diff --git a/CHANGELOG.md b/CHANGELOG.md
index bdd1512c..41cf6150 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,10 @@
 
 - 本命盘和月亮盘的上升行现在有星宿、宿主和 pada。状态写「不适用」，不再是空横杠。分盘等表里居中的那几列，表头也居中。当前大运不再画左侧那条线，浅色底还在。已经打开过的星盘会重新计算。Skill 版本不变（BUG-1352、BUG-1353）。
 
+## 2026-10-15 — 旧版校正评分轮询不再中途报错（待合入 staging）
+
+- 旧版生时校正在查询评分进度时，会因为多读了一步数据库结果而直接失败。现在按数据库实际返回的那一行读取。其他查询行为不变。Skill 版本不变（BUG-1351）。
+
 ## 2026-10-14 — 生产可以在测试环境后面只多了文档时照常发布（待合入 staging）
 
 - 生产发布用最近一次测过的代码版本。测试环境后面如果只多了文档，不再挡住发布。生产环境拒绝测试用验证码，网址末尾多一个斜杠也拒绝。迁移演练在主机上不再依赖本机 Node；演练库删不掉会明确失败。只多了文档时，回退不再被拒绝。Skill 版本不变（BUG-1348、BUG-1349）。
diff --git a/docs/BUG_HISTORY.md b/docs/BUG_HISTORY.md
index 90582d0f..30a95ab1 100644
--- a/docs/BUG_HISTORY.md
+++ b/docs/BUG_HISTORY.md
@@ -36134,6 +36134,22 @@
 - 复发自：无。
 - 修复版本：分支 `codex/release-path-production-20261014`。编号接在 BUG-1349 之后。
 
+## BUG-1351 | 自托管下旧版校正评分轮询 rpc 结果多读一步，必抛 TypeError
+
+- 状态：resolved
+- 首次发现：2026-10-13
+- 最近更新：2026-10-15
+- 影响面：旧版生时校正（legacy-guided-v1）的评分轮询，`POST /api/birth-time-journey` 且类型为 `poll_scoring`
+- 用户现象：这类存量校正在查看评分进度时直接失败，页面拿不到「已领取 / 处理中 / 已完成」。
+- 触发条件：自托管数据库（当前 staging 与生产都是这条路径）上，对 `claim_birth_time_scoring_job` 的返回值再调用 `.single()`。该函数返回的是表格里的一行，本地适配层把整表收成数组，没有 `.single`。
+- 根因：数据访问层被标成完整的 Supabase 客户端，编译器看不出适配层没有 `.single`。原有测试用内存仓库，没有走过真实适配层。
+- 修复：去掉 `.single()`。返回值如果是数组就取第一行，如果已是单行对象就直接用，再做原来的字段校验。Supabase 回滚分支不带 `.single()` 时同样返回数组，行为一致。
+- 验证：修复前两条单元测试都抛出 `supabase.rpc(...).single is not a function`。修复后这两条通过。另有一条真实迁移测试：函数返回值是数组，认领结果为已领取，且不抛错。`tsc --noEmit` 0 错。
+- 防复发：适配层 `implements` 自己的 `DataClient`。新增调用如果用了适配层没有的方法，编译直接失败。评分认领有数据库级用例。
+- 相关记录：BUG-124、BUG-130、BUG-576、BUG-926
+- 复发自：无
+- 修复版本：分支 `codex/data-layer-types-20261013`。任务书预留 BUG-1343；开工时本文件最大号已是 BUG-1350，1343 没有条目。按「从当前最大号往后」编为 BUG-1351。
+
 ## BUG-1352 | 星盘页上升行的星宿三项被排盘接口丢掉
 
 - 状态：resolved
diff --git a/docs/tasks/PROGRESS-data-layer-types-20261013.md b/docs/tasks/PROGRESS-data-layer-types-20261013.md
new file mode 100644
index 00000000..3fbf0f66
--- /dev/null
+++ b/docs/tasks/PROGRESS-data-layer-types-20261013.md
@@ -0,0 +1,92 @@
+# PROGRESS · 数据访问层 DataClient 类型（第一阶段）
+
+- 分支：`codex/data-layer-types-20261013`
+- 基线：`origin/staging` `9274491681f6fcacbc87e3797441d2c5221de874`
+- 前置：`origin/codex/node-runtime-resources-20261013` 已是 `origin/staging` 的祖先（`merge-base --is-ancestor` 退出码 0）。`local-postgres-client-core.ts` 只加了 `import type` 和两处 `implements`。
+- `frontend/src/lib/rectification-agentic/session.ts` 已不在，本单没有改它。
+- 编号：任务书预留 BUG-1343。开工时 `docs/BUG_HISTORY.md` 最大号是 BUG-1350，1343 没有条目。按台账规则从最大号往后，记为 **BUG-1351**。
+
+## T1 · 编译器暴露的 2 条
+
+`DataClient` 换上之后、缺陷尚未修时，`tsc --noEmit` 退出码 2，恰好 2 条：
+
+```
+src/app/api/chart-profiles/route.ts(59,40): error TS7006: Parameter 'row' implicitly has an 'any' type.
+src/lib/birth-time-scoring-job-store.ts(103,10): error TS2339: Property 'single' does not exist on type 'Promise<Readonly<{ data: any; error: Readonly<{ message: string; code?: string | undefined; }> | null; count?: number | null | undefined; }>>'.
+```
+
+`grep`：`as unknown as SupabaseClient` 在 `frontend/src` 无结果。`@supabase/supabase-js` 只剩 `admin-client-core.ts` 的 `createClient` 回滚分支。
+
+## T2 · 缺陷修复红转绿
+
+修复前，`claimScoringJob` 对返回数组的假 `rpc` 调用 `.single()`：
+
+- `claimScoringJob reads the first row when rpc returns an array`：失败，`TypeError: supabase.rpc(...).single is not a function`
+- `claimScoringJob also accepts the single-object rpc shape`：同样失败
+
+去掉 `.single()` 并兼容数组与单对象之后，这两条通过。真实迁移用例 `claim_birth_time_scoring_job returns an array and claimScoringJob accepts it` 通过：`data` 是数组，第一行 `claim_state` 为 `claimed`，store 返回 `{ kind: "claimed", algorithmVersion }`。第一次启动测试库时迁移进程只留下笼统的 `database migration failed`（脚本会把非预期异常收成这一句），容器未到 Healthy。同一条用例在容器 Healthy 后重跑通过。
+
+`chart-profiles/route.ts` 的 `row` 标为 `unknown`。
+
+修完后 `tsc --noEmit` 退出码 0。`npm run lint` 退出码 0，0 error，123 warning（与改动前的存量警告数量一致，本单没有新增 warning）。
+
+## T3 · 转译差分
+
+类型层改动用 esbuild 0.28.1、`--format=esm`、`--tsconfig=frontend/tsconfig.json`，旧文件与新文件都按这份 tsconfig 转译。除 T2 的两个文件和新建的 `data-client.ts` 外，全部 `SAME`：
+
+- `src/lib/birth-time-journey-case-loader.ts`
+- `src/lib/birth-time-journey-store.ts`
+- `src/lib/birth-time-journey-turn-persistence.ts`
+- `src/lib/db/local-postgres-client-core.ts`
+- `src/lib/rectification-agentic/v9/case-service.ts`
+- `src/lib/rectification-agentic/v9/product-domain.ts`
+- `src/lib/rectification-agentic/v9/tool-service.ts`（只改了一句注释；转译后注释被去掉，产物相同）
+- `src/lib/rectification-in-chat-server.ts`
+- `src/lib/supabase/admin-client-core.ts`
+- `src/lib/supabase/server.ts`
+- `src/mastra/rectification-v9-tools.ts`
+
+任务书把旧文件写到系统临时目录再转译。esbuild 0.28.1 会沿文件所在目录寻找 `tsconfig.json`。临时目录找不到本仓库的 `tsconfig.json`（`target` 为 ES2017），类字段的转译结果会和仓库内文件不一致，即使源码只有类型或注释差别也会报 DIFF。两边都带上同一份 `--tsconfig` 后为 SAME。这不是运行时变化。
+
+## T4 · 把 data 收成 unknown 的错误清单
+
+临时把 `UntypedData` 改成 `unknown` 后 `tsc --noEmit` 退出码 2，共 93 条、12 个文件。随后已改回 `any`。
+
+| 条数 | 文件 |
+| ---: | --- |
+| 24 | `src/app/api/account/route.ts` |
+| 17 | `src/app/api/consult/route.ts`（其中 1 条是 `DataClient` 不能赋给 `GuardedTitleClient`，`consult/route.ts` 约 1055 行） |
+| 16 | `src/app/api/consult/status/route.ts` |
+| 12 | `src/app/api/payment/epay/status/route.ts` |
+| 7 | `src/lib/epay/availability.ts` |
+| 5 | `src/lib/rectification-agentic/v9/product-domain.ts` |
+| 4 | `src/app/api/sessions/route.ts` |
+| 3 | `src/lib/rectification-agentic/v9/agent-route-request.ts` |
+| 2 | `src/app/api/chart-profiles/[id]/route.ts` |
+| 1 | `src/app/api/account/avatar/route.ts` |
+| 1 | `src/app/api/chart-profiles/route.ts` |
+| 1 | `src/app/api/sessions/[id]/route.ts` |
+
+和任务书写作时的 122 条相比，`consult/route.ts` 少了 10 条，`chart-profiles/route.ts` 少了 1 条（本单已把 `row` 标成 `unknown`）。没有单独再出现一条 `session-title-guard.ts` 的错误，`GuardedTitleClient` 那条记在 `consult/route.ts` 里。这些留给第二阶段，本单没有改那些业务文件。
+
+## test:db
+
+`npm run test:db`（`tsx --test --test-concurrency=1 tests/database-*.test.ts`）约 19 分钟，退出码 1。汇总：85 条，通过 72，失败 13，取消 0，跳过 0。
+
+失败的 13 条与 `tools/agent-loop/windows-known-failures.txt` 逐条一致，没有多出来的失败：
+
+- staging backups are encrypted, atomic, private, and retain the newest three
+- rejects destructive backup directory aliases and symlink components before mutation
+- rejects unsafe writable backup parents before creating the target
+- rejects a direct canonical sticky shared backup directory before chmod
+- creates every absent backup path component privately despite a permissive caller umask
+- same-second backups publish once without overwriting the completed archive
+- find enumeration failures preserve existing backups and do not report completion
+- refuses full disks and removes a failed-pipeline partial file
+- database env validator accepts punctuated literal required secrets
+- database env validator enforces an explicit staging owner uid without printing values
+- database env validator accepts a private valid file without printing values
+- personal report job migration is atomic, lease-bound, recoverable, and owner read-only
+- personal report sections enforce owner-read RLS and service-owned durable transitions
+
+本单新增的 3 条（两条假客户端、一条真实迁移认领）都在通过的 72 条里。
diff --git a/docs/tasks/README.md b/docs/tasks/README.md
index bd829596..6a5ab0fe 100644
--- a/docs/tasks/README.md
+++ b/docs/tasks/README.md
@@ -492,5 +492,5 @@
 | `TASK-python-hygiene-20261013.md` | — | 免费层排队开关报反、静默吞异常、功能吉凶兜底合一、测试专用脚本归位（BUG-1340） | 待领取（排队：pl9-render-split） | `codex/python-hygiene-20261013` |
 | `TASK-dasha-unify-20261013.md` | — | /api/dasha 改走引擎同一套实现、删占位注册表、Ashtottari 出生余额（BUG-1341、1344） | 待领取（排队：python-hygiene） | `codex/dasha-unify-20261013` |
 | `TASK-api-server-service-extract-20261013.md` | — | API 单体第一阶段：拆出不带 HTTP 的计算类，生产伪造 handler 归零 | 待领取（排队：dasha-unify） | `codex/api-server-service-extract-20261013` |
-| `TASK-data-layer-types-20261013.md` | — | 数据访问层改用自己的 DataClient 类型第一阶段（BUG-1343） | 待领取（排队：node-runtime-resources） | `codex/data-layer-types-20261013` |
+| `TASK-data-layer-types-20261013.md` | `PROGRESS-data-layer-types-20261013.md` | 数据访问层改用自己的 DataClient 类型第一阶段（BUG-1351；任务书预留的 1343 已被更大编号越过） | 待验收 | `codex/data-layer-types-20261013` |
 | `TASK-contracts-helpers-dedupe-20261013.md` | — | 前后端契约与小工具去重第一阶段 | 待领取（排队：frontend-dead-code、consult-route-split） | `codex/contracts-helpers-dedupe-20261013` |
diff --git a/frontend/src/app/api/chart-profiles/route.ts b/frontend/src/app/api/chart-profiles/route.ts
index 24eefec2..5df64576 100644
--- a/frontend/src/app/api/chart-profiles/route.ts
+++ b/frontend/src/app/api/chart-profiles/route.ts
@@ -56,7 +56,7 @@ export async function GET() {
       .order("updated_at", { ascending: false });
 
     if (error) throw error;
-    const profiles = (data ?? []).map((row) => toClientProfile(row as Record<string, unknown>));
+    const profiles = (data ?? []).map((row: unknown) => toClientProfile(row as Record<string, unknown>));
     return NextResponse.json({
       profiles,
       limit: MAX_SAVED_SUBJECTS,
diff --git a/frontend/src/lib/birth-time-journey-case-loader.ts b/frontend/src/lib/birth-time-journey-case-loader.ts
index b5b32463..9621ac50 100644
--- a/frontend/src/lib/birth-time-journey-case-loader.ts
+++ b/frontend/src/lib/birth-time-journey-case-loader.ts
@@ -1,4 +1,4 @@
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import { z } from "zod";
 import {
   parseRectificationQuestionnaire,
@@ -34,7 +34,7 @@ export type JourneyLoadClient = {
   from(table: string): { select(columns: string): JourneyLoadQuery };
 };
 
-export function createJourneyLoadClient(supabase: SupabaseClient): JourneyLoadClient {
+export function createJourneyLoadClient(supabase: DataClient): JourneyLoadClient {
   return {
     from(table) {
       return {
diff --git a/frontend/src/lib/birth-time-journey-store.ts b/frontend/src/lib/birth-time-journey-store.ts
index 1f5571c8..44370ec1 100644
--- a/frontend/src/lib/birth-time-journey-store.ts
+++ b/frontend/src/lib/birth-time-journey-store.ts
@@ -1,6 +1,6 @@
 import "server-only";
 
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import type {
   BirthTimeJourneyStore,
 } from "./birth-time-journey-service.ts";
@@ -24,7 +24,7 @@ import { createDynamicScoringJobStore } from "./birth-time-dynamic-scoring-job-s
 export { BirthTimeJourneyStoreError } from "./birth-time-journey-turn-persistence.ts";
 
 export function createSupabaseBirthTimeJourneyStore(
-  supabase: SupabaseClient,
+  supabase: DataClient,
   now: () => Date = () => new Date(),
 ): BirthTimeJourneyStore {
   const loadClient = createJourneyLoadClient(supabase);
diff --git a/frontend/src/lib/birth-time-journey-turn-persistence.ts b/frontend/src/lib/birth-time-journey-turn-persistence.ts
index 3ca50096..588a105a 100644
--- a/frontend/src/lib/birth-time-journey-turn-persistence.ts
+++ b/frontend/src/lib/birth-time-journey-turn-persistence.ts
@@ -1,4 +1,4 @@
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import { z } from "zod";
 import type { JourneySnapshot } from "./birth-time-journey.ts";
 import type { LegacyStoredRectificationCase, StoredRectificationCase } from "./birth-time-journey-service.ts";
@@ -56,7 +56,7 @@ function canonicalAskedDomains(input: readonly EvidenceDomain[]): readonly Evide
 }
 
 export function createJourneyTurnPersistence(
-  supabase: SupabaseClient,
+  supabase: DataClient,
   loadCase: (userId: string, caseId: string) => Promise<StoredRectificationCase | null>,
 ) {
   return {
diff --git a/frontend/src/lib/birth-time-scoring-job-store.ts b/frontend/src/lib/birth-time-scoring-job-store.ts
index 8fb36d79..3d13559c 100644
--- a/frontend/src/lib/birth-time-scoring-job-store.ts
+++ b/frontend/src/lib/birth-time-scoring-job-store.ts
@@ -1,4 +1,4 @@
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import { z } from "zod";
 import { BirthTimeScoringJobError } from "./birth-time-scoring-job.ts";
 import type {
@@ -58,7 +58,7 @@ async function requireReloaded(
 }
 
 export function createSupabaseScoringJobStore(
-  supabase: SupabaseClient,
+  supabase: DataClient,
   loadCase: (userId: string, caseId: string) => Promise<StoredRectificationCase | null>,
 ): ScoringStoreMethods {
   return {
@@ -91,18 +91,17 @@ export function createSupabaseScoringJobStore(
     },
 
     async claimScoringJob(identity) {
-      const { data, error } = await supabase
-        .rpc("claim_birth_time_scoring_job", {
-          p_user_id: identity.userId,
-          p_case_id: identity.caseId,
-          p_job_id: identity.jobId,
-          p_evidence_fingerprint: identity.evidenceFingerprint,
-          p_algorithm_version: identity.algorithmVersion,
-          p_now: identity.now,
-        })
-        .single();
+      const { data, error } = await supabase.rpc("claim_birth_time_scoring_job", {
+        p_user_id: identity.userId,
+        p_case_id: identity.caseId,
+        p_job_id: identity.jobId,
+        p_evidence_fingerprint: identity.evidenceFingerprint,
+        p_algorithm_version: identity.algorithmVersion,
+        p_now: identity.now,
+      });
       if (error) throw mapScoringRpcError(error.message, error.code);
-      const parsed = claimSchema.safeParse(data);
+      const row = Array.isArray(data) ? data[0] ?? null : data;
+      const parsed = claimSchema.safeParse(row);
       if (!parsed.success) throw new BirthTimeJourneyStoreError("load_case");
       return {
         kind: parsed.data.claim_state,
diff --git a/frontend/src/lib/db/data-client.ts b/frontend/src/lib/db/data-client.ts
new file mode 100644
index 00000000..6b65cc63
--- /dev/null
+++ b/frontend/src/lib/db/data-client.ts
@@ -0,0 +1,46 @@
+export type DataQueryError = Readonly<{ message: string; code?: string }>;
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any -- phase 1: equals SupabaseClient<any>; phase 2 narrows per table
+type UntypedData = any;
+
+export type DataQueryResult = Readonly<{
+  data: UntypedData;
+  error: DataQueryError | null;
+  count?: number | null;
+}>;
+
+export interface DataQueryBuilder extends PromiseLike<DataQueryResult> {
+  select(columns?: string): DataQueryBuilder;
+  insert(value: Record<string, unknown> | readonly Record<string, unknown>[]): DataQueryBuilder;
+  upsert(
+    value: Record<string, unknown> | readonly Record<string, unknown>[],
+    options?: { onConflict?: string },
+  ): DataQueryBuilder;
+  update(values: Record<string, unknown>): DataQueryBuilder;
+  delete(options?: { count?: string }): DataQueryBuilder;
+  eq(column: string, value: unknown): DataQueryBuilder;
+  neq(column: string, value: unknown): DataQueryBuilder;
+  gt(column: string, value: unknown): DataQueryBuilder;
+  lte(column: string, value: unknown): DataQueryBuilder;
+  like(column: string, value: unknown): DataQueryBuilder;
+  in(column: string, value: readonly unknown[]): DataQueryBuilder;
+  is(column: string, value: unknown): DataQueryBuilder;
+  not(column: string, operator: string, value: unknown): DataQueryBuilder;
+  or(expression: string): DataQueryBuilder;
+  order(column: string, options?: { ascending?: boolean }): DataQueryBuilder;
+  limit(value: number): DataQueryBuilder;
+  abortSignal(signal: AbortSignal): DataQueryBuilder;
+  single(): Promise<DataQueryResult>;
+  maybeSingle(): Promise<DataQueryResult>;
+}
+
+export interface DataClient {
+  readonly auth: Readonly<{
+    getUser: () => Promise<{
+      data: { user: { id: string; email?: string | null } | null };
+      error: unknown;
+    }>;
+  }>;
+  from(table: string): DataQueryBuilder;
+  rpc(fn: string, args?: Readonly<Record<string, unknown>>): Promise<DataQueryResult>;
+}
diff --git a/frontend/src/lib/db/local-postgres-client-core.ts b/frontend/src/lib/db/local-postgres-client-core.ts
index a0c2b5a9..4439cb81 100644
--- a/frontend/src/lib/db/local-postgres-client-core.ts
+++ b/frontend/src/lib/db/local-postgres-client-core.ts
@@ -1,4 +1,5 @@
 import { Pool, type PoolClient } from "pg";
+import type { DataClient, DataQueryBuilder } from "./data-client";
 
 type LocalIdentity = Readonly<{ id: string; email: string | null }> | null;
 export type LocalDatabaseRole = "authenticated" | "service_role";
@@ -457,7 +458,7 @@ export function queryValue(type: string | undefined, value: unknown): unknown {
   return value;
 }
 
-class LocalPostgresQueryBuilder implements PromiseLike<QueryResult> {
+class LocalPostgresQueryBuilder implements DataQueryBuilder {
   private selectedColumns: string[] | null = null;
   private mutation: Mutation | null = null;
   private readonly filters: Filter[] = [];
@@ -863,7 +864,7 @@ function castType(value: string): string {
   return value;
 }
 
-export class LocalPostgresDataClient {
+export class LocalPostgresDataClient implements DataClient {
   readonly auth: Readonly<{
     getUser: () => Promise<
       Readonly<{
diff --git a/frontend/src/lib/rectification-agentic/v9/case-service.ts b/frontend/src/lib/rectification-agentic/v9/case-service.ts
index db9daa26..37559fba 100644
--- a/frontend/src/lib/rectification-agentic/v9/case-service.ts
+++ b/frontend/src/lib/rectification-agentic/v9/case-service.ts
@@ -8,7 +8,7 @@
  */
 import { createHash } from "node:crypto";
 import { requestCandidateIntervals, type DatedCandidateRange } from "../core/candidate-window.ts";
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import { resolveMissingBirthTimezoneOffset } from "../../birth-profile-timezone.ts";
 import { declaredClockRange } from "../../declared-birth-window.ts";
 import {
@@ -43,7 +43,7 @@ import {
   type RectificationEntrySummary,
 } from "./open-request.ts";
 
-type AccountingClient = SupabaseClient;
+type AccountingClient = DataClient;
 
 export type V9BaselineSnapshot = Readonly<{
   birth_date: string;
diff --git a/frontend/src/lib/rectification-agentic/v9/product-domain.ts b/frontend/src/lib/rectification-agentic/v9/product-domain.ts
index 60e10495..d151cd4f 100644
--- a/frontend/src/lib/rectification-agentic/v9/product-domain.ts
+++ b/frontend/src/lib/rectification-agentic/v9/product-domain.ts
@@ -1,4 +1,4 @@
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import { RectificationCaseServiceError } from "./case-service.ts";
 import type { OpenRectificationCaseRequest } from "./open-request.ts";
 
@@ -17,7 +17,7 @@ const domainsBySessionTheme: Readonly<Record<string, string>> = {
 
 /** Only an owned persisted consultation is a product-domain source. */
 export async function resolveRectificationProductDomain(
-  client: SupabaseClient,
+  client: DataClient,
   userId: string,
   request: OpenRectificationCaseRequest,
 ): Promise<string> {
diff --git a/frontend/src/lib/rectification-agentic/v9/tool-service.ts b/frontend/src/lib/rectification-agentic/v9/tool-service.ts
index 0e62ff60..92a4e5ff 100644
--- a/frontend/src/lib/rectification-agentic/v9/tool-service.ts
+++ b/frontend/src/lib/rectification-agentic/v9/tool-service.ts
@@ -44,7 +44,7 @@ import { decisionStateFingerprint } from "../core/decision-fingerprint";
 const uuidPattern = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i;
 
 /**
- * Minimal structural RPC client. SupabaseClient satisfies this; tests can
+ * Minimal structural RPC client. DataClient satisfies this; tests can
  * pass a fake with a single rpc() method.
  */
 export type RectificationRpcClient = {
diff --git a/frontend/src/lib/rectification-in-chat-server.ts b/frontend/src/lib/rectification-in-chat-server.ts
index 4ec8d784..2414a299 100644
--- a/frontend/src/lib/rectification-in-chat-server.ts
+++ b/frontend/src/lib/rectification-in-chat-server.ts
@@ -1,6 +1,6 @@
 import "server-only";
 
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import { resolveFeaturePricing } from "@/lib/feature-pricing";
 import { isProductEnabled } from "@/lib/product-access";
 import { getRectificationEntrySummary } from "@/lib/rectification-agentic/v9/case-service";
@@ -27,7 +27,7 @@ import {
 
 /** C3: whether the offer card may be shown, decided by the server and never by the model. */
 export async function decideRectificationOffer(input: {
-  accounting: SupabaseClient;
+  accounting: DataClient;
   userId: string;
   subjectRole: "self" | "other";
   modelId: string;
@@ -42,7 +42,7 @@ export async function decideRectificationOffer(input: {
 
 type SessionRow = { id: string; messages: unknown; session_type?: string | null };
 
-async function readConsultationSession(client: SupabaseClient, userId: string, sessionId: string): Promise<SessionRow | null> {
+async function readConsultationSession(client: DataClient, userId: string, sessionId: string): Promise<SessionRow | null> {
   const { data, error } = await client
     .from("chat_sessions")
     .select("id,messages,session_type")
@@ -54,7 +54,7 @@ async function readConsultationSession(client: SupabaseClient, userId: string, s
   return (row.session_type ?? "consultation") === "consultation" ? row : null;
 }
 
-async function writeMessages(client: SupabaseClient, userId: string, sessionId: string, messages: unknown[]): Promise<boolean> {
+async function writeMessages(client: DataClient, userId: string, sessionId: string, messages: unknown[]): Promise<boolean> {
   const { error } = await client
     .from("chat_sessions")
     .update({ messages })
@@ -71,7 +71,7 @@ async function writeMessages(client: SupabaseClient, userId: string, sessionId:
  * Does not touch consultation_requests.
  */
 export async function persistOpenedDirectOffer(input: {
-  client: SupabaseClient;
+  client: DataClient;
   userId: string;
   sessionId: string;
   sentence: string;
@@ -96,7 +96,7 @@ export async function persistOpenedDirectOffer(input: {
 
 /** C4: after a case opens from a consultation, bind the offer card to it. Best effort. */
 export async function bindRectificationSource(input: {
-  client: SupabaseClient;
+  client: DataClient;
   userId: string;
   sourceSessionId: string;
   caseId: string;
@@ -118,7 +118,7 @@ const SOURCE_SEARCH_LIMIT = 20;
  * from history has none.
  */
 export async function findRectificationSource(
-  client: SupabaseClient,
+  client: DataClient,
   userId: string,
   caseId: string,
 ): Promise<RectificationSource | null> {
@@ -139,8 +139,8 @@ export async function findRectificationSource(
  * never from the browser.
  */
 export async function returnToRectificationSource(input: {
-  client: SupabaseClient;
-  accounting: SupabaseClient;
+  client: DataClient;
+  accounting: DataClient;
   userId: string;
   caseId: string;
   now?: () => Date;
diff --git a/frontend/src/lib/supabase/admin-client-core.ts b/frontend/src/lib/supabase/admin-client-core.ts
index 2a462b90..d30291ba 100644
--- a/frontend/src/lib/supabase/admin-client-core.ts
+++ b/frontend/src/lib/supabase/admin-client-core.ts
@@ -1,11 +1,12 @@
-import { createClient, type SupabaseClient } from "@supabase/supabase-js";
+import { createClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import { createLocalPostgresDataClient } from "@/lib/db/local-postgres-client-core";
 import {
   getSupabaseUrl,
   SupabaseConfigurationError,
 } from "./config";
 
-export function createAdminSupabaseClient() {
+export function createAdminSupabaseClient(): DataClient {
   if (process.env.AUTH_PROVIDER?.trim() === "self-hosted") {
     const connectionString = process.env.SERVICE_DATABASE_URL?.trim();
     if (!connectionString) {
@@ -18,7 +19,7 @@ export function createAdminSupabaseClient() {
       connectionString,
       null,
       "service_role",
-    ) as unknown as SupabaseClient;
+    ) as DataClient;
   }
   const url = getSupabaseUrl();
   const serviceRoleKey = process.env.SUPABASE_SERVICE_ROLE_KEY;
@@ -26,9 +27,10 @@ export function createAdminSupabaseClient() {
     throw new SupabaseConfigurationError(["SUPABASE_SERVICE_ROLE_KEY"]);
   }
 
+  // 回滚分支，运行时形状是超集
   return createClient(url, serviceRoleKey, {
     auth: { autoRefreshToken: false, persistSession: false },
-  });
+  }) as unknown as DataClient;
 }
 
 export function isAdminEmail(email: string | null | undefined) {
diff --git a/frontend/src/lib/supabase/server.ts b/frontend/src/lib/supabase/server.ts
index 351603bd..c9c3fc38 100644
--- a/frontend/src/lib/supabase/server.ts
+++ b/frontend/src/lib/supabase/server.ts
@@ -1,8 +1,8 @@
 import "server-only";
 
 import { createServerClient } from "@supabase/ssr";
-import type { SupabaseClient } from "@supabase/supabase-js";
 import { cookies, headers } from "next/headers";
+import type { DataClient } from "@/lib/db/data-client";
 import { createLocalPostgresDataClient } from "@/lib/db/local-postgres-client";
 import { readDatabaseUrl } from "@/lib/db/config";
 import { getIdentityAuthServices } from "@/modules/identity/auth";
@@ -11,7 +11,7 @@ import { getSupabasePublicConfig } from "./config";
 
 export async function createServerSupabaseClient(options?: {
   readonly disableCookieCache?: boolean;
-}) {
+}): Promise<DataClient> {
   if (process.env.AUTH_PROVIDER?.trim() === "self-hosted") {
     const requestHeaders = new Headers(await headers());
     const session = await readIdentitySession(
@@ -22,11 +22,12 @@ export async function createServerSupabaseClient(options?: {
     return createLocalPostgresDataClient(
       readDatabaseUrl(process.env, "APP_DATABASE_URL"),
       session ? { id: session.user.id, email: session.user.email } : null,
-    ) as unknown as SupabaseClient;
+    ) as DataClient;
   }
   const { url, anonKey } = getSupabasePublicConfig();
   const cookieStore = await cookies();
 
+  // 回滚分支，运行时形状是超集
   return createServerClient(url, anonKey, {
     cookies: {
       getAll: () => cookieStore.getAll(),
@@ -40,5 +41,5 @@ export async function createServerSupabaseClient(options?: {
         }
       },
     },
-  });
+  }) as unknown as DataClient;
 }
diff --git a/frontend/src/mastra/rectification-v9-tools.ts b/frontend/src/mastra/rectification-v9-tools.ts
index 41a66610..315c4aa9 100644
--- a/frontend/src/mastra/rectification-v9-tools.ts
+++ b/frontend/src/mastra/rectification-v9-tools.ts
@@ -12,7 +12,7 @@
 import { windowIntervalsWidth } from "../lib/rectification-agentic/core/candidate-window.ts";
 import { createTool } from "@mastra/core/tools";
 import { z } from "zod";
-import type { SupabaseClient } from "@supabase/supabase-js";
+import type { DataClient } from "@/lib/db/data-client";
 import type { PublicRectificationMethod } from "@/lib/rectification-agentic/v9/public-receipt";
 import {
   canonicalToolInputFingerprint,
@@ -196,7 +196,7 @@ export type RectificationV9Context = Readonly<{
   turnId: string;
   attemptId?: string;
   userMessage?: string | null;
-  accounting: SupabaseClient;
+  accounting: DataClient;
   engineBase?: string;
   decision?: RectificationDecision;
   productDelivery?: import("../lib/rectification-agentic/v9/product-delivery.ts").ProductDelivery | null;
diff --git a/frontend/tests/database-scoring-job-claim-shape.test.ts b/frontend/tests/database-scoring-job-claim-shape.test.ts
new file mode 100644
index 00000000..367a7bf3
--- /dev/null
+++ b/frontend/tests/database-scoring-job-claim-shape.test.ts
@@ -0,0 +1,157 @@
+import assert from "node:assert/strict";
+import { spawnSync } from "node:child_process";
+import { fileURLToPath } from "node:url";
+import test from "node:test";
+
+import {
+  closeLocalPostgresDataPools,
+  createLocalPostgresDataClient,
+} from "../src/lib/db/local-postgres-client-core.ts";
+import type { DataClient } from "../src/lib/db/data-client.ts";
+import { birthTimeScoringAlgorithmVersion } from "../src/lib/birth-time-scoring-job.ts";
+import { createSupabaseScoringJobStore } from "../src/lib/birth-time-scoring-job-store.ts";
+import { startPostgresFixture } from "./helpers/postgres-fixture.ts";
+
+const runnerPath = fileURLToPath(new URL("../scripts/db-migrate.mjs", import.meta.url));
+
+function dockerAvailable(): boolean {
+  return spawnSync("docker", ["version", "--format", "{{.Server.Version}}"], {
+    encoding: "utf8",
+    stdio: "ignore",
+  }).status === 0;
+}
+
+const skipWithoutDocker = dockerAvailable() ? false : "docker unavailable on this host";
+
+const ids = {
+  user: "e1111111-1111-4111-8111-111111111111",
+  caseId: "e2222222-2222-4222-8222-222222222222",
+  job: "e3333333-3333-4333-8333-333333333333",
+  shapeJob: "e4444444-4444-4444-8444-444444444444",
+};
+
+const fingerprint = "claim-shape-fingerprint";
+
+function sqlLiteral(value: string): string {
+  return `'${value.replaceAll("'", "''")}'`;
+}
+
+const identity = {
+  userId: ids.user,
+  caseId: ids.caseId,
+  jobId: ids.job,
+  evidenceFingerprint: fingerprint,
+  algorithmVersion: birthTimeScoringAlgorithmVersion,
+  now: "2026-10-15T00:00:00.000Z",
+};
+
+test("claimScoringJob reads the first row when rpc returns an array", async () => {
+  const rpc = async () => ({
+    data: [{ claim_state: "claimed", algorithm_version: birthTimeScoringAlgorithmVersion }],
+    error: null,
+  });
+  const store = createSupabaseScoringJobStore({ rpc } as unknown as DataClient, async () => null);
+  const claim = await store.claimScoringJob(identity);
+  assert.deepEqual(claim, {
+    kind: "claimed",
+    algorithmVersion: birthTimeScoringAlgorithmVersion,
+  });
+});
+
+test("claimScoringJob also accepts the single-object rpc shape", async () => {
+  const rpc = async () => ({
+    data: { claim_state: "processing", algorithm_version: birthTimeScoringAlgorithmVersion },
+    error: null,
+  });
+  const store = createSupabaseScoringJobStore({ rpc } as unknown as DataClient, async () => null);
+  const claim = await store.claimScoringJob(identity);
+  assert.deepEqual(claim, {
+    kind: "processing",
+    algorithmVersion: birthTimeScoringAlgorithmVersion,
+  });
+});
+
+test("claim_birth_time_scoring_job returns an array and claimScoringJob accepts it", { skip: skipWithoutDocker }, async () => {
+  const fixture = startPostgresFixture();
+  const schemaUrl = fixture.connectionUrl("schema_owner", "schema-owner-test-password");
+  try {
+    const migration = spawnSync(process.execPath, [runnerPath], {
+      encoding: "utf8",
+      env: { ...process.env, SCHEMA_DATABASE_URL: schemaUrl },
+    });
+    assert.equal(
+      migration.status,
+      0,
+      JSON.stringify({
+        status: migration.status,
+        stderr: migration.stderr,
+        stdoutTail: String(migration.stdout).slice(-1500),
+      }),
+    );
+
+    fixture.psqlAs(
+      "identity_runtime",
+      "identity-runtime-test-password",
+      `insert into identity.users (id, name, email, email_verified, email_verified_at)
+       values (${sqlLiteral(ids.user)}, 'Claim Shape', 'claim-shape@example.com', true, now());`,
+    );
+    fixture.psql(`
+      insert into public.birth_time_rectification_cases (
+        id, user_id, status, reported_date, source
+      ) values (
+        ${sqlLiteral(ids.caseId)}, ${sqlLiteral(ids.user)}, 'rectifying', '1990-01-01', 'family_exact'
+      );
+      insert into public.birth_time_rectification_scoring_jobs (
+        id, case_id, user_id, evidence_fingerprint, algorithm_version, status, expires_at
+      ) values (
+        ${sqlLiteral(ids.job)}, ${sqlLiteral(ids.caseId)}, ${sqlLiteral(ids.user)},
+        ${sqlLiteral(fingerprint)}, ${sqlLiteral(birthTimeScoringAlgorithmVersion)},
+        'pending', '2026-10-15T01:00:00Z'
+      ), (
+        ${sqlLiteral(ids.shapeJob)}, ${sqlLiteral(ids.caseId)}, ${sqlLiteral(ids.user)},
+        ${sqlLiteral(`${fingerprint}-shape`)}, ${sqlLiteral(birthTimeScoringAlgorithmVersion)},
+        'pending', '2026-10-15T01:00:00Z'
+      );
+      update public.birth_time_rectification_cases
+      set journey_protocol = 'legacy-guided-v1',
+          turn_state = ${sqlLiteral(JSON.stringify({
+            nextAction: { kind: "score_pending", jobId: ids.shapeJob },
+          }))}::jsonb
+      where id = ${sqlLiteral(ids.caseId)};
+    `);
+
+    const client = createLocalPostgresDataClient(
+      fixture.connectionUrl("service_runtime", "service-runtime-test-password"),
+      null,
+      "service_role",
+    );
+    const direct = await client.rpc("claim_birth_time_scoring_job", {
+      p_user_id: ids.user,
+      p_case_id: ids.caseId,
+      p_job_id: ids.shapeJob,
+      p_evidence_fingerprint: `${fingerprint}-shape`,
+      p_algorithm_version: birthTimeScoringAlgorithmVersion,
+      p_now: identity.now,
+    });
+    assert.equal(direct.error, null, direct.error?.message);
+    assert.equal(Array.isArray(direct.data), true);
+    assert.equal(direct.data[0]?.claim_state, "claimed");
+
+    fixture.psql(`
+      update public.birth_time_rectification_cases
+      set turn_state = ${sqlLiteral(JSON.stringify({
+        nextAction: { kind: "score_pending", jobId: ids.job },
+      }))}::jsonb
+      where id = ${sqlLiteral(ids.caseId)};
+    `);
+    const store = createSupabaseScoringJobStore(client, async () => null);
+    const claim = await store.claimScoringJob(identity);
+    assert.deepEqual(claim, {
+      kind: "claimed",
+      algorithmVersion: birthTimeScoringAlgorithmVersion,
+    });
+  } finally {
+    await closeLocalPostgresDataPools();
+    fixture.stop();
+  }
+});