fix(memory): honor empty extraction results

Retry a service-account page once in a fresh session when the first run omits its required current-run thumbnail; notify only after the retry also fails.

conversation-memory.mjs

@@ -109,6 +109,7 @@ function buildMemoryPrompt(messages) {
     '你是 TKMind 的用户长期记忆提取器。',
     '请从下面的用户对话中提取可以长期复用的个人记忆。',
     '只记录用户明确表达或强证据支持的信息，不要猜测，不要记录临时闲聊。',
+    '不要把问题、请求、指令或待办本身当作用户事实；问句没有提供答案时不要记录。',
     '不要记录密码、密钥、身份证、手机号、银行卡等敏感信息。',
     '只返回 JSON 对象，不要 Markdown，不要解释。',
     '格式：{"memories":[{"label":"preference|habit|interest|goal|fact|experience|knowledge","text":"一句完整中文记忆","confidence":0.0-1.0}]}',
@@ -382,7 +383,9 @@ export function createConversationMemoryService(pool, options = {}) {
         warnLlmExtractionFailed(err);
       }
     }
-    if (!memories?.length) memories = fallbackMemoriesFromMessages(messages);
+    // An empty array is an authoritative LLM decision that the batch contains no
+    // durable memory. Only fall back when extraction was unavailable (`null`).
+    if (memories == null) memories = fallbackMemoriesFromMessages(messages);
     const stored = await storeMemories(userId, messages, memories);
     await markAnalyzed(messages.map((message) => message.id));
     return { ok: true, analyzed: messages.length, memories: stored };

conversation-memory.test.mjs

@@ -208,6 +208,35 @@ test('saveAndAnalyze marks messages analyzed when llm extraction fails and no me
   else process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = previous;
 });
 
+test('saveAndAnalyze still uses fallback when llm extraction is unavailable', async () => {
+  const previous = process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
+  process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = '1';
+  const pool = createPool();
+  const service = createConversationMemoryService(pool, {
+    now: () => 2250,
+    llmProviderService: {
+      async createChatCompletion() {
+        throw new Error('upstream unavailable');
+      },
+    },
+  });
+
+  const result = await service.saveAndAnalyze('session-fallback', 'user-fallback', [
+    {
+      id: 'm-fallback',
+      role: 'user',
+      content: [{ type: 'text', text: '我喜欢简洁的回答。' }],
+      metadata: { userVisible: true },
+    },
+  ]);
+
+  assert.equal(result.memories, 1);
+  assert.match(pool.state.memories[0].memory_text, /简洁/);
+
+  if (previous == null) delete process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
+  else process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = previous;
+});
+
 test('saveAndAnalyze uses admin effective env for memory extraction model', async () => {
   const previous = process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
   process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = '1';
@@ -284,6 +313,40 @@ test('saveAndAnalyze extracts memories through llmProviderService', async () =>
   else process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = previous;
 });
 
+test('saveAndAnalyze respects an empty llm result instead of storing a question through fallback', async () => {
+  const previous = process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
+  process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = '1';
+  const pool = createPool();
+  const service = createConversationMemoryService(pool, {
+    now: () => 2750,
+    llmProviderService: {
+      async createChatCompletion({ messages }) {
+        assert.match(String(messages?.[0]?.content ?? ''), /问句没有提供答案时不要记录/);
+        return {
+          ok: true,
+          reply: JSON.stringify({ memories: [] }),
+        };
+      },
+    },
+  });
+
+  const result = await service.saveAndAnalyze('session-question', 'user-question', [
+    {
+      id: 'm-question',
+      role: 'user',
+      content: [{ type: 'text', text: '用户记住的记忆召回灰度测试代号是什么？' }],
+      metadata: { userVisible: true },
+    },
+  ]);
+
+  assert.equal(result.analyzed, 1);
+  assert.equal(result.memories, 0);
+  assert.equal(pool.state.memories.length, 0);
+
+  if (previous == null) delete process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
+  else process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = previous;
+});
+
 test('saveAndAnalyze throttles repeated llm extraction warnings', async () => {
   const previous = process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED;
   process.env.USER_CONVERSATION_MEMORY_LLM_ENABLED = '1';

conversation-repair.mjs

@@ -47,6 +47,117 @@ export function filterUserVisibleConversation(messages) {
   return messages.filter((message) => message?.metadata?.userVisible !== false);
 }
 
+export function parseAgentRunUserMessage(row) {
+  const raw = row?.user_message_json ?? row?.userMessageJson;
+  let parsed = raw;
+  if (typeof raw === 'string') {
+    try {
+      parsed = JSON.parse(raw);
+    } catch {
+      return null;
+    }
+  }
+  if (!parsed || typeof parsed !== 'object' || Array.isArray(parsed)) return null;
+  const message = {
+    ...parsed,
+    role: 'user',
+    metadata: {
+      ...(parsed.metadata && typeof parsed.metadata === 'object' ? parsed.metadata : {}),
+      userVisible: true,
+      agentVisible: true,
+      memoryInputSource: 'agent-run-original',
+    },
+  };
+  return extractConversationMessageText(message) ? message : null;
+}
+
+export function restoreConversationUserMessagesFromAgentRunRows(messages, runRows) {
+  const conversation = Array.isArray(messages) ? messages : [];
+  const originals = (Array.isArray(runRows) ? runRows : [])
+    .map((row) => parseAgentRunUserMessage(row))
+    .filter(Boolean);
+  if (originals.length === 0) return conversation;
+
+  const userIndexes = conversation
+    .map((message, index) => (message?.role === 'user' ? index : -1))
+    .filter((index) => index >= 0);
+  if (userIndexes.length === 0) return conversation;
+
+  const restored = [...conversation];
+  let userOffset = userIndexes.length - 1;
+  let originalOffset = originals.length - 1;
+  while (userOffset >= 0 && originalOffset >= 0) {
+    const messageIndex = userIndexes[userOffset];
+    const current = restored[messageIndex] ?? {};
+    const original = originals[originalOffset];
+    restored[messageIndex] = {
+      ...current,
+      role: 'user',
+      content: original.content,
+      metadata: {
+        ...(current.metadata && typeof current.metadata === 'object' ? current.metadata : {}),
+        ...(original.metadata && typeof original.metadata === 'object' ? original.metadata : {}),
+        userVisible: current?.metadata?.userVisible ?? true,
+        agentVisible: current?.metadata?.agentVisible ?? true,
+        memoryInputSource: 'agent-run-original',
+      },
+    };
+    userOffset -= 1;
+    originalOffset -= 1;
+  }
+  return restored;
+}
+
+export async function loadSuccessfulAgentRunUserMessageRows(
+  pool,
+  sessionId,
+  userId,
+  { limit = 200 } = {},
+) {
+  if (!pool || !sessionId || !userId) return [];
+  const resolvedLimit = Math.max(1, Math.min(200, Number(limit) || 200));
+  const [rows] = await pool.query(
+    `SELECT id, user_message_json, created_at
+       FROM h5_agent_runs
+      WHERE agent_session_id = ?
+        AND user_id = ?
+        AND status = 'succeeded'
+      ORDER BY created_at DESC, id DESC
+      LIMIT ?`,
+    [sessionId, userId, resolvedLimit],
+  );
+  return [...rows].reverse();
+}
+
+export async function restoreConversationUserMessagesFromAgentRuns(pool, messages, sessionId, userId) {
+  const userMessageCount = Array.isArray(messages)
+    ? messages.filter((message) => message?.role === 'user').length
+    : 0;
+  if (userMessageCount === 0) return Array.isArray(messages) ? messages : [];
+  const rows = await loadSuccessfulAgentRunUserMessageRows(pool, sessionId, userId, {
+    limit: userMessageCount,
+  });
+  return restoreConversationUserMessagesFromAgentRunRows(messages, rows);
+}
+
+export async function restoreConversationUserMessagesFromAgentRunsFailOpen(
+  pool,
+  messages,
+  sessionId,
+  userId,
+  { logger = console } = {},
+) {
+  try {
+    return await restoreConversationUserMessagesFromAgentRuns(pool, messages, sessionId, userId);
+  } catch (err) {
+    logger?.warn?.(
+      '[memory-v2] original agent-run transcript unavailable; using visible session transcript:',
+      err instanceof Error ? err.message : err,
+    );
+    return Array.isArray(messages) ? messages : [];
+  }
+}
+
 export function countNonEmptyConversationMessages(messages) {
   if (!Array.isArray(messages)) return 0;
   return messages.filter((message) => {

conversation-repair.test.mjs

@@ -5,8 +5,12 @@ import {
   buildConversationFromDbRows,
   countNonEmptyConversationMessages,
   filterUserVisibleConversation,
+  parseAgentRunUserMessage,
   parseStoredConversationRow,
   repairConversationFromDbRows,
+  restoreConversationUserMessagesFromAgentRunRows,
+  restoreConversationUserMessagesFromAgentRuns,
+  restoreConversationUserMessagesFromAgentRunsFailOpen,
   shouldRepairConversationFromDb,
 } from './conversation-repair.mjs';
 
@@ -97,3 +101,78 @@ test('filterUserVisibleConversation keeps messages without explicit userVisible
   assert.equal(visible[0].role, 'user');
   assert.equal(visible[1].role, 'assistant');
 });
+
+test('parseAgentRunUserMessage keeps the original user text for memory extraction', () => {
+  const parsed = parseAgentRunUserMessage({
+    user_message_json: JSON.stringify({
+      role: 'user',
+      content: [{ type: 'text', text: '请记住灰度代号 MEM-NEW' }],
+      metadata: { userVisible: true },
+    }),
+  });
+  assert.equal(parsed.content[0].text, '请记住灰度代号 MEM-NEW');
+  assert.equal(parsed.metadata.memoryInputSource, 'agent-run-original');
+});
+
+test('restoreConversationUserMessagesFromAgentRunRows removes injected memory context', () => {
+  const messages = [
+    {
+      id: 'upstream-user-1',
+      role: 'user',
+      content: [{ type: 'text', text: '【Memind 任务编排】\n[Memory Context]\n- 旧记忆\n用户任务：\n请记住灰度代号 MEM-NEW' }],
+      metadata: { userVisible: true, agentVisible: true },
+    },
+    gooseMsg('assistant-1', 'assistant', '已记住'),
+  ];
+  const restored = restoreConversationUserMessagesFromAgentRunRows(messages, [{
+    user_message_json: JSON.stringify({
+      role: 'user',
+      content: [{ type: 'text', text: '请记住灰度代号 MEM-NEW' }],
+      metadata: { userVisible: true, agentVisible: true },
+    }),
+  }]);
+  assert.equal(restored[0].id, 'upstream-user-1');
+  assert.equal(restored[0].content[0].text, '请记住灰度代号 MEM-NEW');
+  assert.doesNotMatch(restored[0].content[0].text, /旧记忆|Memory Context/);
+  assert.equal(restored[1].content[0].text, '已记住');
+});
+
+test('restoreConversationUserMessagesFromAgentRuns scopes successful runs by session and user', async () => {
+  const calls = [];
+  const pool = {
+    async query(sql, params) {
+      calls.push({ sql, params });
+      return [[{
+        user_message_json: JSON.stringify({
+          role: 'user',
+          content: [{ type: 'text', text: '原始用户消息' }],
+        }),
+      }]];
+    },
+  };
+  const restored = await restoreConversationUserMessagesFromAgentRuns(
+    pool,
+    [gooseMsg('user-1', 'user', '编排后的消息')],
+    'session-1',
+    'user-1',
+  );
+  assert.match(calls[0].sql, /status = 'succeeded'/);
+  assert.match(calls[0].sql, /ORDER BY created_at DESC/);
+  assert.match(calls[0].sql, /LIMIT \?/);
+  assert.deepEqual(calls[0].params, ['session-1', 'user-1', 1]);
+  assert.equal(restored[0].content[0].text, '原始用户消息');
+});
+
+test('restoreConversationUserMessagesFromAgentRunsFailOpen preserves the visible transcript', async () => {
+  const warnings = [];
+  const messages = [gooseMsg('user-1', 'user', '可见会话原文')];
+  const restored = await restoreConversationUserMessagesFromAgentRunsFailOpen(
+    { async query() { throw new Error('agent run query unavailable'); } },
+    messages,
+    'session-1',
+    'user-1',
+    { logger: { warn: (...items) => warnings.push(items.join(' ')) } },
+  );
+  assert.equal(restored, messages);
+  assert.match(warnings[0], /agent run query unavailable/);
+});

docs/regression-guards/memory-v2-candidate-and-lifecycle.md

@@ -13,6 +13,18 @@
 `updated_at=0` 游标开始做有限批次 backfill，新写入行可能长期排在批次之外。结果是
 `agent_memory_resolved` 显示已注入，但回答只拿到旧的无关记忆。
 
+首次修复同步后，灰度又发现 `remember-recent` 读取的是 Agent 编排后的会话文本，其中
+包含已注入的 `[Memory Context]`。提取器因此可能把旧记忆再次沉淀，而忽略用户本轮明确
+要求保存的内容，形成旧记忆自我复制。
+
+提取器返回 `{"memories":[]}` 时，旧逻辑仍会触发规则回退，可能把“……是什么”一类
+问句误存为事实。空数组必须视为成功的“无需保存”判断；只有提取不可用并返回 `null`
+时才允许规则回退。
+
+当前生产使用的本地 hash embedding 只有 3 维，且连续中文可能被视为单个 token。即使正确
+记忆已进入 pgvector，它也可能排在向量 Top-K 之外。因此 pgvector 读取必须合并有界的
+向量候选与最近候选，再以中文字符 n-gram 查询覆盖率重排；无词法重合时保持向量排序。
+
 ## 必须保留的行为
 
 1. `MEMORY_CANDIDATE_PERSISTENCE_ENABLED=1` 且 MySQL 可用时，Portal 必须先执行
@@ -28,11 +40,18 @@
 6. 用户记忆 `write/compact` 成功后，必须在返回前按 `userId + sessionId` 将本次活跃记忆
    幂等 upsert 到 pgvector；候选晋升成功后也必须按实际晋升用户同步。不得依赖从零开始
    的全局有限批次 backfill 来保证新记忆可立即召回。
+7. 显式记忆提取必须优先使用同一用户、同一会话中已成功 `h5_agent_runs.user_message_json`
+   保存的原始用户消息。不得把 Agent 编排提示或 `[Memory Context]` 当作用户的新记忆；
+   原始消息查询失败时必须 fail-open 到现有可见会话，不能阻塞保存接口。
+8. pgvector 召回必须同时覆盖有界向量候选和有界最近候选，去重后只返回请求的 limit；
+   中文词法重排用于弥补低维本地 hash 的排序缺陷，且候选池上限不得超过 100。
+9. LLM 提取明确返回空数组时不得再走规则回退；提取提示必须明确排除没有提供答案的
+   问题、请求、指令和待办，避免把问句本身沉淀为长期记忆。
 
 ## 回归检查
 
 ```bash
-node --test memory-v2-personal-store.test.mjs memory-v2-lifecycle.test.mjs \
+node --test conversation-memory.test.mjs conversation-repair.test.mjs memory-v2-personal-store.test.mjs memory-v2-lifecycle.test.mjs \
   memory-v2-pgvector-backfill.test.mjs memory-v2-runtime.test.mjs
 npm test
 ```

memory-v2-pgvector.mjs

@@ -24,6 +24,43 @@ function vectorLiteral(embedding) {
   return `[${embedding.join(',')}]`;
 }
 
+function normalizeSearchText(value) {
+  return String(value ?? '')
+    .normalize('NFKC')
+    .toLowerCase()
+    .replace(/[^a-z0-9\u4e00-\u9fff]+/gu, '');
+}
+
+function buildCharacterNgrams(value, size = 2) {
+  const text = normalizeSearchText(value);
+  if (!text) return new Set();
+  if (text.length <= size) return new Set([text]);
+  const grams = new Set();
+  for (let index = 0; index <= text.length - size; index += 1) {
+    grams.add(text.slice(index, index + size));
+  }
+  return grams;
+}
+
+function lexicalQueryCoverage(query, text) {
+  const queryGrams = buildCharacterNgrams(query);
+  if (queryGrams.size === 0) return 0;
+  const textGrams = buildCharacterNgrams(text);
+  let overlap = 0;
+  for (const gram of queryGrams) {
+    if (textGrams.has(gram)) overlap += 1;
+  }
+  return overlap / queryGrams.size;
+}
+
+function timestampValue(value) {
+  if (value == null) return 0;
+  const numeric = Number(value);
+  if (Number.isFinite(numeric)) return numeric;
+  const parsed = Date.parse(String(value));
+  return Number.isFinite(parsed) ? parsed : 0;
+}
+
 function normalizeRow(row) {
   const text = String(row?.content ?? row?.memory_text ?? row?.text ?? '').trim();
   if (!text) return null;
@@ -33,9 +70,38 @@ function normalizeRow(row) {
     text,
     score: row?.score == null ? null : Number(row.score),
     createdAt: row?.created_at ?? row?.createdAt ?? null,
+    updatedAt: row?.updated_at ?? row?.updatedAt ?? row?.created_at ?? row?.createdAt ?? null,
   };
 }
 
+function rankHybridCandidates(rows, query, limit) {
+  const byId = new Map();
+  for (const row of rows ?? []) {
+    const memory = normalizeRow(row);
+    if (!memory) continue;
+    const key = memory.id ?? `${memory.label}:${memory.text}`;
+    if (!byId.has(key)) byId.set(key, memory);
+  }
+  return [...byId.values()]
+    .map((memory) => ({
+      memory,
+      lexicalScore: lexicalQueryCoverage(query, memory.text),
+      vectorScore: Number.isFinite(memory.score) ? memory.score : -1,
+      updatedAt: timestampValue(memory.updatedAt),
+    }))
+    .sort((left, right) => {
+      if (left.lexicalScore !== right.lexicalScore) {
+        return right.lexicalScore - left.lexicalScore;
+      }
+      if (left.lexicalScore > 0 && left.updatedAt !== right.updatedAt) {
+        return right.updatedAt - left.updatedAt;
+      }
+      return right.vectorScore - left.vectorScore;
+    })
+    .slice(0, limit)
+    .map(({ memory }) => memory);
+}
+
 export function createPgvectorMemoryBackend({
   pool = null,
   enabled = false,
@@ -75,15 +141,38 @@ export function createPgvectorMemoryBackend({
       const embedding = await resolveEmbedding(input);
       if (!embedding) return { memories: [], semanticMemories: [] };
       const limit = Math.max(1, Math.min(50, Number(input.limit ?? defaultLimit) || defaultLimit));
+      const candidateLimit = Math.max(
+        limit,
+        Math.min(100, Number(input.candidateLimit ?? 50) || 50),
+      );
       const sql = `
-        SELECT id, content, type, created_at, 1 - (embedding <=> $2::vector) AS score
-        FROM ${resolvedTableName}
-        WHERE user_id = $1
-        ORDER BY embedding <=> $2::vector
-        LIMIT $3
+        WITH vector_candidates AS (
+          SELECT id, content, type, created_at, updated_at,
+                 1 - (embedding <=> $2::vector) AS score,
+                 0 AS source_priority
+          FROM ${resolvedTableName}
+          WHERE user_id = $1
+          ORDER BY embedding <=> $2::vector
+          LIMIT $3
+        ), recent_candidates AS (
+          SELECT id, content, type, created_at, updated_at,
+                 1 - (embedding <=> $2::vector) AS score,
+                 1 AS source_priority
+          FROM ${resolvedTableName}
+          WHERE user_id = $1
+          ORDER BY updated_at DESC
+          LIMIT $3
+        )
+        SELECT DISTINCT ON (id) id, content, type, created_at, updated_at, score
+        FROM (
+          SELECT * FROM vector_candidates
+          UNION ALL
+          SELECT * FROM recent_candidates
+        ) AS candidates
+        ORDER BY id, source_priority
       `;
-      const result = await pool.query(sql, [userId, vectorLiteral(embedding), limit]);
-      const memories = (result?.rows ?? []).map((row) => normalizeRow(row)).filter(Boolean);
+      const result = await pool.query(sql, [userId, vectorLiteral(embedding), candidateLimit]);
+      const memories = rankHybridCandidates(result?.rows ?? [], input.query, limit);
       return {
         semanticMemories: memories.map((item) => item.text),
         memories,
@@ -91,3 +180,8 @@ export function createPgvectorMemoryBackend({
     },
   };
 }
+
+export const pgvectorMemoryBackendInternals = {
+  lexicalQueryCoverage,
+  rankHybridCandidates,
+};

memory-v2-pgvector.test.mjs

@@ -1,7 +1,10 @@
 import assert from 'node:assert/strict';
 import test from 'node:test';
 import { createMemoryV2 } from './memory-v2.mjs';
-import { createPgvectorMemoryBackend } from './memory-v2-pgvector.mjs';
+import {
+  createPgvectorMemoryBackend,
+  pgvectorMemoryBackendInternals,
+} from './memory-v2-pgvector.mjs';
 
 test('pgvector backend is disabled by default and does not query storage', async () => {
   let queried = false;
@@ -85,7 +88,9 @@ test('pgvector backend performs parameterized vector lookup when explicitly enab
 
   assert.equal(queries.length, 1);
   assert.match(queries[0].sql, /FROM memory_embeddings/);
-  assert.deepEqual(queries[0].params, ['user-1', '[0.25,0.5,0.75]', 5]);
+  assert.match(queries[0].sql, /WITH vector_candidates/);
+  assert.match(queries[0].sql, /recent_candidates/);
+  assert.deepEqual(queries[0].params, ['user-1', '[0.25,0.5,0.75]', 50]);
   assert.deepEqual(result.semanticMemories, ['用户关注 Memory V2 的 facade 边界']);
   assert.deepEqual(result.memories, [
     {
@@ -94,10 +99,68 @@ test('pgvector backend performs parameterized vector lookup when explicitly enab
       text: '用户关注 Memory V2 的 facade 边界',
       score: 0.87,
       createdAt: '2026-07-02T00:00:00.000Z',
+      updatedAt: '2026-07-02T00:00:00.000Z',
     },
   ]);
 });
 
+test('pgvector hybrid ranking recovers a recent Chinese memory missed by vector top-k', async () => {
+  const marker = 'MEM-RECALL-NEW';
+  const backend = createPgvectorMemoryBackend({
+    enabled: true,
+    pool: {
+      async query() {
+        return {
+          rows: [
+            {
+              id: 1,
+              content: '用户以前关注贵州旅游攻略',
+              type: 'interest',
+              score: 0.91,
+              created_at: '2026-06-01T00:00:00.000Z',
+              updated_at: '2026-06-01T00:00:00.000Z',
+            },
+            {
+              id: 2,
+              content: `用户的记忆召回灰度测试代号是 ${marker}`,
+              type: 'fact',
+              score: -0.49,
+              created_at: '2026-07-22T00:00:00.000Z',
+              updated_at: '2026-07-22T00:00:00.000Z',
+            },
+            {
+              id: 3,
+              content: '用户偏好简洁回答',
+              type: 'preference',
+              score: 0.3,
+              created_at: '2026-07-21T00:00:00.000Z',
+              updated_at: '2026-07-21T00:00:00.000Z',
+            },
+          ],
+        };
+      },
+    },
+    embedQuery: async () => [0.25, 0.5, 0.75],
+  });
+
+  const result = await backend.resolve({
+    userId: 'user-1',
+    query: '我之前让你记住的记忆召回灰度测试代号是什么？请只回答完整代号。',
+    limit: 3,
+  });
+
+  assert.match(result.memories[0].text, new RegExp(marker));
+});
+
+test('pgvector hybrid ranking keeps vector order when query has no lexical overlap', () => {
+  const ranked = pgvectorMemoryBackendInternals.rankHybridCandidates([
+    { id: 1, content: 'alpha', score: 0.2 },
+    { id: 2, content: 'beta', score: 0.8 },
+  ], '完全无关的中文查询', 2);
+  assert.equal(ranked[0].id, '2');
+  assert.equal(ranked[1].id, '1');
+});
+
 test('pgvector backend validates table names before building SQL', () => {
   assert.throws(
     () => createPgvectorMemoryBackend({ tableName: 'memory_embeddings;DROP TABLE users' }),

memory-v2-runtime.test.mjs

@@ -385,7 +385,8 @@ test('createMemoryV2Runtime selects pgvector only when pool and embedding are co
   assert.equal(queries.length, 1);
   assert.equal(queries[0].options.connectionString, 'postgresql://local/memory');
   assert.equal(queries[0].options.max, 2);
-  assert.deepEqual(queries[0].params, ['u1', '[0.1,0.2,0.3]', 8]);
+  assert.match(queries[0].sql, /recent_candidates/);
+  assert.deepEqual(queries[0].params, ['u1', '[0.1,0.2,0.3]', 50]);
 
   await memory.close();
   assert.equal(poolEnded, true);

server.mjs

@@ -199,7 +199,11 @@ import { createFeedbackService } from './user-feedback.mjs';
 import { startScheduleReminderWorker } from './schedule-reminder-worker.mjs';
 import { createLlmProviderService, RELAY_BOOTSTRAP } from './llm-providers.mjs';
 import { createDirectChatService, isDirectChatSessionId, isPortalDirectChatSnapshot, sendDirectChatSessionEvents, shouldExpirePortalDirectChatSnapshot } from './direct-chat-service.mjs';
-import { filterUserVisibleConversation, repairSessionConversationFromDb } from './conversation-repair.mjs';
+import {
+  filterUserVisibleConversation,
+  repairSessionConversationFromDb,
+  restoreConversationUserMessagesFromAgentRunsFailOpen,
+} from './conversation-repair.mjs';
 import { filterNonemptyUserVisibleMessages } from './conversation-transcript-persist.mjs';
 import { createSessionStreamStore } from './session-stream-store.mjs';
 import { isSessionStreamReplayEnabled } from './session-stream.mjs';
@@ -2275,7 +2279,14 @@ async function loadUserVisibleConversation(sessionId, userId) {
   if (authPool && userId) {
     session = await repairSessionConversationFromDb(authPool, session, sessionId, userId);
   }
-  return filterUserVisibleConversation(session?.conversation ?? []);
+  const visible = filterUserVisibleConversation(session?.conversation ?? []);
+  if (!authPool || !userId) return visible;
+  return restoreConversationUserMessagesFromAgentRunsFailOpen(
+    authPool,
+    visible,
+    sessionId,
+    userId,
+  );
 }
 
 async function syncUserMemoriesIntoSession(userId, sessionId) {

wechat-mp.mjs

@@ -1030,6 +1030,7 @@ export function isRecoverableWechatAgentSessionError(message) {
   const normalized = String(message ?? '').trim();
   if (!normalized) return false;
   if (/stale_session_poisoned_completion/i.test(normalized)) return true;
+  if (/wechat_page_fresh_thumbnail_required:/i.test(normalized)) return true;
   if (/403|404|not found|无权访问/i.test(normalized)) return true;
   if (/tool_calls|tool_call_id|insufficient tool messages/i.test(normalized)) return true;
   if (/session already has an active request|active request.*cancel/i.test(normalized)) return true;
@@ -1840,6 +1841,7 @@ export function createWechatMpService({
     user,
     imagePolicy,
     publishDir,
+    notifyFailure = true,
   }) => {
     if (imagePolicy?.pageThumbnailMode !== WECHAT_PAGE_THUMBNAIL_MODE.REQUIRED_FRESH) return;
     const images = collectWechatGeneratedImages(reply?.messages ?? []);
@@ -1860,14 +1862,16 @@ export function createWechatMpService({
       }
     }
     const text = buildPagePublishFailureText({ missingFreshThumbnail: true });
-    try {
-      await sendCustomerServiceText(openid, text, user);
-    } catch (sendErr) {
-      logger.error?.('WeChat MP fresh thumbnail failure notice failed:', sendErr);
+    if (notifyFailure) {
+      try {
+        await sendCustomerServiceText(openid, text, user);
+      } catch (sendErr) {
+        logger.error?.('WeChat MP fresh thumbnail failure notice failed:', sendErr);
+      }
     }
     const error = new Error(`wechat_page_fresh_thumbnail_required:${verification.reason}`);
     error.code = 'WECHAT_PAGE_FRESH_THUMBNAIL_REQUIRED';
-    throw markWechatUserNotified(error);
+    throw notifyFailure ? markWechatUserNotified(error) : error;
   };
 
   const ensureSessionProvider = async (sessionId) => {
@@ -2351,6 +2355,7 @@ export function createWechatMpService({
           user,
           imagePolicy,
           publishDir: workingDir,
+          notifyFailure: false,
         });
       }
       const pageDataOutcome = await enforcePageDataCollectDelivery({

wechat-mp.test.mjs

@@ -2723,6 +2723,12 @@ test('isRecoverableWechatAgentSessionError detects poisoned tool_calls history',
     true,
   );
   assert.equal(isRecoverableWechatAgentSessionError('stale_session_poisoned_completion'), true);
+  assert.equal(
+    isRecoverableWechatAgentSessionError(
+      'wechat_page_fresh_thumbnail_required:fresh_image_not_generated',
+    ),
+    true,
+  );
   assert.equal(isRecoverableWechatAgentSessionError('无权访问该会话'), true);
   assert.equal(
     isRecoverableWechatAgentSessionError('Session already has an active request. Cancel it first.'),
@@ -5119,6 +5125,210 @@ test('wechat mp page delivery requires and verifies a current-run fresh thumbnai
   assert.match(wechatPayloads[0].text.content, /fresh\.html/);
 });
 
+test('wechat mp retries a page in a new session before reporting a missing fresh thumbnail', async () => {
+  const token = 'token';
+  const timestamp = '1710000000';
+  const nonce = 'nonce';
+  const workspaceRoot = fs.mkdtempSync('/tmp/wechat-mp-fresh-thumbnail-retry-');
+  const htmlPath = path.join(workspaceRoot, 'public', 'retry.html');
+  const generated = {
+    ok: true,
+    jobId: 'job-fresh-page-retry',
+    source: { mimeType: 'image/webp', width: 1280, height: 720 },
+    asset: {
+      id: 'asset-fresh-page-retry',
+      htmlSrc: 'images/retry-cover.webp',
+      publicUrl: 'https://example.com/MindSpace/user-1/public/images/retry-cover.webp',
+      workspaceRelativePath: 'public/images/retry-cover.webp',
+    },
+  };
+  const firstHtml = previewReadyPageHtml({
+    title: 'Retry',
+    subtitle: '首次没有新缩略图',
+    cover: 'images/missing-cover.webp',
+  });
+  const retryHtml = previewReadyPageHtml({
+    title: 'Retry',
+    subtitle: '重试生成新缩略图',
+    cover: generated.asset.htmlSrc,
+  });
+  const pageImage = await sharp({
+    create: { width: 64, height: 64, channels: 3, background: '#cc6633' },
+  }).webp().toBuffer();
+  const eventFrame = (event) => `data: ${JSON.stringify(event)}\n\n`;
+  const wechatPayloads = [];
+  let routeCleared = false;
+  let startedSessions = 0;
+
+  const replyEvents = ({ requestId, html, includeImage = false }) => [
+    eventFrame({
+      type: 'Message',
+      request_id: requestId,
+      message: {
+        id: `${requestId}-tools`,
+        role: 'assistant',
+        metadata: { userVisible: true },
+        content: [
+          {
+            id: `${requestId}-page-skill`,
+            type: 'toolRequest',
+            toolCall: { value: { name: 'load_skill', arguments: { name: 'static-page-publish' } } },
+          },
+          ...(includeImage
+            ? [
+                {
+                  id: `${requestId}-image`,
+                  type: 'toolRequest',
+                  toolCall: {
+                    value: { name: 'sandbox-fs__generate_image', arguments: { purpose: 'hero' } },
+                  },
+                },
+                {
+                  id: `${requestId}-image`,
+                  type: 'toolResponse',
+                  toolResult: {
+                    status: 'success',
+                    value: { content: [{ type: 'text', text: JSON.stringify(generated) }] },
+                  },
+                },
+              ]
+            : []),
+          {
+            id: `${requestId}-write`,
+            type: 'toolRequest',
+            toolCall: {
+              value: {
+                name: 'sandbox-fs__write_file',
+                arguments: { path: 'public/retry.html', content: html },
+              },
+            },
+          },
+        ],
+      },
+    }),
+    eventFrame({
+      type: 'Message',
+      request_id: requestId,
+      message: {
+        id: `${requestId}-final`,
+        role: 'assistant',
+        metadata: { userVisible: true },
+        content: [{
+          type: 'text',
+          text: '页面已完成：https://example.com/MindSpace/user-1/public/retry.html',
+        }],
+      },
+    }),
+    eventFrame({
+      type: 'Finish',
+      request_id: requestId,
+      token_state: { inputTokens: 1, outputTokens: 2 },
+    }),
+  ].join('');
+
+  const service = createBoundWechatService({
+    token,
+    config: { requireFreshPageThumbnail: true },
+    startAgentSession: async () => {
+      startedSessions += 1;
+      return { id: 'session-2' };
+    },
+    userAuth: {
+      async getWechatAgentRoute() {
+        return routeCleared ? null : { agentSessionId: 'session-1' };
+      },
+      async clearWechatAgentRoute() {
+        routeCleared = true;
+      },
+      async upsertWechatAgentRoute({ agentSessionId }) {
+        assert.equal(agentSessionId, 'session-2');
+      },
+      async resolveWorkingDir() {
+        return workspaceRoot;
+      },
+      async getUserPublishLayout() {
+        return {
+          publishDir: workspaceRoot,
+          displayName: 'John',
+          username: 'john',
+          slug: 'john',
+          constraints: null,
+        };
+      },
+    },
+    sessionApiFetch: async (sessionId, pathname) => {
+      if (pathname === '/agent/harness_remember' || pathname === '/agent/harness_bootstrap') {
+        return new Response('{}', { status: 200, headers: { 'Content-Type': 'application/json' } });
+      }
+      if (pathname === `/sessions/${sessionId}/reply`) {
+        fs.mkdirSync(path.dirname(htmlPath), { recursive: true });
+        if (sessionId === 'session-1') {
+          fs.writeFileSync(htmlPath, firstHtml, 'utf8');
+        } else {
+          fs.writeFileSync(htmlPath, retryHtml, 'utf8');
+          fs.mkdirSync(path.join(workspaceRoot, 'public', 'images'), { recursive: true });
+          fs.writeFileSync(path.join(workspaceRoot, 'public', generated.asset.htmlSrc), pageImage);
+        }
+        return new Response('{}', { status: 200, headers: { 'Content-Type': 'application/json' } });
+      }
+      if (pathname === '/sessions/session-1/events') {
+        return new Response(
+          replyEvents({ requestId: 'req-thumbnail-first', html: firstHtml }),
+          { status: 200, headers: { 'Content-Type': 'text/event-stream' } },
+        );
+      }
+      if (pathname === '/sessions/session-2/events') {
+        return new Response(
+          replyEvents({ requestId: 'req-thumbnail-retry', html: retryHtml, includeImage: true }),
+          { status: 200, headers: { 'Content-Type': 'text/event-stream' } },
+        );
+      }
+      throw new Error(`unexpected session path: ${sessionId} ${pathname}`);
+    },
+    wechatFetch: async (url, init = {}) => {
+      if (String(url).includes('/cgi-bin/stable_token')) {
+        return new Response(JSON.stringify({ access_token: 'access-1', expires_in: 7200 }), {
+          status: 200,
+          headers: { 'Content-Type': 'application/json' },
+        });
+      }
+      if (String(url).includes('/cgi-bin/message/custom/send')) {
+        wechatPayloads.push(JSON.parse(init.body));
+        return new Response(JSON.stringify({ errcode: 0, errmsg: 'ok' }), {
+          status: 200,
+          headers: { 'Content-Type': 'application/json' },
+        });
+      }
+      throw new Error(`unexpected wechat url: ${url}`);
+    },
+  });
+
+  const originalRandomUuid = crypto.randomUUID;
+  crypto.randomUUID = (() => {
+    const ids = ['req-thumbnail-first', 'req-thumbnail-retry'];
+    return () => ids.shift() ?? 'req-thumbnail-retry';
+  })();
+  try {
+    const result = await service.handleInboundMessage(
+      inboundXml({ content: '生成一个活动页面，只要文字，不要正文图片' }),
+      { timestamp, nonce, signature: signatureFor(token, timestamp, nonce) },
+    );
+    assert.equal(result.status, 200);
+    await result.task;
+    assert.equal(fs.existsSync(path.join(workspaceRoot, 'public', 'retry.thumbnail.svg')), true);
+  } finally {
+    crypto.randomUUID = originalRandomUuid;
+    fs.rmSync(workspaceRoot, { recursive: true, force: true });
+  }
+
+  assert.equal(routeCleared, true);
+  assert.equal(startedSessions, 1);
+  assert.equal(wechatPayloads.length, 1);
+  assert.equal(wechatPayloads[0].msgtype, 'text');
+  assert.match(wechatPayloads[0].text.content, /retry\.html/);
+  assert.doesNotMatch(wechatPayloads[0].text.content, /没有完成服务号要求的本轮新缩略图/);
+});
+
 test('wechat mp standalone image intent sends a native image message and text', async () => {
   const token = 'token';
   const timestamp = '1710000000';