fix(wechat): guard ambiguous memory recall and scheduled task execution

Skip memory injection for short filler messages, demote page-workflow memory
pollution, keep scheduled automation off page.generate, and fail scheduled
tasks that only return clarification instead of deliverables.

Co-authored-by: Cursor <cursoragent@cursor.com>

chat-intent-router.mjs

@@ -208,6 +208,40 @@ export function isMemoryRecallQuestion(text) {
   return MEMORY_RECALL_PATTERNS.some((pattern) => pattern.test(normalized));
 }
 
+const PAGE_WORKFLOW_QUERY_PATTERNS = [
+  /(?:生成|做成|整理|排版|导出|发布).{0,8}(?:页面|网页|html|专题|报告页|推文)/iu,
+  /(?:mindspace|MindSpace)/u,
+  /每日新闻/u,
+];
+
+const PAGE_WORKFLOW_MEMORY_PATTERNS = [
+  /(?:做成|生成|整理|排版).{0,8}(?:页面|网页|html|专题|报告)/iu,
+  /每日新闻/u,
+  /(?:mindspace|MindSpace)/u,
+  /页面.{0,8}(?:偏好|习惯|模板)/u,
+];
+
+export function queryImpliesPageWorkflow(text) {
+  const normalized = String(text ?? '').trim();
+  if (!normalized) return false;
+  return PAGE_WORKFLOW_QUERY_PATTERNS.some((pattern) => pattern.test(normalized));
+}
+
+function isPageWorkflowMemory(text) {
+  const normalized = String(text ?? '').trim();
+  if (!normalized) return false;
+  return PAGE_WORKFLOW_MEMORY_PATTERNS.some((pattern) => pattern.test(normalized));
+}
+
+export function shouldSkipAmbiguousMemoryQuery(text) {
+  const normalized = String(text ?? '').trim();
+  if (!normalized) return true;
+  if (isMemoryRecallQuestion(normalized)) return false;
+  if (pgvectorMemoryBackendInternals.extractKeywordTerms(normalized).length > 0) return false;
+  // Short acknowledgements/fillers without a topic anchor (e.g. 「可以」「先不聊了」).
+  return normalized.length <= 4;
+}
+
 function memoryItemText(item) {
   return String(item?.text ?? item?.memory_text ?? item?.content ?? '').trim();
 }
@@ -229,6 +263,13 @@ export function scoreAgentMemoryCandidate(item, query) {
   }
   let score = (lexical * 100) + keywordBoost;
   if (isEpisodicMemoryItem(item) && score > 0) score += 5;
+  if (
+    isPageWorkflowMemory(text)
+    && !queryImpliesPageWorkflow(query)
+    && !isMemoryRecallQuestion(query)
+  ) {
+    score -= 100;
+  }
   return score;
 }
 
@@ -1366,6 +1407,11 @@ export function createChatIntentRouter(options = {}) {
       agentMemoryMetrics.lastReason = 'intervention_skip';
       return { ...base, reason: 'intervention_skip' };
     }
+    if (shouldSkipAmbiguousMemoryQuery(text)) {
+      agentMemoryMetrics.skipped += 1;
+      agentMemoryMetrics.lastReason = 'ambiguous_query_skip';
+      return { ...base, reason: 'ambiguous_query_skip' };
+    }
     const startedAt = Date.now();
     try {
       let personalFailed = false;