diff --git a/pipeline_bidding/bid_analysis_capability.py b/pipeline_bidding/bid_analysis_capability.py
index c4d8912..7942abc 100644
--- a/pipeline_bidding/bid_analysis_capability.py
+++ b/pipeline_bidding/bid_analysis_capability.py
@@ -436,6 +436,64 @@ async def add_doc_requirement(project_id, requirement, req_type="structure",
         return True, "投标文件要求已录入: %s %s" % (req_type, chapter_title or "")
 
 
+async def update_doc_requirement(project_id, record_id="", chapter_no="", req_type="",
+                                 requirement="", source_ref="", page_limit="",
+                                 delete=False, who=None, agent_id=None):
+    """更新/删除既有投标文件要求条目（2026-09-03，根治 add 只增不改）。
+
+    定位：record_id 优先；否则 chapter_no+req_type 唯一定位。
+    - delete=True → 删除该条（编造/无出处项的处置）；
+    - requirement/source_ref/page_limit 非空 → 回写原条目（纠正必须回写，不得只追加新条目）。
+    """
+    try:
+        project_id = await resolve_project_id(project_id)
+    except ValueError as e:
+        return False, str(e)
+    db, dbname = get_db()
+    async with db.sqlorContext(dbname) as sor:
+        if record_id:
+            recs = await sor.sqlExe(
+                "SELECT id FROM bid_doc_requirements WHERE project_id=${pid}$ AND id=${r}$",
+                {"pid": project_id, "r": record_id})
+        elif chapter_no:
+            recs = await sor.sqlExe(
+                "SELECT id FROM bid_doc_requirements WHERE project_id=${pid}$ "
+                "AND chapter_no=${c}$ AND req_type=${rt}$",
+                {"pid": project_id, "c": str(chapter_no)[:30],
+                 "rt": (req_type or "structure")[:30]})
+        else:
+            return False, "需要 record_id 或 chapter_no 定位条目"
+        await sor.sqlExe("COMMIT", {})
+        if not recs:
+            return False, "未找到条目（record_id=%s chapter_no=%s req_type=%s）" % (
+                record_id, chapter_no, req_type)
+        if len(recs) > 1 and not record_id:
+            return False, "chapter_no+req_type 命中 %d 条，请改用 record_id 精确定位" % len(recs)
+        rid = getattr(recs[0], "id", "")
+        if delete:
+            await sor.sqlExe("DELETE FROM bid_doc_requirements WHERE id=${r}$", {"r": rid})
+            await sor.sqlExe("COMMIT", {})
+            await record(sor, project_id, "bid_doc_requirements", rid, "delete",
+                         who=who, agent_id=agent_id, detail="删除条目")
+            return True, "已删除条目 %s" % rid
+        sets, p = [], {"r": rid}
+        if requirement:
+            sets.append("requirement=${rq}$"); p["rq"] = requirement
+        if source_ref:
+            sets.append("source_ref=${sr}$"); p["sr"] = str(source_ref)[:480]
+        if page_limit:
+            sets.append("page_limit=${pl}$"); p["pl"] = to_int(page_limit, 0) or None
+        if not sets:
+            return False, "无可更新字段（requirement/source_ref/page_limit 至少传一个）"
+        sets.append("updated_at=NOW()")
+        await sor.sqlExe("UPDATE bid_doc_requirements SET " + ", ".join(sets) +
+                         " WHERE id=${r}$", p)
+        await sor.sqlExe("COMMIT", {})
+        await record(sor, project_id, "bid_doc_requirements", rid, "update",
+                     who=who, agent_id=agent_id, detail="回写原条目")
+        return True, "已更新条目 %s" % rid
+
+
 async def _upsert_tender_facts(project_id, facts, who=None, agent_id=None):
     """把投标要素写入 bid_tenders（source=tender_doc，复用原招标信息表承载商务要素）。
 
diff --git a/pipeline_bidding/role_tool_schemas.py b/pipeline_bidding/role_tool_schemas.py
index 9ffb92b..0e57a13 100644
--- a/pipeline_bidding/role_tool_schemas.py
+++ b/pipeline_bidding/role_tool_schemas.py
@@ -110,6 +110,15 @@ BID_ROLE_TOOL_SCHEMAS = {
                    "patches": "JSON数组[{chapter_no,title?,outline?,section?,scoring_item_ids?,scoring_items_by_name?,max_score?}]"},
         "required": ["patches"],
     },
+    "update_doc_requirement": {
+        "module": f"{_M}.bid_analysis_capability",
+        "description": "更新/删除既有投标文件要求条目（纠正必须回写原条目，不得只追加新条目形成矛盾对；编造/无出处项用 delete 删除）。add_doc_requirement 只增不改",
+        "params": {"project_id": "项目ID(可选,默认当前)", "record_id": "条目ID(优先)",
+                   "chapter_no": "章节号(与req_type组合定位)", "req_type": "类型(structure/format/seal/copies/deadline/other)",
+                   "requirement": "回写的新正文(可选)", "source_ref": "回写原文出处(可选)",
+                   "page_limit": "页数(可选)", "delete": "true=删除该条(可选)"},
+        "required": [],
+    },
     "list_scoring_items": {
         "module": f"{_M}.bid_analysis_capability",
         "description": "列出评分项与得分规则",