diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 39c0cc7..6ed9871 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,3 +21,19 @@ jobs:
       - run: rm -f package-lock.json && npm install
       - run: npm run lint
       - run: npm test
+
+  coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+      - run: rm -f package-lock.json && npm install
+      - run: npm run test:coverage
+      - uses: codecov/codecov-action@v5
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage/lcov.info
+          fail_ci_if_error: false
diff --git a/README.md b/README.md
index f872a23..b8735c0 100644
--- a/README.md
+++ b/README.md
@@ -4,10 +4,12 @@ The lightweight multi-agent orchestration engine for TypeScript. Three runtime d
 
 CrewAI is Python. LangGraph makes you draw the graph by hand. `open-multi-agent` is the `npm install` you drop into an existing Node.js backend when you need a team of agents to work on a goal together. Nothing more, nothing less.
 
+[![npm version](https://img.shields.io/npm/v/@jackchen_me/open-multi-agent)](https://www.npmjs.com/package/@jackchen_me/open-multi-agent)
 [![GitHub stars](https://img.shields.io/github/stars/JackChen-me/open-multi-agent)](https://github.com/JackChen-me/open-multi-agent/stargazers)
 [![license](https://img.shields.io/github/license/JackChen-me/open-multi-agent)](./LICENSE)
 [![TypeScript](https://img.shields.io/badge/TypeScript-5.6-blue)](https://www.typescriptlang.org/)
-[![coverage](https://img.shields.io/badge/coverage-85%25-brightgreen)](https://github.com/JackChen-me/open-multi-agent/actions)
+[![bundle size](https://img.shields.io/bundlephobia/minzip/@jackchen_me/open-multi-agent)](https://bundlephobia.com/package/@jackchen_me/open-multi-agent)
+[![codecov](https://codecov.io/gh/JackChen-me/open-multi-agent/graph/badge.svg)](https://codecov.io/gh/JackChen-me/open-multi-agent)
 
 **English** | [中文](./README_zh.md)
 
@@ -456,7 +458,7 @@ Issues, feature requests, and PRs are welcome. Some areas where contributions wo
 ## Contributors
 
 <a href="https://github.com/JackChen-me/open-multi-agent/graphs/contributors">
-  <img src="https://contrib.rocks/image?repo=JackChen-me/open-multi-agent&max=20&v=20260411" />
+  <img src="https://contrib.rocks/image?repo=JackChen-me/open-multi-agent&max=20&v=20260419" />
 </a>
 
 ## Star History
diff --git a/README_zh.md b/README_zh.md
index 8d26d5c..32690f1 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -4,10 +4,12 @@ TypeScript 里的轻量多智能体编排引擎。3 个运行时依赖，零配
 
 CrewAI 是 Python。LangGraph 要你自己画图。`open-multi-agent` 是你现有 Node.js 后端里 `npm install` 一下就能用的那一层：一支 agent 团队围绕一个目标协作，就这些。
 
+[![npm version](https://img.shields.io/npm/v/@jackchen_me/open-multi-agent)](https://www.npmjs.com/package/@jackchen_me/open-multi-agent)
 [![GitHub stars](https://img.shields.io/github/stars/JackChen-me/open-multi-agent)](https://github.com/JackChen-me/open-multi-agent/stargazers)
 [![license](https://img.shields.io/github/license/JackChen-me/open-multi-agent)](./LICENSE)
 [![TypeScript](https://img.shields.io/badge/TypeScript-5.6-blue)](https://www.typescriptlang.org/)
-[![coverage](https://img.shields.io/badge/coverage-85%25-brightgreen)](https://github.com/JackChen-me/open-multi-agent/actions)
+[![bundle size](https://img.shields.io/bundlephobia/minzip/@jackchen_me/open-multi-agent)](https://bundlephobia.com/package/@jackchen_me/open-multi-agent)
+[![codecov](https://codecov.io/gh/JackChen-me/open-multi-agent/graph/badge.svg)](https://codecov.io/gh/JackChen-me/open-multi-agent)
 
 [English](./README.md) | **中文**
 
@@ -451,7 +453,7 @@ Issue、feature request、PR 都欢迎。特别想要：
 ## 贡献者
 
 <a href="https://github.com/JackChen-me/open-multi-agent/graphs/contributors">
-  <img src="https://contrib.rocks/image?repo=JackChen-me/open-multi-agent&max=20&v=20260411" />
+  <img src="https://contrib.rocks/image?repo=JackChen-me/open-multi-agent&max=20&v=20260419" />
 </a>
 
 ## Star 趋势
diff --git a/package.json b/package.json
index 6155283..ae96f59 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,7 @@
     "dev": "tsc --watch",
     "test": "vitest run",
     "test:watch": "vitest",
+    "test:coverage": "vitest run --coverage",
     "lint": "tsc --noEmit",
     "test:e2e": "RUN_E2E=1 vitest run tests/e2e/",
     "prepublishOnly": "npm run build"
diff --git a/vitest.config.ts b/vitest.config.ts
index bbc79ff..d6c2252 100644
--- a/vitest.config.ts
+++ b/vitest.config.ts
@@ -4,6 +4,7 @@ export default defineConfig({
   test: {
     coverage: {
       include: ['src/**'],
+      reporter: ['text', 'html', 'lcov', 'json'],
     },
     exclude: [
       '**/node_modules/**',