diff --git a/.commitlintrc.json b/.commitlintrc.json
new file mode 100644
index 00000000..c1066884
--- /dev/null
+++ b/.commitlintrc.json
@@ -0,0 +1,41 @@
+{
+  "extends": ["@commitlint/config-conventional"],
+  "rules": {
+    "type-enum": [
+      2,
+      "always",
+      [
+        "feat",
+        "fix",
+        "docs",
+        "style",
+        "refactor",
+        "perf",
+        "test",
+        "build",
+        "ci",
+        "chore",
+        "revert"
+      ]
+    ],
+    "scope-enum": [
+      2,
+      "always",
+      [
+        "core",
+        "math",
+        "network-client",
+        "network-server",
+        "network-shared",
+        "editor",
+        "docs",
+        "ci",
+        "deps"
+      ]
+    ],
+    "scope-empty": [1, "never"],
+    "subject-empty": [2, "never"],
+    "subject-case": [0],
+    "header-max-length": [2, "always", 100]
+  }
+}
diff --git a/.github/labels.yml b/.github/labels.yml
new file mode 100644
index 00000000..0a4b9e74
--- /dev/null
+++ b/.github/labels.yml
@@ -0,0 +1,95 @@
+# GitHub Labels 配置
+# 可以使用 https://github.com/Financial-Times/github-label-sync 来同步标签
+
+# Size Labels (PR 大小)
+- name: 'size/XS'
+  color: '00ff00'
+  description: '极小的改动 (< 10 行)'
+
+- name: 'size/S'
+  color: '00ff00'
+  description: '小改动 (10-100 行)'
+
+- name: 'size/M'
+  color: 'ffff00'
+  description: '中等改动 (100-500 行)'
+
+- name: 'size/L'
+  color: 'ff9900'
+  description: '大改动 (500-1000 行)'
+
+- name: 'size/XL'
+  color: 'ff0000'
+  description: '超大改动 (> 1000 行)'
+
+# Type Labels
+- name: 'bug'
+  color: 'd73a4a'
+  description: '错误或问题'
+
+- name: 'enhancement'
+  color: 'a2eeef'
+  description: '新功能或改进'
+
+- name: 'documentation'
+  color: '0075ca'
+  description: '文档相关'
+
+- name: 'question'
+  color: 'd876e3'
+  description: '问题咨询'
+
+- name: 'performance'
+  color: 'ff6b6b'
+  description: '性能相关'
+
+# Scope Labels
+- name: 'core'
+  color: '5319e7'
+  description: '核心包相关'
+
+- name: 'editor'
+  color: '5319e7'
+  description: '编辑器相关'
+
+- name: 'network'
+  color: '5319e7'
+  description: '网络相关'
+
+# Status Labels
+- name: 'stale'
+  color: 'ededed'
+  description: '长时间无活动'
+
+- name: 'wip'
+  color: 'fbca04'
+  description: '进行中'
+
+- name: 'help wanted'
+  color: '008672'
+  description: '需要帮助'
+
+- name: 'good first issue'
+  color: '7057ff'
+  description: '适合新手'
+
+- name: 'quick-review'
+  color: '00ff00'
+  description: '小改动，快速 Review'
+
+- name: 'automerge'
+  color: 'bfdadc'
+  description: '自动合并'
+
+- name: 'pinned'
+  color: 'c2e0c6'
+  description: '置顶，不会被标记为 stale'
+
+- name: 'security'
+  color: 'ee0701'
+  description: '安全相关，高优先级'
+
+# Dependencies
+- name: 'dependencies'
+  color: '0366d6'
+  description: '依赖更新'
diff --git a/.github/workflows/commitlint.yml b/.github/workflows/commitlint.yml
new file mode 100644
index 00000000..a7e8bfb2
--- /dev/null
+++ b/.github/workflows/commitlint.yml
@@ -0,0 +1,31 @@
+name: Commit Lint
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: read
+
+jobs:
+  commitlint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: 'npm'
+
+      - name: Install commitlint
+        run: |
+          npm install --save-dev @commitlint/config-conventional @commitlint/cli
+
+      - name: Validate PR commits
+        run: npx commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose
diff --git a/.github/workflows/pr-size-labeler.yml b/.github/workflows/pr-size-labeler.yml
new file mode 100644
index 00000000..11fa1feb
--- /dev/null
+++ b/.github/workflows/pr-size-labeler.yml
@@ -0,0 +1,31 @@
+name: PR Size Labeler
+
+on:
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+permissions:
+  contents: read
+  pull-requests: write
+
+jobs:
+  size-label:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Label PR by size
+        uses: codelytv/pr-size-labeler@v1
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          xs_label: 'size/XS'
+          xs_max_size: '10'
+          s_label: 'size/S'
+          s_max_size: '100'
+          m_label: 'size/M'
+          m_max_size: '500'
+          l_label: 'size/L'
+          l_max_size: '1000'
+          xl_label: 'size/XL'
+          message_if_xl: |
+            这个 PR 改动较大（超过 1000 行），建议拆分成多个小 PR 以便 Review。
+
+            This PR is quite large (over 1000 lines). Consider splitting it into smaller PRs for easier review.
diff --git a/.github/workflows/size-limit.yml b/.github/workflows/size-limit.yml
new file mode 100644
index 00000000..e53d4d85
--- /dev/null
+++ b/.github/workflows/size-limit.yml
@@ -0,0 +1,43 @@
+name: Size Limit
+
+on:
+  pull_request:
+    branches:
+      - master
+      - main
+    paths:
+      - 'packages/core/src/**'
+      - 'packages/core/package.json'
+      - '.size-limit.json'
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+
+jobs:
+  size:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.x'
+          cache: 'npm'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build core package
+        run: |
+          cd packages/core
+          npm run build:npm
+
+      - name: Check bundle size
+        uses: andresz1/size-limit-action@v1
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          skip_step: install
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
new file mode 100644
index 00000000..1feaeff0
--- /dev/null
+++ b/.github/workflows/stale.yml
@@ -0,0 +1,60 @@
+name: Stale Issues and PRs
+
+on:
+  schedule:
+    - cron: '0 0 * * *'  # 每天运行一次
+  workflow_dispatch:  # 允许手动触发
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Stale Bot
+        uses: actions/stale@v9
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+          # Issue 配置
+          stale-issue-message: |
+            这个 issue 已经 60 天没有活动了，将在 14 天后自动关闭。
+            如果这个问题仍然存在，请留言说明情况。
+
+            This issue has been inactive for 60 days and will be closed in 14 days.
+            If this issue is still relevant, please leave a comment.
+          close-issue-message: |
+            由于长时间无活动，这个 issue 已被自动关闭。
+            如需重新打开，请留言说明。
+
+            This issue has been automatically closed due to inactivity.
+            Please comment if you'd like to reopen it.
+          days-before-issue-stale: 60
+          days-before-issue-close: 14
+          stale-issue-label: 'stale'
+          exempt-issue-labels: 'pinned,security,enhancement,help wanted'
+
+          # PR 配置
+          stale-pr-message: |
+            这个 PR 已经 30 天没有活动了，将在 7 天后自动关闭。
+            如果你还在处理这个 PR，请更新一下。
+
+            This PR has been inactive for 30 days and will be closed in 7 days.
+            If you're still working on it, please update it.
+          close-pr-message: |
+            由于长时间无活动，这个 PR 已被自动关闭。
+            如需继续，请重新打开或创建新的 PR。
+
+            This PR has been automatically closed due to inactivity.
+            Please reopen or create a new PR to continue.
+          days-before-pr-stale: 30
+          days-before-pr-close: 7
+          stale-pr-label: 'stale'
+          exempt-pr-labels: 'pinned,security,wip'
+
+          # 其他配置
+          operations-per-run: 100
+          remove-stale-when-updated: true
+          ascending: true
diff --git a/.github/workflows/welcome.yml b/.github/workflows/welcome.yml
new file mode 100644
index 00000000..7c4fabf9
--- /dev/null
+++ b/.github/workflows/welcome.yml
@@ -0,0 +1,58 @@
+name: Welcome
+
+on:
+  issues:
+    types: [opened]
+  pull_request_target:
+    types: [opened]
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  welcome:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Welcome new contributors
+        uses: actions/first-interaction@v1
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          issue-message: |
+            👋 你好！感谢你提交第一个 issue！
+
+            我们会尽快查看并回复。同时，建议你：
+            - 📚 查看[文档](https://esengine.github.io/ecs-framework/)
+            - 🤖 使用 [AI 文档助手](https://deepwiki.com/esengine/ecs-framework)
+            - 💬 加入 [QQ 交流群](https://jq.qq.com/?_wv=1027&k=29w1Nud6)
+
+            ---
+
+            👋 Hello! Thanks for opening your first issue!
+
+            We'll review it as soon as possible. Meanwhile, you might want to:
+            - 📚 Check the [documentation](https://esengine.github.io/ecs-framework/)
+            - 🤖 Use [AI documentation assistant](https://deepwiki.com/esengine/ecs-framework)
+
+          pr-message: |
+            👋 你好！感谢你提交第一个 Pull Request！
+
+            在我们 Review 之前，请确保：
+            - ✅ 代码遵循项目规范
+            - ✅ 通过所有测试
+            - ✅ 更新了相关文档
+            - ✅ Commit 遵循 [Conventional Commits](https://www.conventionalcommits.org/) 规范
+
+            查看完整的[贡献指南](https://github.com/esengine/ecs-framework/blob/master/CONTRIBUTING.md)。
+
+            ---
+
+            👋 Hello! Thanks for your first Pull Request!
+
+            Before we review, please ensure:
+            - ✅ Code follows project conventions
+            - ✅ All tests pass
+            - ✅ Documentation is updated
+            - ✅ Commits follow [Conventional Commits](https://www.conventionalcommits.org/)
+
+            See the full [Contributing Guide](https://github.com/esengine/ecs-framework/blob/master/CONTRIBUTING.md).
diff --git a/.mergify.yml b/.mergify.yml
new file mode 100644
index 00000000..c8740485
--- /dev/null
+++ b/.mergify.yml
@@ -0,0 +1,84 @@
+queue_rules:
+  - name: default
+    conditions:
+      - check-success=CI
+      - check-success=Commit Lint
+
+pull_request_rules:
+  # 自动合并 Dependabot 的 patch 版本更新
+  - name: 自动合并 Dependabot patch 更新
+    conditions:
+      - author=dependabot[bot]
+      - check-success=CI
+      - check-success=Commit Lint
+      - title~=^build\(deps\): bump .* from .* to .*
+      - files~=^package-lock\.json$
+    actions:
+      review:
+        type: APPROVE
+        message: 自动批准 Dependabot 的 patch 更新
+      queue:
+        name: default
+        method: squash
+        commit_message_template: |
+          {{ title }} (#{{ number }})
+
+          {{ body }}
+
+  # 自动合并有 'automerge' 标签且测试通过的 PR
+  - name: 自动合并标记的 PR
+    conditions:
+      - label=automerge
+      - check-success=CI
+      - check-success=Commit Lint
+      - "#approved-reviews-by>=1"
+      - "#changes-requested-reviews-by=0"
+    actions:
+      queue:
+        name: default
+        method: squash
+
+  # 自动给小 PR 添加标签
+  - name: 标记小 PR 方便快速 Review
+    conditions:
+      - files<=3
+      - lines<=50
+    actions:
+      label:
+        add:
+          - quick-review
+
+  # 提醒大 PR 需要拆分
+  - name: 提醒大 PR
+    conditions:
+      - lines>1000
+    actions:
+      comment:
+        message: |
+          ⚠️ 这个 PR 改动超过 1000 行，建议拆分成多个小 PR，便于 Review 和测试。
+
+          ⚠️ This PR has over 1000 lines changed. Consider splitting it into smaller PRs for easier review and testing.
+
+  # 自动更新过期的分支
+  - name: 自动更新过期分支
+    conditions:
+      - -draft
+      - -closed
+      - base=master
+      - "#approved-reviews-by>=1"
+    actions:
+      update:
+        method: rebase
+
+  # 感谢首次贡献者
+  - name: 感谢新贡献者
+    conditions:
+      - author!=dependabot[bot]
+      - author!=dependabot-preview[bot]
+      - "#commits-behind=0"
+    actions:
+      comment:
+        message: |
+          🎉 感谢你的贡献！我们会尽快 Review。
+
+          🎉 Thanks for your contribution! We'll review it soon.
diff --git a/.size-limit.json b/.size-limit.json
new file mode 100644
index 00000000..dd0b8c5e
--- /dev/null
+++ b/.size-limit.json
@@ -0,0 +1,25 @@
+[
+  {
+    "name": "@esengine/ecs-framework (ESM)",
+    "path": "packages/core/dist/esm/index.js",
+    "import": "*",
+    "limit": "50 KB",
+    "webpack": false,
+    "gzip": true
+  },
+  {
+    "name": "@esengine/ecs-framework (UMD)",
+    "path": "packages/core/dist/umd/ecs-framework.js",
+    "limit": "60 KB",
+    "webpack": false,
+    "gzip": true
+  },
+  {
+    "name": "Core Runtime (Tree-shaking)",
+    "path": "packages/core/dist/esm/index.js",
+    "import": "{ Core, Scene, Entity, Component }",
+    "limit": "30 KB",
+    "webpack": false,
+    "gzip": true
+  }
+]
diff --git a/package.json b/package.json
index 13e6dc18..2af582a3 100644
--- a/package.json
+++ b/package.json
@@ -69,6 +69,8 @@
   "author": "yhh",
   "license": "MIT",
   "devDependencies": {
+    "@commitlint/cli": "^18.6.0",
+    "@commitlint/config-conventional": "^18.6.0",
     "@iconify/json": "^2.2.388",
     "@rollup/plugin-commonjs": "^28.0.3",
     "@rollup/plugin-node-resolve": "^16.0.1",
@@ -79,6 +81,7 @@
     "@semantic-release/github": "^9.2.6",
     "@semantic-release/npm": "^11.0.2",
     "@semantic-release/release-notes-generator": "^12.1.0",
+    "@size-limit/preset-small-lib": "^11.0.2",
     "@types/jest": "^29.5.14",
     "@types/node": "^20.19.0",
     "@typescript-eslint/eslint-plugin": "^8.46.1",
@@ -95,6 +98,7 @@
     "semantic-release": "^23.0.0",
     "semantic-release-monorepo": "^8.0.2",
     "semver": "^7.6.3",
+    "size-limit": "^11.0.2",
     "ts-jest": "^29.4.0",
     "typedoc": "^0.28.13",
     "typedoc-plugin-markdown": "^4.9.0",