Run pattern detection from the digestion tick, not just voice (#43)

detectPattern only ever fired as a side effect of a voice fact-write, so a
recurring pattern already sitting in history went unnoticed until he
happened to mention it again by voice — the opposite of proactive.

Split the pipeline: extraction (fact -> normalized event) stays where a fact
is written, in voice.go, since it's tied to that write regardless of who's
talking. Detection (events -> stable pattern -> proposed_routines row) moves
into shared code (patterns.go's detectAndPropose) that both the voice path
and the new tick.go:detectPatterns call. The tick runs it every cycle over
every action+object pair on record (store.DistinctEventPairs, added), so a
pattern gets noticed on the daemon's own schedule.

Idempotence and the dismiss-must-stick requirement turned out to already be
handled by the store, not something the tick needs to reinvent:
proposed_routines has UNIQUE(action, object) and CreateProposedRoutine does
ON CONFLICT DO NOTHING, and DismissProposedRoutine flips status in place
without deleting the row. So a pair already proposed, accepted, OR
dismissed is a silent no-op on every later tick — a dismissed pattern can
never resurface, and re-running the scan never spams the /routines page.
Kept the voice-path call (immediate spoken confirmation is a nice feature
UX-wise and is now redundant-but-harmless with the tick, since both paths
share the same guarded detectAndPropose).

Tick-side detection only ever writes a row; it does not notify, ring, or
speak, keeping Maven "not a nag, not autonomous" — the /routines page is
still the only place a proposal becomes visible, and only accepting it
starts producing nudges (fireAcceptedRoutines).

Also fixed the stale vikunja#46 reference in proposed_routines.go — the
TODO it named is what this commit does.

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

cmd/mavend/patterns.go

@@ -0,0 +1,74 @@
+// mavend/patterns.go — the shared detect+propose step of pattern inference
+// (Vikunja #43). Event *extraction* (fact -> action/object) happens at fact-
+// write time in voice.go's detectPattern, tied to whichever channel wrote the
+// fact. Detection — turning a run of events into a proposed routine — is
+// channel-agnostic: it only needs what's already in the events table, so it
+// runs both right after a voice fact-write (for the immediate "напоминать?"
+// confirmation) and, proactively, from the digestion tick (tick.go's
+// detectPatterns) over every action+object pair on record, not just the one
+// that was just talked about.
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/kami/maven/internal/pattern"
+	"github.com/kami/maven/internal/store"
+)
+
+// detectAndPropose runs the pattern detector over every recorded event for
+// action+object and, if a stable pattern is found and nothing has been
+// proposed/accepted/dismissed for this pair yet, creates a proposed_routines
+// row. Returns (nil, 0, nil) — not an error — whenever there is nothing new
+// to report: too few events, irregular intervals, or a pair that already has
+// a row in any status. That last case is the one that matters most: it is
+// how a routine the owner already DISMISSED stays dismissed forever, because
+// the row survives dismissal (status flips in place, see
+// store.DismissProposedRoutine) and both the Lookup check here and the
+// table's UNIQUE(action, object) constraint refuse to create a second one.
+func detectAndPropose(ctx context.Context, ds *store.Store, action, object string, ts time.Time) (*pattern.ProposedRoutine, int64, error) {
+	events, err := ds.EventsFor(ctx, action, object)
+	if err != nil {
+		return nil, 0, fmt.Errorf("events for %s/%s: %w", action, object, err)
+	}
+	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 {
+		return nil, 0, fmt.Errorf("detect %s/%s: %w", action, object, err)
+	}
+	if r == nil {
+		return nil, 0, nil // not enough data or intervals too irregular
+	}
+
+	// Belt: check first so the common "nothing new" case never even attempts
+	// an insert. Suspenders: CreateProposedRoutine's ON CONFLICT DO NOTHING
+	// (backed by the UNIQUE(action,object) constraint) is the actual
+	// guarantee — this Lookup is an optimization, not the source of truth.
+	existing, err := ds.LookupProposedRoutine(ctx, r.Action, r.Object)
+	if err != nil {
+		return nil, 0, fmt.Errorf("lookup proposed routine %s/%s: %w", action, object, err)
+	}
+	if existing != nil {
+		return nil, 0, nil // already proposed, accepted, or dismissed — say nothing
+	}
+
+	id, err := ds.CreateProposedRoutine(ctx, r.Action, r.Object, r.IntervalDays, ts)
+	if err != nil {
+		if errors.Is(err, store.ErrProposedRoutineExists) {
+			return nil, 0, nil // lost a race with another caller — not an error
+		}
+		return nil, 0, fmt.Errorf("create proposed routine %s/%s: %w", action, object, err)
+	}
+	return r, id, nil
+}

cmd/mavend/patterns_test.go

@@ -0,0 +1,122 @@
+package main
+
+import (
+	"context"
+	"database/sql"
+	"testing"
+	"time"
+
+	"github.com/kami/maven/internal/store"
+)
+
+// seedRefillEvents writes N weekly "refill/cat_water" events straight to the
+// events table — this is what the tick reads, independent of any utterance.
+func seedRefillEvents(t *testing.T, st *store.Store, ctx context.Context, base time.Time, n int) {
+	t.Helper()
+	for i := 0; i < n; i++ {
+		factID, err := st.WriteFact(ctx, base.Add(time.Duration(i)*7*24*time.Hour), store.KindSelf,
+			"cat_water", "refill", "test", 1.0, sql.NullInt64{})
+		if err != nil {
+			t.Fatalf("write fact %d: %v", i, err)
+		}
+		if _, err := st.CreateEvent(ctx, factID, "refill", "cat_water", base.Add(time.Duration(i)*7*24*time.Hour)); err != nil {
+			t.Fatalf("create event %d: %v", i, err)
+		}
+	}
+}
+
+// TestTickDetectsPatternFromStoredEvents proves the tick notices a pattern on
+// its own, reading straight from the store — not as a side effect of a live
+// utterance (Vikunja #43). Three weekly events with no voice turn in sight
+// must produce exactly one proposed routine.
+func TestTickDetectsPatternFromStoredEvents(t *testing.T) {
+	st := newTestStore(t)
+	ctx := context.Background()
+	now := refNow()
+	seedRefillEvents(t, st, ctx, now, 3)
+
+	tl := newTestTickLoop(t, st, &fakeSink{}, nil)
+	tl.detectPatterns(ctx, now)
+
+	rows, err := st.ListProposedRoutines(ctx)
+	if err != nil {
+		t.Fatalf("list proposed routines: %v", err)
+	}
+	if len(rows) != 1 {
+		t.Fatalf("proposed routines = %d, want 1: %+v", len(rows), rows)
+	}
+	if rows[0].Action != "refill" || rows[0].Object != "cat_water" {
+		t.Errorf("proposed routine = %s/%s, want refill/cat_water", rows[0].Action, rows[0].Object)
+	}
+}
+
+// TestTickPatternDetectionIsIdempotent proves running the tick's pattern scan
+// twice does not spam a second proposal for the same pair, and that the store
+// itself is what stops the duplicate (not tick-local state) — the whole point
+// of the guard, since the tick has no memory of what it proposed last time.
+func TestTickPatternDetectionIsIdempotent(t *testing.T) {
+	st := newTestStore(t)
+	ctx := context.Background()
+	now := refNow()
+	seedRefillEvents(t, st, ctx, now, 3)
+
+	tl := newTestTickLoop(t, st, &fakeSink{}, nil)
+	tl.detectPatterns(ctx, now)
+	tl.detectPatterns(ctx, now.Add(time.Hour))
+
+	rows, err := st.ListProposedRoutines(ctx)
+	if err != nil {
+		t.Fatalf("list proposed routines: %v", err)
+	}
+	if len(rows) != 1 {
+		t.Fatalf("proposed routines after two ticks = %d, want 1 (no duplicate): %+v", len(rows), rows)
+	}
+}
+
+// TestTickPatternDetectionRespectsDismissal proves the single worst failure
+// mode here — a proposal the owner already said no to coming back on the next
+// tick — cannot happen. Dismissal flips the row's status in place; it must
+// still be there to block re-proposal.
+func TestTickPatternDetectionRespectsDismissal(t *testing.T) {
+	st := newTestStore(t)
+	ctx := context.Background()
+	now := refNow()
+	seedRefillEvents(t, st, ctx, now, 3)
+
+	tl := newTestTickLoop(t, st, &fakeSink{}, nil)
+	tl.detectPatterns(ctx, now)
+
+	rows, err := st.ListProposedRoutines(ctx)
+	if err != nil {
+		t.Fatalf("list proposed routines: %v", err)
+	}
+	if len(rows) != 1 {
+		t.Fatalf("setup: proposed routines = %d, want 1", len(rows))
+	}
+	if err := st.DismissProposedRoutine(ctx, rows[0].ID); err != nil {
+		t.Fatalf("dismiss: %v", err)
+	}
+
+	// More events for the same pair arrive, and the tick runs again — a
+	// dismissed pattern must not resurface.
+	seedRefillEvents(t, st, ctx, now.Add(30*24*time.Hour), 3)
+	tl.detectPatterns(ctx, now.Add(60*24*time.Hour))
+
+	proposed, err := st.ListProposedRoutinesByStatus(ctx, store.RoutineProposed)
+	if err != nil {
+		t.Fatalf("list proposed: %v", err)
+	}
+	if len(proposed) != 0 {
+		t.Fatalf("a dismissed pattern came back: %+v", proposed)
+	}
+	all, err := st.ListProposedRoutinesByStatus(ctx, "")
+	if err != nil {
+		t.Fatalf("list all: %v", err)
+	}
+	if len(all) != 1 {
+		t.Fatalf("total rows for the pair = %d, want 1 (still dismissed, not duplicated): %+v", len(all), all)
+	}
+	if all[0].Status != store.RoutineDismissed {
+		t.Errorf("status = %s, want dismissed", all[0].Status)
+	}
+}

cmd/mavend/tick.go

@@ -195,6 +195,14 @@ func (t *tickLoop) tick(ctx context.Context, now time.Time) {
 	// nudge time. See internal/morning for the "why not four timers" rationale.
 	t.fireMorningRoutines(ctx, now, state)
 
+	// pattern detection: scan every action+object pair with recorded events
+	// and propose a routine for any stable one not already decided (Vikunja
+	// #43). This used to only run as a side effect of the voice fact-write
+	// path, so a pattern already sitting in history went unnoticed until he
+	// happened to mention it again by voice. See patterns.go and
+	// detectPatterns below for how idempotence and dismissal are respected.
+	t.detectPatterns(ctx, now)
+
 	// reminders: gate-bypassing class. fired once, marked after a successful
 	// delivery.  a failed send leaves the reminder pending — the next tick
 	// re-gathers and re-attempts.
@@ -342,6 +350,49 @@ func (t *tickLoop) flushDigest(ctx context.Context, now time.Time, state loop.St
 	t.digestQ = nil
 }
 
+// detectPatterns runs the pattern detector proactively over every
+// action+object pair that has ever produced an event, independent of
+// whichever fact write (or channel) last touched it (Vikunja #43). This is
+// what makes pattern inference actually proactive: it fires on the daemon's
+// own schedule reading accumulated history, not only as a side effect of a
+// live voice turn.
+//
+// Idempotence and noise are handled by the store, not here — this function
+// is safe to call every tick:
+//   - Same pattern, tick after tick: detectAndPropose's LookupProposedRoutine
+//     check plus proposed_routines' UNIQUE(action, object) constraint (with
+//     CreateProposedRoutine's ON CONFLICT DO NOTHING) mean a pair that
+//     already has a row — in ANY status — produces no second row and no log
+//     spam beyond the one line at genuine creation.
+//   - A DISMISSED proposal must never come back. DismissProposedRoutine flips
+//     status in place; the row is never deleted. So the same Lookup check
+//     that stops a duplicate "proposed" also stops a "dismissed" one from
+//     resurrecting — there is nothing tick-specific to get right here beyond
+//     calling the same shared path the voice route already used.
+//
+// This only ever creates a row for the /routines page to show. It does not
+// notify, ring, or speak — Maven is "not a nag, not autonomous" (CLAUDE.md),
+// and detection is not the same act as disturbing him about it. A proposal
+// only starts producing nudges once he accepts it (fireAcceptedRoutines).
+func (t *tickLoop) detectPatterns(ctx context.Context, now time.Time) {
+	pairs, err := t.store.DistinctEventPairs(ctx)
+	if err != nil {
+		log.Printf("tick: distinct event pairs: %v", err)
+		return
+	}
+	for _, p := range pairs {
+		r, _, err := detectAndPropose(ctx, t.store, p.Action, p.Object, now)
+		if err != nil {
+			log.Printf("tick: detect pattern %s/%s: %v", p.Action, p.Object, err)
+			continue
+		}
+		if r == nil {
+			continue // no stable pattern, or already proposed/accepted/dismissed
+		}
+		log.Printf("tick: proposed routine: %s/%s every %.1f days", r.Action, r.Object, r.IntervalDays)
+	}
+}
+
 // routinesFromConfig maps the config's routine blocks to the engine type.
 // Validation (cron parses, name/body present, severity defaulted) already ran
 // in config.Load, so this is a pure field copy.

cmd/mavend/voice.go

@@ -874,42 +874,19 @@ func (h *reactiveHandler) detectPattern(ctx context.Context, factID int64, key,
 		log.Printf("voice: create event: %v", err)
 		return ""
 	}
-	events, err := h.dataStore.EventsFor(ctx, ev.Action, ev.Object)
+	// Detect+propose (Vikunja #43) is shared with the digestion tick's
+	// proactive scan — see patterns.go. Event *extraction* above stays here,
+	// tied to this fact write; detection over the accumulated history does
+	// not need to happen right now for the voice path to have already done
+	// its job — it's dedupe-safe to also let the next tick find the same
+	// pattern independently.
+	r, id, err := detectAndPropose(ctx, h.dataStore, ev.Action, ev.Object, ts)
 	if err != nil {
-		log.Printf("voice: events for %s/%s: %v", ev.Action, ev.Object, err)
+		log.Printf("voice: detect pattern %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
+		return "" // not enough data, too irregular, or already proposed/decided
-	}
-	// 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)
 

internal/store/events.go

@@ -35,6 +35,36 @@ func (s *Store) CreateEvent(ctx context.Context, factID int64, action, object st
 	return id, nil
 }
 
+// EventPair identifies one action+object grouping in the events table — the
+// unit the pattern detector reasons about.
+type EventPair struct {
+	Action string
+	Object string
+}
+
+// DistinctEventPairs returns every distinct action+object pair that has at
+// least one event, in no particular order. This is what lets the proactive
+// digestion tick run the pattern detector over everything accumulated so far
+// instead of only the pair touched by the utterance that just landed
+// (Vikunja #43) — the tick has no "current utterance," so it has to ask the
+// store what to look at.
+func (s *Store) DistinctEventPairs(ctx context.Context) ([]EventPair, error) {
+	rows, err := s.db.QueryContext(ctx, `SELECT DISTINCT action, object FROM events`)
+	if err != nil {
+		return nil, fmt.Errorf("distinct event pairs: %w", err)
+	}
+	defer rows.Close()
+	var out []EventPair
+	for rows.Next() {
+		var p EventPair
+		if err := rows.Scan(&p.Action, &p.Object); err != nil {
+			return nil, err
+		}
+		out = append(out, p)
+	}
+	return out, rows.Err()
+}
+
 // EventsFor returns all events matching action+object, ordered by ts ascending
 // (oldest first — the order the pattern detector needs for interval computation).
 func (s *Store) EventsFor(ctx context.Context, action, object string) ([]Event, error) {

internal/store/proposed_routines.go

@@ -51,9 +51,10 @@ var (
 // keep finding the pattern, and every re-propose is refused here. Maven is not
 // a nag.
 //
-// TODO(vikunja#46): the detector currently only writes here from the voice
+// Vikunja #43: this is called both from the voice fact-write path (for the
-// path. Once digestion runs the detector on its own tick, that tick should
+// immediate spoken confirmation) and from the digestion tick's proactive
-// call this too, so a pattern gets noticed even with nobody at the mic.
+// scan (cmd/mavend/tick.go's detectPatterns, via patterns.go's
+// detectAndPropose), so a pattern gets noticed even with nobody at the mic.
 func (s *Store) CreateProposedRoutine(ctx context.Context, action, object string, intervalDays float64, ts time.Time) (int64, error) {
 	res, err := s.db.ExecContext(ctx,
 		`INSERT INTO proposed_routines (action, object, interval_days, status, created_ts)