Add the morning routine engine — a daily checklist, not four timers

Backlog item #3 (20-07-2026-BACKLOG.md). A morning routine is a checklist for
a daily window: several items, each evidenced by a fact key, completed in any
order, checked once near the end of the window. Modelling it as four
independent reminder timers would stack into exactly the kind of noise Maven is
supposed not to produce, so the engine nags at most once per day per routine
and only for what is actually still missing.

internal/morning follows the established pure-engine pattern (loop, routine,
pattern): no store, no clock of its own. Evaluate answers "what's still
missing" at any point; Due decides whether to nag. The impurity — reading
facts under the store lock, holding the last-nudge map across ticks — stays in
the tick driver, which calls Due each tick exactly as it does for loop.Rule
and routine.Routine.

Completion evidence is a fact key's latest non-voided value timestamped inside
today's window, so manual ("выпил воды", voice-tapped) and inferred (another
daemon writing the same key) are indistinguishable and both count. Weekdays
scopes which days a routine applies to, so weekday/weekend variants are two
routine rows rather than a special case in the engine.

Exposed read-only: a MorningStatus RPC over ipc, and a /morning page in mavweb
built on the same server-rendered shape as /trace — no live-update loop, since
checklist state moves on the scale of minutes.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01X5JApcrCRVGmqrxnhynSik

internal/auth/auth_test.go

@@ -391,6 +391,9 @@ func (r *recordingAPI) ListReminders(_ context.Context, _ int) ([]ipc.Reminder,
 func (r *recordingAPI) TickTrace(_ context.Context) (ipc.TickTrace, error) {
 	return ipc.TickTrace{}, nil
 }
+func (r *recordingAPI) MorningStatus(_ context.Context) ([]ipc.MorningRoutineStatus, error) {
+	return nil, nil
+}
 func (r *recordingAPI) RecordNudge(_ context.Context, _, _, _ string, _ time.Time) (int64, error) {
 	return 1, nil
 }

internal/config/config.go

@@ -22,6 +22,7 @@ import (
 
 	"github.com/kami/maven/internal/delivery/ntfysink"
 	"github.com/kami/maven/internal/delivery/telegramsink"
+	"github.com/kami/maven/internal/morning"
 	"github.com/robfig/cron/v3"
 )
 
@@ -134,6 +135,11 @@ type Config struct {
 	// distinction from reminders (user-stated) and care rules (world-state).
 	Routines []RoutineConfig `json:"routines,omitempty"`
 
+	// MorningRoutines — daily checklists (medicine, water, pets, ...) checked
+	// once near the end of a time window instead of firing one reminder per
+	// item. See internal/morning for the evaluation engine. Empty ⇒ disabled.
+	MorningRoutines []MorningRoutineConfig `json:"morning_routines,omitempty"`
+
 	// Praxis — the ecosystem attention-state service. When configured, maven
 	// calls the Praxis HTTP tools API for attention listing and item lifecycle.
 	// Maven never touches Praxis's database directly (ecosystem invariant: no
@@ -181,6 +187,28 @@ type RoutineConfig struct {
 	Severity int    `json:"severity,omitempty"`
 }
 
+// MorningRoutineConfig — one daily checklist. WindowStart/WindowEnd/NudgeAt
+// are "HH:MM" local time; NudgeAt empty defaults to WindowEnd. Weekdays are
+// 0=Sunday..6=Saturday; empty means every day (set two routines under
+// different names for weekday/weekend variants).
+type MorningRoutineConfig struct {
+	Name        string                     `json:"name"`
+	Weekdays    []int                      `json:"weekdays,omitempty"`
+	WindowStart string                     `json:"window_start"`
+	WindowEnd   string                     `json:"window_end"`
+	NudgeAt     string                     `json:"nudge_at,omitempty"`
+	Severity    int                        `json:"severity,omitempty"`
+	Items       []MorningRoutineItemConfig `json:"items"`
+}
+
+// MorningRoutineItemConfig — one checklist entry. FactKey is the fact whose
+// presence within the window counts as completion evidence.
+type MorningRoutineItemConfig struct {
+	Key     string `json:"key"`
+	FactKey string `json:"fact_key"`
+	Label   string `json:"label"`
+}
+
 // QuietHoursConfig — a recurring daily quiet-window. Times are local to the
 // server's wall clock. A window crossing midnight (Start > End) is handled:
 // "23:00"-"08:00" means quiet from 23:00 to 08:00 the next day.
@@ -456,6 +484,13 @@ func (c *Config) applyDefaults() {
 			c.Routines[i].Severity = 1
 		}
 	}
+
+	// morning routines: same safe-floor default as cron routines.
+	for i := range c.MorningRoutines {
+		if c.MorningRoutines[i].Severity == 0 {
+			c.MorningRoutines[i].Severity = 1
+		}
+	}
 }
 
 func (c *Config) validate() error {
@@ -488,9 +523,46 @@ func (c *Config) validate() error {
 			return fmt.Errorf("routine %q: bad cron %q: %w", r.Name, r.Cron, err)
 		}
 	}
+	if len(c.MorningRoutines) > 0 {
+		if err := morning.Validate(morningRoutinesFromConfig(c.MorningRoutines)); err != nil {
+			return err
+		}
+	}
 	return nil
 }
 
+// morningRoutinesFromConfig maps the config's morning-routine blocks to the
+// engine type. Shared with the daemon so config validation and daemon wiring
+// can never drift on the mapping.
+func morningRoutinesFromConfig(mc []MorningRoutineConfig) []morning.Routine {
+	out := make([]morning.Routine, len(mc))
+	for i, r := range mc {
+		items := make([]morning.Item, len(r.Items))
+		for j, it := range r.Items {
+			items[j] = morning.Item{Key: it.Key, FactKey: it.FactKey, Label: it.Label}
+		}
+		weekdays := make([]time.Weekday, len(r.Weekdays))
+		for j, w := range r.Weekdays {
+			weekdays[j] = time.Weekday(w)
+		}
+		out[i] = morning.Routine{
+			Name:        r.Name,
+			Weekdays:    weekdays,
+			WindowStart: r.WindowStart,
+			WindowEnd:   r.WindowEnd,
+			NudgeAt:     r.NudgeAt,
+			Severity:    r.Severity,
+			Items:       items,
+		}
+	}
+	return out
+}
+
+// MorningRoutinesFromConfig is the exported form daemon wiring uses.
+func MorningRoutinesFromConfig(mc []MorningRoutineConfig) []morning.Routine {
+	return morningRoutinesFromConfig(mc)
+}
+
 // DBEncryptionKey resolves the at-rest encryption key: DBKeyEnv (if set) wins
 // over DBKeyB64. Returns (nil, nil) when neither is set — the caller then opens
 // a plaintext store. A configured-but-invalid key is an error (fail closed,

internal/ipc/api.go

@@ -292,6 +292,13 @@ type CoreAPI interface {
 	// persisted — it's a daemon-level cache).
 	TickTrace(ctx context.Context) (TickTrace, error)
 
+	// MorningStatus returns each configured morning routine's current
+	// checklist state (see internal/morning): active today/now, which items
+	// are done, which are still missing. The store adapter returns an error
+	// (morning routines are daemon-config, not persisted) — same shape as
+	// TickTrace.
+	MorningStatus(ctx context.Context) ([]MorningRoutineStatus, error)
+
 	// Chat routes a text utterance through the reactive handler's core path
 	// (router → dialogue → action → replier) and returns the reply text.
 	// No audio or stt/tts — for text channels (mavweb, telegram).
@@ -329,6 +336,22 @@ type TickTrace struct {
 	Rules  []RuleTrace `json:"rules"`
 }
 
+// MorningRoutineItem — one checklist entry's current state.
+type MorningRoutineItem struct {
+	Key   string `json:"key"`
+	Label string `json:"label"`
+	Done  bool   `json:"done"`
+}
+
+// MorningRoutineStatus — one routine's checklist state right now.
+type MorningRoutineStatus struct {
+	Name        string               `json:"name"`
+	Active      bool                 `json:"active"`
+	WindowStart string               `json:"window_start"`
+	WindowEnd   string               `json:"window_end"`
+	Items       []MorningRoutineItem `json:"items"`
+}
+
 // storeEncryptionKeyReq — passkey credential public key for wrapping the store
 // encryption key at enrollment time. Called by mavweb after RegisterFinish.
 type storeEncryptionKeyReq struct {

internal/ipc/client.go

@@ -70,6 +70,7 @@ var readOnlyMethods = map[Method]bool{
 	MethodListTools:            true,
 	MethodListProposedRoutines: true,
 	MethodTickTrace:            true,
+	MethodMorningStatus:        true,
 }
 
 // Dial connects to a core socket at path and returns a Client. The module
@@ -445,6 +446,14 @@ func (c *Client) TickTrace(ctx context.Context) (TickTrace, error) {
 	return t, nil
 }
 
+func (c *Client) MorningStatus(ctx context.Context) ([]MorningRoutineStatus, error) {
+	var s []MorningRoutineStatus
+	if err := c.call(ctx, MethodMorningStatus, nil, &s); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
 func (c *Client) RevertFact(ctx context.Context, key string) (int64, error) {
 	var result struct {
 		NewID int64 `json:"new_id"`

internal/ipc/ipc_test.go

@@ -493,6 +493,9 @@ func (a *chatTestAPI) RevertFact(ctx context.Context, key string) (int64, error)
 func (a *chatTestAPI) TickTrace(ctx context.Context) (TickTrace, error) {
 	return TickTrace{}, ErrUnknownMethod
 }
+func (a *chatTestAPI) MorningStatus(ctx context.Context) ([]MorningRoutineStatus, error) {
+	return nil, ErrUnknownMethod
+}
 func (a *chatTestAPI) Chat(ctx context.Context, text string) (string, error) {
 	if text == "привет" {
 		return "и тебе привет!", nil

internal/ipc/server.go

@@ -207,6 +207,10 @@ func (a *storeAPI) TickTrace(ctx context.Context) (TickTrace, error) {
 	return TickTrace{}, errors.New("store: tick trace not available via direct store API")
 }
 
+func (a *storeAPI) MorningStatus(ctx context.Context) ([]MorningRoutineStatus, error) {
+	return nil, errors.New("store: morning status not available via direct store API")
+}
+
 func (a *storeAPI) ListTools(ctx context.Context, status string) ([]Tool, error) {
 	ts, err := a.s.ListTools(ctx, status)
 	if err != nil {
@@ -801,6 +805,13 @@ func (s *Server) dispatch(ctx context.Context, req Request) (json.RawMessage, er
 		}
 		return marshalResult(t), nil
 
+	case MethodMorningStatus:
+		s, err := api.MorningStatus(ctx)
+		if err != nil {
+			return nil, err
+		}
+		return marshalResult(s), nil
+
 	case MethodAssertStepUp:
 		if s.StepUp != nil {
 			return marshalResult(nil), s.StepUp(ctx)

internal/ipc/wire.go

@@ -43,6 +43,7 @@ const (
 	MethodDismissProposedRoutine Method = "dismiss_proposed_routine"
 	MethodRevertFact             Method = "revert_fact"
 	MethodTickTrace          Method = "tick_trace"
+	MethodMorningStatus      Method = "morning_status"
 	MethodChat               Method = "chat"
 )
 

internal/morning/morning.go

@@ -0,0 +1,233 @@
+// Package morning is maven's morning routine engine — item #3 off the
+// 2026-07-20 backlog (see Maven/20-07-2026-BACKLOG.md).
+//
+// A Routine is NOT four independent reminder timers. It's a checklist for a
+// daily window: several Items, each evidenced by a fact key, completed in
+// any order, checked once near the end of the window. Maven should be able
+// to answer "what's still missing" at any point (Evaluate), and should nag
+// AT MOST once per day per routine when something got skipped (Due) — never
+// fire four separate item timers that stack into noise.
+//
+// This package is pure, like internal/loop and internal/routine: no store,
+// no clock of its own. The daemon's tick driver owns the impurity (reads
+// facts under the store lock, holds the last-nudge map across ticks) and
+// calls Due each tick, exactly as it does for loop.Rule and routine.Routine.
+package morning
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/kami/maven/internal/store"
+)
+
+// Item — one checklist entry. FactKey is the fact whose latest non-voided
+// value, if timestamped within today's window, counts as completion
+// evidence — manual (voice-tapped "выпил воды") and inferred (another
+// daemon writing the same key) are indistinguishable and both count, per
+// the backlog's "manual and inferred completion evidence" requirement.
+type Item struct {
+	Key     string
+	FactKey string
+	Label   string // RU text surfaced when this item is still missing.
+}
+
+// Routine — one daily checklist. WindowStart/WindowEnd are "HH:MM" local
+// time and must not cross midnight (a morning routine doesn't span days).
+// NudgeAt is when the engine checks for stragglers and nags once if
+// anything's missing; empty defaults to WindowEnd (nag right as the window
+// closes, not the moment it opens). Weekdays scopes which days this routine
+// applies to — empty means every day; set it twice under different names
+// for weekday/weekend variants.
+type Routine struct {
+	Name        string
+	Weekdays    []time.Weekday
+	WindowStart string
+	WindowEnd   string
+	NudgeAt     string
+	Severity    int
+	Items       []Item
+}
+
+// Status — the checklist's state right now. Active is false when the
+// routine doesn't apply today (weekday) or `now` falls outside its window;
+// Missing/Completed are meaningless in that case.
+type Status struct {
+	RoutineName string
+	Active      bool
+	Missing     []Item
+	Completed   []Item
+}
+
+// Candidate — a routine that's due for its one-per-day nag: the window has
+// reached NudgeAt and at least one item is still unevidenced.
+type Candidate struct {
+	Routine Routine
+	Missing []Item
+}
+
+// Validate reports the first structural problem with a routine set: missing
+// name/items, an unparseable HH:MM, an inverted window, a duplicate item key
+// within a routine, or an out-of-range weekday. Called at config load so a
+// typo surfaces at startup, not as a silently-broken checklist at runtime.
+func Validate(routines []Routine) error {
+	for _, r := range routines {
+		if r.Name == "" {
+			return fmt.Errorf("morning: name is required")
+		}
+		if len(r.Items) == 0 {
+			return fmt.Errorf("morning routine %q: at least one item is required", r.Name)
+		}
+		startH, startM, ok := parseHHMM(r.WindowStart)
+		if !ok {
+			return fmt.Errorf("morning routine %q: bad window_start %q", r.Name, r.WindowStart)
+		}
+		endH, endM, ok := parseHHMM(r.WindowEnd)
+		if !ok {
+			return fmt.Errorf("morning routine %q: bad window_end %q", r.Name, r.WindowEnd)
+		}
+		if startH*60+startM >= endH*60+endM {
+			return fmt.Errorf("morning routine %q: window_start must be before window_end", r.Name)
+		}
+		if r.NudgeAt != "" {
+			if _, _, ok := parseHHMM(r.NudgeAt); !ok {
+				return fmt.Errorf("morning routine %q: bad nudge_at %q", r.Name, r.NudgeAt)
+			}
+		}
+		for _, w := range r.Weekdays {
+			if w < time.Sunday || w > time.Saturday {
+				return fmt.Errorf("morning routine %q: bad weekday %d", r.Name, w)
+			}
+		}
+		seen := make(map[string]bool, len(r.Items))
+		for _, it := range r.Items {
+			if it.Key == "" {
+				return fmt.Errorf("morning routine %q: item key is required", r.Name)
+			}
+			if it.FactKey == "" {
+				return fmt.Errorf("morning routine %q item %q: fact_key is required", r.Name, it.Key)
+			}
+			if seen[it.Key] {
+				return fmt.Errorf("morning routine %q: duplicate item key %q", r.Name, it.Key)
+			}
+			seen[it.Key] = true
+		}
+	}
+	return nil
+}
+
+// Evaluate reports the routine's current checklist state, pure over the
+// given facts snapshot and clock reading. Callable any time — the "what's
+// still missing" query path — not just at nudge time.
+func Evaluate(r Routine, facts map[string]store.Fact, now time.Time) Status {
+	st := Status{RoutineName: r.Name}
+	if !appliesToday(r, now) {
+		return st
+	}
+	start, ok1 := todayAt(r.WindowStart, now)
+	end, ok2 := todayAt(r.WindowEnd, now)
+	if !ok1 || !ok2 || now.Before(start) || !now.Before(end) {
+		return st
+	}
+	st.Active = true
+	for _, it := range r.Items {
+		if evidenced(it, facts, start, now) {
+			st.Completed = append(st.Completed, it)
+		} else {
+			st.Missing = append(st.Missing, it)
+		}
+	}
+	return st
+}
+
+// Due returns the routines that have reached their nudge time today with at
+// least one item still missing, and records `now` in `last` for each one
+// returned so it fires at most once per calendar day. The caller owns
+// `last` (the tick driver holds it across ticks, mirroring routine.Due).
+func Due(routines []Routine, facts map[string]store.Fact, last map[string]time.Time, now time.Time) []Candidate {
+	var out []Candidate
+	for _, r := range routines {
+		if !appliesToday(r, now) {
+			continue
+		}
+		start, ok := todayAt(r.WindowStart, now)
+		if !ok {
+			continue
+		}
+		nudgeAtStr := r.NudgeAt
+		if nudgeAtStr == "" {
+			nudgeAtStr = r.WindowEnd
+		}
+		nudgeAt, ok := todayAt(nudgeAtStr, now)
+		if !ok || now.Before(nudgeAt) {
+			continue
+		}
+		var missing []Item
+		for _, it := range r.Items {
+			if !evidenced(it, facts, start, now) {
+				missing = append(missing, it)
+			}
+		}
+		if len(missing) == 0 {
+			continue
+		}
+		if prev, seen := last[r.Name]; seen && sameDay(prev, now) {
+			continue
+		}
+		last[r.Name] = now
+		out = append(out, Candidate{Routine: r, Missing: missing})
+	}
+	return out
+}
+
+// evidenced reports whether item has a non-voided fact timestamped within
+// [windowStart, now] — evidence from before the window opened (e.g.
+// yesterday's dose) doesn't count; evidence from the future can't exist.
+func evidenced(it Item, facts map[string]store.Fact, windowStart, now time.Time) bool {
+	f, ok := facts[it.FactKey]
+	if !ok || f.Ts.IsZero() {
+		return false
+	}
+	return !f.Ts.Before(windowStart) && !f.Ts.After(now)
+}
+
+func appliesToday(r Routine, now time.Time) bool {
+	if len(r.Weekdays) == 0 {
+		return true
+	}
+	for _, w := range r.Weekdays {
+		if w == now.Weekday() {
+			return true
+		}
+	}
+	return false
+}
+
+// todayAt resolves an "HH:MM" clock reading against now's calendar date and
+// location.
+func todayAt(hhmm string, now time.Time) (time.Time, bool) {
+	h, m, ok := parseHHMM(hhmm)
+	if !ok {
+		return time.Time{}, false
+	}
+	y, mo, d := now.Date()
+	return time.Date(y, mo, d, h, m, 0, 0, now.Location()), true
+}
+
+func sameDay(a, b time.Time) bool {
+	ay, am, ad := a.Date()
+	by, bm, bd := b.Date()
+	return ay == by && am == bm && ad == bd
+}
+
+func parseHHMM(s string) (hour, min int, ok bool) {
+	if len(s) != 5 || s[2] != ':' {
+		return 0, 0, false
+	}
+	h := int(s[0]-'0')*10 + int(s[1]-'0')
+	m := int(s[3]-'0')*10 + int(s[4]-'0')
+	if h < 0 || h > 23 || m < 0 || m > 59 {
+		return 0, 0, false
+	}
+	return h, m, true
+}

internal/morning/morning_test.go

@@ -0,0 +1,184 @@
+package morning
+
+import (
+	"testing"
+	"time"
+
+	"github.com/kami/maven/internal/store"
+)
+
+func mkRoutine() Routine {
+	return Routine{
+		Name:        "weekday_morning",
+		Weekdays:    []time.Weekday{time.Monday, time.Tuesday, time.Wednesday, time.Thursday, time.Friday},
+		WindowStart: "08:00",
+		WindowEnd:   "11:00",
+		Items: []Item{
+			{Key: "medicine", FactKey: "medicine", Label: "лекарство"},
+			{Key: "water", FactKey: "water", Label: "вода"},
+			{Key: "pets", FactKey: "pets", Label: "кот"},
+		},
+	}
+}
+
+func at(h, m int) time.Time {
+	return time.Date(2026, 7, 20, h, m, 0, 0, time.UTC) // 2026-07-20 is a Monday
+}
+
+func fact(ts time.Time) store.Fact { return store.Fact{Ts: ts} }
+
+func TestValidate(t *testing.T) {
+	r := mkRoutine()
+	if err := Validate([]Routine{r}); err != nil {
+		t.Fatalf("valid routine rejected: %v", err)
+	}
+
+	bad := r
+	bad.Items = nil
+	if err := Validate([]Routine{bad}); err == nil {
+		t.Fatal("expected error for no items")
+	}
+
+	bad = r
+	bad.WindowStart = "25:00"
+	if err := Validate([]Routine{bad}); err == nil {
+		t.Fatal("expected error for bad window_start")
+	}
+
+	bad = r
+	bad.WindowStart, bad.WindowEnd = "11:00", "08:00"
+	if err := Validate([]Routine{bad}); err == nil {
+		t.Fatal("expected error for inverted window")
+	}
+
+	bad = r
+	bad.Items = append(bad.Items, Item{Key: "medicine", FactKey: "x"})
+	if err := Validate([]Routine{bad}); err == nil {
+		t.Fatal("expected error for duplicate item key")
+	}
+}
+
+func TestEvaluateInactiveOutsideWindow(t *testing.T) {
+	r := mkRoutine()
+	st := Evaluate(r, nil, at(7, 59))
+	if st.Active {
+		t.Fatal("expected inactive before window opens")
+	}
+	st = Evaluate(r, nil, at(11, 0))
+	if st.Active {
+		t.Fatal("expected inactive at/after window closes")
+	}
+}
+
+func TestEvaluateInactiveOnWrongWeekday(t *testing.T) {
+	r := mkRoutine() // weekdays only
+	saturday := time.Date(2026, 7, 25, 9, 0, 0, 0, time.UTC)
+	if Evaluate(r, nil, saturday).Active {
+		t.Fatal("expected inactive on a weekend day not in Weekdays")
+	}
+}
+
+func TestEvaluateMissingAndCompleted(t *testing.T) {
+	r := mkRoutine()
+	facts := map[string]store.Fact{
+		"medicine": fact(at(8, 30)),
+	}
+	st := Evaluate(r, facts, at(9, 0))
+	if !st.Active {
+		t.Fatal("expected active within window")
+	}
+	if len(st.Completed) != 1 || st.Completed[0].Key != "medicine" {
+		t.Fatalf("expected medicine completed, got %+v", st.Completed)
+	}
+	if len(st.Missing) != 2 {
+		t.Fatalf("expected 2 missing, got %+v", st.Missing)
+	}
+}
+
+func TestEvaluateEvidenceBeforeWindowDoesNotCount(t *testing.T) {
+	r := mkRoutine()
+	facts := map[string]store.Fact{
+		"medicine": fact(at(7, 0)), // before window opened today
+	}
+	st := Evaluate(r, facts, at(9, 0))
+	for _, it := range st.Completed {
+		if it.Key == "medicine" {
+			t.Fatal("stale (pre-window) evidence should not count as completion")
+		}
+	}
+}
+
+func TestDueFiresOnlyAtNudgeTimeWithMissingItems(t *testing.T) {
+	r := mkRoutine() // NudgeAt empty -> defaults to WindowEnd (11:00)
+	facts := map[string]store.Fact{
+		"medicine": fact(at(8, 30)),
+		"water":    fact(at(8, 40)),
+		// pets missing
+	}
+	last := map[string]time.Time{}
+
+	if out := Due([]Routine{r}, facts, last, at(9, 0)); len(out) != 0 {
+		t.Fatalf("expected no candidate before nudge time, got %+v", out)
+	}
+
+	out := Due([]Routine{r}, facts, last, at(11, 0))
+	if len(out) != 1 {
+		t.Fatalf("expected 1 candidate at nudge time, got %d", len(out))
+	}
+	if len(out[0].Missing) != 1 || out[0].Missing[0].Key != "pets" {
+		t.Fatalf("expected only pets missing, got %+v", out[0].Missing)
+	}
+}
+
+func TestDueDoesNotRepeatSameDay(t *testing.T) {
+	r := mkRoutine()
+	facts := map[string]store.Fact{} // nothing done
+	last := map[string]time.Time{}
+
+	if out := Due([]Routine{r}, facts, last, at(11, 0)); len(out) != 1 {
+		t.Fatalf("expected first nudge to fire, got %d", len(out))
+	}
+	if out := Due([]Routine{r}, facts, last, at(11, 30)); len(out) != 0 {
+		t.Fatalf("expected no repeat nudge same day, got %d", len(out))
+	}
+}
+
+func TestDueFiresAgainNextDay(t *testing.T) {
+	r := mkRoutine()
+	facts := map[string]store.Fact{}
+	last := map[string]time.Time{}
+
+	Due([]Routine{r}, facts, last, at(11, 0))
+
+	tomorrow := time.Date(2026, 7, 21, 11, 0, 0, 0, time.UTC) // Tuesday
+	if out := Due([]Routine{r}, facts, last, tomorrow); len(out) != 1 {
+		t.Fatalf("expected nudge to fire again on a new day, got %d", len(out))
+	}
+}
+
+func TestDueSkipsWhenAllItemsComplete(t *testing.T) {
+	r := mkRoutine()
+	facts := map[string]store.Fact{
+		"medicine": fact(at(8, 30)),
+		"water":    fact(at(8, 40)),
+		"pets":     fact(at(8, 50)),
+	}
+	last := map[string]time.Time{}
+	if out := Due([]Routine{r}, facts, last, at(11, 0)); len(out) != 0 {
+		t.Fatalf("expected no nudge when all items complete, got %+v", out)
+	}
+}
+
+func TestDueRespectsExplicitNudgeAt(t *testing.T) {
+	r := mkRoutine()
+	r.NudgeAt = "10:00"
+	facts := map[string]store.Fact{}
+	last := map[string]time.Time{}
+
+	if out := Due([]Routine{r}, facts, last, at(9, 30)); len(out) != 0 {
+		t.Fatalf("expected no candidate before explicit nudge_at, got %+v", out)
+	}
+	if out := Due([]Routine{r}, facts, last, at(10, 0)); len(out) != 1 {
+		t.Fatalf("expected candidate at explicit nudge_at, got %d", len(out))
+	}
+}