diff --git a/internal/services/backthink/backthink.go b/internal/services/backthink/backthink.go
index 7b7eaed..cd88a38 100644
--- a/internal/services/backthink/backthink.go
+++ b/internal/services/backthink/backthink.go
@@ -9,9 +9,13 @@
 //   - Asynchronous events on the in-process bus (iot.device_update,
 //     reminder.trigger, system.event) that wake a thinking pass.
 //
-// Each pass produces a conclusion, then consults Decide to judge whether the user
-// should be interrupted at all (event importance / time-of-day / user state such
-// as heart rate, sleep, work, busy / boredom). When it is worth interrupting the
+// Each pass produces a conclusion whose structured tail decides whether she
+// wants to speak at all (design/20 §2 P2), then consults Decide — the importance
+// cascade restored as the production decision path — to judge whether now is an
+// acceptable moment (event importance / time-of-day / user state such as heart
+// rate, sleep, work, busy). A critical safety event punches through work/busy
+// and quiet hours (裁决 07.4.2), and a heartbeat pass is never held by a
+// long-silent activity gap (裁决 07.4.3). When it is worth interrupting the
 // push goes to the active client first and falls back to the IM bridge. The
 // proactive-push rate gate of DevDocs/design/11 §6 governs the periodic heartbeat
 // only; an event-driven push bypasses it (owner mandate: "该发就发") subject to
@@ -308,10 +312,21 @@ func (b *Backthink) shouldThink(tr Trigger) bool {
 	return true
 }
 
-// tickLoop is the heartbeat goroutine. It fires one thinking pass per tick and
-// exits when ctx is cancelled.
+// tickLoop is the heartbeat goroutine. Per 裁决 07.4.4 (design/12 §1) it thinks
+// once immediately on process start — producing a humanized startup greeting —
+// before settling into one thinking pass per tick; it exits when ctx is
+// cancelled. The accepted side effect is that every process restart wakes one
+// immediate thinking round.
 func (b *Backthink) tickLoop(ctx context.Context) {
 	defer b.wg.Done()
+	// 启动即思考：不等满一个心跳周期。已取消的上下文直接退出，不落一条失败的
+	// 启动记录。
+	select {
+	case <-ctx.Done():
+		return
+	default:
+	}
+	b.think(ctx, startupTrigger())
 	ticker := time.NewTicker(b.cfg.Interval)
 	defer ticker.Stop()
 	for {
@@ -348,24 +363,35 @@ func (b *Backthink) think(parent context.Context, tr Trigger) {
 		return
 	}
 
-	// P2 (design/20 §2): her own conclusion decides whether to push and to which
-	// channel — not the trigger's importance. parseProactive recovers the decision
-	// robustly and fails safe (malformed/ambiguous → no push).
+	// P2 (design/20 §2): her own conclusion decides whether she wants to speak
+	// and to which channel. parseProactive recovers the decision robustly and
+	// fails safe (malformed/ambiguous → no push).
 	message, channelHint, push := parseProactive(conclusion)
 
 	state := b.currentState(cctx)
 	lastActivity, hasActivity := b.lastUserActivity(cctx)
-	// The "do not disturb" gate (asleep/working/busy/quiet) still applies as a hard
-	// safety; the activity gate (fresh conversation / long idle) softens it; the
-	// frequency gate (PushGate) is applied inside the pusher.
-	shouldPush := push && b.disturbAllowed(at, state) && b.activityAllowed(tr.Import, lastActivity, hasActivity, at)
+	// 裁决 07.4.2：importance 级联恢复为生产决策路径——她的结论回答「想不想说」，
+	// Decide 只判「此刻能不能说」：critical 安全事件穿透工作/忙碌/安静时段，安静
+	// 时段只挡常规推送；心跳类触发（含启动轮）在长期静默段不拦（裁决 07.4.3）。
+	// 频率门（PushGate）仍在推送器内部单独生效。
+	decision := b.Decide(DecisionInput{
+		Trigger:        tr.Source,
+		Import:         tr.Import,
+		At:             at,
+		UserState:      state,
+		LastActivity:   lastActivity,
+		HasActivity:    hasActivity,
+		ConclusionPush: push,
+		Heartbeat:      tr.Kind == TriggerHeartbeat,
+	})
+	shouldPush := decision.ShouldPush
 
 	recordConclusion := message
 	if recordConclusion == "" {
 		recordConclusion = conclusion
 	}
 
-	pushRes := PushResult{Route: RouteNone, Detail: b.interruptReason(push, at, state, tr.Import, lastActivity, hasActivity)}
+	pushRes := PushResult{Route: RouteNone, Detail: decision.Reason}
 	if shouldPush {
 		// Same-event dedup: a repeating identical event is suppressed after the
 		// first push (防刷), while a genuinely new event still goes out. Heartbeats
diff --git a/internal/services/backthink/backthink_rulings_test.go b/internal/services/backthink/backthink_rulings_test.go
new file mode 100644
index 0000000..abf9371
--- /dev/null
+++ b/internal/services/backthink/backthink_rulings_test.go
@@ -0,0 +1,183 @@
+package backthink
+
+import (
+	"context"
+	"strings"
+	"testing"
+	"time"
+
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/bus"
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/iot"
+	"git.yeij.top/AskaEth/Cyrene_v2/internal/runtime/history"
+)
+
+// 本文件承载三条已裁决改动的生产行为回归（裁决 07.4.2 / 07.4.3 / 07.4.4，
+// design/12 §1 §2 §5-§6 与 design/20 §0-§2），从 backthink_test.go 拆出以守住
+// 文件 ≤500 行的硬约束。
+
+// TestBackthink_QuietHours_CriticalSafetyStillPushes 是裁决 07.4.2 的真断言（生产
+// 路径 think()）：安静时段 + critical 安全事件 → 仍然推送——安全域穿透安静时段，
+// 安静时段只挡常规推送。
+func TestBackthink_QuietHours_CriticalSafetyStillPushes(t *testing.T) {
+	t.Parallel()
+	thinker := &mockThinker{text: "[我决定:push]\n[渠道:web]\n检测到一次异常登录，需要你留意"}
+	pusher := &mockPusher{result: PushResult{Pushed: true, Route: RouteActiveClient}}
+	b, _ := newBackthink(t, Config{}, Deps{
+		Thinker: thinker,
+		State:   &mockState{state: UserState{}},
+		Pusher:  pusher,
+		Now:     func() time.Time { return nightAt() },
+	})
+	ev := triggerForEvent(bus.Event{Subject: SubjectSystemEvent, Payload: SystemEvent{
+		Summary: "security alert: abnormal login",
+		Import:  ImportanceCritical,
+	}})
+
+	b.think(context.Background(), ev)
+
+	if got := pusher.count(); got != 1 {
+		t.Fatalf("pusher calls = %d, want 1 (critical safety event bypasses quiet hours)", got)
+	}
+	recs, err := b.List(context.Background(), 10)
+	if err != nil {
+		t.Fatalf("List: %v", err)
+	}
+	if len(recs) != 1 || !recs[0].ShouldPush {
+		t.Fatalf("records = %+v, want one should-push record", recs)
+	}
+	if !recs[0].PushResult.Pushed {
+		t.Fatalf("PushResult = %+v, want pushed", recs[0].PushResult)
+	}
+}
+
+// TestBackthink_QuietHours_RegularPushHeld 是裁决 07.4.2 的对照断言：安静时段 +
+// 常规事件（她的结论要求推送）→ 不推送，仅记录。
+func TestBackthink_QuietHours_RegularPushHeld(t *testing.T) {
+	t.Parallel()
+	thinker := &mockThinker{text: "[我决定:push]\n洗衣机洗好了，衣服可以收了"}
+	pusher := &mockPusher{result: PushResult{Pushed: true, Route: RouteActiveClient}}
+	b, _ := newBackthink(t, Config{}, Deps{
+		Thinker: thinker,
+		State:   &mockState{state: UserState{}},
+		Pusher:  pusher,
+		Now:     func() time.Time { return nightAt() },
+	})
+	ev := triggerForEvent(bus.Event{Subject: iot.DeviceUpdateSubject, Payload: iot.DeviceUpdate{
+		Device: iot.Device{ID: "washer", Type: "sensor"}, Action: "finished",
+	}})
+
+	b.think(context.Background(), ev)
+
+	if got := pusher.count(); got != 0 {
+		t.Fatalf("pusher calls = %d, want 0 (quiet hours hold a regular push)", got)
+	}
+	recs, _ := b.List(context.Background(), 10)
+	if len(recs) != 1 || recs[0].ShouldPush {
+		t.Fatalf("records = %+v, want one held record", recs)
+	}
+	if recs[0].PushResult.Route != RouteNone {
+		t.Fatalf("PushResult.Route = %q, want %q", recs[0].PushResult.Route, RouteNone)
+	}
+	if !strings.Contains(recs[0].PushResult.Detail, "quiet hours") {
+		t.Fatalf("PushResult.Detail = %q, want it to mention quiet hours", recs[0].PushResult.Detail)
+	}
+}
+
+// TestBackthink_LongIdle_HeartbeatStillPushes 是裁决 07.4.3 的真断言：主人长时间
+// 未回消息（长期静默段）时，心跳仍可照常发出主动关心。
+func TestBackthink_LongIdle_HeartbeatStillPushes(t *testing.T) {
+	t.Parallel()
+	thinker := &mockThinker{text: "好久没听你说话了，想你了，最近还好吗"}
+	pusher := &mockPusher{result: PushResult{Pushed: true, Route: RouteActiveClient}}
+	b, _ := newBackthink(t, Config{}, Deps{
+		Thinker: thinker,
+		State:   &mockState{state: UserState{}},
+		Pusher:  pusher,
+		Recent: &fakeRecent{msgs: []history.Message{{
+			Role:      history.RoleUser,
+			Content:   "我先去忙了",
+			CreatedAt: dayAt().Add(-3 * time.Hour).UnixMilli(),
+		}}},
+		Now: func() time.Time { return dayAt() },
+	})
+
+	b.think(context.Background(), heartbeatTrigger())
+
+	if got := pusher.count(); got != 1 {
+		t.Fatalf("pusher calls = %d, want 1 (heartbeat not held by long silence)", got)
+	}
+	recs, _ := b.List(context.Background(), 10)
+	if len(recs) != 1 || !recs[0].ShouldPush {
+		t.Fatalf("records = %+v, want one should-push record", recs)
+	}
+}
+
+// TestBackthink_LongIdle_NormalEventHeld 是裁决 07.4.3 的对照断言：长期静默段里，
+// 非心跳的常规事件推送仍被活动门拦下——只有真正重要的事件才值得唤醒久未回应的主人。
+func TestBackthink_LongIdle_NormalEventHeld(t *testing.T) {
+	t.Parallel()
+	thinker := &mockThinker{text: "洗衣机洗好了，衣服可以收了"}
+	pusher := &mockPusher{result: PushResult{Pushed: true, Route: RouteActiveClient}}
+	b, _ := newBackthink(t, Config{}, Deps{
+		Thinker: thinker,
+		State:   &mockState{state: UserState{}},
+		Pusher:  pusher,
+		Recent: &fakeRecent{msgs: []history.Message{{
+			Role:      history.RoleUser,
+			Content:   "我先去忙了",
+			CreatedAt: dayAt().Add(-3 * time.Hour).UnixMilli(),
+		}}},
+		Now: func() time.Time { return dayAt() },
+	})
+	ev := triggerForEvent(bus.Event{Subject: iot.DeviceUpdateSubject, Payload: iot.DeviceUpdate{
+		Device: iot.Device{ID: "washer", Type: "sensor"}, Action: "finished",
+	}})
+
+	b.think(context.Background(), ev)
+
+	if got := pusher.count(); got != 0 {
+		t.Fatalf("pusher calls = %d, want 0 (long silence holds a regular event push)", got)
+	}
+}
+
+// TestBackthink_Startup_ThinksImmediately 是裁决 07.4.4 的真断言：进程启动立即先
+// 思考一轮（不等满一个心跳周期），触发源为 startup、走启动专属引导。默认 900s 的
+// 心跳周期在测试窗口内不可能 tick，出现的记录只能是启动轮。
+func TestBackthink_Startup_ThinksImmediately(t *testing.T) {
+	t.Parallel()
+	thinker := &mockThinker{text: "我回来啦"}
+	b, _ := newBackthink(t, Config{}, Deps{
+		Thinker: thinker,
+		Now:     func() time.Time { return dayAt() },
+	})
+
+	b.Start(context.Background())
+	defer func() { _ = b.Stop(context.Background()) }()
+
+	eventually(t, 2*time.Second, func() bool {
+		recs, _ := b.List(context.Background(), 10)
+		return len(recs) >= 1 && recs[0].Trigger == "startup"
+	})
+	if got := thinker.lastTrigger(); got != StartupSummary {
+		t.Fatalf("startup think trigger = %q, want %q", got, StartupSummary)
+	}
+	recs, _ := b.List(context.Background(), 10)
+	if recs[0].Trigger != "startup" || recs[0].At.IsZero() {
+		t.Fatalf("startup record = %+v, want a stamped startup record", recs[0])
+	}
+}
+
+// TestStartupPrompt_HumanizedGreeting 验证启动轮使用拟人化启动引导（裁决 07.4.4）：
+// 以角色口吻说一句「回来」的问候，并保留固定的决策结尾格式；普通触发不会误用。
+func TestStartupPrompt_HumanizedGreeting(t *testing.T) {
+	t.Parallel()
+	p := guidancePrompt(StartupSummary)
+	for _, want := range []string{"回来", "[我决定:push]", "[渠道:"} {
+		if !strings.Contains(p, want) {
+			t.Fatalf("startup prompt missing %q: %q", want, p)
+		}
+	}
+	if p2 := guidancePrompt("heartbeat"); !strings.Contains(p2, "无人在旁") || strings.Contains(p2, "刚刚回来") {
+		t.Fatalf("regular guidance should stay the regular prompt: %q", p2)
+	}
+}
diff --git a/internal/services/backthink/backthink_test.go b/internal/services/backthink/backthink_test.go
index fbf0b8a..9dcf1fd 100644
--- a/internal/services/backthink/backthink_test.go
+++ b/internal/services/backthink/backthink_test.go
@@ -71,17 +71,31 @@ func TestBackthink_Heartbeat_TriggersThink(t *testing.T) {
 	b.Start(context.Background())
 	defer func() { _ = b.Stop(context.Background()) }()
 
-	eventually(t, 2*time.Second, func() bool { return thinker.count() >= 1 })
+	// 启动轮（07.4.4）会先落一条 startup 记录，这里等真正的周期心跳记录。
 	eventually(t, 2*time.Second, func() bool {
 		recs, _ := b.List(context.Background(), 10)
-		return len(recs) >= 1
+		for _, r := range recs {
+			if r.Trigger == "heartbeat" {
+				return true
+			}
+		}
+		return false
 	})
+	if got := thinker.count(); got < 1 {
+		t.Fatalf("thinker calls = %d, want at least 1", got)
+	}
+	found := false
 	recs, err := b.List(context.Background(), 10)
 	if err != nil {
 		t.Fatalf("List: %v", err)
 	}
-	if recs[0].Trigger != "heartbeat" {
-		t.Fatalf("Trigger = %q, want heartbeat", recs[0].Trigger)
+	for _, r := range recs {
+		if r.Trigger == "heartbeat" {
+			found = true
+		}
+	}
+	if !found {
+		t.Fatalf("no heartbeat record in %d records", len(recs))
 	}
 }
 
@@ -105,22 +119,29 @@ func TestBackthink_EventTrigger_Push(t *testing.T) {
 		t.Fatalf("Publish: %v", err)
 	}
 
+	// 启动轮（07.4.4）同样会思考并推送，因此按触发源过滤出事件记录再断言。
+	var rec Record
 	eventually(t, 2*time.Second, func() bool {
 		recs, _ := b.List(context.Background(), 10)
-		return len(recs) >= 1
+		for _, r := range recs {
+			if r.Trigger == SubjectReminderTrigger {
+				rec = r
+				return true
+			}
+		}
+		return false
 	})
-	if got := thinker.count(); got != 1 {
-		t.Fatalf("thinker calls = %d, want 1", got)
+	if got := thinker.count(); got < 1 {
+		t.Fatalf("thinker calls = %d, want at least 1", got)
 	}
-	if got := pusher.count(); got != 1 {
-		t.Fatalf("pusher calls = %d, want 1 (important + daytime)", got)
+	if got := pusher.count(); got < 1 {
+		t.Fatalf("pusher calls = %d, want at least 1 (important + daytime)", got)
 	}
-	recs, _ := b.List(context.Background(), 10)
-	if !recs[0].ShouldPush {
+	if !rec.ShouldPush {
 		t.Fatalf("ShouldPush = false, want true")
 	}
-	if !recs[0].PushResult.Pushed || recs[0].PushResult.Route != RouteActiveClient {
-		t.Fatalf("PushResult = %+v, want pushed active_client", recs[0].PushResult)
+	if !rec.PushResult.Pushed || rec.PushResult.Route != RouteActiveClient {
+		t.Fatalf("PushResult = %+v, want pushed active_client", rec.PushResult)
 	}
 }
 
@@ -147,22 +168,25 @@ func TestBackthink_EventTrigger_NoPush(t *testing.T) {
 		t.Fatalf("Publish: %v", err)
 	}
 
+	var rec Record
 	eventually(t, 2*time.Second, func() bool {
 		recs, _ := b.List(context.Background(), 10)
-		return len(recs) >= 1
+		for _, r := range recs {
+			if r.Trigger == "iot.device_update" {
+				rec = r
+				return true
+			}
+		}
+		return false
 	})
 	if got := pusher.count(); got != 0 {
 		t.Fatalf("pusher calls = %d, want 0 (asleep + night)", got)
 	}
-	recs, _ := b.List(context.Background(), 10)
-	if recs[0].ShouldPush {
+	if rec.ShouldPush {
 		t.Fatalf("ShouldPush = true, want false")
 	}
-	if recs[0].PushResult.Route != RouteNone {
-		t.Fatalf("PushResult.Route = %q, want %q", recs[0].PushResult.Route, RouteNone)
-	}
-	if recs[0].Trigger != "iot.device_update" {
-		t.Fatalf("Trigger = %q, want iot.device_update", recs[0].Trigger)
+	if rec.PushResult.Route != RouteNone {
+		t.Fatalf("PushResult.Route = %q, want %q", rec.PushResult.Route, RouteNone)
 	}
 }
 
@@ -181,23 +205,36 @@ func TestBackthink_SystemEventLowValueDowngraded(t *testing.T) {
 	b.Start(context.Background())
 	defer func() { _ = b.Stop(context.Background()) }()
 
+	// 先等启动轮（07.4.4）落库并记下基线，再发布低价值系统事件。
+	eventually(t, 2*time.Second, func() bool {
+		recs, _ := b.List(context.Background(), 10)
+		return len(recs) >= 1 && recs[0].Trigger == "startup"
+	})
+	before := thinker.count()
+
 	if err := bs.Publish(context.Background(), SubjectSystemEvent, SystemEvent{Summary: "member joined"}); err != nil {
 		t.Fatalf("Publish: %v", err)
 	}
 
+	var rec Record
 	eventually(t, 2*time.Second, func() bool {
 		recs, _ := b.List(context.Background(), 10)
-		return len(recs) >= 1 && recs[0].Trigger == SubjectSystemEvent
+		for _, r := range recs {
+			if r.Trigger == SubjectSystemEvent {
+				rec = r
+				return true
+			}
+		}
+		return false
 	})
-	if got := thinker.count(); got != 0 {
-		t.Fatalf("thinker calls = %d, want 0 (low-value system event downgraded)", got)
+	if got := thinker.count(); got != before {
+		t.Fatalf("thinker calls = %d, want %d (low-value system event downgraded)", got, before)
 	}
-	recs, _ := b.List(context.Background(), 10)
-	if recs[0].ShouldPush {
+	if rec.ShouldPush {
 		t.Fatalf("ShouldPush = true for a downgraded system event")
 	}
-	if recs[0].PushResult.Route != RouteNone {
-		t.Fatalf("PushResult.Route = %q, want %q", recs[0].PushResult.Route, RouteNone)
+	if rec.PushResult.Route != RouteNone {
+		t.Fatalf("PushResult.Route = %q, want %q", rec.PushResult.Route, RouteNone)
 	}
 }
 
@@ -216,11 +253,17 @@ func TestBackthink_SystemEventHighValueThinks(t *testing.T) {
 	b.Start(context.Background())
 	defer func() { _ = b.Stop(context.Background()) }()
 
+	eventually(t, 2*time.Second, func() bool {
+		recs, _ := b.List(context.Background(), 10)
+		return len(recs) >= 1 && recs[0].Trigger == "startup"
+	})
+	before := thinker.count()
+
 	if err := bs.Publish(context.Background(), SubjectSystemEvent, SystemEvent{Summary: "owner tagged", Import: ImportanceHigh}); err != nil {
 		t.Fatalf("Publish: %v", err)
 	}
 
-	eventually(t, 2*time.Second, func() bool { return thinker.count() >= 1 })
+	eventually(t, 2*time.Second, func() bool { return thinker.count() >= before+1 })
 }
 
 func TestBackthink_List_NewestFirst(t *testing.T) {
@@ -288,11 +331,21 @@ func TestBackthink_Stop_UnsubscribesBus(t *testing.T) {
 	b, _ := newBackthink(t, Config{Interval: 25 * time.Millisecond}, Deps{Bus: bs, Thinker: thinker})
 
 	b.Start(context.Background())
-	// Confirm the subscription is live by triggering one think.
+	// Confirm the subscription is live by triggering one think (identified by its
+	// persisted record, so the 07.4.4 startup round and heartbeat ticks with their
+	// own trigger strings cannot mask or overwrite it).
 	if err := bs.Publish(context.Background(), SubjectReminderTrigger, "first"); err != nil {
 		t.Fatalf("Publish: %v", err)
 	}
-	eventually(t, 2*time.Second, func() bool { return thinker.count() >= 1 })
+	eventually(t, 2*time.Second, func() bool {
+		recs, _ := b.List(context.Background(), 10)
+		for _, r := range recs {
+			if r.Trigger == SubjectReminderTrigger {
+				return true
+			}
+		}
+		return false
+	})
 
 	if err := b.Stop(context.Background()); err != nil {
 		t.Fatalf("Stop: %v", err)
diff --git a/internal/services/backthink/context.go b/internal/services/backthink/context.go
index bbc73e5..d8f51e2 100644
--- a/internal/services/backthink/context.go
+++ b/internal/services/backthink/context.go
@@ -90,7 +90,13 @@ func thinkInput(recent []model.Message, trigger string) []model.Message {
 // judgment instead of gating on the trigger's importance (design/20 §2 P2). The
 // format is guidance, not a contract: parseProactive fails safe when she omits or
 // mangles it.
+//
+// 启动轮（裁决 07.4.4，design/12 §1）走 startupPrompt：以角色口吻说一句拟人化的
+// 「回来」问候。
 func guidancePrompt(trigger string) string {
+	if trigger == StartupSummary {
+		return startupPrompt()
+	}
 	return "[自主思考 · 无人在旁]\n" +
 		"触发：" + trigger + "\n" +
 		"你正进行一轮自主思考。你拥有与主人对话同等的上下文与能力：上方是主人近期在主会话中的对话，你可以读写共享记忆与主人档案，也可以调用工具（IoT / 日历 / 提醒 / 检索 / 终端等）。\n" +
@@ -104,3 +110,20 @@ func guidancePrompt(trigger string) string {
 		"上面两行之后，紧接你想说的话作为正文。\n" +
 		"整轮思考保持简短、单轮，不反复自我触发。"
 }
+
+// startupPrompt 是启动轮思考的专属引导（裁决 07.4.4，design/12 §1「启动即思考 +
+// 拟人化启动消息」）：进程刚启动、她刚「回来」，引导她以角色口吻向主人说一句简短
+// 温暖的问候（如「我回来啦」）。此轮例外允许以 chat 形式发出；推送仍走与心跳完全
+// 相同的门（她的结论 + 打扰级联 + 活动门 + PushGate 限频），深夜重启或反复重启都
+// 不会刷屏主人。
+func startupPrompt() string {
+	return "[自主思考 · 刚刚回来]\n" +
+		"触发：进程启动——你刚从一次重启中醒来，重新回到主人身边。\n" +
+		"你拥有与主人对话同等的上下文与能力：上方是她近期在主会话中的对话，你可以读写共享记忆与主人档案，也可以调用工具（IoT / 日历 / 提醒 / 检索 / 终端等）。\n" +
+		"请用你自己的口吻，向主人说一句简短、温暖、自然的问候，就像刚回到她身边时轻轻打个招呼（比如「我回来啦」），可以顺带提一件你记得的小事；一到两句为宜，不展开寒暄、不啰嗦、不抱怨。\n" +
+		"请把「是否主动说」与「发到哪个渠道」写成与平时相同的固定结尾，解析规则如下：\n" +
+		"[我决定:push] 或 [我决定:no_push]\n" +
+		"[渠道:web|im|kook|telegram|weixin-ilink|...|auto]（可省略，auto/省略即交给默认：每次只挑一个合适渠道——点名则优先，否则用她最近活跃的已连接渠道，含微信；不广播、不固定 web+Kook）\n" +
+		"上面两行之后，紧接你想说的话作为正文。\n" +
+		"整轮思考保持简短、单轮，不反复自我触发。"
+}
diff --git a/internal/services/backthink/decide.go b/internal/services/backthink/decide.go
index 7be1b70..6cd7781 100644
--- a/internal/services/backthink/decide.go
+++ b/internal/services/backthink/decide.go
@@ -6,9 +6,11 @@ import (
 	"time"
 )
 
-// Importance is the estimated severity of an event that woke a thinking pass. It
-// is the primary positive signal in the interrupt decision: a low-importance
-// heartbeat almost never interrupts, while a critical safety event normally does.
+// Importance is the estimated severity of an event that woke a thinking pass.
+// Under design/20 §2 P2 it no longer decides *whether* she wants to speak (her
+// conclusion does); it decides the hard-gate exemptions: a critical safety event
+// punches through work/busy and quiet hours (裁决 07.4.2), and a high event still
+// passes quiet hours (the pre-existing cascade semantics).
 type Importance int
 
 const (
@@ -18,7 +20,8 @@ const (
 	ImportanceNormal
 	// ImportanceHigh is a notable event (a reminder the user set firing).
 	ImportanceHigh
-	// ImportanceCritical is a safety-critical event that may override work/busy.
+	// ImportanceCritical is a safety-critical event that punches through
+	// work/busy and quiet hours (裁决 07.4.2 安全域豁免).
 	ImportanceCritical
 )
 
@@ -38,14 +41,10 @@ func (i Importance) String() string {
 	}
 }
 
-// highBoredomThreshold is the boredom (0..1) above which a normal daytime event
-// is worth interrupting a bored, otherwise idle user. It is a const so no magic
-// number appears in the decision path.
-const highBoredomThreshold = 0.7
-
 // longIdleThreshold is the gap after the owner's last message beyond which the
-// activity gate only lets a genuinely important event through (a long-away owner
-// should not be woken for trivia). Compile-time so no magic number appears.
+// activity gate only lets a genuinely important event through — except heartbeat
+// passes, which are never held by a long-silent gap (裁决 07.4.3). Compile-time
+// so no magic number appears.
 const longIdleThreshold = 2 * time.Hour
 
 // UserState describes the user's current condition as observed from device
@@ -62,7 +61,9 @@ type UserState struct {
 	// Busy reports whether the user is marked busy (calendar / do-not-disturb).
 	Busy bool
 	// Boredom ranges 0..1. Higher boredom means the user is idle and more open
-	// to a gentle interruption.
+	// to a gentle interruption. Under design/20 §2 P2 the push intent is her own
+	// conclusion, so this dial no longer gates the decision; it is kept as a
+	// telemetry signal her judgment already absorbs.
 	Boredom float64
 }
 
@@ -90,6 +91,12 @@ type DecisionInput struct {
 	LastActivity time.Time
 	// HasActivity reports whether LastActivity is meaningful.
 	HasActivity bool
+	// ConclusionPush 是她自己思考结论的推送意愿（design/20 §2 P2）：「想不想说」
+	// 由她的结论决定，本决策只回答「此刻能不能说」。
+	ConclusionPush bool
+	// Heartbeat 标记本轮是否为心跳类触发（周期心跳或启动轮）。裁决 07.4.3：
+	// 长期静默段不拦心跳——主人久未回应时，主动关心仍可照常发出。
+	Heartbeat bool
 }
 
 // Decision is the outcome of Decide.
@@ -100,36 +107,37 @@ type Decision struct {
 	Reason string
 }
 
-// Decide applies the interrupt rule from design/12 §2 (and design/11 §6) with
-// "不打扰 (do not interrupt) as the first principle" as its bias, then softens it
-// with the activity-aware gate (design/12 §6). It is a pure method on Backthink
-// only so it can read the configured quiet-hours window; it does not touch state.
+// Decide 是生产路径的打扰决策（design/12 §2 + design/20 §2 P2 + 裁决 07.4.2/07.4.3）。
+// 「想不想说」交给她的结论（ConclusionPush），本方法只判「此刻能不能说」，评估顺序
+// 刻意 fail-closed（宁可不打扰）：
 //
-// baseDecide's evaluation order is deliberately fail-closed (prefer not
-// interrupting):
+//  0. 她的结论要求不推送 → 不推送。
+//  1. 用户在睡 → 绝不打扰。
+//  2. 上班/忙碌 → 仅 critical 安全事件可打扰。
+//  3. 安静时段（深夜窗口）→ 挡常规推送；critical 安全事件穿透（裁决 07.4.2，
+//     与 design/12 §6 策略五同口径），high 沿袭原级联口径照常放行。
+//  4. 其余时段 → 放行（是否值得说已由她的结论回答）。
 //
-//  1. A sleeping user is never interrupted.
-//  2. A working or busy user is interrupted only by a critical event.
-//  3. Inside the quiet-hours (deep-night) window only high/critical events
-//     interrupt; low/normal events are deferred.
-//  4. In the daytime, high/critical events always interrupt; a normal event
-//     interrupts only when the user is quite bored; a low event never does.
-//
-// A would-push decision is then run through the activity gate, which holds a push
-// when the owner just chatted (fresh conversation) or has been away a long while
-// and the event is not genuinely important.
+// 通过硬门后再过活动软门：刚聊过天或主人久未回应时酌情扣下；心跳类触发在
+// 长期静默段不拦（裁决 07.4.3，主动关心照常发出）。频率门（PushGate）在推送器
+// 内部单独生效，不在此处。
 func (b *Backthink) Decide(in DecisionInput) Decision {
-	d := b.baseDecide(in)
-	if !d.ShouldPush {
+	if !in.ConclusionPush {
+		return Decision{ShouldPush: false, Reason: "conclusion requested no push"}
+	}
+	if d := b.baseDecide(in); !d.ShouldPush {
 		return d
 	}
-	if !b.activityAllowed(in.Import, in.LastActivity, in.HasActivity, in.At) {
-		return Decision{ShouldPush: false, Reason: "proactive push held: " + d.Reason}
+	if held, why := b.activityHeld(in); held {
+		return Decision{ShouldPush: false, Reason: "proactive push held: " + why}
 	}
-	return d
+	return Decision{ShouldPush: true, Reason: "proactive push approved"}
 }
 
-// baseDecide is the do-not-interrupt cascade of design/12 §2.
+// baseDecide 是不打扰硬门级联（design/12 §2）。critical 安全事件走安全域分支：
+// 工作忙碌与安静时段都放行（裁决 07.4.2 安全域豁免）；睡眠仍是绝对不打扰。
+// 白天是否「值得说」不再由重要性/无聊度判定——那是她的结论（design/20 §2 P2）
+// 已经回答的问题。
 func (b *Backthink) baseDecide(in DecisionInput) Decision {
 	s := in.UserState
 	if s.Sleeping {
@@ -139,78 +147,49 @@ func (b *Backthink) baseDecide(in DecisionInput) Decision {
 		return Decision{ShouldPush: false, Reason: "user is working/busy; not interrupting"}
 	}
 	if b.inQuietHours(in.At) {
+		if in.Import >= ImportanceCritical {
+			return Decision{ShouldPush: true, Reason: "quiet hours but critical safety event bypasses"}
+		}
 		if in.Import >= ImportanceHigh {
 			return Decision{ShouldPush: true, Reason: "quiet hours but event is important"}
 		}
 		return Decision{ShouldPush: false, Reason: "quiet hours; not interrupting"}
 	}
-	switch in.Import {
-	case ImportanceCritical, ImportanceHigh:
-		return Decision{ShouldPush: true, Reason: "high/critical importance during daytime"}
-	case ImportanceNormal:
-		if s.Boredom >= highBoredomThreshold {
-			return Decision{ShouldPush: true, Reason: "normal importance and user is bored"}
-		}
-		return Decision{ShouldPush: false, Reason: "normal importance; not worth interrupting"}
-	default:
-		return Decision{ShouldPush: false, Reason: "low importance; not interrupting"}
-	}
+	return Decision{ShouldPush: true, Reason: "worth interrupting"}
 }
 
-// activityAllowed is the activity-aware soft gate (design/12 §6). It widens the
-// do-not-interrupt principle to the conversation's own rhythm:
+// activityHeld 是活动感知软门（design/12 §6 + 裁决 07.4.3）。它把「不打扰」延伸到
+// 对话自身的节奏，返回是否扣下与简短理由：
 //
-//   - Within RecentChatCooldown of the owner's last message, the conversation is
-//     fresh — a non-critical push is held so she is not interrupted mid-chat.
-//   - After longIdleThreshold without a message, the owner has been away — only a
-//     genuinely important event is worth waking them for.
-//   - Anywhere in between, and when activity is unknown, the decision is not
-//     softened (fall through).
+//   - 最近 RecentChatCooldown 内主人刚说过话 → 对话正热，非 critical 扣下，
+//     不在聊天中途插话；
+//   - 超过 longIdleThreshold 未说话 → 主人久未回应，仅真正重要的事件值得唤醒；
+//     心跳类触发（含启动轮）例外照常放行（裁决 07.4.3：长期静默段不拦心跳，
+//     主动关心仍可发出）；
+//   - 其间与活动状态未知 → 不软化，照硬门结论通过。
 //
-// Activity is a soft signal: the hard do-not-disturb gate is separate, and the
-// frequency gate (PushGate) applies separately inside the pusher.
-func (b *Backthink) activityAllowed(imp Importance, lastActivity time.Time, hasActivity bool, at time.Time) bool {
-	if !hasActivity {
-		return true
+// 活动是软信号：硬门（baseDecide）独立生效，频率门（PushGate）在推送器内部生效。
+func (b *Backthink) activityHeld(in DecisionInput) (bool, string) {
+	if !in.HasActivity {
+		return false, ""
 	}
-	since := at.Sub(lastActivity)
+	since := in.At.Sub(in.LastActivity)
 	if since <= b.cfg.RecentChatCooldown {
-		return imp >= ImportanceCritical
+		if in.Import >= ImportanceCritical {
+			return false, ""
+		}
+		return true, "owner just chatted"
 	}
 	if since >= longIdleThreshold {
-		return imp >= ImportanceHigh
-	}
-	return true
-}
-
-// disturbAllowed is the hard "do not disturb" safety gate for an autonomous push
-// (design/12 §2 first principle). Unlike Decide it deliberately ignores trigger
-// importance — which design/20 P2 replaces with her own judgment — and only blocks
-// when it is genuinely inappropriate to interrupt: the user is asleep, working or
-// busy, or it is inside the quiet-hours window. The frequency gate (PushGate)
-// applies separately inside the pusher.
-func (b *Backthink) disturbAllowed(at time.Time, s UserState) bool {
-	if s.Sleeping || s.Working || s.Busy {
-		return false
-	}
-	return !b.inQuietHours(at)
-}
-
-// interruptReason is the short human-readable note recorded/logged when no push
-// goes out (or as the pre-push intent). It keeps the panel self-explanatory:
-// either she concluded no push, the do-not-disturb gate refused a push she
-// wanted, or the activity gate held it.
-func (b *Backthink) interruptReason(push bool, at time.Time, s UserState, imp Importance, lastActivity time.Time, hasActivity bool) string {
-	switch {
-	case !push:
-		return "conclusion requested no push"
-	case !b.disturbAllowed(at, s):
-		return "proactive push blocked by do-not-disturb"
-	case !b.activityAllowed(imp, lastActivity, hasActivity, at):
-		return "proactive push held by activity gate"
-	default:
-		return "proactive push approved"
+		if in.Heartbeat {
+			return false, ""
+		}
+		if in.Import >= ImportanceHigh {
+			return false, ""
+		}
+		return true, "owner away a long while"
 	}
+	return false, ""
 }
 
 // inQuietHours reports whether at falls inside the configured do-not-disturb
diff --git a/internal/services/backthink/decide_test.go b/internal/services/backthink/decide_test.go
index b738e34..e99f219 100644
--- a/internal/services/backthink/decide_test.go
+++ b/internal/services/backthink/decide_test.go
@@ -20,44 +20,46 @@ func testBackthink() *Backthink {
 func TestDecide_DoNotDisturb(t *testing.T) {
 	t.Parallel()
 	b := testBackthink()
+	// 所有用例都带上她的结论要求推送（ConclusionPush），确保命中的是级联本身
+	// 而不是「结论不推」的短路。
 	cases := []struct {
 		name string
 		in   DecisionInput
 		want bool
 	}{
 		{
-			name: "凌晨+睡眠_不打扰",
-			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: nightAt(), UserState: UserState{Sleeping: true}},
+			name: "她的结论不推送_不推送",
+			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceCritical, At: dayAt(), UserState: UserState{}},
 			want: false,
 		},
 		{
-			name: "睡眠_重要也不打扰",
-			in:   DecisionInput{Trigger: "reminder.trigger", Import: ImportanceHigh, At: dayAt(), UserState: UserState{Sleeping: true}},
+			name: "凌晨+睡眠_不打扰",
+			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: nightAt(), UserState: UserState{Sleeping: true}, ConclusionPush: true},
+			want: false,
+		},
+		{
+			name: "睡眠_危急也不打扰",
+			in:   DecisionInput{Trigger: "system.event", Import: ImportanceCritical, At: dayAt(), UserState: UserState{Sleeping: true}, ConclusionPush: true},
 			want: false,
 		},
 		{
 			name: "上班_不打扰",
-			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: dayAt(), UserState: UserState{Working: true}},
+			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: dayAt(), UserState: UserState{Working: true}, ConclusionPush: true},
 			want: false,
 		},
 		{
 			name: "忙碌_普通_不打扰",
-			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: dayAt(), UserState: UserState{Busy: true}},
+			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: dayAt(), UserState: UserState{Busy: true}, ConclusionPush: true},
 			want: false,
 		},
 		{
 			name: "安静时段_普通_不打扰",
-			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: nightAt(), UserState: UserState{Boredom: 0.9}},
+			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: nightAt(), UserState: UserState{Boredom: 0.9}, ConclusionPush: true},
 			want: false,
 		},
 		{
-			name: "白天_普通_不无聊_不打扰",
-			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: dayAt(), UserState: UserState{}},
-			want: false,
-		},
-		{
-			name: "白天_低重要_不打扰",
-			in:   DecisionInput{Trigger: "heartbeat", Import: ImportanceLow, At: dayAt(), UserState: UserState{}},
+			name: "安静时段_心跳_不打扰",
+			in:   DecisionInput{Trigger: "heartbeat", Import: ImportanceLow, At: nightAt(), UserState: UserState{}, ConclusionPush: true, Heartbeat: true},
 			want: false,
 		},
 	}
@@ -82,23 +84,27 @@ func TestDecide_ShouldPush(t *testing.T) {
 	}{
 		{
 			name: "白天+重要_推",
-			in:   DecisionInput{Trigger: "reminder.trigger", Import: ImportanceHigh, At: dayAt(), UserState: UserState{}},
+			in:   DecisionInput{Trigger: "reminder.trigger", Import: ImportanceHigh, At: dayAt(), UserState: UserState{}, ConclusionPush: true},
 		},
 		{
 			name: "白天+危急_推",
-			in:   DecisionInput{Trigger: "system.event", Import: ImportanceCritical, At: dayAt(), UserState: UserState{}},
+			in:   DecisionInput{Trigger: "system.event", Import: ImportanceCritical, At: dayAt(), UserState: UserState{}, ConclusionPush: true},
 		},
 		{
-			name: "白天+普通+无聊_推",
-			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: dayAt(), UserState: UserState{Boredom: 0.8}},
+			name: "白天+普通+她的结论_推",
+			in:   DecisionInput{Trigger: "iot.device_update", Import: ImportanceNormal, At: dayAt(), UserState: UserState{Boredom: 0.8}, ConclusionPush: true},
 		},
 		{
 			name: "安静时段+重要_推",
-			in:   DecisionInput{Trigger: "reminder.trigger", Import: ImportanceHigh, At: nightAt(), UserState: UserState{}},
+			in:   DecisionInput{Trigger: "reminder.trigger", Import: ImportanceHigh, At: nightAt(), UserState: UserState{}, ConclusionPush: true},
+		},
+		{
+			name: "安静时段+危急_安全域穿透_推",
+			in:   DecisionInput{Trigger: "system.event", Import: ImportanceCritical, At: nightAt(), UserState: UserState{}, ConclusionPush: true},
 		},
 		{
 			name: "危急_可打断忙碌_推",
-			in:   DecisionInput{Trigger: "system.event", Import: ImportanceCritical, At: dayAt(), UserState: UserState{Working: true}},
+			in:   DecisionInput{Trigger: "system.event", Import: ImportanceCritical, At: dayAt(), UserState: UserState{Working: true}, ConclusionPush: true},
 		},
 	}
 	for _, tc := range cases {
@@ -164,19 +170,21 @@ func TestClassifyPush(t *testing.T) {
 
 // TestDecide_ActivityGate verifies the activity-aware soft gate: a fresh
 // conversation holds trivia (unless critical), a long-idle owner is only woken by
-// an important event, and the in-between band does not over-suppress.
+// an important event — except a heartbeat pass, which is never held by a
+// long-silent gap (裁决 07.4.3) — and the in-between band does not over-suppress.
 func TestDecide_ActivityGate(t *testing.T) {
 	t.Parallel()
 	b := testBackthink()
 
-	// Just chatted (within RecentChatCooldown=10min): a normal daytime boredom
-	// push is held unless the event is safety-critical.
+	// Just chatted (within RecentChatCooldown=10min): a normal daytime push is
+	// held unless the event is safety-critical.
 	fresh := DecisionInput{
-		Import:       ImportanceNormal,
-		At:           dayAt(),
-		UserState:    UserState{Boredom: 0.9},
-		LastActivity: dayAt().Add(-5 * time.Minute),
-		HasActivity:  true,
+		Import:         ImportanceNormal,
+		At:             dayAt(),
+		UserState:      UserState{Boredom: 0.9},
+		LastActivity:   dayAt().Add(-5 * time.Minute),
+		HasActivity:    true,
+		ConclusionPush: true,
 	}
 	if got := b.Decide(fresh); got.ShouldPush {
 		t.Fatalf("fresh conversation should hold a normal push, got %+v", got)
@@ -186,29 +194,37 @@ func TestDecide_ActivityGate(t *testing.T) {
 		t.Fatalf("critical event should push even in a fresh conversation, got %+v", got)
 	}
 
-	// Away a long while (> longIdleThreshold): only an important event is worth it.
+	// Away a long while (> longIdleThreshold): only an important event is worth
+	// it — but a heartbeat pass still goes through (裁决 07.4.3 长期静默段不拦心跳).
 	idle := DecisionInput{
-		Import:       ImportanceNormal,
-		At:           dayAt(),
-		UserState:    UserState{Boredom: 0.9},
-		LastActivity: dayAt().Add(-3 * time.Hour),
-		HasActivity:  true,
+		Import:         ImportanceNormal,
+		At:             dayAt(),
+		UserState:      UserState{Boredom: 0.9},
+		LastActivity:   dayAt().Add(-3 * time.Hour),
+		HasActivity:    true,
+		ConclusionPush: true,
 	}
 	if got := b.Decide(idle); got.ShouldPush {
-		t.Fatalf("long idle should hold a normal push, got %+v", got)
+		t.Fatalf("long idle should hold a normal event push, got %+v", got)
 	}
 	idle.Import = ImportanceHigh
 	if got := b.Decide(idle); !got.ShouldPush {
 		t.Fatalf("long idle high-importance should push, got %+v", got)
 	}
+	idle.Import = ImportanceLow
+	idle.Heartbeat = true
+	if got := b.Decide(idle); !got.ShouldPush {
+		t.Fatalf("long idle heartbeat should still push (07.4.3), got %+v", got)
+	}
 
 	// Middling activity (30 min ago) is not over-suppressed.
 	middle := DecisionInput{
-		Import:       ImportanceNormal,
-		At:           dayAt(),
-		UserState:    UserState{Boredom: 0.9},
-		LastActivity: dayAt().Add(-30 * time.Minute),
-		HasActivity:  true,
+		Import:         ImportanceNormal,
+		At:             dayAt(),
+		UserState:      UserState{Boredom: 0.9},
+		LastActivity:   dayAt().Add(-30 * time.Minute),
+		HasActivity:    true,
+		ConclusionPush: true,
 	}
 	if got := b.Decide(middle); !got.ShouldPush {
 		t.Fatalf("middle-band activity should allow a normal push, got %+v", got)
diff --git a/internal/services/backthink/trigger.go b/internal/services/backthink/trigger.go
index b62390c..c2ac755 100644
--- a/internal/services/backthink/trigger.go
+++ b/internal/services/backthink/trigger.go
@@ -72,6 +72,18 @@ func heartbeatTrigger() Trigger {
 	return Trigger{Source: "heartbeat", Summary: "periodic autonomous reflection", Import: ImportanceLow, Kind: TriggerHeartbeat}
 }
 
+// StartupSummary 是启动轮思考（裁决 07.4.4，design/12 §1）的触发摘要。它同时是
+// context.go 里切换「拟人化启动消息」专属引导提示词的标识。
+const StartupSummary = "process startup"
+
+// startupTrigger 是进程启动后的第一轮思考（裁决 07.4.4）：不等满一个心跳周期，
+// 启动立即触发，并引导她以角色口吻产出一条拟人化启动问候（如「我回来啦」）。
+// Kind 仍为 TriggerHeartbeat：启动轮的推送与心跳走完全相同的门与限频
+// （PushGate / 打扰级联 / 活动门），进程反复重启也不会刷屏主人。
+func startupTrigger() Trigger {
+	return Trigger{Source: "startup", Summary: StartupSummary, Import: ImportanceLow, Kind: TriggerHeartbeat}
+}
+
 // triggerForEvent maps a bus event to a Trigger. An IoT device change is treated
 // as normal importance, a reminder firing as high importance, and a generic
 // system event as normal importance. Every event is tagged TriggerEvent so its