diff --git a/docs/BUG_HISTORY.md b/docs/BUG_HISTORY.md
index d1307c3d..8fd835b6 100644
--- a/docs/BUG_HISTORY.md
+++ b/docs/BUG_HISTORY.md
@@ -5195,3 +5195,19 @@
 - 复发自：BUG-339（盘面入口 effect 同步 setState；点选卡与快照加载又写了同一模式）
 - 修复版本：a4ab229e
 
+## BUG-344 | 声明窗口模式未收窄本命类型，staging publish 镜像构建失败
+
+- 状态：resolved
+- 首次发现：2026-08-21
+- 最近更新：2026-08-21
+- 影响面：Gitea `backend-quality-gate` `publish`、`consultation-route-service.serverChartFromProfile`、`isNatalMinuteConsultationMode`
+- 用户现象：run `2029` `validate` 12 分钟通过，`publish` 在 `npm run build` 失败，镜像未发。站点仍停在 `e7f4030e`。
+- 触发条件：staging push 的 publish 镜像构建跑 `next build`。validate 对 staging push 跳过 production build。
+- 根因：BUG-341 给 `ConsultationBirthTimeMode` 增加了 `declared_birth_window`，但 `isNatalMinuteConsultationMode` 仍返回 `boolean`，TypeScript 无法收窄成 `verified_chart | unverified_birth_time`，`serverChartFromProfile` 在 `next build` 报 TS2345。
+- 修复：把该函数改成 `mode is NatalMinuteConsultationMode` 类型谓词。
+- 验证：`frontend/tests/consultation-birth-time-mode.test.ts`；本地 `tsc --noEmit` 通过。
+- 防复发：本命分钟模式判定必须是类型谓词。新增咨询模式时不得把窗口/百科模式传入 `serverChartFromProfile`。staging push 的类型错误只会在 publish 的 `next build` 暴露。
+- 相关记录：BUG-341、BUG-343
+- 复发自：BUG-341（第三条咨询路径扩大了 mode 联合类型，未改类型谓词）
+- 修复版本：pending
+
diff --git a/frontend/src/lib/consultation-birth-time-mode.ts b/frontend/src/lib/consultation-birth-time-mode.ts
index 3ab6f7fb..e9e4e478 100644
--- a/frontend/src/lib/consultation-birth-time-mode.ts
+++ b/frontend/src/lib/consultation-birth-time-mode.ts
@@ -12,10 +12,16 @@ export const consultationBirthTimeModeSchema = z.enum([
 ]);
 
 export type ConsultationBirthTimeMode = z.infer<typeof consultationBirthTimeModeSchema>;
+export type NatalMinuteConsultationMode = Extract<
+  ConsultationBirthTimeMode,
+  "verified_chart" | "unverified_birth_time"
+>;
 
 export const UNVERIFIED_BIRTH_TIME_NOTICE = "使用未校正填报时间；分钟敏感结论的置信度已降低。";
 
-export function isNatalMinuteConsultationMode(mode: ConsultationBirthTimeMode): boolean {
+export function isNatalMinuteConsultationMode(
+  mode: ConsultationBirthTimeMode,
+): mode is NatalMinuteConsultationMode {
   return mode === "verified_chart" || mode === "unverified_birth_time";
 }
 
diff --git a/frontend/tests/consultation-birth-time-mode.test.ts b/frontend/tests/consultation-birth-time-mode.test.ts
index ae4f3c86..d820eeb0 100644
--- a/frontend/tests/consultation-birth-time-mode.test.ts
+++ b/frontend/tests/consultation-birth-time-mode.test.ts
@@ -13,6 +13,11 @@ import { getGeneralJyotishAgent } from "../src/mastra/index.ts";
 import type { ResolvedLanguageModel } from "../src/mastra/model.ts";
 
 test("general-no-birth-time is an explicit server mode that never runs a chart workflow", () => {
+  const source = readFileSync(new URL("../src/lib/consultation-birth-time-mode.ts", import.meta.url), "utf8");
+  assert.match(
+    source,
+    /export function isNatalMinuteConsultationMode\(\s*mode: ConsultationBirthTimeMode,\s*\): mode is NatalMinuteConsultationMode/,
+  );
   assert.equal(consultationBirthTimeModeSchema.safeParse("verified_chart").success, true);
   assert.equal(consultationBirthTimeModeSchema.safeParse("unverified_birth_time").success, true);
   assert.equal(consultationBirthTimeModeSchema.safeParse("declared_birth_window").success, true);