diff --git a/docs/superpowers/plans/2026-08-25-mail.md b/docs/superpowers/plans/2026-08-25-mail.md
index 78a7bba..235adbf 100644
--- a/docs/superpowers/plans/2026-08-25-mail.md
+++ b/docs/superpowers/plans/2026-08-25-mail.md
@@ -5070,6 +5070,18 @@ describe('token', () => {
     expect(calls[0]?.url).toContain('corpsecret=cs-1');
   });
 
+  it('**-1 连着来到边界就不再重试**:第 4 次仍是 -1 即抛', async () => {
+    const { fetch, calls } = scripted({
+      '/cgi-bin/gettoken': () => ({ errcode: 0, access_token: 't', expires_in: 7200 }),
+      'get_email_alias': () => ({ errcode: -1, errmsg: 'system busy' }),
+    });
+    const report = await createWecomProvider({ fetch }).probe(account);
+    expect(report.receive.ok).toBe(false);
+    expect(report.receive.error).toContain('-1');
+    // BUSY_RETRIES = 3 —— 首次 + 3 次重试 = 4 次调用,然后放弃
+    expect(calls.filter((c) => c.url.includes('get_email_alias'))).toHaveLength(4);
+  });
+
   it('-1 系统繁忙重试 ≤3 次;别的错误码抛 WecomApiError 带 api 名', async () => {
     let busy = 2;
     const { fetch } = scripted({
@@ -5125,6 +5137,21 @@ describe('pull', () => {
     expect(result.more).toBe(false);
   });
 
+  it('**单页翻完但新信多过 limit**:游标不许推进(否则截掉的那些永久丢)', async () => {
+    const { fetch } = scripted({
+      '/cgi-bin/gettoken': () => ({ errcode: 0, access_token: 't', expires_in: 7200 }),
+      // has_more:0 —— 页是翻完了,可这一页的新信比本轮预算多
+      'get_mail_list': () => ({ errcode: 0, next_cursor: '', has_more: 0, mail_list: [{ mail_id: 'm1' }, { mail_id: 'm2' }, { mail_id: 'm3' }] }),
+      'read_mail': () => ({ errcode: 0, mail_data: EML }),
+    });
+    const cursor = wecomCursor(1);
+    const result = await createWecomProvider({ fetch }).pull(account, cursor, { limit: 2, now, backfillFrom: null, known });
+    expect(result.messages.map((m) => m.providerRef)).toEqual(['m1', 'm2']);
+    expect(result.more).toBe(true);
+    // 「页翻完了」≠「新信吃完了」—— 游标跟着 exhausted 走就会把 m3 跳过去
+    expect(result.cursor).toEqual(cursor);
+  });
+
   it('取满 limit 就停,more=true', async () => {
     const { fetch } = scripted({
       '/cgi-bin/gettoken': () => ({ errcode: 0, access_token: 't', expires_in: 7200 }),
@@ -5341,11 +5368,13 @@ export function createWecomProvider(deps: { fetch?: FetchLike; now?: () => numbe
         messages.push({ providerRef: mailId, eml: emlBytesOf(data), receivedAt: opts.now });
       }
       /*
-       * 游标**只在把这个窗口翻完时**才推到窗口上沿;被 limit 截断时原样退回旧游标 ——
-       * 否则没读到的那几封就被跳过去了(重叠窗只兜 10 分钟,兜不住一次积压)。
-       * 退回不会卡住:已入库的下一轮被 `known` 滤掉,每轮照旧往前吃一批。
+       * 游标推进与 `more` **必须由同一个判据决定**:只有「这一窗的新信全吃完了」才推到窗口上沿。
+       * `exhausted` 只说明**页翻完了** —— 最后一页可能同时 `has_more:0` 且新信多过本轮预算
+       * (`LIST_PAGE` 是 100,与 `opts.limit` 无关),那时 `wanted` 截掉的那些若跟着推进游标就**永久丢**了
+       * (重叠窗只兜 10 分钟)。退回不会卡住:已入库的下一轮被 `known` 滤掉,每轮照旧往前吃一批。
        */
-      return { messages, cursor: exhausted ? wecomCursor(endTime) : cursor, more: !exhausted || fresh.length > wanted.length };
+      const more = !exhausted || fresh.length > wanted.length;
+      return { messages, cursor: more ? cursor : wecomCursor(endTime), more };
     },
 
     async send(account, message) {