Initial commit: Claude How To project

Added comprehensive examples for Claude Code features including slash commands, subagents, memory, MCP protocol, skills, and plugins with documentation and quick reference guides.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

06-plugins/pr-review/README.md

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+# PR Review Plugin
+
+Complete PR review workflow with security, testing, and documentation checks.
+
+## Features
+
+✅ Security analysis
+✅ Test coverage checking
+✅ Documentation verification
+✅ Code quality assessment
+✅ Performance impact analysis
+
+## Installation
+
+```bash
+/plugin install pr-review
+```
+
+## What's Included
+
+### Slash Commands
+- `/review-pr` - Comprehensive PR review
+- `/check-security` - Security-focused review
+- `/check-tests` - Test coverage analysis
+
+### Subagents
+- `security-reviewer` - Security vulnerability detection
+- `test-checker` - Test coverage analysis
+- `performance-analyzer` - Performance impact evaluation
+
+### MCP Servers
+- GitHub integration for PR data
+
+### Hooks
+- `pre-review.js` - Pre-review validation
+
+## Usage
+
+### Basic PR Review
+```
+/review-pr
+```
+
+### Security Check Only
+```
+/check-security
+```
+
+### Test Coverage Check
+```
+/check-tests
+```
+
+## Requirements
+
+- Claude Code 1.0+
+- GitHub access
+- Git repository
+
+## Configuration
+
+Set up your GitHub token:
+```bash
+export GITHUB_TOKEN="your_github_token"
+```
+
+## Example Workflow
+
+```
+User: /review-pr
+
+Claude:
+1. Runs pre-review hook (validates git repo)
+2. Fetches PR data via GitHub MCP
+3. Delegates security review to security-reviewer subagent
+4. Delegates testing to test-checker subagent
+5. Delegates performance to performance-analyzer subagent
+6. Synthesizes all findings
+7. Provides comprehensive review report
+
+Result:
+✅ Security: No critical issues found
+⚠️  Testing: Coverage is 65%, recommend 80%+
+✅ Performance: No significant impact
+📝 Recommendations: Add tests for edge cases
+```

06-plugins/pr-review/agents/performance-analyzer.md

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+---
+name: performance-analyzer
+description: Performance impact analysis
+tools: read, grep, bash
+---
+
+# Performance Analyzer
+
+Evaluates performance impact of changes:
+- Algorithm complexity
+- Database query efficiency
+- Memory usage
+- Caching opportunities

06-plugins/pr-review/agents/security-reviewer.md

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+---
+name: security-reviewer
+description: Security-focused code review
+tools: read, grep, diff
+---
+
+# Security Reviewer
+
+Specializes in finding security vulnerabilities:
+- Authentication/authorization issues
+- Data exposure
+- Injection attacks
+- Secure configuration

06-plugins/pr-review/agents/test-checker.md

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+---
+name: test-checker
+description: Test coverage and quality analysis
+tools: read, bash, grep
+---
+
+# Test Checker
+
+Analyzes test coverage and quality:
+- Coverage percentage
+- Missing test cases
+- Test quality assessment
+- Edge case identification

06-plugins/pr-review/commands/check-security.md

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+---
+name: Security Check
+description: Run security-focused code review
+---
+
+# Security Check
+
+Perform focused security analysis on code changes:
+
+1. Authentication/authorization checks
+2. Data exposure risks
+3. Injection vulnerabilities
+4. Cryptographic weaknesses
+5. Sensitive data in logs

06-plugins/pr-review/commands/check-tests.md

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+---
+name: Test Coverage Check
+description: Verify test coverage and quality
+---
+
+# Test Coverage Check
+
+Analyze test coverage and quality:
+
+1. Check test coverage percentage
+2. Identify untested code paths
+3. Review test quality
+4. Suggest missing test cases
+5. Verify edge cases are covered

06-plugins/pr-review/commands/review-pr.md

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+---
+name: Review PR
+description: Start comprehensive PR review with security and testing checks
+---
+
+# PR Review
+
+This command initiates a complete pull request review including:
+
+1. Security analysis
+2. Test coverage verification
+3. Documentation updates
+4. Code quality checks
+5. Performance impact assessment

06-plugins/pr-review/hooks/pre-review.js

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+#!/usr/bin/env node
+
+/**
+ * Pre-review hook
+ * Runs before starting PR review to ensure prerequisites are met
+ */
+
+async function preReview() {
+  console.log('Running pre-review checks...');
+
+  // Check if git repository
+  const { execSync } = require('child_process');
+  try {
+    execSync('git rev-parse --git-dir', { stdio: 'pipe' });
+  } catch (error) {
+    console.error('❌ Not a git repository');
+    process.exit(1);
+  }
+
+  // Check for uncommitted changes
+  try {
+    const status = execSync('git status --porcelain', { encoding: 'utf-8' });
+    if (status.trim()) {
+      console.warn('⚠️  Warning: Uncommitted changes detected');
+    }
+  } catch (error) {
+    console.error('❌ Failed to check git status');
+    process.exit(1);
+  }
+
+  console.log('✅ Pre-review checks passed');
+}
+
+preReview().catch(error => {
+  console.error('Pre-review hook failed:', error);
+  process.exit(1);
+});

06-plugins/pr-review/mcp/github-config.json

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+{
+  "mcpServers": {
+    "github": {
+      "command": "npx",
+      "args": ["@modelcontextprotocol/server-github"],
+      "env": {
+        "GITHUB_TOKEN": "${GITHUB_TOKEN}"
+      }
+    }
+  }
+}

06-plugins/pr-review/plugin.yaml

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+---
+name: pr-review
+version: "1.0.0"
+description: Complete PR review workflow with security, testing, and docs
+author: Anthropic
+license: MIT
+tags:
+  - code-review
+  - quality
+  - security
+
+requires:
+  - claude-code: ">=1.0.0"
+
+components:
+  - type: commands
+    path: commands/
+  - type: agents
+    path: agents/
+  - type: mcp
+    path: mcp/
+  - type: hooks
+    path: hooks/
+
+config:
+  auto_load: true
+  enabled_by_default: true
+---