diff --git a/kbdb/src/actions/entry-crud.ts b/kbdb/src/actions/entry-crud.ts
index 192826e..45d26e2 100644
--- a/kbdb/src/actions/entry-crud.ts
+++ b/kbdb/src/actions/entry-crud.ts
@@ -21,6 +21,20 @@ export interface CreateEntryInput {
   id?: string;
 }
 
+// owner_id 寫入必填（D27/D28：機制強制，設計成 AI 錯不了）。
+// 缺 owner_id → 資料無主，會被 mira 等 caller 的 owner 過濾濾掉（實測 gloss owner=None 查不到）。
+// 這是通用驗證器，POST /entries（單筆）與 POST /entries/bulk（逐筆）共用同一把尺。
+// 註（機制邊界）：強制點在「HTTP 寫入路由」，不在 createEntry() 本身——因為 createEntry 被
+// record-crud 的 slot value entry（owner 由 record 帶）與 recipe-stat（全域統計、天生無主）內部呼叫。
+// 所有「外部」寫入（graph 插件 / mira / sync 腳本）都經 POST /entries|/entries/bulk，故路由層擋 = 擋死外部漏欄。
+export function validateEntryInput(input: unknown): string | null {
+  if (!input || typeof input !== 'object') return 'entry must be an object';
+  const e = input as Partial<CreateEntryInput>;
+  if (!e.entry_type) return 'entry_type required';
+  if (!e.owner_id) return 'owner_id required: 每筆寫入必須指定租戶，避免跨租戶資料無主';
+  return null;
+}
+
 export async function createEntry(db: D1Database, input: CreateEntryInput): Promise<Entry> {
   const id = input.id ?? uid('e');
   await db
@@ -123,6 +137,147 @@ export async function deleteEntry(db: D1Database, id: string): Promise<void> {
   await db.prepare('DELETE FROM entries WHERE id = ?').bind(id).run();
 }
 
+// ── Bulk write（缺口1 keystone：一次收整個 envelope，少 subrequest 寫法）────────────────
+//
+// 為什麼：base 舊寫入是「每筆一個 await db.prepare().run()」＝每筆一個 subrequest，串行。
+// 大筆記（journals 11 三元組+10 node）撞 CF「Too many subrequests by single Worker invocation」→ 500。
+// 解：用 D1 `db.batch([...stmts])`（一次 call 跑多語句）→ N 筆 ≈ 常數個 subrequest。
+//   本函式對任意 N 筆 entries 固定約 3 個 subrequest：① 一次 page_name 冪等查詢 ② 一次 batch 寫入
+//   ③ 一次 hydrate（IN(...) 撈回寫入列）。不隨 N 線性增長 → free/paid tier 都安全。
+// 冪等：沿用既有 page_name idempotency（同 sync-registry-to-kbdb.py 的 GET→PATCH/POST 模式）——
+//   payload 帶 page_name 且庫內已有 → UPDATE（不重複建）；否則 INSERT。單次查詢批量解析。
+// 部分失敗不整批炸：逐筆驗證（缺 owner_id/entry_type）先剔除記為 failed，其餘照寫；
+//   batch 若整體拋錯（如 DB 約束）→ 退化成逐句執行隔離出真正壞的那筆（只在錯誤路徑付 N 個 subrequest）。
+
+export interface BulkEntryItemResult {
+  index: number;
+  status: 'created' | 'updated' | 'failed';
+  id?: string;
+  page_name?: string | null;
+  error?: string;
+}
+
+export interface BulkEntriesResult {
+  created: number;
+  updated: number;
+  failed: number;
+  results: BulkEntryItemResult[]; // 逐筆結果（與輸入同順序）
+  entries: Entry[];               // 成功寫入（created+updated）的完整列，供 caller / embed 用
+}
+
+interface EntryOp {
+  index: number;
+  id: string;
+  kind: 'created' | 'updated';
+  stmt: D1PreparedStatement;
+}
+
+export async function bulkCreateEntries(db: D1Database, inputs: CreateEntryInput[]): Promise<BulkEntriesResult> {
+  const results: BulkEntryItemResult[] = new Array(inputs.length);
+
+  // 1. 逐筆驗證（owner_id/entry_type 必填）——壞的先剔除，不阻塞好的。
+  const valid: { index: number; input: CreateEntryInput; id: string }[] = [];
+  for (let i = 0; i < inputs.length; i++) {
+    const err = validateEntryInput(inputs[i]);
+    if (err) {
+      results[i] = { index: i, status: 'failed', error: err, page_name: (inputs[i] as CreateEntryInput | undefined)?.page_name ?? null };
+      continue;
+    }
+    valid.push({ index: i, input: inputs[i], id: inputs[i].id ?? uid('e') });
+  }
+
+  // 2. 冪等：單次查詢庫內已存在的 page_name → id（取代逐筆 GET，省 subrequest）。
+  const pageNames = [...new Set(valid.map((v) => v.input.page_name).filter((p): p is string => !!p))];
+  const existingByPage = new Map<string, string>();
+  if (pageNames.length > 0) {
+    const ph = pageNames.map(() => '?').join(',');
+    const res = await db
+      .prepare(`SELECT id, page_name FROM entries WHERE page_name IN (${ph})`)
+      .bind(...pageNames)
+      .all<{ id: string; page_name: string }>();
+    for (const r of res.results ?? []) existingByPage.set(r.page_name, r.id);
+  }
+
+  // 3. 組 INSERT / UPDATE 語句。
+  const ops: EntryOp[] = [];
+  for (const v of valid) {
+    const pn = v.input.page_name ?? null;
+    const existingId = pn ? existingByPage.get(pn) : undefined;
+    if (existingId) {
+      // 同 page_name 重入 → 就地更新可變欄位（entry_type/owner_id/page_name 不動）。不重複建列。
+      const stmt = db
+        .prepare(
+          `UPDATE entries SET content = ?, parent_id = ?, refs_json = ?, tags_json = ?, task_status = ?, confidence = ?, metadata_json = ?, updated_at = unixepoch() WHERE id = ?`,
+        )
+        .bind(
+          v.input.content ?? null,
+          v.input.parent_id ?? null,
+          v.input.refs_json ?? '[]',
+          v.input.tags_json ?? '[]',
+          v.input.task_status ?? null,
+          v.input.confidence ?? null,
+          v.input.metadata_json ?? null,
+          existingId,
+        );
+      ops.push({ index: v.index, id: existingId, kind: 'updated', stmt });
+    } else {
+      const stmt = db
+        .prepare(
+          `INSERT INTO entries (id, content, entry_type, owner_id, parent_id, page_name, refs_json, tags_json, task_status, confidence, metadata_json)
+           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
+        )
+        .bind(
+          v.id,
+          v.input.content ?? null,
+          v.input.entry_type,
+          v.input.owner_id ?? null,
+          v.input.parent_id ?? null,
+          pn,
+          v.input.refs_json ?? '[]',
+          v.input.tags_json ?? '[]',
+          v.input.task_status ?? null,
+          v.input.confidence ?? null,
+          v.input.metadata_json ?? null,
+        );
+      ops.push({ index: v.index, id: v.id, kind: 'created', stmt });
+    }
+  }
+
+  // 4. 一次 batch 寫入；整體失敗才退化逐句隔離（避免一筆壞牽連整批）。
+  if (ops.length > 0) {
+    try {
+      await db.batch(ops.map((o) => o.stmt));
+      for (const o of ops) results[o.index] = { index: o.index, status: o.kind, id: o.id };
+    } catch {
+      for (const o of ops) {
+        try {
+          await o.stmt.run();
+          results[o.index] = { index: o.index, status: o.kind, id: o.id };
+        } catch (e) {
+          results[o.index] = { index: o.index, status: 'failed', id: o.id, error: e instanceof Error ? e.message : String(e) };
+        }
+      }
+    }
+  }
+
+  // 5. hydrate 成功寫入的列（單次 IN(...) 查詢，不逐筆 getEntry）。
+  const okIds = [...new Set(ops.filter((o) => results[o.index]?.status !== 'failed').map((o) => o.id))];
+  let entries: Entry[] = [];
+  if (okIds.length > 0) {
+    const ph = okIds.map(() => '?').join(',');
+    const res = await db.prepare(`SELECT * FROM entries WHERE id IN (${ph})`).bind(...okIds).all<Entry>();
+    entries = res.results ?? [];
+  }
+
+  let created = 0, updated = 0, failed = 0;
+  for (const r of results) {
+    if (r.status === 'created') created++;
+    else if (r.status === 'updated') updated++;
+    else failed++;
+  }
+  return { created, updated, failed, results, entries };
+}
+
 // D1 LIKE keyword search (base; semantic search is the optional embed module).
 // entry_type: optional base filter (generic — caller passes any type, base stays type-agnostic).
 export async function searchEntries(
diff --git a/kbdb/src/actions/record-crud.ts b/kbdb/src/actions/record-crud.ts
index bbddcd2..bcdfc48 100644
--- a/kbdb/src/actions/record-crud.ts
+++ b/kbdb/src/actions/record-crud.ts
@@ -134,6 +134,144 @@ export async function updateRecord(
   return getRecord(db, recordId);
 }
 
+// ── Bulk records（缺口1：三元組批量寫入，avoid subrequest 撞牆）─────────────────────────
+//
+// 為什麼：一筆 record = 1 次 template 查詢 + N 個 slot（各一 INSERT entries + INSERT entry_values）。
+//   舊 createRecord 逐筆逐句串行 → 大批三元組（journals 11 筆）疊加 node/gloss 就撞 subrequest 500。
+// 解：整個 envelope 的所有 record 的所有 INSERT 攤平進「單一 db.batch()」→ 常數個 subrequest。
+//   template 也一次查回（WHERE id IN (...) OR name IN (...)），不逐筆 getTemplate。
+// 租戶必填（D27/D28）：每筆 record 缺 owner_id → 記 failed（value entries 的 owner 由 record 帶下去）。
+// 部分失敗不整批炸：驗證失敗 / template 不存在的先剔除；batch 整體拋錯 → 退化「逐 record 子 batch」隔離。
+
+export interface BulkRecordItemResult {
+  index: number;
+  status: 'created' | 'failed';
+  record_id?: string;
+  template_id?: string;
+  error?: string;
+}
+
+export interface BulkRecordsResult {
+  created: number;
+  failed: number;
+  results: BulkRecordItemResult[];
+  records: RecordResult[];
+}
+
+export async function bulkCreateRecords(db: D1Database, inputs: CreateRecordInput[]): Promise<BulkRecordsResult> {
+  const results: BulkRecordItemResult[] = new Array(inputs.length);
+
+  // 1. 驗證（template + values + owner_id 必填）+ 收集要查的 template key。
+  const need: { index: number; input: CreateRecordInput }[] = [];
+  const templKeys = new Set<string>();
+  for (let i = 0; i < inputs.length; i++) {
+    const inp = inputs[i];
+    if (!inp || !inp.template || !inp.values || typeof inp.values !== 'object') {
+      results[i] = { index: i, status: 'failed', error: 'template and values required' };
+      continue;
+    }
+    if (!inp.owner_id) {
+      results[i] = { index: i, status: 'failed', error: 'owner_id required: 每筆寫入必須指定租戶，避免跨租戶資料無主' };
+      continue;
+    }
+    need.push({ index: i, input: inp });
+    templKeys.add(inp.template);
+  }
+
+  // 2. 一次查回所有用到的 template（id 或 name 皆可）。
+  const templMap = new Map<string, Template>();
+  if (templKeys.size > 0) {
+    const keys = [...templKeys];
+    const ph = keys.map(() => '?').join(',');
+    const res = await db
+      .prepare(`SELECT * FROM templates WHERE id IN (${ph}) OR name IN (${ph})`)
+      .bind(...keys, ...keys)
+      .all<Template>();
+    for (const t of res.results ?? []) {
+      templMap.set(t.id, t);
+      templMap.set(t.name, t);
+    }
+  }
+
+  // 3. 每筆 record 組其 INSERT 語句（entries + entry_values），依 index 分組（供隔離退化用）。
+  const opsByIndex = new Map<number, D1PreparedStatement[]>();
+  const built = new Map<number, RecordResult>();
+  for (const { index, input } of need) {
+    const tpl = templMap.get(input.template);
+    if (!tpl) {
+      results[index] = { index, status: 'failed', error: `template not found: ${input.template}` };
+      continue;
+    }
+    let slots: string[];
+    try {
+      slots = JSON.parse(tpl.slots_json);
+    } catch {
+      results[index] = { index, status: 'failed', error: 'template slots_json invalid' };
+      continue;
+    }
+    const recordId = input.record_id ?? uid('rec');
+    const stmts: D1PreparedStatement[] = [];
+    const appliedValues: Record<string, string> = {};
+    for (const slot of slots) {
+      if (!(slot in input.values)) continue;
+      const entryId = uid('e');
+      stmts.push(
+        db
+          .prepare(`INSERT INTO entries (id, content, entry_type, owner_id) VALUES (?, ?, ?, ?)`)
+          .bind(entryId, input.values[slot], 'value', input.owner_id ?? null),
+      );
+      stmts.push(
+        db
+          .prepare(`INSERT INTO entry_values (id, record_id, template_id, slot_name, entry_id) VALUES (?, ?, ?, ?, ?)`)
+          .bind(uid('ev'), recordId, tpl.id, slot, entryId),
+      );
+      appliedValues[slot] = input.values[slot];
+    }
+    opsByIndex.set(index, stmts);
+    built.set(index, { record_id: recordId, template_id: tpl.id, values: appliedValues });
+  }
+
+  // 4. 攤平所有語句進單一 batch；整體失敗 → 逐 record 子 batch 隔離。
+  const flat: D1PreparedStatement[] = [];
+  for (const stmts of opsByIndex.values()) flat.push(...stmts);
+  if (flat.length > 0) {
+    try {
+      await db.batch(flat);
+      for (const index of opsByIndex.keys()) markCreated(results, built, index);
+    } catch {
+      for (const [index, stmts] of opsByIndex.entries()) {
+        try {
+          if (stmts.length > 0) await db.batch(stmts);
+          markCreated(results, built, index);
+        } catch (e) {
+          results[index] = { index, status: 'failed', error: e instanceof Error ? e.message : String(e) };
+        }
+      }
+    }
+  } else {
+    // 沒有任何語句（例：所有 record 的 values 都不含 template 的 slot）→ 仍記為 created（空 record）。
+    for (const index of opsByIndex.keys()) markCreated(results, built, index);
+  }
+
+  const records: RecordResult[] = [];
+  let created = 0, failed = 0;
+  for (const r of results) {
+    if (r.status === 'created') {
+      created++;
+      const rec = built.get(r.index);
+      if (rec) records.push(rec);
+    } else {
+      failed++;
+    }
+  }
+  return { created, failed, results, records };
+}
+
+function markCreated(results: BulkRecordItemResult[], built: Map<number, RecordResult>, index: number): void {
+  const rec = built.get(index);
+  results[index] = { index, status: 'created', record_id: rec?.record_id, template_id: rec?.template_id };
+}
+
 export async function getRecord(db: D1Database, recordId: string): Promise<RecordResult | null> {
   const res = await db
     .prepare(
diff --git a/kbdb/src/embed.ts b/kbdb/src/embed.ts
index c86f7dd..9d5086d 100644
--- a/kbdb/src/embed.ts
+++ b/kbdb/src/embed.ts
@@ -57,6 +57,37 @@ export async function embedOnWrite(env: Bindings, entry: Entry): Promise<boolean
   return true;
 }
 
+/**
+ * 批次 embed-on-write（bulk 寫入用）。對一組已寫入的 entry，一次批處理避免逐筆 AI.run/upsert 撞 subrequest。
+ *   - 模組未開 → no-op。
+ *   - 只 embed isEmbeddable（metadata.embed===true）且 content 非空的 entry（精耕，非地毯式）。
+ *   - 效率：單次 AI.run（陣列輸入）+ 單次 VECTORIZE.upsert（陣列）+ 單次 UPDATE...IN(...)——
+ *     與 backfillEmbeddings 同一「一批 ≈ 常數 subrequest」精神，不隨 N 線性增長。
+ * 回傳實際嵌入筆數。由 caller 用 waitUntil 包成 fire-and-forget（失敗不致命）。
+ */
+export async function embedManyOnWrite(env: Bindings, entries: Entry[]): Promise<number> {
+  if (!embedEnabled(env)) return 0;
+  const targets = entries.filter((e) => isEmbeddable(e) && (e.content ?? '').trim().length > 0);
+  if (targets.length === 0) return 0;
+  const texts = targets.map((e) => (e.content ?? '').trim());
+  const out = (await env.AI!.run(EMBED_MODEL, { text: texts })) as { data: number[][] };
+  const data = out?.data ?? [];
+  const vectors = targets
+    .map((e, i) => ({ e, vec: data[i] }))
+    .filter((x): x is { e: Entry; vec: number[] } => Array.isArray(x.vec) && x.vec.length > 0)
+    .map((x) => ({
+      id: x.e.id,
+      values: x.vec,
+      metadata: { owner_id: x.e.owner_id ?? '', entry_type: x.e.entry_type, source: readSource(x.e) ?? '' },
+    }));
+  if (vectors.length === 0) return 0;
+  await env.VECTORIZE!.upsert(vectors);
+  const ids = vectors.map((v) => v.id);
+  const placeholders = ids.map(() => '?').join(',');
+  await env.DB.prepare(`UPDATE entries SET is_embedded = 1 WHERE id IN (${placeholders})`).bind(...ids).run();
+  return vectors.length;
+}
+
 /** entry 是否該被 embed：caller 在 metadata_json 標 embed:true（精耕，非地毯式）。 */
 function isEmbeddable(entry: Entry): boolean {
   const meta = parseMeta(entry.metadata_json);
diff --git a/kbdb/src/routes/entries.ts b/kbdb/src/routes/entries.ts
index db139cb..afe69eb 100644
--- a/kbdb/src/routes/entries.ts
+++ b/kbdb/src/routes/entries.ts
@@ -8,21 +8,44 @@ import {
   updateEntry,
   deleteEntry,
   searchEntries,
+  validateEntryInput,
+  bulkCreateEntries,
 } from '../actions/entry-crud';
-import { embedEnabled, embedOnWrite, semanticSearch } from '../embed';
+import { embedEnabled, embedOnWrite, embedManyOnWrite, semanticSearch } from '../embed';
 
 export const entryRoutes = new Hono<{ Bindings: Bindings }>();
 
 // POST /entries — create (entry_type=block/value/project/workflow/...)
+// owner_id 必填（D27/D28 機制強制）：缺 → 400，避免跨租戶資料無主（gloss owner=None 查不到之坑）。
 entryRoutes.post('/', async (c) => {
   const body = await c.req.json().catch(() => null);
-  if (!body || !body.entry_type) return c.json({ success: false, error: 'entry_type required' }, 400);
+  const err = validateEntryInput(body);
+  if (err) return c.json({ success: false, error: err }, 400);
   const entry = await createEntry(c.env.DB, body);
   // embed-on-write (#7 / #5 第4點)：模組開 + entry 標 embed:true 才做；fire-and-forget，不阻塞回應、失敗不致命。
   if (embedEnabled(c.env)) c.executionCtx.waitUntil(embedOnWrite(c.env, entry).catch(() => {}));
   return c.json({ success: true, entry });
 });
 
+// POST /entries/bulk — 批次寫入（缺口1 keystone）。收 { entries: [...] } 或裸陣列 [...]。
+//   - 用 D1 batch，N 筆 ≈ 常數 subrequest（解「Too many subrequests」500，見 journals 11三元組+10node）。
+//   - 冪等：帶 page_name 且已存在 → 就地 update；否則 insert（同 sync 腳本 GET→PATCH/POST 語意）。
+//   - 逐筆結果（created/updated/failed 計數 + 失敗明細），部分失敗不整批炸。
+//   - owner_id 逐筆必填（缺 → 該筆 failed，不阻塞其餘）。
+//   - embed-on-write：對成功寫入且 embed:true 的 entry 批次嵌（單次 AI.run+upsert，不在迴圈逐筆撞 subrequest）。
+entryRoutes.post('/bulk', async (c) => {
+  const body = await c.req.json().catch(() => null);
+  const items = Array.isArray(body) ? body : body?.entries;
+  if (!Array.isArray(items)) {
+    return c.json({ success: false, error: 'body must be an array of entries or { entries: [...] }' }, 400);
+  }
+  const result = await bulkCreateEntries(c.env.DB, items);
+  if (embedEnabled(c.env) && result.entries.length > 0) {
+    c.executionCtx.waitUntil(embedManyOnWrite(c.env, result.entries).catch(() => {}));
+  }
+  return c.json({ success: true, ...result });
+});
+
 // GET /entries — list with filters (entry_type, owner_id, parent_id, page_name, source, q/search)
 // e.g. list workflows under a project: ?parent_id=PROJECT&entry_type=workflow
 // e.g. get one by idempotency key: ?page_name=skill-rag_with_arcrun
diff --git a/kbdb/src/routes/records.ts b/kbdb/src/routes/records.ts
index 7a2d891..06b2822 100644
--- a/kbdb/src/routes/records.ts
+++ b/kbdb/src/routes/records.ts
@@ -1,16 +1,20 @@
 // Records route — structured records (entry_values composed by a template).
 import { Hono } from 'hono';
 import type { Bindings } from '../types';
-import { createRecord, getRecord, searchByTemplate, updateRecord } from '../actions/record-crud';
+import { bulkCreateRecords, createRecord, getRecord, searchByTemplate, updateRecord } from '../actions/record-crud';
 
 export const recordRoutes = new Hono<{ Bindings: Bindings }>();
 
-// POST /records — { template, values:{slot:content}, owner_id? }
+// POST /records — { template, values:{slot:content}, owner_id }
+// owner_id 必填（D27/D28 機制強制）：record 的底層 value entries 靠此隔離租戶，缺 → 無主 → 400。
 recordRoutes.post('/', async (c) => {
   const body = await c.req.json().catch(() => null);
   if (!body || !body.template || !body.values) {
     return c.json({ success: false, error: 'template and values required' }, 400);
   }
+  if (!body.owner_id) {
+    return c.json({ success: false, error: 'owner_id required: 每筆寫入必須指定租戶，避免跨租戶資料無主' }, 400);
+  }
   try {
     const rec = await createRecord(c.env.DB, body);
     return c.json({ success: true, record: rec });
@@ -19,6 +23,19 @@ recordRoutes.post('/', async (c) => {
   }
 });
 
+// POST /records/bulk — 批次寫入 record（缺口1：三元組批量）。收 { records: [...] } 或裸陣列 [...]。
+//   - 所有 record 的所有 slot INSERT 攤平進單一 D1 batch → 常數 subrequest（解三元組批量 500）。
+//   - owner_id 逐筆必填（缺 → 該筆 failed）；逐筆結果 + 部分失敗不整批炸。
+recordRoutes.post('/bulk', async (c) => {
+  const body = await c.req.json().catch(() => null);
+  const items = Array.isArray(body) ? body : body?.records;
+  if (!Array.isArray(items)) {
+    return c.json({ success: false, error: 'body must be an array of records or { records: [...] }' }, 400);
+  }
+  const result = await bulkCreateRecords(c.env.DB, items);
+  return c.json({ success: true, ...result });
+});
+
 // GET /records/by-template/:template — list records of a template
 recordRoutes.get('/by-template/:template', async (c) => {
   const records = await searchByTemplate(c.env.DB, c.req.param('template'), c.req.query('owner_id') || undefined);
diff --git a/kbdb/tests/bulk-write.test.ts b/kbdb/tests/bulk-write.test.ts
new file mode 100644
index 0000000..e8a18de
--- /dev/null
+++ b/kbdb/tests/bulk-write.test.ts
@@ -0,0 +1,260 @@
+import { describe, it, expect } from 'vitest';
+import { Hono } from 'hono';
+import { bulkCreateEntries, validateEntryInput } from '../src/actions/entry-crud';
+import { bulkCreateRecords } from '../src/actions/record-crud';
+import { entryRoutes } from '../src/routes/entries';
+import { recordRoutes } from '../src/routes/records';
+import type { Bindings } from '../src/types';
+
+// ── In-memory fake D1 ────────────────────────────────────────────────────────
+// Interprets only the statement shapes the bulk/CRUD paths issue. Backed by real
+// Maps so idempotency (page_name), batch writes, and IN(...) hydration behave for real.
+interface Row { [k: string]: unknown }
+
+function collapse(sql: string): string {
+  return sql.replace(/\s+/g, ' ').trim();
+}
+
+class FakeDB {
+  entries = new Map<string, Row>();
+  entryValues: Row[] = [];
+  templates = new Map<string, Row>(); // keyed by id; name lookup scans
+
+  seedTemplate(t: { id: string; name: string; slots: string[] }) {
+    this.templates.set(t.id, { id: t.id, name: t.name, slots_json: JSON.stringify(t.slots), description: null, created_by: 'system' });
+  }
+
+  prepare(sql: string) {
+    const db = this;
+    let bound: unknown[] = [];
+    const stmt = {
+      bind(...args: unknown[]) { bound = args; return stmt; },
+      async run() { db._exec(sql, bound); return { success: true, meta: {} }; },
+      async all<T>() { return { results: db._query(sql, bound) as T[], success: true, meta: {} }; },
+      async first<T>() { const r = db._query(sql, bound); return (r[0] ?? null) as T; },
+    };
+    return stmt;
+  }
+
+  async batch(stmts: { run: () => Promise<unknown> }[]) {
+    const out: unknown[] = [];
+    for (const s of stmts) out.push(await s.run());
+    return out;
+  }
+
+  _exec(rawSql: string, bound: unknown[]) {
+    const sql = collapse(rawSql);
+    let m = sql.match(/^INSERT INTO (\w+) \(([^)]*)\) VALUES/i);
+    if (m) {
+      const table = m[1];
+      const cols = m[2].split(',').map((s) => s.trim());
+      const row: Row = {};
+      cols.forEach((c, i) => { row[c] = bound[i]; });
+      if (table === 'entries') {
+        this.entries.set(row.id as string, {
+          content: null, entry_type: null, owner_id: null, parent_id: null, page_name: null,
+          refs_json: '[]', tags_json: '[]', task_status: null, content_hash: null, is_embedded: 0,
+          confidence: null, metadata_json: null, created_at: 1, updated_at: 1, ...row,
+        });
+      } else if (table === 'entry_values') {
+        this.entryValues.push(row);
+      }
+      return;
+    }
+    m = sql.match(/^UPDATE entries SET (.*) WHERE id = \?$/i);
+    if (m) {
+      const setClause = m[1];
+      const assigns = setClause.split(',').map((s) => s.trim());
+      const id = bound[bound.length - 1] as string;
+      const row = this.entries.get(id);
+      let bi = 0;
+      for (const a of assigns) {
+        const col = a.split('=')[0].trim();
+        if (/=\s*unixepoch\(\)/i.test(a)) {
+          if (row) row[col] = 2;
+        } else {
+          if (row) row[col] = bound[bi];
+          bi++;
+        }
+      }
+      return;
+    }
+    // ignore anything else in exec
+  }
+
+  _query(rawSql: string, bound: unknown[]): Row[] {
+    const sql = collapse(rawSql);
+    if (/FROM templates/i.test(sql)) {
+      const all = [...this.templates.values()];
+      if (/IN \(/i.test(sql)) {
+        const keys = new Set(bound.map(String));
+        return all.filter((t) => keys.has(String(t.id)) || keys.has(String(t.name)));
+      }
+      // getTemplate: WHERE id = ? OR name = ? LIMIT 1
+      const key = String(bound[0]);
+      return all.filter((t) => String(t.id) === key || String(t.name) === key).slice(0, 1);
+    }
+    if (/FROM entries/i.test(sql)) {
+      const all = [...this.entries.values()];
+      if (/SELECT id, page_name/i.test(sql)) {
+        const set = new Set(bound.map(String));
+        return all.filter((e) => e.page_name != null && set.has(String(e.page_name))).map((e) => ({ id: e.id, page_name: e.page_name }));
+      }
+      if (/WHERE id IN \(/i.test(sql)) {
+        const set = new Set(bound.map(String));
+        return all.filter((e) => set.has(String(e.id)));
+      }
+      if (/WHERE id = \?/i.test(sql)) {
+        return all.filter((e) => String(e.id) === String(bound[0]));
+      }
+    }
+    return [];
+  }
+}
+
+function makeEnv(db: FakeDB): Bindings {
+  return { DB: asDb(db), ENVIRONMENT: 'test' } as Bindings;
+}
+
+const asDb = (db: FakeDB): D1Database => db as unknown as D1Database;
+
+// ── validateEntryInput ───────────────────────────────────────────────────────
+describe('validateEntryInput (owner_id 機制強制)', () => {
+  it('rejects missing owner_id', () => {
+    expect(validateEntryInput({ entry_type: 'block' })).toMatch(/owner_id required/);
+  });
+  it('rejects missing entry_type', () => {
+    expect(validateEntryInput({ owner_id: 'leo' })).toBe('entry_type required');
+  });
+  it('rejects non-object', () => {
+    expect(validateEntryInput(null)).toMatch(/must be an object/);
+  });
+  it('accepts a complete entry', () => {
+    expect(validateEntryInput({ entry_type: 'block', owner_id: 'leo' })).toBeNull();
+  });
+});
+
+// ── bulkCreateEntries ────────────────────────────────────────────────────────
+describe('bulkCreateEntries', () => {
+  it('creates many entries in one shot; partial failure does not abort the batch', async () => {
+    const db = new FakeDB();
+    const r = await bulkCreateEntries(asDb(db), [
+      { entry_type: 'block', owner_id: 'leo', content: 'a' },
+      { entry_type: 'block', owner_id: 'leo', content: 'b' },
+      { entry_type: 'block', content: 'no-owner' } as never, // missing owner_id → failed
+    ]);
+    expect(r.created).toBe(2);
+    expect(r.failed).toBe(1);
+    expect(r.results[2].status).toBe('failed');
+    expect(r.results[2].error).toMatch(/owner_id required/);
+    expect(r.entries.length).toBe(2);
+    expect(db.entries.size).toBe(2); // the bad one was never written
+  });
+
+  it('is idempotent by page_name: same key re-entry updates, does not duplicate', async () => {
+    const db = new FakeDB();
+    const first = await bulkCreateEntries(asDb(db), [
+      { entry_type: 'agent-skill', owner_id: 'registry', page_name: 'skill-x', content: 'v1' },
+    ]);
+    expect(first.created).toBe(1);
+    expect(db.entries.size).toBe(1);
+
+    const second = await bulkCreateEntries(asDb(db), [
+      { entry_type: 'agent-skill', owner_id: 'registry', page_name: 'skill-x', content: 'v2' },
+    ]);
+    expect(second.updated).toBe(1);
+    expect(second.created).toBe(0);
+    expect(db.entries.size).toBe(1); // no duplicate row
+    const row = [...db.entries.values()][0];
+    expect(row.content).toBe('v2'); // content flipped to the new value
+  });
+
+  it('accepts an empty array (no-op)', async () => {
+    const db = new FakeDB();
+    const r = await bulkCreateEntries(asDb(db), []);
+    expect(r).toMatchObject({ created: 0, updated: 0, failed: 0 });
+  });
+});
+
+// ── bulkCreateRecords ────────────────────────────────────────────────────────
+describe('bulkCreateRecords', () => {
+  it('creates records via a template; owner_id missing → that record fails', async () => {
+    const db = new FakeDB();
+    db.seedTemplate({ id: 'tpl-1', name: 'triplet', slots: ['subject', 'predicate', 'object'] });
+    const r = await bulkCreateRecords(asDb(db), [
+      { template: 'triplet', owner_id: 'leo', values: { subject: 'cat', predicate: 'is', object: 'animal' } },
+      { template: 'triplet', owner_id: 'leo', values: { subject: 'dog', predicate: 'is', object: 'animal' } },
+      { template: 'triplet', values: { subject: 'x', predicate: 'y', object: 'z' } } as never, // no owner
+    ]);
+    expect(r.created).toBe(2);
+    expect(r.failed).toBe(1);
+    expect(r.records.length).toBe(2);
+    // each created record wrote 3 value entries + 3 entry_values
+    expect(db.entryValues.length).toBe(6);
+    expect(db.entries.size).toBe(6);
+    // value entries carry the record owner (tenant isolation)
+    for (const e of db.entries.values()) expect(e.owner_id).toBe('leo');
+  });
+
+  it('unknown template → failed, not thrown', async () => {
+    const db = new FakeDB();
+    const r = await bulkCreateRecords(asDb(db), [{ template: 'nope', owner_id: 'leo', values: { a: 'b' } }]);
+    expect(r.failed).toBe(1);
+    expect(r.results[0].error).toMatch(/template not found/);
+  });
+});
+
+// ── Route-level owner_id enforcement (D27/D28) ───────────────────────────────
+describe('POST /entries owner_id enforcement (route 層擋死)', () => {
+  const app = new Hono<{ Bindings: Bindings }>();
+  app.route('/entries', entryRoutes);
+  app.route('/records', recordRoutes);
+
+  it('POST /entries without owner_id → 400', async () => {
+    const db = new FakeDB();
+    const res = await app.request('/entries', {
+      method: 'POST', headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ entry_type: 'block', content: 'x' }),
+    }, makeEnv(db));
+    expect(res.status).toBe(400);
+    expect((await res.json() as { error: string }).error).toMatch(/owner_id required/);
+    expect(db.entries.size).toBe(0);
+  });
+
+  it('POST /entries with owner_id → 200 created', async () => {
+    const db = new FakeDB();
+    const res = await app.request('/entries', {
+      method: 'POST', headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ entry_type: 'block', owner_id: 'leo', content: 'x' }),
+    }, makeEnv(db));
+    expect(res.status).toBe(200);
+    expect((await res.json() as { success: boolean }).success).toBe(true);
+    expect(db.entries.size).toBe(1);
+  });
+
+  it('POST /entries/bulk mixed → 200 with per-item breakdown', async () => {
+    const db = new FakeDB();
+    const res = await app.request('/entries/bulk', {
+      method: 'POST', headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ entries: [
+        { entry_type: 'block', owner_id: 'leo', content: 'a' },
+        { entry_type: 'block', content: 'b' }, // no owner
+      ] }),
+    }, makeEnv(db));
+    expect(res.status).toBe(200);
+    const body = await res.json() as { created: number; failed: number };
+    expect(body.created).toBe(1);
+    expect(body.failed).toBe(1);
+  });
+
+  it('POST /records without owner_id → 400', async () => {
+    const db = new FakeDB();
+    db.seedTemplate({ id: 'tpl-1', name: 'triplet', slots: ['s'] });
+    const res = await app.request('/records', {
+      method: 'POST', headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ template: 'triplet', values: { s: 'x' } }),
+    }, makeEnv(db));
+    expect(res.status).toBe(400);
+    expect((await res.json() as { error: string }).error).toMatch(/owner_id required/);
+  });
+});
diff --git a/system-dev/docs/3-specs/arcrun/kbdb-base/tasks.md b/system-dev/docs/3-specs/arcrun/kbdb-base/tasks.md
index 10253e4..7aeb7de 100644
--- a/system-dev/docs/3-specs/arcrun/kbdb-base/tasks.md
+++ b/system-dev/docs/3-specs/arcrun/kbdb-base/tasks.md
@@ -204,6 +204,30 @@
   寫一筆帶 `metadata.embed:true` 的 entry → `?mode=semantic` 搜回；未開時 `?mode=semantic` 回 keyword+capability_hint。
   本次只到 **tsc exit 0（kbdb/cypher/cli/mcp 全綠）+ toml 注入 dry-run 驗證**，不假裝端到端綠（mindset §7）。
 
+## Phase 13：base bulk 寫入端點 + owner_id 寫入必填（Arcrun#8，機械化 bulk ingest / bulk deprecate 的 keystone）—— 本次做
+
+> 來源：總管交辦（Arcrun#7 附帶缺口）。總庫機械化 bulk ingest + 舊語料 bulk deprecate 共同卡在
+> base 寫入「每筆一個 subrequest 串行」→ 大筆記（journals `2026_07_01.md` 11 三元組+10 node）撞 CF
+> 「Too many subrequests by single Worker invocation」回 500。另 base 寫入沒強制 owner_id → 漏傳寫成
+> owner=None，被 mira owner 過濾濾掉（實測 graph 插件回填 16 筆 gloss owner=None 查不到）。
+> 判定：屬 base 既有寫入能力的**補完**（同三表、同 CRUD、只是批次化省 subrequest），非新架構、不新增表/binding
+> （rule 06「修改不重建」）；owner 強制對齊既有租戶隔離模型（proxy 選項①）+ D27/D28「設計成 AI 錯不了」。故 in-scope。
+
+- [x] 13.1 **base bulk 寫入端點（缺口1 keystone）**：`POST /entries/bulk`（entries route）+ `POST /records/bulk`
+  （records route）。收整個 envelope（`{entries:[...]}` / `{records:[...]}` 或裸陣列）。**少 subrequest 寫法**：
+  用 D1 `db.batch([...stmts])` 一次 call 跑多語句 → N 筆 ≈ 常數 subrequest（entries：1 次 page_name 冪等查詢 +
+  1 次 batch + 1 次 hydrate；records：1 次 template 查 + 1 次攤平 batch）。`bulkCreateEntries`/`bulkCreateRecords`
+  在 actions；冪等沿用既有 page_name（帶 page_name 且已存在→就地 update，否則 insert）；回傳逐筆結果
+  （created/updated/failed 計數 + 失敗明細）、部分失敗不整批炸（逐筆驗證剔壞的 + batch 拋錯退化逐句/逐 record 隔離）；
+  embed-on-write 批次化（`embedManyOnWrite`：單次 AI.run+upsert，不在迴圈逐筆撞 subrequest）。kbdb tsc exit 0 + vitest 綠。
+- [x] 13.2 **owner_id 寫入必填（機制強制，D27/D28）**：`validateEntryInput` 通用驗證器（POST /entries 單筆 +
+  POST /entries/bulk 逐筆共用），缺 owner_id → 400/該筆 failed（明確錯誤 `owner_id required: 每筆寫入必須指定租戶…`）；
+  POST /records + POST /records/bulk 同理必填。**機制邊界＝HTTP 寫入路由**（不在 createEntry() 本身——它被
+  record slot value entry〔owner 由 record 帶〕與 recipe-stat〔全域統計、天生無主〕內部呼叫；所有外部寫入都經路由 → 路由層擋 = 擋死外部漏欄）。
+  **breaking change，會打到的 caller 見回報**（總管協調）。kbdb tsc exit 0 + vitest（route 400 測試）綠。
+- [x] 13.3 **測試**：`tests/bulk-write.test.ts`——bulk 多筆一次成功 + 部分失敗（缺 owner 不炸整批）+ 冪等（同 page_name 重入 update 不重複）；
+  bulk records（template 組裝 + owner 隔離）；route 層 owner_id 缺→400。13 測試綠（+ 既有 embed-backfill 5 = 18 全綠）。
+
 ## 驗收
 
 - [ ] V1 純 D1（無 Vectorize/AI）能 CRUD entries/templates/records + LIKE search