diff --git a/cypher-executor/src/lib/portal-seeds.ts b/cypher-executor/src/lib/portal-seeds.ts
index 003c922..3e151e0 100644
--- a/cypher-executor/src/lib/portal-seeds.ts
+++ b/cypher-executor/src/lib/portal-seeds.ts
@@ -37,4 +37,21 @@ export const PORTAL_TEMPLATE_SEEDS: PortalTemplateSeed[] = [
     slots: ['name', 'display_name', 'description', 'status', 'graph_source'],
     created_by: 'system',
   },
+  {
+    // t130：rag_ingest_card.post_triplet 寫 POST /records {template:'triplet'}。
+    // 新實例若無此 template 回 400「template not found: triplet」→ 三元組全滅。
+    // slots 來源：kbdb_list_templates 核實（2026-07-19，library-map.test.ts PROD_TRIPLET_SLOTS）
+    // + library（library-map.ts M1 預案：recompute 歸庫用，ensurePortalTemplates 若缺則 PATCH 補入）。
+    name: 'triplet',
+    description: 'KBDB 知識圖譜三元組（kbdb-graph-plugin 寫入；portal 讀此 template 建鄰接圖）',
+    slots: [
+      'subject', 'predicate', 'object',
+      'source_block_id', 'confidence', 'clusters_json',
+      'bridge_score', 'subject_entity_type', 'object_entity_type',
+      'status', 'superseded_by',
+      'source_uri', 'content_hash', 'source_anchor', 'predicate_embed',
+      'library',
+    ],
+    created_by: 'system',
+  },
 ];
diff --git a/cypher-executor/tests/portal-admin.test.ts b/cypher-executor/tests/portal-admin.test.ts
index 52771f7..4476146 100644
--- a/cypher-executor/tests/portal-admin.test.ts
+++ b/cypher-executor/tests/portal-admin.test.ts
@@ -66,7 +66,7 @@ function mockListByTemplate(template: string, records: { record_id: string; valu
 }
 
 function mockTemplatesExist() {
-  for (const name of ['portal_user', 'portal_library']) {
+  for (const name of ['portal_user', 'portal_library', 'triplet']) {
     fetchMock
       .get(KBDB)
       .intercept({ path: `/templates/${name}`, method: 'GET' })
diff --git a/cypher-executor/tests/portal-auth.test.ts b/cypher-executor/tests/portal-auth.test.ts
index d4f26cb..ace19e1 100644
--- a/cypher-executor/tests/portal-auth.test.ts
+++ b/cypher-executor/tests/portal-auth.test.ts
@@ -19,6 +19,7 @@
 import { SELF, env, fetchMock } from 'cloudflare:test';
 import { beforeAll, beforeEach, afterEach, describe, it, expect } from 'vitest';
 import { hashPassword, verifyPassword, PBKDF2_ITERATIONS } from '../src/lib/portal-auth';
+import { PORTAL_TEMPLATE_SEEDS } from '../src/lib/portal-seeds';
 
 const KBDB = 'https://kbdb.test';
 const NS = 'leo::portal'; // wrangler.test.toml CONSOLE_TENANT=leo → 子 namespace
@@ -73,7 +74,7 @@ function mockListByTemplate(template: string, records: { record_id: string; valu
 }
 
 function mockTemplatesExist() {
-  for (const name of ['portal_user', 'portal_library']) {
+  for (const name of ['portal_user', 'portal_library', 'triplet']) {
     fetchMock
       .get(KBDB)
       .intercept({ path: `/templates/${name}`, method: 'GET' })
@@ -414,3 +415,52 @@ describe('admin 端點 role 閘', () => {
     expect(res.status).toBe(404);
   });
 });
+
+// ═══════════════ t130 — triplet template seed ═══════════════
+
+describe('t130 — triplet template seed（PORTAL_TEMPLATE_SEEDS 補 triplet，ensurePortalTemplates 冪等）', () => {
+  it('PORTAL_TEMPLATE_SEEDS 含 triplet 且必要 slots 齊備（pure data）', () => {
+    const seed = PORTAL_TEMPLATE_SEEDS.find((s) => s.name === 'triplet');
+    expect(seed).toBeDefined();
+    for (const slot of ['subject', 'predicate', 'object', 'source_uri', 'status', 'library']) {
+      expect(seed!.slots).toContain(slot);
+    }
+  });
+
+  it('POST /init/seed — triplet 已存 → existing（冪等，不重建）', async () => {
+    for (const name of ['portal_user', 'portal_library', 'triplet']) {
+      fetchMock
+        .get(KBDB)
+        .intercept({ path: `/templates/${name}`, method: 'GET' })
+        .reply(200, { success: true, template: { id: `tpl-${name}`, name } });
+    }
+    const res = await SELF.fetch('http://localhost/init/seed', { method: 'POST' });
+    expect(res.status).toBe(200);
+    const data = (await res.json()) as { portal_templates: { created: string[]; existing: string[] } };
+    expect(data.portal_templates.existing).toContain('triplet');
+    expect(data.portal_templates.created).not.toContain('triplet');
+  });
+
+  it('POST /init/seed — triplet 缺 → 自動補建（新實例首次 seed）', async () => {
+    for (const name of ['portal_user', 'portal_library']) {
+      fetchMock
+        .get(KBDB)
+        .intercept({ path: `/templates/${name}`, method: 'GET' })
+        .reply(200, { success: true, template: { id: `tpl-${name}`, name } });
+    }
+    fetchMock
+      .get(KBDB)
+      .intercept({ path: '/templates/triplet', method: 'GET' })
+      .reply(404, { success: false, error: 'template not found: triplet' });
+    fetchMock
+      .get(KBDB)
+      .intercept({ path: '/templates', method: 'POST' })
+      .reply(200, { success: true, template: { id: 'tpl-triplet-new', name: 'triplet' } });
+
+    const res = await SELF.fetch('http://localhost/init/seed', { method: 'POST' });
+    expect(res.status).toBe(200);
+    const data = (await res.json()) as { portal_templates: { created: string[]; existing: string[] } };
+    expect(data.portal_templates.created).toContain('triplet');
+    expect(data.portal_templates.existing).not.toContain('triplet');
+  });
+});
diff --git a/system-dev/docs/3-specs/portal-auth/tasks.md b/system-dev/docs/3-specs/portal-auth/tasks.md
index 2407c69..dd043b2 100644
--- a/system-dev/docs/3-specs/portal-auth/tasks.md
+++ b/system-dev/docs/3-specs/portal-auth/tasks.md
@@ -254,6 +254,21 @@
     - rag_chat：question ✅；namespace/kbdb_base 未核實（rag_chat workflow yaml 在 arcrun-rag，非本 repo）
     - takedown：不在 portal-data.ts，在 arcrun-rag 端（dashboard/安裝器），超出本 repo 範圍
 
+- [x] **t130 新實例缺 triplet template → 總圖永遠空（2026-07-29，任務層小改）**：
+  真因：`PORTAL_TEMPLATE_SEEDS` 只有 `portal_user`＋`portal_library`；`rag_ingest_card.post_triplet`
+  打 `POST /records {template:'triplet'}` → 新實例回 400「template not found: triplet」→ 三元組全滅。
+  修：`portal-seeds.ts` 補 `triplet` seed（slots 來源：2026-07-19 kbdb_list_templates 核實 15 槽 + library）。
+  呼叫路徑驗證（`ensurePortalTemplates` 全四掛點）：
+    ① `POST /init/seed`（acr init 觸發）← 主線，新裝必經
+    ② `POST /portal/admin/bootstrap`（首次 admin 設定）
+    ③ `POST /portal/daemon/libraries`（daemon 登記資料夾→庫）
+    ④ `POST /portal/admin/libraries`（admin 手動新增庫）
+  既有壞實例補救：任一掛點重跑即補建（冪等），e.g. 重跑 acr init 或 bootstrap。
+  執行範圍：`cypher-executor/src/lib/portal-seeds.ts`（新增 triplet seed）；
+    `cypher-executor/tests/portal-auth.test.ts`（mockTemplatesExist 補 triplet + t130 3 條新測試）；
+    `cypher-executor/tests/portal-admin.test.ts`（mockTemplatesExist 補 triplet）。
+  測試：純資料驗證（seed 含 triplet + 必要 slots）＋冪等驗（已存→existing）＋自動補建（404→POST→created）。
+
 - [x] **t129 AI 問答出處重複一整頁——後端按 page_name 去重（2026-07-29，任務層小改）**：
   診斷：一張卡拆成 3-5 block，每 block 各回一筆 source（同 page_name）→ 前端列一整頁重複。
   選後端修（/portal/data/chat）理由：出處去重是資料清潔，跟前端渲染無關；改後端不需動 HTML。