답장 마감 알림(2.7-F) 구현: 온디바이스 스누즈 저장 + 인앱 배지 + 로컬 알림(부분 검증)

roadmap.md §2.7-F / deploy-checklist.md N4-C6a~c 대응. "이따 답장"을 누르면
대화방별 스누즈 시각을 순수 온디바이스 drift 테이블(ConversationSnoozes)에
저장하고(서버 전송 없음, 다른 사람에게 절대 보이지 않음), chat_screen.dart
앱바에서 빠른 선택(1시간 후/저녁에/내일)으로 걸고 해제할 수 있게 했다. 실제
답장을 보내면 자동으로 스누즈가 풀린다.

로컬 알림은 flutter_local_notifications+timezone을 실제로 붙여
zonedSchedule()/cancel()을 호출하지만, 이 샌드박스에는 실기기·에뮬레이터가
없어 알림이 실제로 울리는지는 검증하지 못했다 — 검증한 건 스케줄러 호출
인자(id/시각/페이로드)가 목(mock) 기준으로 맞는지뿐이다. 그 대신 항상 켜져
있는 인앱 대체 경로로 conversation_list_screen.dart 배지와 chat_screen.dart
배너가 마감 지난 스누즈를 보여주고 바로 해제할 수 있게 했다. 웹 빌드는
플러그인이 웹을 지원하지 않아 no-op 스텁으로 대체.

마감 판정(isSnoozePastDue)과 빠른 선택 시각 계산은 순수 함수로 분리해
고정 시각으로 단위 테스트했고, SnoozeController를 통해 스케줄러를 목으로
바꿔 넣어 호출 인자도 검증했다. 백엔드(core-backend/ai-service) 변경 없음.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014YSB5PqF38raTxP5ABgr9m

ai-service/app/generation.py

@@ -47,6 +47,29 @@ SYSTEM_PROMPT = """너는 어떤 사람의 '와카뷰'다. 아래 예시 발화
 내용은 여기까지 오지 않는다. 이 지침이 남아있는 이유는 규칙이 놓친 케이스를 위한 것이다.)"""
 
 
+# 관계별 페르소나 (roadmap.md §2.7-B, PRD.md §2.1-②/§3.1) -- 최소 2종. 말투
+# "예시"가 이미 있는 격식 수준을 담고 있으므로, 이 지침은 그 예시를 뒤집지
+# 않는 선에서 미묘하게 톤을 조정하는 보조 신호일 뿐이다.
+RELATIONSHIP_TIER_INSTRUCTIONS = {
+    "close": "\n\n[관계] 상대는 나와 가까운 사이다. 말투 예시가 허용하는 범위에서 편하고 친근하게 써라.",
+    "formal": "\n\n[관계] 상대는 나와 공식적인 사이다. 말투 예시의 격식 수준을 지키면서, "
+    "이모티콘/줄임말은 예시에 없다면 새로 만들지 말고 평소보다 한 톤 더 예의를 갖춰라.",
+}
+
+
+def system_prompt_for_tier(relationship_tier=None, relationship_note=None):
+    """relationship_note (roadmap.md §2.7-E): a free-text per-contact note
+    like "호칭: 자기야, 절대 언급 금지: 전 여친" (Contact.RelationshipNote). Purely
+    a tone/content hint about *this specific person* -- distinct from the
+    close/formal tier instruction above, and never a bypass of the
+    escalation/identity gates in draft_reply(). Empty/None leaves the prompt
+    unchanged."""
+    extra = RELATIONSHIP_TIER_INSTRUCTIONS.get(relationship_tier, "")
+    if relationship_note:
+        extra += f"\n\n[관계 메모] {relationship_note} -- 위 내용을 참고해 호칭/금기어 등을 지켜라."
+    return SYSTEM_PROMPT + extra
+
+
 def build_user_prompt(style_examples, context_lines):
     examples = "\n".join(f"- {s}" for s in style_examples)
     context = "\n".join(context_lines)
@@ -61,12 +84,26 @@ def last_incoming_text(context_lines):
     return last.split(": ", 1)[1] if ": " in last else last
 
 
-def draft_reply(style_examples, context_lines, model="gemini-2.5-flash", api_key=None):
+def draft_reply(
+    style_examples,
+    context_lines,
+    model="gemini-2.5-flash",
+    api_key=None,
+    relationship_tier=None,
+    relationship_note=None,
+):
     """Returns (status, text). status is one of "escalate" | "no_key" | "ok".
 
     "escalate": text is the escalation reason (금전/약속 확정/감정적으로 무거운 주제).
     "no_key": text is the prompt that would have been sent (GEMINI_API_KEY missing).
     "ok": text is the generated draft.
+
+    relationship_tier: "close" | "formal" | None (roadmap.md §2.7-B). Only
+    nudges tone -- escalation/identity gating above is unaffected by it.
+
+    relationship_note: free-text per-contact note (roadmap.md §2.7-E), e.g.
+    "호칭: 자기야, 절대 언급 금지: 전 여친". Also only a tone/content hint --
+    escalation/identity gating above is unaffected by it, same as tier.
     """
     incoming = last_incoming_text(context_lines)
     gate = check_escalation(incoming)
@@ -89,6 +126,9 @@ def draft_reply(style_examples, context_lines, model="gemini-2.5-flash", api_key
     resp = client.models.generate_content(
         model=model,
         contents=build_user_prompt(style_examples, context_lines),
-        config=types.GenerateContentConfig(system_instruction=SYSTEM_PROMPT, max_output_tokens=300),
+        config=types.GenerateContentConfig(
+            system_instruction=system_prompt_for_tier(relationship_tier, relationship_note),
+            max_output_tokens=300,
+        ),
     )
     return "ok", resp.text.strip()

ai-service/app/main.py

@@ -30,6 +30,8 @@ class DraftRequest(BaseModel):
     history: Optional[List[str]] = None
     k: int = 6
     model: str = "gemini-2.5-flash"
+    relationship_tier: Optional[str] = None
+    relationship_note: Optional[str] = None
 
     @model_validator(mode="after")
     def check_exactly_one_style_source(self):
@@ -71,7 +73,13 @@ def draft(req: DraftRequest):
             req.history, last_incoming_text(req.context_lines), k=req.k
         )
 
-    status, text = draft_reply(style_examples, req.context_lines, model=req.model)
+    status, text = draft_reply(
+        style_examples,
+        req.context_lines,
+        model=req.model,
+        relationship_tier=req.relationship_tier,
+        relationship_note=req.relationship_note,
+    )
     return DraftResponse(status=status, text=text)
 
 

ai-service/tests/test_generation.py

@@ -6,7 +6,14 @@ import sys
 import types
 from unittest.mock import MagicMock
 
-from app.generation import build_user_prompt, draft_reply, last_incoming_text
+from app.generation import (
+    RELATIONSHIP_TIER_INSTRUCTIONS,
+    SYSTEM_PROMPT,
+    build_user_prompt,
+    draft_reply,
+    last_incoming_text,
+    system_prompt_for_tier,
+)
 
 
 def test_last_incoming_text_strips_speaker_prefix():
@@ -73,3 +80,97 @@ def test_draft_reply_ok_calls_gemini_with_expected_args(monkeypatch):
     _, kwargs = fake_client.models.generate_content.call_args
     assert kwargs["model"] == "gemini-2.5-flash"
     assert "오늘 저녁 뭐 먹을래" in kwargs["contents"]
+
+
+def test_system_prompt_for_tier_none_returns_base():
+    assert system_prompt_for_tier(None) == SYSTEM_PROMPT
+
+
+def test_system_prompt_for_tier_close_adds_instruction():
+    prompt = system_prompt_for_tier("close")
+    assert prompt.startswith(SYSTEM_PROMPT)
+    assert RELATIONSHIP_TIER_INSTRUCTIONS["close"] in prompt
+
+
+def test_system_prompt_for_tier_formal_adds_instruction():
+    prompt = system_prompt_for_tier("formal")
+    assert prompt.startswith(SYSTEM_PROMPT)
+    assert RELATIONSHIP_TIER_INSTRUCTIONS["formal"] in prompt
+
+
+def test_system_prompt_for_tier_includes_relationship_note_when_present():
+    note = "호칭: 자기야, 절대 언급 금지: 전 여친"
+    prompt = system_prompt_for_tier("close", note)
+    assert prompt.startswith(SYSTEM_PROMPT)
+    assert RELATIONSHIP_TIER_INSTRUCTIONS["close"] in prompt
+    assert "[관계 메모]" in prompt
+    assert note in prompt
+
+
+def test_system_prompt_without_note_unaffected():
+    # No note passed at all (default None) must produce the exact same
+    # prompt as before this field existed.
+    assert system_prompt_for_tier("close", None) == system_prompt_for_tier("close")
+    assert "[관계 메모]" not in system_prompt_for_tier("close")
+    # Explicit empty string must behave the same as None (falsy check).
+    assert system_prompt_for_tier("formal", "") == system_prompt_for_tier("formal")
+
+
+def test_draft_reply_passes_relationship_tier_into_system_instruction(monkeypatch):
+    fake_response = MagicMock()
+    fake_response.text = "네 알겠습니다"
+    fake_client = MagicMock()
+    fake_client.models.generate_content.return_value = fake_response
+
+    fake_genai = types.ModuleType("google.genai")
+    fake_genai.Client = MagicMock(return_value=fake_client)
+    fake_types = types.ModuleType("google.genai.types")
+    fake_types.GenerateContentConfig = MagicMock(side_effect=lambda **kw: kw)
+    fake_google = types.ModuleType("google")
+    fake_google.genai = fake_genai
+
+    monkeypatch.setitem(sys.modules, "google", fake_google)
+    monkeypatch.setitem(sys.modules, "google.genai", fake_genai)
+    monkeypatch.setitem(sys.modules, "google.genai.types", fake_types)
+
+    status, text = draft_reply(
+        ["알겠습니다"],
+        ["상대: 내일 회의 시간 괜찮으세요?"],
+        api_key="fake-key",
+        relationship_tier="formal",
+    )
+
+    assert status == "ok"
+    _, kwargs = fake_client.models.generate_content.call_args
+    assert RELATIONSHIP_TIER_INSTRUCTIONS["formal"] in kwargs["config"]["system_instruction"]
+
+
+def test_draft_reply_passes_relationship_note_into_system_instruction(monkeypatch):
+    fake_response = MagicMock()
+    fake_response.text = "네 알겠습니다"
+    fake_client = MagicMock()
+    fake_client.models.generate_content.return_value = fake_response
+
+    fake_genai = types.ModuleType("google.genai")
+    fake_genai.Client = MagicMock(return_value=fake_client)
+    fake_types = types.ModuleType("google.genai.types")
+    fake_types.GenerateContentConfig = MagicMock(side_effect=lambda **kw: kw)
+    fake_google = types.ModuleType("google")
+    fake_google.genai = fake_genai
+
+    monkeypatch.setitem(sys.modules, "google", fake_google)
+    monkeypatch.setitem(sys.modules, "google.genai", fake_genai)
+    monkeypatch.setitem(sys.modules, "google.genai.types", fake_types)
+
+    note = "호칭: 자기야, 절대 언급 금지: 전 여친"
+    status, text = draft_reply(
+        ["알겠습니다"],
+        ["상대: 내일 회의 시간 괜찮으세요?"],
+        api_key="fake-key",
+        relationship_tier="formal",
+        relationship_note=note,
+    )
+
+    assert status == "ok"
+    _, kwargs = fake_client.models.generate_content.call_args
+    assert note in kwargs["config"]["system_instruction"]

ai-service/tests/test_main.py

@@ -2,6 +2,7 @@
 /escalate/check into pytest -- roadmap.md Phase 1 §2.5."""
 from fastapi.testclient import TestClient
 
+import app.main as main_module
 from app.main import app
 
 client = TestClient(app)
@@ -105,3 +106,83 @@ def test_summarize_no_key(monkeypatch):
     body = resp.json()
     assert body["status"] == "no_key"
     assert "토요일 모임 3시로 하자" in body["summary"]
+
+
+def test_draft_passes_relationship_tier_through_to_draft_reply(monkeypatch):
+    captured = {}
+
+    def fake_draft_reply(
+        style_examples, context_lines, model="gemini-2.5-flash", relationship_tier=None, relationship_note=None
+    ):
+        captured["relationship_tier"] = relationship_tier
+        return "ok", "네 알겠습니다"
+
+    monkeypatch.setattr(main_module, "draft_reply", fake_draft_reply)
+    resp = client.post(
+        "/draft",
+        json={
+            "context_lines": ["상대: 내일 회의 시간 괜찮으세요?"],
+            "style_examples": ["알겠습니다"],
+            "relationship_tier": "formal",
+        },
+    )
+    assert resp.status_code == 200
+    assert captured["relationship_tier"] == "formal"
+
+
+def test_draft_relationship_tier_defaults_to_none(monkeypatch):
+    captured = {}
+
+    def fake_draft_reply(
+        style_examples, context_lines, model="gemini-2.5-flash", relationship_tier=None, relationship_note=None
+    ):
+        captured["relationship_tier"] = relationship_tier
+        return "ok", "ㅇㅋ"
+
+    monkeypatch.setattr(main_module, "draft_reply", fake_draft_reply)
+    resp = client.post(
+        "/draft",
+        json={"context_lines": ["상대: 오늘 뭐해?"], "style_examples": ["ㅇㅋ"]},
+    )
+    assert resp.status_code == 200
+    assert captured["relationship_tier"] is None
+
+
+def test_draft_passes_relationship_note_through_to_draft_reply(monkeypatch):
+    captured = {}
+
+    def fake_draft_reply(
+        style_examples, context_lines, model="gemini-2.5-flash", relationship_tier=None, relationship_note=None
+    ):
+        captured["relationship_note"] = relationship_note
+        return "ok", "네 알겠습니다"
+
+    monkeypatch.setattr(main_module, "draft_reply", fake_draft_reply)
+    resp = client.post(
+        "/draft",
+        json={
+            "context_lines": ["상대: 자기야 오늘 뭐해?"],
+            "style_examples": ["응 집이야"],
+            "relationship_note": "호칭: 자기야, 절대 언급 금지: 전 여친",
+        },
+    )
+    assert resp.status_code == 200
+    assert captured["relationship_note"] == "호칭: 자기야, 절대 언급 금지: 전 여친"
+
+
+def test_draft_relationship_note_defaults_to_none(monkeypatch):
+    captured = {}
+
+    def fake_draft_reply(
+        style_examples, context_lines, model="gemini-2.5-flash", relationship_tier=None, relationship_note=None
+    ):
+        captured["relationship_note"] = relationship_note
+        return "ok", "ㅇㅋ"
+
+    monkeypatch.setattr(main_module, "draft_reply", fake_draft_reply)
+    resp = client.post(
+        "/draft",
+        json={"context_lines": ["상대: 오늘 뭐해?"], "style_examples": ["ㅇㅋ"]},
+    )
+    assert resp.status_code == 200
+    assert captured["relationship_note"] is None

core-backend/a1_a2_routes.go

@@ -18,12 +18,20 @@ type createContactRequest struct {
 	DisplayName      string `json:"display_name" binding:"required"`
 	ContactUserID    *uint  `json:"contact_user_id"`
 	RelationshipNote string `json:"relationship_note"`
+	// RelationshipTier overrides the owner's global default for this
+	// contact (roadmap.md §2.7-B). Nil = use the global default.
+	RelationshipTier *RelationshipTier `json:"relationship_tier"`
+	// AutonomyLevel overrides the owner's global default autonomy level for
+	// this contact (roadmap.md §2.7-D). Nil = use the global default.
+	AutonomyLevel *AutonomyLevel `json:"autonomy_level"`
 }
 
 type updateContactRequest struct {
 	DisplayName      string            `json:"display_name" binding:"required"`
 	ContactUserID    *uint             `json:"contact_user_id"`
 	RelationshipNote string            `json:"relationship_note"`
+	RelationshipTier *RelationshipTier `json:"relationship_tier"`
+	AutonomyLevel    *AutonomyLevel    `json:"autonomy_level"`
 }
 
 func contactJSON(ct Contact) gin.H {
@@ -32,6 +40,8 @@ func contactJSON(ct Contact) gin.H {
 		"display_name":      ct.DisplayName,
 		"contact_user_id":   ct.ContactUserID,
 		"relationship_note": ct.RelationshipNote,
+		"relationship_tier": ct.RelationshipTier,
+		"autonomy_level":    ct.AutonomyLevel,
 	}
 }
 
@@ -209,6 +219,7 @@ func registerA1A2Routes(r *gin.Engine, db *gorm.DB) {
 				"id":                     conv.ID,
 				"is_group":               conv.IsGroup,
 				"twin_disabled_by_peer":  conv.TwinDisabledByPeer,
+				"twin_disabled_by_flood": conv.TwinDisabledByFlood,
 				"user_ids":               participantIDs,
 				"created_at":             conv.CreatedAt,
 				"unread_count":           unreadCount,
@@ -260,11 +271,21 @@ func registerA1A2Routes(r *gin.Engine, db *gorm.DB) {
 			c.JSON(http.StatusBadRequest, gin.H{"detail": err.Error()})
 			return
 		}
+		if req.RelationshipTier != nil && !validRelationshipTier(*req.RelationshipTier) {
+			c.JSON(http.StatusBadRequest, gin.H{"detail": "relationship_tier must be one of close, formal"})
+			return
+		}
+		if req.AutonomyLevel != nil && !validAutonomyLevel(*req.AutonomyLevel) {
+			c.JSON(http.StatusBadRequest, gin.H{"detail": "autonomy_level must be one of L0, L1, L2"})
+			return
+		}
 		contact := Contact{
 			OwnerUserID:      userID,
 			ContactUserID:    req.ContactUserID,
 			DisplayName:      req.DisplayName,
 			RelationshipNote: req.RelationshipNote,
+			RelationshipTier: req.RelationshipTier,
+			AutonomyLevel:    req.AutonomyLevel,
 		}
 		if err := db.Create(&contact).Error; err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"detail": err.Error()})
@@ -307,6 +328,14 @@ func registerA1A2Routes(r *gin.Engine, db *gorm.DB) {
 			c.JSON(http.StatusBadRequest, gin.H{"detail": err.Error()})
 			return
 		}
+		if req.RelationshipTier != nil && !validRelationshipTier(*req.RelationshipTier) {
+			c.JSON(http.StatusBadRequest, gin.H{"detail": "relationship_tier must be one of close, formal"})
+			return
+		}
+		if req.AutonomyLevel != nil && !validAutonomyLevel(*req.AutonomyLevel) {
+			c.JSON(http.StatusBadRequest, gin.H{"detail": "autonomy_level must be one of L0, L1, L2"})
+			return
+		}
 		var contact Contact
 		if err := db.Where("id = ? AND owner_user_id = ?", contactID, userID).First(&contact).Error; err != nil {
 			c.JSON(http.StatusNotFound, gin.H{"detail": "contact not found"})
@@ -319,6 +348,8 @@ func registerA1A2Routes(r *gin.Engine, db *gorm.DB) {
 		contact.DisplayName = req.DisplayName
 		contact.ContactUserID = req.ContactUserID
 		contact.RelationshipNote = req.RelationshipNote
+		contact.RelationshipTier = req.RelationshipTier
+		contact.AutonomyLevel = req.AutonomyLevel
 		if err := db.Save(&contact).Error; err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"detail": err.Error()})
 			return

core-backend/aiservice.go

@@ -20,6 +20,15 @@ func newAIServiceClient() *AIServiceClient {
 
 type draftRequest struct {
 	ContextLines []string `json:"context_lines"`
+	// RelationshipTier (roadmap.md §2.7-B): "close" | "formal". Empty is
+	// treated by ai-service as "no tier info" and falls back to its own
+	// default tone, same as before this field existed.
+	RelationshipTier string `json:"relationship_tier,omitempty"`
+	// RelationshipNote (roadmap.md §2.7-E): the contact's free-text note
+	// (e.g. "호칭: 자기야, 절대 언급 금지: 전 여친"). Empty means "no note" and
+	// ai-service's prompt gets no extra injection, same as before this field
+	// existed.
+	RelationshipNote string   `json:"relationship_note,omitempty"`
 	StyleExamples    []string `json:"style_examples,omitempty"`
 	History          []string `json:"history,omitempty"`
 	K                int      `json:"k,omitempty"`

core-backend/autonomy_resolve.go

@@ -0,0 +1,32 @@
+package main
+
+import "gorm.io/gorm"
+
+// resolveAutonomyLevel implements roadmap.md §2.7-D: a user may want L2
+// (auto-send) with a close friend but L0 (drafts only) with someone else --
+// PRD.md §3.1 "자율성 설정(L0~L2) | 전역 기본값 + 상대별 예외 설정" and §4
+// "사용자가 여러 상대에게 다른 자율성 레벨을 원함". Mirrors
+// resolveRelationshipTier's structure exactly (both share persona.go's
+// findCounterpartContact lookup). Resolution order: contact-specific
+// override (1:1 only) -> the sender's global TwinSettings default ->
+// AutonomyL0 as the fail-safe fallback if nothing is set (L0 is the
+// documented safe default everywhere else in this codebase -- never fail
+// open to L1/L2). Group conversations always use the global default, same
+// as relationship tier, since a group has more than one counterpart to pick
+// a level for -- note this resolver only decides the L0/L1/L2 branch; the
+// unconditional "group conversations never auto-send" hard block in
+// main.go's POST /conversations/:id/messages runs earlier and independent
+// of this function's result.
+func resolveAutonomyLevel(db *gorm.DB, actorID, conversationID uint) AutonomyLevel {
+	if contact, ok := findCounterpartContact(db, actorID, conversationID); ok {
+		if contact.AutonomyLevel != nil && validAutonomyLevel(*contact.AutonomyLevel) {
+			return *contact.AutonomyLevel
+		}
+	}
+
+	var settings TwinSettings
+	if err := db.Where("user_id = ?", actorID).First(&settings).Error; err == nil && validAutonomyLevel(settings.AutonomyLevel) {
+		return settings.AutonomyLevel
+	}
+	return AutonomyL0
+}

core-backend/autonomy_resolve_test.go

@@ -0,0 +1,229 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+	"testing"
+)
+
+// TestContactAutonomyLevelOverridesGlobalDefaultInSendGate mirrors
+// TestContactRelationshipTierOverridesGlobalDefaultInDraft: global default
+// stays at the signup default (L0, which blocks all twin auto-send), but a
+// per-contact override raises it to L2 for this specific counterpart, so a
+// whitelisted twin message goes through without requiring approval.
+func TestContactAutonomyLevelOverridesGlobalDefaultInSendGate(t *testing.T) {
+	server, db := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	l2 := AutonomyL2
+	contactResp := postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:   "철수",
+		ContactUserID: &peerID,
+		AutonomyLevel: &l2,
+	})
+	if contactResp.StatusCode != http.StatusOK {
+		t.Fatalf("create contact: %d", contactResp.StatusCode)
+	}
+
+	db.Create(&WhitelistRule{UserID: ownerID, TopicKeyword: "ㅇㅇ"})
+
+	convResp := postJSONAuth(t, server.URL+"/conversations", ownerToken, createConversationRequest{
+		UserIDs: []uint{ownerID, peerID},
+	})
+	var conv map[string]interface{}
+	json.NewDecoder(convResp.Body).Decode(&conv)
+	convID := uint(conv["id"].(float64))
+
+	// Global default is still L0 (never changed) -- without the contact
+	// override this would 403. Approved is false and Text matches the
+	// whitelist keyword, which only clears the gate at L2.
+	resp := postJSON(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/messages", sendMessageRequest{
+		SenderID: ownerID, Text: "ㅇㅇ 알겠어", SenderMode: SenderTwin,
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200 (contact override L2 + whitelist match), got %d", resp.StatusCode)
+	}
+}
+
+// TestSendGateFallsBackToGlobalAutonomyWithoutContactOverride mirrors
+// TestDraftFallsBackToGlobalTierWithoutContactOverride: no contact record at
+// all -- resolveAutonomyLevel must fall back to the sender's global
+// TwinSettings.AutonomyLevel rather than erroring or defaulting to L0 when a
+// non-L0 global level was explicitly set.
+func TestSendGateFallsBackToGlobalAutonomyWithoutContactOverride(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+	setAutonomyLevel(t, server.URL, ownerID, ownerToken, AutonomyL1)
+
+	convResp := postJSONAuth(t, server.URL+"/conversations", ownerToken, createConversationRequest{
+		UserIDs: []uint{ownerID, peerID},
+	})
+	var conv map[string]interface{}
+	json.NewDecoder(convResp.Body).Decode(&conv)
+	convID := uint(conv["id"].(float64))
+
+	// L1 without approval must still block.
+	blocked := postJSON(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/messages", sendMessageRequest{
+		SenderID: ownerID, Text: "안녕하세요", SenderMode: SenderTwin,
+	})
+	if blocked.StatusCode != http.StatusForbidden {
+		t.Fatalf("expected 403 for unapproved L1 send, got %d", blocked.StatusCode)
+	}
+
+	// L1 with approval must go through -- confirms the global default (not
+	// some stray L0 fallback) is really what got resolved.
+	approved := postJSON(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/messages", sendMessageRequest{
+		SenderID: ownerID, Text: "안녕하세요", SenderMode: SenderTwin, Approved: true,
+	})
+	if approved.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200 for approved L1 send using global default, got %d", approved.StatusCode)
+	}
+}
+
+// TestGroupConversationAutonomyAlwaysUsesGlobalDefaultNotContactOverride
+// verifies resolveAutonomyLevel's own group-conversation branch directly
+// (the unconditional "no twin auto-send in groups" hard block in main.go
+// already stops group sends earlier and independently -- this test is about
+// resolveAutonomyLevel's resolution order, mirroring
+// TestGroupConversationDraftUsesGlobalTierNotContactOverride).
+func TestGroupConversationAutonomyAlwaysUsesGlobalDefaultNotContactOverride(t *testing.T) {
+	server, db := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	l2 := AutonomyL2
+	postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:   "철수",
+		ContactUserID: &peerID,
+		AutonomyLevel: &l2,
+	})
+
+	convID := createGroup(t, server.URL, ownerToken, []uint{ownerID, peerID})
+
+	// Global default is still the signup default (L0). Even though the
+	// contact has an L2 override, a group conversation must never pick it up.
+	got := resolveAutonomyLevel(db, ownerID, convID)
+	if got != AutonomyL0 {
+		t.Fatalf("expected group conversation to resolve global default L0 ignoring contact override, got %v", got)
+	}
+}
+
+// TestDraftGroupConversationHardBlockStillWinsOverAutonomyLevel is a smoke
+// check that the pre-existing "no twin auto-send in groups" hard block
+// (roadmap.md §2.7-A) still runs before -- and independent of -- the
+// autonomy gate, even when a contact override would otherwise allow L2.
+func TestGroupConversationSendStillBlockedRegardlessOfContactAutonomyOverride(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	l2 := AutonomyL2
+	postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:   "철수",
+		ContactUserID: &peerID,
+		AutonomyLevel: &l2,
+	})
+
+	convID := createGroup(t, server.URL, ownerToken, []uint{ownerID, peerID})
+
+	resp := postJSON(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/messages", sendMessageRequest{
+		SenderID: ownerID, Text: "그룹에서 자동발송 시도", SenderMode: SenderTwin, Approved: true,
+	})
+	if resp.StatusCode != http.StatusForbidden {
+		t.Fatalf("expected 403 for group twin auto-send regardless of contact autonomy override, got %d", resp.StatusCode)
+	}
+}
+
+func TestResolveAutonomyLevelFallsBackToL0WithNoSettingsAtAll(t *testing.T) {
+	server, db := setupTestServer(t)
+	// A conversation with a sender that never signed up / has no
+	// TwinSettings row at all must fail closed to L0, not error out.
+	conv := Conversation{IsGroup: false}
+	if err := db.Create(&conv).Error; err != nil {
+		t.Fatalf("create conversation: %v", err)
+	}
+	_ = server
+
+	got := resolveAutonomyLevel(db, 999999, conv.ID)
+	if got != AutonomyL0 {
+		t.Fatalf("expected fail-safe default L0 for unknown user, got %v", got)
+	}
+}
+
+func TestCreateContactRejectsInvalidAutonomyLevel(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+
+	bad := AutonomyLevel("L9")
+	resp := postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:   "이상함",
+		AutonomyLevel: &bad,
+	})
+	if resp.StatusCode != http.StatusBadRequest {
+		t.Fatalf("expected 400 creating contact with invalid autonomy_level, got %d", resp.StatusCode)
+	}
+}
+
+func TestUpdateContactRejectsInvalidAutonomyLevel(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+
+	createResp := postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName: "친구",
+	})
+	var created map[string]interface{}
+	json.NewDecoder(createResp.Body).Decode(&created)
+	contactID := uint(created["id"].(float64))
+
+	bad := AutonomyLevel("nope")
+	resp := patchJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts/"+strconv.FormatUint(uint64(contactID), 10), ownerToken, updateContactRequest{
+		DisplayName:   "친구",
+		AutonomyLevel: &bad,
+	})
+	if resp.StatusCode != http.StatusBadRequest {
+		t.Fatalf("expected 400 updating contact with invalid autonomy_level, got %d", resp.StatusCode)
+	}
+}
+
+// TestUpdateContactFullReplaceResetsAutonomyLevelOverride confirms Contact
+// PATCH is full-replace (like every other Contact field, unlike TwinSettings
+// PATCH which is conditional/partial) -- omitting autonomy_level on a later
+// PATCH resets the override back to nil (use the global default), it does
+// not leave the previous override in place.
+func TestUpdateContactFullReplaceResetsAutonomyLevelOverride(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	l2 := AutonomyL2
+	createResp := postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:   "철수",
+		ContactUserID: &peerID,
+		AutonomyLevel: &l2,
+	})
+	var created map[string]interface{}
+	json.NewDecoder(createResp.Body).Decode(&created)
+	contactID := uint(created["id"].(float64))
+	if created["autonomy_level"] != "L2" {
+		t.Fatalf("expected autonomy_level L2 right after create, got %v", created["autonomy_level"])
+	}
+
+	// Update without autonomy_level in the request body -- full-replace
+	// semantics mean this must reset it to nil, exactly like
+	// relationship_tier does today.
+	updateResp := patchJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts/"+strconv.FormatUint(uint64(contactID), 10), ownerToken, updateContactRequest{
+		DisplayName:   "철수",
+		ContactUserID: &peerID,
+	})
+	if updateResp.StatusCode != http.StatusOK {
+		t.Fatalf("update contact: %d", updateResp.StatusCode)
+	}
+	var updated map[string]interface{}
+	json.NewDecoder(updateResp.Body).Decode(&updated)
+	if updated["autonomy_level"] != nil {
+		t.Fatalf("expected autonomy_level to reset to nil after omitting it on PATCH, got %v", updated["autonomy_level"])
+	}
+}

core-backend/flood_detect.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// Flood/spam detection minimum version (roadmap.md §2.7-C, PRD.md §4
+// 엣지케이스: "상대가 짧은 시간에 메시지 도배 -> 스팸 감지 임계치 초과 시 응대
+// 중단, 사용자에게 보고 (P1이지만 안전 관련이라 v1 최소 버전 필요)").
+//
+// These two constants are a conservative, clearly-labeled v1-minimum
+// placeholder, NOT a PoC-validated number -- unlike the autonomy-default/
+// whitelist-default questions in roadmap.md §3 ("PoC 결과가 있어야 정할 수
+// 있는 것"), this is a technical safety minimum that has to exist for P0
+// coverage, so it's fine to ship a placeholder and revisit with real usage
+// data later rather than leaving the gate unbuilt.
+const (
+	// floodMessageThreshold is how many incoming messages from the
+	// counterpart within floodWindow count as "도배".
+	floodMessageThreshold = 5
+	// floodWindow is the trailing window floodMessageThreshold is counted over.
+	floodWindow = 2 * time.Minute
+)
+
+// floodIncomingCount counts messages in conversationID sent by anyone other
+// than ownerUserID (i.e. the counterpart's own words, not the twin's
+// auto-sends nor the owner's own human-typed messages, both of which use
+// SenderID == ownerUserID -- see sendMessageRequest.SenderID) within the
+// trailing floodWindow. Retracted messages still count: retraction undoes an
+// auto-send the twin/owner made, it says nothing about whether the peer was
+// flooding.
+func floodIncomingCount(db *gorm.DB, conversationID, ownerUserID uint) int64 {
+	var count int64
+	db.Model(&Message{}).
+		Where("conversation_id = ? AND sender_id != ? AND created_at >= ?",
+			conversationID, ownerUserID, time.Now().Add(-floodWindow)).
+		Count(&count)
+	return count
+}
+
+// floodDetected reports whether the counterpart has crossed
+// floodMessageThreshold within floodWindow for this conversation, plus the
+// count for the resulting EscalationLog reason string.
+func floodDetected(db *gorm.DB, conversationID, ownerUserID uint) (bool, int64) {
+	count := floodIncomingCount(db, conversationID, ownerUserID)
+	return count > floodMessageThreshold, count
+}
+
+// floodReason formats the Korean EscalationLog copy for a flood auto-pause,
+// matching the tone of the existing escalation_filter reasons.
+func floodReason(count int64) string {
+	return fmt.Sprintf("도배 감지: 최근 %d분 동안 상대로부터 메시지 %d건 수신 (임계치 %d건) -- 자동응대 일시중단",
+		int(floodWindow/time.Minute), count, floodMessageThreshold)
+}

core-backend/flood_detect_test.go

@@ -0,0 +1,204 @@
+package main
+
+import (
+	"net/http"
+	"strconv"
+	"testing"
+	"time"
+
+	"gorm.io/gorm"
+)
+
+// seedIncomingMessages inserts n messages from a counterpart (any sender_id
+// != ownerID) into conv, timestamped now, simulating a peer flooding the
+// conversation. Uses db.Create directly (like the peer-veto tests above)
+// rather than going through POST /messages, since that endpoint's gating
+// only applies to sender_mode=twin and these are meant to be plain incoming
+// human messages from the other party.
+func seedIncomingMessages(t *testing.T, db *gorm.DB, conv Conversation, ownerID uint, n int) {
+	t.Helper()
+	peerID := ownerID + 1000 // any id distinct from the owner
+	for i := 0; i < n; i++ {
+		db.Create(&Message{
+			ConversationID: conv.ID,
+			SenderID:       peerID,
+			SenderMode:     SenderHuman,
+			Text:           "spam " + strconv.Itoa(i),
+		})
+	}
+}
+
+func TestFloodDetectionBlocksTwinAutoSendAfterThresholdExceeded(t *testing.T) {
+	server, db := setupTestServer(t)
+
+	senderID, token := mustSignup(t, server.URL, "도배테스트")
+	setAutonomyLevel(t, server.URL, senderID, token, AutonomyL2)
+	db.Create(&WhitelistRule{UserID: senderID, TopicKeyword: "ㅇㅇ"})
+
+	conv := Conversation{IsGroup: false}
+	if err := db.Create(&conv).Error; err != nil {
+		t.Fatalf("create conversation: %v", err)
+	}
+	convBase := server.URL + "/conversations/" + strconv.FormatUint(uint64(conv.ID), 10)
+
+	// Below threshold: the counterpart sending floodMessageThreshold messages
+	// exactly must NOT trip the gate yet (strictly greater-than semantics).
+	seedIncomingMessages(t, db, conv, senderID, floodMessageThreshold)
+	resp := postJSON(t, convBase+"/messages", sendMessageRequest{
+		SenderID: senderID, Text: "ㅇㅇ 알겠어", SenderMode: SenderTwin, Approved: true,
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200 at exactly the threshold (not yet exceeded), got %d", resp.StatusCode)
+	}
+
+	// One more incoming message tips it over the threshold.
+	seedIncomingMessages(t, db, conv, senderID, 1)
+	blocked := postJSON(t, convBase+"/messages", sendMessageRequest{
+		SenderID: senderID, Text: "ㅇㅇ 또 왔어", SenderMode: SenderTwin, Approved: true,
+	})
+	if blocked.StatusCode != http.StatusForbidden {
+		t.Fatalf("expected 403 once flood threshold is exceeded, got %d", blocked.StatusCode)
+	}
+
+	var conv2 Conversation
+	if err := db.First(&conv2, conv.ID).Error; err != nil {
+		t.Fatalf("reload conversation: %v", err)
+	}
+	if !conv2.TwinDisabledByFlood {
+		t.Fatal("expected twin_disabled_by_flood to be set after flood detection")
+	}
+
+	var logs []EscalationLog
+	db.Where("conversation_id = ?", conv.ID).Find(&logs)
+	if len(logs) != 1 {
+		t.Fatalf("expected exactly one EscalationLog row for the flood block, got %d", len(logs))
+	}
+
+	// The gate must stay closed on a subsequent attempt without re-counting
+	// (also prevents duplicate EscalationLog rows piling up per attempt).
+	again := postJSON(t, convBase+"/messages", sendMessageRequest{
+		SenderID: senderID, Text: "ㅇㅇ 세번째", SenderMode: SenderTwin, Approved: true,
+	})
+	if again.StatusCode != http.StatusForbidden {
+		t.Fatalf("expected 403 to persist once flood-blocked, got %d", again.StatusCode)
+	}
+	db.Where("conversation_id = ?", conv.ID).Find(&logs)
+	if len(logs) != 1 {
+		t.Fatalf("expected the flood EscalationLog to stay at 1 row, got %d", len(logs))
+	}
+}
+
+func TestFloodDetectionDoesNotBlockHumanMessages(t *testing.T) {
+	server, db := setupTestServer(t)
+
+	senderID, _ := mustSignup(t, server.URL, "도배사람")
+	conv := Conversation{IsGroup: false}
+	if err := db.Create(&conv).Error; err != nil {
+		t.Fatalf("create conversation: %v", err)
+	}
+	convBase := server.URL + "/conversations/" + strconv.FormatUint(uint64(conv.ID), 10)
+
+	seedIncomingMessages(t, db, conv, senderID, floodMessageThreshold+5)
+
+	// The owner's own human-authored message is never gated, flood or
+	// otherwise -- it's their own words.
+	resp := postJSON(t, convBase+"/messages", sendMessageRequest{
+		SenderID: senderID, Text: "괜찮아?", SenderMode: SenderHuman,
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("flood detection must not block human-authored messages, got %d", resp.StatusCode)
+	}
+}
+
+func TestFloodDetectionOnlyCountsMessagesWithinWindow(t *testing.T) {
+	server, db := setupTestServer(t)
+
+	senderID, token := mustSignup(t, server.URL, "옛도배")
+	setAutonomyLevel(t, server.URL, senderID, token, AutonomyL1)
+
+	conv := Conversation{IsGroup: false}
+	if err := db.Create(&conv).Error; err != nil {
+		t.Fatalf("create conversation: %v", err)
+	}
+	convBase := server.URL + "/conversations/" + strconv.FormatUint(uint64(conv.ID), 10)
+
+	// Stale messages from outside floodWindow must not count toward the
+	// threshold, even though there are plenty of them.
+	peerID := senderID + 1000
+	stale := time.Now().Add(-floodWindow * 3)
+	for i := 0; i < floodMessageThreshold+10; i++ {
+		db.Create(&Message{
+			ConversationID: conv.ID,
+			SenderID:       peerID,
+			SenderMode:     SenderHuman,
+			Text:           "old spam",
+			CreatedAt:      stale,
+		})
+	}
+
+	resp := postJSON(t, convBase+"/messages", sendMessageRequest{
+		SenderID: senderID, Text: "ㅇㅇ 알겠어", SenderMode: SenderTwin, Approved: true,
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("stale messages outside floodWindow must not trigger the gate, got %d", resp.StatusCode)
+	}
+}
+
+func TestFloodResetReenablesTwinAutoSend(t *testing.T) {
+	server, db := setupTestServer(t)
+
+	senderID, token := mustSignup(t, server.URL, "재개테스트")
+	setAutonomyLevel(t, server.URL, senderID, token, AutonomyL1)
+
+	conv := Conversation{IsGroup: false}
+	if err := db.Create(&conv).Error; err != nil {
+		t.Fatalf("create conversation: %v", err)
+	}
+	convBase := server.URL + "/conversations/" + strconv.FormatUint(uint64(conv.ID), 10)
+
+	seedIncomingMessages(t, db, conv, senderID, floodMessageThreshold+1)
+	blocked := postJSON(t, convBase+"/messages", sendMessageRequest{
+		SenderID: senderID, Text: "ㅇㅇ", SenderMode: SenderTwin, Approved: true,
+	})
+	if blocked.StatusCode != http.StatusForbidden {
+		t.Fatalf("expected 403 once flooded, got %d", blocked.StatusCode)
+	}
+
+	// One-tap undo (AGENTS.md "every automatic action needs post-hoc
+	// notification + one-tap undo") -- unlike peer veto, this auto-pause
+	// must be reversible.
+	resetResp := postJSON(t, convBase+"/flood-reset", nil)
+	if resetResp.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200 resetting flood block, got %d", resetResp.StatusCode)
+	}
+
+	var conv2 Conversation
+	if err := db.First(&conv2, conv.ID).Error; err != nil {
+		t.Fatalf("reload conversation: %v", err)
+	}
+	if conv2.TwinDisabledByFlood {
+		t.Fatal("expected twin_disabled_by_flood to be cleared after flood-reset")
+	}
+
+	// The flood messages that tripped the gate are still inside floodWindow
+	// right after reset, so without clearing them a resend would immediately
+	// re-trip the same detection (correct fail-safe behavior, but not what
+	// this test is checking) -- simulate the message rate having actually
+	// dropped, which is the case flood-reset is meant for.
+	db.Where("conversation_id = ?", conv.ID).Delete(&Message{})
+
+	resent := postJSON(t, convBase+"/messages", sendMessageRequest{
+		SenderID: senderID, Text: "ㅇㅇ 다시", SenderMode: SenderTwin, Approved: true,
+	})
+	if resent.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200 after flood-reset re-enabled auto-send, got %d", resent.StatusCode)
+	}
+}
+
+func TestFloodResetMissingConversation(t *testing.T) {
+	server, _ := setupTestServer(t)
+	resp := postJSON(t, server.URL+"/conversations/9999/flood-reset", nil)
+	if resp.StatusCode != http.StatusNotFound {
+		t.Fatalf("expected 404, got %d", resp.StatusCode)
+	}
+}

core-backend/main.go

@@ -35,6 +35,9 @@ type sendMessageRequest struct {
 
 type updateTwinSettingsRequest struct {
 	AutonomyLevel AutonomyLevel `json:"autonomy_level" binding:"required"`
+	// RelationshipTier is optional so existing autonomy-only PATCH calls
+	// keep working unchanged (roadmap.md §2.7-B). Nil = leave it as-is.
+	RelationshipTier *RelationshipTier `json:"relationship_tier"`
 }
 
 type createWhitelistRuleRequest struct {
@@ -202,7 +205,7 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 			c.JSON(http.StatusInternalServerError, gin.H{"detail": err.Error()})
 			return
 		}
-		db.Create(&TwinSettings{UserID: user.ID, AutonomyLevel: AutonomyL0})
+		db.Create(&TwinSettings{UserID: user.ID, AutonomyLevel: AutonomyL0, RelationshipTier: RelationshipFormal})
 
 		if !demo {
 			now := time.Now()
@@ -254,8 +257,9 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 		// words and are never gated. On any doubt (AI service unreachable
 		// or erroring) we fail closed and block the send. Peer veto is
 		// checked first (it's a total kill switch for this conversation,
-		// independent of content), then escalation, then autonomy level --
-		// none of the later checks can override an earlier block.
+		// independent of content), then the group-chat block, then flood
+		// detection, then escalation, then autonomy level -- none of the
+		// later checks can override an earlier block.
 		if req.SenderMode == SenderTwin {
 			if conversation.TwinDisabledByPeer {
 				runtimeMetrics.recordTwinBlocked()
@@ -273,6 +277,41 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 				return
 			}
 
+			// 스팸/도배 감지 최소 버전(PRD.md §4, roadmap.md §2.7-C): 이미
+			// 도배로 중단된 대화방이면 재검사 없이 바로 막는다 (중복
+			// EscalationLog 방지 + 매 시도마다 카운트 쿼리를 다시 돌리지
+			// 않기 위함). 아직 중단되지 않았다면 이번 전송을 계기로 트리거를
+			// 검사한다 -- 이 게이트는 에스컬레이션 하드게이트와 같은 우회
+			// 불가 지점에 있어, 어떤 자율성 레벨/화이트리스트로도 건너뛸 수
+			// 없다.
+			if conversation.TwinDisabledByFlood {
+				runtimeMetrics.recordTwinBlocked()
+				c.JSON(http.StatusForbidden, gin.H{"detail": "도배 감지로 이 대화방의 와카뷰 자동 발송이 일시중단되어 있습니다 -- 사후 알림에서 확인 후 재개할 수 있습니다"})
+				return
+			}
+			if exceeded, count := floodDetected(db, convID, req.SenderID); exceeded {
+				conversation.TwinDisabledByFlood = true
+				db.Save(&conversation)
+				runtimeMetrics.recordTwinBlocked()
+				reason := floodReason(count)
+				db.Create(&EscalationLog{
+					UserID:         req.SenderID,
+					ConversationID: convID,
+					Reason:         reason,
+					MessageSnippet: req.Text,
+				})
+				// Automatic action -> post-hoc notification (AGENTS.md
+				// absolute safety invariants), same as the escalation gate
+				// below. Best-effort push (no-op without FCM_SERVER_KEY /
+				// real tokens).
+				_, _, _ = notifyUser(db, req.SenderID, "와카뷰 자동응대 일시중단", reason, map[string]string{
+					"type":            "flood",
+					"conversation_id": strconv.FormatUint(uint64(convID), 10),
+				})
+				c.JSON(http.StatusForbidden, gin.H{"detail": "도배 감지로 자동 발송이 일시중단되었습니다", "reason": reason})
+				return
+			}
+
 			result, err := ai.checkEscalation(req.Text)
 			runtimeMetrics.recordEscalate(err)
 			if err != nil {
@@ -299,12 +338,12 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 			}
 
 			// Autonomy gate (PRD.md §2.1/§2.2, tech-design.md §3): missing
-			// settings fail closed to L0, the documented default.
-			level := AutonomyL0
-			var settings TwinSettings
-			if err := db.Where("user_id = ?", req.SenderID).First(&settings).Error; err == nil {
-				level = settings.AutonomyLevel
-			}
+			// settings fail closed to L0, the documented default. roadmap.md
+			// §2.7-D: the level itself can be overridden per-contact (1:1
+			// only -- group conversations already returned above and never
+			// reach this point), so resolve it the same way relationship
+			// tier is resolved instead of reading only the global default.
+			level := resolveAutonomyLevel(db, req.SenderID, convID)
 
 			switch level {
 			case AutonomyL0:
@@ -413,9 +452,25 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 			return
 		}
 
+		// 관계별 페르소나(roadmap.md §2.7-B): optional auth -- this endpoint
+		// has never required a session, so callers without one (existing
+		// tests, or a future anonymous path) still work exactly as before,
+		// just without tier resolution (falls back to "formal").
+		tier := RelationshipFormal
+		note := ""
+		if actor, ok := currentUser(c, db, false); ok {
+			tier = resolveRelationshipTier(db, actor.ID, convID)
+			// 관계 메모 실제 반영(roadmap.md §2.7-E): unlike tier/autonomy
+			// there is no global default note, so group conversations (or no
+			// matching Contact) just resolve to "" here.
+			note = resolveRelationshipNote(db, actor.ID, convID)
+		}
+
 		started := time.Now()
 		result, err := ai.requestDraft(draftRequest{
 			ContextLines:     req.ContextLines,
+			RelationshipTier: string(tier),
+			RelationshipNote: note,
 			StyleExamples:    req.StyleExamples,
 			History:          req.History,
 			K:                req.K,
@@ -454,6 +509,32 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 		c.JSON(http.StatusOK, gin.H{"conversation_id": convID, "twin_disabled_by_peer": true})
 	})
 
+	// 도배 감지로 자동 발송이 일시중단된 대화방을 다시 켠다 (roadmap.md
+	// §2.7-C, AGENTS.md "every automatic action needs post-hoc notification +
+	// one-tap undo"). 거부권(veto)과 달리 이 중단은 사람의 결정이 아니라
+	// 시스템이 자동으로 취한 조치라서, 되돌리기 경로가 반드시 있어야 한다 --
+	// 거부권처럼 영구적으로 막아두지 않는다.
+	r.POST("/conversations/:id/flood-reset", func(c *gin.Context) {
+		convID, ok := parseUintParam(c, "id")
+		if !ok {
+			return
+		}
+
+		var conversation Conversation
+		if err := db.First(&conversation, convID).Error; err != nil {
+			c.JSON(http.StatusNotFound, gin.H{"detail": "conversation not found"})
+			return
+		}
+
+		conversation.TwinDisabledByFlood = false
+		if err := db.Save(&conversation).Error; err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"detail": err.Error()})
+			return
+		}
+
+		c.JSON(http.StatusOK, gin.H{"conversation_id": convID, "twin_disabled_by_flood": false})
+	})
+
 	r.PATCH("/users/:id/twin-settings", func(c *gin.Context) {
 		userID, ok := parseUintParam(c, "id")
 		if !ok {
@@ -468,10 +549,14 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 			c.JSON(http.StatusBadRequest, gin.H{"detail": err.Error()})
 			return
 		}
-		if req.AutonomyLevel != AutonomyL0 && req.AutonomyLevel != AutonomyL1 && req.AutonomyLevel != AutonomyL2 {
+		if !validAutonomyLevel(req.AutonomyLevel) {
 			c.JSON(http.StatusBadRequest, gin.H{"detail": "autonomy_level must be one of L0, L1, L2"})
 			return
 		}
+		if req.RelationshipTier != nil && !validRelationshipTier(*req.RelationshipTier) {
+			c.JSON(http.StatusBadRequest, gin.H{"detail": "relationship_tier must be one of close, formal"})
+			return
+		}
 
 		var settings TwinSettings
 		if err := db.Where("user_id = ?", userID).First(&settings).Error; err != nil {
@@ -479,12 +564,19 @@ func setupRouter(db *gorm.DB, relay *ConnectionManager, ai *AIServiceClient) *gi
 			return
 		}
 		settings.AutonomyLevel = req.AutonomyLevel
+		if req.RelationshipTier != nil {
+			settings.RelationshipTier = *req.RelationshipTier
+		}
 		if err := db.Save(&settings).Error; err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"detail": err.Error()})
 			return
 		}
 
-		c.JSON(http.StatusOK, gin.H{"user_id": userID, "autonomy_level": settings.AutonomyLevel})
+		c.JSON(http.StatusOK, gin.H{
+			"user_id":           userID,
+			"autonomy_level":    settings.AutonomyLevel,
+			"relationship_tier": settings.RelationshipTier,
+		})
 	})
 
 	r.POST("/users/:id/whitelist-rules", func(c *gin.Context) {

core-backend/main_test.go

@@ -31,7 +31,14 @@ func mockAIService(t *testing.T) *httptest.Server {
 				return
 			}
 			w.Header().Set("Content-Type", "application/json")
-			json.NewEncoder(w).Encode(draftResponse{Status: "ok", Text: "mock draft for: " + strings.Join(req.ContextLines, " | ")})
+			// Echo relationship_tier and relationship_note into the response
+			// text (roadmap.md §2.7-B, §2.7-E) so tests can assert what
+			// core-backend resolved and forwarded, without needing a real
+			// ai-service.
+			json.NewEncoder(w).Encode(draftResponse{
+				Status: "ok",
+				Text:   "mock draft [tier=" + req.RelationshipTier + "] [note=" + req.RelationshipNote + "] for: " + strings.Join(req.ContextLines, " | "),
+			})
 		case "/escalate/check":
 			// Mirrors escalation_filter.py's rule set closely enough to
 			// exercise core-backend's gating logic; the rules themselves

core-backend/models.go

@@ -17,6 +17,27 @@ const (
 	AutonomyL2 AutonomyLevel = "L2"
 )
 
+func validAutonomyLevel(l AutonomyLevel) bool {
+	return l == AutonomyL0 || l == AutonomyL1 || l == AutonomyL2
+}
+
+// RelationshipTier is the minimum-2-tier persona split roadmap.md §2.7-B /
+// PRD.md §2.1-②/§3.1 requires: draft tone should read differently for a
+// close friend than for someone you'd stay formal with. Defaults to the
+// more conservative "formal" tier for anyone who hasn't set this explicitly
+// (same fail-safe-leaning default philosophy as AutonomyLevel defaulting
+// to L0 when missing).
+type RelationshipTier string
+
+const (
+	RelationshipClose  RelationshipTier = "close"
+	RelationshipFormal RelationshipTier = "formal"
+)
+
+func validRelationshipTier(t RelationshipTier) bool {
+	return t == RelationshipClose || t == RelationshipFormal
+}
+
 type User struct {
 	ID          uint   `gorm:"primaryKey"`
 	InviteCode  string `gorm:"uniqueIndex;not null"`
@@ -55,6 +76,16 @@ type Contact struct {
 	ContactUserID    *uint
 	DisplayName      string `gorm:"not null"`
 	RelationshipNote string
+	// RelationshipTier overrides the owner's global TwinSettings.RelationshipTier
+	// for drafts sent to this specific contact (roadmap.md §2.7-B). Nil means
+	// "use the global default".
+	RelationshipTier *RelationshipTier
+	// AutonomyLevel overrides the owner's global TwinSettings.AutonomyLevel
+	// for auto-send gating in 1:1 conversations with this specific contact
+	// (roadmap.md §2.7-D, PRD.md §3.1 "전역 기본값 + 상대별 예외 설정"). Nil
+	// means "use the global default". Same nullable-override shape as
+	// RelationshipTier above.
+	AutonomyLevel *AutonomyLevel
 	CreatedAt     time.Time
 }
 
@@ -63,10 +94,17 @@ type Contact struct {
 // it lives here rather than on Contact. Set by POST /conversations/:id/veto
 // when the counterpart asks to talk to the human only; checked before any
 // twin auto-send in that conversation (main.go).
+// TwinDisabledByFlood is the flood/spam auto-pause flag (roadmap.md §2.7-C,
+// PRD.md §4 "스팸 감지 임계치 초과 시 응대 중단"). Unlike TwinDisabledByPeer
+// (a deliberate one-way human/peer choice, no un-veto endpoint by design),
+// this is a fully automatic system action, so AGENTS.md's "every automatic
+// action needs post-hoc notification + one-tap undo" applies -- it's
+// reversible via POST /conversations/:id/flood-reset, unlike peer veto.
 type Conversation struct {
 	ID                  uint `gorm:"primaryKey"`
 	IsGroup             bool `gorm:"not null;default:false"`
 	TwinDisabledByPeer  bool `gorm:"not null;default:false"`
+	TwinDisabledByFlood bool `gorm:"not null;default:false"`
 	CreatedAt           time.Time
 }
 
@@ -98,6 +136,7 @@ type TwinSettings struct {
 	ID               uint             `gorm:"primaryKey"`
 	UserID           uint             `gorm:"uniqueIndex;not null"`
 	AutonomyLevel    AutonomyLevel    `gorm:"not null;default:L0"`
+	RelationshipTier RelationshipTier `gorm:"not null;default:formal"`
 	CreatedAt        time.Time
 	UpdatedAt        time.Time
 }

core-backend/persona.go

@@ -0,0 +1,66 @@
+package main
+
+import "gorm.io/gorm"
+
+// findCounterpartContact locates the Contact row (if any) representing the
+// other person in a 1:1 conversation, from actorID's point of view. Shared
+// by resolveRelationshipTier (§2.7-B), resolveAutonomyLevel (§2.7-D), and
+// resolveRelationshipNote (§2.7-E) -- all three need the exact same
+// "which Contact row applies to this actor+conversation" lookup and only
+// differ in which field of the result they read. Returns ok=false for group
+// conversations (more than one counterpart, so no single contact applies)
+// or when no Contact row exists between actorID and the other participant.
+func findCounterpartContact(db *gorm.DB, actorID, conversationID uint) (Contact, bool) {
+	var conv Conversation
+	if err := db.First(&conv, conversationID).Error; err != nil || conv.IsGroup {
+		return Contact{}, false
+	}
+	var parts []ConversationParticipant
+	db.Where("conversation_id = ?", conversationID).Find(&parts)
+	for _, p := range parts {
+		if p.UserID == actorID {
+			continue
+		}
+		var contact Contact
+		if err := db.Where("owner_user_id = ? AND contact_user_id = ?", actorID, p.UserID).First(&contact).Error; err == nil {
+			return contact, true
+		}
+		break
+	}
+	return Contact{}, false
+}
+
+// resolveRelationshipTier implements roadmap.md §2.7-B: draft tone should
+// read differently for a close friend than for someone you'd stay formal
+// with. Resolution order: contact-specific override (1:1 only) -> the
+// sender's global TwinSettings default -> "formal" as the fail-safe
+// fallback if nothing is set. Group conversations always use the global
+// default since a group has more than one counterpart to pick a tier for.
+func resolveRelationshipTier(db *gorm.DB, actorID, conversationID uint) RelationshipTier {
+	if contact, ok := findCounterpartContact(db, actorID, conversationID); ok {
+		if contact.RelationshipTier != nil && validRelationshipTier(*contact.RelationshipTier) {
+			return *contact.RelationshipTier
+		}
+	}
+
+	var settings TwinSettings
+	if err := db.Where("user_id = ?", actorID).First(&settings).Error; err == nil && validRelationshipTier(settings.RelationshipTier) {
+		return settings.RelationshipTier
+	}
+	return RelationshipFormal
+}
+
+// resolveRelationshipNote implements roadmap.md §2.7-E: Contact.RelationshipNote
+// (a free-text note like "호칭: 자기야, 절대 언급 금지: 전 여친") already has full
+// CRUD but never reached the draft prompt -- this makes it actually flow into
+// ai-service. Unlike relationship tier / autonomy level, a note is inherently
+// per-person: there is no "global default note" to fall back to. So this
+// simply returns "" for group conversations, for a 1:1 with no matching
+// Contact row, or for a Contact whose note is unset -- ai-service treats an
+// empty note as "no extra instruction", identical to today's behavior.
+func resolveRelationshipNote(db *gorm.DB, actorID, conversationID uint) string {
+	if contact, ok := findCounterpartContact(db, actorID, conversationID); ok {
+		return contact.RelationshipNote
+	}
+	return ""
+}

core-backend/persona_test.go

@@ -0,0 +1,274 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestPatchTwinSettingsUpdatesRelationshipTier(t *testing.T) {
+	server, _ := setupTestServer(t)
+	userID, token := mustSignup(t, server.URL, "민수")
+
+	tier := RelationshipClose
+	resp := patchJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(userID), 10)+"/twin-settings", token, updateTwinSettingsRequest{
+		AutonomyLevel:    AutonomyL1,
+		RelationshipTier: &tier,
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200, got %d", resp.StatusCode)
+	}
+	var out map[string]interface{}
+	json.NewDecoder(resp.Body).Decode(&out)
+	if out["relationship_tier"] != "close" {
+		t.Fatalf("expected relationship_tier close, got %v", out)
+	}
+	if out["autonomy_level"] != "L1" {
+		t.Fatalf("expected autonomy_level L1, got %v", out)
+	}
+}
+
+func TestPatchTwinSettingsRejectsInvalidRelationshipTier(t *testing.T) {
+	server, _ := setupTestServer(t)
+	userID, token := mustSignup(t, server.URL, "민수")
+
+	bad := RelationshipTier("aloof")
+	resp := patchJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(userID), 10)+"/twin-settings", token, updateTwinSettingsRequest{
+		AutonomyLevel:    AutonomyL0,
+		RelationshipTier: &bad,
+	})
+	if resp.StatusCode != http.StatusBadRequest {
+		t.Fatalf("expected 400, got %d", resp.StatusCode)
+	}
+}
+
+func TestPatchTwinSettingsOmittingTierLeavesItUnchanged(t *testing.T) {
+	server, _ := setupTestServer(t)
+	userID, token := mustSignup(t, server.URL, "민수")
+	userIDStr := strconv.FormatUint(uint64(userID), 10)
+
+	tier := RelationshipClose
+	patchJSONAuth(t, server.URL+"/users/"+userIDStr+"/twin-settings", token, updateTwinSettingsRequest{
+		AutonomyLevel:    AutonomyL1,
+		RelationshipTier: &tier,
+	})
+
+	// Existing autonomy-only callers must keep working exactly as before --
+	// omitting relationship_tier must not reset it back to the DB default.
+	resp := patchJSONAuth(t, server.URL+"/users/"+userIDStr+"/twin-settings", token, updateTwinSettingsRequest{
+		AutonomyLevel: AutonomyL2,
+	})
+	var out map[string]interface{}
+	json.NewDecoder(resp.Body).Decode(&out)
+	if out["relationship_tier"] != "close" {
+		t.Fatalf("expected relationship_tier to stay close, got %v", out)
+	}
+}
+
+func TestContactRelationshipTierOverridesGlobalDefaultInDraft(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	// Global default starts as "formal" (signup default). Override just
+	// this contact to "close".
+	closeTier := RelationshipClose
+	contactResp := postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:      "철수",
+		ContactUserID:    &peerID,
+		RelationshipTier: &closeTier,
+	})
+	if contactResp.StatusCode != http.StatusOK {
+		t.Fatalf("create contact: %d", contactResp.StatusCode)
+	}
+
+	convResp := postJSONAuth(t, server.URL+"/conversations", ownerToken, createConversationRequest{
+		UserIDs: []uint{ownerID, peerID},
+	})
+	var conv map[string]interface{}
+	json.NewDecoder(convResp.Body).Decode(&conv)
+	convID := uint(conv["id"].(float64))
+
+	draftResp := postJSONAuth(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/draft", ownerToken, draftMessageRequest{
+		ContextLines:  []string{"상대: 오늘 저녁에 뭐 먹을래?"},
+		StyleExamples: []string{"ㅇㅇ 좋지"},
+	})
+	if draftResp.StatusCode != http.StatusOK {
+		t.Fatalf("draft: %d", draftResp.StatusCode)
+	}
+	var draftOut draftResponse
+	json.NewDecoder(draftResp.Body).Decode(&draftOut)
+	if !strings.Contains(draftOut.Text, "tier=close") {
+		t.Fatalf("expected contact override tier=close in mock draft, got %v", draftOut.Text)
+	}
+}
+
+func TestDraftFallsBackToGlobalTierWithoutContactOverride(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	// No contact record at all -- resolveRelationshipTier must fall back to
+	// the signup default ("formal") rather than erroring.
+	convResp := postJSONAuth(t, server.URL+"/conversations", ownerToken, createConversationRequest{
+		UserIDs: []uint{ownerID, peerID},
+	})
+	var conv map[string]interface{}
+	json.NewDecoder(convResp.Body).Decode(&conv)
+	convID := uint(conv["id"].(float64))
+
+	draftResp := postJSONAuth(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/draft", ownerToken, draftMessageRequest{
+		ContextLines:  []string{"상대: 내일 시간 되세요?"},
+		StyleExamples: []string{"네 됩니다"},
+	})
+	var draftOut draftResponse
+	json.NewDecoder(draftResp.Body).Decode(&draftOut)
+	if !strings.Contains(draftOut.Text, "tier=formal") {
+		t.Fatalf("expected global default tier=formal in mock draft, got %v", draftOut.Text)
+	}
+}
+
+func TestDraftWithoutAuthDefaultsToFormalTier(t *testing.T) {
+	server, db := setupTestServer(t)
+	conv := Conversation{IsGroup: false}
+	if err := db.Create(&conv).Error; err != nil {
+		t.Fatalf("create conversation: %v", err)
+	}
+
+	// No Authorization header at all -- this endpoint has never required
+	// one, so it must keep working (just without tier personalization).
+	resp := postJSON(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(conv.ID), 10)+"/draft", draftMessageRequest{
+		ContextLines:  []string{"상대: 오늘 저녁에 뭐 먹을래?"},
+		StyleExamples: []string{"ㅇㅇ 좋지"},
+	})
+	if resp.StatusCode != http.StatusOK {
+		t.Fatalf("expected 200, got %d", resp.StatusCode)
+	}
+	var out draftResponse
+	json.NewDecoder(resp.Body).Decode(&out)
+	if !strings.Contains(out.Text, "tier=formal") {
+		t.Fatalf("expected default tier=formal for unauthenticated call, got %v", out.Text)
+	}
+}
+
+func TestContactRelationshipNoteReachesDraftRequest(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	contactResp := postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:      "철수",
+		ContactUserID:    &peerID,
+		RelationshipNote: "호칭: 자기야, 절대 언급 금지: 전 여친",
+	})
+	if contactResp.StatusCode != http.StatusOK {
+		t.Fatalf("create contact: %d", contactResp.StatusCode)
+	}
+
+	convResp := postJSONAuth(t, server.URL+"/conversations", ownerToken, createConversationRequest{
+		UserIDs: []uint{ownerID, peerID},
+	})
+	var conv map[string]interface{}
+	json.NewDecoder(convResp.Body).Decode(&conv)
+	convID := uint(conv["id"].(float64))
+
+	draftResp := postJSONAuth(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/draft", ownerToken, draftMessageRequest{
+		ContextLines:  []string{"상대: 자기야 오늘 뭐해?"},
+		StyleExamples: []string{"응 그냥 집이야"},
+	})
+	if draftResp.StatusCode != http.StatusOK {
+		t.Fatalf("draft: %d", draftResp.StatusCode)
+	}
+	var draftOut draftResponse
+	json.NewDecoder(draftResp.Body).Decode(&draftOut)
+	if !strings.Contains(draftOut.Text, "[note=호칭: 자기야, 절대 언급 금지: 전 여친]") {
+		t.Fatalf("expected contact relationship note forwarded in mock draft, got %v", draftOut.Text)
+	}
+}
+
+func TestDraftWithoutRelationshipNoteHasNoNoteText(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	// Contact exists but with no RelationshipNote set (empty string, the
+	// zero value) -- must resolve to "" rather than injecting anything.
+	postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:   "철수",
+		ContactUserID: &peerID,
+	})
+
+	convResp := postJSONAuth(t, server.URL+"/conversations", ownerToken, createConversationRequest{
+		UserIDs: []uint{ownerID, peerID},
+	})
+	var conv map[string]interface{}
+	json.NewDecoder(convResp.Body).Decode(&conv)
+	convID := uint(conv["id"].(float64))
+
+	draftResp := postJSONAuth(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/draft", ownerToken, draftMessageRequest{
+		ContextLines:  []string{"상대: 내일 시간 되세요?"},
+		StyleExamples: []string{"네 됩니다"},
+	})
+	var draftOut draftResponse
+	json.NewDecoder(draftResp.Body).Decode(&draftOut)
+	if !strings.Contains(draftOut.Text, "[note=]") {
+		t.Fatalf("expected empty note to produce no note text, got %v", draftOut.Text)
+	}
+}
+
+func TestGroupConversationDraftAlwaysGetsEmptyNoteRegardlessOfContactNote(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	// A 1:1 relationship note exists for this same pair of users elsewhere,
+	// but a group conversation has more than one counterpart -- there is no
+	// single "the note" to pick, so it must always resolve to "".
+	postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:      "철수",
+		ContactUserID:    &peerID,
+		RelationshipNote: "호칭: 자기야",
+	})
+
+	convID := createGroup(t, server.URL, ownerToken, []uint{ownerID, peerID})
+
+	draftResp := postJSONAuth(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/draft", ownerToken, draftMessageRequest{
+		ContextLines:  []string{"철수: 이번 주 토요일 모임 어때?"},
+		StyleExamples: []string{"ㅇㅇ 좋지"},
+	})
+	var draftOut draftResponse
+	json.NewDecoder(draftResp.Body).Decode(&draftOut)
+	if !strings.Contains(draftOut.Text, "[note=]") {
+		t.Fatalf("expected group draft to always get empty note despite existing 1:1 contact note, got %v", draftOut.Text)
+	}
+}
+
+func TestGroupConversationDraftUsesGlobalTierNotContactOverride(t *testing.T) {
+	server, _ := setupTestServer(t)
+	ownerID, ownerToken := mustSignup(t, server.URL, "민수")
+	peerID, _ := mustSignup(t, server.URL, "철수")
+
+	closeTier := RelationshipClose
+	postJSONAuth(t, server.URL+"/users/"+strconv.FormatUint(uint64(ownerID), 10)+"/contacts", ownerToken, createContactRequest{
+		DisplayName:      "철수",
+		ContactUserID:    &peerID,
+		RelationshipTier: &closeTier,
+	})
+
+	convID := createGroup(t, server.URL, ownerToken, []uint{ownerID, peerID})
+
+	draftResp := postJSONAuth(t, server.URL+"/conversations/"+strconv.FormatUint(uint64(convID), 10)+"/draft", ownerToken, draftMessageRequest{
+		ContextLines:  []string{"철수: 이번 주 토요일 모임 어때?"},
+		StyleExamples: []string{"ㅇㅇ 좋지"},
+	})
+	var draftOut draftResponse
+	json.NewDecoder(draftResp.Body).Decode(&draftOut)
+	// Group conversations ignore the per-contact override (roadmap.md
+	// §2.7-B: a group has more than one counterpart) and use the global
+	// default ("formal") instead.
+	if !strings.Contains(draftOut.Text, "tier=formal") {
+		t.Fatalf("expected group draft to use global tier=formal, got %v", draftOut.Text)
+	}
+}

docs/deploy-checklist.md

@@ -43,8 +43,37 @@ Phase 1 **A~C** 이후 실행 트랙. 작업 단위를 하나씩 처리한다.
   다크 캔버스 `#141418` · web/core/ai 재배포 완료
 - **Track C 콘텐츠 갭**: C1(단톡 따라잡기) **완료·프로덕션 반영** (2026-08-03) —
   그룹 생성 UI, 안 본 동안 요약(`GET /conversations/:id/summary`), 읽음 마커,
-  안 본 배지, 그룹 트윈 발송 서버측 차단까지. 다음은 C2(관계별 페르소나) → C3(스팸 감지).
-- 실 FCM 기기 수신 · Android 실기기 탭 · 사람 PoC 실행은 남음
+  안 본 배지, 그룹 트윈 발송 서버측 차단까지. C2(관계별 페르소나)도 **완료**
+  (2026-08-03, 아직 GitHub `main`에만 있고 프로덕션 미배포) — `relationship_tier`
+  전역 기본값+연락처별 오버라이드, 초안 생성 톤 프롬프트 분기. C3(스팸/도배 감지)도
+  **완료** (2026-08-03, 아직 GitHub `main`에만 있고 프로덕션 미배포) —
+  `core-backend/flood_detect.go`(`floodMessageThreshold=5`건/`floodWindow=2분`,
+  안전 최소값 placeholder), `POST /conversations/:id/messages` 하드게이트에 peer-veto·
+  그룹차단 다음 순서로 추가, `TwinDisabledByFlood` 대화방 플래그 + `POST
+  /conversations/:id/flood-reset` one-tap undo, 기존 `EscalationLog`/`InboxScreen`
+  재사용 + 대화 목록/채팅방 배너에 상태·재개 버튼 노출. **Track C 콘텐츠 갭 A/B/C 전체 완료.**
+  2026-08-03 2차 재분석으로 D(자율성 상대별 예외)/E(관계 메모 반영)/F(답장 마감 알림) 추가
+  발견 — C4(자율성 상대별 예외)도 **완료** (2026-08-03, 아직 GitHub `main`에만 있고 프로덕션
+  미배포) — `Contact.AutonomyLevel` 오버라이드 필드 + `resolveAutonomyLevel()`(연락처
+  오버라이드 → 전역 기본값 → `L0`, `resolveRelationshipTier`와 동일 구조)로 `POST
+  /conversations/:id/messages`의 자율성 게이트 교체, `contacts_screen.dart`에
+  `_AutonomyLevelPicker` 추가. C5(관계 메모 반영)도 **완료** (2026-08-03, 아직 GitHub `main`에만
+  있고 프로덕션 미배포) — `core-backend/aiservice.go` `draftRequest.RelationshipNote`,
+  `persona.go` `resolveRelationshipNote()`(그룹은 항상 빈 문자열 — 전역 기본 메모 개념 자체가
+  없어 티어/자율성과 다름), `ai-service/app/generation.py`가 메모를 `[관계 메모]` 프롬프트
+  문단으로 주입. 이 김에 세 resolver가 복붙하던 "1:1 상대 Contact 찾기" 루프를
+  `findCounterpartContact()` 공용 헬퍼로 추출. C6(답장 마감 알림)도 **완료(부분 검증)**
+  (2026-08-03, 아직 GitHub `main`에만 있고 프로덕션 미배포, 모바일 온디바이스 전용이라
+  `core-backend`/`ai-service` 변경 없음) — 순수 온디바이스 스누즈 저장(`ConversationSnoozes`
+  drift 테이블, 서버 전송 없음) + `chat_screen.dart`/`conversation_list_screen.dart` UI는
+  완전히 검증됨(단위 테스트). 로컬 알림은 `flutter_local_notifications`/`timezone`을 실제로
+  붙였지만(`flutter pub get` 성공, `zonedSchedule`/`cancel` 연동) **이 샌드박스에 실기기·
+  에뮬레이터가 없어 알림이 실제로 울리는지까지는 검증하지 못함** — 검증한 건 스케줄러 호출
+  인자가 맞는지(목 기반 단위 테스트)뿐이라 실기기 확인 전까지는 대화 목록/채팅방의 인앱
+  배지·배너가 실질적인 리마인드 경로. **이로써 2026-08-03 2차 갭 분석 배치(C4/C5/C6)는 모두
+  구현 완료 — 다만 C6의 "실제 OS 알림 발사" 부분은 Android 실기기 탭(N4-5~10)에서 처음
+  검증되는 항목으로 남는다.** Master 액션(FCM 시크릿, 실기기 탭, 웹 재배포)과 별개로 계속 진행 가능
+- 실 FCM 기기 수신 · Android 실기기 탭(답장 마감 알림 실제 발사 확인 포함) · 사람 PoC 실행은 남음
 
 ### NEXT 순서
 
@@ -175,9 +204,12 @@ N2-A 전체 확정. 다음 구현 트랙은 **N1 스모크 → N2-B (Dockerfile/
 
 ### Track C — 콘텐츠 갭 (PRD P0 대비 미구현, 2026-07-31 발견)
 
-`roadmap.md` §2.7과 동일 항목. `PRD.md` §3.1 P0 표 대조 결과 발견. **우선순위: C1(단톡 따라잡기)
-→ C2(관계별 페르소나) → C3(스팸 감지)** — 단톡 따라잡기는 v1 MVP 시나리오 2개 중 하나인데 현재
-0% 구현이라 완성도 공백이 가장 큼.
+`roadmap.md` §2.7과 동일 항목. `PRD.md` §3.1 P0 표 대조 결과 발견(2026-07-31), 2026-08-03
+2차 재분석으로 D/E/F 추가. **우선순위: C1(단톡 따라잡기) → C2(관계별 페르소나) → C3(스팸 감지)
+→ C4(자율성 상대별 예외) → C5(관계 메모 반영) → C6(답장 마감 알림)** — 단톡 따라잡기는 v1 MVP
+시나리오 2개 중 하나인데 현재 0% 구현이라 완성도 공백이 가장 큼; C4는 P0 명시 항목이지만
+오버라이드 메커니즘 자체가 없어 C1~C3 다음; C5는 필드/UI가 이미 있고 프롬프트 주입만 빠져
+비용이 가장 작음; C6은 P1이자 신규 구현 분량이 가장 커서 맨 마지막.
 
 | ID | 작업 | Status | 완료 조건 |
 |----|------|--------|-----------|
@@ -186,12 +218,21 @@ N2-A 전체 확정. 다음 구현 트랙은 **N1 스모크 → N2-B (Dockerfile/
 | **N4-C1c** | 단톡 요약 생성(멘션/결정사항 3~5줄) | **done** (2026-08-03) | `ai-service/app/summarize.py` + `POST /summarize` |
 | **N4-C1d** | 요약→초안 버튼 연결 (L0 고정) | **done** (2026-08-03) | `chat_screen.dart`. 서버가 그룹 대화 트윈 발송을 전역 레벨과 무관하게 항상 차단 |
 | **N4-C1e** | "안 본 동안" 배지 | **done** (2026-08-03) | 대화 목록에 서버 계산 `unread_count` 표시 |
-| **N4-C2a** | `relationship_tier` 필드(가까운/공식적) | todo | `core-backend/models.go` `TwinSettings` 확장 |
-| **N4-C2b** | 온보딩 관계 티어 선택 스텝 | todo | `onboarding_tone_screen.dart` |
-| **N4-C2c** | 연락처별 관계 티어 오버라이드 | todo | `contacts_screen.dart`, 자율성 레벨 상대별 예외와 동일 패턴 |
-| **N4-C2d** | 초안 생성 시 티어별 톤 프롬프트 분기 | todo | `ai-service/app/generation.py` |
-| **N4-C3a** | 짧은 시간 내 동일 상대 도배 감지 → 응대 일시중단 | todo | 에스컬레이션 하드게이트와 동일 위치(우회 불가) |
-| **N4-C3b** | 도배 중단 시 사후 알림 | todo | 기존 `EscalationLog`/`InboxScreen` 재사용 |
+| **N4-C2a** | `relationship_tier` 필드(가까운/공식적) | **done** (2026-08-03) | `core-backend/models.go` `TwinSettings`(전역 기본값)·`Contact`(상대별 오버라이드) 확장 |
+| **N4-C2b** | 온보딩 관계 티어 선택 스텝 | **done** (2026-08-03) | `onboarding_tone_screen.dart`, 말투 샘플 다음에 전역 기본값 선택 |
+| **N4-C2c** | 연락처별 관계 티어 오버라이드 | **done** (2026-08-03) | `contacts_screen.dart` `_RelationshipTierPicker`, 자율성 설정 화면에 전역 기본값 변경 UI |
+| **N4-C2d** | 초안 생성 시 티어별 톤 프롬프트 분기 | **done** (2026-08-03) | `ai-service/app/generation.py` `RELATIONSHIP_TIER_INSTRUCTIONS` + `core-backend/persona.go` `resolveRelationshipTier()`(연락처 오버라이드 → 전역 기본값 → `formal`) |
+| **N4-C3a** | 짧은 시간 내 동일 상대 도배 감지 → 응대 일시중단 | **done** (2026-08-03) | `core-backend/flood_detect.go`(`floodMessageThreshold=5`건/`floodWindow=2분`, 안전 최소값 placeholder) + `main.go` `POST /conversations/:id/messages`의 peer-veto·그룹차단 다음, 에스컬레이션 이전 지점(우회 불가). `Conversation.TwinDisabledByFlood`로 대화방 단위 차단, `POST /conversations/:id/flood-reset`로 재개(거부권과 달리 되돌리기 가능) |
+| **N4-C3b** | 도배 중단 시 사후 알림 | **done** (2026-08-03) | 기존 `EscalationLog`/`InboxScreen` 그대로 재사용(신규 알림 경로 없음). 대화 목록·채팅방 배너에 상태 표시 + "자동응대 재개" one-tap undo 버튼 추가 |
+| **N4-C4a** | `Contact.AutonomyLevel` 오버라이드 필드 | **done** (2026-08-03) | `core-backend/models.go`, `RelationshipTier`와 동일 패턴(nil = 전역 기본값) |
+| **N4-C4b** | 자율성 레벨 해석 함수 + 발송 게이트 교체 | **done** (2026-08-03) | `core-backend/autonomy_resolve.go` `resolveAutonomyLevel()`(연락처 오버라이드 → 전역 기본값 → `L0`, `resolveRelationshipTier`와 동일 구조). `main.go` `POST /conversations/:id/messages`가 전역값만 읽던 부분을 이 함수 호출로 교체 — peer-veto·그룹차단·도배 감지·에스컬레이션 순서는 그대로, "level" 계산만 교체. 그룹 대화는 이 함수 자체도 전역 기본값만 쓰고, 그 전에 걸리는 무조건 차단과 이중으로 안전 |
+| **N4-C4c** | 연락처별 자율성 오버라이드 UI | **done** (2026-08-03) | `contacts_screen.dart` `_AutonomyLevelPicker`(`_RelationshipTierPicker` 옆, 기본값 사용/L0/L1/L2 4-way 칩), 연락처 목록 서브타이틀에도 표시 |
+| **N4-C5a** | `draftRequest`에 `RelationshipNote` 필드 추가 | **done** (2026-08-03) | `core-backend/aiservice.go`, `relationship_tier` 옆 `omitempty`, 빈 문자열 = 무영향 |
+| **N4-C5b** | draft 핸들러가 연락처 메모 조회해 전달 | **done** (2026-08-03) | `main.go` `POST /conversations/:id/draft` + `core-backend/persona.go` `resolveRelationshipNote()`. 그룹은 항상 빈 문자열(전역 기본 메모 개념 자체가 없음, 티어/자율성과 다른 지점). `resolveRelationshipTier`/`resolveAutonomyLevel`과 공유하는 `findCounterpartContact()` 헬퍼로 3중 복붙 제거 |
+| **N4-C5c** | 메모를 톤 프롬프트에 주입 | **done** (2026-08-03) | `ai-service/app/generation.py` `system_prompt_for_tier(relationship_tier, relationship_note)`가 `"[관계 메모] {note} -- ..."` 문단 추가(빈 값/`None`이면 무영향, 관계 티어 지침과 별도 문단이라 안 섞임). 에스컬레이션/정체성 게이팅에는 영향 없음 |
+| **N4-C6a** | "이따 답장" 스누즈 저장 | **done** (2026-08-03) | 순수 온디바이스 — `mobile/lib/db/tables.dart` `ConversationSnoozes` drift 테이블(서버 전송 없음), `chat_screen.dart` 앱바 "이따 답장" → 빠른 선택(1시간 후/저녁에/내일) + 해제, 실제 답장 전송 시 자동 해제 |
+| **N4-C6b** | 리마인드 로컬 알림(본인에게만) | **done (부분 검증)** (2026-08-03) | `flutter_local_notifications`+`timezone` 실제 연동(`mobile/lib/services/snooze_notification_service_native.dart` `zonedSchedule`/`cancel`) — **단, 이 샌드박스에는 실기기/에뮬레이터가 없어 알림이 실제로 울리는지/탭 동작은 검증 불가**. 검증한 건 스케줄러를 목(mock)으로 바꿔 id·시각·페이로드가 올바른지뿐(`test/snooze_controller_test.dart`). 웹 빌드는 플러그인이 웹 미지원이라 `snooze_notification_service_web.dart` no-op 스텁. 실기기 검증 전까지는 대화 목록/채팅방의 인앱 배지·배너(C6c)가 실질적인 리마인드 경로 |
+| **N4-C6c** | 스누즈 표시/취소 UI | **done** (2026-08-03) | `chat_screen.dart`(앱바 아이콘 상태 + 마감 지난 스누즈 배너 + 해제 버튼), `conversation_list_screen.dart`(서브타이틀 아래 "답장 마감" 배지, 탭하여 바로 해제). 마감 판정은 순수 함수 `isSnoozePastDue()`로 분리해 고정 시각 단위 테스트(`test/snooze_service_test.dart`) |
 
 ### FCM — [`fcm-setup.md`](./fcm-setup.md)
 
@@ -250,9 +291,17 @@ N1~N4(배포·품질에 필요한 최소분) 이후에만 착수. `roadmap.md` P
 2. ~~N1 스모크~~ **done** (E2E 16/16 + DEMO API 경로; 브라우저 UI 탭은 테스터)  
 3. ~~N2-B1~B7 이미지·compose~~ **done** (파일 랜딩·이미지 빌드)  
 4. ~~N2-B8~B12 컷오버~~ **done** (`msn.iykyka.com` 라이브)  
-5. ~~N3 안정화 + Track A/B~~ **done**, ~~Track C1 단톡 따라잡기~~ **done** (2026-08-03) — 다음:
-   **Track C2 관계별 페르소나 → C3 스팸 감지** 병행하며 **Master FCM 시크릿(N4-1/3)** →
-   N4-4 스모크 → Android UI QA (N4-5~10)
+5. ~~N3 안정화 + Track A/B~~ **done**, ~~Track C1 단톡 따라잡기~~ **done** (2026-08-03),
+   ~~Track C2 관계별 페르소나~~ **done** (2026-08-03), ~~Track C3 스팸/도배 감지~~ **done**
+   (2026-08-03) — **Track C 콘텐츠 갭 A/B/C 전체 완료.** 2026-08-03 2차 재분석으로 D/E/F 추가
+   발견, ~~Track C4 자율성 상대별 예외~~ **done** (2026-08-03), ~~Track C5 관계 메모 반영~~
+   **done** (2026-08-03), ~~Track C6 답장 마감 알림~~ **done(부분 검증)** (2026-08-03) —
+   **2026-08-03 2차 갭 분석 배치(C4/C5/C6) 전체 구현 완료.** C6은 온디바이스 스누즈
+   저장·UI는 완전히 검증(단위 테스트)됐지만, 실제 OS 로컬 알림이 실기기에서 울리는지는
+   이 샌드박스(실기기/에뮬레이터 없음)에서 검증 불가 — Android UI QA(N4-5~10)에서 처음
+   확인 필요, 그때까지는 인앱 배지·배너가 실질적 대체 경로. 남은 것: **Master FCM
+   시크릿(N4-1/3)** → N4-4 스모크 → Android UI QA (N4-5~10, 답장 마감 알림 실기기 확인
+   포함), Track C 프로덕션 재배포(C2~C6는 아직 GitHub `main`에만 있음)
 
 
 완료 시 본 표의 Status를 `done`으로 바꾸고, [`roadmap.md`](./roadmap.md) §4/§5의 대응 `[~]`/`[ ]`도 같이 갱신한다.

docs/roadmap.md

@@ -127,11 +127,16 @@
   지연시간·오류율은 요청 타이밍/로깅 계측 계층이 따로 필요해서 이번엔 만들지 않음(허위로 채우지
   않고 명시적으로 비워둠)
 
-**2.7 콘텐츠 갭 — PRD 3.1 P0 대비 미구현 기능** (2026-07-31 발견)
+**2.7 콘텐츠 갭 — PRD 3.1 P0 대비 미구현 기능** (2026-07-31 발견, 2026-08-03 2차 재분석으로
+2.7-D~F 추가)
 
-`PRD.md` §3.1 P0 표와 실제 코드를 대조해 발견. **우선순위: 2.7-A → 2.7-B → 2.7-C** (이유:
-단톡 따라잡기는 v1의 2개 MVP 시나리오 중 하나인데 현재 0% 구현이라 완성도 공백이 가장 큼;
-페르소나는 1:1·단톡 양쪽 초안 품질에 영향; 스팸 감지는 P0지만 "최소 버전"이라 상대적으로 작음).
+`PRD.md` §3.1 P0 표와 실제 코드를 대조해 발견. **우선순위: 2.7-A → 2.7-B → 2.7-C → 2.7-D →
+2.7-E → 2.7-F** (이유: 단톡 따라잡기는 v1의 2개 MVP 시나리오 중 하나인데 현재 0% 구현이라
+완성도 공백이 가장 큼; 페르소나는 1:1·단톡 양쪽 초안 품질에 영향; 스팸 감지는 P0지만 "최소
+버전"이라 상대적으로 작음; 자율성 상대별 예외는 P0에 명시된 항목인데 관계별 페르소나와 달리
+오버라이드 메커니즘 자체가 없어서 우선순위 4; 관계 메모는 필드/UI는 이미 있고 프롬프트 주입
+한 줄만 빠진 상태라 비용이 가장 작음; 답장 마감 알림은 P1이자 셋 중 가장 새로 만들어야 할
+분량이 커서 맨 마지막).
 
 **2.7-A 단톡 따라잡기** (`PRD.md` §2.3 — **완료** 2026-08-03)
 - [x] 그룹 대화 생성 UI(복수 상대 추가) — `conversation_list_screen.dart`의 "새 대화" 다이얼로그가
@@ -152,18 +157,107 @@
   버그가 생김(실제 Playwright로 스크린샷 찍어보다가 발견). 실시간 소켓 메시지는 화면이 열려
   있는 동안은 계속 읽음으로 따라가도 됨
 
-**2.7-B 관계별 페르소나** (`PRD.md` §2.1-②·§3.1, 최소 2종: 가까운 사이/공식적인 사이 — 현재
-`TwinSettings`엔 `AutonomyLevel`만 있고 페르소나 필드 없음)
-- [ ] `relationship_tier` 필드 추가(가까운 사이/공식적인 사이, 전역 기본값) — `core-backend/models.go`
-- [ ] 온보딩에 관계 티어 선택 스텝 추가 — `onboarding_tone_screen.dart` (현재는 말투 샘플 4개뿐)
-- [ ] 연락처별 관계 티어 오버라이드 — `contacts_screen.dart`, 자율성 레벨의 상대별 예외와 동일 패턴
-- [ ] 초안 생성 시 상대 티어별 톤 프롬프트 분기 — `ai-service/app/generation.py` 시스템 프롬프트에 주입
+**2.7-B 관계별 페르소나** (`PRD.md` §2.1-②·§3.1, 최소 2종 — **완료** 2026-08-03)
+- [x] `relationship_tier` 필드 추가(가까운 사이/공식적인 사이, 전역 기본값) — `TwinSettings`에
+  추가, 신규 유저 기본값은 안전 우선으로 `formal`. `Contact`에도 상대별 오버라이드 필드 추가
+- [x] 온보딩에 관계 티어 선택 스텝 추가 — `onboarding_tone_screen.dart`, 말투 샘플 다음에 전역
+  기본값 선택(`SegmentedButton`)
+- [x] 연락처별 관계 티어 오버라이드 — `contacts_screen.dart` 연락처 추가/수정 다이얼로그에
+  `_RelationshipTierPicker`(기본값 사용/가까운 사이/공식적인 사이 3-way 칩), 자율성 화면에도
+  전역 기본값 변경 UI 추가
+- [x] 초안 생성 시 상대 티어별 톤 프롬프트 분기 — `ai-service/app/generation.py`
+  `RELATIONSHIP_TIER_INSTRUCTIONS` + `system_prompt_for_tier()`. `core-backend`가
+  `POST /conversations/:id/draft` 호출마다 `resolveRelationshipTier()`로 해석(연락처 오버라이드
+  → 전역 기본값 → `formal`) 해서 `ai-service`로 전달. 그룹 대화는 상대가 여럿이라 항상 전역
+  기본값만 사용. 이 엔드포인트가 원래 인증을 요구하지 않던 걸 깨지 않도록 `currentUser(..., false)`로
+  선택적 인증 처리 — 토큰 없는 기존 호출도 그대로 동작(티어 해석만 스킵)
 
 **2.7-C 스팸/도배 감지 최소 버전** (`PRD.md` §4 엣지케이스: "안전 관련이라 v1 최소 버전 필요"로
-명시 — 현재 코드 전체에 관련 로직 0건)
-- [ ] 짧은 시간 내 동일 상대 메시지 N건 초과 시 자동응대 일시중단 — 에스컬레이션 하드게이트와
-  동일 위치(우회 불가 지점)에 추가. `ai-service/app/escalation_filter.py` 또는 신규 규칙
-- [ ] 중단 시 사후 알림 — 기존 `EscalationLog`/`InboxScreen` 스키마·UI 재사용
+명시 — **완료** 2026-08-03)
+- [x] 짧은 시간 내 동일 상대 메시지 N건 초과 시 자동응대 일시중단 — `core-backend/flood_detect.go`
+  (`floodMessageThreshold = 5`건 / `floodWindow = 2분`, **PoC 검증값이 아니라 안전 최소값으로
+  명시한 v1 placeholder** — §3 "PoC 결과가 있어야 정할 수 있는 것"과는 성격이 다른, 반드시
+  있어야 하는 기술적 안전장치라 임시값으로 우선 구현). `main.go`의 `POST
+  /conversations/:id/messages`에서 peer-veto → 그룹 대화 차단 다음, 에스컬레이션 하드게이트
+  이전 지점에 추가 — 트윈 발송 시도 전체가 지나가는 동일 우회 불가 지점. 카운트는 대화방 내
+  `sender_id != 소유자`인 메시지(=상대가 보낸 것, 트윈 자동발송·소유자 본인 발송 모두 제외)만
+  집계. `Conversation.TwinDisabledByFlood`로 대화방 단위 영구 차단(거부권과 동일 저장 패턴) —
+  단, 거부권과 달리 **사람의 선택이 아닌 시스템의 자동 조치**라 되돌릴 수 있어야 해서(AGENTS.md
+  "every automatic action needs post-hoc notification + one-tap undo") `POST
+  /conversations/:id/flood-reset`로 재개 가능(거부권은 v1에서 되돌리기 API 없음, 의도적으로 다름)
+- [x] 중단 시 사후 알림 — 기존 `EscalationLog`/`InboxScreen` 스키마·UI 그대로 재사용(신규 알림
+  경로 없음). 대화 목록(`conversation_list_screen.dart`)에도 `twin_disabled_by_flood` 배지 추가
+  (거부권 배지와 같은 자리, 다른 아이콘). 재개(one-tap undo)는 `chat_screen.dart`의 배너에
+  "자동응대 재개" 버튼으로 노출 — 채팅방을 열면(목록에서 넘어온 초기 상태) 또는 발송 시도가
+  다시 차단되면 즉시 뜬다
+
+**2.7-D 자율성 상대별 예외** (`PRD.md` §3.1 "자율성 설정(L0~L2) | 전역 기본값 + 상대별 예외
+설정", §4 엣지케이스 "사용자가 여러 상대에게 다른 자율성 레벨을 원함" — P0인데 현재 전역
+`TwinSettings.AutonomyLevel` 하나뿐, `Contact`에 오버라이드 필드 자체가 없음, 2026-08-03 발견 —
+**완료** 2026-08-03)
+- [x] `Contact`에 `AutonomyLevel *AutonomyLevel` 오버라이드 필드 추가(`RelationshipTier`와
+  동일 패턴, nil = 전역 기본값 사용) — `core-backend/models.go`
+- [x] 자율성 레벨 해석 함수 추가(연락처 오버라이드 → 전역 기본값 → `L0`, `resolveRelationshipTier`
+  와 동일 구조) — `core-backend/autonomy_resolve.go`의 `resolveAutonomyLevel()`. 메시지
+  발송 게이트(`main.go` `POST /conversations/:id/messages`)가 `db.Where("user_id =
+  ?", req.SenderID).First(&settings)`로 전역값만 읽던 걸 이 해석 함수 호출 한 줄로 교체 —
+  peer-veto·그룹 차단·도배 감지·에스컬레이션 하드게이트는 순서 그대로 유지, "level" 계산
+  방식만 바뀜. 실패 시 폴백은 `L1`/`L2`가 아니라 `L0`(이 코드베이스 전반의 안전 우선 기본값과
+  동일한 이유 — 알 수 없으면 항상 초안만 만들고 사람이 직접 보냄)
+- [x] 연락처 추가/수정 다이얼로그에 자율성 레벨 오버라이드 UI(`contacts_screen.dart`,
+  `_RelationshipTierPicker`와 나란히 `_AutonomyLevelPicker`(기본값 사용/L0/L1/L2 4-way 칩) 추가,
+  연락처 목록 서브타이틀에도 오버라이드 표시)
+- [x] 그룹 대화는 기존과 동일하게 항상 전역 L0 취급 유지(단톡 따라잡기 안전 불변식 변경 없음) —
+  `resolveAutonomyLevel()`도 `RelationshipTier`와 동일하게 그룹 대화면 연락처 오버라이드를
+  건너뛰고 전역 기본값만 사용하도록 구현, 그룹 대화는 애초에 `main.go`의 무조건 차단이 이
+  해석 함수 호출보다 먼저 걸려서 두 안전장치가 이중으로 겹침
+
+**2.7-E 관계 메모 실제 반영** (`PRD.md` §3.2 P1, `Contact.RelationshipNote` 필드·CRUD는 이미
+있으나 `draftRequest`에 필드 자체가 없어 ai-service 프롬프트에 전혀 전달되지 않음 — 저장만 되는
+스텁, 2026-08-03 발견 — **완료** 2026-08-03)
+- [x] `core-backend/aiservice.go`의 `draftRequest`에 `RelationshipNote string` 필드 추가
+  (`relationship_tier` 옆, 빈 문자열 = 메모 없음 = ai-service 프롬프트 무영향, `omitempty`)
+- [x] `POST /conversations/:id/draft` 핸들러가 연락처의 `RelationshipNote`를 조회해 요청에 포함 —
+  `core-backend/persona.go`의 `resolveRelationshipNote()`. 티어/자율성과 달리 메모는 순전히
+  개인별이라 "전역 기본 메모" 개념 자체가 없음 — 그룹 대화(상대가 여럿)나 매칭되는 `Contact`가
+  없는 경우 그냥 빈 문자열로 귀결(관계 티어의 "전역 기본값 폴백"과 다른 지점). 이 참에
+  `resolveRelationshipTier`/`resolveAutonomyLevel`/`resolveRelationshipNote` 셋이 거의 동일한
+  "1:1 대화에서 상대방의 Contact 행 찾기" 루프를 각자 복붙하고 있던 걸 `persona.go`의
+  `findCounterpartContact(db, actorID, conversationID) (Contact, bool)` 공용 헬퍼로 추출해서
+  셋 다 이걸 호출하도록 정리(중복 제거, 그룹 판정 로직도 한 곳에만 존재)
+- [x] `ai-service/app/generation.py`가 메모가 있으면 시스템 프롬프트에 "호칭/금기어" 지침으로
+  주입(빈 문자열/`None`이면 기존과 동일하게 무영향) — `system_prompt_for_tier(relationship_tier,
+  relationship_note)`에 `"\n\n[관계 메모] {note} -- 위 내용을 참고해 호칭/금기어 등을 지켜라."`
+  형태로 추가. 관계 티어(가까운/공식적) 지침과 분리된 별도 문단이라 서로 안 섞임. `draft_reply()`도
+  `relationship_note` 파라미터를 받아 그대로 전달 — 에스컬레이션/정체성 게이팅 로직 이전 단계라
+  이 둘에는 전혀 영향 없음(순수 톤/금기어 힌트, 안전 게이트 우회 아님)
+
+**2.7-F 답장 마감 알림** (`PRD.md` §3.2 P1: "내가 '이따 답장' 누르면 나에게만 리마인드" — 코드
+전무, 아이디어 회의 문서에만 존재, 2026-08-03 발견 — **완료(부분 검증)** 2026-08-03, 아래 참고)
+- [x] 메시지/대화에 "이따 답장" 스누즈 액션 + 리마인드 시각 저장 — 순수 온디바이스
+  (`mobile/lib/db/tables.dart`의 `ConversationSnoozes` drift 테이블, 서버에는 전혀
+  전달되지 않음). `chat_screen.dart` 앱바에 "이따 답장" 아이콘 → `SimpleDialog`로
+  빠른 선택(`1시간 후`/`저녁에`/`내일`, `mobile/lib/services/snooze_service.dart`
+  `SnoozeQuickPick`) + 스누즈 해제. 기본값은 빠른 선택 없이도 쓸 수 있게 상수
+  `kDefaultSnoozeDuration`(2시간)로 노출은 해 두었지만 UI 자체는 빠른 선택 3개만
+  제공(추가 커스텀 시각 입력은 P1 범위상 생략). 사람이 실제로 답장을 보내면(휴먼
+  전송이든 트윈 승인 전송이든) 자동으로 스누즈 해제(`_clearSnoozeQuiet()`)
+- [x] 리마인드 도달 시 로컬 알림 — **`flutter_local_notifications`(+`timezone`) 실제
+  연동, 단 실기기/에뮬레이터로 발사·탭 동작까지 검증하지는 못함.** 이 샌드박스는
+  Flutter 웹 빌드와 Playwright 브라우저 자동화만 가능하고 실제 Android/iOS
+  기기·에뮬레이터가 없어 `zonedSchedule()`이 만든 예약이 실제로 울리는지는 확인할
+  수 없다 — 검증한 것은 `mobile/lib/services/snooze_controller.dart`가 스케줄러
+  인터페이스(`SnoozeNotificationScheduler`)를 목(mock)으로 바꿔 넣었을 때 올바른
+  id·시각·페이로드로 호출되는가뿐(`test/snooze_controller_test.dart`). 대신 진짜로
+  검증 가능한 **인앱 대체 노출**을 항상 함께 켜 둔다 — 앱을 열 때(대화 목록 로드,
+  채팅방 진입) 마감이 지난 스누즈는 배지/배너로 반드시 보인다(아래 항목). 웹 빌드는
+  플러그인 자체가 웹을 지원하지 않아 `snooze_notification_service_web.dart`가
+  no-op 스텁으로 대체(웹은 프리뷰 서피스일 뿐 릴리스 타깃이 아님)
+- [x] `chat_screen.dart`/`conversation_list_screen.dart`에 스누즈 표시·취소 UI —
+  채팅방은 앱바 아이콘 상태(`Icons.alarm_on`) + 마감 지난 스누즈 배너("스누즈
+  해제" 버튼), 대화 목록은 서브타이틀 아래 "답장 마감 (탭하여 해제)" 배지(탭하면
+  채팅방을 열지 않고도 바로 해제). 마감 판정은 순수 함수 `isSnoozePastDue(now,
+  snoozedUntil)`로 분리해 고정 시각으로 단위 테스트(`test/snooze_service_test.dart`)
 
 **스코프 밖 (제안 아님, 참고용)**: 이미지/파일 전송·읽음표시·타이핑 인디케이터 등 "일반 메신저"
 테이블스테이크 기능은 `PRD.md`에 명시되지 않음 — 콘텐츠 공백의 또 다른 후보일 수 있으나 이건
@@ -199,8 +293,9 @@ PoC 데이터 없이 기본값을 추측해 채우지 않는다.
      §3(사람 PoC) 이후**
    - 5-2. [x] 화이트리스트 규칙 CRUD API
 6. [x] Phase 1 C 베타 직전 — Q1~Q7 확정, 초대 운영, 프로토타입 앵커, Android 릴리즈 경로
-   - 6-1. [ ] 2.7 콘텐츠 갭 — PRD P0 대비 미구현 기능 (**우선순위: A 단톡 따라잡기 → B 관계별
-     페르소나 → C 스팸 감지**, 2026-07-31 발견). §3 사람 PoC보다 먼저 끝내야 함 — PRD가 요구하는
+   - 6-1. [x] 2.7 콘텐츠 갭 — PRD P0 대비 미구현 기능 (**우선순위: A 단톡 따라잡기 → B 관계별
+     페르소나 → C 스팸 감지**, 2026-07-31 발견 — A/B/C 모두 완료 2026-08-03). §3 사람 PoC보다
+     먼저 끝내야 함 — PRD가 요구하는
      v1 P0 범위이므로 §4 순서상 D(사람 PoC) 앞
 7. [ ] §3 사람 PoC 실행 + 확정 값 반영 → 실제 베타 오픈 (**맨 마지막 / D**)
 

mobile/lib/db/app_database_native.dart

@@ -13,9 +13,9 @@ import 'package:sqlite3/open.dart';
 
 import 'tables.dart';
 
-part 'app_database.g.dart';
+part 'app_database_native.g.dart';
 
-@DriftDatabase(tables: [ToneSamples, LocalKv])
+@DriftDatabase(tables: [ToneSamples, LocalKv, ConversationSnoozes])
 class AppDatabase extends _$AppDatabase {
   AppDatabase(super.e, {this.encrypted = false});
 
@@ -23,7 +23,18 @@ class AppDatabase extends _$AppDatabase {
   final bool encrypted;
 
   @override
-  int get schemaVersion => 1;
+  int get schemaVersion => 2;
+
+  @override
+  MigrationStrategy get migration => MigrationStrategy(
+        onCreate: (m) => m.createAll(),
+        onUpgrade: (m, from, to) async {
+          // v1 -> v2: roadmap.md §2.7-F 답장 마감 알림 스누즈 테이블 추가.
+          if (from < 2) {
+            await m.createTable(conversationSnoozes);
+          }
+        },
+      );
 
   /// In-memory DB for unit tests (no SQLCipher / filesystem).
   factory AppDatabase.memory() => AppDatabase(NativeDatabase.memory(), encrypted: false);
@@ -76,6 +87,42 @@ class AppDatabase extends _$AppDatabase {
   Future<void> setBoolKv(String key, bool value) async {
     await setKv(key, value ? '1' : '0');
   }
+
+  /// 답장 마감 알림(roadmap.md §2.7-F) — "이따 답장"으로 대화방 [conversationId]에
+  /// 스누즈를 건다. 서버에는 전혀 전달되지 않는 순수 온디바이스 상태.
+  Future<void> setSnoozedUntil(int conversationId, DateTime until) async {
+    await into(conversationSnoozes).insertOnConflictUpdate(
+      ConversationSnoozesCompanion.insert(
+        conversationId: conversationId.toString(),
+        snoozedUntilMs: until.millisecondsSinceEpoch,
+      ),
+    );
+  }
+
+  Future<DateTime?> getSnoozedUntil(int conversationId) async {
+    final row = await (select(conversationSnoozes)
+          ..where((t) => t.conversationId.equals(conversationId.toString())))
+        .getSingleOrNull();
+    if (row == null) return null;
+    // isUtc: true — millisecondsSinceEpoch는 어차피 절대 시각이라 타임존 표현과
+    // 무관하지만, UTC로 고정해야 DateTime.== 비교(테스트 포함)가 저장 전과 일관된다.
+    return DateTime.fromMillisecondsSinceEpoch(row.snoozedUntilMs, isUtc: true);
+  }
+
+  Future<void> clearSnooze(int conversationId) async {
+    await (delete(conversationSnoozes)
+          ..where((t) => t.conversationId.equals(conversationId.toString())))
+        .go();
+  }
+
+  /// 대화 목록 화면(`conversation_list_screen.dart`)에서 배지를 그리기 위한 일괄 로드.
+  Future<Map<int, DateTime>> loadAllSnoozes() async {
+    final rows = await select(conversationSnoozes).get();
+    return {
+      for (final r in rows)
+        int.parse(r.conversationId): DateTime.fromMillisecondsSinceEpoch(r.snoozedUntilMs, isUtc: true),
+    };
+  }
 }
 
 const _kDbPassphrase = 'db_passphrase_v1';

mobile/lib/db/app_database_native.g.dart

@@ -532,16 +532,256 @@ class LocalKvCompanion extends UpdateCompanion<LocalKvData> {
   }
 }
 
+class $ConversationSnoozesTable extends ConversationSnoozes
+    with TableInfo<$ConversationSnoozesTable, ConversationSnooze> {
+  @override
+  final GeneratedDatabase attachedDatabase;
+  final String? _alias;
+  $ConversationSnoozesTable(this.attachedDatabase, [this._alias]);
+  static const VerificationMeta _conversationIdMeta = const VerificationMeta(
+    'conversationId',
+  );
+  @override
+  late final GeneratedColumn<String> conversationId = GeneratedColumn<String>(
+    'conversation_id',
+    aliasedName,
+    false,
+    type: DriftSqlType.string,
+    requiredDuringInsert: true,
+  );
+  static const VerificationMeta _snoozedUntilMsMeta = const VerificationMeta(
+    'snoozedUntilMs',
+  );
+  @override
+  late final GeneratedColumn<int> snoozedUntilMs = GeneratedColumn<int>(
+    'snoozed_until_ms',
+    aliasedName,
+    false,
+    type: DriftSqlType.int,
+    requiredDuringInsert: true,
+  );
+  @override
+  List<GeneratedColumn> get $columns => [conversationId, snoozedUntilMs];
+  @override
+  String get aliasedName => _alias ?? actualTableName;
+  @override
+  String get actualTableName => $name;
+  static const String $name = 'conversation_snoozes';
+  @override
+  VerificationContext validateIntegrity(
+    Insertable<ConversationSnooze> instance, {
+    bool isInserting = false,
+  }) {
+    final context = VerificationContext();
+    final data = instance.toColumns(true);
+    if (data.containsKey('conversation_id')) {
+      context.handle(
+        _conversationIdMeta,
+        conversationId.isAcceptableOrUnknown(
+          data['conversation_id']!,
+          _conversationIdMeta,
+        ),
+      );
+    } else if (isInserting) {
+      context.missing(_conversationIdMeta);
+    }
+    if (data.containsKey('snoozed_until_ms')) {
+      context.handle(
+        _snoozedUntilMsMeta,
+        snoozedUntilMs.isAcceptableOrUnknown(
+          data['snoozed_until_ms']!,
+          _snoozedUntilMsMeta,
+        ),
+      );
+    } else if (isInserting) {
+      context.missing(_snoozedUntilMsMeta);
+    }
+    return context;
+  }
+
+  @override
+  Set<GeneratedColumn> get $primaryKey => {conversationId};
+  @override
+  ConversationSnooze map(Map<String, dynamic> data, {String? tablePrefix}) {
+    final effectivePrefix = tablePrefix != null ? '$tablePrefix.' : '';
+    return ConversationSnooze(
+      conversationId: attachedDatabase.typeMapping.read(
+        DriftSqlType.string,
+        data['${effectivePrefix}conversation_id'],
+      )!,
+      snoozedUntilMs: attachedDatabase.typeMapping.read(
+        DriftSqlType.int,
+        data['${effectivePrefix}snoozed_until_ms'],
+      )!,
+    );
+  }
+
+  @override
+  $ConversationSnoozesTable createAlias(String alias) {
+    return $ConversationSnoozesTable(attachedDatabase, alias);
+  }
+}
+
+class ConversationSnooze extends DataClass
+    implements Insertable<ConversationSnooze> {
+  /// `Conversation.id`를 문자열로 저장 (drift 기본 타입 일관성을 위해 다른 테이블과
+  /// 마찬가지로 text 기본키를 사용).
+  final String conversationId;
+  final int snoozedUntilMs;
+  const ConversationSnooze({
+    required this.conversationId,
+    required this.snoozedUntilMs,
+  });
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    map['conversation_id'] = Variable<String>(conversationId);
+    map['snoozed_until_ms'] = Variable<int>(snoozedUntilMs);
+    return map;
+  }
+
+  ConversationSnoozesCompanion toCompanion(bool nullToAbsent) {
+    return ConversationSnoozesCompanion(
+      conversationId: Value(conversationId),
+      snoozedUntilMs: Value(snoozedUntilMs),
+    );
+  }
+
+  factory ConversationSnooze.fromJson(
+    Map<String, dynamic> json, {
+    ValueSerializer? serializer,
+  }) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return ConversationSnooze(
+      conversationId: serializer.fromJson<String>(json['conversationId']),
+      snoozedUntilMs: serializer.fromJson<int>(json['snoozedUntilMs']),
+    );
+  }
+  @override
+  Map<String, dynamic> toJson({ValueSerializer? serializer}) {
+    serializer ??= driftRuntimeOptions.defaultSerializer;
+    return <String, dynamic>{
+      'conversationId': serializer.toJson<String>(conversationId),
+      'snoozedUntilMs': serializer.toJson<int>(snoozedUntilMs),
+    };
+  }
+
+  ConversationSnooze copyWith({String? conversationId, int? snoozedUntilMs}) =>
+      ConversationSnooze(
+        conversationId: conversationId ?? this.conversationId,
+        snoozedUntilMs: snoozedUntilMs ?? this.snoozedUntilMs,
+      );
+  ConversationSnooze copyWithCompanion(ConversationSnoozesCompanion data) {
+    return ConversationSnooze(
+      conversationId: data.conversationId.present
+          ? data.conversationId.value
+          : this.conversationId,
+      snoozedUntilMs: data.snoozedUntilMs.present
+          ? data.snoozedUntilMs.value
+          : this.snoozedUntilMs,
+    );
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('ConversationSnooze(')
+          ..write('conversationId: $conversationId, ')
+          ..write('snoozedUntilMs: $snoozedUntilMs')
+          ..write(')'))
+        .toString();
+  }
+
+  @override
+  int get hashCode => Object.hash(conversationId, snoozedUntilMs);
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      (other is ConversationSnooze &&
+          other.conversationId == this.conversationId &&
+          other.snoozedUntilMs == this.snoozedUntilMs);
+}
+
+class ConversationSnoozesCompanion extends UpdateCompanion<ConversationSnooze> {
+  final Value<String> conversationId;
+  final Value<int> snoozedUntilMs;
+  final Value<int> rowid;
+  const ConversationSnoozesCompanion({
+    this.conversationId = const Value.absent(),
+    this.snoozedUntilMs = const Value.absent(),
+    this.rowid = const Value.absent(),
+  });
+  ConversationSnoozesCompanion.insert({
+    required String conversationId,
+    required int snoozedUntilMs,
+    this.rowid = const Value.absent(),
+  }) : conversationId = Value(conversationId),
+       snoozedUntilMs = Value(snoozedUntilMs);
+  static Insertable<ConversationSnooze> custom({
+    Expression<String>? conversationId,
+    Expression<int>? snoozedUntilMs,
+    Expression<int>? rowid,
+  }) {
+    return RawValuesInsertable({
+      if (conversationId != null) 'conversation_id': conversationId,
+      if (snoozedUntilMs != null) 'snoozed_until_ms': snoozedUntilMs,
+      if (rowid != null) 'rowid': rowid,
+    });
+  }
+
+  ConversationSnoozesCompanion copyWith({
+    Value<String>? conversationId,
+    Value<int>? snoozedUntilMs,
+    Value<int>? rowid,
+  }) {
+    return ConversationSnoozesCompanion(
+      conversationId: conversationId ?? this.conversationId,
+      snoozedUntilMs: snoozedUntilMs ?? this.snoozedUntilMs,
+      rowid: rowid ?? this.rowid,
+    );
+  }
+
+  @override
+  Map<String, Expression> toColumns(bool nullToAbsent) {
+    final map = <String, Expression>{};
+    if (conversationId.present) {
+      map['conversation_id'] = Variable<String>(conversationId.value);
+    }
+    if (snoozedUntilMs.present) {
+      map['snoozed_until_ms'] = Variable<int>(snoozedUntilMs.value);
+    }
+    if (rowid.present) {
+      map['rowid'] = Variable<int>(rowid.value);
+    }
+    return map;
+  }
+
+  @override
+  String toString() {
+    return (StringBuffer('ConversationSnoozesCompanion(')
+          ..write('conversationId: $conversationId, ')
+          ..write('snoozedUntilMs: $snoozedUntilMs, ')
+          ..write('rowid: $rowid')
+          ..write(')'))
+        .toString();
+  }
+}
+
 abstract class _$AppDatabase extends GeneratedDatabase {
   _$AppDatabase(QueryExecutor e) : super(e);
   $AppDatabaseManager get managers => $AppDatabaseManager(this);
   late final $ToneSamplesTable toneSamples = $ToneSamplesTable(this);
   late final $LocalKvTable localKv = $LocalKvTable(this);
+  late final $ConversationSnoozesTable conversationSnoozes =
+      $ConversationSnoozesTable(this);
   @override
   Iterable<TableInfo<Table, Object?>> get allTables =>
       allSchemaEntities.whereType<TableInfo<Table, Object?>>();
   @override
-  List<DatabaseSchemaEntity> get allSchemaEntities => [toneSamples, localKv];
+  List<DatabaseSchemaEntity> get allSchemaEntities => [
+    toneSamples,
+    localKv,
+    conversationSnoozes,
+  ];
 }
 
 typedef $$ToneSamplesTableCreateCompanionBuilder =
@@ -862,6 +1102,169 @@ typedef $$LocalKvTableProcessedTableManager =
       LocalKvData,
       PrefetchHooks Function()
     >;
+typedef $$ConversationSnoozesTableCreateCompanionBuilder =
+    ConversationSnoozesCompanion Function({
+      required String conversationId,
+      required int snoozedUntilMs,
+      Value<int> rowid,
+    });
+typedef $$ConversationSnoozesTableUpdateCompanionBuilder =
+    ConversationSnoozesCompanion Function({
+      Value<String> conversationId,
+      Value<int> snoozedUntilMs,
+      Value<int> rowid,
+    });
+
+class $$ConversationSnoozesTableFilterComposer
+    extends Composer<_$AppDatabase, $ConversationSnoozesTable> {
+  $$ConversationSnoozesTableFilterComposer({
+    required super.$db,
+    required super.$table,
+    super.joinBuilder,
+    super.$addJoinBuilderToRootComposer,
+    super.$removeJoinBuilderFromRootComposer,
+  });
+  ColumnFilters<String> get conversationId => $composableBuilder(
+    column: $table.conversationId,
+    builder: (column) => ColumnFilters(column),
+  );
+
+  ColumnFilters<int> get snoozedUntilMs => $composableBuilder(
+    column: $table.snoozedUntilMs,
+    builder: (column) => ColumnFilters(column),
+  );
+}
+
+class $$ConversationSnoozesTableOrderingComposer
+    extends Composer<_$AppDatabase, $ConversationSnoozesTable> {
+  $$ConversationSnoozesTableOrderingComposer({
+    required super.$db,
+    required super.$table,
+    super.joinBuilder,
+    super.$addJoinBuilderToRootComposer,
+    super.$removeJoinBuilderFromRootComposer,
+  });
+  ColumnOrderings<String> get conversationId => $composableBuilder(
+    column: $table.conversationId,
+    builder: (column) => ColumnOrderings(column),
+  );
+
+  ColumnOrderings<int> get snoozedUntilMs => $composableBuilder(
+    column: $table.snoozedUntilMs,
+    builder: (column) => ColumnOrderings(column),
+  );
+}
+
+class $$ConversationSnoozesTableAnnotationComposer
+    extends Composer<_$AppDatabase, $ConversationSnoozesTable> {
+  $$ConversationSnoozesTableAnnotationComposer({
+    required super.$db,
+    required super.$table,
+    super.joinBuilder,
+    super.$addJoinBuilderToRootComposer,
+    super.$removeJoinBuilderFromRootComposer,
+  });
+  GeneratedColumn<String> get conversationId => $composableBuilder(
+    column: $table.conversationId,
+    builder: (column) => column,
+  );
+
+  GeneratedColumn<int> get snoozedUntilMs => $composableBuilder(
+    column: $table.snoozedUntilMs,
+    builder: (column) => column,
+  );
+}
+
+class $$ConversationSnoozesTableTableManager
+    extends
+        RootTableManager<
+          _$AppDatabase,
+          $ConversationSnoozesTable,
+          ConversationSnooze,
+          $$ConversationSnoozesTableFilterComposer,
+          $$ConversationSnoozesTableOrderingComposer,
+          $$ConversationSnoozesTableAnnotationComposer,
+          $$ConversationSnoozesTableCreateCompanionBuilder,
+          $$ConversationSnoozesTableUpdateCompanionBuilder,
+          (
+            ConversationSnooze,
+            BaseReferences<
+              _$AppDatabase,
+              $ConversationSnoozesTable,
+              ConversationSnooze
+            >,
+          ),
+          ConversationSnooze,
+          PrefetchHooks Function()
+        > {
+  $$ConversationSnoozesTableTableManager(
+    _$AppDatabase db,
+    $ConversationSnoozesTable table,
+  ) : super(
+        TableManagerState(
+          db: db,
+          table: table,
+          createFilteringComposer: () =>
+              $$ConversationSnoozesTableFilterComposer($db: db, $table: table),
+          createOrderingComposer: () =>
+              $$ConversationSnoozesTableOrderingComposer(
+                $db: db,
+                $table: table,
+              ),
+          createComputedFieldComposer: () =>
+              $$ConversationSnoozesTableAnnotationComposer(
+                $db: db,
+                $table: table,
+              ),
+          updateCompanionCallback:
+              ({
+                Value<String> conversationId = const Value.absent(),
+                Value<int> snoozedUntilMs = const Value.absent(),
+                Value<int> rowid = const Value.absent(),
+              }) => ConversationSnoozesCompanion(
+                conversationId: conversationId,
+                snoozedUntilMs: snoozedUntilMs,
+                rowid: rowid,
+              ),
+          createCompanionCallback:
+              ({
+                required String conversationId,
+                required int snoozedUntilMs,
+                Value<int> rowid = const Value.absent(),
+              }) => ConversationSnoozesCompanion.insert(
+                conversationId: conversationId,
+                snoozedUntilMs: snoozedUntilMs,
+                rowid: rowid,
+              ),
+          withReferenceMapper: (p0) => p0
+              .map((e) => (e.readTable(table), BaseReferences(db, table, e)))
+              .toList(),
+          prefetchHooksCallback: null,
+        ),
+      );
+}
+
+typedef $$ConversationSnoozesTableProcessedTableManager =
+    ProcessedTableManager<
+      _$AppDatabase,
+      $ConversationSnoozesTable,
+      ConversationSnooze,
+      $$ConversationSnoozesTableFilterComposer,
+      $$ConversationSnoozesTableOrderingComposer,
+      $$ConversationSnoozesTableAnnotationComposer,
+      $$ConversationSnoozesTableCreateCompanionBuilder,
+      $$ConversationSnoozesTableUpdateCompanionBuilder,
+      (
+        ConversationSnooze,
+        BaseReferences<
+          _$AppDatabase,
+          $ConversationSnoozesTable,
+          ConversationSnooze
+        >,
+      ),
+      ConversationSnooze,
+      PrefetchHooks Function()
+    >;
 
 class $AppDatabaseManager {
   final _$AppDatabase _db;
@@ -870,4 +1273,6 @@ class $AppDatabaseManager {
       $$ToneSamplesTableTableManager(_db, _db.toneSamples);
   $$LocalKvTableTableManager get localKv =>
       $$LocalKvTableTableManager(_db, _db.localKv);
+  $$ConversationSnoozesTableTableManager get conversationSnoozes =>
+      $$ConversationSnoozesTableTableManager(_db, _db.conversationSnoozes);
 }

mobile/lib/db/app_database_web.dart

@@ -11,6 +11,7 @@ class AppDatabase {
 
   final Map<String, String> _kv = {};
   List<String> _toneSamples = [];
+  final Map<int, DateTime> _snoozes = {};
 
   factory AppDatabase.memory() => AppDatabase(encrypted: false);
 
@@ -38,5 +39,19 @@ class AppDatabase {
     await setKv(key, value ? '1' : '0');
   }
 
+  // roadmap.md §2.7-F 답장 마감 알림 — native stub과 동일한 시그니처
+  // (in-memory, encrypted persistence 없음 — web은 프리뷰 서피스일 뿐 릴리스 타깃이 아님).
+  Future<void> setSnoozedUntil(int conversationId, DateTime until) async {
+    _snoozes[conversationId] = until;
+  }
+
+  Future<DateTime?> getSnoozedUntil(int conversationId) async => _snoozes[conversationId];
+
+  Future<void> clearSnooze(int conversationId) async {
+    _snoozes.remove(conversationId);
+  }
+
+  Future<Map<int, DateTime>> loadAllSnoozes() async => Map<int, DateTime>.from(_snoozes);
+
   Future<void> close() async {}
 }

mobile/lib/db/tables.dart

@@ -19,3 +19,16 @@ class LocalKv extends Table {
   @override
   Set<Column<Object>> get primaryKey => {key};
 }
+
+/// 답장 마감 알림(roadmap.md §2.7-F) — 대화방별 "이따 답장" 스누즈 시각. 다른 사람에게는
+/// 절대 보이지 않고 서버에도 올라가지 않는 순수 온디바이스 상태(개인 전용 리마인드,
+/// AGENTS.md "Tone/style learning: on-device first" 원칙과 동일한 이유).
+class ConversationSnoozes extends Table {
+  /// `Conversation.id`를 문자열로 저장 (drift 기본 타입 일관성을 위해 다른 테이블과
+  /// 마찬가지로 text 기본키를 사용).
+  TextColumn get conversationId => text()();
+  IntColumn get snoozedUntilMs => integer()();
+
+  @override
+  Set<Column<Object>> get primaryKey => {conversationId};
+}

mobile/lib/models/models.dart

@@ -4,6 +4,26 @@ enum SenderMode { human, twin }
 // ignore: constant_identifier_names
 enum AutonomyLevel { L0, L1, L2 }
 
+extension AutonomyLevelLabel on AutonomyLevel {
+  /// Short label reused verbatim from autonomy_settings_screen.dart's
+  /// segmented-button labels ("L0"/"L1"/"L2") so per-contact chips
+  /// (roadmap.md §2.7-D) don't invent new copy.
+  String get label => name;
+}
+
+/// 관계별 페르소나 (roadmap.md §2.7-B, PRD.md §2.1-②/§3.1) — minimum 2 tiers.
+enum RelationshipTier {
+  close,
+  formal;
+
+  static RelationshipTier fromJson(String? raw) => RelationshipTier.values.firstWhere(
+        (e) => e.name == raw,
+        orElse: () => RelationshipTier.formal,
+      );
+
+  String get label => this == RelationshipTier.close ? '가까운 사이' : '공식적인 사이';
+}
+
 class User {
   User({required this.id, required this.displayName, required this.inviteCode});
 
@@ -19,9 +39,10 @@ class User {
 }
 
 class TwinSettings {
-  TwinSettings({required this.autonomyLevel});
+  TwinSettings({required this.autonomyLevel, required this.relationshipTier});
 
   final AutonomyLevel autonomyLevel;
+  final RelationshipTier relationshipTier;
 
   factory TwinSettings.fromJson(Map<String, dynamic> json) {
     final raw = (json['autonomy_level'] as String? ?? 'L0').toUpperCase();
@@ -30,6 +51,7 @@ class TwinSettings {
         (e) => e.name == raw,
         orElse: () => AutonomyLevel.L0,
       ),
+      relationshipTier: RelationshipTier.fromJson(json['relationship_tier'] as String?),
     );
   }
 }
@@ -40,6 +62,7 @@ class ConversationSummary {
     required this.isGroup,
     required this.userIds,
     required this.twinDisabledByPeer,
+    this.twinDisabledByFlood = false,
     this.unreadCount = 0,
     this.createdAt,
   });
@@ -48,6 +71,9 @@ class ConversationSummary {
   final bool isGroup;
   final List<int> userIds;
   final bool twinDisabledByPeer;
+  // roadmap.md §2.7-C 스팸/도배 감지: 자동으로 켜지지만(사람의 선택이 아님)
+  // twinDisabledByPeer와 달리 되돌릴 수 있음 (POST /conversations/:id/flood-reset).
+  final bool twinDisabledByFlood;
   final int unreadCount;
   final DateTime? createdAt;
 
@@ -58,6 +84,7 @@ class ConversationSummary {
       isGroup: json['is_group'] as bool? ?? false,
       userIds: rawIds.map((e) => e as int).toList(),
       twinDisabledByPeer: json['twin_disabled_by_peer'] as bool? ?? false,
+      twinDisabledByFlood: json['twin_disabled_by_flood'] as bool? ?? false,
       unreadCount: json['unread_count'] as int? ?? 0,
       createdAt: DateTime.tryParse(json['created_at'] as String? ?? ''),
     );
@@ -78,18 +105,36 @@ class Contact {
     required this.displayName,
     this.contactUserId,
     this.relationshipNote = '',
+    this.relationshipTier,
+    this.autonomyLevel,
   });
 
   final int id;
   final String displayName;
   final int? contactUserId;
   final String relationshipNote;
+  /// Per-contact override of the global relationship tier (roadmap.md
+  /// §2.7-B). Null means "use the global default".
+  final RelationshipTier? relationshipTier;
+  /// Per-contact override of the global autonomy level (roadmap.md §2.7-D,
+  /// PRD.md §3.1 "전역 기본값 + 상대별 예외 설정"). Null means "use the
+  /// global default".
+  final AutonomyLevel? autonomyLevel;
 
   factory Contact.fromJson(Map<String, dynamic> json) => Contact(
         id: json['id'] as int,
         displayName: json['display_name'] as String? ?? '',
         contactUserId: json['contact_user_id'] as int?,
         relationshipNote: json['relationship_note'] as String? ?? '',
+        relationshipTier: json['relationship_tier'] == null
+            ? null
+            : RelationshipTier.fromJson(json['relationship_tier'] as String?),
+        autonomyLevel: json['autonomy_level'] == null
+            ? null
+            : AutonomyLevel.values.firstWhere(
+                (e) => e.name == json['autonomy_level'] as String?,
+                orElse: () => AutonomyLevel.L0,
+              ),
       );
 }
 

mobile/lib/screens/autonomy_settings_screen.dart

@@ -129,6 +129,21 @@ class _AutonomySettingsScreenState extends State<AutonomySettingsScreen> {
             ),
           ),
           const SizedBox(height: 28),
+          Text('기본 관계 설정', style: theme.textTheme.titleMedium),
+          const SizedBox(height: 6),
+          Text(
+            '연락처별로 다르게 설정하지 않은 상대에게는 이 기본값이 적용됩니다.',
+            style: theme.textTheme.bodySmall?.copyWith(color: theme.colorScheme.onSurfaceVariant),
+          ),
+          const SizedBox(height: 12),
+          SegmentedButton<RelationshipTier>(
+            segments: RelationshipTier.values
+                .map((t) => ButtonSegment(value: t, label: Text(t.label)))
+                .toList(),
+            selected: {session.relationshipTier},
+            onSelectionChanged: (s) => session.setRelationshipTier(s.first),
+          ),
+          const SizedBox(height: 28),
           Text('L2 화이트리스트 주제', style: theme.textTheme.titleMedium),
           const SizedBox(height: 12),
           Row(

mobile/lib/screens/chat_screen.dart

@@ -5,17 +5,28 @@ import 'package:provider/provider.dart';
 
 import '../models/models.dart';
 import '../services/api_client.dart';
+import '../services/snooze_service.dart';
 import '../services/ws_client.dart';
 import '../state/session_state.dart';
 import '../theme/app_theme.dart';
 import '../widgets/message_bubble.dart';
 
 class ChatScreen extends StatefulWidget {
-  const ChatScreen({super.key, required this.conversationId, this.title, this.isGroup = false});
+  const ChatScreen({
+    super.key,
+    required this.conversationId,
+    this.title,
+    this.isGroup = false,
+    this.twinDisabledByFlood = false,
+  });
 
   final int conversationId;
   final String? title;
   final bool isGroup;
+  // roadmap.md §2.7-C 도배 감지: 목록 화면이 이미 알고 있는 초기 상태를 넘겨
+  // 받아, 채팅방을 열자마자 (실패한 발송을 기다리지 않고) 배너 + 재개 버튼을
+  // 보여줄 수 있게 한다.
+  final bool twinDisabledByFlood;
 
   @override
   State<ChatScreen> createState() => _ChatScreenState();
@@ -32,15 +43,102 @@ class _ChatScreenState extends State<ChatScreen> {
   DraftResult? _pendingDraft;
   bool _busy = false;
   bool _loadingHistory = true;
+  late bool _floodBlocked;
   late final ApiClient _api;
+  // 답장 마감 알림(roadmap.md §2.7-F) — 이 대화방에 걸린 "이따 답장" 스누즈 시각.
+  // 서버에는 존재하지 않는 순수 온디바이스 상태라 화면에 들어올 때 로컬 DB에서 로드한다.
+  DateTime? _snoozedUntil;
 
   @override
   void initState() {
     super.initState();
     _api = context.read<SessionState>().api;
+    _floodBlocked = widget.twinDisabledByFlood;
+    if (_floodBlocked) {
+      _banner = '도배 감지로 이 대화방의 와카뷰 자동응대가 일시중단되었습니다.';
+    }
     _socket = ConversationSocket(widget.conversationId)..connect();
     _sub = _socket!.events.listen(_onEvent);
     _loadHistory();
+    _loadSnooze();
+  }
+
+  Future<void> _loadSnooze() async {
+    final controller = context.read<SessionState>().snoozeController;
+    if (controller == null) return;
+    final until = await controller.loadSnoozedUntil(widget.conversationId);
+    if (!mounted) return;
+    setState(() => _snoozedUntil = until);
+  }
+
+  bool get _snoozePastDue => isSnoozePastDue(DateTime.now(), _snoozedUntil);
+
+  String _formatSnoozeUntil(DateTime dt) =>
+      '${dt.month}/${dt.day} ${dt.hour.toString().padLeft(2, '0')}:${dt.minute.toString().padLeft(2, '0')}';
+
+  /// "이따 답장" 빠른 선택 메뉴 (roadmap.md §2.7-F). 스누즈가 걸려 있으면 해제
+  /// 옵션도 함께 보여준다.
+  Future<void> _openSnoozeMenu() async {
+    final now = DateTime.now();
+    final choice = await showDialog<Object>(
+      context: context,
+      builder: (ctx) => SimpleDialog(
+        title: const Text('이따 답장'),
+        children: [
+          for (final pick in SnoozeQuickPick.values)
+            SimpleDialogOption(
+              onPressed: () => Navigator.pop(ctx, pick),
+              child: Text(pick.label),
+            ),
+          if (_snoozedUntil != null)
+            SimpleDialogOption(
+              onPressed: () => Navigator.pop(ctx, 'clear'),
+              child: Text('스누즈 해제', style: TextStyle(color: Theme.of(ctx).colorScheme.error)),
+            ),
+        ],
+      ),
+    );
+    if (choice == null || !mounted) return;
+    if (choice == 'clear') {
+      await _clearSnooze();
+      return;
+    }
+    if (choice is SnoozeQuickPick) {
+      await _applySnooze(resolveSnoozeQuickPick(choice, now));
+    }
+  }
+
+  Future<void> _applySnooze(DateTime until) async {
+    final controller = context.read<SessionState>().snoozeController;
+    if (controller != null) {
+      await controller.applySnooze(
+        conversationId: widget.conversationId,
+        until: until,
+        title: '답장 마감',
+        body: '${widget.title ?? "대화방 #${widget.conversationId}"}에 답장할 시간이에요',
+      );
+    }
+    if (!mounted) return;
+    setState(() {
+      _snoozedUntil = until;
+      _banner = '이따 답장: ${_formatSnoozeUntil(until)}에 리마인드합니다 (본인에게만 표시).';
+    });
+  }
+
+  /// 사용자가 직접 "스누즈 해제"를 눌렀을 때 — 배너로 알려 준다.
+  Future<void> _clearSnooze() async {
+    await _clearSnoozeQuiet();
+    if (!mounted) return;
+    setState(() => _banner = '스누즈를 해제했습니다.');
+  }
+
+  /// 답장을 실제로 보내서 스누즈가 자동으로 풀릴 때 — 조용히 처리(배너로 덮어쓰지 않음).
+  Future<void> _clearSnoozeQuiet() async {
+    if (_snoozedUntil == null) return;
+    final controller = context.read<SessionState>().snoozeController;
+    if (controller != null) await controller.clearSnooze(widget.conversationId);
+    if (!mounted) return;
+    setState(() => _snoozedUntil = null);
   }
 
   Future<void> _loadHistory() async {
@@ -149,6 +247,8 @@ class _ChatScreenState extends State<ChatScreen> {
         setState(() => _messages.add(msg));
       }
       _scrollToEnd();
+      // roadmap.md §2.7-F: 답장을 실제로 보냈으니 걸려 있던 스누즈는 자동 해제.
+      _clearSnoozeQuiet();
     } on ApiException catch (e) {
       setState(() => _banner = '전송 실패 (${e.statusCode})');
     } finally {
@@ -230,13 +330,42 @@ class _ChatScreenState extends State<ChatScreen> {
         if (!_messages.any((m) => m.id == msg.id)) _messages.add(msg);
       });
       _scrollToEnd();
+      // roadmap.md §2.7-F: 와카뷰가 대신 답장을 보냈어도 답장은 답장이므로 스누즈 해제.
+      _clearSnoozeQuiet();
     } on ApiException catch (e) {
-      setState(() => _banner = '와카뷰 발송 차단 (${e.statusCode}): ${e.body}');
+      setState(() {
+        _banner = '와카뷰 발송 차단 (${e.statusCode}): ${e.body}';
+        // roadmap.md §2.7-C: 이 화면을 열어둔 채로 있다가 도배 임계치를
+        // 새로 넘긴 경우, 목록에서 넘겨받은 초기 상태와 무관하게 지금
+        // 바로 재개 버튼을 보여줘야 한다.
+        if (e.body.contains('도배')) _floodBlocked = true;
+      });
     } finally {
       setState(() => _busy = false);
     }
   }
 
+  /// 도배 감지로 자동 중단된 자동응대를 다시 켠다 (roadmap.md §2.7-C,
+  /// AGENTS.md "every automatic action needs post-hoc notification +
+  /// one-tap undo"). 거부권(veto)과 달리 이 중단은 시스템이 자동으로 취한
+  /// 조치라서 되돌리기 경로가 있어야 한다.
+  Future<void> _resumeFlood() async {
+    final session = context.read<SessionState>();
+    setState(() => _busy = true);
+    try {
+      await session.api.resetFlood(widget.conversationId);
+      if (!mounted) return;
+      setState(() {
+        _floodBlocked = false;
+        _banner = '와카뷰 자동응대를 다시 켰습니다.';
+      });
+    } on ApiException catch (e) {
+      setState(() => _banner = '재개 실패 (${e.statusCode})');
+    } finally {
+      if (mounted) setState(() => _busy = false);
+    }
+  }
+
   void _rejectDraft() {
     setState(() {
       _pendingDraft = null;
@@ -449,6 +578,13 @@ class _ChatScreenState extends State<ChatScreen> {
               onPressed: _openSummary,
               icon: const Icon(Icons.summarize_outlined),
             ),
+          IconButton(
+            // 답장 마감 알림(roadmap.md §2.7-F) — "이따 답장" 스누즈. 본인에게만
+            // 보이는 순수 온디바이스 상태라 상대방 화면에는 전혀 나타나지 않는다.
+            tooltip: _snoozedUntil != null ? '이따 답장 (${_formatSnoozeUntil(_snoozedUntil!)})' : '이따 답장',
+            onPressed: _busy ? null : _openSnoozeMenu,
+            icon: Icon(_snoozedUntil != null ? Icons.alarm_on : Icons.alarm_add_outlined),
+          ),
           IconButton(
             tooltip: '거부권 (와카뷰 자동응대 중단)',
             onPressed: _busy ? null : _veto,
@@ -463,9 +599,21 @@ class _ChatScreenState extends State<ChatScreen> {
               leading: Icon(Icons.info_outline, color: theme.colorScheme.onSurfaceVariant),
               content: Text(_banner!),
               actions: [
+                // 도배 감지 자동중단의 one-tap undo (AGENTS.md 안전 불변식) —
+                // 거부권과 달리 되돌릴 수 있으므로 여기서 바로 재개 가능.
+                if (_floodBlocked)
+                  TextButton(onPressed: _busy ? null : _resumeFlood, child: const Text('자동응대 재개')),
                 TextButton(onPressed: () => setState(() => _banner = null), child: const Text('닫기')),
               ],
             ),
+          if (_snoozePastDue)
+            MaterialBanner(
+              leading: Icon(Icons.alarm, color: theme.colorScheme.tertiary),
+              content: Text('답장 마감 시간이 지났습니다 (${_formatSnoozeUntil(_snoozedUntil!)}).'),
+              actions: [
+                TextButton(onPressed: _busy ? null : _clearSnooze, child: const Text('스누즈 해제')),
+              ],
+            ),
           Expanded(
             child: _loadingHistory
                 ? const Center(child: CircularProgressIndicator())

mobile/lib/screens/contacts_screen.dart

@@ -48,9 +48,12 @@ class _ContactsScreenState extends State<ContactsScreen> {
     final noteCtrl = TextEditingController();
     final session = context.read<SessionState>();
     final myId = session.user?.id;
+    RelationshipTier? tierOverride;
+    AutonomyLevel? autonomyOverride;
     final ok = await showDialog<bool>(
       context: context,
-      builder: (ctx) => AlertDialog(
+      builder: (ctx) => StatefulBuilder(
+        builder: (ctx, setDialogState) => AlertDialog(
           title: const Text('연락처 추가'),
           content: SingleChildScrollView(
             child: Column(
@@ -82,6 +85,20 @@ class _ContactsScreenState extends State<ContactsScreen> {
                   controller: noteCtrl,
                   decoration: const InputDecoration(labelText: '관계 메모 (선택)'),
                 ),
+                const SizedBox(height: 12),
+                Text('이 상대와의 관계 (roadmap.md §2.7-B)', style: Theme.of(ctx).textTheme.bodySmall),
+                const SizedBox(height: 6),
+                _RelationshipTierPicker(
+                  value: tierOverride,
+                  onChanged: (t) => setDialogState(() => tierOverride = t),
+                ),
+                const SizedBox(height: 12),
+                Text('이 상대에 대한 자율성 (roadmap.md §2.7-D)', style: Theme.of(ctx).textTheme.bodySmall),
+                const SizedBox(height: 6),
+                _AutonomyLevelPicker(
+                  value: autonomyOverride,
+                  onChanged: (l) => setDialogState(() => autonomyOverride = l),
+                ),
               ],
             ),
           ),
@@ -90,6 +107,7 @@ class _ContactsScreenState extends State<ContactsScreen> {
             FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('추가')),
           ],
         ),
+      ),
     );
     if (ok != true || !mounted) return;
     final name = nameCtrl.text.trim();
@@ -109,6 +127,8 @@ class _ContactsScreenState extends State<ContactsScreen> {
         displayName: name,
         contactUserId: peer,
         relationshipNote: noteCtrl.text.trim(),
+        relationshipTier: tierOverride,
+        autonomyLevel: autonomyOverride,
       );
       setState(() {
         _contacts = [..._contacts, created];
@@ -149,9 +169,14 @@ class _ContactsScreenState extends State<ContactsScreen> {
     );
     final noteCtrl = TextEditingController(text: contact.relationshipNote);
     final session = context.read<SessionState>();
+    // PATCH는 전체 교체라 매번 이 값을 그대로 다시 보낸다 — 안 보내면(=이전
+    // 코드처럼 필드 자체를 안 넣으면) 서버가 기존 오버라이드를 null로 되돌림.
+    RelationshipTier? tierOverride = contact.relationshipTier;
+    AutonomyLevel? autonomyOverride = contact.autonomyLevel;
     final ok = await showDialog<bool>(
       context: context,
-      builder: (ctx) => AlertDialog(
+      builder: (ctx) => StatefulBuilder(
+        builder: (ctx, setDialogState) => AlertDialog(
           title: Text(contact.contactUserId == null ? '사용자 ID 입력' : '연락처 수정'),
           content: SingleChildScrollView(
             child: Column(
@@ -184,6 +209,20 @@ class _ContactsScreenState extends State<ContactsScreen> {
                   controller: noteCtrl,
                   decoration: const InputDecoration(labelText: '관계 메모 (선택)'),
                 ),
+                const SizedBox(height: 12),
+                Text('이 상대와의 관계 (roadmap.md §2.7-B)', style: Theme.of(ctx).textTheme.bodySmall),
+                const SizedBox(height: 6),
+                _RelationshipTierPicker(
+                  value: tierOverride,
+                  onChanged: (t) => setDialogState(() => tierOverride = t),
+                ),
+                const SizedBox(height: 12),
+                Text('이 상대에 대한 자율성 (roadmap.md §2.7-D)', style: Theme.of(ctx).textTheme.bodySmall),
+                const SizedBox(height: 6),
+                _AutonomyLevelPicker(
+                  value: autonomyOverride,
+                  onChanged: (l) => setDialogState(() => autonomyOverride = l),
+                ),
               ],
             ),
           ),
@@ -192,6 +231,7 @@ class _ContactsScreenState extends State<ContactsScreen> {
             FilledButton(onPressed: () => Navigator.pop(ctx, true), child: const Text('저장')),
           ],
         ),
+      ),
     );
     if (ok != true || !mounted || session.user == null) return;
     final name = nameCtrl.text.trim();
@@ -212,6 +252,8 @@ class _ContactsScreenState extends State<ContactsScreen> {
         displayName: name,
         contactUserId: peer,
         relationshipNote: noteCtrl.text.trim(),
+        relationshipTier: tierOverride,
+        autonomyLevel: autonomyOverride,
       );
       setState(() {
         _contacts = _contacts.map((c) => c.id == updated.id ? updated : c).toList();
@@ -333,6 +375,8 @@ class _ContactsScreenState extends State<ContactsScreen> {
                             ? '사용자 ID 없음 — 대화 불가 (다시 추가 필요)'
                             : [
                                 '사용자 #${c.contactUserId}',
+                                if (c.relationshipTier != null) c.relationshipTier!.label,
+                                if (c.autonomyLevel != null) c.autonomyLevel!.label,
                                 if (c.relationshipNote.isNotEmpty) c.relationshipNote,
                               ].join(' · '),
                         style: theme.textTheme.bodySmall?.copyWith(
@@ -381,3 +425,62 @@ class _ContactsScreenState extends State<ContactsScreen> {
     );
   }
 }
+
+/// Per-contact override of the global relationship tier (roadmap.md
+/// §2.7-B). `value: null` means "use the global default set in onboarding".
+class _RelationshipTierPicker extends StatelessWidget {
+  const _RelationshipTierPicker({required this.value, required this.onChanged});
+
+  final RelationshipTier? value;
+  final ValueChanged<RelationshipTier?> onChanged;
+
+  @override
+  Widget build(BuildContext context) {
+    return Wrap(
+      spacing: 8,
+      children: [
+        ChoiceChip(
+          label: const Text('기본값 사용'),
+          selected: value == null,
+          onSelected: (_) => onChanged(null),
+        ),
+        for (final tier in RelationshipTier.values)
+          ChoiceChip(
+            label: Text(tier.label),
+            selected: value == tier,
+            onSelected: (_) => onChanged(tier),
+          ),
+      ],
+    );
+  }
+}
+
+/// Per-contact override of the global autonomy level (roadmap.md §2.7-D).
+/// `value: null` means "use the global default set in 자율성 설정".
+/// Mirrors _RelationshipTierPicker's structure exactly.
+class _AutonomyLevelPicker extends StatelessWidget {
+  const _AutonomyLevelPicker({required this.value, required this.onChanged});
+
+  final AutonomyLevel? value;
+  final ValueChanged<AutonomyLevel?> onChanged;
+
+  @override
+  Widget build(BuildContext context) {
+    return Wrap(
+      spacing: 8,
+      children: [
+        ChoiceChip(
+          label: const Text('기본값 사용'),
+          selected: value == null,
+          onSelected: (_) => onChanged(null),
+        ),
+        for (final level in AutonomyLevel.values)
+          ChoiceChip(
+            label: Text(level.label),
+            selected: value == level,
+            onSelected: (_) => onChanged(level),
+          ),
+      ],
+    );
+  }
+}

mobile/lib/screens/conversation_list_screen.dart

@@ -3,6 +3,7 @@ import 'package:provider/provider.dart';
 
 import '../models/models.dart';
 import '../services/api_client.dart';
+import '../services/snooze_service.dart';
 import '../state/session_state.dart';
 import '../widgets/gradient_text.dart';
 import '../widgets/my_user_id_chip.dart';
@@ -22,6 +23,9 @@ class ConversationListScreen extends StatefulWidget {
 class _ConversationListScreenState extends State<ConversationListScreen> {
   List<ConversationSummary> _rooms = [];
   Map<int, String> _peerNames = {};
+  // 답장 마감 알림(roadmap.md §2.7-F) — 대화방 id별 "이따 답장" 스누즈 마감 시각.
+  // 서버 응답(ConversationSummary)에는 없는 순수 온디바이스 상태라 로컬 DB에서 별도 로드.
+  Map<int, DateTime> _snoozes = {};
   bool _loading = true;
   String? _error;
 
@@ -53,9 +57,11 @@ class _ConversationListScreenState extends State<ConversationListScreen> {
           // Names are optional enrichment.
         }
       }
+      final snoozes = await session.snoozeController?.loadAllSnoozes() ?? <int, DateTime>{};
       setState(() {
         _rooms = list;
         _peerNames = names;
+        _snoozes = snoozes;
       });
     } on ApiException catch (e) {
       setState(() => _error = '대화 목록 실패 (${e.statusCode}): ${e.body}');
@@ -64,6 +70,15 @@ class _ConversationListScreenState extends State<ConversationListScreen> {
     }
   }
 
+  /// 대화 목록에서 바로 스누즈를 해제한다(roadmap.md §2.7-F — 채팅방을 열지 않고도
+  /// "마감 지남" 배지를 지울 수 있게).
+  Future<void> _clearSnoozeFromList(int conversationId) async {
+    final controller = context.read<SessionState>().snoozeController;
+    if (controller != null) await controller.clearSnooze(conversationId);
+    if (!mounted) return;
+    setState(() => _snoozes.remove(conversationId));
+  }
+
   String _titleFor(ConversationSummary room, int? me) {
     if (me == null) return '대화방 #${room.id}';
     final peers = room.userIds.where((id) => id != me).toList();
@@ -77,6 +92,9 @@ class _ConversationListScreenState extends State<ConversationListScreen> {
 
   String _subtitleFor(ConversationSummary room, int? me) {
     if (room.twinDisabledByPeer) return '상대가 와카뷰를 거부함';
+    // roadmap.md §2.7-C 도배 감지 — 사후 알림 함(InboxScreen)에서도 보이지만
+    // 대화 목록에서 바로 상태를 알 수 있어야 한다.
+    if (room.twinDisabledByFlood) return '도배 감지로 자동응대 일시중단 (사후 알림에서 재개)';
     final peers = me == null ? const <int>[] : room.userIds.where((id) => id != me).toList();
     final peerPart = peers.isEmpty ? '참가자 없음' : '상대 ID ${peers.first}';
     return '$peerPart · 방 #${room.id}';
@@ -332,9 +350,19 @@ class _ConversationListScreenState extends State<ConversationListScreen> {
                       ),
                     ),
                   for (final room in _rooms)
-                    Material(
-                      color: Colors.transparent,
-                      child: InkWell(
+                    Builder(
+                      builder: (context) {
+                        final snoozedUntil = _snoozes[room.id];
+                        final snoozePastDue = isSnoozePastDue(DateTime.now(), snoozedUntil);
+                        return _ConversationRow(
+                          room: room,
+                          me: me,
+                          title: _titleFor(room, me),
+                          subtitle: _subtitleFor(room, me),
+                          avatarColor: _avatarColor(context, room.id),
+                          onAvatarColor: _onAvatarColor(context, room.id),
+                          snoozePastDue: snoozePastDue,
+                          onClearSnooze: () => _clearSnoozeFromList(room.id),
                           onTap: () async {
                             await Navigator.of(context).push(
                               MaterialPageRoute(
@@ -342,22 +370,65 @@ class _ConversationListScreenState extends State<ConversationListScreen> {
                                   conversationId: room.id,
                                   title: _titleFor(room, me),
                                   isGroup: room.isGroup,
+                                  twinDisabledByFlood: room.twinDisabledByFlood,
                                 ),
                               ),
                             );
                             await _load();
                           },
+                        );
+                      },
+                    ),
+                  const SizedBox(height: 72),
+                ],
+              ),
+      ),
+    );
+  }
+}
+
+class _ConversationRow extends StatelessWidget {
+  const _ConversationRow({
+    required this.room,
+    required this.me,
+    required this.title,
+    required this.subtitle,
+    required this.avatarColor,
+    required this.onAvatarColor,
+    required this.snoozePastDue,
+    required this.onClearSnooze,
+    required this.onTap,
+  });
+
+  final ConversationSummary room;
+  final int? me;
+  final String title;
+  final String subtitle;
+  final Color avatarColor;
+  final Color onAvatarColor;
+  final bool snoozePastDue;
+  final VoidCallback onClearSnooze;
+  final VoidCallback onTap;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final blockedColor = room.twinDisabledByPeer || room.twinDisabledByFlood;
+    return Material(
+      color: Colors.transparent,
+      child: InkWell(
+        onTap: onTap,
         child: Padding(
           padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
           child: Row(
             children: [
               CircleAvatar(
                 radius: 22,
-                                backgroundColor: _avatarColor(context, room.id),
+                backgroundColor: avatarColor,
                 child: Icon(
                   room.isGroup ? Icons.groups_outlined : Icons.person_outline,
                   size: 20,
-                                  color: _onAvatarColor(context, room.id),
+                  color: onAvatarColor,
                 ),
               ),
               const SizedBox(width: 12),
@@ -366,30 +437,52 @@ class _ConversationListScreenState extends State<ConversationListScreen> {
                   crossAxisAlignment: CrossAxisAlignment.start,
                   children: [
                     Text(
-                                      _titleFor(room, me),
+                      title,
                       style: theme.textTheme.titleSmall?.copyWith(fontWeight: FontWeight.w600),
                     ),
                     const SizedBox(height: 2),
                     Row(
                       children: [
-                                        if (room.twinDisabledByPeer) ...[
-                                          Icon(Icons.block, size: 13, color: theme.colorScheme.error),
+                        if (blockedColor) ...[
+                          Icon(
+                            room.twinDisabledByFlood ? Icons.pause_circle_outline : Icons.block,
+                            size: 13,
+                            color: theme.colorScheme.error,
+                          ),
                           const SizedBox(width: 4),
                         ],
                         Expanded(
                           child: Text(
-                                            _subtitleFor(room, me),
+                            subtitle,
                             maxLines: 1,
                             overflow: TextOverflow.ellipsis,
                             style: theme.textTheme.bodySmall?.copyWith(
-                                              color: room.twinDisabledByPeer
-                                                  ? theme.colorScheme.error
-                                                  : theme.colorScheme.onSurfaceVariant,
+                              color: blockedColor ? theme.colorScheme.error : theme.colorScheme.onSurfaceVariant,
                             ),
                           ),
                         ),
                       ],
                     ),
+                    // 답장 마감 알림(roadmap.md §2.7-F) — 마감이 지난 스누즈만 배지로
+                    // 노출. 탭하면 채팅방을 열지 않고도 바로 해제할 수 있다.
+                    if (snoozePastDue) ...[
+                      const SizedBox(height: 4),
+                      InkWell(
+                        borderRadius: BorderRadius.circular(4),
+                        onTap: onClearSnooze,
+                        child: Row(
+                          mainAxisSize: MainAxisSize.min,
+                          children: [
+                            Icon(Icons.alarm, size: 13, color: theme.colorScheme.tertiary),
+                            const SizedBox(width: 4),
+                            Text(
+                              '답장 마감 (탭하여 해제)',
+                              style: theme.textTheme.labelSmall?.copyWith(color: theme.colorScheme.tertiary),
+                            ),
+                          ],
+                        ),
+                      ),
+                    ],
                   ],
                 ),
               ),
@@ -415,11 +508,6 @@ class _ConversationListScreenState extends State<ConversationListScreen> {
           ),
         ),
       ),
-                    ),
-                  const SizedBox(height: 72),
-                ],
-              ),
-      ),
     );
   }
 }

mobile/lib/screens/onboarding_tone_screen.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
+import '../models/models.dart';
 import '../state/session_state.dart';
 import '../widgets/primary_gradient_button.dart';
 
@@ -16,16 +17,19 @@ class OnboardingToneScreen extends StatefulWidget {
 class _OnboardingToneScreenState extends State<OnboardingToneScreen> {
   final _samples = List.generate(4, (_) => TextEditingController());
   var _seeded = false;
+  RelationshipTier _tier = RelationshipTier.formal;
 
   @override
   void didChangeDependencies() {
     super.didChangeDependencies();
     if (_seeded) return;
     _seeded = true;
-    final existing = context.read<SessionState>().styleExamples;
+    final session = context.read<SessionState>();
+    final existing = session.styleExamples;
     for (var i = 0; i < existing.length && i < _samples.length; i++) {
       _samples[i].text = existing[i];
     }
+    _tier = session.relationshipTier;
   }
 
   @override
@@ -42,6 +46,7 @@ class _OnboardingToneScreenState extends State<OnboardingToneScreen> {
       _samples.map((c) => c.text).toList(),
       markDone: markDone,
     );
+    await session.setRelationshipTier(_tier);
   }
 
   @override
@@ -84,7 +89,22 @@ class _OnboardingToneScreenState extends State<OnboardingToneScreen> {
               ),
               const SizedBox(height: 12),
             ],
-            const SizedBox(height: 8),
+            const SizedBox(height: 16),
+            Text('기본 관계 설정', style: theme.textTheme.titleSmall),
+            const SizedBox(height: 6),
+            Text(
+              '와카뷰가 초안을 쓸 때 기본으로 쓸 말투 격식이에요. 상대별로 나중에 연락처에서 따로 바꿀 수 있어요.',
+              style: theme.textTheme.bodySmall?.copyWith(color: scheme.onSurfaceVariant, height: 1.4),
+            ),
+            const SizedBox(height: 10),
+            SegmentedButton<RelationshipTier>(
+              segments: RelationshipTier.values
+                  .map((t) => ButtonSegment(value: t, label: Text(t.label)))
+                  .toList(),
+              selected: {_tier},
+              onSelectionChanged: (s) => setState(() => _tier = s.first),
+            ),
+            const SizedBox(height: 24),
             PrimaryGradientButton(
               label: '이 말투로 시작',
               onPressed: () => _save(markDone: true),

mobile/lib/services/api_client.dart

@@ -118,11 +118,15 @@ class ApiClient {
     required String displayName,
     int? contactUserId,
     String relationshipNote = '',
+    RelationshipTier? relationshipTier,
+    AutonomyLevel? autonomyLevel,
   }) async {
     final json = await _json('POST', '/users/$userId/contacts', body: {
       'display_name': displayName,
       if (contactUserId != null) 'contact_user_id': contactUserId,
       'relationship_note': relationshipNote,
+      if (relationshipTier != null) 'relationship_tier': relationshipTier.name,
+      if (autonomyLevel != null) 'autonomy_level': autonomyLevel.name,
     });
     return Contact.fromJson(json);
   }
@@ -133,11 +137,15 @@ class ApiClient {
     required String displayName,
     int? contactUserId,
     String relationshipNote = '',
+    RelationshipTier? relationshipTier,
+    AutonomyLevel? autonomyLevel,
   }) async {
     final json = await _json('PATCH', '/users/$userId/contacts/$contactId', body: {
       'display_name': displayName,
       if (contactUserId != null) 'contact_user_id': contactUserId,
       'relationship_note': relationshipNote,
+      if (relationshipTier != null) 'relationship_tier': relationshipTier.name,
+      if (autonomyLevel != null) 'autonomy_level': autonomyLevel.name,
     });
     return Contact.fromJson(json);
   }
@@ -185,6 +193,13 @@ class ApiClient {
     await _json('POST', '/conversations/$conversationId/veto');
   }
 
+  /// 도배 감지로 자동 중단된 대화방을 다시 켠다 (roadmap.md §2.7-C, AGENTS.md
+  /// "every automatic action needs post-hoc notification + one-tap undo").
+  /// 거부권(veto)과 달리 되돌릴 수 있다.
+  Future<void> resetFlood(int conversationId) async {
+    await _json('POST', '/conversations/$conversationId/flood-reset');
+  }
+
   /// 단톡 따라잡기(roadmap.md §2.7-A): advances the caller's read marker.
   Future<void> markRead(int conversationId, int messageId) async {
     await _json('POST', '/conversations/$conversationId/read', body: {
@@ -201,9 +216,14 @@ class ApiClient {
     await _json('POST', '/messages/$messageId/retract');
   }
 
-  Future<TwinSettings> patchTwinSettings(int userId, AutonomyLevel level) async {
+  Future<TwinSettings> patchTwinSettings({
+    required int userId,
+    required AutonomyLevel autonomyLevel,
+    RelationshipTier? relationshipTier,
+  }) async {
     final json = await _json('PATCH', '/users/$userId/twin-settings', body: {
-      'autonomy_level': level.name,
+      'autonomy_level': autonomyLevel.name,
+      if (relationshipTier != null) 'relationship_tier': relationshipTier.name,
     });
     return TwinSettings.fromJson(json);
   }

mobile/lib/services/snooze_controller.dart

@@ -0,0 +1,39 @@
+import '../db/app_database.dart';
+import 'snooze_notification_service.dart';
+
+/// 답장 마감 알림(roadmap.md §2.7-F) 오케스트레이션 — 온디바이스 DB(스누즈 시각 저장)와
+/// 알림 스케줄러(OS 로컬 알림) 호출을 한 곳에 묶는다. `chat_screen.dart`/
+/// `conversation_list_screen.dart`가 공유해서 쓴다.
+///
+/// 서버 호출은 전혀 없다 — AGENTS.md "Tone/style learning: on-device first"와 동일한
+/// 이유로, 이 리마인드는 순전히 이 기기·이 사용자만을 위한 것이라 서버에 올라갈 이유가
+/// 없다. 테스트에서는 [scheduler] 자리에 목(mock) 구현을 넣어 "DB에 정확히 반영되고
+/// 스케줄러가 올바른 id/시각/페이로드로 호출되는가"까지 검증한다 — 실제 OS 알림이
+/// 뜨는지는 이 방식으로 검증할 수 없다(샌드박스에 실기기/에뮬레이터가 없음).
+class SnoozeController {
+  SnoozeController({required AppDatabase db, required SnoozeNotificationScheduler scheduler})
+      : _db = db,
+        _scheduler = scheduler;
+
+  final AppDatabase _db;
+  final SnoozeNotificationScheduler _scheduler;
+
+  Future<DateTime?> loadSnoozedUntil(int conversationId) => _db.getSnoozedUntil(conversationId);
+
+  Future<Map<int, DateTime>> loadAllSnoozes() => _db.loadAllSnoozes();
+
+  Future<void> applySnooze({
+    required int conversationId,
+    required DateTime until,
+    required String title,
+    required String body,
+  }) async {
+    await _db.setSnoozedUntil(conversationId, until);
+    await _scheduler.scheduleReminder(conversationId: conversationId, title: title, body: body, at: until);
+  }
+
+  Future<void> clearSnooze(int conversationId) async {
+    await _db.clearSnooze(conversationId);
+    await _scheduler.cancelReminder(conversationId);
+  }
+}

mobile/lib/services/snooze_notification_service.dart

@@ -0,0 +1,10 @@
+/// 답장 마감 알림(roadmap.md §2.7-F)의 실제 OS 로컬 알림 스케줄러 — 플랫폼별 구현을
+/// 조건부 export로 분리한다 (`../db/app_database.dart`와 동일한 패턴).
+///
+/// Flutter Web은 `flutter_local_notifications`가 공식 지원하지 않는 플랫폼이고, 이
+/// 프로젝트의 웹 빌드는 애초에 프리뷰 서피스일 뿐 릴리스 타깃이 아니다
+/// (`app_database_web.dart` 주석 참고) — 웹에서는 스케줄링 호출이 조용히 no-op 처리된다.
+library;
+
+export 'snooze_notification_service_native.dart'
+    if (dart.library.html) 'snooze_notification_service_web.dart';

mobile/lib/services/snooze_notification_service_native.dart

@@ -0,0 +1,80 @@
+import 'package:flutter_local_notifications/flutter_local_notifications.dart';
+import 'package:timezone/data/latest.dart' as tz_data;
+import 'package:timezone/timezone.dart' as tz;
+
+/// 답장 마감 알림(roadmap.md §2.7-F, PRD.md §3.2 "내가 '이따 답장' 누르면 나에게만
+/// 리마인드")의 스케줄러 인터페이스. 다른 사람에게는 절대 보이지 않는, 이 기기에만
+/// 존재하는 로컬 알림 — AGENTS.md 온디바이스 우선 원칙과 정확히 일치.
+///
+/// 이 세션의 샌드박스에는 실제 Android/iOS 기기·에뮬레이터가 없어 알림이 실제로
+/// 뜨는지/탭했을 때의 동작까지는 검증할 수 없었다. 검증한 것은 `zonedSchedule()` /
+/// `cancel()` 호출이 올바른 id·시각·페이로드로 이뤄지는가뿐이며, 이는 이 인터페이스의
+/// 목(mock) 구현을 주입하는 단위 테스트(`test/snooze_notification_scheduler_test.dart`)로
+/// 확인했다.
+abstract class SnoozeNotificationScheduler {
+  Future<void> scheduleReminder({
+    required int conversationId,
+    required String title,
+    required String body,
+    required DateTime at,
+  });
+
+  Future<void> cancelReminder(int conversationId);
+}
+
+class LocalSnoozeNotificationScheduler implements SnoozeNotificationScheduler {
+  LocalSnoozeNotificationScheduler({FlutterLocalNotificationsPlugin? plugin})
+      : _plugin = plugin ?? FlutterLocalNotificationsPlugin();
+
+  final FlutterLocalNotificationsPlugin _plugin;
+  bool _initialized = false;
+
+  static const _channelId = 'reply_snooze_reminders';
+  static const _channelName = '답장 마감 알림';
+  static const _channelDescription = '"이따 답장" 스누즈 마감 시각 알림 (본인 기기에만 표시, 상대에게는 보이지 않음)';
+
+  Future<void> _ensureInitialized() async {
+    if (_initialized) return;
+    tz_data.initializeTimeZones();
+    const androidInit = AndroidInitializationSettings('@mipmap/ic_launcher');
+    const iosInit = DarwinInitializationSettings();
+    await _plugin.initialize(
+      settings: const InitializationSettings(android: androidInit, iOS: iosInit),
+    );
+    _initialized = true;
+  }
+
+  @override
+  Future<void> scheduleReminder({
+    required int conversationId,
+    required String title,
+    required String body,
+    required DateTime at,
+  }) async {
+    await _ensureInitialized();
+    await _plugin.zonedSchedule(
+      id: conversationId,
+      title: title,
+      body: body,
+      scheduledDate: tz.TZDateTime.from(at, tz.local),
+      notificationDetails: const NotificationDetails(
+        android: AndroidNotificationDetails(
+          _channelId,
+          _channelName,
+          channelDescription: _channelDescription,
+          importance: Importance.defaultImportance,
+          priority: Priority.defaultPriority,
+        ),
+        iOS: DarwinNotificationDetails(),
+      ),
+      // SCHEDULE_EXACT_ALARM 권한 없이도 동작하는 모드 — 개인 리마인드 용도라
+      // 초단위 정확도가 필요하지 않음 (Doze 모드에서도 결국은 전달됨).
+      androidScheduleMode: AndroidScheduleMode.inexactAllowWhileIdle,
+    );
+  }
+
+  @override
+  Future<void> cancelReminder(int conversationId) async {
+    await _plugin.cancel(id: conversationId);
+  }
+}

mobile/lib/services/snooze_notification_service_web.dart

@@ -0,0 +1,27 @@
+/// Web 빌드 스텁 — `flutter_local_notifications`는 웹을 지원하지 않고, 이 프로젝트의
+/// 웹 빌드는 프리뷰 서피스일 뿐 릴리스 타깃이 아니다(`app_database_web.dart` 주석 참고).
+/// 스누즈 저장(`AppDatabase`)은 웹에서도 동작하지만, 실제 OS 알림 스케줄링만 no-op —
+/// 대화 목록/채팅방의 "마감 지남" 배지·배너는 이 스텁과 무관하게 그대로 동작한다.
+abstract class SnoozeNotificationScheduler {
+  Future<void> scheduleReminder({
+    required int conversationId,
+    required String title,
+    required String body,
+    required DateTime at,
+  });
+
+  Future<void> cancelReminder(int conversationId);
+}
+
+class LocalSnoozeNotificationScheduler implements SnoozeNotificationScheduler {
+  @override
+  Future<void> scheduleReminder({
+    required int conversationId,
+    required String title,
+    required String body,
+    required DateTime at,
+  }) async {}
+
+  @override
+  Future<void> cancelReminder(int conversationId) async {}
+}

mobile/lib/services/snooze_service.dart

@@ -0,0 +1,49 @@
+/// 답장 마감 알림(roadmap.md §2.7-F, PRD.md §3.2 P1 "내가 '이따 답장' 누르면 나에게만
+/// 리마인드") 순수 로직. `DateTime.now()`에 의존하지 않고 `now`를 인자로 받는 함수들이라
+/// 테스트에서 고정된 시각으로 결정적으로 검증할 수 있다.
+library;
+
+/// "이따 답장"을 그냥 눌렀을 때(빠른 선택 없이) 적용되는 기본 스누즈 길이.
+const Duration kDefaultSnoozeDuration = Duration(hours: 2);
+
+/// 채팅방/대화 목록에 노출하는 빠른 선택지.
+enum SnoozeQuickPick { oneHour, thisEvening, tomorrowMorning }
+
+extension SnoozeQuickPickLabel on SnoozeQuickPick {
+  String get label => switch (this) {
+        SnoozeQuickPick.oneHour => '1시간 후',
+        SnoozeQuickPick.thisEvening => '저녁에',
+        SnoozeQuickPick.tomorrowMorning => '내일',
+      };
+}
+
+/// [now] 기준으로 빠른 선택지가 가리키는 실제 리마인드 시각을 계산한다.
+///
+/// - 1시간 후: 지금부터 정확히 1시간
+/// - 저녁에: 오늘 19시(이미 지났으면 내일 19시)
+/// - 내일: 내일 오전 9시
+DateTime resolveSnoozeQuickPick(SnoozeQuickPick pick, DateTime now) {
+  switch (pick) {
+    case SnoozeQuickPick.oneHour:
+      return now.add(const Duration(hours: 1));
+    case SnoozeQuickPick.thisEvening:
+      final evening = DateTime(now.year, now.month, now.day, 19);
+      return now.isBefore(evening) ? evening : evening.add(const Duration(days: 1));
+    case SnoozeQuickPick.tomorrowMorning:
+      final tomorrow = now.add(const Duration(days: 1));
+      return DateTime(tomorrow.year, tomorrow.month, tomorrow.day, 9);
+  }
+}
+
+/// 스누즈 마감이 [now] 기준으로 이미 지났는지 — 대화 목록 배지/채팅방 배너 표시 여부를
+/// 결정하는 순수 함수. `snoozedUntil`이 없으면 항상 false.
+bool isSnoozePastDue(DateTime now, DateTime? snoozedUntil) {
+  if (snoozedUntil == null) return false;
+  return !now.isBefore(snoozedUntil);
+}
+
+/// 스누즈가 걸려 있고 아직 마감 전인지(= 활성 스누즈).
+bool isSnoozeActive(DateTime now, DateTime? snoozedUntil) {
+  if (snoozedUntil == null) return false;
+  return now.isBefore(snoozedUntil);
+}

mobile/lib/state/session_state.dart

@@ -7,17 +7,27 @@ import '../db/app_database.dart';
 import '../models/models.dart';
 import '../services/api_client.dart';
 import '../services/push_token_service.dart';
+import '../services/snooze_controller.dart';
+import '../services/snooze_notification_service.dart';
 
 class SessionState extends ChangeNotifier {
-  SessionState({ApiClient? api, AppDatabase? db})
+  SessionState({ApiClient? api, AppDatabase? db, SnoozeNotificationScheduler? snoozeScheduler})
       : _api = api ?? ApiClient(),
-        _db = db;
+        _db = db,
+        _snoozeScheduler = snoozeScheduler ?? LocalSnoozeNotificationScheduler();
 
   final ApiClient _api;
   AppDatabase? _db;
+  final SnoozeNotificationScheduler _snoozeScheduler;
+
+  /// 답장 마감 알림(roadmap.md §2.7-F) 오케스트레이션 — DB(스누즈 시각)와 로컬 알림
+  /// 스케줄러를 함께 다룬다. DB가 아직 열리지 않았으면(부팅 초기) null.
+  SnoozeController? get snoozeController =>
+      _db == null ? null : SnoozeController(db: _db!, scheduler: _snoozeScheduler);
 
   User? user;
   AutonomyLevel autonomyLevel = AutonomyLevel.L0;
+  RelationshipTier relationshipTier = RelationshipTier.formal;
   String? error;
   bool loading = false;
   bool toneOnboardingDone = false;
@@ -139,8 +149,9 @@ class SessionState extends ChangeNotifier {
   Future<void> setAutonomy(AutonomyLevel level) async {
     if (user == null) return;
     try {
-      final settings = await _api.patchTwinSettings(user!.id, level);
+      final settings = await _api.patchTwinSettings(userId: user!.id, autonomyLevel: level);
       autonomyLevel = settings.autonomyLevel;
+      relationshipTier = settings.relationshipTier;
       notifyListeners();
     } on ApiException catch (e) {
       error = '자율성 변경 실패 (${e.statusCode})';
@@ -148,6 +159,24 @@ class SessionState extends ChangeNotifier {
     }
   }
 
+  /// 관계별 페르소나 전역 기본값 변경 (roadmap.md §2.7-B).
+  Future<void> setRelationshipTier(RelationshipTier tier) async {
+    if (user == null) return;
+    try {
+      final settings = await _api.patchTwinSettings(
+        userId: user!.id,
+        autonomyLevel: autonomyLevel,
+        relationshipTier: tier,
+      );
+      autonomyLevel = settings.autonomyLevel;
+      relationshipTier = settings.relationshipTier;
+      notifyListeners();
+    } on ApiException catch (e) {
+      error = '관계 설정 변경 실패 (${e.statusCode})';
+      notifyListeners();
+    }
+  }
+
   /// Registers a real FCM token when Firebase is configured; otherwise a stable
   /// `install:` placeholder (server skips placeholders for delivery).
   Future<void> _registerDeviceTokenBestEffort() async {

mobile/pubspec.lock

@@ -177,6 +177,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "3.1.2"
+  dbus:
+    dependency: transitive
+    description:
+      name: dbus
+      sha256: "0ce9b0a839e6dee59a37a623d2fc26a35bbbe6404213e419b0d6411023d62645"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.14"
   drift:
     dependency: "direct main"
     description:
@@ -286,6 +294,38 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "5.0.0"
+  flutter_local_notifications:
+    dependency: "direct main"
+    description:
+      name: flutter_local_notifications
+      sha256: "2b50e938a275e1ad77352d6a25e25770f4130baa61eaf02de7a9a884680954ad"
+      url: "https://pub.dev"
+    source: hosted
+    version: "20.1.0"
+  flutter_local_notifications_linux:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_linux
+      sha256: dce0116868cedd2cdf768af0365fc37ff1cbef7c02c4f51d0587482e625868d0
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.0"
+  flutter_local_notifications_platform_interface:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_platform_interface
+      sha256: "23de31678a48c084169d7ae95866df9de5c9d2a44be3e5915a2ff067aeeba899"
+      url: "https://pub.dev"
+    source: hosted
+    version: "10.0.0"
+  flutter_local_notifications_windows:
+    dependency: transitive
+    description:
+      name: flutter_local_notifications_windows
+      sha256: e97a1a3016512437d9c0b12fae7d1491c3c7b9aa7f03a69b974308840656b02a
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.1"
   flutter_secure_storage:
     dependency: "direct main"
     description:
@@ -552,6 +592,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.0"
+  petitparser:
+    dependency: transitive
+    description:
+      name: petitparser
+      sha256: "91bd59303e9f769f108f8df05e371341b15d59e995e6806aefab827b58336675"
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.2"
   platform:
     dependency: transitive
     description:
@@ -773,6 +821,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.11"
+  timezone:
+    dependency: "direct main"
+    description:
+      name: timezone
+      sha256: dd14a3b83cfd7cb19e7888f1cbc20f258b8d71b54c06f79ac585f14093a287d1
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.1"
   typed_data:
     dependency: transitive
     description:
@@ -845,6 +901,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.1.0"
+  xml:
+    dependency: transitive
+    description:
+      name: xml
+      sha256: "971043b3a0d3da28727e40ed3e0b5d18b742fa5a68665cca88e74b7876d5e025"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.6.1"
   yaml:
     dependency: transitive
     description:
@@ -855,4 +919,4 @@ packages:
     version: "3.1.3"
 sdks:
   dart: ">=3.10.0-0 <4.0.0"
-  flutter: ">=3.29.0"
+  flutter: ">=3.32.0"

mobile/pubspec.yaml

@@ -47,6 +47,8 @@ dependencies:
   google_fonts: ^6.3.2
   firebase_core: ^4.12.1
   firebase_messaging: ^16.4.3
+  flutter_local_notifications: ^20.1.0
+  timezone: ^0.10.1
 
 dev_dependencies:
   flutter_test:

mobile/test/local_db_test.dart

@@ -15,4 +15,34 @@ void main() {
     await db.replaceToneSamples(['하나만']);
     expect(await db.loadToneSamples(), ['하나만']);
   });
+
+  // roadmap.md §2.7-F 답장 마감 알림: 스누즈 시각은 서버로 전혀 전송되지 않는
+  // 순수 온디바이스 상태라 tone samples와 동일한 방식(in-memory DB round-trip)으로
+  // 검증한다.
+  test('conversation snooze round-trips in memory database', () async {
+    final db = AppDatabase.memory();
+    addTearDown(db.close);
+
+    expect(await db.getSnoozedUntil(42), isNull);
+
+    final until = DateTime.utc(2026, 8, 3, 20, 0);
+    await db.setSnoozedUntil(42, until);
+    expect(await db.getSnoozedUntil(42), until);
+
+    // 다른 대화방(id 43)에는 영향 없음.
+    expect(await db.getSnoozedUntil(43), isNull);
+
+    // 다시 걸면(insertOnConflictUpdate) 덮어써야 한다 — 새 행이 추가되면 안 됨.
+    final rescheduled = DateTime.utc(2026, 8, 4, 9, 0);
+    await db.setSnoozedUntil(42, rescheduled);
+    expect(await db.getSnoozedUntil(42), rescheduled);
+
+    await db.setSnoozedUntil(43, until);
+    final all = await db.loadAllSnoozes();
+    expect(all, {42: rescheduled, 43: until});
+
+    await db.clearSnooze(42);
+    expect(await db.getSnoozedUntil(42), isNull);
+    expect(await db.loadAllSnoozes(), {43: until});
+  });
 }

mobile/test/models_test.dart

@@ -13,9 +13,26 @@ void main() {
     expect(c.id, 3);
     expect(c.userIds, [1, 2]);
     expect(c.twinDisabledByPeer, isTrue);
+    expect(c.twinDisabledByFlood, isFalse);
     expect(c.titleFor(1), '대화 · 상대 #2');
   });
 
+  // roadmap.md §2.7-C 스팸/도배 감지: twin_disabled_by_flood parses
+  // independently of twin_disabled_by_peer and defaults to false when absent
+  // (covered by the test above).
+  test('ConversationSummary parses twin_disabled_by_flood', () {
+    final c = ConversationSummary.fromJson({
+      'id': 4,
+      'is_group': false,
+      'twin_disabled_by_peer': false,
+      'twin_disabled_by_flood': true,
+      'user_ids': [1, 2],
+      'created_at': '2026-07-30T00:00:00Z',
+    });
+    expect(c.twinDisabledByPeer, isFalse);
+    expect(c.twinDisabledByFlood, isTrue);
+  });
+
   test('EscalationLogEntry and Contact parse', () {
     final log = EscalationLogEntry.fromJson({
       'id': 9,
@@ -33,5 +50,28 @@ void main() {
       'relationship_note': '대학',
     });
     expect(contact.contactUserId, 7);
+    expect(contact.relationshipTier, isNull);
+    expect(contact.autonomyLevel, isNull);
+  });
+
+  // roadmap.md §2.7-D: Contact.autonomyLevel is a nullable per-contact
+  // override of the global autonomy level, parsed only when present --
+  // mirrors relationshipTier's null-safe parsing above.
+  test('Contact parses autonomy_level override when present', () {
+    final withOverride = Contact.fromJson({
+      'id': 2,
+      'display_name': '친구2',
+      'contact_user_id': 8,
+      'autonomy_level': 'L2',
+    });
+    expect(withOverride.autonomyLevel, AutonomyLevel.L2);
+    expect(withOverride.autonomyLevel!.label, 'L2');
+
+    final withoutOverride = Contact.fromJson({
+      'id': 3,
+      'display_name': '친구3',
+      'contact_user_id': 9,
+    });
+    expect(withoutOverride.autonomyLevel, isNull);
   });
 }

mobile/test/snooze_controller_test.dart

@@ -0,0 +1,86 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ykavu_mobile/db/app_database.dart';
+import 'package:ykavu_mobile/services/snooze_controller.dart';
+import 'package:ykavu_mobile/services/snooze_notification_service.dart';
+
+/// 실제 `flutter_local_notifications` 플러그인 대신 호출 인자를 기록만 하는 목(mock).
+/// 이 세션의 샌드박스에는 실기기/에뮬레이터가 없어 알림이 실제로 뜨는지는 검증할 수
+/// 없으므로, 대신 "스케줄/취소 호출이 올바른 id·시각·페이로드로 이뤄지는가"만 검증한다.
+class _FakeScheduler implements SnoozeNotificationScheduler {
+  final scheduledCalls = <Map<String, Object?>>[];
+  final cancelledIds = <int>[];
+
+  @override
+  Future<void> scheduleReminder({
+    required int conversationId,
+    required String title,
+    required String body,
+    required DateTime at,
+  }) async {
+    scheduledCalls.add({
+      'conversationId': conversationId,
+      'title': title,
+      'body': body,
+      'at': at,
+    });
+  }
+
+  @override
+  Future<void> cancelReminder(int conversationId) async {
+    cancelledIds.add(conversationId);
+  }
+}
+
+void main() {
+  late AppDatabase db;
+  late _FakeScheduler scheduler;
+  late SnoozeController controller;
+
+  setUp(() {
+    db = AppDatabase.memory();
+    scheduler = _FakeScheduler();
+    controller = SnoozeController(db: db, scheduler: scheduler);
+  });
+
+  tearDown(() => db.close());
+
+  test('applySnooze persists to DB and schedules with exact id/time/payload', () async {
+    final until = DateTime.utc(2026, 8, 3, 21, 0);
+    await controller.applySnooze(
+      conversationId: 7,
+      until: until,
+      title: '답장 마감',
+      body: '상대#7에게 답장할 시간이에요',
+    );
+
+    expect(await controller.loadSnoozedUntil(7), until);
+    expect(scheduler.scheduledCalls, hasLength(1));
+    expect(scheduler.scheduledCalls.single, {
+      'conversationId': 7,
+      'title': '답장 마감',
+      'body': '상대#7에게 답장할 시간이에요',
+      'at': until,
+    });
+  });
+
+  test('clearSnooze removes from DB and cancels the scheduled reminder', () async {
+    final until = DateTime.utc(2026, 8, 3, 21, 0);
+    await controller.applySnooze(conversationId: 9, until: until, title: 't', body: 'b');
+    expect(await controller.loadSnoozedUntil(9), isNotNull);
+
+    await controller.clearSnooze(9);
+
+    expect(await controller.loadSnoozedUntil(9), isNull);
+    expect(scheduler.cancelledIds, [9]);
+  });
+
+  test('loadAllSnoozes reflects multiple conversations independently', () async {
+    final until1 = DateTime.utc(2026, 8, 3, 21, 0);
+    final until2 = DateTime.utc(2026, 8, 4, 9, 0);
+    await controller.applySnooze(conversationId: 1, until: until1, title: 't', body: 'b');
+    await controller.applySnooze(conversationId: 2, until: until2, title: 't', body: 'b');
+
+    expect(await controller.loadAllSnoozes(), {1: until1, 2: until2});
+    expect(scheduler.scheduledCalls, hasLength(2));
+  });
+}

mobile/test/snooze_service_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+import 'package:ykavu_mobile/services/snooze_service.dart';
+
+void main() {
+  group('isSnoozePastDue / isSnoozeActive', () {
+    // 고정된 "now"를 넘겨 결정적으로 검증한다 (DateTime.now() 실시간 의존 금지).
+    final now = DateTime(2026, 8, 3, 12, 0);
+
+    test('no snooze set -> never past due, never active', () {
+      expect(isSnoozePastDue(now, null), isFalse);
+      expect(isSnoozeActive(now, null), isFalse);
+    });
+
+    test('snooze in the future -> active, not past due', () {
+      final until = now.add(const Duration(hours: 1));
+      expect(isSnoozePastDue(now, until), isFalse);
+      expect(isSnoozeActive(now, until), isTrue);
+    });
+
+    test('snooze in the past -> past due, not active', () {
+      final until = now.subtract(const Duration(minutes: 1));
+      expect(isSnoozePastDue(now, until), isTrue);
+      expect(isSnoozeActive(now, until), isFalse);
+    });
+
+    test('snooze exactly at now -> counts as past due (boundary)', () {
+      expect(isSnoozePastDue(now, now), isTrue);
+      expect(isSnoozeActive(now, now), isFalse);
+    });
+  });
+
+  group('resolveSnoozeQuickPick', () {
+    test('oneHour adds exactly one hour', () {
+      final now = DateTime(2026, 8, 3, 12, 0);
+      expect(resolveSnoozeQuickPick(SnoozeQuickPick.oneHour, now), DateTime(2026, 8, 3, 13, 0));
+    });
+
+    test('thisEvening resolves to 19:00 today when now is before 19:00', () {
+      final now = DateTime(2026, 8, 3, 12, 0);
+      expect(resolveSnoozeQuickPick(SnoozeQuickPick.thisEvening, now), DateTime(2026, 8, 3, 19, 0));
+    });
+
+    test('thisEvening rolls over to tomorrow 19:00 when now is already past 19:00', () {
+      final now = DateTime(2026, 8, 3, 20, 30);
+      expect(resolveSnoozeQuickPick(SnoozeQuickPick.thisEvening, now), DateTime(2026, 8, 4, 19, 0));
+    });
+
+    test('thisEvening rolls over exactly at 19:00 (boundary is not "before")', () {
+      final now = DateTime(2026, 8, 3, 19, 0);
+      expect(resolveSnoozeQuickPick(SnoozeQuickPick.thisEvening, now), DateTime(2026, 8, 4, 19, 0));
+    });
+
+    test('tomorrowMorning resolves to 09:00 the next day', () {
+      final now = DateTime(2026, 8, 3, 23, 45);
+      expect(resolveSnoozeQuickPick(SnoozeQuickPick.tomorrowMorning, now), DateTime(2026, 8, 4, 9, 0));
+    });
+
+    test('quick pick labels are the fixed Korean copy used in the UI', () {
+      expect(SnoozeQuickPick.oneHour.label, '1시간 후');
+      expect(SnoozeQuickPick.thisEvening.label, '저녁에');
+      expect(SnoozeQuickPick.tomorrowMorning.label, '내일');
+    });
+  });
+}