diff --git a/cocoscreator_projects/scripts/lib/paths.mjs b/cocoscreator_projects/scripts/lib/paths.mjs
index 721620e..2f8ab21 100644
--- a/cocoscreator_projects/scripts/lib/paths.mjs
+++ b/cocoscreator_projects/scripts/lib/paths.mjs
@@ -8,6 +8,13 @@ export const HOST_PROJECT = join(ROOT, 'YouleNexus');
 export const FRAMEWORK_SRC = join(HOST_PROJECT, 'assets', 'framework');
 export const GAMES_DIR = join(ROOT, 'games');
 export const SEED_DIR = join(ROOT, 'templates', 'game-seed');
+export const FRAMEWORK_UI_DIR = join(FRAMEWORK_SRC, 'ui');
+export const BUILD_WORKSPACE = join(ROOT, 'build-workspace');
+
+// 子游戏的皮肤覆盖目录
+export function gameOverrideDir(projectDir) {
+  return join(projectDir, 'assets', 'game', 'override');
+}
 
 export function readCreatorVersion(projectDir) {
   try {
diff --git a/cocoscreator_projects/scripts/lib/skin.mjs b/cocoscreator_projects/scripts/lib/skin.mjs
new file mode 100644
index 0000000..b1698a6
--- /dev/null
+++ b/cocoscreator_projects/scripts/lib/skin.mjs
@@ -0,0 +1,101 @@
+import { readdirSync, statSync, readFileSync, existsSync } from 'node:fs';
+import { join, posix, sep, extname, relative } from 'node:path';
+
+const IMAGE_EXTS = new Set(['.png', '.jpg', '.jpeg', '.webp']);
+const SPINE_ROOT = 'spine';          // framework/ui/spine/<资源名>/ 为一套 Spine
+const SKIPPED = new Set(['.gitkeep']);
+
+/** 列出目录下所有资源的相对路径（正斜杠），排除 .meta 与 .gitkeep。 */
+export function listAssets(dir) {
+  if (!existsSync(dir)) return [];
+  const out = [];
+  (function walk(cur) {
+    for (const name of readdirSync(cur)) {
+      const p = join(cur, name);
+      if (statSync(p).isDirectory()) { walk(p); continue; }
+      if (name.endsWith('.meta') || SKIPPED.has(name)) continue;
+      out.push(relative(dir, p).split(sep).join(posix.sep));
+    }
+  })(dir);
+  return out;
+}
+
+/** 读 PNG 宽高；非 PNG 或读取失败返回 null。 */
+export function readPngSize(file) {
+  try {
+    const b = readFileSync(file);
+    if (b.length < 24 || b.toString('ascii', 1, 4) !== 'PNG') return null;
+    return { width: b.readUInt32BE(16), height: b.readUInt32BE(20) };
+  } catch { return null; }
+}
+
+const isImage = (rel) => IMAGE_EXTS.has(extname(rel).toLowerCase());
+const isSpine = (rel) => rel.split(posix.sep)[0] === SPINE_ROOT;
+/** Spine 资源的分组键：spine/<资源名> */
+const spineGroup = (rel) => rel.split(posix.sep).slice(0, 2).join(posix.sep);
+
+/**
+ * 校验 override 是否合法。规则见 spec §3.2。
+ * 返回 { matched: 相对路径[], errors: {path, code, message}[] }。
+ */
+export function validateOverrides(frameworkUiDir, overrideDir) {
+  const fwList = listAssets(frameworkUiDir);
+  const fwSet = new Set(fwList);
+  const ovList = listAssets(overrideDir);
+  const ovSet = new Set(ovList);
+
+  const matched = [];
+  const errors = [];
+
+  // 1) 逐个 override 校验：孤儿 / 尺寸
+  for (const rel of ovList) {
+    if (!fwSet.has(rel)) {
+      const base = rel.slice(0, rel.length - extname(rel).length);
+      const alt = fwList.find((f) => f.slice(0, f.length - extname(f).length) === base);
+      errors.push({
+        path: rel,
+        code: 'orphan',
+        message: alt
+          ? `框架里没有 ${rel}，但存在同名的 ${alt}——扩展名对不上`
+          : `框架里没有对应资源：${rel}`,
+      });
+      continue;
+    }
+
+    // Spine 贴图豁免尺寸校验（区域坐标在 .atlas 内，整套替换时自洽）
+    const metaPath = join(overrideDir, ...`${rel}.meta`.split(posix.sep));
+    const needSizeCheck =
+      isImage(rel) && !isSpine(rel) && !existsSync(metaPath);
+    if (needSizeCheck) {
+      const a = readPngSize(join(frameworkUiDir, ...rel.split(posix.sep)));
+      const b = readPngSize(join(overrideDir, ...rel.split(posix.sep)));
+      if (a && b && (a.width !== b.width || a.height !== b.height)) {
+        errors.push({
+          path: rel,
+          code: 'size-mismatch',
+          message:
+            `尺寸不一致：框架 ${a.width}x${a.height}，override ${b.width}x${b.height}。` +
+            `请改为同尺寸，或连 .meta 一起提供（例外通道）`,
+        });
+        continue;
+      }
+    }
+    matched.push(rel);
+  }
+
+  // 2) Spine 整套完整性：override 动了某套，就必须整套都在
+  const touchedGroups = new Set(ovList.filter(isSpine).map(spineGroup));
+  for (const g of touchedGroups) {
+    const required = fwList.filter((f) => isSpine(f) && spineGroup(f) === g);
+    const missing = required.filter((f) => !ovSet.has(f));
+    if (missing.length) {
+      errors.push({
+        path: g,
+        code: 'spine-incomplete',
+        message: `Spine 必须整套覆盖，缺少：${missing.join('、')}`,
+      });
+    }
+  }
+
+  return { matched, errors };
+}
diff --git a/cocoscreator_projects/scripts/test/skin.test.mjs b/cocoscreator_projects/scripts/test/skin.test.mjs
new file mode 100644
index 0000000..e413bae
--- /dev/null
+++ b/cocoscreator_projects/scripts/test/skin.test.mjs
@@ -0,0 +1,186 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import { join } from 'node:path';
+import { mkdirSync, writeFileSync, rmSync, mkdtempSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { deflateSync } from 'node:zlib';
+import { listAssets, readPngSize, validateOverrides } from '../lib/skin.mjs';
+
+// ---- 测试辅助：零依赖生成指定尺寸的 PNG ----
+function crc32(buf) {
+  let c = ~0;
+  for (const x of buf) { c ^= x; for (let i = 0; i < 8; i++) c = (c >>> 1) ^ (0xEDB88320 & -(c & 1)); }
+  return ~c >>> 0;
+}
+function chunk(type, data) {
+  const len = Buffer.alloc(4); len.writeUInt32BE(data.length);
+  const td = Buffer.concat([Buffer.from(type, 'ascii'), data]);
+  const c = Buffer.alloc(4); c.writeUInt32BE(crc32(td));
+  return Buffer.concat([len, td, c]);
+}
+function makePng(w, h) {
+  const ihdr = Buffer.alloc(13);
+  ihdr.writeUInt32BE(w, 0); ihdr.writeUInt32BE(h, 4); ihdr[8] = 8; ihdr[9] = 2;
+  const raw = Buffer.alloc(h * (1 + w * 3));
+  return Buffer.concat([
+    Buffer.from([137, 80, 78, 71, 13, 10, 26, 10]),
+    chunk('IHDR', ihdr), chunk('IDAT', deflateSync(raw)), chunk('IEND', Buffer.alloc(0)),
+  ]);
+}
+function writeFile(dir, rel, content) {
+  const p = join(dir, ...rel.split('/'));
+  mkdirSync(join(p, '..'), { recursive: true });
+  writeFileSync(p, content);
+  return p;
+}
+function png(dir, rel, w = 64, h = 64) { return writeFile(dir, rel, makePng(w, h)); }
+
+function makeDirs() {
+  const root = mkdtempSync(join(tmpdir(), 'youle-skin-'));
+  const fw = join(root, 'ui'); const ov = join(root, 'override');
+  mkdirSync(fw, { recursive: true }); mkdirSync(ov, { recursive: true });
+  return { root, fw, ov };
+}
+function cleanup(root) { rmSync(root, { recursive: true, force: true }); }
+
+// ---- listAssets ----
+test('listAssets 返回正斜杠相对路径，排除 .meta 与 .gitkeep', () => {
+  const d = makeDirs();
+  try {
+    png(d.fw, 'atlas-hall/btn.png');
+    writeFile(d.fw, 'atlas-hall/btn.png.meta', '{}');
+    writeFile(d.fw, 'audio/.gitkeep', '');
+    writeFile(d.fw, 'audio/click.wav', 'x');
+    assert.deepEqual(listAssets(d.fw).sort(), ['atlas-hall/btn.png', 'audio/click.wav']);
+  } finally { cleanup(d.root); }
+});
+
+test('listAssets 对不存在的目录返回空数组', () => {
+  assert.deepEqual(listAssets('/no/such/dir'), []);
+});
+
+// ---- readPngSize ----
+test('readPngSize 读出宽高；非 PNG 返回 null', () => {
+  const d = makeDirs();
+  try {
+    const p = png(d.fw, 'a.png', 128, 64);
+    assert.deepEqual(readPngSize(p), { width: 128, height: 64 });
+    const w = writeFile(d.fw, 'b.wav', 'not a png');
+    assert.equal(readPngSize(w), null);
+  } finally { cleanup(d.root); }
+});
+
+// ---- validateOverrides：正常命中 ----
+test('同名同尺寸图片：命中，无错误', () => {
+  const d = makeDirs();
+  try {
+    png(d.fw, 'atlas-hall/btn.png', 64, 64);
+    png(d.ov, 'atlas-hall/btn.png', 64, 64);
+    const r = validateOverrides(d.fw, d.ov);
+    assert.deepEqual(r.errors, []);
+    assert.deepEqual(r.matched, ['atlas-hall/btn.png']);
+  } finally { cleanup(d.root); }
+});
+
+test('框架有、子游戏未覆盖：不是错误', () => {
+  const d = makeDirs();
+  try {
+    png(d.fw, 'atlas-hall/a.png');
+    png(d.fw, 'atlas-hall/b.png');
+    png(d.ov, 'atlas-hall/a.png');
+    const r = validateOverrides(d.fw, d.ov);
+    assert.deepEqual(r.errors, []);
+    assert.deepEqual(r.matched, ['atlas-hall/a.png']);
+  } finally { cleanup(d.root); }
+});
+
+// ---- validateOverrides：孤儿 ----
+test('override 在框架里找不到对应路径 → orphan', () => {
+  const d = makeDirs();
+  try {
+    png(d.fw, 'atlas-hall/btn.png');
+    png(d.ov, 'atlas-hall/typo.png');
+    const r = validateOverrides(d.fw, d.ov);
+    assert.equal(r.errors.length, 1);
+    assert.equal(r.errors[0].code, 'orphan');
+    assert.equal(r.errors[0].path, 'atlas-hall/typo.png');
+  } finally { cleanup(d.root); }
+});
+
+test('同名不同扩展名 → orphan，且提示框架里的实际扩展名', () => {
+  const d = makeDirs();
+  try {
+    png(d.fw, 'atlas-hall/btn.png');
+    writeFile(d.ov, 'atlas-hall/btn.jpg', 'x');
+    const r = validateOverrides(d.fw, d.ov);
+    assert.equal(r.errors[0].code, 'orphan');
+    assert.match(r.errors[0].message, /btn\.png/);
+  } finally { cleanup(d.root); }
+});
+
+// ---- validateOverrides：尺寸 ----
+test('图片尺寸不同且未带 meta → size-mismatch', () => {
+  const d = makeDirs();
+  try {
+    png(d.fw, 'atlas-hall/btn.png', 64, 64);
+    png(d.ov, 'atlas-hall/btn.png', 128, 128);
+    const r = validateOverrides(d.fw, d.ov);
+    assert.equal(r.errors.length, 1);
+    assert.equal(r.errors[0].code, 'size-mismatch');
+    assert.match(r.errors[0].message, /64x64/);
+    assert.match(r.errors[0].message, /128x128/);
+  } finally { cleanup(d.root); }
+});
+
+test('图片尺寸不同但自带 meta（例外通道）→ 通过', () => {
+  const d = makeDirs();
+  try {
+    png(d.fw, 'atlas-hall/btn.png', 64, 64);
+    png(d.ov, 'atlas-hall/btn.png', 128, 128);
+    writeFile(d.ov, 'atlas-hall/btn.png.meta', '{"ver":"1.0.0"}');
+    const r = validateOverrides(d.fw, d.ov);
+    assert.deepEqual(r.errors, []);
+    assert.deepEqual(r.matched, ['atlas-hall/btn.png']);
+  } finally { cleanup(d.root); }
+});
+
+test('非图片资源（音效）不做尺寸校验', () => {
+  const d = makeDirs();
+  try {
+    writeFile(d.fw, 'audio/click.wav', 'aaaa');
+    writeFile(d.ov, 'audio/click.wav', 'bbbbbbbbbbbb');
+    const r = validateOverrides(d.fw, d.ov);
+    assert.deepEqual(r.errors, []);
+  } finally { cleanup(d.root); }
+});
+
+// ---- validateOverrides：Spine ----
+test('Spine 整套覆盖 → 通过，且贴图豁免尺寸校验', () => {
+  const d = makeDirs();
+  try {
+    writeFile(d.fw, 'spine/hero/hero.json', '{}');
+    writeFile(d.fw, 'spine/hero/hero.atlas', 'atlas');
+    png(d.fw, 'spine/hero/hero.png', 64, 64);
+    writeFile(d.ov, 'spine/hero/hero.json', '{"v":2}');
+    writeFile(d.ov, 'spine/hero/hero.atlas', 'atlas2');
+    png(d.ov, 'spine/hero/hero.png', 256, 256);   // 尺寸不同也应通过
+    const r = validateOverrides(d.fw, d.ov);
+    assert.deepEqual(r.errors, []);
+    assert.equal(r.matched.length, 3);
+  } finally { cleanup(d.root); }
+});
+
+test('Spine 缺件 → spine-incomplete，并列出缺少的文件', () => {
+  const d = makeDirs();
+  try {
+    writeFile(d.fw, 'spine/hero/hero.json', '{}');
+    writeFile(d.fw, 'spine/hero/hero.atlas', 'atlas');
+    png(d.fw, 'spine/hero/hero.png', 64, 64);
+    png(d.ov, 'spine/hero/hero.png', 64, 64);     // 只换贴图
+    const r = validateOverrides(d.fw, d.ov);
+    assert.equal(r.errors.length, 1);
+    assert.equal(r.errors[0].code, 'spine-incomplete');
+    assert.match(r.errors[0].message, /hero\.json/);
+    assert.match(r.errors[0].message, /hero\.atlas/);
+  } finally { cleanup(d.root); }
+});