diff --git a/.gitignore b/.gitignore
index c2d00e5..517740b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,4 @@ docs/BME六大功能全景解析.xlsx
 ST-BME_backup_6f78abcb-9aea-45b1-a8ad-fbbd8e4075f0-cx4dad.json
 plans/mvu-extra-analysis-guard.md
 tests/.tmp-*/
+plans/deep-optimization-design.md
diff --git a/README.md b/README.md
index e64be7c..998d890 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ ST-BME（Bionic Memory Ecology）是一个 **SillyTavern 第三方前端扩展**
 - [主要配置](#主要配置)
 - [记忆模型](#记忆模型)
 - [长聊天与历史安全](#长聊天与历史安全)
+- [v3 重生计划与数据格式硬切](#v3-重生计划与数据格式硬切)
 - [常用操作速查](#常用操作速查)
 - [数据存储与同步](#数据存储与同步)
 - [排障指南](#排障指南)
@@ -25,6 +26,27 @@ ST-BME（Bionic Memory Ecology）是一个 **SillyTavern 第三方前端扩展**
 
 ---
 
+## v3 重生计划与数据格式硬切
+
+ST-BME 正在推进一次“克制版重生”：身份解析、持久化确认、GraphHead 数据模型和持久化路由外壳会被重建为更干净的 v3 核心；Luker、OPFS、IndexedDB、Authority、向量等仍在使用的适配能力会平移到新接口。
+
+这次重生会采用 **v3 新命名空间 + 新数据格式硬切**：
+
+- v3 运行时不会把旧 IndexedDB / OPFS / Luker sidecar / metadata-full / 旧 commit marker 当作热路径数据源；
+- 不会保留永久的“旧格式读取层”或 dark-read/dual-write 兼容层；
+- 如需保留旧图谱，请在切换前通过面板“导出图谱”或服务器备份功能先导出/备份；
+- 后续最多提供一次性导入/重置工具，旧数据导入后工具可移除；
+- 如果不导入旧图谱，v3 会从聊天历史重新提取/重建，但这会消耗 LLM 调用，且不保证完全复现旧图谱；
+- v3 数据可能无法被旧版本读取，切换或回滚前请保留导出/备份。
+
+当前阶段的策略盘点 / 切换清单命令（不会扫描浏览器或服务器实际数据）：
+
+```bash
+npm run rebirth:inventory
+```
+
+---
+
 ## 核心能力
 
 - **自动记忆提取**
diff --git a/package.json b/package.json
index 1390fd7..29550d0 100644
--- a/package.json
+++ b/package.json
@@ -6,6 +6,7 @@
     "test:triviumdb-poc": "node tests/triviumdb-poc.mjs",
     "test:runtime-history": "node tests/runtime-history.mjs",
     "test:graph-persistence": "node tests/graph-persistence.mjs",
+    "test:rebirth-phase0": "node tests/rebirth-phase0.mjs",
     "test:hide-engine": "node tests/hide-engine.mjs",
     "test:maintenance-journal": "node tests/maintenance-journal.mjs",
     "test:indexeddb-persistence": "node tests/indexeddb-persistence.mjs",
@@ -29,7 +30,8 @@
     "test:authority:e2e:restore": "node tests/e2e/authority-checkpoint-restore.mjs",
     "test:authority:e2e:all": "npm run test:authority:e2e && npm run test:authority:e2e:diagnostics && npm run test:authority:e2e:restore",
     "test:all": "npm run test:stable",
-    "check": "node scripts/check-syntax.mjs"
+    "check": "node scripts/check-syntax.mjs",
+    "rebirth:inventory": "node scripts/rebirth-phase0-inventory.mjs"
   },
   "dependencies": {
     "triviumdb": "0.7.1"
diff --git a/runtime/rebirth-policy.mjs b/runtime/rebirth-policy.mjs
new file mode 100644
index 0000000..92dd6fe
--- /dev/null
+++ b/runtime/rebirth-policy.mjs
@@ -0,0 +1,128 @@
+// ST-BME restrained rebirth policy.
+//
+// Phase 0 deliberately keeps this module side-effect free. It records the
+// project-level cutover contract so later phases cannot quietly reintroduce a
+// permanent legacy data-format compatibility layer.
+
+export const REBIRTH_FORMAT_VERSION = 3;
+
+export const V3_STORAGE_NAMESPACES = Object.freeze({
+  root: "st-bme-v3",
+  graph: "graph-v3",
+  commitMarker: "commit-marker-v3",
+  vectorManifest: "vector-manifest-v3",
+  authorityGraph: "authority-graph-v3",
+  lukerSidecar: "luker-graph-v3",
+});
+
+export const LEGACY_DATA_RUNTIME_POLICY = Object.freeze({
+  permanentRuntimeLegacyRead: false,
+  darkReadDualWriteMigration: false,
+  allowedLegacyAccess: Object.freeze(["one-shot-importer", "explicit-export", "manual-reset"]),
+  fallbackWhenNoImporter: "rebuild-from-chat-history",
+});
+
+export const LIVE_ADAPTER_TARGETS = Object.freeze([
+  "indexeddb",
+  "opfs",
+  "authority-sql",
+  "luker-chat-state",
+  "vector-manifest",
+]);
+
+export const LEGACY_DATA_SOURCES = Object.freeze([
+  Object.freeze({
+    id: "indexeddb-legacy",
+    kind: "graph-store",
+    runtimeAction: "ignore",
+    phase0Action: "inventory-or-export",
+    notes: "Old IndexedDB snapshots/migration stores must not be auto-read by v3 runtime.",
+  }),
+  Object.freeze({
+    id: "opfs-legacy",
+    kind: "graph-store",
+    runtimeAction: "ignore",
+    phase0Action: "inventory-or-export",
+    notes: "Old OPFS v1/v2 graph layouts require explicit import or reset.",
+  }),
+  Object.freeze({
+    id: "authority-sql-legacy",
+    kind: "server-graph-store",
+    runtimeAction: "ignore",
+    phase0Action: "inventory-or-export",
+    notes: "Authority v3 must use a graphId/schema-version namespace and reject old rows by default.",
+  }),
+  Object.freeze({
+    id: "luker-sidecar-legacy",
+    kind: "host-chat-state",
+    runtimeAction: "ignore",
+    phase0Action: "inventory-or-export",
+    notes: "Legacy Luker manifest/journal/checkpoint keys remain inert unless an importer reads them.",
+  }),
+  Object.freeze({
+    id: "metadata-full-legacy",
+    kind: "chat-metadata",
+    runtimeAction: "ignore",
+    phase0Action: "inventory-or-export",
+    notes: "Old full graph blobs in chat metadata are not a v3 runtime source.",
+  }),
+  Object.freeze({
+    id: "commit-marker-legacy",
+    kind: "chat-metadata",
+    runtimeAction: "ignore",
+    phase0Action: "inventory-or-export",
+    notes: "Old commit markers are evidence only for a one-shot importer, not v3 acceptance state.",
+  }),
+  Object.freeze({
+    id: "vector-manifest-legacy",
+    kind: "vector-state",
+    runtimeAction: "ignore",
+    phase0Action: "reset-or-rebuild",
+    notes: "Vectors are rebuildable; legacy vector manifests must not contaminate v3 graphId/vectorSpaceId.",
+  }),
+]);
+
+export const PHASE0_BACKUP_CHECKLIST = Object.freeze([
+  Object.freeze({
+    id: "manual-graph-export",
+    label: "Export current graph JSON from the ST-BME panel before enabling v3.",
+    source: "ui-actions-controller:onExportGraphController",
+  }),
+  Object.freeze({
+    id: "server-backup",
+    label: "If Authority/server backup is used, create a server backup envelope first.",
+    source: "sync/bme-sync:backupToServer",
+  }),
+  Object.freeze({
+    id: "authority-reset-plan",
+    label: "Plan an explicit Authority v3 namespace/reset so old SQL/blob/vector rows cannot be selected.",
+    source: "runtime/rebirth-policy:V3_STORAGE_NAMESPACES.authorityGraph",
+  }),
+  Object.freeze({
+    id: "legacy-import-decision",
+    label: "Decide per legacy source: one-shot import, export-only backup, rebuild from chat history, or discard.",
+    source: "runtime/rebirth-policy:LEGACY_DATA_SOURCES",
+  }),
+]);
+
+export function getRebirthPhase0Inventory() {
+  return {
+    formatVersion: REBIRTH_FORMAT_VERSION,
+    namespaces: { ...V3_STORAGE_NAMESPACES },
+    policy: {
+      permanentRuntimeLegacyRead: LEGACY_DATA_RUNTIME_POLICY.permanentRuntimeLegacyRead,
+      darkReadDualWriteMigration: LEGACY_DATA_RUNTIME_POLICY.darkReadDualWriteMigration,
+      allowedLegacyAccess: [...LEGACY_DATA_RUNTIME_POLICY.allowedLegacyAccess],
+      fallbackWhenNoImporter: LEGACY_DATA_RUNTIME_POLICY.fallbackWhenNoImporter,
+    },
+    liveAdapterTargets: [...LIVE_ADAPTER_TARGETS],
+    legacyDataSources: LEGACY_DATA_SOURCES.map((source) => ({ ...source })),
+    backupChecklist: PHASE0_BACKUP_CHECKLIST.map((item) => ({ ...item })),
+  };
+}
+
+export function shouldV3RuntimeReadLegacySource(sourceId) {
+  const source = LEGACY_DATA_SOURCES.find((entry) => entry.id === sourceId);
+  if (!source) return false;
+  return source.runtimeAction === "read";
+}
diff --git a/scripts/rebirth-phase0-inventory.mjs b/scripts/rebirth-phase0-inventory.mjs
new file mode 100644
index 0000000..b7ea967
--- /dev/null
+++ b/scripts/rebirth-phase0-inventory.mjs
@@ -0,0 +1,38 @@
+#!/usr/bin/env node
+
+import { getRebirthPhase0Inventory } from "../runtime/rebirth-policy.mjs";
+
+const inventory = getRebirthPhase0Inventory();
+
+if (process.argv.includes("--json")) {
+  console.log(JSON.stringify(inventory, null, 2));
+  process.exit(0);
+}
+
+console.log("ST-BME v3 restrained rebirth — Phase 0 policy inventory / cutover checklist");
+console.log(`formatVersion: ${inventory.formatVersion}`);
+console.log("\nV3 namespaces:");
+for (const [key, value] of Object.entries(inventory.namespaces)) {
+  console.log(`  - ${key}: ${value}`);
+}
+
+console.log("\nLegacy runtime policy:");
+console.log(`  permanentRuntimeLegacyRead: ${inventory.policy.permanentRuntimeLegacyRead}`);
+console.log(`  darkReadDualWriteMigration: ${inventory.policy.darkReadDualWriteMigration}`);
+console.log(`  allowedLegacyAccess: ${inventory.policy.allowedLegacyAccess.join(", ")}`);
+console.log(`  fallbackWhenNoImporter: ${inventory.policy.fallbackWhenNoImporter}`);
+
+console.log("\nLive adapter targets to port (not rewrite):");
+for (const target of inventory.liveAdapterTargets) {
+  console.log(`  - ${target}`);
+}
+
+console.log("\nLegacy data sources:");
+for (const source of inventory.legacyDataSources) {
+  console.log(`  - ${source.id}: runtime=${source.runtimeAction}, phase0=${source.phase0Action}`);
+}
+
+console.log("\nBackup / cutover checklist:");
+for (const item of inventory.backupChecklist) {
+  console.log(`  - [${item.id}] ${item.label}`);
+}
diff --git a/tests/rebirth-phase0.mjs b/tests/rebirth-phase0.mjs
new file mode 100644
index 0000000..7df7f38
--- /dev/null
+++ b/tests/rebirth-phase0.mjs
@@ -0,0 +1,67 @@
+// ST-BME restrained rebirth — Phase 0 policy characterization.
+
+import assert from "node:assert/strict";
+import {
+  LEGACY_DATA_RUNTIME_POLICY,
+  LEGACY_DATA_SOURCES,
+  PHASE0_BACKUP_CHECKLIST,
+  REBIRTH_FORMAT_VERSION,
+  V3_STORAGE_NAMESPACES,
+  getRebirthPhase0Inventory,
+  shouldV3RuntimeReadLegacySource,
+} from "../runtime/rebirth-policy.mjs";
+
+assert.equal(REBIRTH_FORMAT_VERSION, 3);
+
+for (const [key, namespace] of Object.entries(V3_STORAGE_NAMESPACES)) {
+  assert.match(namespace, /v3/, `${key} namespace must be versioned as v3`);
+}
+assert.equal(new Set(Object.values(V3_STORAGE_NAMESPACES)).size, Object.keys(V3_STORAGE_NAMESPACES).length);
+
+console.log("  ✓ v3 namespaces are explicit and collision-resistant");
+
+assert.equal(LEGACY_DATA_RUNTIME_POLICY.permanentRuntimeLegacyRead, false);
+assert.equal(LEGACY_DATA_RUNTIME_POLICY.darkReadDualWriteMigration, false);
+assert.deepEqual(LEGACY_DATA_RUNTIME_POLICY.allowedLegacyAccess, [
+  "one-shot-importer",
+  "explicit-export",
+  "manual-reset",
+]);
+assert.equal(LEGACY_DATA_RUNTIME_POLICY.fallbackWhenNoImporter, "rebuild-from-chat-history");
+
+for (const source of LEGACY_DATA_SOURCES) {
+  assert.equal(source.runtimeAction, "ignore", `${source.id} must remain inert for v3 runtime`);
+  assert.equal(
+    shouldV3RuntimeReadLegacySource(source.id),
+    false,
+    `${source.id} must not be read by the v3 runtime`,
+  );
+  assert.notEqual(source.phase0Action, "runtime-read", `${source.id} must not plan a runtime read`);
+}
+
+for (const requiredSource of [
+  "metadata-full-legacy",
+  "commit-marker-legacy",
+  "vector-manifest-legacy",
+  "authority-sql-legacy",
+]) {
+  assert.ok(
+    LEGACY_DATA_SOURCES.some((source) => source.id === requiredSource),
+    `${requiredSource} must be represented in Phase 0 policy`,
+  );
+}
+
+console.log("  ✓ legacy sources are inert for the v3 runtime");
+
+const inventory = getRebirthPhase0Inventory();
+assert.equal(inventory.formatVersion, 3);
+assert.equal(inventory.policy.permanentRuntimeLegacyRead, false);
+assert.equal(inventory.policy.fallbackWhenNoImporter, "rebuild-from-chat-history");
+assert.equal(inventory.namespaces.authorityGraph, "authority-graph-v3");
+assert.equal(inventory.namespaces.lukerSidecar, "luker-graph-v3");
+assert.ok(inventory.legacyDataSources.length >= 6);
+assert.ok(PHASE0_BACKUP_CHECKLIST.some((item) => item.id === "manual-graph-export"));
+assert.ok(PHASE0_BACKUP_CHECKLIST.some((item) => item.id === "authority-reset-plan"));
+
+console.log("  ✓ Phase 0 inventory exposes backup and cutover gates");
+console.log("rebirth-phase0 tests passed");