diff --git a/pipeline_bidding/bid_flow.py b/pipeline_bidding/bid_flow.py
index 705bb04..a9e9aaf 100644
--- a/pipeline_bidding/bid_flow.py
+++ b/pipeline_bidding/bid_flow.py
@@ -557,6 +557,13 @@ async def reconcile_project(sor, project_id, project_name=""):
         for t, _, _, _ in needs_qc:
             if await _open_qc_type_tasks(sor, project_id, t) > 0:
                 continue
+            # 竞态守卫（2026-09-02）：该维度分析/重做任务在办 → 不派审核。
+            # 根治：产出被清空后重做任务还在跑，QC 审核就先派出去对着重写中
+            # 的半成品打分（实测 cost_benefit 对空表打 0、qualifications 被连烧两轮）。
+            dim = QC_TYPE_TO_DIM.get(t, "")
+            if dim and await _open_dim_tasks(sor, project_id, dim) > 0:
+                acts.append("waiting: 维度「%s」分析任务在办，暂不派 %s 审核" % (dim, t))
+                continue
             tid = await create_role_task(
                 sor, project_id, R_QC,
                 "%s 解析产出契合度审核（%s）" % (pname, t),
diff --git a/pipeline_bidding/bid_qc_capability.py b/pipeline_bidding/bid_qc_capability.py
index f88adfd..c3844ee 100644
--- a/pipeline_bidding/bid_qc_capability.py
+++ b/pipeline_bidding/bid_qc_capability.py
@@ -119,6 +119,32 @@ async def start_qc(qc_type, project_id="", who=None, agent_id=None, task_id=""):
             "AND fit_score IS NULL ORDER BY created_at DESC LIMIT 1",
             {"p": project_id, "t": qc_type})
         await sor.sqlExe("COMMIT", {})
+        # 已通过守卫（2026-09-02）：最新一轮已放行 → 不再开新轮。
+        # 根治：任务被引擎通用门禁弹回重跑时再次 start_qc 会白白烧掉一轮
+        # （qualifications 实测：第2轮8.80已过，弹回重跑开第3轮对重写中的表打5.6）。
+        # 产出若被 QC 清空重做，对账器只在重做完成后才重新派审核，此处不会误挡。
+        last_r = await sor.sqlExe(
+            "SELECT round, fit_score, passed FROM bid_qc_reviews WHERE project_id=${p}$ AND qc_type=${t}$ "
+            "ORDER BY round DESC LIMIT 1", {"p": project_id, "t": qc_type})
+        await sor.sqlExe("COMMIT", {})
+        if last_r and not open_r and str(rec_to_dict(last_r[0]).get("passed")) == "1":
+            _lr = rec_to_dict(last_r[0])
+            return True, {"status": "already_passed", "qc_type": qc_type,
+                          "round": _lr.get("round"), "fit_score": _lr.get("fit_score"),
+                          "message": "该类型第 %s 轮已通过契合度审核（%.2f 分 > 通过分），无需重审。"
+                                     "直接完成任务即可。" % (_lr.get("round"), to_float(_lr.get("fit_score")))}
+        # 空产出守卫（2026-09-02）：产出被 QC 清空、重做未完成 → 不开新轮。
+        # 根治：QC 审核任务比分析重做任务先跑时对着空表开轮打 0 分，白白烧一轮
+        # （cost_benefit 实测：第2轮对着零记录表打 0.00）。
+        _cnt = await sor.sqlExe(
+            "SELECT COUNT(*) AS c FROM " + QC_OUTPUT_TABLE[qc_type] + " WHERE project_id=${p}$",
+            {"p": project_id})
+        await sor.sqlExe("COMMIT", {})
+        if not open_r and to_int(getattr(_cnt[0], "c", 0) if _cnt else 0) == 0:
+            return True, {"status": "no_output", "qc_type": qc_type,
+                          "message": "%s 当前无产出记录（被 QC 清空待重做或重做未完成），"
+                                     "不开评审轮次。请等待分析重做任务落库后再审，"
+                                     "本轮任务直接交付说明等待原因即可。" % qc_type}
         if open_r:
             rid = getattr(open_r[0], "id", "")
             rnd = to_int(getattr(open_r[0], "round", 1), 1)