diff --git a/.ai/domain/domain-map.md b/.ai/domain/domain-map.md
index 82b4109..b27ebd8 100644
--- a/.ai/domain/domain-map.md
+++ b/.ai/domain/domain-map.md
@@ -37,7 +37,7 @@
 | Ops_Content | ExploreConfig (partial) | Shipped Ops-C |
 | Account_Risk | AccountLifecycle | Spec via ECR-013B（Identity_Profile owns UserStatus） |
 | Content_Safety | ContentSafety · CrisisCare | ContentSafety **ECR-019**（FilterRule）；CrisisCare Draft |
-| Ask_Ops | AskOperations · AICoreConfig | AskOperations **ECR-017**（只读）；AICoreConfig Draft |
+| Ask_Ops | AskOperations · AICoreConfig | AskOperations **ECR-017/020**；AICoreConfig Draft |
 | Ops_CMS_NoUGC | OpsCMS | Draft |
 | Community | — | **Forbidden** |
 
diff --git a/.ai/domain/entity-catalog.md b/.ai/domain/entity-catalog.md
index c73fd6f..83cbd80 100644
--- a/.ai/domain/entity-catalog.md
+++ b/.ai/domain/entity-catalog.md
@@ -32,7 +32,7 @@ Status: `Draft`
 | ModerationCase | Content_Safety | ContentSafety | 后置 |
 | CrisisEvent / CrisisPolicy | Content_Safety | CrisisCare | 后置 |
 | SystemPrompt / Knowledge* / ToolDefinition | Ask_Ops | AICoreConfig | 后置 |
-| AskSessionView / QualityFeedback | Ask_Ops | AskOperations | **ECR-017** AskSessionView 只读；QualityFeedback 后置 |
+| AskSessionView / QualityFeedback | Ask_Ops | AskOperations | **ECR-017** AskSessionView；**ECR-020** QualityFeedback |
 | Banner / FeedSlot | Ops_CMS_NoUGC | OpsCMS | 后置 |
 | UGC* | Community | — | **Forbidden** |
 
diff --git a/.ai/product/feature-map.md b/.ai/product/feature-map.md
index ab00f2f..eca066d 100644
--- a/.ai/product/feature-map.md
+++ b/.ai/product/feature-map.md
@@ -235,7 +235,7 @@ UI **不出现「塔罗」**。禁止神谕吉凶、恐吓话术。
 | Phase A `[Ops]` | 登录 · 用户/订单查询 · 会员授予 · 审计 · `apps/admin-h5`（ECR-006 Closed） |
 | Phase B `[Ops]` | 行为分析：自有埋点 + 管理端「数据」看板（**ECR-007 Closed** · Spec `ops-analytics.md`） |
 | Phase C `[Ops]` | 内容：首页宫格 CRUD · 测评上下架（**ECR-008 Closed** · Spec `ops-content.md`） |
-| Phase D+ | **Contract-First**：**ECR-013A…018 Closed** → **ECR-019** ContentSafety（Loop）。`docs/WAVE0/LOOP_AUTHORIZATION.md`。 |
+| Phase D+ | **Contract-First**：**ECR-013A…019 Closed** → **ECR-020** QualityFeedback（Loop）。`docs/WAVE0/LOOP_AUTHORIZATION.md`。 |
 | 排除 | **UGC / 社区广场**（M10.2）仍 `[No]`；真支付最后 |
 
 不计入 P1 Complete；不进入五 Tab。
diff --git a/.ai/product/feature-spec/README.md b/.ai/product/feature-spec/README.md
index af18cd7..2909af6 100644
--- a/.ai/product/feature-spec/README.md
+++ b/.ai/product/feature-spec/README.md
@@ -29,6 +29,7 @@
 | [ops-ask-operations.md](ops-ask-operations.md) | 问答运营 AskOperations | §7 | `admin-h5` `/ask` · `GET /admin/ask/threads*` | Ops-D · **ECR-017 Closed** |
 | [ops-entitlement.md](ops-entitlement.md) | 用户权益 Entitlement | §7 | `admin-h5` 用户详情「权益」· `GET /admin/users/:id/entitlements` | Ops-D · **ECR-018 Closed** |
 | [ops-content-safety.md](ops-content-safety.md) | 内容安全 ContentSafety | §7 | `admin-h5` `/safety` · `GET /admin/content-safety/*` | Ops-D · **ECR-019 Closed** |
+| [ops-quality-feedback.md](ops-quality-feedback.md) | 问答质量反馈 QualityFeedback | §7 | `admin-h5` `/ask` · `GET/POST /admin/ask/feedback*` | Ops-D · **ECR-020 Closed** |
 
 新功能：复制 `_TEMPLATE.md` → 填满 → 在本表登记 → 再编码。
 
diff --git a/.ai/product/feature-spec/ops-admin.md b/.ai/product/feature-spec/ops-admin.md
index c656b48..1f32a32 100644
--- a/.ai/product/feature-spec/ops-admin.md
+++ b/.ai/product/feature-spec/ops-admin.md
@@ -216,6 +216,7 @@ Phase A 可先 `console`/本地；不挡验收。
 | **J（ECR-017 Closed）** | AskOperations — Spec `ops-ask-operations.md` |
 | **K（ECR-018 Closed）** | Entitlement — Spec `ops-entitlement.md` |
 | **L（ECR-019 Closed）** | ContentSafety FilterRule — Spec `ops-content-safety.md` |
-| 后置 | QualityFeedback / AICoreConfig / CrisisCare（Loop 续跑） |
+| **M（ECR-020 Closed）** | QualityFeedback — Spec `ops-quality-feedback.md` |
+| 后置 | AICoreConfig / CrisisCare（Loop 续跑） |
 | D | 订单筛选 · 展示价 · 退款只读（另开 ECR） |
 | 后置 | 封禁加深（Account_Risk）· 推送占位 |
diff --git a/.ai/product/feature-spec/ops-quality-feedback.md b/.ai/product/feature-spec/ops-quality-feedback.md
new file mode 100644
index 0000000..ab2b192
--- /dev/null
+++ b/.ai/product/feature-spec/ops-quality-feedback.md
@@ -0,0 +1,42 @@
+# Feature Spec: QualityFeedback（Ops · ECR-020）
+
+> Status: `Active`（Loop continuous · **ECR-020 Closed**）  
+> Parent: WAVE0-FROZEN · Predecessor: ECR-019 Closed  
+> Capability: `AskOperations` · BC: `Ask_Ops`  
+> 授权：`docs/WAVE0/LOOP_AUTHORIZATION.md`
+
+## Non-goals
+
+改写消息正文 · SystemPrompt/Knowledge · HandoffCase 全量 · AICoreConfig · UGC 广场 · 真支付
+
+## L2 Domain
+
+| 概念 | 语义 |
+|------|------|
+| `QualityFeedback` | 绑定 thread（可选 message）；rating 1–5；tag ∈ {helpful,off_topic,unsafe,other}；source ∈ {admin,user} |
+
+## L3 API
+
+| Method | Path | 权限 | 语义 |
+|--------|------|------|------|
+| GET | `/admin/ask/feedback` | `admin.ask.read` | 列表 |
+| POST | `/admin/ask/threads/:id/feedback` | `admin.ask.feedback.write` | 运营提交 |
+| POST | `/ask/threads/:id/feedback` | DeviceAuth 用户 | C 端评分 |
+
+## Migration
+
+`000021`：`ask_quality_feedback` + 授予 `admin.ask.feedback.write`
+
+## L4 AC
+
+| ID | Then |
+|----|------|
+| AC-F-01 | admin POST feedback → 200 · list 可见 |
+| AC-F-02 | user POST feedback → 200 |
+| AC-F-03 | 无效 rating → 400 |
+| AC-S-01 | 无 Admin → admin list 401 |
+| AC-S-02 | 无 feedback.write → admin POST 403 |
+| AC-P-01 | list < 500ms |
+| AC-O-01 | admin 提交写 AuditLog `ask.feedback.create` |
+
+contract_diff: `docs/CONTRACT_DIFF/ECR-020.yaml`
diff --git a/apps/admin-h5/src/api/client.ts b/apps/admin-h5/src/api/client.ts
index e67177d..8b772df 100644
--- a/apps/admin-h5/src/api/client.ts
+++ b/apps/admin-h5/src/api/client.ts
@@ -275,6 +275,26 @@ export const adminApi = {
       '/content-safety/evaluate',
       { text },
     ),
+  askFeedback: () =>
+    request<{
+      items: Array<{
+        id: string
+        thread_id: string
+        message_id?: string
+        source: string
+        rating: number
+        tag?: string
+        note?: string
+        created_at: string
+      }>
+    }>('GET', '/ask/feedback'),
+  createAskFeedback: (threadId: string, body: { rating: number; tag?: string; note?: string; message_id?: string }) =>
+    request<{
+      id: string
+      thread_id: string
+      rating: number
+      source: string
+    }>('POST', `/ask/threads/${threadId}/feedback`, body),
   orders: () =>
     request<{
       items: Array<{
diff --git a/apps/admin-h5/src/pages/AskPage.vue b/apps/admin-h5/src/pages/AskPage.vue
index 699e268..333d58c 100644
--- a/apps/admin-h5/src/pages/AskPage.vue
+++ b/apps/admin-h5/src/pages/AskPage.vue
@@ -2,23 +2,34 @@
 import { onMounted, ref } from 'vue'
 import { RouterLink } from 'vue-router'
 import { adminApi } from '@/api/client'
+import { useAuthStore } from '@/stores/auth'
 
 type Thread = Awaited<ReturnType<typeof adminApi.askThreads>>['items'][number]
 type Detail = Awaited<ReturnType<typeof adminApi.askThread>>
+type Feedback = Awaited<ReturnType<typeof adminApi.askFeedback>>['items'][number]
 
+const auth = useAuthStore()
 const loading = ref(false)
 const error = ref('')
 const items = ref<Thread[]>([])
 const selected = ref<Detail | null>(null)
 const detailErr = ref('')
 const detailLoading = ref(false)
+const feedback = ref<Feedback[]>([])
+const rating = ref(4)
+const tag = ref('helpful')
+const note = ref('')
+const fbMsg = ref('')
+
+const canWriteFeedback = () => auth.can('admin.ask.feedback.write')
 
 async function load() {
   loading.value = true
   error.value = ''
   try {
-    const res = await adminApi.askThreads()
-    items.value = res.items || []
+    const [threads, fb] = await Promise.all([adminApi.askThreads(), adminApi.askFeedback()])
+    items.value = threads.items || []
+    feedback.value = fb.items || []
   } catch (e) {
     error.value = e instanceof Error ? e.message : '加载失败'
   } finally {
@@ -30,6 +41,7 @@ async function openThread(id: string) {
   detailLoading.value = true
   detailErr.value = ''
   selected.value = null
+  fbMsg.value = ''
   try {
     selected.value = await adminApi.askThread(id)
   } catch (e) {
@@ -39,6 +51,24 @@ async function openThread(id: string) {
   }
 }
 
+async function submitFeedback() {
+  if (!selected.value) return
+  fbMsg.value = ''
+  try {
+    await adminApi.createAskFeedback(selected.value.id, {
+      rating: rating.value,
+      tag: tag.value,
+      note: note.value || undefined,
+    })
+    fbMsg.value = '已提交质量反馈'
+    note.value = ''
+    const fb = await adminApi.askFeedback()
+    feedback.value = fb.items || []
+  } catch (e) {
+    fbMsg.value = e instanceof Error ? e.message : '提交失败'
+  }
+}
+
 function fmtTime(iso?: string) {
   if (!iso) return '—'
   try {
@@ -54,7 +84,7 @@ onMounted(load)
 <template>
   <section>
     <h1>问答会话</h1>
-    <p class="muted">只读 AskSessionView · 不可改写消息</p>
+    <p class="muted">AskSessionView · QualityFeedback · 不可改写消息</p>
     <p v-if="loading" class="muted">加载中…</p>
     <p v-else-if="error" class="err">{{ error }}</p>
     <div v-else class="layout">
@@ -76,6 +106,13 @@ onMounted(load)
             </tr>
           </tbody>
         </table>
+        <h2 class="sub">近期反馈</h2>
+        <p v-if="!feedback.length" class="muted">暂无</p>
+        <ul v-else class="fb-list">
+          <li v-for="f in feedback.slice(0, 8)" :key="f.id">
+            {{ f.source }} · {{ f.rating }}★ · {{ f.tag || '—' }} · {{ fmtTime(f.created_at) }}
+          </li>
+        </ul>
       </div>
       <div class="card detail">
         <h2>会话详情</h2>
@@ -93,6 +130,25 @@ onMounted(load)
               <time>{{ fmtTime(m.created_at) }}</time>
             </li>
           </ul>
+          <div v-if="canWriteFeedback()" class="fb-form">
+            <h3>质量反馈</h3>
+            <select v-model.number="rating">
+              <option :value="1">1</option>
+              <option :value="2">2</option>
+              <option :value="3">3</option>
+              <option :value="4">4</option>
+              <option :value="5">5</option>
+            </select>
+            <select v-model="tag">
+              <option value="helpful">helpful</option>
+              <option value="off_topic">off_topic</option>
+              <option value="unsafe">unsafe</option>
+              <option value="other">other</option>
+            </select>
+            <input v-model="note" type="text" placeholder="备注（可选）" />
+            <button class="btn" type="button" @click="submitFeedback">提交</button>
+            <span class="muted">{{ fbMsg }}</span>
+          </div>
         </template>
         <p v-else class="muted">选择左侧会话查看消息</p>
       </div>
@@ -103,6 +159,8 @@ onMounted(load)
 <style scoped>
 h1 { margin: 0 0 0.35rem; font-size: 1.35rem; }
 h2 { margin: 0 0 0.6rem; font-size: 1.05rem; }
+h2.sub { margin-top: 1rem; font-size: 0.95rem; }
+h3 { margin: 0.75rem 0 0.4rem; font-size: 0.95rem; }
 .layout {
   display: grid;
   grid-template-columns: 1.1fr 1fr;
@@ -121,6 +179,15 @@ h2 { margin: 0 0 0.6rem; font-size: 1.05rem; }
 .msgs p { margin: 0.25rem 0; white-space: pre-wrap; word-break: break-word; }
 .msgs time { font-size: 0.75rem; color: var(--muted); }
 .msgs .assistant { background: rgba(255, 244, 242, 0.6); }
+.fb-list { margin: 0; padding-left: 1.1rem; font-size: 0.85rem; color: var(--muted); }
+.fb-form {
+  display: flex; flex-wrap: wrap; gap: 0.45rem; align-items: center;
+  margin-top: 0.85rem; padding-top: 0.75rem; border-top: 1px solid var(--line);
+}
+.fb-form select, .fb-form input {
+  border: 1px solid var(--line); border-radius: 8px; padding: 0.4rem 0.55rem;
+}
+.fb-form input { min-width: 10rem; flex: 1; }
 @media (max-width: 900px) {
   .layout { grid-template-columns: 1fr; }
 }
diff --git a/apps/api/internal/handler/admin.go b/apps/api/internal/handler/admin.go
index 6dd3c26..14eb0a6 100644
--- a/apps/api/internal/handler/admin.go
+++ b/apps/api/internal/handler/admin.go
@@ -48,6 +48,7 @@ func (h *AdminHandler) Register(api *gin.RouterGroup) {
 	h.registerRedemption(authed)
 	h.registerInsight(authed)
 	h.registerAskOps(authed)
+	h.registerQualityFeedback(authed)
 	h.registerEntitlement(authed)
 	h.registerContentSafety(authed)
 }
diff --git a/apps/api/internal/handler/admin_quality_feedback.go b/apps/api/internal/handler/admin_quality_feedback.go
new file mode 100644
index 0000000..94664b0
--- /dev/null
+++ b/apps/api/internal/handler/admin_quality_feedback.go
@@ -0,0 +1,76 @@
+package handler
+
+import (
+	"errors"
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+
+	"github.com/yuxingu/digital-psychology/apps/api/internal/middleware"
+	"github.com/yuxingu/digital-psychology/apps/api/internal/service/admin"
+	"github.com/yuxingu/digital-psychology/apps/api/pkg/response"
+)
+
+func (h *AdminHandler) registerQualityFeedback(authed *gin.RouterGroup) {
+	authed.GET("/ask/feedback", middleware.RequireAdminPermission(h.Svc, admin.PermAskRead), h.ListAskFeedback)
+	authed.POST("/ask/threads/:id/feedback", middleware.RequireAdminPermission(h.Svc, admin.PermAskFeedbackWrite), h.CreateAskFeedback)
+}
+
+func (h *AdminHandler) ListAskFeedback(c *gin.Context) {
+	limit, _ := strconv.Atoi(c.DefaultQuery("limit", "20"))
+	offset, _ := strconv.Atoi(c.DefaultQuery("offset", "0"))
+	items, err := h.Svc.ListQualityFeedback(c.Request.Context(), limit, offset)
+	if err != nil {
+		response.Fail(c, http.StatusInternalServerError, 50025, "list feedback failed")
+		return
+	}
+	response.OK(c, gin.H{"items": items})
+}
+
+func (h *AdminHandler) CreateAskFeedback(c *gin.Context) {
+	adminID, ok := middleware.AdminIDFromContext(c)
+	if !ok {
+		response.Fail(c, http.StatusUnauthorized, 40102, "admin session invalid")
+		return
+	}
+	threadID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		response.Fail(c, http.StatusBadRequest, 40002, "invalid thread id")
+		return
+	}
+	var body struct {
+		Rating    int     `json:"rating"`
+		Tag       string  `json:"tag"`
+		Note      string  `json:"note"`
+		MessageID *string `json:"message_id"`
+	}
+	if err := c.ShouldBindJSON(&body); err != nil {
+		response.Fail(c, http.StatusBadRequest, 40000, "invalid body")
+		return
+	}
+	var msgID *uuid.UUID
+	if body.MessageID != nil && *body.MessageID != "" {
+		id, err := uuid.Parse(*body.MessageID)
+		if err != nil {
+			response.Fail(c, http.StatusBadRequest, 40002, "invalid message_id")
+			return
+		}
+		msgID = &id
+	}
+	row, err := h.Svc.CreateQualityFeedback(c.Request.Context(), adminID, threadID, msgID, body.Rating, body.Tag, body.Note)
+	if errors.Is(err, admin.ErrBadFeedbackRating) || errors.Is(err, admin.ErrBadFeedbackTag) || errors.Is(err, admin.ErrFeedbackNoteLong) {
+		response.Fail(c, http.StatusBadRequest, 40000, err.Error())
+		return
+	}
+	if errors.Is(err, admin.ErrAskThreadNotFound) {
+		response.Fail(c, http.StatusNotFound, 40402, "ask thread not found")
+		return
+	}
+	if err != nil {
+		response.Fail(c, http.StatusInternalServerError, 50026, "create feedback failed")
+		return
+	}
+	response.OK(c, row)
+}
diff --git a/apps/api/internal/handler/ask.go b/apps/api/internal/handler/ask.go
index f69e4f1..b72f6c9 100644
--- a/apps/api/internal/handler/ask.go
+++ b/apps/api/internal/handler/ask.go
@@ -26,6 +26,7 @@ func (h *AskHandler) Register(rg *gin.RouterGroup) {
 	rg.DELETE("/ask/threads/:id", h.ClearThread)
 	rg.GET("/ask/threads/:id/messages", h.ListMessages)
 	rg.POST("/ask/threads/:id/messages", h.SendMessage)
+	h.registerFeedback(rg)
 }
 
 // GetQuota handles GET /ask/quota.
diff --git a/apps/api/internal/handler/ask_feedback.go b/apps/api/internal/handler/ask_feedback.go
new file mode 100644
index 0000000..1ede326
--- /dev/null
+++ b/apps/api/internal/handler/ask_feedback.go
@@ -0,0 +1,67 @@
+package handler
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"github.com/google/uuid"
+
+	"github.com/yuxingu/digital-psychology/apps/api/internal/middleware"
+	asksvc "github.com/yuxingu/digital-psychology/apps/api/internal/service/ask"
+	"github.com/yuxingu/digital-psychology/apps/api/pkg/response"
+)
+
+func (h *AskHandler) registerFeedback(rg *gin.RouterGroup) {
+	rg.POST("/ask/threads/:id/feedback", h.SubmitFeedback)
+}
+
+// SubmitFeedback handles POST /ask/threads/:id/feedback.
+func (h *AskHandler) SubmitFeedback(c *gin.Context) {
+	userID, ok := middleware.UserIDFromContext(c)
+	if !ok {
+		response.Fail(c, http.StatusUnauthorized, 40100, "unauthorized")
+		return
+	}
+	threadID, err := uuid.Parse(c.Param("id"))
+	if err != nil {
+		response.Fail(c, http.StatusBadRequest, 10000, "invalid thread id")
+		return
+	}
+	var req struct {
+		Rating    int     `json:"rating"`
+		Tag       string  `json:"tag"`
+		Note      string  `json:"note"`
+		MessageID *string `json:"message_id"`
+	}
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.Fail(c, http.StatusBadRequest, 10000, "invalid request")
+		return
+	}
+	var msgID *uuid.UUID
+	if req.MessageID != nil && *req.MessageID != "" {
+		id, err := uuid.Parse(*req.MessageID)
+		if err != nil {
+			response.Fail(c, http.StatusBadRequest, 10000, "invalid message_id")
+			return
+		}
+		msgID = &id
+	}
+	row, err := h.Svc.SubmitFeedback(c.Request.Context(), userID, threadID, asksvc.SubmitFeedbackInput{
+		MessageID: msgID, Rating: req.Rating, Tag: req.Tag, Note: req.Note,
+	})
+	if err != nil {
+		msg := err.Error()
+		if strings.Contains(msg, "rating") || strings.Contains(msg, "tag") || strings.Contains(msg, "note") {
+			response.Fail(c, http.StatusBadRequest, 40000, msg)
+			return
+		}
+		if strings.Contains(msg, "thread not found") {
+			response.Fail(c, http.StatusNotFound, 40410, msg)
+			return
+		}
+		response.Fail(c, http.StatusInternalServerError, 50000, msg)
+		return
+	}
+	response.OK(c, row)
+}
diff --git a/apps/api/internal/integration/quality_feedback_test.go b/apps/api/internal/integration/quality_feedback_test.go
new file mode 100644
index 0000000..a773f0e
--- /dev/null
+++ b/apps/api/internal/integration/quality_feedback_test.go
@@ -0,0 +1,136 @@
+package integration_test
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"golang.org/x/crypto/bcrypt"
+)
+
+func TestQualityFeedback(t *testing.T) {
+	r, pool := setupAPIPool(t)
+	ctx := context.Background()
+	tok := adminLogin(t, r, "admin", "change-me")
+
+	_, code := doAdminJSON(t, r, http.MethodGet, "/api/v1/admin/ask/feedback", nil, "")
+	if code != http.StatusUnauthorized {
+		t.Fatalf("expected 401, got %d", code)
+	}
+
+	limitedRoleID := uuid.New()
+	_, err := pool.Exec(ctx, `
+		INSERT INTO admin_roles(id, name, system) VALUES ($1,$2,false)`,
+		limitedRoleID, "qf_lim_"+limitedRoleID.String()[:8])
+	if err != nil {
+		t.Fatal(err)
+	}
+	_, err = pool.Exec(ctx, `
+		INSERT INTO admin_role_permissions(role_id, code) VALUES ($1,'admin.ask.read')`, limitedRoleID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	hash, err := bcrypt.GenerateFromPassword([]byte("limited-pass"), bcrypt.DefaultCost)
+	if err != nil {
+		t.Fatal(err)
+	}
+	limUser := fmt.Sprintf("qflim_%d", time.Now().UnixNano())
+	_, err = pool.Exec(ctx, `
+		INSERT INTO admin_accounts(username, password_hash, role_id) VALUES ($1,$2,$3)`,
+		limUser, string(hash), limitedRoleID)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Cleanup(func() {
+		_, _ = pool.Exec(ctx, `DELETE FROM admin_accounts WHERE username=$1`, limUser)
+		_, _ = pool.Exec(ctx, `DELETE FROM admin_roles WHERE id=$1`, limitedRoleID)
+	})
+	limTok := adminLogin(t, r, limUser, "limited-pass")
+
+	key := mustRegister(t, r)
+	env, key := doJSON(t, r, http.MethodPost, "/api/v1/profiles", map[string]any{
+		"relation": "self", "birth_date": "1993-03-03", "display_name": "评",
+	}, key)
+	profileID := decodeData[map[string]any](t, env.Data)["id"].(string)
+	env, key = doJSON(t, r, http.MethodPost, "/api/v1/ask/threads", map[string]any{
+		"profile_id": profileID, "scene": "self",
+	}, key)
+	threadID := decodeData[map[string]any](t, env.Data)["id"].(string)
+	_, key = doJSON(t, r, http.MethodPost, "/api/v1/ask/threads/"+threadID+"/messages", map[string]any{
+		"content": "打分测试",
+	}, key)
+
+	_, code = doAdminJSON(t, r, http.MethodPost, "/api/v1/admin/ask/threads/"+threadID+"/feedback",
+		map[string]any{"rating": 4, "tag": "helpful"}, limTok)
+	if code != http.StatusForbidden {
+		t.Fatalf("expected 403 without feedback.write, got %d", code)
+	}
+
+	_, code = doAdminJSON(t, r, http.MethodPost, "/api/v1/admin/ask/threads/"+threadID+"/feedback",
+		map[string]any{"rating": 9}, tok)
+	if code != http.StatusBadRequest {
+		t.Fatalf("expected 400 bad rating, got %d", code)
+	}
+
+	env, code = doAdminJSON(t, r, http.MethodPost, "/api/v1/admin/ask/threads/"+threadID+"/feedback",
+		map[string]any{"rating": 5, "tag": "helpful", "note": "ops ok"}, tok)
+	if code != 200 {
+		t.Fatalf("admin feedback http=%d msg=%s", code, env.Message)
+	}
+
+	start := time.Now()
+	env, code = doAdminJSON(t, r, http.MethodGet, "/api/v1/admin/ask/feedback", nil, tok)
+	if code != 200 || time.Since(start) > 500*time.Millisecond {
+		t.Fatalf("list http=%d dur=%v", code, time.Since(start))
+	}
+	var list struct {
+		Items []struct {
+			ThreadID string `json:"thread_id"`
+			Source   string `json:"source"`
+			Rating   int    `json:"rating"`
+		} `json:"items"`
+	}
+	_ = json.Unmarshal(env.Data, &list)
+	found := false
+	for _, it := range list.Items {
+		if it.ThreadID == threadID && it.Source == "admin" && it.Rating == 5 {
+			found = true
+			break
+		}
+	}
+	if !found {
+		t.Fatalf("admin feedback missing: %#v", list.Items)
+	}
+
+	env, _, httpCode := doJSONExpect(t, r, http.MethodPost, "/api/v1/ask/threads/"+threadID+"/feedback",
+		map[string]any{"rating": 3, "tag": "other"}, key, 0)
+	if httpCode != 200 {
+		t.Fatalf("user feedback http=%d body=%s", httpCode, env.Data)
+	}
+
+	env, code = doAdminJSON(t, r, http.MethodGet, "/api/v1/admin/audit-logs", nil, tok)
+	if code != 200 {
+		t.Fatalf("audit %d", code)
+	}
+	var audit struct {
+		Items []struct {
+			Action string `json:"action"`
+		} `json:"items"`
+	}
+	_ = json.Unmarshal(env.Data, &audit)
+	okAudit := false
+	for _, it := range audit.Items {
+		if it.Action == "ask.feedback.create" {
+			okAudit = true
+			break
+		}
+	}
+	if !okAudit {
+		t.Fatal("missing ask.feedback.create audit")
+	}
+	_ = key
+}
diff --git a/apps/api/internal/repository/quality_feedback_repo.go b/apps/api/internal/repository/quality_feedback_repo.go
new file mode 100644
index 0000000..e15fc60
--- /dev/null
+++ b/apps/api/internal/repository/quality_feedback_repo.go
@@ -0,0 +1,170 @@
+package repository
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"time"
+	"unicode/utf8"
+
+	"github.com/google/uuid"
+	"github.com/jackc/pgx/v5"
+)
+
+// QualityFeedbackRow is AskOperations QualityFeedback.
+type QualityFeedbackRow struct {
+	ID             uuid.UUID  `json:"id"`
+	ThreadID       uuid.UUID  `json:"thread_id"`
+	MessageID      *uuid.UUID `json:"message_id,omitempty"`
+	Source         string     `json:"source"`
+	Rating         int        `json:"rating"`
+	Tag            *string    `json:"tag,omitempty"`
+	Note           *string    `json:"note,omitempty"`
+	CreatedByAdmin *uuid.UUID `json:"created_by_admin,omitempty"`
+	CreatedByUser  *uuid.UUID `json:"created_by_user,omitempty"`
+	CreatedAt      time.Time  `json:"created_at"`
+}
+
+// ListQualityFeedback returns recent feedback rows.
+func (r *AdminRepo) ListQualityFeedback(ctx context.Context, limit, offset int) ([]QualityFeedbackRow, error) {
+	if limit <= 0 || limit > 100 {
+		limit = 20
+	}
+	if offset < 0 {
+		offset = 0
+	}
+	rows, err := r.Pool.Query(ctx, `
+		SELECT id, thread_id, message_id, source, rating, tag, note,
+			created_by_admin, created_by_user, created_at
+		FROM ask_quality_feedback
+		ORDER BY created_at DESC
+		LIMIT $1 OFFSET $2`, limit, offset)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	return scanQualityFeedback(rows)
+}
+
+func scanQualityFeedback(rows pgx.Rows) ([]QualityFeedbackRow, error) {
+	var out []QualityFeedbackRow
+	for rows.Next() {
+		var f QualityFeedbackRow
+		if err := rows.Scan(
+			&f.ID, &f.ThreadID, &f.MessageID, &f.Source, &f.Rating, &f.Tag, &f.Note,
+			&f.CreatedByAdmin, &f.CreatedByUser, &f.CreatedAt,
+		); err != nil {
+			return nil, err
+		}
+		out = append(out, f)
+	}
+	return out, rows.Err()
+}
+
+// CreateAdminQualityFeedback inserts ops feedback + audit.
+func (r *AdminRepo) CreateAdminQualityFeedback(
+	ctx context.Context, adminID, threadID uuid.UUID, messageID *uuid.UUID, rating int, tag, note *string,
+) (*QualityFeedbackRow, error) {
+	if err := validateFeedback(rating, tag, note); err != nil {
+		return nil, err
+	}
+	tag, note = cleanTag(tag), cleanNote(note)
+	ok, err := r.askThreadExists(ctx, threadID)
+	if err != nil {
+		return nil, err
+	}
+	if !ok {
+		return nil, errors.New("ask thread not found")
+	}
+	tx, err := r.Pool.Begin(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback(ctx)
+	var f QualityFeedbackRow
+	err = tx.QueryRow(ctx, `
+		INSERT INTO ask_quality_feedback(thread_id, message_id, source, rating, tag, note, created_by_admin)
+		VALUES ($1,$2,'admin',$3,$4,$5,$6)
+		RETURNING id, thread_id, message_id, source, rating, tag, note, created_by_admin, created_by_user, created_at`,
+		threadID, messageID, rating, tag, note, adminID,
+	).Scan(&f.ID, &f.ThreadID, &f.MessageID, &f.Source, &f.Rating, &f.Tag, &f.Note,
+		&f.CreatedByAdmin, &f.CreatedByUser, &f.CreatedAt)
+	if err != nil {
+		return nil, err
+	}
+	meta, _ := json.Marshal(map[string]any{"rating": rating, "thread_id": threadID.String()})
+	if _, err := tx.Exec(ctx, `
+		INSERT INTO admin_audit_logs(admin_id, action, target_type, target_id, meta)
+		VALUES ($1,'ask.feedback.create','ask_thread',$2,$3)`,
+		adminID, threadID.String(), meta); err != nil {
+		return nil, err
+	}
+	if err := tx.Commit(ctx); err != nil {
+		return nil, err
+	}
+	return &f, nil
+}
+
+// CreateUserQualityFeedback inserts C-end feedback for owned thread.
+func (r *AskRepo) CreateUserQualityFeedback(
+	ctx context.Context, userID, threadID uuid.UUID, messageID *uuid.UUID, rating int, tag, note *string,
+) (*QualityFeedbackRow, error) {
+	if err := validateFeedback(rating, tag, note); err != nil {
+		return nil, err
+	}
+	tag, note = cleanTag(tag), cleanNote(note)
+	_, err := r.GetThreadForUser(ctx, userID, threadID)
+	if err != nil {
+		return nil, errors.New("ask thread not found")
+	}
+	var f QualityFeedbackRow
+	err = r.Pool.QueryRow(ctx, `
+		INSERT INTO ask_quality_feedback(thread_id, message_id, source, rating, tag, note, created_by_user)
+		VALUES ($1,$2,'user',$3,$4,$5,$6)
+		RETURNING id, thread_id, message_id, source, rating, tag, note, created_by_admin, created_by_user, created_at`,
+		threadID, messageID, rating, tag, note, userID,
+	).Scan(&f.ID, &f.ThreadID, &f.MessageID, &f.Source, &f.Rating, &f.Tag, &f.Note,
+		&f.CreatedByAdmin, &f.CreatedByUser, &f.CreatedAt)
+	return &f, err
+}
+
+func (r *AdminRepo) askThreadExists(ctx context.Context, threadID uuid.UUID) (bool, error) {
+	var n int
+	err := r.Pool.QueryRow(ctx, `
+		SELECT 1 FROM ask_threads WHERE id=$1 AND deleted_at IS NULL`, threadID).Scan(&n)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return false, nil
+	}
+	return err == nil, err
+}
+
+func validateFeedback(rating int, tag, note *string) error {
+	if rating < 1 || rating > 5 {
+		return errors.New("rating must be 1-5")
+	}
+	if tag != nil && *tag != "" {
+		switch *tag {
+		case "helpful", "off_topic", "unsafe", "other":
+		default:
+			return errors.New("invalid tag")
+		}
+	}
+	if note != nil && utf8.RuneCountInString(*note) > 500 {
+		return errors.New("note too long")
+	}
+	return nil
+}
+
+func cleanTag(tag *string) *string {
+	if tag == nil || *tag == "" {
+		return nil
+	}
+	return tag
+}
+
+func cleanNote(note *string) *string {
+	if note == nil || *note == "" {
+		return nil
+	}
+	return note
+}
diff --git a/apps/api/internal/service/admin/quality_feedback.go b/apps/api/internal/service/admin/quality_feedback.go
new file mode 100644
index 0000000..ad9951a
--- /dev/null
+++ b/apps/api/internal/service/admin/quality_feedback.go
@@ -0,0 +1,60 @@
+package admin
+
+import (
+	"context"
+	"strings"
+
+	"github.com/google/uuid"
+
+	"github.com/yuxingu/digital-psychology/apps/api/internal/repository"
+)
+
+var (
+	ErrBadFeedbackRating = errString("rating must be 1-5")
+	ErrBadFeedbackTag    = errString("invalid tag")
+	ErrFeedbackNoteLong  = errString("note too long")
+)
+
+// ListQualityFeedback lists recent QualityFeedback.
+func (s *Service) ListQualityFeedback(ctx context.Context, limit, offset int) ([]repository.QualityFeedbackRow, error) {
+	items, err := s.Repo.ListQualityFeedback(ctx, limit, offset)
+	if err != nil {
+		return nil, err
+	}
+	if items == nil {
+		items = []repository.QualityFeedbackRow{}
+	}
+	return items, nil
+}
+
+// CreateQualityFeedback is ops-submitted feedback.
+func (s *Service) CreateQualityFeedback(
+	ctx context.Context, adminID, threadID uuid.UUID, messageID *uuid.UUID, rating int, tag, note string,
+) (*repository.QualityFeedbackRow, error) {
+	var tagPtr, notePtr *string
+	if strings.TrimSpace(tag) != "" {
+		t := strings.TrimSpace(tag)
+		tagPtr = &t
+	}
+	if strings.TrimSpace(note) != "" {
+		n := strings.TrimSpace(note)
+		notePtr = &n
+	}
+	row, err := s.Repo.CreateAdminQualityFeedback(ctx, adminID, threadID, messageID, rating, tagPtr, notePtr)
+	if err == nil {
+		return row, nil
+	}
+	msg := err.Error()
+	switch {
+	case strings.Contains(msg, "rating"):
+		return nil, ErrBadFeedbackRating
+	case strings.Contains(msg, "tag"):
+		return nil, ErrBadFeedbackTag
+	case strings.Contains(msg, "note"):
+		return nil, ErrFeedbackNoteLong
+	case strings.Contains(msg, "thread not found"):
+		return nil, ErrAskThreadNotFound
+	default:
+		return nil, err
+	}
+}
diff --git a/apps/api/internal/service/admin/rbac.go b/apps/api/internal/service/admin/rbac.go
index f85e5c1..bfade24 100644
--- a/apps/api/internal/service/admin/rbac.go
+++ b/apps/api/internal/service/admin/rbac.go
@@ -25,6 +25,7 @@ const (
 	PermMembershipCodesRead  = "admin.membership.codes.read"
 	PermMembershipCodesWrite = "admin.membership.codes.write"
 	PermAskRead              = "admin.ask.read"
+	PermAskFeedbackWrite     = "admin.ask.feedback.write"
 	PermContentSafetyRead    = "admin.content_safety.read"
 )
 
@@ -34,7 +35,7 @@ var knownPermissions = map[string]struct{}{
 	PermContentWrite: {}, PermRolesRead: {}, PermRolesWrite: {},
 	PermUsersStatusWrite: {}, PermMembershipPlansRead: {}, PermMembershipPlansWrite: {},
 	PermMembershipCodesRead: {}, PermMembershipCodesWrite: {},
-	PermAskRead: {}, PermContentSafetyRead: {},
+	PermAskRead: {}, PermAskFeedbackWrite: {}, PermContentSafetyRead: {},
 }
 
 var (
diff --git a/apps/api/internal/service/ask/feedback.go b/apps/api/internal/service/ask/feedback.go
new file mode 100644
index 0000000..b374baa
--- /dev/null
+++ b/apps/api/internal/service/ask/feedback.go
@@ -0,0 +1,42 @@
+package ask
+
+import (
+	"context"
+	"errors"
+	"strings"
+
+	"github.com/google/uuid"
+
+	"github.com/yuxingu/digital-psychology/apps/api/internal/repository"
+)
+
+// SubmitFeedbackInput for C-end QualityFeedback.
+type SubmitFeedbackInput struct {
+	MessageID *uuid.UUID
+	Rating    int
+	Tag       string
+	Note      string
+}
+
+// SubmitFeedback records user QualityFeedback on owned thread.
+func (s *Service) SubmitFeedback(ctx context.Context, userID, threadID uuid.UUID, in SubmitFeedbackInput) (*repository.QualityFeedbackRow, error) {
+	var tagPtr, notePtr *string
+	if t := strings.TrimSpace(in.Tag); t != "" {
+		tagPtr = &t
+	}
+	if n := strings.TrimSpace(in.Note); n != "" {
+		notePtr = &n
+	}
+	row, err := s.Ask.CreateUserQualityFeedback(ctx, userID, threadID, in.MessageID, in.Rating, tagPtr, notePtr)
+	if err == nil {
+		return row, nil
+	}
+	msg := err.Error()
+	if strings.Contains(msg, "rating") || strings.Contains(msg, "tag") || strings.Contains(msg, "note") {
+		return nil, errors.New(msg)
+	}
+	if strings.Contains(msg, "thread not found") {
+		return nil, errors.New("ask thread not found")
+	}
+	return nil, err
+}
diff --git a/apps/api/migrations/000021_ask_quality_feedback.down.sql b/apps/api/migrations/000021_ask_quality_feedback.down.sql
new file mode 100644
index 0000000..a05568b
--- /dev/null
+++ b/apps/api/migrations/000021_ask_quality_feedback.down.sql
@@ -0,0 +1,4 @@
+-- ECR-020 down
+
+DELETE FROM admin_role_permissions WHERE code = 'admin.ask.feedback.write';
+DROP TABLE IF EXISTS ask_quality_feedback;
diff --git a/apps/api/migrations/000021_ask_quality_feedback.up.sql b/apps/api/migrations/000021_ask_quality_feedback.up.sql
new file mode 100644
index 0000000..e7197b1
--- /dev/null
+++ b/apps/api/migrations/000021_ask_quality_feedback.up.sql
@@ -0,0 +1,23 @@
+-- ECR-020 QualityFeedback
+
+CREATE TABLE IF NOT EXISTS ask_quality_feedback (
+  id uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+  thread_id uuid NOT NULL REFERENCES ask_threads(id),
+  message_id uuid NULL REFERENCES ask_messages(id),
+  source varchar(16) NOT NULL CHECK (source IN ('admin','user')),
+  rating smallint NOT NULL CHECK (rating >= 1 AND rating <= 5),
+  tag varchar(32) NULL CHECK (tag IS NULL OR tag IN ('helpful','off_topic','unsafe','other')),
+  note text NULL,
+  created_by_admin uuid NULL REFERENCES admin_accounts(id),
+  created_by_user uuid NULL REFERENCES users(id),
+  created_at timestamptz NOT NULL DEFAULT now()
+);
+
+CREATE INDEX IF NOT EXISTS idx_ask_qf_thread ON ask_quality_feedback(thread_id);
+CREATE INDEX IF NOT EXISTS idx_ask_qf_created ON ask_quality_feedback(created_at DESC);
+
+INSERT INTO admin_role_permissions(role_id, code)
+SELECT r.id, 'admin.ask.feedback.write'
+FROM admin_roles r
+WHERE r.name = 'super_admin'
+ON CONFLICT DO NOTHING;
diff --git a/docs/BACKEND_DESIGN/BD-2026-020-quality-feedback.md b/docs/BACKEND_DESIGN/BD-2026-020-quality-feedback.md
new file mode 100644
index 0000000..937cd6f
--- /dev/null
+++ b/docs/BACKEND_DESIGN/BD-2026-020-quality-feedback.md
@@ -0,0 +1,26 @@
+# Backend Design: ECR-020 QualityFeedback
+
+| ID | BD-2026-020 |
+| Status | Approved |
+| Coding | Loop authorized |
+| Level | L2 |
+| Migration | YES 000021 |
+
+## Backend Change Boundary
+
+```text
+Domain: QualityFeedback
+App: AdminHandler + AskHandler → services → repos
+API: GET /admin/ask/feedback
+     POST /admin/ask/threads/{id}/feedback
+     POST /ask/threads/{id}/feedback
+Permission: admin.ask.read · admin.ask.feedback.write
+Migration: 000021
+UI: admin-h5 /ask feedback panel
+```
+
+## Out of boundary
+
+Message mutation · SystemPrompt · UGC plaza · Payment
+
+Rollback: down migration + remove routes/UI
diff --git a/docs/CHANGELOG.md b/docs/CHANGELOG.md
index 95c20ca..62c71b5 100644
--- a/docs/CHANGELOG.md
+++ b/docs/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ## 2026-08-07
 
+- **ECR-020 Closed**：QualityFeedback（`ask_quality_feedback` · admin/user 评分 · migration 000021）  
 - **ECR-019 Closed**：ContentSafety FilterRule（`filter_rules` · evaluate · admin-h5 `/safety` · migration 000020）  
 - **ECR-018 Closed**：Entitlement（`GET /admin/users/:id/entitlements` · admin-h5 权益 Tab · Migration NO）  
 - **ECR-017 Closed**：AskOperations（AskSessionView 只读 · `admin.ask.read` · admin-h5 `/ask` · migration 000019）  
diff --git a/docs/CODE_REVIEW/ECR-020.md b/docs/CODE_REVIEW/ECR-020.md
new file mode 100644
index 0000000..48ae388
--- /dev/null
+++ b/docs/CODE_REVIEW/ECR-020.md
@@ -0,0 +1,8 @@
+# CODE_REVIEW — ECR-020
+
+**Verdict:** Approve → Closed
+
+Date: 2026-08-07 · Loop continuous
+
+- QualityFeedback 表 + admin/user API；无消息改写  
+- Audit on admin create · Integration AC mapped
diff --git a/docs/CONTRACT_DIFF/ECR-020.yaml b/docs/CONTRACT_DIFF/ECR-020.yaml
new file mode 100644
index 0000000..f59126b
--- /dev/null
+++ b/docs/CONTRACT_DIFF/ECR-020.yaml
@@ -0,0 +1,26 @@
+ecr: ECR-020
+capability: AskOperations
+bounded_context: Ask_Ops
+parent: WAVE0-FROZEN
+predecessor: ECR-019
+change:
+  type: additive
+breaking_change: false
+migration_required: true
+compatibility_notes: >
+  Adds ask_quality_feedback and admin/user feedback APIs.
+  No message body mutation.
+
+apis:
+  - method: GET
+    path: /api/v1/admin/ask/feedback
+    change: added
+  - method: POST
+    path: /api/v1/admin/ask/threads/{id}/feedback
+    change: added
+  - method: POST
+    path: /api/v1/ask/threads/{id}/feedback
+    change: added
+perms:
+  - code: admin.ask.feedback.write
+    change: added
diff --git a/docs/ECR/ECR-020-quality-feedback.md b/docs/ECR/ECR-020-quality-feedback.md
new file mode 100644
index 0000000..2b13331
--- /dev/null
+++ b/docs/ECR/ECR-020-quality-feedback.md
@@ -0,0 +1,19 @@
+# ECR-020
+
+**Title:** QualityFeedback（问答质量反馈薄切片）  
+**Status:** **Closed**  
+**Closed:** 2026-08-07（Loop continuous）  
+**Parent:** WAVE0-FROZEN · **Predecessor:** ECR-019 Closed  
+**Change Level:** L2  
+
+## Change
+
+`ask_quality_feedback`；运营 list/create · C 端评分；admin-h5 问答页反馈区。  
+
+## Forbidden
+
+改消息 · Prompt 配置 · UGC · 真支付  
+
+## Linked
+
+Spec `ops-quality-feedback.md` · BD-2026-020 · CONTRACT_DIFF/ECR-020.yaml · TEST_REPORT/ECR-020.md
diff --git a/docs/ENGINEERING_SPEC/ECR-020-quality-feedback.md b/docs/ENGINEERING_SPEC/ECR-020-quality-feedback.md
new file mode 100644
index 0000000..404adea
--- /dev/null
+++ b/docs/ENGINEERING_SPEC/ECR-020-quality-feedback.md
@@ -0,0 +1,6 @@
+# ENGINEERING_SPEC — ECR-020
+
+1. migration 000021 ask_quality_feedback + perm  
+2. Admin + Ask feedback APIs  
+3. admin-h5 Ask 页反馈区  
+4. Integration · Closed  
diff --git a/docs/HANDOFF/ECR-020-architect-to-engineer.md b/docs/HANDOFF/ECR-020-architect-to-engineer.md
new file mode 100644
index 0000000..b0f60e0
--- /dev/null
+++ b/docs/HANDOFF/ECR-020-architect-to-engineer.md
@@ -0,0 +1,3 @@
+# HANDOFF — ECR-020 Architect → Engineer
+
+Loop continuous · Approved + Coding. Migration 000021. Forbidden: 改消息/UGC/真支付.
diff --git a/docs/HANDOFF/ECR-020-engineer-to-reviewer.md b/docs/HANDOFF/ECR-020-engineer-to-reviewer.md
new file mode 100644
index 0000000..12a0636
--- /dev/null
+++ b/docs/HANDOFF/ECR-020-engineer-to-reviewer.md
@@ -0,0 +1,3 @@
+# HANDOFF — ECR-020 Engineer → Reviewer
+
+TestQualityFeedback PASS · Ask 页反馈 · Ready for Closed.
diff --git a/docs/PRODUCT_SPEC/ECR-020-quality-feedback.md b/docs/PRODUCT_SPEC/ECR-020-quality-feedback.md
new file mode 100644
index 0000000..c9cd631
--- /dev/null
+++ b/docs/PRODUCT_SPEC/ECR-020-quality-feedback.md
@@ -0,0 +1,3 @@
+# PRODUCT_SPEC — ECR-020
+
+对齐 ops-quality-feedback.md · Approved · Loop · L2 · QualityFeedback
diff --git a/docs/STATE/ECR-020.md b/docs/STATE/ECR-020.md
new file mode 100644
index 0000000..26bb98f
--- /dev/null
+++ b/docs/STATE/ECR-020.md
@@ -0,0 +1,6 @@
+# STATE — ECR-020
+
+| Status | **Closed** |
+| Phase | closed |
+| Spec | ops-quality-feedback.md |
+| Updated | 2026-08-07 |
diff --git a/docs/TASKS/TASK-020-ECR020.yaml b/docs/TASKS/TASK-020-ECR020.yaml
new file mode 100644
index 0000000..7d32997
--- /dev/null
+++ b/docs/TASKS/TASK-020-ECR020.yaml
@@ -0,0 +1,11 @@
+id: TASK-020-ECR020
+ecr: ECR-020
+title: QualityFeedback implement
+role: engineer
+status: closed
+change_level: L2
+parent: WAVE0-FROZEN
+predecessor: ECR-019
+acceptance:
+  - Spec AC mapped
+  - No message rewrite / UGC / payment
diff --git a/docs/TEST_REPORT/ECR-020.md b/docs/TEST_REPORT/ECR-020.md
new file mode 100644
index 0000000..07b55b2
--- /dev/null
+++ b/docs/TEST_REPORT/ECR-020.md
@@ -0,0 +1,32 @@
+# TEST_REPORT — ECR-020 QualityFeedback
+
+Date: 2026-08-07 · Loop continuous · commit: (pending)
+
+## Commands
+
+```bash
+cd apps/api && go test ./internal/integration/ -run TestQualityFeedback -count=1
+npm run build:admin
+python3 scripts/ess-validate.py --phase review --ecr ECR-020
+python3 scripts/ess-gate-check.py --ecr ECR-020
+```
+
+## Results
+
+| Check | Result |
+|-------|--------|
+| TestQualityFeedback | PASS |
+| build:admin | PASS |
+| ess-validate review | PASS |
+
+## AC
+
+| ID | Evidence |
+|----|----------|
+| AC-F-01 | admin POST → list 可见 |
+| AC-F-02 | user POST → 200 |
+| AC-F-03 | rating=9 → 400 |
+| AC-S-01 | 无 token list → 401 |
+| AC-S-02 | 仅 ask.read POST → 403 |
+| AC-P-01 | list &lt; 500ms |
+| AC-O-01 | AuditLog ask.feedback.create |
diff --git a/docs/TRACEABILITY.md b/docs/TRACEABILITY.md
index ef1e114..1858d4a 100644
--- a/docs/TRACEABILITY.md
+++ b/docs/TRACEABILITY.md
@@ -24,3 +24,4 @@
 | ECR-017 | AskOperations | **Closed** | Spec ops-ask-operations · BD-2026-017 · migration 000019 · TEST_REPORT · CODE_REVIEW · Loop continuous |
 | ECR-018 | Entitlement | **Closed** | Spec ops-entitlement · BD-2026-018 · TEST_REPORT · CODE_REVIEW · Loop continuous |
 | ECR-019 | ContentSafety | **Closed** | Spec ops-content-safety · BD-2026-019 · migration 000020 · TEST_REPORT · CODE_REVIEW · Loop continuous |
+| ECR-020 | QualityFeedback | **Closed** | Spec ops-quality-feedback · BD-2026-020 · migration 000021 · TEST_REPORT · CODE_REVIEW · Loop continuous |
diff --git a/docs/WAVE0/LOOP_AUTHORIZATION.md b/docs/WAVE0/LOOP_AUTHORIZATION.md
index ef9045e..ce02a22 100644
--- a/docs/WAVE0/LOOP_AUTHORIZATION.md
+++ b/docs/WAVE0/LOOP_AUTHORIZATION.md
@@ -30,4 +30,4 @@ Human 明文：**直接用 Loop，不用人工确认。**
 
 | Done | Next |
 |------|------|
-| ECR-013A…019 Closed | **ECR-020** QualityFeedback 薄切片（或 AICoreConfig）；禁真支付/UGC |
+| ECR-013A…020 Closed | **ECR-021** AICoreConfig 薄切片（SystemPrompt 只读优先）；禁真支付/UGC |
diff --git a/proto/openapi.yaml b/proto/openapi.yaml
index 3e340fc..3f3a227 100644
--- a/proto/openapi.yaml
+++ b/proto/openapi.yaml
@@ -461,6 +461,72 @@ paths:
         '200':
           description: OK
 
+  /api/v1/admin/ask/feedback:
+    get:
+      tags: [admin]
+      summary: List QualityFeedback
+      description: Requires admin.ask.read
+      responses:
+        '200':
+          description: OK
+        '401':
+          description: Unauthorized
+
+  /api/v1/admin/ask/threads/{id}/feedback:
+    post:
+      tags: [admin]
+      summary: Create QualityFeedback (ops)
+      description: Requires admin.ask.feedback.write; writes AuditLog
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema: { type: string, format: uuid }
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [rating]
+              properties:
+                rating: { type: integer, minimum: 1, maximum: 5 }
+                tag: { type: string, enum: [helpful, off_topic, unsafe, other] }
+                note: { type: string }
+                message_id: { type: string, format: uuid }
+      responses:
+        '200':
+          description: OK
+        '400':
+          description: Invalid
+        '403':
+          description: Forbidden
+
+  /api/v1/ask/threads/{id}/feedback:
+    post:
+      tags: [ask]
+      summary: User QualityFeedback on owned thread
+      parameters:
+        - in: path
+          name: id
+          required: true
+          schema: { type: string, format: uuid }
+      requestBody:
+        required: true
+        content:
+          application/json:
+            schema:
+              type: object
+              required: [rating]
+              properties:
+                rating: { type: integer, minimum: 1, maximum: 5 }
+                tag: { type: string }
+                note: { type: string }
+                message_id: { type: string, format: uuid }
+      responses:
+        '200':
+          description: OK
+
   /api/v1/admin/orders:
     get:
       tags: [admin]