diff --git a/cocoscreator_projects/framework-tests/legacy-layer-migration/prefab-emitter.test.mjs b/cocoscreator_projects/framework-tests/legacy-layer-migration/prefab-emitter.test.mjs
new file mode 100644
index 0000000..0146810
--- /dev/null
+++ b/cocoscreator_projects/framework-tests/legacy-layer-migration/prefab-emitter.test.mjs
@@ -0,0 +1,51 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { emitPrefabJson } from '../../scripts/legacy-layer-to-cocos-prefab.mjs';
+
+test('emitPrefabJson 输出是 JSON 数组', () => {
+  const layer = { layerId: '2', layerName: 'Login_Layer', spirits: [] };
+  const json = emitPrefabJson(layer);
+  assert.ok(Array.isArray(json), '输出必须是数组');
+  assert.ok(json.length >= 1, '至少含 cc.Prefab 头');
+  assert.equal(json[0].__type__, 'cc.Prefab');
+  assert.equal(json[0]._name, 'Login_Layer');
+});
+
+test('emitPrefabJson 含 CompPrefabInfo 引用块', () => {
+  const layer = { layerId: '2', layerName: 'Login_Layer', spirits: [] };
+  const json = emitPrefabJson(layer);
+  const compInfo = json.filter(o => o.__type__ === 'cc.CompPrefabInfo');
+  assert.ok(compInfo.length > 0, '每个组件应有 CompPrefabInfo 引用块');
+});
+
+test('emitPrefabJson 含 PrefabInfo 块', () => {
+  const layer = { layerId: '2', layerName: 'Login_Layer', spirits: [] };
+  const json = emitPrefabJson(layer);
+  const prefabInfo = json.find(o => o.__type__ === 'cc.PrefabInfo');
+  assert.ok(prefabInfo, '必须有 PrefabInfo 块');
+  assert.equal(prefabInfo.root.__id__, 1);  // 根节点 id=1
+  assert.equal(prefabInfo.asset.__id__, 0);
+});
+
+test('emitPrefabJson 渠道logo _lpos 误差 < 0.001', () => {
+  // 注: brief 原版用 spirit name='Spirit405' 但断言搜 /渠道/; 实际 fixture 里 id=405 的 spirit
+  // 坐标 (734, 143, 59, 148) 严格对应 Login_Layer '渠道logo' 节点; 这里 name 用 '渠道logo'
+  // 与断言一致, 否则 node 找不到。
+  const layer = {
+    layerId: '2', layerName: 'Login_Layer',
+    spirits: [
+      { id: '2', name: '微信登录背景', type: '0', imgResID: '20',
+        x: '0', y: '0', w: '1280', h: '720', group: '2', indexOfLayer: '1' },
+      { id: '405', name: '渠道logo', type: '0', imgResID: '5',
+        x: '734', y: '143', w: '59', h: '148', group: '2', indexOfLayer: '2' },
+      { id: '285', name: '版本显示', type: '1', imgResID: '',
+        x: '16', y: '9', w: '96', h: '31', group: '2', indexOfLayer: '3' },
+    ],
+  };
+  const json = emitPrefabJson(layer);
+  // Find 渠道logo node
+  const genLogo = json.find(o => o.__type__ === 'cc.Node' && o._name && o._name.includes('渠道'));
+  assert.ok(genLogo, '应有渠道logo node');
+  assert.ok(Math.abs(genLogo._lpos.x - 123.5) < 0.001, `x expected 123.5 got ${genLogo._lpos.x}`);
+  assert.ok(Math.abs(genLogo._lpos.y - 143) < 0.001, `y expected 143 got ${genLogo._lpos.y}`);
+});
\ No newline at end of file
diff --git a/cocoscreator_projects/scripts/legacy-layer-to-cocos-prefab.mjs b/cocoscreator_projects/scripts/legacy-layer-to-cocos-prefab.mjs
index 2a39acb..18f07a5 100644
--- a/cocoscreator_projects/scripts/legacy-layer-to-cocos-prefab.mjs
+++ b/cocoscreator_projects/scripts/legacy-layer-to-cocos-prefab.mjs
@@ -257,3 +257,447 @@ export function resolveSpriteFrameUuid(imgResId) {
   }
   return spriteFrame.uuid;
 }
+
+// ============================================================================
+// emitPrefabJson — Layer → Cocos prefab JSON 数组 (Task 8)
+//
+// Schema 严格按 fixtures/Login_Layer.prefab (已实测): cc.Prefab 头 + cc.Node 根 +
+// group-X 父节点 + 每个 Spirit (Node + UITransform + CompPrefabInfo + 主组件 +
+// CompPrefabInfo + Widget + CompPrefabInfo + PrefabInfo) + 末尾 group/root 的
+// UITransform/Widget/PrefabInfo 块.
+//
+// ID 分配: cc.Prefab 在 array[0] (无 __id__ 字段, 仅 data.__id__=1 引用根);
+// 从 array[1] 开始 __id__ = array-index. root=1, group-N=2..K, 然后 spirits
+// 按 group-then-IndexOfLayer 顺序, 每个 spirit 占 8 个 id (1 Node + 1 UIT +
+// 1 CompInfo + 1 主组件 + 1 CompInfo + 1 Widget + 1 CompInfo + 1 PrefabInfo).
+// group-N 的 UIT/Widget/PrefabInfo 排在所有 spirits 之后, root 的排在最后.
+//
+// 设计分辨率: 1600×720 (YouleNexus project.json), 与 Login_Layer.prefab 中
+// group/root UITransform._contentSize 一致.
+// ============================================================================
+
+const DESIGN_WIDTH = 1600;
+const DESIGN_HEIGHT = 720;
+
+function randomFileId() {
+  const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
+  let id = '';
+  for (let i = 0; i < 22; i++) {
+    id += chars[Math.floor(Math.random() * chars.length)];
+  }
+  return id;
+}
+
+function makeNode(name, parentRef) {
+  return {
+    __type__: 'cc.Node',
+    _name: name,
+    _objFlags: 0,
+    __editorExtras__: {},
+    _parent: parentRef,
+    _children: [],
+    _active: true,
+    _components: [],
+    _prefab: null,
+    _lpos: { __type__: 'cc.Vec3', x: 0, y: 0, z: 0 },
+    _lrot: { __type__: 'cc.Quat', x: 0, y: 0, z: 0, w: 1 },
+    _lscale: { __type__: 'cc.Vec3', x: 1, y: 1, z: 1 },
+    _mobility: 0,
+    _layer: 1073741824,
+    _euler: { __type__: 'cc.Vec3', x: 0, y: 0, z: 0 },
+    _id: '',
+  };
+}
+
+function makeCompPrefabInfo() {
+  return {
+    __type__: 'cc.CompPrefabInfo',
+    fileId: randomFileId(),
+  };
+}
+
+function makePrefabInfo() {
+  return {
+    __type__: 'cc.PrefabInfo',
+    root: { __id__: 1 },
+    asset: { __id__: 0 },
+    fileId: randomFileId(),
+    instance: null,
+    targetOverrides: null,
+    nestedPrefabInstanceRoots: null,
+  };
+}
+
+function makeUiTransform(nodeId, compPrefabId, width, height) {
+  return {
+    __type__: 'cc.UITransform',
+    _name: '',
+    _objFlags: 0,
+    __editorExtras__: {},
+    node: { __id__: nodeId },
+    _enabled: true,
+    __prefab: { __id__: compPrefabId },
+    _contentSize: { __type__: 'cc.Size', width, height },
+    _anchorPoint: { __type__: 'cc.Vec2', x: 0.5, y: 0.5 },
+    _id: '',
+  };
+}
+
+function makeWidget(nodeId, compPrefabId) {
+  return {
+    __type__: 'cc.Widget',
+    _name: '',
+    _objFlags: 0,
+    __editorExtras__: {},
+    node: { __id__: nodeId },
+    _enabled: true,
+    __prefab: { __id__: compPrefabId },
+    _alignFlags: 45,
+    _target: null,
+    _left: 0, _right: 0, _top: 0, _bottom: 0,
+    _horizontalCenter: 0, _verticalCenter: 0,
+    _isAbsLeft: true, _isAbsRight: true, _isAbsTop: true, _isAbsBottom: true,
+    _isAbsHorizontalCenter: true, _isAbsVerticalCenter: true,
+    _originalWidth: 0, _originalHeight: 0,
+    _alignMode: 2,
+    _lockFlags: 0,
+    _id: '',
+  };
+}
+
+function makeSprite(nodeId, compPrefabId, spriteFrameUuid, type = 0) {
+  return {
+    __type__: 'cc.Sprite',
+    _name: '',
+    _objFlags: 0,
+    __editorExtras__: {},
+    node: { __id__: nodeId },
+    _enabled: true,
+    __prefab: { __id__: compPrefabId },
+    _customMaterial: null,
+    _srcBlendFactor: 2,
+    _dstBlendFactor: 4,
+    _color: { __type__: 'cc.Color', r: 255, g: 255, b: 255, a: 255 },
+    _spriteFrame: spriteFrameUuid
+      ? { __uuid__: spriteFrameUuid, __expectedType__: 'cc.SpriteFrame' }
+      : null,
+    _type: type,        // 0=SIMPLE, 1=SLICED, 2=TILED, 3=FILLED
+    _fillType: 0,
+    _sizeMode: 0,
+    _fillCenter: { __type__: 'cc.Vec2', x: 0, y: 0 },
+    _fillStart: 0,
+    _fillRange: 0,
+    _isTrimmedMode: true,
+    _useGrayscale: false,
+    _atlas: null,
+    _id: '',
+  };
+}
+
+function makeLabel(nodeId, compPrefabId, text) {
+  return {
+    __type__: 'cc.Label',
+    _name: '',
+    _objFlags: 0,
+    __editorExtras__: {},
+    node: { __id__: nodeId },
+    _enabled: true,
+    __prefab: { __id__: compPrefabId },
+    _customMaterial: null,
+    _srcBlendFactor: 2,
+    _dstBlendFactor: 4,
+    _color: { __type__: 'cc.Color', r: 255, g: 255, b: 255, a: 255 },
+    _string: text || '',
+    _horizontalAlign: 1,
+    _verticalAlign: 1,
+    _actualFontSize: 40,
+    _fontSize: 40,
+    _fontFamily: 'Arial',
+    _lineHeight: 40,
+    _overflow: 0,
+    _enableWrapText: true,
+    _font: null,
+    _isSystemFontUsed: true,
+    _spacingX: 0,
+    _isItalic: false, _isBold: false, _isUnderline: false,
+    _underlineHeight: 2,
+    _cacheMode: 0,
+    _enableOutline: false,
+    _outlineColor: { __type__: 'cc.Color', r: 0, g: 0, b: 0, a: 255 },
+    _outlineWidth: 2,
+    _enableShadow: false,
+    _shadowColor: { __type__: 'cc.Color', r: 0, g: 0, b: 0, a: 255 },
+    _shadowOffset: { __type__: 'cc.Vec2', x: 2, y: 2 },
+    _shadowBlur: 2,
+    _id: '',
+  };
+}
+
+function makeProgressBar(nodeId, compPrefabId, spriteFrameUuid) {
+  // cc.ProgressBar 简化 schema — 真实 fixtures 中 Layer 含 type=3 spirit 但
+  // Login_Layer.prefab fixture 无 ProgressBar 节点. 字段尽量按 Cocos 3.8 实际 schema 写,
+  // 缺资源时降级为 null (非 unknown; 数据源权威缺失由调用方上游补).
+  return {
+    __type__: 'cc.ProgressBar',
+    _name: '',
+    _objFlags: 0,
+    __editorExtras__: {},
+    node: { __id__: nodeId },
+    _enabled: true,
+    __prefab: { __id__: compPrefabId },
+    _customMaterial: null,
+    _srcBlendFactor: 2,
+    _dstBlendFactor: 4,
+    _color: { __type__: 'cc.Color', r: 255, g: 255, b: 255, a: 255 },
+    _spriteFrame: spriteFrameUuid
+      ? { __uuid__: spriteFrameUuid, __expectedType__: 'cc.SpriteFrame' }
+      : null,
+    _type: 0,
+    _reverse: false,
+    _totalLength: 100,
+    _progress: 0,
+    _barSprite: null,
+    _mode: 0,
+    _id: '',
+  };
+}
+
+function makeEditBox(nodeId, compPrefabId, spriteFrameUuid, text) {
+  // cc.EditBox 简化 schema — 同上, fixture 无 EditBox 节点, 字段按 Cocos 3.8 实际 schema.
+  return {
+    __type__: 'cc.EditBox',
+    _name: '',
+    _objFlags: 0,
+    __editorExtras__: {},
+    node: { __id__: nodeId },
+    _enabled: true,
+    __prefab: { __id__: compPrefabId },
+    _customMaterial: null,
+    _srcBlendFactor: 2,
+    _dstBlendFactor: 4,
+    _color: { __type__: 'cc.Color', r: 255, g: 255, b: 255, a: 255 },
+    _string: text || '',
+    _placeholder: '',
+    _placeholderColor: { __type__: 'cc.Color', r: 127, g: 127, b: 127, a: 255 },
+    _maxLength: 20,
+    _inputMode: 0,
+    _inputFlag: 0,
+    _returnType: 0,
+    _backgroundImage: spriteFrameUuid
+      ? { __uuid__: spriteFrameUuid, __expectedType__: 'cc.SpriteFrame' }
+      : null,
+    _fontColor: { __type__: 'cc.Color', r: 255, g: 255, b: 255, a: 255 },
+    _fontSize: 20,
+    _lineHeight: 40,
+    _fontFamily: 'Arial',
+    _isSystemFontUsed: true,
+    _tabIndex: 0,
+    _editingDidBegin: null,
+    _textChanged: null,
+    _editingDidEnded: null,
+    _editingReturn: null,
+    _stayOnTop: false,
+    _id: '',
+  };
+}
+
+/**
+ * 将 parsed Layer 对象转为 Cocos prefab JSON 数组, schema 严格按
+ * fixtures/Login_Layer.prefab.
+ *
+ * 字段需求 (数据源权威唯一):
+ *   layer.layerName      — 必有; cc.Prefab._name / 根节点._name
+ *   layer.spirits[*].id  — 必有; spirit 唯一标识
+ *   layer.spirits[*].name — 必有; 节点._name
+ *   layer.spirits[*].type — 必有; 走 mapSpiritTypeToComponent (未知 throw)
+ *   layer.spirits[*].x/y/w/h — 必有; 走 computeLpos + computeContentSize
+ *   layer.spirits[*].group/indexOfLayer — 必有; 走 buildGroupParents
+ *   layer.spirits[*].imgResID — Sprite (type=0/5) 必有; 走 resolveSpriteFrameUuid
+ *
+ * ID 分配策略 (与 Login_Layer.prefab 1:1 对齐):
+ *   - cc.Prefab 在 array[0], 无 __id__ (data.__id__=1 引用根)
+ *   - 数组下标 i ≥ 1 的对象 __id__ = i
+ *   - 根节点 = array[1] (id=1)
+ *   - group-X 父节点顺序: 按 group ID 升序排, 紧随根节点 (id=2..K)
+ *   - Spirit 顺序: 按 group 升序, group 内按 IndexOfLayer 升序
+ *     每个 spirit 占 8 个 id: Node UIT CompInfo 主组件 CompInfo Widget CompInfo PrefabInfo
+ *   - group 末尾追加: group-X 的 UIT CompInfo Widget CompInfo PrefabInfo (5 id)
+ *   - root 末尾追加: root 的 UIT CompInfo Widget CompInfo PrefabInfo (5 id)
+ *
+ * @param {{ layerId?: string, layerName: string, spirits: Array<{ id: string, name: string, type: string, imgResID: string, x: string, y: string, w: string, h: string, group: string, indexOfLayer: string }> }} layer
+ * @returns {Array<object>} Cocos prefab JSON 数组
+ */
+export function emitPrefabJson(layer) {
+  if (!layer || !layer.layerName) {
+    throw new Error('emitPrefabJson: layer.layerName is required');
+  }
+  if (!Array.isArray(layer.spirits)) {
+    throw new Error('emitPrefabJson: layer.spirits must be an array');
+  }
+
+  const out = [];
+
+  // ── 1. cc.Prefab 头 ─────────────────────────────────────────────
+  out.push({
+    __type__: 'cc.Prefab',
+    _name: layer.layerName,
+    _objFlags: 0,
+    __editorExtras__: {},
+    _native: '',
+    data: { __id__: 1 },   // 根节点 id
+    optimizationPolicy: 0,
+    persistent: false,
+  });
+
+  // ── 2. 根节点 cc.Node (id=1) ────────────────────────────────────
+  const rootNode = makeNode(layer.layerName, null);
+  out.push(rootNode);
+  const rootId = out.length - 1;   // =1
+
+  // ── 3. group-X 父节点 ──────────────────────────────────────────
+  const { groupParents, rootChildSpiritIds } = buildGroupParents(layer.spirits);
+  const spiritById = new Map(layer.spirits.map(s => [s.id, s]));
+
+  const groupInfo = [];   // [{ group, node, nodeId }]
+  for (const g of groupParents) {
+    const node = makeNode(g.name, { __id__: rootId });
+    out.push(node);
+    groupInfo.push({ group: g, node, nodeId: out.length - 1 });
+  }
+
+  // ── 4. Spirit 子节点 + 组件 ────────────────────────────────────
+  const spiritInfo = new Map();   // spiritId → { node, nodeId, prefabInfoId }
+
+  for (const gi of groupInfo) {
+    for (const spiritId of gi.group.childSpiritIds) {
+      const spirit = spiritById.get(spiritId);
+      if (!spirit) {
+        throw new Error(`emitPrefabJson: spirit id ${spiritId} referenced by ${gi.group.name} but not found in layer.spirits`);
+      }
+      const info = buildSpiritBlock(spirit, { __id__: gi.nodeId }, out);
+      spiritInfo.set(spiritId, info);
+      gi.node._children.push({ __id__: info.nodeId });
+    }
+  }
+
+  for (const spiritId of rootChildSpiritIds) {
+    const spirit = spiritById.get(spiritId);
+    if (!spirit) {
+      throw new Error(`emitPrefabJson: root child spirit id ${spiritId} not found in layer.spirits`);
+    }
+    const info = buildSpiritBlock(spirit, { __id__: rootId }, out);
+    spiritInfo.set(spiritId, info);
+    rootNode._children.push({ __id__: info.nodeId });
+  }
+
+  // ── 5. group-X 末尾 UITransform + Widget + PrefabInfo ──────────
+  for (const gi of groupInfo) {
+    appendNodeEnvelope(gi.node, gi.nodeId, out);
+  }
+
+  // ── 6. 根节点末尾 UITransform + Widget + PrefabInfo ───────────
+  appendNodeEnvelope(rootNode, rootId, out);
+
+  return out;
+}
+
+/**
+ * 构造单个 Spirit 的所有对象 (Node + UITransform + CompPrefabInfo + 主组件 +
+ * CompPrefabInfo + Widget + CompPrefabInfo + PrefabInfo), 按 schema 顺序 push
+ * 到 out 数组, 返回关键 id 供外层 wiring.
+ */
+function buildSpiritBlock(spirit, parentRef, out) {
+  const lpos = computeLpos(spirit);
+  const size = computeContentSize(spirit);
+  const componentName = mapSpiritTypeToComponent(spirit.type);
+
+  // 1. cc.Node (主组件 id=K+0)
+  const node = makeNode(spirit.name, parentRef);
+  node._lpos = { __type__: 'cc.Vec3', x: lpos.x, y: lpos.y, z: lpos.z };
+  out.push(node);
+  const nodeId = out.length - 1;
+
+  // 2. cc.UITransform (K+1)
+  const uiCompInfo = makeCompPrefabInfo();
+  out.push(uiCompInfo);
+  const uiCompInfoId = out.length - 1;
+  const uiTransform = makeUiTransform(nodeId, uiCompInfoId, size.width, size.height);
+  out.push(uiTransform);
+  const uiId = out.length - 1;
+
+  // 3. 主组件 (K+3) — CompPrefabInfo 先 push (K+2), 主组件 __prefab → 该 CompPrefabInfo
+  const mainCompInfo = makeCompPrefabInfo();
+  out.push(mainCompInfo);
+  const mainCompInfoId = out.length - 1;
+
+  const spriteFrameUuid = (spirit.type === '0' || spirit.type === '3' || spirit.type === '5')
+    ? resolveSpriteFrameUuid(spirit.imgResID)
+    : null;
+
+  let mainComp;
+  if (componentName === 'cc.Sprite') {
+    const spriteType = spirit.type === '5' ? 1 : 0;   // 5=SLICED, else SIMPLE
+    mainComp = makeSprite(nodeId, mainCompInfoId, spriteFrameUuid, spriteType);
+  } else if (componentName === 'cc.Label') {
+    mainComp = makeLabel(nodeId, mainCompInfoId, spirit.name);
+  } else if (componentName === 'cc.ProgressBar') {
+    mainComp = makeProgressBar(nodeId, mainCompInfoId, spriteFrameUuid);
+  } else if (componentName === 'cc.EditBox') {
+    mainComp = makeEditBox(nodeId, mainCompInfoId, spriteFrameUuid, spirit.name);
+  } else {
+    // 数据源权威唯一: mapSpiritTypeToComponent 已 throw "unknown" 情况, 此处兜底是
+    // 防御性 — 若新增组件类型但未在 makeXxx 注册, 显式报错暴露.
+    throw new Error(`emitPrefabJson: component "${componentName}" not yet supported by emitPrefabJson — add makeXxx helper for SpiritType ${spirit.type}`);
+  }
+  out.push(mainComp);
+  const mainCompId = out.length - 1;
+
+  // 4. cc.Widget (K+5) — CompPrefabInfo 先 push (K+4)
+  const widgetCompInfo = makeCompPrefabInfo();
+  out.push(widgetCompInfo);
+  const widgetCompInfoId = out.length - 1;
+  const widget = makeWidget(nodeId, widgetCompInfoId);
+  out.push(widget);
+  const widgetId = out.length - 1;
+
+  // 5. cc.PrefabInfo (K+7) — Node 的 _prefab 指向这里
+  const prefabInfo = makePrefabInfo();
+  out.push(prefabInfo);
+  const prefabInfoId = out.length - 1;
+
+  // ── Wire up Node ────────────────────────────────────────────
+  node._components.push({ __id__: uiId }, { __id__: mainCompId }, { __id__: widgetId });
+  node._prefab = { __id__: prefabInfoId };
+
+  return { node, nodeId, prefabInfoId };
+}
+
+/**
+ * 给非 Spirit 节点 (root / group-X) 追加末尾的 UITransform + Widget + PrefabInfo
+ * 块, 并把 node._components / node._prefab 补齐.
+ */
+function appendNodeEnvelope(node, nodeId, out) {
+  // 1. UITransform + CompPrefabInfo
+  const uiCompInfo = makeCompPrefabInfo();
+  out.push(uiCompInfo);
+  const uiCompInfoId = out.length - 1;
+  const uiTransform = makeUiTransform(nodeId, uiCompInfoId, DESIGN_WIDTH, DESIGN_HEIGHT);
+  out.push(uiTransform);
+  const uiId = out.length - 1;
+
+  // 2. Widget + CompPrefabInfo
+  const widgetCompInfo = makeCompPrefabInfo();
+  out.push(widgetCompInfo);
+  const widgetCompInfoId = out.length - 1;
+  const widget = makeWidget(nodeId, widgetCompInfoId);
+  out.push(widget);
+  const widgetId = out.length - 1;
+
+  // 3. PrefabInfo
+  const prefabInfo = makePrefabInfo();
+  out.push(prefabInfo);
+  const prefabInfoId = out.length - 1;
+
+  node._components.push({ __id__: uiId }, { __id__: widgetId });
+  node._prefab = { __id__: prefabInfoId };
+}