From f514a3b9c7929026b8a3df42d6f81a9169b2687f Mon Sep 17 00:00:00 2001
From: Zhongwei Li <lizhongwei.nkcs@gmail.com>
Date: Sun, 30 Nov 2025 08:53:55 +0800
Subject: [PATCH] Initial commit

---
 .claude-plugin/plugin.json        |  11 +
 README.md                         |   3 +
 commands/git-master.md            | 337 ++++++++++++++++++++++++++++++
 commands/performance-optimizer.md | 285 +++++++++++++++++++++++++
 plugin.lock.json                  |  49 +++++
 5 files changed, 685 insertions(+)
 create mode 100644 .claude-plugin/plugin.json
 create mode 100644 README.md
 create mode 100644 commands/git-master.md
 create mode 100644 commands/performance-optimizer.md
 create mode 100644 plugin.lock.json

diff --git a/.claude-plugin/plugin.json b/.claude-plugin/plugin.json
new file mode 100644
index 0000000..e7d5f81
--- /dev/null
+++ b/.claude-plugin/plugin.json
@@ -0,0 +1,11 @@
+{
+  "name": "productivity-skills",
+  "description": "Workflow optimization skills for Git, performance profiling, and security auditing",
+  "version": "1.0.0",
+  "author": {
+    "name": "Claude Skills Marketplace"
+  },
+  "commands": [
+    "./commands"
+  ]
+}
\ No newline at end of file
diff --git a/README.md b/README.md
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index 0000000..ac6164d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# productivity-skills
+
+Workflow optimization skills for Git, performance profiling, and security auditing
diff --git a/commands/git-master.md b/commands/git-master.md
new file mode 100644
index 0000000..46bda19
--- /dev/null
+++ b/commands/git-master.md
@@ -0,0 +1,337 @@
+# Git Master
+
+**Description**: Master Git workflows, branching strategies, and advanced techniques
+
+## Git Workflow
+
+### Feature Branch Workflow
+```bash
+# 1. Create feature branch
+git checkout -b feature/user-authentication
+
+# 2. Make changes and commit regularly
+git add .
+git commit -m "Add login form component"
+
+# 3. Push to remote
+git push -u origin feature/user-authentication
+
+# 4. Keep branch updated with main
+git fetch origin
+git rebase origin/main
+
+# 5. Create pull request (via GitHub/GitLab UI)
+
+# 6. After merge, clean up
+git checkout main
+git pull origin main
+git branch -d feature/user-authentication
+```
+
+## Essential Git Commands
+
+### Committing
+```bash
+# Stage specific files
+git add file1.js file2.js
+
+# Stage all changes
+git add .
+
+# Commit with message
+git commit -m "Add user authentication"
+
+# Amend last commit
+git commit --amend -m "Updated message"
+
+# Add to last commit without changing message
+git add forgotten-file.js
+git commit --amend --no-edit
+```
+
+### Branching
+```bash
+# Create and switch to branch
+git checkout -b feature/new-feature
+
+# Switch branches
+git checkout main
+
+# List branches
+git branch              # Local
+git branch -r           # Remote
+git branch -a           # All
+
+# Delete branch
+git branch -d feature/old-feature
+git branch -D feature/old-feature  # Force delete
+
+# Rename branch
+git branch -m old-name new-name
+```
+
+### Syncing
+```bash
+# Fetch changes
+git fetch origin
+
+# Pull changes (fetch + merge)
+git pull origin main
+
+# Pull with rebase (cleaner history)
+git pull --rebase origin main
+
+# Push changes
+git push origin feature/my-feature
+
+# Force push (use carefully!)
+git push --force-with-lease origin feature/my-feature
+```
+
+### Undoing Changes
+```bash
+# Discard unstaged changes
+git checkout -- file.js
+
+# Unstage files
+git reset HEAD file.js
+
+# Undo last commit (keep changes)
+git reset --soft HEAD~1
+
+# Undo last commit (discard changes)
+git reset --hard HEAD~1
+
+# Revert a commit (creates new commit)
+git revert abc123
+```
+
+## Advanced Techniques
+
+### Interactive Rebase
+```bash
+# Clean up last 3 commits
+git rebase -i HEAD~3
+
+# In editor:
+# pick abc123 First commit
+# squash def456 Second commit
+# fixup ghi789 Third commit
+
+# Squash = combine commits, keep both messages
+# Fixup = combine commits, discard this message
+```
+
+### Cherry-Pick
+```bash
+# Apply specific commit from another branch
+git cherry-pick abc123
+
+# Cherry-pick multiple commits
+git cherry-pick abc123 def456 ghi789
+```
+
+### Stash
+```bash
+# Save work in progress
+git stash
+
+# Stash with message
+git stash save "WIP: working on feature X"
+
+# List stashes
+git stash list
+
+# Apply stash
+git stash pop           # Apply and remove
+git stash apply         # Apply and keep
+
+# Apply specific stash
+git stash apply stash@{2}
+
+# Delete stash
+git stash drop stash@{0}
+
+# Clear all stashes
+git stash clear
+```
+
+### Finding Issues
+```bash
+# Search commits
+git log --grep="bug fix"
+
+# Show changes in file
+git log -p file.js
+
+# Find who changed a line
+git blame file.js
+
+# Find when bug was introduced (binary search)
+git bisect start
+git bisect bad          # Current commit is bad
+git bisect good abc123  # Known good commit
+# Git will checkout commits to test
+git bisect good/bad     # Mark each
+git bisect reset        # When done
+```
+
+## Commit Message Best Practices
+
+```
+# Good commit message format
+type(scope): Short description (max 50 chars)
+
+Longer explanation if needed (wrap at 72 chars).
+Explain WHAT and WHY, not HOW.
+
+- Bullet points are okay
+- Use present tense: "Add feature" not "Added feature"
+
+Closes #123
+
+# Types:
+feat:     New feature
+fix:      Bug fix
+docs:     Documentation
+style:    Formatting (no code change)
+refactor: Code restructuring
+test:     Adding tests
+chore:    Maintenance tasks
+```
+
+Examples:
+```
+feat(auth): Add JWT authentication
+
+Implement JWT-based authentication system with refresh tokens.
+Users can now login and maintain session across page reloads.
+
+Closes #456
+
+---
+
+fix(cart): Prevent duplicate items being added
+
+When clicking "Add to cart" rapidly, duplicate items were added.
+Added debouncing to prevent this issue.
+
+Fixes #789
+```
+
+## Git Configuration
+
+```bash
+# User identity
+git config --global user.name "Your Name"
+git config --global user.email "you@example.com"
+
+# Default editor
+git config --global core.editor "code --wait"
+
+# Useful aliases
+git config --global alias.st status
+git config --global alias.co checkout
+git config --global alias.br branch
+git config --global alias.cm "commit -m"
+git config --global alias.lg "log --oneline --graph --all --decorate"
+
+# Auto-setup remote tracking
+git config --global push.autoSetupRemote true
+```
+
+## .gitignore Best Practices
+
+```
+# .gitignore - Common patterns
+
+# Dependencies
+node_modules/
+venv/
+__pycache__/
+
+# Build outputs
+dist/
+build/
+*.pyc
+*.class
+
+# Environment files
+.env
+.env.local
+.env.*.local
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+.DS_Store
+
+# Logs
+logs/
+*.log
+
+# Test coverage
+coverage/
+.nyc_output/
+```
+
+## Resolving Merge Conflicts
+
+```bash
+# 1. Attempt merge
+git merge feature/other-branch
+
+# CONFLICT message appears
+
+# 2. Check conflicted files
+git status
+
+# 3. Open files and resolve conflicts
+# Look for markers:
+# <<<<<<< HEAD
+# Your changes
+# =======
+# Their changes
+# >>>>>>> feature/other-branch
+
+# 4. Edit file to resolve
+# Remove markers, keep desired code
+
+# 5. Mark as resolved
+git add resolved-file.js
+
+# 6. Complete merge
+git commit
+```
+
+## Branch Strategies
+
+### Gitflow
+```
+main         - Production code
+develop      - Integration branch
+feature/*    - New features
+hotfix/*     - Urgent fixes
+release/*    - Release preparation
+```
+
+### Trunk-Based
+```
+main         - Always deployable
+feature/*    - Short-lived (< 1 day)
+```
+
+## When to Use This Skill
+
+- Managing Git repositories
+- Resolving merge conflicts
+- Cleaning up commit history
+- Implementing branching strategies
+- Debugging with Git
+- Setting up Git workflows
+
+---
+
+**Remember**: Commit often, write clear messages, and keep branches short-lived!
diff --git a/commands/performance-optimizer.md b/commands/performance-optimizer.md
new file mode 100644
index 0000000..9c52c58
--- /dev/null
+++ b/commands/performance-optimizer.md
@@ -0,0 +1,285 @@
+# Performance Optimizer
+
+**Description**: Profile, measure, and optimize application performance systematically
+
+## Performance Optimization Process
+
+1. **Measure** - Profile to find bottlenecks
+2. **Analyze** - Understand the root cause
+3. **Optimize** - Implement improvements
+4. **Verify** - Measure again to confirm
+
+## Frontend Performance
+
+### Measuring Performance
+```javascript
+// Using Performance API
+const perfData = performance.getEntriesByType('navigation')[0];
+console.log('Page load time:', perfData.loadEventEnd - perfData.fetchStart);
+
+// Core Web Vitals
+import { getCLS, getFID, getFCP, getLCP, getTTFB } from 'web-vitals';
+
+getCLS(console.log);  // Cumulative Layout Shift
+getFID(console.log);  // First Input Delay
+getFCP(console.log);  // First Contentful Paint
+getLCP(console.log);  // Largest Contentful Paint
+getTTFB(console.log); // Time to First Byte
+```
+
+### React Optimization
+```javascript
+// 1. Memoization
+const MemoizedComponent = React.memo(ExpensiveComponent);
+
+// 2. useMemo for expensive calculations
+const sortedItems = useMemo(() => {
+  return items.sort(compareFunction);
+}, [items]);
+
+// 3. useCallback for function references
+const handleClick = useCallback(() => {
+  doSomething(id);
+}, [id]);
+
+// 4. Lazy loading
+const HeavyComponent = lazy(() => import('./HeavyComponent'));
+
+// 5. Code splitting
+const routes = [
+  { path: '/', component: lazy(() => import('./Home')) },
+  { path: '/dashboard', component: lazy(() => import('./Dashboard')) }
+];
+
+// 6. Virtualize long lists
+import { FixedSizeList } from 'react-window';
+```
+
+### Browser Performance
+```javascript
+// Debounce expensive operations
+function debounce(func, wait) {
+  let timeout;
+  return function(...args) {
+    clearTimeout(timeout);
+    timeout = setTimeout(() => func.apply(this, args), wait);
+  };
+}
+
+const handleSearch = debounce((query) => {
+  fetch(`/api/search?q=${query}`);
+}, 300);
+
+// Use Web Workers for heavy computation
+const worker = new Worker('worker.js');
+worker.postMessage({ data: largeDataset });
+worker.onmessage = (e) => {
+  console.log('Result:', e.data);
+};
+```
+
+## Backend Performance
+
+### Node.js Profiling
+```bash
+# CPU profiling
+node --prof app.js
+# Generates isolate-*.log
+
+# Process the log
+node --prof-process isolate-*.log > processed.txt
+
+# Memory profiling
+node --inspect app.js
+# Open chrome://inspect in Chrome
+```
+
+### Database Optimization
+```javascript
+// ❌ Bad: N+1 query problem
+const users = await User.findAll();
+for (const user of users) {
+  const posts = await Post.findAll({ where: { userId: user.id } });
+  user.posts = posts;
+}
+
+// ✅ Good: Use eager loading
+const users = await User.findAll({
+  include: [{ model: Post }]
+});
+
+// ❌ Bad: Select all columns
+const users = await User.findAll();
+
+// ✅ Good: Select only needed columns
+const users = await User.findAll({
+  attributes: ['id', 'name', 'email']
+});
+
+// Add indexes
+await queryInterface.addIndex('users', ['email']);
+await queryInterface.addIndex('posts', ['userId', 'createdAt']);
+```
+
+### Caching
+```javascript
+// Redis caching
+const redis = require('redis');
+const client = redis.createClient();
+
+async function getUser(id) {
+  // Check cache first
+  const cached = await client.get(`user:${id}`);
+  if (cached) return JSON.parse(cached);
+
+  // Fetch from database
+  const user = await User.findByPk(id);
+
+  // Store in cache (expire after 1 hour)
+  await client.setex(`user:${id}`, 3600, JSON.stringify(user));
+
+  return user;
+}
+
+// In-memory caching
+const NodeCache = require('node-cache');
+const cache = new NodeCache({ stdTTL: 600 });
+
+function expensiveOperation(key) {
+  const cached = cache.get(key);
+  if (cached) return cached;
+
+  const result = doExpensiveCalculation();
+  cache.set(key, result);
+  return result;
+}
+```
+
+## Performance Testing
+
+### Load Testing with Artillery
+```yaml
+# artillery.yml
+config:
+  target: "http://localhost:3000"
+  phases:
+    - duration: 60
+      arrivalRate: 10      # 10 users per second
+    - duration: 120
+      arrivalRate: 50      # Ramp up to 50/sec
+  scenarios:
+    - name: "API test"
+      flow:
+        - get:
+            url: "/api/users"
+        - post:
+            url: "/api/users"
+            json:
+              name: "Test User"
+              email: "test@example.com"
+```
+
+```bash
+# Run load test
+artillery run artillery.yml
+```
+
+### Benchmarking
+```javascript
+// Simple benchmark
+console.time('operation');
+performOperation();
+console.timeEnd('operation');
+
+// Detailed benchmark
+const Benchmark = require('benchmark');
+const suite = new Benchmark.Suite;
+
+suite
+  .add('Array#forEach', function() {
+    [1,2,3].forEach(x => x * 2);
+  })
+  .add('Array#map', function() {
+    [1,2,3].map(x => x * 2);
+  })
+  .on('cycle', function(event) {
+    console.log(String(event.target));
+  })
+  .on('complete', function() {
+    console.log('Fastest is ' + this.filter('fastest').map('name'));
+  })
+  .run();
+```
+
+## Common Optimizations
+
+### 1. Bundle Size (Webpack)
+```javascript
+// webpack.config.js
+module.exports = {
+  optimization: {
+    splitChunks: {
+      chunks: 'all',
+      cacheGroups: {
+        vendor: {
+          test: /[\\/]node_modules[\\/]/,
+          name: 'vendors',
+          priority: 10
+        }
+      }
+    }
+  },
+  performance: {
+    maxEntrypointSize: 512000,
+    maxAssetSize: 512000
+  }
+};
+
+// Analyze bundle
+npm install --save-dev webpack-bundle-analyzer
+```
+
+### 2. Image Optimization
+```bash
+# Convert to WebP
+cwebp image.jpg -q 80 -o image.webp
+
+# Optimize PNG
+pngquant image.png --output image-optimized.png
+
+# Responsive images
+convert image.jpg -resize 400 image-400w.jpg
+convert image.jpg -resize 800 image-800w.jpg
+```
+
+### 3. HTTP/2 & Compression
+```javascript
+// Express with compression
+const compression = require('compression');
+app.use(compression());
+
+// Nginx configuration
+# gzip compression
+gzip on;
+gzip_types text/plain text/css application/json application/javascript;
+```
+
+## Metrics to Track
+
+- **First Contentful Paint (FCP)**: < 1.8s
+- **Largest Contentful Paint (LCP)**: < 2.5s
+- **Time to Interactive (TTI)**: < 3.8s
+- **Cumulative Layout Shift (CLS)**: < 0.1
+- **First Input Delay (FID)**: < 100ms
+
+## When to Use This Skill
+
+- Application is slow
+- Optimizing page load time
+- Reducing server response time
+- Improving database query performance
+- Analyzing bundle size
+
+---
+
+**Remember**: Measure first, optimize second. Don't guess where the bottleneck is!
diff --git a/plugin.lock.json b/plugin.lock.json
new file mode 100644
index 0000000..386a765
--- /dev/null
+++ b/plugin.lock.json
@@ -0,0 +1,49 @@
+{
+  "$schema": "internal://schemas/plugin.lock.v1.json",
+  "pluginId": "gh:samuelgarrett/claude-code-plugin-test:productivity-skills",
+  "normalized": {
+    "repo": null,
+    "ref": "refs/tags/v20251128.0",
+    "commit": "e2895386bedf1e6168529ad9e43d2c3f486a0262",
+    "treeHash": "cb105bea723cbda8f7a61d4ab58bbafb9f4738566a0084508f4bc7eacaca51bc",
+    "generatedAt": "2025-11-28T10:28:08.228904Z",
+    "toolVersion": "publish_plugins.py@0.2.0"
+  },
+  "origin": {
+    "remote": "git@github.com:zhongweili/42plugin-data.git",
+    "branch": "master",
+    "commit": "aa1497ed0949fd50e99e70d6324a29c5b34f9390",
+    "repoRoot": "/Users/zhongweili/projects/openmind/42plugin-data"
+  },
+  "manifest": {
+    "name": "productivity-skills",
+    "description": "Workflow optimization skills for Git, performance profiling, and security auditing",
+    "version": "1.0.0"
+  },
+  "content": {
+    "files": [
+      {
+        "path": "README.md",
+        "sha256": "8cbf946e8d6c098a3b61bac339de31a100ff82babf5f87c5d5f54c90325485f6"
+      },
+      {
+        "path": ".claude-plugin/plugin.json",
+        "sha256": "32f662e777956667c0f27d606a10d7d7cdeda15536c7a61f89a1b9431d200a12"
+      },
+      {
+        "path": "commands/git-master.md",
+        "sha256": "54a3c56c1ed48e6bfdc47098f7fa4329f75d21a0199244e678d63667055b252c"
+      },
+      {
+        "path": "commands/performance-optimizer.md",
+        "sha256": "f74419ee094c50ba6eec682cfb7954d3631c932a782170f05c73634e8a83a87b"
+      }
+    ],
+    "dirSha256": "cb105bea723cbda8f7a61d4ab58bbafb9f4738566a0084508f4bc7eacaca51bc"
+  },
+  "security": {
+    "scannedAt": null,
+    "scannerVersion": null,
+    "flags": []
+  }
+}
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