diff --git a/app/schemas/compare_record.py b/app/schemas/compare_record.py
index 9fa196e..bd84735 100644
--- a/app/schemas/compare_record.py
+++ b/app/schemas/compare_record.py
@@ -11,7 +11,7 @@ from __future__ import annotations
 
 from datetime import datetime
 
-from pydantic import BaseModel, ConfigDict, Field
+from pydantic import BaseModel, ConfigDict, Field, field_validator
 
 
 # ===== 上报请求 =====
@@ -21,8 +21,36 @@ class ComparisonItemIn(BaseModel):
 
     name: str
     qty: int = 1
+    # specs 仅供比价记录展示(admin-web 详情 / app 记录页都按字符串数组渲染并 join)。
+    # pricebot(2026-06-27 嵌套规格统一)起 calibration 的 specs 可能是规格对象
+    # [{name, qty, sub_specs}] 而非字符串 → 下面的 before-validator 统一拍平成可读字符串,
+    # 兼容新旧两种输入、保持 list[str] 契约不变(下游零改动)。
+    # ⚠️ 两个坑都踩过, 必须"拍平"而非别的: ① 直接声明 list[str] 不拍平 → 对象 specs 整条
+    # 422 被拒、不入库(同下方 platform_results list→dict 同类事故); ② 仅放宽成裸 list 又会让
+    # 下游 join 出 "[object Object]"/对象 toString 的乱码。
     specs: list[str] | None = None
 
+    @field_validator("specs", mode="before")
+    @classmethod
+    def _flatten_specs(cls, v: object) -> object:
+        """pricebot 规格对象 [{name, qty, sub_specs}] → 可读字符串数组; 字符串元素原样保留;
+        非 list 原样交还(让 pydantic 照常报类型错)。嵌套规格拼成 '主项(子1,子2)'。"""
+        if not isinstance(v, list):
+            return v
+        out: list[str] = []
+        for it in v:
+            if isinstance(it, str):
+                s = it
+            elif isinstance(it, dict):
+                name = str(it.get("name") or "").strip()
+                subs = [str(x).strip() for x in (it.get("sub_specs") or []) if str(x).strip()]
+                s = f"{name}({','.join(subs)})" if name and subs else (name or ",".join(subs))
+            else:
+                continue
+            if s:
+                out.append(s)
+        return out
+
 
 class AppliedCouponIn(BaseModel):
     """单笔已用优惠(来自 comparison_results[].applied_coupons)。amount 单位:元、正数。"""