): closed on shutdown so
	// mavsttd / mavttsd don't keep a stale conn into a restarting daemon.
	sttClient *worker.Client
	ttsClient *worker.Client
}

// close releases the listener + worker conns. Safe to call on nil (when
// voice is not wired — wireVoice returns nil,nil).
func (w *voiceWiring) close() {
	if w == nil {
		return
	}
	if w.embedder != nil {
		_ = w.embedder.Close()
	}
	if w.server != nil {
		_ = w.server.Close()
	}
	if w.sttClient != nil {
		_ = w.sttClient.Close()
	}
	if w.ttsClient != nil {
		_ = w.ttsClient.Close()
	}
}

// wireVoice builds the audio path from cfg + a CoreAPI + a router. Returns
// nil wiring + nil error when voice isn't enabled (the caller's voice sink
// stays nil; the dispatcher's ChannelVoice routing drops silently).
//
// When voice is enabled, MUST wire a voicesink into the dispatcher's Voice
// slot using w.sessions (the caller does that — see main.go).
func wireVoice(cfg *config.Config, coreAPI ipc.CoreAPI, phr phraser.Phraser, memStore memory.Store, dataStore *store.Store, eco *ecosystemWiring) (*voiceWiring, error) {
	if cfg.Voice == nil || !cfg.Voice.Enabled {
		return nil, nil
	}
	w := &voiceWiring{}

	// ----- stt (Stub in-process OR Remote via worker socket) -----
	var transcriber stt.Transcriber
	if cfg.Voice.Stt != nil && cfg.Voice.Stt.Socket != "" {
		c := worker.Dial(cfg.Voice.Stt.Socket)
		w.sttClient = c
		lang := cfg.Voice.Stt.Lang
		if lang == "" {
			lang = cfg.Voice.Lang
		}
		transcriber = stt.NewRemote(c, lang)
	} else {
		transcriber = stt.NewStub()
	}

	// ----- tts (Stub in-process OR Remote) -----
	var synthesizer tts.Synthesizer
	if cfg.Voice.Tts != nil && cfg.Voice.Tts.Socket != "" {
		c := worker.Dial(cfg.Voice.Tts.Socket)
		w.ttsClient = c
		lang := cfg.Voice.Tts.Lang
		if lang == "" {
			lang = cfg.Voice.Lang
		}
		synthesizer = tts.NewRemote(c, lang, cfg.Voice.Tts.Voice)
	} else {
		synthesizer = tts.NewStub()
	}

	// ----- router: embedder (ONNX when configured, floor HashEmbedder otherwise) -----
	var emb router.Embedder
	if cfg.Voice.Embedder != nil {
		onnx, err := router.NewONNXEmbedder(
			cfg.Voice.Embedder.ModelPath,
			cfg.Voice.Embedder.TokenizerPath,
			cfg.Voice.Embedder.LibPath,
		)
		if err != nil {
			w.close()
			return nil, fmt.Errorf("embedder: %w", err)
		}
		log.Printf("voice: onnx embedder loaded (%d dim)", onnx.Dim())
		emb = onnx
	} else {
		log.Printf("voice: embedder not configured, using HashEmbedder floor")
		emb = router.NewHashEmbedder(1024)
	}
	w.embedder = emb

	// ----- tool executor (the enabled act allowlist, store-backed) -----
	// Config tools are the declarative bootstrap: seed them into the store as
	// enabled (editing mavend.json IS the human enable act). Ad-hoc tools are
	// enabled later through the authed mavweb surface. The executor + matcher
	// both read the store live, so a newly-enabled tool is runnable without a
	// daemon restart.
	seedTools(coreAPI, cfg.Voice.Tools)
	exec := tool.NewExecutor(coreAPI, time.Duration(cfg.Voice.ToolTimeout))
	matcher := tool.NewMatcher(coreAPI)

	// ----- weather provider (Open-Meteo when configured, Stub otherwise) -----
	var weatherProvider weather.Provider
	var weatherLocation string
	if cfg.Voice.Weather != nil && cfg.Voice.Weather.Provider == "open-meteo" {
		weatherProvider = weather.NewOpenMeteoProvider()
		weatherLocation = cfg.Voice.Weather.DefaultLocation
		log.Printf("voice: weather provider: open-meteo (default location: %s)", cfg.Voice.Weather.DefaultLocation)
	} else {
		weatherProvider = weather.NewStubProvider()
		log.Printf("voice: weather provider: stub (not configured)")
	}

	// The replier uses the same llama-server as the phraser.
	var llmClient *llm.Client
	if lp, ok := phr.(*phraser.LLMPhraser); ok {
		llmClient = llm.New(lp.BaseURL(), 60*time.Second)
	}
	// LLM router disabled — the classifier handles routing reliably.

	// ----- router (the cascade; floor examples seed the classifier) -----
	// The act matcher's allowlist is exactly the enabled tool names — the
	// router only matches acts the executor can run (one source of truth).
	threshold := cfg.Voice.RouterThreshold
	if threshold <= 0 {
		threshold = config.DefaultRouterThreshold
	}
	rtr := buildRouter(emb, matcher, threshold, nil) // LLM router disabled

	// ----- sessions registry (shared with voicesink) -----
	sessions := voice.NewSessions()
	w.sessions = sessions

	// ----- voice sink (proactive nudges: dispatcher → voicesink → tts → push to client) -----
	w.voiceSink = voicesink.New(synthesizer, sessions)

	// ----- memory (long-term vector storage) -----
	// Persistent (store-backed, survives restarts) when the daemon passes one;
	// falls back to the in-memory floor otherwise (tests / no-store paths).
	if memStore == nil {
		memStore = memory.NewInMemoryStore()
	}

	// ----- dialogue (multi-turn slot carry-over; 2-min follow-up window) -----
	dialogueSessions := dialogue.NewSessionStore(2 * time.Minute)

	// ----- replier (LLM-backed when the engine is on, Stub floor otherwise) -----
	replier := voice.Replier(voice.NewStubReplier())
	if llmClient != nil {
		replier = newLLMReplier(llmClient)
	}

	// ----- the handler (the reactive path; closes over stt / tts / router / coreAPI / memory) -----
	h := &reactiveHandler{
		stt:              transcriber,
		tts:              synthesizer,
		router:           rtr,
		embedder:         emb,
		api:              coreAPI,
		tools:            exec,
		matcher:          matcher,
		replier:          replier,
		phraser:          phr,
		now:              time.Now,
		weatherProvider:  weatherProvider,
		weatherLocation:  weatherLocation,
		memStore:         memStore,
		dataStore:        dataStore,
		dialogueSessions: dialogueSessions,
		queryMinScore:    cfg.Voice.QueryMinScore,
		timeParser:       router.NewPythonDateParser(),
		ecosystem:        eco,
	}

	// ----- the server (TCP listener) -----
	srv := voice.NewServer(cfg.Voice.Bind, h, sessions)
	if err := srv.Listen(); err != nil {
		w.close()
		return nil, fmt.Errorf("voice listen: %w", err)
	}
	w.server = srv
	w.handler = h

	return w, nil
}

// reactiveHandler — voice.Handler implementation. One method: turn a
// PushToTalkReq into a reply (audio + text). The handler is concurrency-
// safe (the wired stt/tts/router/api all are); called from per-conn
// goroutines on the voice.Server.
type reactiveHandler struct {
	stt      stt.Transcriber
	tts      tts.Synthesizer
	router   *router.Router
	embedder router.Embedder // reused for note write/query (same model as the classifier)
	api      ipc.CoreAPI
	tools    *tool.Executor
	matcher  *tool.Matcher
	phraser  phraser.Phraser
	replier  voice.Replier
	now      func() time.Time

	weatherProvider weather.Provider
	weatherLocation string // default location for weather queries

	memStore  memory.Store
	dataStore *store.Store // direct store access for event extraction + pattern detection

	// queryMinScore — the note-recall confidence gate. Top cosine below this ⇒
	// "I don't know" instead of a guess. Tuned for the ONNX embedder; a knob, not
	// load-bearing math (same posture as the presence thresholds). Set by
	// wireVoice from VoiceConfig; default 0.55.
	queryMinScore float64

	// timeParser — used as a fallback for stage-0 reminder grammar matches
	// (where the extractor didn't run). Shared with the router's extractor.
	// The production dateparser will replace StubDateTimeParser here too.
	timeParser router.DateTimeParser

	// dialogueSessions carries slots across turns for follow-ups (single-user
	// box → one session slot, keyed voiceDialogueID). nil ⇒ no carry-over.
	dialogueSessions *dialogue.SessionStore

	// 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
	// while one waits overwrites it (last-asked wins); expires after confirmTTL.
	mu             sync.Mutex
	pending        *pendingAct
	pendingRoutine *pendingRoutineConfirm // routine proposal awaiting y/n
	pendingHexis   *pendingHexisExec      // mutating Hexis capability awaiting y/n

	ecosystem *ecosystemWiring // nexus + hexis + praxis clients
}

// pendingHexisExec — a mutating Hexis capability parked awaiting a spoken
// confirm. The confirmation is bound to the resolved capability + canonical
// target entity so a later "да" can only execute exactly what was proposed
// (ecosystem invariant: protected actions require bound confirmation).
type pendingHexisExec struct {
	capabilityID string
	capName      string
	entityID     string
	displayName  string
	expiry       time.Time
}

// pendingRoutineConfirm — a proposed routine awaiting a spoken y/n to become
// a recurring reminder. Set by detectPattern after creating a proposal.
type pendingRoutineConfirm struct {
	routineID int64
	action    string
	object    string
	interval  float64
	phrase    string
	expiry    time.Time
}

// pendingAct — a destructive act awaiting a spoken confirm.
type pendingAct struct {
	fn     string
	args   []string
	phrase string
	expiry time.Time
}

// confirmTTL — how long a parked destructive confirm stays answerable. Short:
// a confirm is a same-breath gesture; a stale prompt shouldn't fire on an
// unrelated later "да".
const confirmTTL = 90 * time.Second

// HandlePushToTalk — the full reactive round-trip. Each step's failure
// surfaces as a short reply text + empty audio OR an error; the voice
// server translates an error into a wire RpcError. Today the handler
// prefers a canned error-reply over an error return (a user-facing "didn't
// catch that" is better than a wire error the client surfaces as
// "internal"); the only error returned is a synthesizer fault (no audio
// to ship back).
func (h *reactiveHandler) HandlePushToTalk(ctx context.Context, req voice.PushToTalkReq, _ uint64) (voice.PushToTalkResp, error) {
	// 1. stt — transcribe the audio.
	text, _, err := h.stt.Transcribe(ctx, req.Audio)
	if err != nil {
		log.Printf("voice: stt error: %v", err)
		return h.reply(ctx, "не получилось разобрать речь — попробуй ещё раз.", nil)
	}
	if text == "" {
		return h.reply(ctx, "ничего не услышала — попробуй ещё раз.", nil)
	}
	log.Printf("voice: stt → %q", text)

	// 1b. confirm turn — if a destructive act is parked, this utterance is its
	// y/n answer, not a fresh command. Handled before routing so "да" doesn't
	// get classified as some other intent.
	if reply, handled := h.resolveConfirm(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
	// before routing. Same pattern as the confirm turn above.
	if reply, handled := h.resolveQuietToggle(ctx, text); handled {
		return h.reply(ctx, reply, nil)
	}

	// 2. router — classify the utterance.
	dec, err := h.router.Route(ctx, text, h.now())
	if err != nil {
		// ErrNoIntents ⇒ classifier unseeded (cold boot). reply with a
		// "still warming up" rather than a wire error.
		if errors.Is(err, router.ErrNoIntents) {
			return h.reply(ctx, "я ещё не понимаю свободную речь — скоро научусь.", nil)
		}
		log.Printf("voice: router error: %v", err)
		return h.reply(ctx, "не получилось разобрать команду.", nil)
	}

	// 2b. dialogue — fill this turn's missing slots from a prior same-intent
	// turn (follow-ups like «напомни завтра» → «…позвонить маме»), then remember
	// this turn for the next follow-up. Only same-intent, non-expired, non-
	// clarify turns carry (see followUpMerge). Best-effort: nil store ⇒ skipped.
	if h.dialogueSessions != nil {
		now := h.now()
		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,
			})
		}
	}

	// 3. action — execute the decision's intent. errors here surface as
	// short reply text (the user wants to know the action didn't land);
	// the round-trip stays alive.
	replyText := h.applyAction(ctx, dec)

	// 4. replier — phrase the reply across the router decision.
	if replyText == "" {
		replyText = h.replier.Reply(dec)
	}

	// 5. tts — synthesise the reply text; return to the voice server which
	// ships it back on the conn.
	return h.reply(ctx, replyText, nil)
}

// handleText — the core reactive path without stt/tts: confirm check →
// route → dialogue → action → replier. Used by the IPC Chat endpoint
// (and eventually by telegram). Splits out the audio bookends from
// HandlePushToTalk so text channels share the same routing logic.
func (h *reactiveHandler) handleText(ctx context.Context, text string) string {
	log.Printf("voice: handleText: %q", text)
	// 1b. confirm turn — if a destructive act is parked, this utterance is its
	// y/n answer. Same check as HandlePushToTalk.
	if reply, handled := h.resolveConfirm(ctx, text); handled {
		return reply
	}

	// 2. router — classify the utterance.
	dec, err := h.router.Route(ctx, text, h.now())
	if err != nil {
		if errors.Is(err, router.ErrNoIntents) {
			return "я ещё не понимаю свободную речь — скоро научусь."
		}
		log.Printf("voice: handleText router error: %v", err)
		return "не получилось разобрать команду."
	}
	log.Printf("voice: route result: intent=%s slots=%+v", dec.Intent, dec.Slots)

	// 2b. dialogue — same as HandlePushToTalk.
	if h.dialogueSessions != nil {
		now := h.now()
		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,
			})
		}
	}

	// 3. action — execute the decision's intent.
	replyText := h.applyAction(ctx, dec)
	log.Printf("voice: applyAction returned: %q", replyText)

	// 4. replier — phrase the reply when applyAction returned "".
	if replyText == "" {
		replyText = h.replier.Reply(dec)
	}
	return replyText
}

// applyAction — executes the router's Decision. Intent-by-intent:
//
//   - IntentFact: WriteFact via CoreAPI. Source = "tap:voice" (a voice
//     capture is a tap; confidence 1.0).
//   - IntentReminder: CreateReminder via CoreAPI.
//   - IntentAct: tool-executor deferred (no-op today; the reply says so).
//   - IntentNote / IntentQuery: chroma/RAG deferred (no-op; reply says so).
//   - Clarify: the router's stage-3 fired; no action.
//
// Returns "" when the Replier should phrase the reply (the default path);
// returns a non-empty string when the action path wants to OVERRIDE the
// reply text (e.g. an action error the user should hear SPECIFICALLY, not
// a generic "ok"). Errors surface as a short reply text the user hears.
func (h *reactiveHandler) applyAction(ctx context.Context, dec router.Decision) string {
	if dec.Clarify {
		return "" // the Replier phrases clarify
	}
	switch dec.Intent {
	case router.IntentFact:
		if !dec.Slots.HasKey {
			return "не разобрала, что записать — попробуй иначе."
		}
		now := h.now()
		req := ipc.WriteFactReq{
			Ts:         now,
			Kind:       "self",
			Key:        dec.Slots.Key,
			Value:      dec.Slots.Value,
			Source:     "tap:voice",
			Confidence: 1.0,
			// Subject: the key doubles as the entity-resolution candidate —
			// a voice-tapped fact's key is usually the thing/person it's
			// about ("espresso_machine", "kate"), so queueing it for Nexus
			// resolution costs one async lookup and is a no-op (not_found)
			// for the abstract self-state keys (mood, water) that aren't
			// entities at all.
			Subject: dec.Slots.Key,
		}
		factID, err := h.api.WriteFact(ctx, req)
		if err != nil {
			log.Printf("voice: write fact: %v", err)
			return "не получилось сохранить факт."
		}
		// Index the fact utterance in long-term memory (best-effort, must not
		// fail the fact write). Facts aren't in the notes table, so this is the
		// only recall path for them — "когда я пил воду?" reads back from here.
		if h.memStore != nil {
			if vec, err := h.embedder.Embed(ctx, dec.Utterance); err != nil {
				log.Printf("voice: embed fact for memory: %v", err)
			} else if err := h.memStore.Insert(ctx, "fact:"+dec.Slots.Key+":"+strconv.FormatInt(now.Unix(), 10), vec, map[string]string{
				"source": "voice",
				"type":   "fact",
				"text":   dec.Utterance,
				"ts":     strconv.FormatInt(now.Unix(), 10),
			}); err != nil {
				log.Printf("voice: memory insert fact: %v", err)
			}
		}
		// Event extraction + pattern detection (best-effort, must not fail the
		// fact write). If the fact describes a recognizable action, it becomes a
		// normalized event; if ≥3 events for the same action+object show stable
		// intervals, a proposed routine is created and parked for confirmation.
		if h.dataStore != nil {
			if phrase := h.detectPattern(ctx, factID, dec.Slots.Key, dec.Slots.Value, now); phrase != "" {
				return phrase // "ты заправляешь ... напоминать?"
			}
		}
		return "" // replier phrases the success reply

	case router.IntentReminder:
		if !dec.Slots.HasTime {
			// Stage-0 (reminder-wakeword grammar) skips the extractor, so the
			// time wasn't parsed. Run the parser as a fallback.
			if dec.Stage == 0 && h.timeParser != nil {
				t, ok, err := h.timeParser.Parse(ctx, dec.Utterance, h.now())
				if err == nil && ok {
					dec.Slots.Time = t
					dec.Slots.HasTime = true
				}
			}
			if !dec.Slots.HasTime {
				return "не получилось разобрать время напоминания."
			}
		}
		payload := `{"text":` + jsonString(dec.Utterance) + `}`
		if _, err := h.api.CreateReminder(ctx, dec.Slots.Time, payload, ""); err != nil {
			log.Printf("voice: create reminder: %v", err)
			return "не получилось поставить напоминание."
		}
		return ""

	case router.IntentAct:
		// tool executor: run the matched fn against the enabled allowlist.
		// HasFn=false ⇒ try the matcher (for LLM-routed acts where the verb
		// didn't go through the stage-0 act grammar).
		if !dec.Slots.HasFn && dec.Slots.Text != "" && h.matcher != nil {
			if fn, args, ok := h.matcher.Match(dec.Slots.Text); ok {
				dec.Slots.Fn, dec.Slots.Args, dec.Slots.HasFn = fn, args, true
			}
		}

		// Praxis ecosystem tools: intercept before the system command executor.
		if h.ecosystem != nil && h.ecosystem.praxis != nil && dec.Slots.HasFn {
			if reply := h.handlePraxisAct(ctx, dec); reply != "" {
				return reply
			}
		}

		// Hexis ecosystem action: if ecosystem is configured and we have a verb
		// + entity text, try to resolve the entity and execute via Hexis.
		if h.ecosystem != nil && h.ecosystem.hexis != nil && dec.Slots.Text != "" {
			if reply := h.handleHexisAct(ctx, dec); reply != "" {
				return reply
			}
		}

		// HasFn still false ⇒ no allowlist match: scaffold a 'proposed' tool
		// the user can enable on the authed surface ("earn the right to ask").
		if !dec.Slots.HasFn {
			return h.proposeGap(ctx, dec)
		}
		out, err := h.tools.Exec(ctx, dec.Slots.Fn, dec.Slots.Args, false)
		if err != nil {
			switch {
			case errors.Is(err, tool.ErrNeedsConfirm):
				// destructive: park it and ask. The next utterance answers.
				phrase := actPhrase(dec.Slots.Fn, dec.Slots.Args)
				h.park(dec.Slots.Fn, dec.Slots.Args, phrase)
				return "выполнить «" + phrase + "»? скажи «да» или «нет»."
			case errors.Is(err, tool.ErrNotEnabled):
				return h.proposeGap(ctx, dec)
			}
			log.Printf("voice: tool %s: %v", dec.Slots.Fn, err)
			if out != "" {
				return "не получилось выполнить команду: " + firstLine(out)
			}
			return "не получилось выполнить команду."
		}
		if out != "" {
			return "готово: " + firstLine(out)
		}
		return "готово."

	case router.IntentChat:
		// Conversational: build history from dialogue session (prior user turns)
		// and let the LLM respond from general knowledge + context.
		history := h.chatHistory()
		reply, err := h.phraser.PhraseChat(ctx, dec.Utterance, history)
		if err != nil {
			log.Printf("voice: chat: %v", err)
			return "поговорили."
		}
		return reply

	case router.IntentSystem:
		return h.replySystem(ctx, dec)

	case router.IntentNote:
		// embed the note text with the same model the classifier uses, persist
		// via CoreAPI (source=tap:voice). Semantic recall lives in `notes`, not
		// facts — no predicate reads it (spec's two-memory split).
		vec, err := h.embedder.Embed(ctx, dec.Utterance)
		if err != nil {
			log.Printf("voice: embed note: %v", err)
			return "не получилось сохранить заметку."
		}
		noteTs := h.now()
		noteID, err := h.api.WriteNote(ctx, noteTs, dec.Utterance, vec, "tap:voice")
		if err != nil {
			log.Printf("voice: write note: %v", err)
			return "не получилось сохранить заметку."
		}
		// Insert into long-term memory (best-effort, must not fail the note write).
		// text/ts in the meta make a Search hit self-describing (see bestRecall).
		if h.memStore != nil {
			if err := h.memStore.Insert(ctx, "note:"+strconv.FormatInt(noteID, 10), vec, map[string]string{
				"source": "voice",
				"type":   "note",
				"text":   dec.Utterance,
				"ts":     strconv.FormatInt(noteTs.Unix(), 10),
			}); err != nil {
				log.Printf("voice: memory insert: %v", err)
			}
		}
		return "" // replier phrases the "saved" reply

	case router.IntentQuery:
		// Fact-by-key lookup: when the dialogue layer resolved an anaphoric
		// reference to a prior fact's key (e.g. "когда я это сделал?" after
		// "запиши что я пил воду"), look up the fact's value directly.
		if dec.Slots.HasKey && dec.Slots.Key != "" {
			if f, err := h.api.LatestFact(ctx, dec.Slots.Key); err == nil {
				if dec.Slots.HasTime {
					// The query asks about timing — the fact's own timestamp
					// is the answer it's looking for. Format as a natural reply.
					reply := fmt.Sprintf("я записала это %s", formatTime(f.Ts))
					return reply
				}
				// General fact reference: describe what we know.
				if dec.Utterance == "" {
					return fmt.Sprintf("вот что я знаю: %s — %s", dec.Slots.Key, f.Value)
				}
				// The utterance still carries the question; fall through to
				// normal RAG with the resolved key in context.
			}
		}

		// Calendar questions: "что у меня сегодня?", "планы на завтра?"
		if date, ok := router.ParseCalendarDate(dec.Utterance, time.Now()); ok {
			events, err := h.api.CalendarEvents(ctx, date, date.Add(24*time.Hour))
			if err != nil {
				log.Printf("voice: calendar events: %v", err)
				return "не получилось проверить календарь."
			}
			values := make([]string, len(events))
			for i, e := range events {
				values[i] = e.Value
			}
			var f router.CalendarEventFormatter
			return f.Format(values, date)
		}

		// Weather questions
		if isWeatherQuery(dec.Utterance) {
			loc := extractWeatherLocation(dec.Utterance, h.weatherLocation)
			ctxWT, cancel := context.WithTimeout(ctx, 5*time.Second)
			defer cancel()
			w, err := h.weatherProvider.CurrentWeather(ctxWT, loc)
			if errors.Is(err, weather.ErrNotConfigured) {
				return "погода не настроена."
			}
			if err != nil {
				log.Printf("voice: weather: %v", err)
				return "не получилось узнать погоду."
			}
			return fmt.Sprintf("в %s сейчас %.0f градусов, %s.", w.Location, w.Temperature, w.Condition)
		}

		vec, err := h.embedder.Embed(ctx, dec.Utterance)
		if err != nil {
			log.Printf("voice: embed query: %v", err)
			return "не получилось найти ответ."
		}
		notes, err := h.api.QueryNotes(ctx, vec, 5)
		if err != nil {
			log.Printf("voice: query notes: %v", err)
			return "не получилось найти ответ."
		}
		// Confidence gate: below threshold, say "I don't know" rather than read
		// back the least-unrelated note — a confident wrong recall is worse than
		// a gap (spec's "not a guesser-of-truth"). Same instinct as the loop's
		// since(key)==null → don't fire. Tuned for the ONNX embedder; the Hash
		// floor scores lexically and may rarely clear it.
		if len(notes) == 0 || notes[0].Score < h.queryMinScore {
			// Long-term memory recall (notes + facts) before general knowledge:
			// the notes table can't answer fact questions, but the memory store
			// indexes both. Only runs when notes-RAG already gave up → additive.
			if h.memStore != nil {
				if hits, herr := h.memStore.Search(ctx, vec, 3); herr == nil {
					if text, ok := bestRecall(hits, h.queryMinScore); ok {
						return text
					}
				}
			}
			// Try general knowledge from the phraser before giving up
			reply, err := h.phraser.PhraseQuery(ctx, dec.Utterance, nil)
			if err != nil || reply == "" {
				return "не знаю."
			}
			return reply
		}
		texts := make([]string, len(notes))
		for i, n := range notes {
			texts[i] = n.Text
		}
		reply, err := h.phraser.PhraseQuery(ctx, dec.Utterance, texts)
		if err != nil {
			log.Printf("voice: phrase query: %v", err)
		}
		if reply == "" {
			reply = "вот что я нашла: " + texts[0]
		}
		return reply
	}
	return ""
}

// detectPattern extracts an event from the written fact and runs the pattern
// detector. If a stable recurring pattern is found and no proposed routine
// exists for this action+object yet, one is created and the user is prompted
// to confirm via the park() mechanism. Returns the suggestion phrase when a
// new proposal was created and parked; "" otherwise.
func (h *reactiveHandler) detectPattern(ctx context.Context, factID int64, key, value string, ts time.Time) string {
	ev := pattern.Extract(factID, key, value, ts)
	if ev == nil {
		return "" // not an actionable event
	}
	if _, err := h.dataStore.CreateEvent(ctx, factID, ev.Action, ev.Object, ts); err != nil {
		log.Printf("voice: create event: %v", err)
		return ""
	}
	events, err := h.dataStore.EventsFor(ctx, ev.Action, ev.Object)
	if err != nil {
		log.Printf("voice: events for %s/%s: %v", ev.Action, ev.Object, err)
		return ""
	}
	// Convert store.Events to pattern.Events for the detector.
	patEvents := make([]pattern.Event, len(events))
	for i, e := range events {
		patEvents[i] = pattern.Event{
			FactID: e.FactID,
			Action: e.Action,
			Object: e.Object,
			Ts:     e.Ts,
		}
	}
	r, err := pattern.Detect(patEvents)
	if err != nil {
		log.Printf("voice: pattern detect: %v", err)
		return ""
	}
	if r == nil {
		return "" // not enough data or intervals too irregular
	}
	// Check if already proposed/accepted/dismissed for this pair.
	existing, err := h.dataStore.LookupProposedRoutine(ctx, r.Action, r.Object)
	if err != nil {
		log.Printf("voice: lookup proposed routine: %v", err)
		return ""
	}
	if existing != nil {
		return "" // already proposed, accepted, or dismissed
	}
	id, err := h.dataStore.CreateProposedRoutine(ctx, r.Action, r.Object, r.IntervalDays, ts)
	if err != nil {
		log.Printf("voice: create proposed routine: %v", err)
		return ""
	}
	log.Printf("voice: proposed routine: %s/%s every %.1f days", r.Action, r.Object, r.IntervalDays)

	// Park the proposal for voice confirmation.
	phrase := pattern.PhraseRoutine(r)
	h.mu.Lock()
	h.pendingRoutine = &pendingRoutineConfirm{
		routineID: id,
		action:    r.Action,
		object:    r.Object,
		interval:  r.IntervalDays,
		phrase:    phrase,
		expiry:    ts.Add(confirmTTL),
	}
	h.mu.Unlock()
	return phrase
}

var ruWeekdays = []string{
	"воскресенье", "понедельник", "вторник", "среда",
	"четверг", "пятница", "суббота",
}

var ruMonths = []string{
	"января", "февраля", "марта", "апреля", "мая", "июня",
	"июля", "августа", "сентября", "октября", "ноября", "декабря",
}

func ruPlural(n int, one, two, many string) string {
	n = n % 100
	if n > 10 && n < 20 {
		return many
	}
	n = n % 10
	switch n {
	case 1:
		return one
	case 2, 3, 4:
		return two
	default:
		return many
	}
}

// resolveQuietToggle — pre-route keyword check. Returns (reply, true) when
// the utterance is a quiet-on/off command; ("", false) otherwise. Called from
// HandlePushToTalk BEFORE the router so a classifier miscue can't drop it.
func (h *reactiveHandler) resolveQuietToggle(ctx context.Context, text string) (string, bool) {
	u := strings.ToLower(strings.TrimSpace(text))
	var on, off bool
	// Match as whole-token phrases so "тихий" in "тихий режим включи" still
	// catches, but "тихий" alone in "очень тихий сегодня день" doesn't fire.
	// The confirm turn is handled above, so "да"/"нет" won't reach here.
	for _, kw := range []string{"quiet on", "quiet mode", "тихий режим", "тихий", "не шуми", "не беспокоить", "тихо"} {
		if strings.Contains(u, kw) {
			on = true
			break
		}
	}
	if !on {
		for _, kw := range []string{"quiet off", "quiet end", "громкий режим", "шумный режим", "отмени тихий", "выключи тихий", "не тихо"} {
			if strings.Contains(u, kw) {
				off = true
				break
			}
		}
	}
	if !on && !off {
		return "", false
	}
	val := "false"
	reply := "тихий режим выключен."
	if on {
		val = "true"
		reply = "тихий режим включён. буду реже напоминать."
	}
	if _, err := h.api.WriteFact(ctx, ipc.WriteFactReq{
		Ts:         h.now(),
		Kind:       "config",
		Key:        "quiet_hours",
		Value:      val,
		Source:     "tap:voice",
		Confidence: 1.0,
	}); err != nil {
		log.Printf("voice: write quiet_hours: %v", err)
		return "не получилось переключить тихий режим.", true
	}
	return reply, true
}

// replySystem answers system-observable queries using the handler's clock
// and (in future) system interfaces. The decision's utterance is parsed
// for keywords to determine what the user is asking about.
func (h *reactiveHandler) replySystem(ctx context.Context, dec router.Decision) string {
	u := strings.ToLower(dec.Utterance)
	now := h.now()

	// stage-0 grammars catch the exact time/date patterns, but duration
	// queries ("сколько времени прошло") bypass the grammar's build filter
	// and can reach replySystem via the classifier path. Guard against them.
	if hasDurationWords(u) {
		return "пока не умею отвечать на этот вопрос."
	}

	switch {
	case strings.Contains(u, "час") || strings.Contains(u, "врем"):
		h := now.Hour()
		m := now.Minute()
		hourWord := ruPlural(h, "час", "часа", "часов")
		if m == 0 {
			return fmt.Sprintf("сейчас %d %s ровно", h, hourWord)
		}
		minWord := ruPlural(m, "минута", "минуты", "минут")
		return fmt.Sprintf("сейчас %d %s %d %s", h, hourWord, m, minWord)
	case strings.Contains(u, "день") || strings.Contains(u, "числ"):
		dow := ruWeekdays[now.Weekday()]
		month := ruMonths[now.Month()-1]
		return fmt.Sprintf("сегодня %s, %d %s %d года", dow, now.Day(), month, now.Year())
	case strings.Contains(u, "кто дома") || strings.Contains(u, "человек дома"):
		return "присутствие пока не подключено к голосовому запросу."
	case strings.Contains(u, "памят") || strings.Contains(u, "процессор") || strings.Contains(u, "загрузк") || strings.Contains(u, "статус") || strings.Contains(u, "работа") || strings.Contains(u, "сервис") || strings.Contains(u, "диск") || strings.Contains(u, "ip") || strings.Contains(u, "аптайм") || strings.Contains(u, "трафик") || strings.Contains(u, "интернет"):
		return "системная статистика пока не подключена."
	default:
		return "пока не умею отвечать на этот вопрос."
	}
}

// chatHistory collects dialogue turns from the session store for the current
// conversation. Returns prior user utterances (newest last) up to a depth of
// 4 turns. Returns nil when there's no session or no history.
func (h *reactiveHandler) chatHistory() []dialogue.Turn {
	if h.dialogueSessions == nil {
		return nil
	}
	now := h.now()
	prev := h.dialogueSessions.Get(voiceDialogueID, now)
	if prev == nil {
		return nil
	}
	// History already includes the immediate prior turn (set by the dialogue
	// merge at lines 373-395), plus up to 3 more from deeper history.
	out := make([]dialogue.Turn, 0, 1+len(prev.History))
	out = append(out, dialogue.Turn{
		Intent: prev.Intent,
		Slots:  prev.Slots,
		Text:   prev.Slots.Text,
	})
	out = append(out, prev.History...)
	return out
}

// hasDurationWords checks whether u is asking about elapsed/remaining time
// rather than the current clock — guards replySystem from replying "сейчас
// X часов" to "сколько времени прошло". Mirrors the stage0.go build filter.
func hasDurationWords(u string) bool {
	s := strings.ToLower(strings.TrimSpace(u))
	// First-word duration markers (same keywords as timeQueryBuild in stage0).
	first := strings.Fields(s)
	if len(first) > 0 {
		switch first[0] {
		case "прошло", "осталось", "пройдет", "минуло", "проходит":
			return true
		}
	}
	// Broader duration keywords appearing anywhere in the utterance.
	if strings.Contains(s, "прошло") || strings.Contains(s, "осталось") {
		return true
	}
	if strings.Contains(s, " до ") {
		return true
	}
	return false
}

// reply wraps a text reply through TTS to produce a PushToTalkResp. If TTS
// fails, the response carries an empty audio + the text — the client can
// still display text if it can't play. The routedChannels field is
// reserved for a future "the dispatcher also forwarded to ntfy/telegram"
// reply (today the reactive path doesn't dispatch nudges; that's the loop
// tick's job).
func (h *reactiveHandler) reply(ctx context.Context, text string, _ []string) (voice.PushToTalkResp, error) {
	spoken := ttsnorm.Speakable(text)
	log.Printf("voice: reply → %q", text)
	audioOut, err := h.tts.Synthesize(ctx, spoken)
	if err != nil {
		log.Printf("voice: tts error: %v", err)
		return voice.PushToTalkResp{ReplyText: text, ReplyAudio: audio.Audio{}}, nil
	}
	return voice.PushToTalkResp{ReplyText: text, ReplyAudio: audioOut}, nil
}

// buildRouter constructs the reactive-path router with the given embedder
// and confidence threshold.
//   - stage-0 grammars from DefaultActMatcher whose fn allowlist is exactly
//     the enabled tool names (actFns) — the router only matches acts the
//     executor can run. Empty ⇒ every act refuses at the matcher.
//   - The embedder is provided by wireVoice: HashEmbedder (floor) when no
//     embedder config is present, or the ONNX multilingual model when
//     configured — same interface, one constructor change.
//   - 6 bootstrap examples covering the 5 intents + one compound-capture
//     placeholder. Spec calls for ~10 per intent at production; this is the
//     bootstrapping floor swapped by tuning the seed set later.
//   - Threshold is from voice.router_threshold config (default 0.55).
func buildRouter(emb router.Embedder, acts router.ActMatcher, threshold float64, llmR *router.LLMRouter) *router.Router {
	cls := router.NewClassifier(emb)
	seedClassifier(cls)
	grammars := router.DefaultGrammars(acts)
	grammars = append(grammars, router.SystemTimeDateGrammars()...)
	grammars = append(grammars, router.ReminderGrammar())
	return router.New(router.Config{
		Grammars:   grammars,
		Classifier: cls,
		Extractor: router.Extractor{
			Time:  router.NewPythonDateParser(),
			Acts:  acts,
			Facts: router.DefaultFactParser{},
		},
		Threshold: threshold,
		LLM:       llmR,
	})
}

// seedDir is the directory containing intent seed files. Each file is named
// <intent>.txt and contains one training example per line (blank lines and
// lines starting with # are ignored). Relative to the working directory.
const seedDir = "models/seeds"

// seedClassifier floors the embedded examples so the cold-boot path
// doesn't return ErrNoIntents. Loads examples from seedDir — one file per
// intent (act.txt, reminder.txt, fact.txt, note.txt, query.txt). When the
// classifier can't decide it falls through to Clarify — the last-resort
// path asks the user to rephrase rather than guessing wrong.
func seedClassifier(c *router.Classifier) {
	intents := []router.Intent{
		router.IntentAct,
		router.IntentReminder,
		router.IntentFact,
		router.IntentNote,
		router.IntentQuery,
		router.IntentChat,
		router.IntentSystem,
	}
	total := 0
	for _, intent := range intents {
		n, err := loadSeedFile(c, intent)
		if err != nil {
			log.Printf("voice: seed %s: %v", intent, err)
			continue
		}
		total += n
	}
	log.Printf("voice: loaded %d seed examples from %s", total, seedDir)
}

func loadSeedFile(c *router.Classifier, intent router.Intent) (int, error) {
	path := filepath.Join(seedDir, string(intent)+".txt")
	f, err := os.Open(path)
	if err != nil {
		return 0, fmt.Errorf("open %s: %w", path, err)
	}
	defer f.Close()

	var count int
	sc := bufio.NewScanner(f)
	for sc.Scan() {
		line := strings.TrimSpace(sc.Text())
		if line == "" || strings.HasPrefix(line, "#") {
			continue
		}
		if err := c.AddExample(context.Background(), intent, line); err != nil {
			log.Printf("voice: seed %s: skipping %q: %v", intent, line, err)
			continue
		}
		count++
	}
	if err := sc.Err(); err != nil {
		return count, fmt.Errorf("scan %s: %w", path, err)
	}
	return count, nil
}

// handlePraxisAct — dispatches ecosystem tool acts through the Praxis tools API.
// Returns "" when the act is not a Praxis verb (the caller falls through to the
// system command executor). Returns a reply string otherwise.
func (h *reactiveHandler) handlePraxisAct(ctx context.Context, dec router.Decision) string {
	if h.ecosystem == nil || h.ecosystem.praxis == nil {
		return ""
	}
	px := h.ecosystem.praxis
	fn := dec.Slots.Fn

	// Map verbs and Russian aliases to Praxis tool calls.
	// Each case: if the verb matches, call the tool and return a user-facing reply.
	switch fn {
	case "list_attention", "attention", "внимание", "что требует внимания", "что нового":
		items, err := px.ListAttention(ctx, 20)
		if err != nil {
			log.Printf("ecosystem: praxis attention: %v", err)
			return "не могу сейчас узнать, что требует внимания."
		}
		if len(items) == 0 {
			return "ничего не требует внимания."
		}
		h.recordPraxisTrace(ctx, "list_attention", map[string]any{"count": len(items)})
		var parts []string
		for _, item := range items {
			title, _ := item["title"].(string)
			// importance arrives as JSON number ⇒ float64 over the HTTP contract.
			importance, _ := item["importance"].(float64)
			rule, _ := item["rule"].(string)
			s := title
			if importance > 0 {
				s += fmt.Sprintf(" (важность %d", int(importance))
				if rule != "" {
					s += ": " + rule
				}
				s += ")"
			}
			parts = append(parts, s)

			// Speaking an item surfaces it, it does not acknowledge it
			// (ECOSYSTEM-SPEC.md §2.3: surfaced != acknowledged). Best-effort:
			// a failed surface call must not block delivering the digest.
			if id, ok := item["id"].(string); ok && id != "" {
				if _, err := px.Surface(ctx, id); err != nil {
					log.Printf("ecosystem: praxis surface %s: %v", id, err)
				}
			}
		}
		return "требует внимания: " + strings.Join(parts, "; ")

	case "acknowledge_item", "принято", "понял", "поняла":
		id := dec.Slots.Value
		if id == "" {
			return "какой пункт отметить принятым?"
		}
		if _, err := px.Acknowledge(ctx, id); err != nil {
			log.Printf("ecosystem: praxis acknowledge %s: %v", id, err)
			return "не получилось отметить принятым."
		}
		h.recordPraxisTrace(ctx, "acknowledge", map[string]any{"item_id": id})
		return "принято."

	case "resolve_item", "сделано", "готово", "решено":
		id := dec.Slots.Value
		if id == "" {
			return "какой пункт отметить сделанным?"
		}
		if _, err := px.Resolve(ctx, id); err != nil {
			log.Printf("ecosystem: praxis resolve %s: %v", id, err)
			return "не получилось отметить сделанным."
		}
		h.recordPraxisTrace(ctx, "resolve", map[string]any{"item_id": id})
		return "отмечено как сделано."

	case "ignore_item", "игнорировать", "неважно":
		id := dec.Slots.Value
		if id == "" {
			return "какой пункт игнорировать?"
		}
		if _, err := px.Ignore(ctx, id); err != nil {
			log.Printf("ecosystem: praxis ignore %s: %v", id, err)
			return "не получилось проигнорировать."
		}
		h.recordPraxisTrace(ctx, "ignore", map[string]any{"item_id": id})
		return "проигнорировано."

	case "pin_item", "закрепить":
		id := dec.Slots.Value
		if id == "" {
			return "какой пункт закрепить?"
		}
		if _, err := px.Pin(ctx, id, true); err != nil {
			log.Printf("ecosystem: praxis pin %s: %v", id, err)
			return "не получилось закрепить."
		}
		h.recordPraxisTrace(ctx, "pin", map[string]any{"item_id": id})
		return "закреплено."

	case "list_changes", "changes", "изменения", "что изменилось":
		changes, err := px.ListChanges(ctx, 20)
		if err != nil {
			log.Printf("ecosystem: praxis changes: %v", err)
			return "не могу сейчас узнать об изменениях."
		}
		if len(changes) == 0 {
			return "нет изменений."
		}
		h.recordPraxisTrace(ctx, "list_changes", map[string]any{"count": len(changes)})
		var parts []string
		for _, c := range changes {
			title, _ := c["title"].(string)
			typ, _ := c["change_type"].(string)
			parts = append(parts, fmt.Sprintf("%s (%s)", title, typ))
		}
		return "изменения: " + strings.Join(parts, "; ")

	default:
		// Not a Praxis verb — let the caller fall through.
		return ""
	}
}

// recordPraxisTrace — writes a fact recording a cross-service ecosystem call.
// The fact is stored with source "praxis:trace" so the proactive loop can
// reference it and the dashboard can display recent ecosystem activity.
func (h *reactiveHandler) recordPraxisTrace(ctx context.Context, operation string, details map[string]any) {
	now := h.now()
	value := operation
	if len(details) > 0 {
		if b, err := json.Marshal(details); err == nil {
			value = operation + " " + string(b)
		}
	}
	_, _ = h.api.WriteFact(ctx, ipc.WriteFactReq{
		Ts:         now,
		Kind:       "system",
		Key:        "praxis:" + operation,
		Value:      value,
		Source:     "praxis:trace",
		Confidence: 1.0,
	})
}

// handleHexisAct — resolves entity references through Nexus and executes
// matching capabilities through Hexis. Returns a reply string when handled,
// or "" to fall through to the system command executor.
func (h *reactiveHandler) handleHexisAct(ctx context.Context, dec router.Decision) string {
	if h.ecosystem == nil {
		return ""
	}

	// Resolve the utterance text as an entity reference through Nexus. An
	// ambiguous match must stop and clarify — never guess a mutation target.
	entityID, displayName, ambiguous, err := h.ecosystem.resolveEntityReference(ctx, dec.Slots.Text, nil)
	if err != nil {
		// A genuine Nexus dependency failure, not "no such entity" — stop here
		// and report degradation rather than silently falling through to the
		// local command executor (ECOSYSTEM-SPEC.md: services degrade
		// independently, never a silent all-clear).
		return "экосистема недоступна, попробуй ещё раз."
	}
	if len(ambiguous) > 0 {
		return "уточни, что именно: " + strings.Join(ambiguous, ", ") + "?"
	}
	if entityID == "" {
		return ""
	}

	// Discover Hexis capabilities for this entity. A resolved entity with a
	// genuine Hexis failure must not be treated as "no capabilities" and
	// fall through to unrelated local execution.
	caps, err := h.ecosystem.discoverCapabilities(ctx, entityID)
	if err != nil {
		return "экосистема недоступна, попробуй ещё раз."
	}
	if len(caps) == 0 {
		return ""
	}

	// Match the user's verb to a capability by name/description. Collect all
	// matches: more than one is itself ambiguous, so we ask rather than pick
	// the first (ecosystem invariant: no arbitrary target for mutation).
	verb := dec.Slots.Fn
	if verb == "" {
		verb = dec.Slots.Text
	}
	verbLower := strings.ToLower(verb)

	var matches []*hexisclient.Capability
	for i, c := range caps {
		if strings.Contains(strings.ToLower(c.Name), verbLower) ||
			(c.Description != "" && strings.Contains(strings.ToLower(c.Description), verbLower)) {
			matches = append(matches, &caps[i])
		}
	}
	if len(matches) == 0 {
		return ""
	}
	if len(matches) > 1 {
		var names []string
		for _, m := range matches {
			names = append(names, m.Name)
		}
		return "какую команду для " + displayName + ": " + strings.Join(names, ", ") + "?"
	}
	matched := matches[0]

	// Read-only capabilities run immediately; mutating ones are parked for an
	// explicit spoken confirm bound to this capability + target.
	if !matched.ReadOnly {
		h.mu.Lock()
		h.pendingHexis = &pendingHexisExec{
			capabilityID: matched.ID,
			capName:      matched.Name,
			entityID:     entityID,
			displayName:  displayName,
			expiry:       h.now().Add(confirmTTL),
		}
		h.mu.Unlock()
		return "выполнить «" + matched.Name + "» для " + displayName + "? скажи «да» или «нет»."
	}

	return h.execHexis(ctx, matched.ID, matched.Name, entityID, displayName)
}

// execHexis runs a resolved capability and records a cross-service trace with
// the correlation ID. It reports command success, never operational recovery
// (Praxis observes recovery independently).
func (h *reactiveHandler) execHexis(ctx context.Context, capID, capName, entityID, displayName string) string {
	correlationID, err := h.ecosystem.executeCapability(ctx, capID, entityID, nil)
	if err != nil {
		log.Printf("ecosystem: hexis execute error (cor=%s): %v", correlationID, err)
		return "не получилось выполнить команду для " + displayName + "."
	}
	h.recordPraxisTrace(ctx, "hexis:"+capName, map[string]any{
		"entity_id":      entityID,
		"entity_name":    displayName,
		"capability":     capName,
		"correlation_id": correlationID,
	})
	return "команда выполнена для " + displayName + "."
}

// jsonString — a one-line JSON string encoder without dragging encoding/json
// into the top of this file. Used to wrap a reminder payload's text field;
// the router's reminder Slots are already absolute (DateTimeParser resolved
// relative→absolute), the payload shape is conventional {"text":...}.
func jsonString(s string) string {
	return jsonStringImpl(s)
}

// park stores a destructive act awaiting confirmation. Overwrites any prior
// pending (last-asked wins — single-user box).
func (h *reactiveHandler) park(fn string, args []string, phrase string) {
	h.mu.Lock()
	h.pending = &pendingAct{fn: fn, args: args, phrase: phrase, expiry: h.now().Add(confirmTTL)}
	h.mu.Unlock()
}

// resolveConfirm interprets an utterance as the answer to a parked destructive
// act OR a parked routine proposal. Returns (reply, true) when it consumed the
// utterance as a y/n answer; ("", false) when there's nothing pending (or the
// parked act expired), so the caller routes the utterance normally. An
// unrecognised answer cancels the pending and routes normally — a confirm that
// can't be answered clearly is safer abandoned than left armed.
func (h *reactiveHandler) resolveConfirm(ctx context.Context, text string) (string, bool) {
	h.mu.Lock()
	defer h.mu.Unlock()

	// Check routine proposal first (newer feature; checked before tool confirm
	// so a routine confirm doesn't get eaten by a stale tool pending).
	pr := h.pendingRoutine
	if pr != nil && !h.now().After(pr.expiry) {
		switch classifyConfirm(text) {
		case confirmYes:
			h.pendingRoutine = nil
			// Create a recurring reminder at the detected interval.
			// Weekly patterns get a cron expression; arbitrary intervals
			// fire once and the detector re-proposes on the next cycle.
			intervalDur := time.Duration(pr.interval * 24 * float64(time.Hour))
			fire := h.now().Add(intervalDur)
			cron := ""
			if pr.interval >= 6.5 && pr.interval <= 7.5 {
				cron = fmt.Sprintf("0 %d * * %d", fire.Hour(), int(fire.Weekday()))
			}
			payload := fmt.Sprintf(`{"text":"%s %s"}`, pr.action, pr.object)
			remID, err := h.api.CreateReminder(ctx, fire, payload, cron)
			if err != nil {
				log.Printf("voice: create routine reminder: %v", err)
				return "не получилось поставить напоминание.", true
			}
			if err := h.dataStore.AcceptProposedRoutine(ctx, pr.routineID, remID); err != nil {
				log.Printf("voice: accept proposed routine: %v", err)
			}
			return "буду напоминать.", true
		case confirmNo:
			h.pendingRoutine = nil
			if err := h.dataStore.DismissProposedRoutine(ctx, pr.routineID); err != nil {
				log.Printf("voice: dismiss proposed routine: %v", err)
			}
			return "хорошо, не буду.", true
		default:
			// unclear: abandon the routine proposal, route normally.
			h.pendingRoutine = nil
			return "", false
		}
	}
	// Clear expired routine if it existed.
	if pr != nil {
		h.pendingRoutine = nil
	}

	// Check pending Hexis execution confirm. Bound to the exact capability +
	// target that was proposed; a stray "да" can only run that, nothing else.
	if hx := h.pendingHexis; hx != nil {
		if h.now().After(hx.expiry) {
			h.pendingHexis = nil
		} else {
			switch classifyConfirm(text) {
			case confirmYes:
				h.pendingHexis = nil
				return h.execHexis(ctx, hx.capabilityID, hx.capName, hx.entityID, hx.displayName), true
			case confirmNo:
				h.pendingHexis = nil
				return "отменила.", true
			default:
				h.pendingHexis = nil
				return "", false
			}
		}
	}

	// Check tool confirm (existing behavior).
	p := h.pending
	if p == nil {
		return "", false
	}
	if h.now().After(p.expiry) {
		h.pending = nil
		return "", false
	}
	switch classifyConfirm(text) {
	case confirmYes:
		h.pending = nil
		out, err := h.tools.Exec(ctx, p.fn, p.args, true) // confirmed
		if err != nil {
			log.Printf("voice: tool %s (confirmed): %v", p.fn, err)
			if out != "" {
				return "не получилось выполнить команду: " + firstLine(out), true
			}
			return "не получилось выполнить команду.", true
		}
		if out != "" {
			return "готово: " + firstLine(out), true
		}
		return "готово.", true
	case confirmNo:
		h.pending = nil
		return "отменила.", true
	default:
		// unclear answer: abandon the confirm, route this utterance normally.
		h.pending = nil
		return "", false
	}
}

// proposeGap scaffolds a 'proposed' tool for an act whose verb isn't enabled.
// maven drafts the registration (name = the verb, provenance = the utterance);
// a human enables it on the authed surface. She suggests, never enables.
func (h *reactiveHandler) proposeGap(ctx context.Context, dec router.Decision) string {
	name := firstWord(stripWake(dec.Utterance))
	if name == "" {
		return "не разобрала команду — попробуй иначе."
	}
	newly, err := h.api.ProposeTool(ctx, name, dec.Utterance, "", h.now())
	if err != nil {
		log.Printf("voice: propose tool %q: %v", name, err)
		return "команды «" + name + "» нет в списке разрешённых."
	}
	if newly {
		return "команды «" + name + "» нет в списке. Предложила её добавить — включи через клиент."
	}
	return "команды «" + name + "» пока нет в списке — она уже предложена, включи через клиент."
}

// confirmVerdict — the parse of a y/n confirm answer.
type confirmVerdict int

const (
	confirmUnknown confirmVerdict = iota
	confirmYes
	confirmNo
)

// classifyConfirm reads a short ru/en yes-or-no answer. Substring match on the
// stems so inflections/fillers ("да, давай", "нет, отмени") still land.
func classifyConfirm(text string) confirmVerdict {
	t := strings.ToLower(strings.TrimSpace(text))
	// negatives first — "не надо" contains no "да", but check no-stems before
	// yes so a leading "нет" isn't shadowed.
	for _, no := range []string{"нет", "не надо", "отмен", "стоп", "no", "cancel", "stop", "don't"} {
		if strings.Contains(t, no) {
			return confirmNo
		}
	}
	for _, yes := range []string{"да", "ага", "давай", "подтвер", "конечно", "yes", "yeah", "yep", "confirm", "ок", "okay", "ok"} {
		if strings.Contains(t, yes) {
			return confirmYes
		}
	}
	return confirmUnknown
}

// actPhrase renders "fn arg1 arg2" for the confirm prompt.
func actPhrase(fn string, args []string) string {
	if len(args) == 0 {
		return fn
	}
	return fn + " " + strings.Join(args, " ")
}

// stripWake removes a leading wake token (any script the STT phonetically
// transcribes "Maven" as) so the verb is the first word.
func stripWake(u string) string {
	stripped, had := router.StripWakeToken(u)
	if !had {
		return strings.TrimSpace(u)
	}
	return stripped
}

// firstWord returns the first whitespace-delimited token (lowercased) — the
// proposed tool's name.
func firstWord(s string) string {
	f := strings.Fields(s)
	if len(f) == 0 {
		return ""
	}
	return strings.ToLower(f[0])
}

// seedTools upserts the config-declared tools into the store as enabled. Editing
// mavend.json is a human act, so a config tool is enabled by definition; this
// makes the declarative config the reproducible bootstrap while the store stays
// the single runtime source of truth (mavweb enables ad-hoc ones on top).
func seedTools(api ipc.CoreAPI, tools []config.ToolConfig) {
	ctx := context.Background()
	now := time.Now()
	n := 0
	for _, tc := range tools {
		if tc.Name == "" || len(tc.Cmd) == 0 {
			log.Printf("voice: skipping malformed tool config %+v", tc)
			continue
		}
		if err := api.EnableTool(ctx, tc.Name, tc.Cmd, tc.Destructive, tc.Scope, now); err != nil {
			log.Printf("voice: seed tool %q: %v", tc.Name, err)
			continue
		}
		n++
	}
	log.Printf("voice: seeded %d act tools from config", n)
}

// firstLine — the first non-empty line of a tool's output, for a short spoken
// reply (the full output goes to the log, not the TTS). Trimmed to keep the
// utterance sane if a command dumps a wall of text.
func firstLine(s string) string {
	for _, line := range strings.Split(s, "\n") {
		line = strings.TrimSpace(line)
		if line != "" {
			if len(line) > 200 {
				line = line[:200]
			}
			return line
		}
	}
	return ""
}

// isWeatherQuery returns true if the utterance is about weather.
func isWeatherQuery(u string) bool {
	lower := strings.ToLower(u)
	return strings.Contains(lower, "погод") ||
		strings.Contains(lower, "градус") ||
		strings.Contains(lower, "температур") ||
		strings.Contains(lower, "дожд") ||
		strings.Contains(lower, "холод") ||
		strings.Contains(lower, "тепл") ||
		strings.Contains(lower, "weather") ||
		strings.Contains(lower, "temperature")
}

// extractWeatherLocation parses a location from the utterance, or falls back
// to the configured default. Very basic: just checks for known city names.
func extractWeatherLocation(u, defaultLoc string) string {
	lower := strings.ToLower(u)
	cities := map[string]string{
		"москв":    "Moscow",
		"moscow":   "Moscow",
		"питер":    "Saint Petersburg",
		"spb":      "Saint Petersburg",
		"петербур": "Saint Petersburg",
		"лондон":   "London",
		"london":   "London",
		"париж":    "Paris",
		"paris":    "Paris",
		"берлин":   "Berlin",
		"berlin":   "Berlin",
		"нью-йорк": "New York",
		"new york": "New York",
	}
	for substr, name := range cities {
		if strings.Contains(lower, substr) {
			return name
		}
	}
	if defaultLoc != "" {
		return defaultLoc
	}
	return "Moscow"
}

// formatTime returns a human-readable Russian time string for a fact timestamp.
// Used by the query handler when answering "когда я это сделал?"-style questions.
func formatTime(t time.Time) string {
	now := time.Now()
	if t.After(now.Add(-2*time.Minute)) && t.Before(now.Add(2*time.Minute)) {
		return "только что"
	}
	diff := now.Sub(t)
	switch {
	case diff < 10*time.Minute:
		return "несколько минут назад"
	case diff < 60*time.Minute:
		return fmt.Sprintf("%d минут назад", int(diff.Minutes()))
	case diff < 2*time.Hour:
		return "час назад"
	case diff < 24*time.Hour:
		return fmt.Sprintf("%d часа назад", int(diff.Hours()))
	default:
		return t.Format("2 января 15:04")
	}
}

func jsonStringImpl(s string) string {
	// minimal JSON string escape — quotes + backslash + control chars.
	// adequate for the reminder payload's text field; not a general JSON
	// encoder. The chroma / RAG modules (when they land) use a real json
	// encoder for richer payloads. Keep it inline here so the import
	// direction stays narrow.
	var b []byte
	b = append(b, '"')
	for _, r := range s {
		switch r {
		case '"':
			b = append(b, '\\', '"')
		case '\\':
			b = append(b, '\\', '\\')
		case '\n':
			b = append(b, '\\', 'n')
		case '\r':
			b = append(b, '\\', 'r')
		case '\t':
			b = append(b, '\\', 't')
		default:
			if r < 0x20 {
				b = append(b, []byte(fmt.Sprintf("\\u%04x", r))...)
			} else {
				b = append(b, []byte(string(r))...)
			}
		}
	}
	b = append(b, '"')
	return string(b)
}