diff --git a/docs/BUG_HISTORY.md b/docs/BUG_HISTORY.md
index 32c103fc..5956fde5 100644
--- a/docs/BUG_HISTORY.md
+++ b/docs/BUG_HISTORY.md
@@ -4617,7 +4617,7 @@
 - 防复发：生时纠正用户面不得再渲染 CompletedActivityReceipt；分盘句来自公开 executed methods；宫位表来自 decision receipt，缺表不得由模型编造。
 - 相关记录：BUG-179、BUG-181、BUG-304
 - 复发自：BUG-181（完成凭证成为用户主结果后，分盘和宫位没有独立正文位置）
-- 修复版本：待提交
+- 修复版本：`c8af18e9`
 
 ## BUG-308 | 咨询重跑改了草稿回填条件后，源码合同仍切旧 if，staging 质量门 1807/1808
 
@@ -4633,4 +4633,20 @@
 - 防复发：切 `send()` 失败回填不得再用无 `restoreOnFailure` 的旧 if。源码合同的起止标记必须随被切代码一起改，否则质量门会把无关提交打红。
 - 相关记录：BUG-249、BUG-306
 - 复发自：BUG-306（加了 `restoreOnFailure` 而未更新草稿隔离切片）
+- 修复版本：`d434aa48`
+
+## BUG-309 | Docker `npm run build` 因会话 schema 与动态 select 类型检查失败
+
+- 状态：resolved
+- 首次发现：2026-08-19
+- 最近更新：2026-08-19
+- 影响面：`deploy/railway-web.Dockerfile` 的 `RUN npm run build`、`POST /api/sessions`、`POST /api/daily-starlanguage`、`POST /api/synastry`
+- 用户现象：staging publish 在 web 镜像构建失败。BuildKit 日志末尾是 `skill-package-registry.ts` 的 Import traces（动态文件访问追踪警告），真正失败是 `Failed to type check`。
+- 触发条件：向 `staging` 推送后走 publish 镜像构建。push 上的 validate 跳过 `npm run build`，因此质量门绿、镜像红。
+- 根因：两处互不相关的 TypeScript 收口。`limitTranscriptSize()` 的泛型下界是 `{ messages: { text: string }[] }`，`.superRefine()` 之后推断输出被收成这个下界，`parsed.data` 不再有 `id`，也丢失消息上的 receipt 字段。每日星语与合盘把出生列 `.join(",")` 成普通 `string` 再交给 supabase-js，`select` 结果变成 `GenericStringError`，无法传入 `AccountBirthRow`。
+- 修复：`limitTranscriptSize` 按输入 schema 的 `Output` 原样返回 `z.ZodType<Output>`。出生列改为共享字面量 `ACCOUNT_BIRTH_SELECT`，`globalBirthProfileFromAccountRow` 接受 `unknown` 再收成账户行。
+- 验证：`npx tsc --noEmit` 无错误（修复前 3 个 route + 2 个测试文件）。`tsx --test tests/chat-session-write.test.ts tests/server-owned-birth-profile.test.ts tests/daily-starlanguage.test.ts tests/chart-library-other-profile.test.ts` 36/36。
+- 防复发：创建会话 schema 必须保留 `id`；出生资料 `select` 不得用 `.join(",")` 得到非字面量字符串。staging push 的 validate 不跑 `next build`，类型回归只在 publish Docker 暴露。
+- 相关记录：BUG-261、BUG-308
+- 复发自：无
 - 修复版本：待提交
diff --git a/frontend/src/app/api/daily-starlanguage/route.ts b/frontend/src/app/api/daily-starlanguage/route.ts
index 3ecf45e8..ab0608ca 100644
--- a/frontend/src/app/api/daily-starlanguage/route.ts
+++ b/frontend/src/app/api/daily-starlanguage/route.ts
@@ -13,7 +13,7 @@ import {
 import { dailyProfilePayload } from "@/lib/global-birth-payloads";
 import { loadLanguageModelCatalog } from "@/lib/model-catalog";
 import { consumeUserRequestRateLimit } from "@/lib/request-rate-limit";
-import { globalBirthProfileFromAccountRow } from "@/lib/server-owned-birth-profile";
+import { ACCOUNT_BIRTH_SELECT, globalBirthProfileFromAccountRow } from "@/lib/server-owned-birth-profile";
 import { createServerSupabaseClient } from "@/lib/supabase/server";
 import { getDailyStarlanguageAgent } from "@/mastra";
 
@@ -22,22 +22,6 @@ export const maxDuration = 20;
 
 type Profile = ReturnType<typeof globalBirthProfileFromAccountRow>;
 type BirthPayload = NonNullable<Awaited<ReturnType<typeof dailyProfilePayload>>>;
-const accountBirthColumns = [
-  "name",
-  "birth_date",
-  "reported_birth_time",
-  "active_birth_time",
-  "birth_time",
-  "birth_time_status",
-  "country_code",
-  "province_code",
-  "city_code",
-  "district_code",
-  "latitude",
-  "longitude",
-  "timezone_offset",
-  "timezone_id",
-].join(",");
 type CardSource = "engine_evidence" | "agent";
 type CacheEntry = { readonly day: string; readonly card: DailyStarlanguageCard; readonly source: CardSource };
 type Generated =
@@ -192,7 +176,7 @@ export async function POST(request: Request) {
 
   const { data: row, error } = await supabase
     .from("profiles")
-    .select(accountBirthColumns)
+    .select(ACCOUNT_BIRTH_SELECT)
     .eq("id", user.id)
     .maybeSingle();
   if (error || !row) return unavailable("birth_profile_incomplete");
diff --git a/frontend/src/app/api/synastry/route.ts b/frontend/src/app/api/synastry/route.ts
index fef96a90..9076ce84 100644
--- a/frontend/src/app/api/synastry/route.ts
+++ b/frontend/src/app/api/synastry/route.ts
@@ -3,6 +3,7 @@ import { z } from "zod";
 import { isProductEnabled } from "@/lib/product-access";
 import { consumeUserRequestRateLimit } from "@/lib/request-rate-limit";
 import {
+  ACCOUNT_BIRTH_SELECT,
   globalBirthProfileFromAccountRow,
   globalBirthProfileFromStoredChart,
 } from "@/lib/server-owned-birth-profile";
@@ -10,22 +11,6 @@ import { createServerSupabaseClient } from "@/lib/supabase/server";
 import { synastryBirthPayload } from "@/lib/global-birth-payloads";
 
 const apiBase = process.env.JYOTISH_API_BASE ?? "http://127.0.0.1:5200";
-const accountBirthColumns = [
-  "name",
-  "birth_date",
-  "reported_birth_time",
-  "active_birth_time",
-  "birth_time",
-  "birth_time_status",
-  "country_code",
-  "province_code",
-  "city_code",
-  "district_code",
-  "latitude",
-  "longitude",
-  "timezone_offset",
-  "timezone_id",
-].join(",");
 const synastryRequestSchema = z.object({
   partnerChartProfileId: z.string().uuid(),
   relationshipType: z.enum(["romance", "business", "family", "general"]).optional(),
@@ -168,7 +153,7 @@ export async function POST(request: Request) {
 
     const { data: selfRow, error: selfError } = await supabase
       .from("profiles")
-      .select(accountBirthColumns)
+      .select(ACCOUNT_BIRTH_SELECT)
       .eq("id", user.id)
       .maybeSingle();
     if (selfError || !selfRow) {
diff --git a/frontend/src/lib/chat-session-write-contract.ts b/frontend/src/lib/chat-session-write-contract.ts
index a0f060f1..0f2264bf 100644
--- a/frontend/src/lib/chat-session-write-contract.ts
+++ b/frontend/src/lib/chat-session-write-contract.ts
@@ -34,7 +34,9 @@ const chatSessionWriteObjectSchema = z.object({
   updated_at: z.string().datetime(),
 }).strict();
 
-function limitTranscriptSize<Schema extends z.ZodType<{ messages: Array<{ text: string }> }>>(schema: Schema) {
+function limitTranscriptSize<Output extends { messages: Array<{ text: string }> }>(
+  schema: z.ZodType<Output>,
+): z.ZodType<Output> {
   return schema.superRefine((value, context) => {
     const totalChars = value.messages.reduce((sum, message) => sum + message.text.length, 0);
     if (totalChars > CHAT_SESSION_MAX_TOTAL_MESSAGE_CHARS) {
diff --git a/frontend/src/lib/server-owned-birth-profile.ts b/frontend/src/lib/server-owned-birth-profile.ts
index f5c56e04..24def083 100644
--- a/frontend/src/lib/server-owned-birth-profile.ts
+++ b/frontend/src/lib/server-owned-birth-profile.ts
@@ -2,6 +2,9 @@ import type { GlobalBirthProfile } from "./global-birth-payloads.ts";
 
 const usableActiveStatuses = new Set(["accepted", "confirmed"]);
 
+export const ACCOUNT_BIRTH_SELECT =
+  "name,birth_date,reported_birth_time,active_birth_time,birth_time,birth_time_status,country_code,province_code,city_code,district_code,latitude,longitude,timezone_offset,timezone_id" as const;
+
 export type AccountBirthRow = Readonly<{
   name?: unknown;
   birth_date?: unknown;
@@ -19,6 +22,11 @@ export type AccountBirthRow = Readonly<{
   timezone_id?: unknown;
 }>;
 
+function asAccountBirthRow(row: unknown): AccountBirthRow {
+  if (!row || typeof row !== "object" || Array.isArray(row)) return {};
+  return row as AccountBirthRow;
+}
+
 function text(value: unknown): string | undefined {
   if (typeof value !== "string") return undefined;
   const trimmed = value.trim();
@@ -60,22 +68,23 @@ function selectedClock(row: AccountBirthRow): string | undefined {
   return reported ?? active;
 }
 
-export function globalBirthProfileFromAccountRow(row: AccountBirthRow): GlobalBirthProfile & {
+export function globalBirthProfileFromAccountRow(row: unknown): GlobalBirthProfile & {
   birthTimeStatus?: string;
 } {
+  const accountRow = asAccountBirthRow(row);
   return {
-    name: text(row.name),
-    date: calendarDate(row.birth_date),
-    time: selectedClock(row),
-    countryCode: text(row.country_code),
-    provinceCode: text(row.province_code),
-    cityCode: text(row.city_code),
-    districtCode: text(row.district_code),
-    latitude: finiteNumber(row.latitude) ?? null,
-    longitude: finiteNumber(row.longitude) ?? null,
-    timezoneOffset: finiteNumber(row.timezone_offset) ?? null,
-    timezoneId: text(row.timezone_id),
-    birthTimeStatus: text(row.birth_time_status),
+    name: text(accountRow.name),
+    date: calendarDate(accountRow.birth_date),
+    time: selectedClock(accountRow),
+    countryCode: text(accountRow.country_code),
+    provinceCode: text(accountRow.province_code),
+    cityCode: text(accountRow.city_code),
+    districtCode: text(accountRow.district_code),
+    latitude: finiteNumber(accountRow.latitude) ?? null,
+    longitude: finiteNumber(accountRow.longitude) ?? null,
+    timezoneOffset: finiteNumber(accountRow.timezone_offset) ?? null,
+    timezoneId: text(accountRow.timezone_id),
+    birthTimeStatus: text(accountRow.birth_time_status),
   };
 }
 
diff --git a/frontend/tests/chat-session-write.test.ts b/frontend/tests/chat-session-write.test.ts
index a007f9ed..0e7d87d7 100644
--- a/frontend/tests/chat-session-write.test.ts
+++ b/frontend/tests/chat-session-write.test.ts
@@ -1,7 +1,7 @@
 import assert from "node:assert/strict";
 import { readFileSync } from "node:fs";
 import test from "node:test";
-import { chatSessionWriteSchema, writeChatSession, type ChatSessionWrite } from "../src/lib/chat-session-write-contract.ts";
+import { chatSessionCreateSchema, chatSessionWriteSchema, writeChatSession, type ChatSessionWrite } from "../src/lib/chat-session-write-contract.ts";
 
 const sessionId = "11111111-1111-4111-8111-111111111111";
 const values = {
@@ -15,6 +15,17 @@ const values = {
 } satisfies ChatSessionWrite;
 
 
+test("create schema keeps the client-generated session id after transcript limits", () => {
+  const parsed = chatSessionCreateSchema.parse({
+    id: sessionId,
+    ...values,
+  });
+  const id: string = parsed.id;
+  assert.equal(id, sessionId);
+  assert.equal(parsed.title, values.title);
+  assert.equal(parsed.messages[0]?.text, "你好");
+});
+
 test("chat session schema preserves the safe agent execution receipt", () => {
   const receipt = {
     runId: "run-1",
@@ -99,6 +110,7 @@ test("session API owns create and update while answer UI keeps sync failures out
   const page = readFileSync(new URL("../src/app/page.tsx", import.meta.url), "utf8");
   const collectionRoute = readFileSync(new URL("../src/app/api/sessions/route.ts", import.meta.url), "utf8");
   const itemRoute = readFileSync(new URL("../src/app/api/sessions/[id]/route.ts", import.meta.url), "utf8");
+  const contract = readFileSync(new URL("../src/lib/chat-session-write-contract.ts", import.meta.url), "utf8");
 
   assert.match(page, /writeChatSession\(session\.id, values, mode\)/);
   assert.doesNotMatch(page, /云端同步失败.*回答仍保留在当前页面/);
@@ -109,6 +121,9 @@ test("session API owns create and update while answer UI keeps sync failures out
   assert.match(itemRoute, /readChatSessionJson/);
   assert.match(collectionRoute, /ChatSessionBodyTooLargeError/);
   assert.match(itemRoute, /ChatSessionBodyTooLargeError/);
+  assert.match(collectionRoute, /const \{ id, \.\.\.values \} = parsed\.data/);
+  assert.match(contract, /function limitTranscriptSize<Output extends \{ messages: Array<\{ text: string \}> \}>/);
+  assert.match(contract, /\): z\.ZodType<Output> \{/);
 });
 
 
diff --git a/frontend/tests/server-owned-birth-profile.test.ts b/frontend/tests/server-owned-birth-profile.test.ts
index ad673f1e..58a58f8c 100644
--- a/frontend/tests/server-owned-birth-profile.test.ts
+++ b/frontend/tests/server-owned-birth-profile.test.ts
@@ -1,6 +1,8 @@
 import assert from "node:assert/strict";
 import test from "node:test";
+import { readFileSync } from "node:fs";
 import {
+  ACCOUNT_BIRTH_SELECT,
   globalBirthProfileFromAccountRow,
   globalBirthProfileFromStoredChart,
 } from "../src/lib/server-owned-birth-profile.ts";
@@ -74,3 +76,18 @@ test("a stored chart without a clock cannot be used for synastry", () => {
   assert.equal(globalBirthProfileFromStoredChart({ date: "1990-01-01", name: "对方" }), null);
   assert.equal(globalBirthProfileFromStoredChart(null), null);
 });
+
+test("daily and synastry routes share a literal account-birth select string", () => {
+  const daily = readFileSync(new URL("../src/app/api/daily-starlanguage/route.ts", import.meta.url), "utf8");
+  const synastry = readFileSync(new URL("../src/app/api/synastry/route.ts", import.meta.url), "utf8");
+  assert.equal(
+    ACCOUNT_BIRTH_SELECT,
+    "name,birth_date,reported_birth_time,active_birth_time,birth_time,birth_time_status,country_code,province_code,city_code,district_code,latitude,longitude,timezone_offset,timezone_id",
+  );
+  assert.match(daily, /select\(ACCOUNT_BIRTH_SELECT\)/);
+  assert.match(synastry, /select\(ACCOUNT_BIRTH_SELECT\)/);
+  assert.doesNotMatch(daily, /accountBirthColumns/);
+  assert.doesNotMatch(synastry, /accountBirthColumns/);
+  assert.doesNotMatch(daily, /\.join\(",\"\)/);
+  assert.doesNotMatch(synastry, /\.join\(",\"\)/);
+});