feat: github diff action

.check-dependency-version-consistency.json

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+{
+  "skip": [
+    "@types/*",
+    "typescript",
+    "eslint*",
+    "prettier*",
+    "@babel/*",
+    "babel-*",
+    "@rsdoctor/client",
+    "@rsdoctor/cli"
+  ],
+  "ignorePatterns": [
+    "**/node_modules/**",
+    "**/dist/**",
+    "**/build/**"
+  ]
+}

packages/action/README.md

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+# Compressed Size Action Demo
+
+This is a simplified GitHub Action for checking file compression size differences before and after code changes.
+
+## Features
+
+- Intelligently detects GitHub event types and automatically executes corresponding operations
+- **On MR submission**: Only downloads artifacts from the target branch (if they exist)
+- **On MR merge**: Only uploads artifacts from the current branch
+- Supports custom file paths
+- Finds the latest commit of the target branch through GitHub API
+- Artifacts are named by commit hash to avoid conflicts
+
+## Smart Behavior
+
+### 🔄 On MR Merge (push to main branch)
+
+- Only uploads artifacts from the current branch
+- Artifact naming: `path-filename-commithash.extension`
+- Used to save the latest baseline data
+
+### 📥 On MR Submission (pull_request event)
+
+- Only downloads artifacts from the target branch (if they exist)
+- If target branch artifacts are found, downloads and compares them
+- If not found, prints "No baseline data found"
+- Used to compare current changes with baseline data
+
+## Configuration
+
+```yaml
+- uses: ./
+  with:
+    # GitHub token for API access
+    github_token: ${{ secrets.GITHUB_TOKEN }}
+
+    # File path to upload (relative to project root)
+    file_path: 'artifacts/1.json'
+
+    # Target branch (defaults to main)
+    target_branch: 'main'
+```
+
+## Artifact Naming Rules
+
+Artifacts will be named using the following format:
+
+- Format: `path-filename-commithash.extension`
+- Example: `artifacts-1-f18c5686ba.json`
+
+## Usage Scenarios
+
+### Scenario 1: On MR Submission
+
+```yaml
+on:
+  pull_request:
+    types: [opened, synchronize]
+```
+
+The Action will:
+
+1. Find the latest commit of the target branch
+2. Attempt to download the corresponding artifacts
+3. If real baseline data is found, use real data for comparison
+4. If not found, use built-in demo data as baseline for comparison display
+5. Generate a Bundle Size Report card
+
+### Scenario 2: On MR Merge
+
+```yaml
+on:
+  push:
+    branches: [main]
+```
+
+The Action will:
+
+1. Upload artifacts from the current branch
+2. Generate a simple Bundle Size Report card
+3. Artifacts will serve as baseline data for subsequent MRs
+
+## Report Card Example
+
+The Action will generate a report card in the following format in GitHub CI:
+
+### 📦 Bundle Size Report
+
+| Metric         | Current  | Baseline |
+| -------------- | -------- | -------- |
+| 📊 Total Size  | 100.0 MB | 99.0 MB  |
+| 📁 Files Count | 3        | 3        |
+
+### 📄 File Details
+
+| File            | Size    |
+| --------------- | ------- |
+| dist/main.js    | 50.0 MB |
+| dist/vendor.js  | 40.0 MB |
+| dist/styles.css | 10.0 MB |
+
+## JSON File Format
+
+The JSON file pointed to by your `file_path` should contain data in the following format:
+
+```json
+{
+  "totalSize": 104857600,
+  "files": [
+    {
+      "path": "dist/main.js",
+      "size": 52428800,
+      "gzipSize": 10485760,
+      "brotliSize": 8388608
+    },
+    {
+      "path": "dist/vendor.js",
+      "size": 41943040
+    }
+  ]
+}
+```
+
+- `totalSize`: Total size (in bytes)
+- `files`: List of files, each containing path and size information
+
+## Demo Baseline Data
+
+When real artifacts from the target branch cannot be found, the Action will automatically use built-in demo data as baseline for comparison:
+
+```json
+{
+  "totalSize": 103809024, // ~99MB
+  "files": [
+    {
+      "path": "dist/main.js",
+      "size": 51380224 // ~49MB
+    },
+    {
+      "path": "dist/vendor.js",
+      "size": 41943040 // ~40MB
+    },
+    {
+      "path": "dist/styles.css",
+      "size": 10485760 // ~10MB
+    }
+  ]
+}
+```
+
+This way, even on first run or when there's no historical data, meaningful comparison reports can be generated to help developers understand the current build size situation.
+
+## Development
+
+```bash
+# Install dependencies
+npm install
+
+# Build
+npm run build
+```

packages/action/action.yml

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+name: 'compressed-size-action-demo'
+description: 'A simple demo for checking compressed size differences'
+branding:
+  icon: 'archive'
+  color: 'purple'
+inputs:
+  github_token:
+    description: 'The GITHUB_TOKEN secret'
+    required: false
+    default: ${{ github.token }}
+  file_path:
+    description: 'Path to the file to upload (relative to project root)'
+    required: true
+  target_branch:
+    description: 'The target branch to compare against (defaults to main)'
+    required: false
+    default: 'main'
+
+runs:
+  using: 'node20'
+  main: 'index.js'

packages/action/artifacts/demo.json

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+{
+  "totalSize": 103809024,
+  "files": [
+    {
+      "path": "dist/main.js",
+      "size": 51380224,
+      "gzipSize": 10276045,
+      "brotliSize": 8220836
+    },
+    {
+      "path": "dist/vendor.js",
+      "size": 41943040,
+      "gzipSize": 8388608,
+      "brotliSize": 6291456
+    },
+    {
+      "path": "dist/styles.css",
+      "size": 10485760,
+      "gzipSize": 2097152,
+      "brotliSize": 1572864
+    }
+  ]
+}

packages/action/artifacts/example.json

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+{
+  "totalSize": 104857600,
+  "files": [
+    {
+      "path": "dist/main.js",
+      "size": 52428800,
+      "gzipSize": 10485760,
+      "brotliSize": 8388608
+    },
+    {
+      "path": "dist/vendor.js",
+      "size": 41943040,
+      "gzipSize": 8388608,
+      "brotliSize": 6291456
+    },
+    {
+      "path": "dist/styles.css",
+      "size": 10485760,
+      "gzipSize": 2097152,
+      "brotliSize": 1572864
+    }
+  ]
+}

packages/action/package.json

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+{
+  "name": "@rsdoctor/action",
+  "version": "0.0.1",
+  "license": "MIT",
+  "description": "A GitHub Action for bundle size analysis and reporting",
+  "main": "./index.js",
+  "scripts": {
+    "build": "rslib build"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/web-infra-dev/rsdoctor",
+    "directory": "packages/actions"
+  },
+  "publishConfig": {
+    "access": "public"
+  },
+  "files": [
+    "index.js",
+    "action.yml",
+    "README.md"
+  ],
+  "keywords": [
+    "github-action",
+    "bundle-size",
+    "performance",
+    "analysis"
+  ],
+  "devDependencies": {
+    "@types/node": "^22.8.1"
+  },
+  "dependencies": {
+    "@rsdoctor/cli": "1.3.3-beta.2",
+    "@rsdoctor/client": "1.3.3-beta.2",
+    "@actions/artifact": "^2.3.2",
+    "@actions/core": "^1.2.6",
+    "@actions/github": "^4.0.0",
+    "size-plugin-core": "0.0.9",
+    "yauzl": "^3.2.0"
+  }
+}

packages/action/rslib.config.ts

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+import { defineConfig } from '@rslib/core';
+
+export default defineConfig({
+  lib: [
+    {
+      bundle: true,
+      dts: false,
+      format: 'cjs',
+    },
+  ],
+});